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Mold-clamping control method for injection molding machine

A technology of injection molding machine and control method, applied in the field of mold clamping control, which can solve the problems of incoherent operation, difficulty in setting torque limit value, error detection, etc.

Active Publication Date: 2004-12-01
NISSEI PLASTIC IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, it is difficult for the user to set the torque limit value due to various factors that must be considered.
In particular, since the user places a high value on the tooling, he / she tends to set the torque limit lower, potentially causing choppy operation and false detections

Method used

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  • Mold-clamping control method for injection molding machine
  • Mold-clamping control method for injection molding machine
  • Mold-clamping control method for injection molding machine

Examples

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Embodiment Construction

[0026] Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The drawings illustrate embodiments and do not limit the scope of the invention. In order to clearly describe the present invention, detailed descriptions of well-known parts will be omitted.

[0027] First, the structure of an injection molding machine 1 to which the mold clamping control method in this embodiment can be applied will be described first with reference to FIGS. 7 and 8 .

[0028] The injection molding machine 1 shown in FIG. 7 includes a mold clamping unit 1c and injection unit 1i indicated by dotted lines. The mold clamping device 1c includes a fixed platen 3c and a driving base 3r which are separated from each other. The fixed platen 3c and the driving base 3r are fixedly mounted on an unshown machine base. Four connecting rods 4 extend between the fixed platen 3c and the drive base 3r. A movable platen 3m is movably mounted on the co...

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Abstract

A mold-clamping control method for an injection molding machine includes the steps of detecting a value of a monitor item in a monitor region predetermined in relation to a mold closing operation in a mold clamping step; performing emergency processing when the detected value exceeds a threshold value; and performing an automatic setting operation. This automatic setting operation includes the steps of periodically detecting the value of the monitor item in the monitor region at predetermined sampling intervals to thereby obtain detection values in sampling order; repeating the step of periodical detection for each of a predetermined number of shots; obtaining threshold values and torque limit values for individual places of sampling order, on the basis of the detection values, by use of predetermined arithmetic expressions; and storing the obtained threshold values and torque limit values for control use.

Description

technical field [0001] The present invention relates to a mold clamping control method for an injection molding machine, which is particularly suitable for detecting foreign objects caught between a movable mold and a fixed mold during a mold clamping step. Background technique [0002] Generally, in the field of injection molding machines designed to transmit reciprocating motion generated by a driving device including a servo motor and a ball screw mechanism to a movable platen through a toggle mechanism, a foreign object detection method is known for use in accordance with The movement of the movable platen in the mold closing direction detects a foreign object (such as a molding) clamped between the movable mold and the fixed mold (for example, see Japanese Patent Application Laid-Open No. (kokai) No. 2002-172670). [0003] This patent discloses a foreign object detection method for an injection molding machine, comprising the steps of: detecting a physical value related...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C45/76B29C45/84
CPCB29C2945/76943B29C2945/76595B29C2945/76568B29C45/844B29C2945/76511B29C2945/76869B29C2945/76167B29C2945/7602B29C45/7653B29C2945/7611
Inventor 箱田隆
Owner NISSEI PLASTIC IND CO LTD