WO1992009420A1 - Process and apparatus for applying a plastics enclosure to surfaces that are to be protected - Google Patents
Process and apparatus for applying a plastics enclosure to surfaces that are to be protected Download PDFInfo
- Publication number
- WO1992009420A1 WO1992009420A1 PCT/GB1991/002095 GB9102095W WO9209420A1 WO 1992009420 A1 WO1992009420 A1 WO 1992009420A1 GB 9102095 W GB9102095 W GB 9102095W WO 9209420 A1 WO9209420 A1 WO 9209420A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- article
- enclosed
- semi finished
- polymeric
- polymeric part
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 30
- 239000004033 plastic Substances 0.000 title claims description 18
- 229920003023 plastic Polymers 0.000 title claims description 18
- 238000000465 moulding Methods 0.000 claims abstract description 24
- 238000001125 extrusion Methods 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims description 10
- 238000003825 pressing Methods 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 4
- 238000005260 corrosion Methods 0.000 abstract description 3
- 230000007797 corrosion Effects 0.000 abstract description 3
- 238000010924 continuous production Methods 0.000 abstract 1
- 230000007613 environmental effect Effects 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 4
- 239000004020 conductor Substances 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 229920001169 thermoplastic Polymers 0.000 description 4
- 238000000071 blow moulding Methods 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 235000012773 waffles Nutrition 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
- B29C70/70—Completely encapsulating inserts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
- B29C43/18—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. compression moulding around inserts or for coating articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
- B29C70/72—Encapsulating inserts having non-encapsulated projections, e.g. extremities or terminal portions of electrical components
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/14—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for joining or terminating cables
- H02G1/145—Moulds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
- B29C43/18—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. compression moulding around inserts or for coating articles
- B29C2043/181—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. compression moulding around inserts or for coating articles encapsulated
- B29C2043/182—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. compression moulding around inserts or for coating articles encapsulated completely
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/16—Cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/07—Flat, e.g. panels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
Definitions
- the invention relates to a process and an apparatus for applying a plastics enclosure to surfaces of articles that are to be protected, especially for applying plastics enclosures to a metal housing.
- DE 3127869 describes a method of producing a connection and/or branch between coaxial cables using a kit comprising a metal housing containing an electronics plate, and a heat shrinkable polymeric sleeve enclosing the housing.
- the housing is provided with cable entries to receive the cables to be connected and/or branched, and these cable entries are connected to the electronics plate.
- the heat shrinkable sleeve is provided in two halves having corresponding cable entry pipes, the two halves are pre-shrunk over the housing at the factory, and the resulting branch set can then be delivered to the building site.
- a first aspect of the invention provides a process for applying a polymeric enclosure to surfaces of articles that are to be protected, comprising
- a second aspect of the invention provides an apparatus suitable for carrying out the process according to the first aspect of the invention, comprising
- a semi finished polymeric part extruder (a) a semi finished polymeric part extruder, a holder for the article or articles to be enclosed and a tool holder containing moulding presses for pressing against the semi finished polymeric part which moulding presses can be moved from an opening state in which the semi finished polymeric part can be inserted around the article to be enclosed and within the moulding presses, to a closed state in which the moulding process urge the semi finished part against the article to be enclosed .
- the invention has a number of advantages over known procedures. Since the semi- finished polymeric part that surrounds the article to be enclosed is still in a deformable state, it is possible to enclose and protect not only regularly shaped articles, but also articles having comparatively complicated outer contours in a simple manner. Also the - 4 -
- process can be carried out virtually continuously, which means, in particular, that it can be carried out very economically.
- a process for the manufacture of an insulated connection between electrical conductors with a thermoplastic plastics foil in which inter alia a thermoplastic plastics tube is pushed over the connected conductors upstream of the connection, is known from DE-OS 16 46 408.
- the connection site is coated with a plastics paste and the plastics screw tube is pushed over the corresponding site including the plastics insulation and the entire assembly is then welded to form a homogeneous body with the aid of a kind of waffle iron. It will be appreciated that this procedure is very complicated. Also, it does not employ semi-finished parts in their deformable state, nor is it suitable for continuous operation.
- the semi-finished polymeric part is in the form of a double strip of polymeric material or in the form of a slit polymeric tube.
- the wall thickness of the strip or tube may or may not vary in cross-section.
- the article to be enclosed is, for example, a cable entry pipe into a housing, eg for connection or branching of coaxial cable leads via an electronics plate or similar within the housing, the tips of the cable entries can be provided with an accumulation of material in order to render possible a higher tensile strength or the like when the cable leads or the like have been inserted.
- a moulding process is used to urge the semi finished part against the article.
- the moulding involves the application of pressing tools against the semi finished polymeric part towards the article to be - o
- the inner surface of the pressing tools may be arranged to correspond generally with that of the outer surface of the article to be enclosed.
- compressed air may be applied to the semi ⁇ finished polymeric part to apply, or to enhance application of the part around the article to be enclosed.
- the compressed air may be used in addition to cooling air applied to the semi-finished polymeric part.
- air may be withdrawn from within the article to be enclosed, thereby applying a drawing pressure on the polymeric part, to apply or to enhance application of the part.
- a combination of compressed air applied to the outer surface, and drawing pressure may also be used.
- Blow moulding equipment may be used in the above embodiment of the present invention, which may be considered as an 'inside-out' blow moulding process.
- the invention provides as well as a method, an apparatus as set out above in accordance with the second aspect of the invention.
- the tool holder is advantageously constructed to be displaceable together with the article holder so that the article can be brought into the extrusion path of the semi-finished polymeric part.
- the holder for the article to be enclosed is equipped with a suction channel.
- This channel can be used for at least partially evacuating air from the region of the article to be enclosed.
- This apparatus makes it possible to produce, at least temporarily, a slight vacuum in the interior of the article to be enclosed, which assists the application of the outer plastics enclosure.
- the pressing tools can be equipped at their surfaces, facing - 4 -
- a process for the manufacture of an insulated connection between electrical conductors with a thermoplastic plastics foil in which inter alia a thermoplastic plastics tube is pushed over the connected conductors upstream of the connection, is known from DE-OS 16 46 408.
- the connection site is coated with a plastics paste and the plastics screw tube is pushed over the corresponding site including the plastics insulation and the entire assembly is then welded to form a homogeneous body with the aid of a kind of waffle iron. It will be appreciated that this procedure is very complicated. Also, it does not employ semi-finished parts in their deformable state, nor is it suitable for continuous operation.
- the semi-finished polymeric part is in the form of a double strip of polymeric material or in the form of a slit polymeric tube.
- the wall thickness of the strip or tube may or may not vary in cross-section.
- the article to be enclosed is, for example, a cable entry pipe into a housing, eg for connection or branching of coaxial cable leads via an electronics plate or similar within the housing, the tips of the cable entries can be provided with an accumulation of material in order to render possible a higher tensile strength or the like when the cable leads or the like have been inserted.
- a moulding process is used to urge the semi finished part against the article.
- the moulding involves the application of pressing tools against the semi finished polymeric part towards the article to be - 7 -
- the tool holder 1 is then moved back to the left in the direction of the arrow 10 ( Figure 1C), the moulding tools 2a, 2b are subsequently opened according to the double arrow 11, and the holding rod 4 is withdrawn to the left according to arrow 12, so that the finished enclosed article 5, which is then designated 5' in Figure ID, can be removed or ejected.
- the sequence of steps according to Figures 1A to ID can then be repeated on other parts.
- the article holder 3 may be constructed in a different manner.
- it may be designed as a revolving holder, i.e. by rotating, it can in one operating process remove one article already enclosed and introduce the next article 5 that is to be enclosed.
- the described embodiment can, of course, be further modified in various respects.
- the semi-finished polymeric part 7 may be in the form of a closed tube or a tube that is open at one side and so on.
- the insides of the moulding tools 2 can be loaded with compressed air.
- air can be sucked out of the interior of the article being enclosed via he holder 4.
- Other methods of assisting moulding can also be used.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Manufacturing & Machinery (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
A process and an apparatus for applying a polymeric enclosure to surfaces of articles (5) to provide protection against environmental influences, corrosion or mechanical stressing of the surfaces, is described. The process is essentially a continuous process, involving extruding a semi-finished polymeric part (7) in the form of a strip or tube which is slit or split or in the form of two strips, while it is in its deformable state, positioning the article (5) to be enclosed in the extrusion path of the semi-finished part and then using moulding presses (2a, 2b) to urge the semi-finished part around the article.
Description
DESCRIPTION
Process and apparatus for applying a plastics enclosure to surfaces that are to be protected
The invention relates to a process and an apparatus for applying a plastics enclosure to surfaces of articles that are to be protected, especially for applying plastics enclosures to a metal housing.
For a long time, efforts have been made to protect against corrosion those surfaces of articles that are exposed to moisture, especially their outer surfaces. For example in the field of broad band communications cables metal housings are typically provided at junctions of such cables. It is known to protect these metal housings in shrinkable plastics enclosures, as described, for example, in DE-30 40 864 Al, DE-31 27 869-A1 and DE-31 24 374-A1. .
As an example, DE 3127869 describes a method of producing a connection and/or branch between coaxial cables using a kit comprising a metal housing containing an electronics plate, and a heat shrinkable polymeric sleeve enclosing the housing. The housing is provided with cable entries to receive the cables to be connected and/or branched, and these cable entries are connected to the electronics plate. The heat shrinkable sleeve is provided in two halves having corresponding cable entry pipes, the two halves are pre-shrunk over the housing at the factory, and the resulting branch set can then be delivered to the building site.
It is also known to spray a liquid plastics material onto the outer surface of the housings as a corrosion protection. The coating procedure may take place in several stages, for example a curable synthetic resin may be sprayed first, and then a filler sprayed on subsequently, as disclosed in DE-AS 21 09 393. Similarly, plastics tubes that are closed by spraying on polyethylene are disclosed in DE-AS 18 01 933, and application of
- -
Thus, a first aspect of the invention provides a process for applying a polymeric enclosure to surfaces of articles that are to be protected, comprising
(i) extruding a polymeric part in the form of a strip or tube, which is slit or split, or is in the form of two strips,
(ii) positioning the article to be enclosed in the extrusion path of the semi finished part, through the slit or split or between the two strips while the part is still in a deformable state, and
(iii) applying moulding presses against the semi finished part to urge it against the surfaces of the article to be enclosed.
A second aspect of the invention provides an apparatus suitable for carrying out the process according to the first aspect of the invention, comprising
(a) a semi finished polymeric part extruder, a holder for the article or articles to be enclosed and a tool holder containing moulding presses for pressing against the semi finished polymeric part which moulding presses can be moved from an opening state in which the semi finished polymeric part can be inserted around the article to be enclosed and within the moulding presses, to a closed state in which the moulding process urge the semi finished part against the article to be enclosed .
The invention has a number of advantages over known procedures. Since the semi- finished polymeric part that surrounds the article to be enclosed is still in a deformable state, it is possible to enclose and protect not only regularly shaped articles, but also articles having comparatively complicated outer contours in a simple manner. Also the
- 4 -
process can be carried out virtually continuously, which means, in particular, that it can be carried out very economically.
A process for the manufacture of an insulated connection between electrical conductors with a thermoplastic plastics foil, in which inter alia a thermoplastic plastics tube is pushed over the connected conductors upstream of the connection, is known from DE-OS 16 46 408. The connection site is coated with a plastics paste and the plastics screw tube is pushed over the corresponding site including the plastics insulation and the entire assembly is then welded to form a homogeneous body with the aid of a kind of waffle iron. It will be appreciated that this procedure is very complicated. Also, it does not employ semi-finished parts in their deformable state, nor is it suitable for continuous operation.
Further embodiments of the process and apparatus according to the invention is apparent from the sub claims. In preferred embodiments the semi-finished polymeric part is in the form of a double strip of polymeric material or in the form of a slit polymeric tube. The wall thickness of the strip or tube may or may not vary in cross-section.
Especially by providing an extruded polymeric part that varies in wall thickness across its surface, it is possible to provide an accumulation of material in some regions should that be necessary, for example, for reasons of the use to which the finished article enclosed by the polymeric part is to be put. If the article to be enclosed is, for example, a cable entry pipe into a housing, eg for connection or branching of coaxial cable leads via an electronics plate or similar within the housing, the tips of the cable entries can be provided with an accumulation of material in order to render possible a higher tensile strength or the like when the cable leads or the like have been inserted.
A moulding process is used to urge the semi finished part against the article. Preferably the moulding involves the application of pressing tools against the semi finished polymeric part towards the article to be
- o
enclosed. The inner surface of the pressing tools may be arranged to correspond generally with that of the outer surface of the article to be enclosed.
In one embodiment, compressed air may be applied to the semi¬ finished polymeric part to apply, or to enhance application of the part around the article to be enclosed. The compressed air may be used in addition to cooling air applied to the semi-finished polymeric part. In another embodiment air may be withdrawn from within the article to be enclosed, thereby applying a drawing pressure on the polymeric part, to apply or to enhance application of the part. A combination of compressed air applied to the outer surface, and drawing pressure may also be used.
Blow moulding equipment may be used in the above embodiment of the present invention, which may be considered as an 'inside-out' blow moulding process.
The invention provides as well as a method, an apparatus as set out above in accordance with the second aspect of the invention.
Preferred constructions of the apparatus are apparent from the sub claims.
The tool holder is advantageously constructed to be displaceable together with the article holder so that the article can be brought into the extrusion path of the semi-finished polymeric part.
In a preferred embodiment of the apparatus, the holder for the article to be enclosed is equipped with a suction channel. This channel can be used for at least partially evacuating air from the region of the article to be enclosed. This apparatus makes it possible to produce, at least temporarily, a slight vacuum in the interior of the article to be enclosed, which assists the application of the outer plastics enclosure. Instead, or in addition, the pressing tools can be equipped at their surfaces, facing
- 4 -
process can be carried out virtually continuously, which means, in particular, that it can be carried out very economically.
A process for the manufacture of an insulated connection between electrical conductors with a thermoplastic plastics foil, in which inter alia a thermoplastic plastics tube is pushed over the connected conductors upstream of the connection, is known from DE-OS 16 46 408. The connection site is coated with a plastics paste and the plastics screw tube is pushed over the corresponding site including the plastics insulation and the entire assembly is then welded to form a homogeneous body with the aid of a kind of waffle iron. It will be appreciated that this procedure is very complicated. Also, it does not employ semi-finished parts in their deformable state, nor is it suitable for continuous operation.
Further embodiments of the process and apparatus according to the invention is apparent from the sub claims. In preferred embodiments the semi-finished polymeric part is in the form of a double strip of polymeric material or in the form of a slit polymeric tube. The wall thickness of the strip or tube may or may not vary in cross-section.
Especially by providing an extruded polymeric part that varies in wall thickness across its surface, it is possible to provide an accumulation of material in some regions should that be necessary, for example, for reasons of the use to which the finished article enclosed by the polymeric part is to be put. If the article to be enclosed is, for example, a cable entry pipe into a housing, eg for connection or branching of coaxial cable leads via an electronics plate or similar within the housing, the tips of the cable entries can be provided with an accumulation of material in order to render possible a higher tensile strength or the like when the cable leads or the like have been inserted.
A moulding process is used to urge the semi finished part against the article. Preferably the moulding involves the application of pressing tools against the semi finished polymeric part towards the article to be
- 7 -
tools 2a and 2b are then advanced towards each other according to the double arrow 9 in Figure IB, until the position shown in Figure 1C is reached, in which position shown in Figure 1C cutting operations or the like can be simultaneously performed.
The tool holder 1 is then moved back to the left in the direction of the arrow 10 (Figure 1C), the moulding tools 2a, 2b are subsequently opened according to the double arrow 11, and the holding rod 4 is withdrawn to the left according to arrow 12, so that the finished enclosed article 5, which is then designated 5' in Figure ID, can be removed or ejected. The sequence of steps according to Figures 1A to ID can then be repeated on other parts.
The article holder 3, may be constructed in a different manner. For example it may be designed as a revolving holder, i.e. by rotating, it can in one operating process remove one article already enclosed and introduce the next article 5 that is to be enclosed.
The described embodiment can, of course, be further modified in various respects. For example, the semi-finished polymeric part 7 may be in the form of a closed tube or a tube that is open at one side and so on. In order to assist moulding, the insides of the moulding tools 2 can be loaded with compressed air. As another option, or in addition air can be sucked out of the interior of the article being enclosed via he holder 4. Other methods of assisting moulding can also be used.
Claims
1. A process for applying a polymeric enclosure (7a) to surfaces of articles (5) that are to be protected, comprising
(i) extruding a polymeric part (7) in the form of a strip or tube, which is slit or split, or is in the form of two strips,
(ii) positioning the article (5) to be enclosed in the extrusion path of the semi finished part (7), through the slit or split or between the two strips, while the part is still in a deformable state, and
(iii) applying moulding presses (2a, 2b) against the semi finished part (7) to urge it against the surfaces of the article (5) to be enclosed.
2. A process according to claim 2, wherein the semi finished polymeric part (7) is in the form of a double strip of plastics material, or in the form of a slit polymeric tube and the article to be enclosed (5) is guided between the strips of plastics material or into the interior of the tube and, subsequently, the strips of plastics material or the regions of the plastics tube are pressed together by means of pressing tools (2a, 2b), thereby enclosing the article (5) to be protected.
*
3. A process according to claim 1 or 2, wherein semi finished polymeric part(s) (7) having regions of differing wall thickness across their surface are used to enclose the articles (5).
4. A process according to claim 1, 2 or 3, wherein in addition to applying moulding presses (2a, 2b) to the semi finished polymeric part, compressed air is applied to the semi finished polymeric part to urge it against the surfaces of the articles (5) to be enclosed.
5. A process according to claim 4. wherein the compressed air is used in addition as cooling air for cooling the semi finished polymeric part(7).
6. An apparatus suitable for carrying out the process according to any of the preceding claims, comprising
(a) a semi finished polymeric part extruder (8), a holder (3) for the article or articles to be enclosed and a tool holder (1) containing moulding presses (2a, 2b) for pressing against the semi finished polymeric part (7), which moulding presses can be moved from an open state in which the semi finished polymeric part (7) can be inserted around the article to be enclosed (5) and within the moulding presses (2a, 2b), to a closed state in which the moulding presses urge the semi finished part (7) against the article to be enclosed (5).
7. A apparatus according to claim 6, wherein the tool holder (1) together with the article holder (3) is equipped with a device (4) for positioning the article to be enclosed (5) together with the moulding presses (2a, 2b) in their open state into the extrusion path of the semi finished polymeric part (7).
8. An apparatus according to claim 6 or 7, wherein the holder (3) for the article (5) to be enclosed is equipped with a suction channel for at least partially evacuating air from the region of the article (5) to be enclosed.
9. An apparatus according to any of claims 6 to 8, wherein the moulding presses (2a, 2b) are equipped on their inner surfaces with outlet nozzles for supplying moulding and cooling air, which outlets are directed towards the article (5) to be enclosed.
10. An apparatus according to any of claims 6 to 9, wherein a plurality of article holders are provided in a linear or 1 0 revolving arrangement on a holder (3).
11. An article provided with a polymeric enclosure (7) formed by a semi finished polymeric part which has been extruded in the form of a strip or tube which is slit or split or is in the form of two strips and which has been pressed in its deformable state around the outer surfaces of the article inserted through the slit or split or between the two strips by means of moulding presses (2a and 2b).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019930701583A KR930702143A (en) | 1990-11-27 | 1991-11-27 | Method and device for enclosing the surface to be protected with a plastic enclosure |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4037675A DE4037675A1 (en) | 1990-11-27 | 1990-11-27 | METHOD AND DEVICE FOR APPLYING A PLASTIC COATING TO SURFACES TO BE PROTECTED |
| DEP4037675.3 | 1990-11-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1992009420A1 true WO1992009420A1 (en) | 1992-06-11 |
Family
ID=6418992
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/GB1991/002095 WO1992009420A1 (en) | 1990-11-27 | 1991-11-27 | Process and apparatus for applying a plastics enclosure to surfaces that are to be protected |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0563061A1 (en) |
| KR (1) | KR930702143A (en) |
| DE (2) | DE9017905U1 (en) |
| WO (1) | WO1992009420A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005099997A1 (en) * | 2004-04-16 | 2005-10-27 | France (Qld) Pty Ltd | Vacuum form encapsulated articles |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002098637A1 (en) * | 2001-06-01 | 2002-12-12 | Meridian Automotive Systems, Inc. | Thermoplastic sandwich panel and twin sheet moulding method of making same |
| CN110299680B (en) * | 2019-03-19 | 2020-10-23 | 国网上海市电力公司 | Power transmission and transformation circuit installation and maintenance device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1921788A1 (en) * | 1969-04-29 | 1971-02-04 | Gruenzweig & Hartmann | Process for the production of plastic profiles provided with metal inserts |
| FR2246368A1 (en) * | 1973-10-04 | 1975-05-02 | Philips Nv | |
| FR2287995A1 (en) * | 1974-10-17 | 1976-05-14 | Ici Ltd | PROCEDURE FOR COVERING A SUBSTRATE BY MEANS OF A THERMOPLASTIC MATERIAL |
| US4148856A (en) * | 1974-08-16 | 1979-04-10 | Corning Glass Works | Method for continuous component encapsulation |
| US4436478A (en) * | 1981-07-27 | 1984-03-13 | The West Company | Apparatus for making molded articles |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE434141C (en) * | 1925-05-26 | 1926-09-16 | Felten & Guilleaume Carlswerk | Sleeve for deep sea cable |
| DE756979C (en) * | 1937-05-14 | 1954-04-29 | Aeg | Cable fittings and accessories |
| DE910178C (en) * | 1944-03-28 | 1954-04-29 | Aeg | Method for sealing the splice points of, in particular, plastic-sheathed cables |
| DE972059C (en) * | 1952-06-04 | 1959-05-14 | Osnabruecker Kupfer Und Drahtw | Corrugated pipes, armored lines and cables as well as cables with corrugated sheaths and processes for the production of protective covers therefor |
| DE1005150B (en) * | 1952-11-05 | 1957-03-28 | Siemens Ag | Process for the production of cable fittings |
| DE962719C (en) * | 1953-10-08 | 1957-04-25 | Huels Chemische Werke Ag | Stretched shapes seamlessly sheathed with thermoplastics |
| DE1177708B (en) * | 1962-09-04 | 1964-09-10 | Siemens Ag | Tubular arrangement for connecting cable sheaths or cable fittings made of plastic with those made of metal |
| DE1590755A1 (en) * | 1966-10-06 | 1970-06-25 | Telefunken Patent | Sliding resistance regulator |
| DE1646408A1 (en) * | 1967-04-29 | 1971-07-15 | Blau Karl Ludwig | Mass for the production of molded bodies |
| DE2109393A1 (en) * | 1971-02-27 | 1972-09-07 | Erich Pagendarm KG. 2000 Hamburg | Rotating doctor rod with magnetic or pneumatic pressure |
| DE3040864A1 (en) * | 1980-10-30 | 1982-06-03 | Walter Rose Gmbh & Co Kg, 5800 Hagen | DEVICE FOR CONNECTING AND SHEATING CABLE CONNECTIONS, IN PARTICULAR BROADBAND COMMUNICATION CABLES |
| DE3124374C2 (en) * | 1981-06-22 | 1985-05-23 | Siemens AG, 1000 Berlin und 8000 München | Cable sleeve made of a metal housing and a sheath made of shrinkable material |
| DE3127869A1 (en) * | 1981-07-15 | 1983-02-03 | Elektro- Und Gas-Armaturen-Fabrik Gmbh, 5800 Hagen | Method for producing a connection and/or junction of coaxial cables, and a kit for carrying out the method |
-
1990
- 1990-11-27 DE DE9017905U patent/DE9017905U1/en not_active Expired - Lifetime
- 1990-11-27 DE DE4037675A patent/DE4037675A1/en active Granted
-
1991
- 1991-11-27 KR KR1019930701583A patent/KR930702143A/en not_active Withdrawn
- 1991-11-27 EP EP91920407A patent/EP0563061A1/en not_active Withdrawn
- 1991-11-27 WO PCT/GB1991/002095 patent/WO1992009420A1/en not_active Application Discontinuation
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1921788A1 (en) * | 1969-04-29 | 1971-02-04 | Gruenzweig & Hartmann | Process for the production of plastic profiles provided with metal inserts |
| FR2246368A1 (en) * | 1973-10-04 | 1975-05-02 | Philips Nv | |
| US4148856A (en) * | 1974-08-16 | 1979-04-10 | Corning Glass Works | Method for continuous component encapsulation |
| FR2287995A1 (en) * | 1974-10-17 | 1976-05-14 | Ici Ltd | PROCEDURE FOR COVERING A SUBSTRATE BY MEANS OF A THERMOPLASTIC MATERIAL |
| US4436478A (en) * | 1981-07-27 | 1984-03-13 | The West Company | Apparatus for making molded articles |
Non-Patent Citations (1)
| Title |
|---|
| PATENT ABSTRACTS OF JAPAN ; vol. 12, no. 222 (M-712)(3069) 24 June 1988 ; & JP,A,63 019 215 ( JAPAN STEEL WORKS LTD ) 27 January 1988 see abstract * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005099997A1 (en) * | 2004-04-16 | 2005-10-27 | France (Qld) Pty Ltd | Vacuum form encapsulated articles |
Also Published As
| Publication number | Publication date |
|---|---|
| DE9017905U1 (en) | 1992-11-05 |
| EP0563061A1 (en) | 1993-10-06 |
| KR930702143A (en) | 1993-09-08 |
| DE4037675C2 (en) | 1993-01-21 |
| DE4037675A1 (en) | 1992-06-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1096087C (en) | Coaxial cable | |
| AU736601B2 (en) | Coaxial cable and method of making same | |
| CA1145824A (en) | Cable splice case with segmented end plates | |
| CA2280291A1 (en) | Electrical cable and method and equipment for the obtention thereof | |
| CA1192012A (en) | Production of dimensionally recoverable articles | |
| WO1992009420A1 (en) | Process and apparatus for applying a plastics enclosure to surfaces that are to be protected | |
| EP0644639B1 (en) | Automatic waterproofing apparatus for joint of electric wires | |
| WO1995000364A1 (en) | Arrangement for energy distribution in a limited space | |
| KR930002984B1 (en) | Method and apparatus for waterproofing cable core of communication cable in longitudinal direction | |
| US20170103831A1 (en) | Methods for Manufacturing an Insulated Busbar | |
| KR100480657B1 (en) | Method for producing a flexible cable harness | |
| US3381082A (en) | Cable splicers and the like | |
| IL84715A0 (en) | Process and apparatus for continuously manufacturing composite articles of constant section comprising a core and an outer cover,and such composite articles | |
| EP1498910A2 (en) | Method for coating and/or partial overmoulding of flexible long products. | |
| FI78798C (en) | FOERFARANDE FOER FRAMSTAELLNING AV ETT AENDSLUTSTYCKE FOER EN TRYCKTAET KABEL. | |
| DE19960266A1 (en) | Making shrink hose connection involves subjecting hose section to high frequency alternating electromagnetic field for short time to heat dielectrically and shrink onto conductor | |
| CA2227451A1 (en) | Method and apparatus for the manufacture of a corrugated enveloping pipe with a fluid pipe housed therein | |
| US4450317A (en) | High voltage, gas-filled electric cable with spacers between conductor and sheath | |
| GB2237519A (en) | Process for coating a metallic conductor with a layer of plastic | |
| DE3066220D1 (en) | Coaxial cable with composite insulation for telecommunication, method for applying the external insulation of such a cable and apparatus for carrying out this method | |
| CA2107038C (en) | Method of making electrical cable having a corrugated shield | |
| US3563820A (en) | Method of manufacturing a plastic insulated wire | |
| JPS6351125A (en) | Tape made of heat-shrinkable crosslinking synthetic resin and manufacture thereof | |
| CN111082278A (en) | Manufacturing process and structure of power cable T-shaped intermediate joint | |
| JPS6068509A (en) | Method of producing electric wire |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| AK | Designated states |
Kind code of ref document: A1 Designated state(s): KR MG US |
|
| AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AT BE CH DE DK ES FR GB GR IT LU NL SE |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 1991920407 Country of ref document: EP |
|
| WWP | Wipo information: published in national office |
Ref document number: 1991920407 Country of ref document: EP |
|
| WWW | Wipo information: withdrawn in national office |
Ref document number: 1991920407 Country of ref document: EP |