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Ejection device for injection moulding machine

A technology of injection molding machine and ejector device, applied in the field of injection molding machine, can solve problems such as difficult loosening, and achieve the effect of simple monitoring process

Active Publication Date: 2013-10-23
ENGEL AUSTRIA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when the injection-moulded parts are cooling, it can happen that these injection-moulded parts are shrunk onto the at least one ejector pin, so that the injection-moulded parts can only be released from the at least one ejector pin with difficulty.

Method used

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  • Ejection device for injection moulding machine
  • Ejection device for injection moulding machine

Examples

Experimental program
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Embodiment Construction

[0020] In the exemplary embodiment shown, three ejector pins 2 are fastened to a first stop surface 1 . Via the power train of the drive 4 of the ejector (here comprising electric motor, belt drive, screw drive and ejector rod), the first stop surface 1 is formed by figure 1 The position shown in , furthest from the second stop surface 3 can be moved to the stop with the second stop surface 3 and also slightly beyond the mechanical stop due to the elasticity of the components involved .

[0021] figure 2 The resulting force F (spring deformation curve) is shown graphically (solid line) with respect to the travel distance x. The position x=0 here corresponds to the position of the first stop surface 1 at figure 1 The location shown in . position x=x A This corresponds to the position of the first stop surface 1 when it stops against the second stop surface 3 . Use x=x s Indicates the maximum reachable position of the first stop surface 1 ( figure 1 in the rightmost pos...

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Abstract

The invention relates to an ejection device for an injection moulding machine; the ejection device comprises at least one ejection pin (2) arranged on a first stop surface (1), a second stop surface (3), and a drive device (4) used for moving the first stop surface (1) relative to the second stop surface (3); a monitoring device (5) having an electronic memory is provided; a spring deformation curve (F(x)) representing the mechanical features of the ejection device is stored in the electronic memory; the spring deformation curve is a function (F) of a movement stroke (x) of the first stop surface (1) relative to the second stop surface (3); the monitoring device (5) is employed to monitor the movement of the first stop surface (1) relative to the second stop surface (3) under a condition the spring deformation curve (F(x)) is considered.

Description

technical field [0001] The invention relates to an ejector device for an injection molding machine having the features of the preamble of claim 1 and to an injection molding machine with such an ejector device. Background technique [0002] The ejection device is used to reliably remove from one of the mold halves the injection molded part still on this mold half after opening the mold halves of the injection molding machine. However, when the injection-molded parts are cooling, it can happen that these are shrink-fitted onto the at least one ejector pin, so that the injection-molded parts can only be detached from the at least one ejector pin with difficulty. In this case, the first stop surface is moved towards the injection molding tool at a high speed, so that the first stop surface hits the second stop surface, which causes the at least one The ejector pin stops suddenly. As a result, the injection molded part falls off the at least one ejector pin due to the high acc...

Claims

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Application Information

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IPC IPC(8): B29C45/42
CPCB29C2945/76943B29C45/76B29C45/7626B29C2945/76247B29C45/40B29C2945/76418B29C2945/76933B29C2045/4063B29C2945/76083
Inventor B·汉内斯A·埃林格尔
Owner ENGEL AUSTRIA
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