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WO1996016786A1 - Presse d'injection avec unite de fermeture a deux plateaux - Google Patents

Presse d'injection avec unite de fermeture a deux plateaux Download PDF

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Publication number
WO1996016786A1
WO1996016786A1 PCT/EP1995/004727 EP9504727W WO9616786A1 WO 1996016786 A1 WO1996016786 A1 WO 1996016786A1 EP 9504727 W EP9504727 W EP 9504727W WO 9616786 A1 WO9616786 A1 WO 9616786A1
Authority
WO
WIPO (PCT)
Prior art keywords
plate
injection molding
mold carrier
pressure
carrier plate
Prior art date
Application number
PCT/EP1995/004727
Other languages
German (de)
English (en)
Inventor
Herbert Pickel
Walter Wohlrab
Original Assignee
Krauss-Maffei Ag
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 Krauss-Maffei Ag filed Critical Krauss-Maffei Ag
Publication of WO1996016786A1 publication Critical patent/WO1996016786A1/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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/64—Mould opening, closing or clamping devices
    • B29C45/67—Mould opening, closing or clamping devices hydraulic
    • B29C45/6707—Mould opening, closing or clamping devices hydraulic without relative movement between the piston and the cylinder of the clamping device during the mould opening or closing movement

Definitions

  • the invention relates to an injection molding machine according to the preamble of claim 1.
  • An injection molding machine of this type is known from EP 0296410 B1, in which the closing force is introduced via the bars at the four corners of the movable platen, as a result of which the latter is exposed to considerable bending stress.
  • the movable platen is therefore very solid. However, this can only reduce the deflection of the platen, but it cannot be avoided that the remaining deflections will still have a negative effect, e.g. on the support of the movable platen on the machine frame via the slide shoe.
  • the movable platen is also loaded on one side by the mold half, which means that further bending loads and deformations have to be absorbed by the movable platen and the support.
  • the invention is therefore based on the object to largely eliminate the deflection of the movable platen or the fixed platen under clamping force and its negative effects in a two-platen injection molding machine.
  • the division of the movable or the fixed platen into a pressure plate and into a mold carrier plate enables a symmetrical force build-up in the mold carrier plate that largely excludes deformation due to the arrangement of several hydraulic devices (pressure pads). This can therefore be dimensioned relatively thin, since the bending lever arm, ie the distance from the spars to the respective hydraulic devices (pressure pads) is small and the deflection can be higher than with the solid, one-piece platen.
  • the movable platen is supported on the machine bed by the slide shoe attached to the mold carrier plate. The pressure plate thus acts as a counterbalancing torque to the tool part1 attached to the mold carrier plate.
  • the pressure plate also acts as a counterweight to compensate for the torque on the tool part attached to the mold carrier plate.
  • FIG. 1 is a side view of an injection molding machine with a closing pressure unit arranged in the movable platen
  • FIG. 2 shows the view according to section line III-III in FIG. 2,
  • Fig. 4 is a side view of an injection molding machine with a closing pressure unit arranged in the fixed platen and
  • FIG. 5 shows the side view of a modified injection molding machine according to FIG. 4.
  • FIG. 1 to 3 show an injection molding machine with a fixed platen 2 firmly connected to the machine frame 1, which is composed of four bars 3. These are detachably or lockably fastened in a movable platen 4 which is supported on the machine frame 1 in a longitudinally displaceable manner by means of a slide shoe 5.
  • the fixed platen 2 and the movable platen 4 are coupled to each other by means of rapid traverse cylinders 6 and 7.
  • the spars 3 are provided at the ends facing the fixed platen with teeth 8 with which the spars 3 are locked after penetrating the fixed platen 2 with the help of nut shells 9, 10.
  • the movable platen 4 consists of a pressure plate 11 and a mold carrier plate 12. In the pressure plate 11, the spars 3 are fastened, in which the mold carrier plate 12 is guided.
  • the mold carrier plate 12 is supported on the machine frame 1 via the slide shoe 5.
  • the fixed platen 2 and the movable platen 4 each carry a tool half 13 and 14.
  • the hydraulic device for generating the closing pressure is located between the mold carrier plate 12 and the pressure plate 11.
  • This consists of hydraulic pistons 15 arranged on the mold carrier plate 12, which are guided in hydraulic cylinders 16 formed in the pressure plate 11.
  • Four hydraulic cylinders are preferably arranged center-symmetrically to the spray axis S.
  • the pressure chambers of the hydraulic cylinders 16 are connected together to the hydraulic line 17 for the build-up of the closing pressure.
  • the hydraulic cylinders 16 have a large diameter, as a result of which a favorable force transmission from the pressure plate 11 to the mold carrier plate 12 is accomplished in accordance with a pressure cushion.
  • the hydraulic cylinders 16 are also connected to one another by lines 18, as a result of which uniform force transmission from the pressure plate 11 to the mold carrier plate 12 is ensured via all hydraulic cylinders 16.
  • Loose plungers 19 are fastened in the pressure plate 11. These penetrate the hydraulic pistons 15 and are guided in detaching cylinders 20 which are formed in the hydraulic pistons 15.
  • the fixed mold clamping plate 200 or 200 ' is composed of a pressure plate 110 or 110' and a mold carrier plate 120 or 120 ', the hydraulic devices for generating the Closing pressure are arranged.
  • the embodiments according to FIGS. 4 and 5 differ only in that in the embodiment according to FIG. 4 the pressure plate 110 and in the embodiment according to FIG. 5 the mold carrier plate 120 'is firmly connected to the machine bed 1. In the latter version, there is the advantage that the pressure plate 110 'balances the weight of the tool half (not shown) attached to the mold carrier plate 120'.
  • Hydraulic pistons 150 and 150 ' are arranged in the mold carrier plates 120 and 120', respectively, which in the pressure plate 110 and 110 'designed hydraulic cylinders 160 and 160'.
  • Loose plungers 190 and 190 ' are arranged in the pressure plates 110 and 110', respectively. These penetrate the hydraulic pistons 150 and 150 'and are guided in loose cylinders 20 which are formed in the hydraulic pistons 150 and 150'.
  • the bars 3 cannot be locked in the fixed mold mounting plate 200 or 200 'but in the movable mold mounting plate 40 or 40' in certain positions.
  • the locking mechanism consisting of toothings and nutshell shells which can be brought into engagement corresponds to the embodiment according to FIGS. 1 to 3.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

L'invention concerne une presse d'injection comprenant un plateau porte-outillage fixe (2), relié au bâti (1) de la presse et un plateau porte-outillage mobile (4) prenant appui sur le bâti de la presse et pouvant coulisser dans le sens longitudinal. Les longerons (3) sont fixés sur le plateau porte-outillage mobile (4) et peuvent être bloqués dans le plateau porte-outillage fixe (2). Cette presse présente des dispositifs conçus pour déplacer rapidement le plateau porte-outillage mobile et pour produire la pression de fermeture. L'invention vise à réduire la déformation du plateau porte-outillage mobile (4), lorsqu'il est soumis à la pression de fermeture, ainsi que les effets négatifs qui en résultent. A cet effet, le plateau porte-outillage mobile (4) est constitué d'une plaque de pression (11) et d'une plaque porte-outillage (12), les longerons étant fixés sur la plaque de pression (11), et la plaque porte-outillage étant guidée dans les longerons (3). Des dispositifs (15, 16) servant à produire la pression de fermeture sont placés entre la plaque de pression (11) et la plaque porte-outillage (12).
PCT/EP1995/004727 1994-12-02 1995-11-30 Presse d'injection avec unite de fermeture a deux plateaux WO1996016786A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP4443008.6 1994-12-02
DE4443008 1994-12-02

Publications (1)

Publication Number Publication Date
WO1996016786A1 true WO1996016786A1 (fr) 1996-06-06

Family

ID=6534790

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1995/004727 WO1996016786A1 (fr) 1994-12-02 1995-11-30 Presse d'injection avec unite de fermeture a deux plateaux

Country Status (2)

Country Link
DE (1) DE19544788A1 (fr)
WO (1) WO1996016786A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010036204A1 (de) 2010-09-02 2012-03-08 Robert Bosch Gmbh Schließeinheit

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005039691A1 (de) * 2005-04-19 2006-10-26 Gerhard Schubert Gmbh Pressantrieb
AT501948B1 (de) * 2005-04-21 2007-08-15 Engel Austria Gmbh Spritzgiesseinrichtung

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1159137B (de) * 1959-08-06 1963-12-12 Friedrich Stuebbe Formenschliessvorrichtung an Druck- und Spritzgiessmaschinen
GB998665A (en) * 1963-11-29 1965-07-21 Loewy Eng Co Ltd Mould-closing device for injection moulding machines
DE1278736B (de) * 1964-02-10 1968-09-26 Farrel Corp Formschliessvorrichtung fuer Spritzgiessmaschinen
FR1570981A (fr) * 1967-07-20 1969-06-13
US3833333A (en) * 1972-11-06 1974-09-03 G Britten Press construction
DE2819190A1 (de) * 1978-05-02 1979-11-15 Hendrik K Quere Formvorrichtung, insbesondere spritzgussmaschine
US4364720A (en) * 1980-12-22 1982-12-21 Ryder International Corporation Molding machine and system for accomodating a plurality of such machines
US4944669A (en) * 1989-03-03 1990-07-31 The Dow Chemical Company High tonnage rim press
JPH06142882A (ja) * 1992-11-13 1994-05-24 Ahresty Corp ダイカストマシン

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1729143C2 (de) * 1968-01-26 1973-01-04 Desma-Werke Gmbh, 2807 Uesen Spritzgieß- oder Vulkanisierform zum Herstellen von Formungen, insbesondere Schuhsohlen aus Kunststoffen oder Gummi mit Zellstruktur
DD268913A1 (de) * 1986-08-12 1989-06-14 Schwerin Plastmaschinen Schliessvorrichtung fuer eine spritzgiessmaschine
DE3861495D1 (de) * 1987-06-22 1991-02-14 Mitsubishi Heavy Ind Ltd Formschliessvorrichtung.
DE4104288C2 (de) * 1991-02-13 1994-08-04 Dieter H Prof Dr Ing Mueller Vorrichtung zur Biegekompensation an Formwerkzeugen

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1159137B (de) * 1959-08-06 1963-12-12 Friedrich Stuebbe Formenschliessvorrichtung an Druck- und Spritzgiessmaschinen
GB998665A (en) * 1963-11-29 1965-07-21 Loewy Eng Co Ltd Mould-closing device for injection moulding machines
DE1278736B (de) * 1964-02-10 1968-09-26 Farrel Corp Formschliessvorrichtung fuer Spritzgiessmaschinen
FR1570981A (fr) * 1967-07-20 1969-06-13
US3833333A (en) * 1972-11-06 1974-09-03 G Britten Press construction
DE2819190A1 (de) * 1978-05-02 1979-11-15 Hendrik K Quere Formvorrichtung, insbesondere spritzgussmaschine
US4364720A (en) * 1980-12-22 1982-12-21 Ryder International Corporation Molding machine and system for accomodating a plurality of such machines
US4944669A (en) * 1989-03-03 1990-07-31 The Dow Chemical Company High tonnage rim press
JPH06142882A (ja) * 1992-11-13 1994-05-24 Ahresty Corp ダイカストマシン

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 18, no. 449 (M - 1660) 22 August 1994 (1994-08-22) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010036204A1 (de) 2010-09-02 2012-03-08 Robert Bosch Gmbh Schließeinheit

Also Published As

Publication number Publication date
DE19544788A1 (de) 1996-06-05

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