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WO1998016367A2 - Dispositif pour maintenir des preformes et machine de soufflage pour mouler des recipients - Google Patents

Dispositif pour maintenir des preformes et machine de soufflage pour mouler des recipients Download PDF

Info

Publication number
WO1998016367A2
WO1998016367A2 PCT/DE1997/002144 DE9702144W WO9816367A2 WO 1998016367 A2 WO1998016367 A2 WO 1998016367A2 DE 9702144 W DE9702144 W DE 9702144W WO 9816367 A2 WO9816367 A2 WO 9816367A2
Authority
WO
WIPO (PCT)
Prior art keywords
support body
specific weight
secondary part
transport
preforms
Prior art date
Application number
PCT/DE1997/002144
Other languages
German (de)
English (en)
Other versions
WO1998016367A3 (fr
Inventor
Ronald Weiss
Original Assignee
Krupp Corpoplast Maschinenbau Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Krupp Corpoplast Maschinenbau Gmbh filed Critical Krupp Corpoplast Maschinenbau Gmbh
Priority to AU46989/97A priority Critical patent/AU4698997A/en
Publication of WO1998016367A2 publication Critical patent/WO1998016367A2/fr
Publication of WO1998016367A3 publication Critical patent/WO1998016367A3/fr

Links

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
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/4205—Handling means, e.g. transfer, loading or discharging means
    • B29C49/42093—Transporting apparatus, e.g. slides, wheels or conveyors
    • 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
    • B29C43/04—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles using movable moulds
    • B29C43/06—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles using movable moulds continuously movable in one direction, e.g. mounted on chains, belts
    • B29C43/08—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles using movable moulds continuously movable in one direction, e.g. mounted on chains, belts with circular movement, e.g. mounted on rolls, turntables
    • 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
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/64—Heating or cooling preforms, parisons or blown articles
    • B29C49/68—Ovens specially adapted for heating preforms or parisons
    • B29C49/685—Rotating the preform in relation to heating means

Definitions

  • the invention relates to a device for holding preforms, which has an essentially sleeve-shaped support body and in which at least one rotary bearing is arranged in the region of the support body.
  • the invention also relates to a device for blow molding thermoplastic containers, which has at least one blow molding station provided with a blow mold and a stretching device and in which an essentially sleeve-shaped support body is provided for transporting preforms to be inflated.
  • a support body is described, for example, in DE-OS 43 40 291 and serves to supply preforms made of a thermoplastic material, for example preforms made of PET (polyethylene terephthalate), to different processing stations within a blow molding machine.
  • a blowing machine has a heating device and a blowing device, in the area of which the pre-tempered preform is expanded into a container by biaxial orientation. The expansion takes place with the aid of compressed air which is introduced into the preform to be expanded.
  • the procedural sequence for such an expansion of the preform is also explained in DE-OS 43 40 291.
  • support bodies for handling the preforms has the advantage that the preforms can be attached with their mouths to a coupling element of the support body and that during the further transport movements the transport elements used only act on the support body and not directly on the preform. This prevents damage and deformation of the preform, which is soft due to the heating. In addition, material removal through direct-acting gripping elements, which could lead to dust formation, for example, is avoided.
  • the known supporting bodies have a high mechanical strength and, as a result, are highly reliable and have a long service life. Especially at using rotating transport devices, however, centrifugal forces occur which impair the handling speed. In addition, when the carrying bodies are transported along guide devices which are arranged in the region of the blow molding machine, signs of wear appear with increasing transport speed.
  • the object of the present invention is to construct a device for holding preforms of the type mentioned in the introduction in such a way that handling is improved.
  • the support body is formed from at least one primary part and at least one secondary part and that the secondary part has a specific weight that is less than the specific weight of steel.
  • Another object of the present invention is to design a device for blow molding of the type mentioned in the introduction in such a way that wear caused by the transport movement of the support body is further minimized.
  • guide elements are arranged along at least part of a transport path of the support body, which are made of a harder material than the support body in the region of a guide surface which is provided for contact with the guide elements.
  • the construction weight can be reduced considerably, so that lower inertial forces occur on the one hand during braking and on the other hand it is also possible to provide higher transport speeds, in particular in the case of rotational movements in which centrifugal forces act on the holding devices.
  • the construction of the device for blow molding using the device for holding the preforms makes it possible to reduce wear that occurs, so that on the one hand a longer service life is made possible and that on the other hand contamination due to wear-related abrasion is avoided.
  • Easier handling can already be brought about by the fact that the specific weight of the secondary part is at least 10% less than the specific weight of steel.
  • a further increase in handling advantages can be achieved in that the specific weight of the secondary part is at least 20% less than the specific weight of steel.
  • the specific weight of the secondary part is at least 50% less than the specific weight of steel.
  • the specific weight of the secondary part is at least 80% less than the specific weight of steel.
  • the secondary part is made of plastic. To ensure sufficient thermal conductivity, it is also possible that the secondary part is made of light metal.
  • the secondary part has an extension in the direction of a longitudinal axis of the support body which is at least equal to the extension of a guide surface of the support body, which is provided as a contact surface for guide elements along a transport path of the support body.
  • the primary part have an expansion that approximately corresponds to the expansion of magnets for mounting the support body in the area of the heating wheel in the direction of the longitudinal axis of the support body.
  • An embodiment variant with high stability is provided in that the secondary part is received as an insert part by the primary part.
  • a particularly strong reduction in inertial forces can be achieved in that the primary part is received as an insert in the secondary part.
  • the transport mandrel has two rotary bearings.
  • the support body be provided with at least two secondary parts made of plastic.
  • a low overall weight can be achieved in that the support body has a basic structure made of plastic and is provided with metal inserts.
  • the support body have at least one toothing.
  • a largely standardized mounting of geometrically differently dimensioned preforms is supported in that the support body is provided with a product element designed as a function of the product.
  • a sealing ring be arranged in the transition area of the attachment element in the support body.
  • trajectories are also supported in that the support body has a guide sleeve for aligning a stretching rod which is inserted into the container to be formed by the transport mandrel.
  • 1 is a schematic representation of a device for blow molding thermoplastic containers with heating wheel and blowing wheel
  • 2 shows a cross section through a device for holding preforms
  • FIG. 4 shows a cross section through a further modified device for holding preforms
  • Fig. 5 shows a further modified variant of the device for holding preforms
  • Fig. 6 is a schematic diagram illustrating a contact of the device for holding preforms with a guide element in the area of the device for blow molding thermoplastic containers.
  • the device for blow molding containers has a heating wheel (1) and a blowing wheel (2).
  • Preforms to be processed are fed via a feed rail (3) into the area of a turning device (4) and transported by transfer wheels (5,6,7) into the area of the heating wheel (1).
  • the preforms are guided hanging with their mouths oriented upwards along the feed rail (1) and rotated by 180 ° by the turning device (4).
  • Heating in the area of the heating wheel (1) takes place in such a way that the preforms are oriented upright with their mouths facing downward.
  • Heating devices (8) and cooling devices (9) are arranged along the heating wheel (1).
  • a cooling device (9) is preferably arranged between two heating devices (8).
  • the heating devices (8) heat the preforms with the aid of IR radiation and the cooling devices (9) blow air onto the surfaces of the heated preforms for surface cooling.
  • the tempered preforms are transported from a transfer wheel (10) to the blowing wheel (2) and used here in molds (11) which are held by blowing stations (12).
  • the blowing stations (12) can be opened and closed like a book.
  • completely blown containers are removed from the blowing station (12) and fed to a delivery section (15) by transfer wheels (13, 6, 14).
  • a further turning device between the blowing wheel (2) and the discharge section (15) so that the blown containers hang in the area of the Output route (15) can be transported.
  • Fig. 2 shows the arrangement of a transport mandrel (16) in the area of the heating wheel (1).
  • the heating wheel (1) is provided with mandrel holders (17), in the area of which magnets (18, 19) are arranged in order to hold the transport mandrels (16).
  • magnets (18, 19) are arranged in order to hold the transport mandrels (16).
  • the transport mandrels (16) form the device for holding the preforms.
  • the transport mandrel (16) is provided with a support body (20) which is profiled on the outside and is essentially sleeve-shaped.
  • the support body holds rotary bearings (21, 22) and can be provided with teeth (23).
  • the rotary bearings (21, 22) can be designed, for example, as roller bearings or as ball bearings that roll in the mandrel holder (17). It is also conceivable in the area of the mandrel holder
  • the magnets (18, 19) are arranged within the mandrel receptacles (17) in such a way that an air gap between the magnets (18, 19) and associated contact segments (24, 25) of the transport mandrel (16) remains. This ensures that there is only direct material contact between the outer surfaces of the rotary bearings (21, 22) and the mandrel holder (17). This allows the transport mandrel (16) to move freely within the rotary bearing (21, 22) relative to the mandrel holder (17) despite the magnetic holder.
  • the support body (20) opens vertically upwards into an attachment element (26) which has a dimensioning which is selected as a function of the preform to be transported.
  • the further area of the transport mandrel (16), however, is dimensioned in a standardized manner.
  • the attachment element (26) can be made of steel, for example, and be provided with a sealing ring (27) against which the mouth area of an attached preform is guided.
  • nitride the top element (26) in the surface area for example with titanium nitride.
  • Other treatments to improve the surface quality, especially smoothness, hardness or corrosion resistance, are also possible.
  • connection element (28) is provided, facing away from the plug-on element (26), through which compressed air is fed in to expand the preform into an interior (29) of the transport mandrel (16).
  • guide elements (30) are arranged in the area of the blow molding machine, depending on their positioning at different heights can support the transport mandrel (16) against lateral tilting.
  • the guide elements (30) can also support the removal of the transport mandrels (16) from the mandrel receptacles (17).
  • Fig. 2 three different positions for guide elements (30) are entered.
  • the guide elements (30) can be made of a plastic, for example of POM.
  • secondary parts (31) of the support body (20), which are formed from a plastic it is expedient that Guide elements (30) made of metal, for example made of hardened steel.
  • the secondary parts (31) have a ring shape and are arranged in the region of the transport mandrel (16) in such a way that contact regions which can come into contact with the guide elements (30) are covered. If the secondary parts (31) are made of a soft material, for example plastic, and if the guide elements (30) are made of a hard material, for example steel, contact points between the transport mandrel (16) and the guide elements (30) are due to the Rotational mobility of the transport mandrel (16) statistically distributed over the circumference of the secondary parts (31). Contact with the guide elements (30) always takes place in the same area of the guide element (30). The advantage can thus be achieved that the contact zone varies statistically in the region of the further component and that there is only a locally constant contact zone in the region of the harder component. Compared to a reverse implementation, this can significantly reduce wear.
  • Fig. 3 shows an embodiment in which the support body (20) is formed from a material which has a lower specific weight relative to iron or steel.
  • a material which has a lower specific weight relative to iron or steel For example, it is intended to use plastic or aluminum.
  • Typical specific weights are 7.86 kg / 1 for iron or steel, 2.70 kg / 1 for aluminum and 0.9 to 2.1 kg / 1 for plastics.
  • the connecting element (28) can also be made, in whole or in part, of a material that is lighter than steel, for example Plastic.
  • a material that is lighter than steel for example Plastic.
  • the contact segments (24, 25) are formed from a non-magnetic material, for example from plastic, it is in particular contemplated to embed magnetizable parts in order to be able to apply sufficiently strong holding forces through the magnets (18, 19).
  • an embodiment variant is also shown in thin lines in FIG. 4, in which the support body (20) is formed in two parts and is joined by the combination of an internal thread (32) and an external thread (33). Sealing is ensured by sealing rings (34).
  • the contact segment (24) can be made in one piece with the supporting body (20).
  • a two-part embodiment of the support body (20) is also illustrated, in which the connecting element (28) in one piece with a lower region of the support body (20) and an upper contact segment (35) in one piece with an upper Area of the support body (20) is connected.
  • This embodiment enables the product-dependent attachment element (26) to be geometrically significantly reduced in size, so that further standardization of the transport mandrel (16) can be achieved.
  • iron parts in plastic or plastic parts can in turn be embedded in a supporting body made of iron to enable a magnetic holder.
  • other material combinations are conceivable.
  • Fig. 6 shows the arrangement of the transport mandrel (16) within the device for blow molding containers.
  • the transport mandrel (16) here consists of a primary part (36) made of metal and a secondary part (31) made of plastic.
  • the transport mandrel (16) can rotate in the direction of rotation (37) with respect to a center line (38) and is moved past a guide element (40) in the transport direction (39).
  • the guide element (40) is formed from a material that is harder than the material of the secondary part (31). For example, steel can be used.
  • the transport mandrel (16) When moving in the transport direction (39), the transport mandrel (16) first strikes the guide element (40) in a collecting area (41) which is widened like a funnel. Due to the predetermined transport movements, the same point of impact (42) always results in the area of the collecting area (41). In the area of the transport mandrel (16), the corresponding counterpart (43) is due to the rotational movement of the transport mandrel (16), the corresponding counterpart (43) is based on the rotational movement of the Transport mandrel (16) distributed statistically along an outer circumference (44). The further transport mandrel following the illustrated transport mandrel (16) thus hits the guide element (40) again exactly at the same point of impact (42).
  • the transport mandrel (16) shown strikes another counterpart (43) in the area of its outer circumference (44) in a subsequent guide element (40). It can also be assumed statistically that the transport mandrel (16) assumes a different position from the rotational position shown after the end of its orbit and when it hits the guide element (40) again.
  • the transport mandrel (16) is intended to construct the transport mandrel (16) by means of the material pairings provided in such a way that there is a pressure stability of at least 40 bar.
  • the choice of materials also ensures that temperature resistance up to a temperature of at least 80 ° C is ensured.
  • the transport mandrel (16) is made of plastic in certain areas, it is also possible to carry out at least partial coating or vapor deposition with metal. In this way, on the one hand, heating can be avoided by reflection, and, in addition, heat dissipation is supported when heat is absorbed. Metal vapor deposition also prevents dust accumulation, since electrostatic charges are dissipated.
  • connecting element (28) is made of a relatively soft material
  • a lower lead-in area be formed by an insert made of a firmer material so that impact stresses caused by pneumatic connecting elements can be tolerated.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Abstract

L'invention concerne un dispositif pour maintenir des préformes, comportant un corps porteur essentiellement sous forme de manchon. Dans la zone du corps porteur, il est prévu au moins un palier de rotation. Le corps porteur comprend au moins une partie primaire et au moins une partie secondaire. Cette dernière a un poids spécifique inférieur au poids spécifique de l'acier. Ce dispositif pour maintenir des préformes peut s'utiliser dans la zone d'un dispositif de moulage par soufflage de récipients thermoplastiques. Des appariements judicieux de matériaux dans la zone de surface à sollicitation mutuelle permettent de réduire l'usure.
PCT/DE1997/002144 1996-10-11 1997-09-20 Dispositif pour maintenir des preformes et machine de soufflage pour mouler des recipients WO1998016367A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU46989/97A AU4698997A (en) 1996-10-11 1997-09-20 Device for holding preforms and blower machine for shaping containers

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19641943A DE19641943B4 (de) 1996-10-11 1996-10-11 Vorrichtung zur Halterung von Vorformlingen sowie Blasmaschine zur Formung von Behältern
DE19641943.3 1996-10-11

Publications (2)

Publication Number Publication Date
WO1998016367A2 true WO1998016367A2 (fr) 1998-04-23
WO1998016367A3 WO1998016367A3 (fr) 1998-09-17

Family

ID=7808461

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1997/002144 WO1998016367A2 (fr) 1996-10-11 1997-09-20 Dispositif pour maintenir des preformes et machine de soufflage pour mouler des recipients

Country Status (3)

Country Link
AU (1) AU4698997A (fr)
DE (1) DE19641943B4 (fr)
WO (1) WO1998016367A2 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT408326B (de) * 1998-09-24 2001-10-25 Boehler Miller Messer Und Saeg Schneideinrichtung mit distanziert aufgespanntem kreisschermesser
DE10035572A1 (de) * 2000-07-21 2002-01-31 Krupp Corpoplast Maschb Gmbh Verfahren und Vorrichtung zum Transport von Tragelementen
DE10131836A1 (de) * 2001-06-30 2003-01-23 Sig Corpoplast Gmbh & Co Kg Vorrichtung zum Transport von Produkten
DE102005059057A1 (de) * 2005-12-08 2007-06-21 Sig Technology Ltd. Verfahren und Vorrichtung zur Blasformung von Behältern
DE102013019169A1 (de) 2013-11-18 2015-05-21 Khs Gmbh Vorrichtung und Verfahren zur Herstellung steriler Behälter

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2352926A1 (de) * 1973-10-22 1975-04-24 Heidenreich & Harbeck Gmbh Verfahren und vorrichtung zum erwaermen eines werkstueckes aus kunststoff
JPS6045045B2 (ja) * 1977-12-27 1985-10-07 株式会社吉野工業所 延伸ブロ−成形装置
JPS5566606A (en) * 1978-11-10 1980-05-20 Mazda Motor Corp Rocker arm made of composite material
JPS5590318A (en) * 1978-12-28 1980-07-08 Yoshino Kogyosho Co Ltd Heat rolling blow molding apparatus
JPS5645021A (en) * 1979-09-19 1981-04-24 Hitachi Ltd Moving apparatus
DE3171687D1 (en) * 1980-05-24 1985-09-12 Toyo Seikan Kaisha Ltd Apparatus for cooling a transfer mandrel
US4723906A (en) * 1986-06-02 1988-02-09 Cincinnati Milacron Inc. Blow molding apparatus
FR2619048B1 (fr) * 1987-08-07 1990-01-19 Sidel Sa Dispositif pour le traitement thermique du col de preformes
US4790741A (en) * 1987-08-07 1988-12-13 Toyo Seikan Kaisha, Ltd. Apparatus for preparing heat-set plastic hollow vessel
DE3910293A1 (de) * 1989-03-30 1990-10-04 Bekum Maschf Gmbh Vorrichtung zum blasformen vorgefertigter vorformlinge
DE4212583A1 (de) * 1992-04-15 1993-10-21 Krupp Corpoplast Masch Vorrichtung zur Blasformung
DE4340291A1 (de) * 1993-11-26 1995-06-01 Krupp Corpoplast Masch Mehrfachnutzung von Blasluft
JPH07172508A (ja) * 1993-12-17 1995-07-11 Murata Mach Ltd スタッカークレーン用ガイドレール
FR2720679A1 (fr) * 1994-06-03 1995-12-08 Sidel Sa Bras de transfert et machine de fabrication de bouteilles à partir de préforme utilisant un tel bras.
FR2720681A1 (fr) * 1994-06-03 1995-12-08 Sidel Sa Tournette et machine de fabrication de récipients à partir de préformes utilisant au moins une telle tournette.

Also Published As

Publication number Publication date
WO1998016367A3 (fr) 1998-09-17
DE19641943A1 (de) 1998-04-16
AU4698997A (en) 1998-05-11
DE19641943B4 (de) 2008-04-10

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