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Clamping device for an injection moulding machine

A technology of mold clamping device and injection molding machine, which is applied in the field of mold clamping device, and can solve the problems of unfavorable active cylinder, oil quantity converter, and increased energy consumption, etc.

Inactive Publication Date: 2007-05-16
DEMAG ERGOTECH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In addition, the series connection of master cylinder, oil volume changer and clamping cylinder is unfavorable from a dynamic point of view, because especially the oil column in the oil volume changer-clamping cylinder system has a tendency to vibrate
To reduce this tendency the system must effectively dampen vibrations, thus increasing energy consumption

Method used

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  • Clamping device for an injection moulding machine
  • Clamping device for an injection moulding machine
  • Clamping device for an injection moulding machine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0049] FIG. 1 shows a mold clamping device 1 for an injection molding machine, not shown in detail, with a movable mold clamping plate 2 which can run, for example, on beams and / or rails. A mold clamping piston 6 , which is movably mounted in the mold clamping cylinder 4 , is fastened to the mold clamping plate 2 . The clamping cylinder 4 is divided by the clamping piston 6 into a first piston chamber 8 and a second piston chamber 10, which are mutually sealed.

[0050] Furthermore, a compensating piston 18 is mounted on the movable mold clamping plate 2, which is movably mounted in a compensating cylinder 16 and forms therewith a compensating chamber 20, which in this configuration is an annular piston chamber. Clamping cylinder 4 and balancing cylinder 16 are connected to each other, or are installed on the same support, for example, on a support plate or a bed. A piston chamber 14 is formed inside the balancing cylinder 16 into which the active piston 12 enters. The activ...

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PUM

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Abstract

During the rapid closing movement of the movable platen (2), hydraulic oil is supplied to the smaller cylinder chamber (14), while at the same time oil is displaced from the balancing chamber (20) by the piston (18) of the balancing cylinder (16) and transferred smoothly to the larger piston chamber (8). To apply the closing force the connecting valve (30) is shut and oil is supplied from the pump to the larger closing force piston (6). An independent claim is included for the process of supplying oil to the piston chamber (8) of the closing force cylinder (4) by displacing it from a balancing chamber (20) of a balancing cylinder (16). Valves are provided to shut off the transfer connection, to reverse the process when retracting the platen and to provide drain connections to a tank as required. In an alternative design the rapid movement phase of the platen is provided by a screwed spindle.

Description

technical field [0001] The invention relates to a clamping device for an injection molding machine, comprising a movable mold clamping plate with a drive for moving the movable mold clamping plate in at least one direction, at least one clamping cylinder and a A clamping piston movably mounted therein and at least one compensating cylinder and a compensating piston movably mounted therein. Background technique [0002] Clamping devices for injection molding machines are usually used to close a so-called mold whose halves are mounted on a mold clamping plate (Formaufspannplatte). . In the closed state, that is to say when the clamping plates of the mold are closed, the mold halves form a cavity into which eg thermoplastic material can be injected under application of closing pressure in order to form a molded body. After the injected material has solidified or hardened, the mold halves are opened, ie the clamping plates of the mold are moved apart and the finished molded bo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C45/67
CPCB29C45/67B29C2045/6785
Inventor M·坎特尔K·亨克
Owner DEMAG ERGOTECH GMBH