WO1993025368A1 - Procede de reglage en hauteur des outils de systemes de fermeture a genouillere, notamment sur les presses d'injection - Google Patents

Procede de reglage en hauteur des outils de systemes de fermeture a genouillere, notamment sur les presses d'injection Download PDF

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Publication number
WO1993025368A1
WO1993025368A1 PCT/DE1993/000492 DE9300492W WO9325368A1 WO 1993025368 A1 WO1993025368 A1 WO 1993025368A1 DE 9300492 W DE9300492 W DE 9300492W WO 9325368 A1 WO9325368 A1 WO 9325368A1
Authority
WO
WIPO (PCT)
Prior art keywords
end plate
tool
lever mechanism
toggle lever
bent lever
Prior art date
Application number
PCT/DE1993/000492
Other languages
German (de)
English (en)
Inventor
Herbert Thoma
Ralph Keitel
Original Assignee
Klöckner Ferromatik Desma 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 Klöckner Ferromatik Desma Gmbh filed Critical Klöckner Ferromatik Desma Gmbh
Publication of WO1993025368A1 publication Critical patent/WO1993025368A1/fr

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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
    • B29C45/1751—Adjustment means allowing the use of moulds of different thicknesses

Definitions

  • the invention relates to a method for tool height adjustment of toggle lever locking systems, in particular on injection molding machines according to the preamble of patent claim 1.
  • the invention further relates to a device for carrying out this method.
  • a toggle lever transmission has the disadvantage that it has an upper dead center predetermined by its mechanics. In order to be able to use different tool dimensions on the same machine, it is necessary to adjust the position of the toggle lever system to the different tool heights so that the required locking force is guaranteed when the tool is closed and the strut elongation that occurs when locking against the respective injection pressure ( an elastic effect) is compensated.
  • the invention solves this problem in that first the end plate is retracted by adjusting the tool height and also the mold mounting plate by the toggle lever mechanism, whereupon the new tool is installed, after which the toggle lever mechanism is extended to the maximum extended position and the tool is closed by moving the end plate is what follows as the next process step, the retraction of the platen with the help of the toggle lever mechanism by the amount of a predetermined preload, which corresponds to the compensation of the bar extension and / or the required mold locking force, whereupon the tool is closed again by moving the end plate , both the movement of the end plate and that of the toggle lever mechanism being effected via an electric motor drive with intermediate gears.
  • the advantage of the method according to the invention lies in the fact that the electromotive drive and the purely mechanical drive units allow the adjustment to be carried out fully automatically, with the constant geometric conditions after initial prestressing until an equilibrium state has been established (due to the different thermal expansions of the Tool on the one hand and the spars on the other hand) the position of the end plate and the mold mounting plate associated therewith (via the toggle lever) only need to be readjusted slightly.
  • the control of the entire setting process can be computerized through the use of the electric motors, so that once the prestressing for each tool has been determined, only the parameters of this tool have to be entered and the method runs automatically.
  • the measure for the preload can be calculated relatively precisely, since these are elastic cases and therefore the force is proportional to the path.
  • While the electrical energy of the electric motor is preferably transmitted to the toggle lever mechanism via a spindle (or a toothed rack), for movement of the end plate it is transmitted to a ring gear arranged centrally on the end plate, which meshes with four gear wheels arranged on the bars.
  • a spindle or a toothed rack
  • movement nuts are integrated in the end plate, which run on the threads of the spars and whose movement is synchronized by the sprocket-gear combination.
  • the synchronization can also be done with the help of a drive on four sprockets via a chain.
  • the automatic interplay of end plate movement and toggle lever movement thus immediately results in the required precise setting for every tool height.
  • Figures 1 to 4 show the individual process steps for setting the required tool height.
  • an electrically operated locking system is shown schematically in side view.
  • a fixed mold mounting plate 1 also referred to as a nozzle plate, and a displaceable mold mounting plate 2.
  • the two halves 3 and 4 of a tool are attached to the plates and, when closed (FIG. 2), enclose a mold cavity 5.
  • Both Formaufspan ⁇ platten 1 and 2 are arranged on four spars 6 and 7, of which only the front can be seen, the platen 2 is slidably guided on the spars 6 and 7.
  • An end plate 8 - also called a pull plate - is also slidably guided on the bars 6 and 7.
  • Mold clamping plate 2 and end plate 8 are connected to each other by a conventional toggle lever 9.
  • the toggle lever mechanism 9 and thus the mold mounting plate 2 are moved by an electric motor 10 which drives a spindle or rack 11 Likewise driven by an electric motor (not shown separately) is a toothed ring 12 arranged on the end plate 8, the teeth of which mesh with toothed wheels 13 and 14 arranged on the bars 6, 7, of which only the front ones can also be seen.
  • Four movement nuts are integrated in the end plate 8, which run on trapezoidal threads of the spars, for example, and whose movement is synchronized by the combination of ring gear 12 and toothed wheels 13, 14.
  • FIG. 2 shows the state in which the toggle lever mechanism 9 has been moved in the maximum extended position - that is, to its top dead center - and then the mold halves 3 and 4 by moving the end plate 8 and thus - via the elongated toggle lever mechanism 9 - the platen 2 have been brought into the closed position.
  • FIG. 3 shows the state in which the toggle lever mechanism 9 has been moved back from the top dead center position by an amount that corresponds to a predetermined preload or a predetermined closing force.
  • the pretension corresponds to the compensation of the elastic beam extension which occurs when the mold is held against a certain injection pressure with a certain closing pressure.

Abstract

L'invention concerne un procédé de réglage en hauteur des outils de systèmes de fermeture à genouillère, notamment sur les presses d'injection actionnées par un moteur électrique et comportant une unité de fermeture du moule à genouillère. La plaque d'extrémité (8) et le plateau porte-outillage (2) actionné par le mécanisme à genouillère (9) sont tout d'abord déplacés à une distance suffisante du plateau porte-outillage fixe (1). C'est dans cette position que le nouvel outil est monté. Ensuite, le mécanisme à genouillère (9) est étiré au maximum et l'outil est fermé à l'aide de la plaque d'extrémité (8). Puis le mécanisme à genouillère (9) est ramené à un écartement déterminé, ce qui permet à l'outil d'avoir une ouverture donnée. Pour finir, l'outil est à nouveau fermé sous l'effet du déplacement de la plaque d'extrémité (8), la géométrie du mécanisme à genouillère (9) demeurant stationnaire.
PCT/DE1993/000492 1992-06-09 1993-06-08 Procede de reglage en hauteur des outils de systemes de fermeture a genouillere, notamment sur les presses d'injection WO1993025368A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DEP4218823.7 1992-06-09
DE4218823 1992-06-09
DE4318715 1993-06-07
DEP4318715.3 1993-06-07

Publications (1)

Publication Number Publication Date
WO1993025368A1 true WO1993025368A1 (fr) 1993-12-23

Family

ID=25915513

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1993/000492 WO1993025368A1 (fr) 1992-06-09 1993-06-08 Procede de reglage en hauteur des outils de systemes de fermeture a genouillere, notamment sur les presses d'injection

Country Status (1)

Country Link
WO (1) WO1993025368A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1584445A1 (fr) * 2004-03-29 2005-10-12 Fanuc Ltd Dispositif de réglage de la force de serrage d'un moule dans une presse à mouler avec un système de fermeture à genouillère
DE102014012753A1 (de) 2013-08-30 2015-03-05 Engel Austria Gmbh Spindeleinheit für eine Formgebungsmaschine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2020053A1 (de) * 1970-04-24 1971-11-04 Krauss Maffei Ag Spritzgiessmaschine mit automatischer Einstellung der Formeinbauhoehe
DE2354200A1 (de) * 1972-11-01 1974-05-16 Litton Industries Inc Verfahren und einrichtung fuer spritzgussmaschinen
DE2949603A1 (de) * 1979-12-10 1981-03-12 Eisenwerk Hensel Bayreuth Dipl.-Ing. Burkhardt Gmbh, 8580 Bayreuth Schliessteil mit kniehebelsystem, insbesondere fuer druckgiessmaschinen.
US4301100A (en) * 1979-10-01 1981-11-17 Package Machinery Company Method and apparatus for setting a clamping load

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2020053A1 (de) * 1970-04-24 1971-11-04 Krauss Maffei Ag Spritzgiessmaschine mit automatischer Einstellung der Formeinbauhoehe
DE2354200A1 (de) * 1972-11-01 1974-05-16 Litton Industries Inc Verfahren und einrichtung fuer spritzgussmaschinen
US4301100A (en) * 1979-10-01 1981-11-17 Package Machinery Company Method and apparatus for setting a clamping load
DE2949603A1 (de) * 1979-12-10 1981-03-12 Eisenwerk Hensel Bayreuth Dipl.-Ing. Burkhardt Gmbh, 8580 Bayreuth Schliessteil mit kniehebelsystem, insbesondere fuer druckgiessmaschinen.

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 17, no. 12 (M-1351)11. Januar 1993 *
PATENT ABSTRACTS OF JAPAN vol. 4, no. 57 (M-9)(539) 26. April 1980 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1584445A1 (fr) * 2004-03-29 2005-10-12 Fanuc Ltd Dispositif de réglage de la force de serrage d'un moule dans une presse à mouler avec un système de fermeture à genouillère
US7210918B2 (en) 2004-03-29 2007-05-01 Fanuc Ltd Mold clamping force adjustment device of toggle type injection molding machine
DE102014012753A1 (de) 2013-08-30 2015-03-05 Engel Austria Gmbh Spindeleinheit für eine Formgebungsmaschine
DE102014012753B4 (de) * 2013-08-30 2020-02-06 Engel Austria Gmbh Spindeleinheit, Spritzeinheit und Schließeinheit für eine Formgebungsmaschine, sowie Formgebungsmaschine

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