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Method for monitoring mold breathing

A technology of mold breathing and clamping force, applied in the field of injection molding machines, to achieve the effect of low energy consumption and avoid damage

Active Publication Date: 2017-07-28
ENGEL AUSTRIA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the adjustment of tolerance for increased clamping force is completely intuitive for ordinary operators

Method used

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  • Method for monitoring mold breathing
  • Method for monitoring mold breathing

Examples

Experimental program
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Embodiment Construction

[0043] Determination of spring stiffness

[0044] The system consisting of the mold and the injection molding machine (curved rod, frame, beam, etc.) can basically be regarded as a pre-tensioned spring under the clamping force. In the present invention, the characteristics of the spring when mold clamping force is generated are measured. The mechanical properties of the machine can generally be considered to be known by the structure, while the properties of the total system are mainly influenced by the mould. In the simplest case, the force curve in this total system when the clamping force is generated can be determined by Hooke's law

[0045] F=k*x

[0046]describe. The force F here has a linear relationship to the deformation x caused by the clamping movement. The parameter k is referred to here as the spring constant. In general k can be considered here independent of the amount of expansion and contraction of the spring. Of course, it can alternatively be conside...

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Abstract

The invention relates to a method of monitoring mold breathing in a forming machine. A mold closing unit of the forming machine closes and generates mold closing force. At least one mold closing force change is measured during a material feeding process, and at least one characteristic quantity is determined by the mold closing force change.

Description

technical field [0001] The invention relates to a method for monitoring mold breathing in a molding machine and to an injection molding machine. Background technique [0002] Molding machines are generally understood here to mean injection molding machines, die-casting machines, presses and the like. For the sake of simplicity, the following text refers to injection molding machines, but the same applies to other molding machines. [0003] The mold and machine deform when the clamping force is generated by the clamping unit. During injection, due to the internal mold pressure in the mold cavity, expansion forces occur which lead to partial or complete restoration of the deformation caused by the clamping force. This effect under expansion force is known as mold breathing. On the one hand, this affects the volume of the mold cavity and, on the other hand, also the quality of the cast part. In addition, this breathing can open up gaps on the parting surface of the tool, in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C45/76B29C45/67
CPCB29C45/7653B29C45/80B29C2945/76016B29C2945/76381
Inventor G·皮尔韦恩
Owner ENGEL AUSTRIA