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Mold Closing Mechanism And Mold Closing Method

A mold clamping device and mold technology, which can be used in molding tools, casting molding equipment, presses, etc., and can solve problems such as unstable control of servo motors.

Active Publication Date: 2014-06-25
MURATA MASCH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Here, when the control is switched discontinuously between other sensors and the linear sensor, a slight difference in detection values ​​between the sensors is fed back to the control unit as a large control error, and the control of the servo motor becomes unstable.

Method used

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  • Mold Closing Mechanism And Mold Closing Method
  • Mold Closing Mechanism And Mold Closing Method
  • Mold Closing Mechanism And Mold Closing Method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0034] basic embodiment

[0035] Figure 1 to Figure 4 A basic embodiment and its properties are shown. figure 1 The injection molding apparatus 2 of the embodiment is shown, and the upper mold 4 is a movable mold capable of moving up and down by a pressure shaft (die bar) 12, and is equipped with a moving mold 8 for injecting synthetic resin by injection molding. The fixed lower mold 6 is provided with a fixed mold 10 for injecting synthetic resin. The upper die 4 is guided by, for example, four guide pins 11 , and moves up and down via a pressure shaft 12 by a crank mechanism 14 and a servo motor 16 . Furthermore, an injection device 18 including a screw pump, a push rod, etc. is connected to the lower mold 6 to inject synthetic resin into a cavity between the molds 8 and 10 . In addition, the dies 4 and 6 may be arranged side by side instead of being arranged up and down, and both may be opposed to each other. In addition, it may be formed as a press molding device except...

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PUM

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Abstract

The present invention provides a mold closing mechanism and a mold closing method. The effects of the deformation and son on of a mold caused by force is minimal, a used sensor is smoothly switched in the process of the mold closing. A servo motor is fed back and controlled to make the mold mobile according to a coder. Intervals among a measurement mold of a sensor for mounting a mold near an opposing part of the mold are used, the servo motor is controlled according to the coder's signal in the range of delivering the sensor from the measurement region, the servo motor is controlled according to the sensor for mounting the mold's signal in the closest range of the mold. And then, when the mold enters in the measurement range of the sensor for mounting the mold, the control for the servo motor is continuously switch according to the control of the sensor for mounting the mold's signal from the control of the coder's signal.

Description

technical field [0001] The present invention relates to mold clamping technology in press molding, injection molding, die-casting molding, etc., and particularly relates to monitoring or position control of mold positions when opposing molds are closest to each other. Background technique [0002] A linear sensor is known as a sensor for measuring the position of a moving body. In the linear sensor, magnetic markers in which magnetic materials and non-magnetic materials are arranged, or magnetic markers in which magnets with different polarities are arranged are provided, and a sensor head including a plurality of coils is provided. When the position of the sensor head relative to the magnetic mark changes, the magnetic interaction between the magnetic mark and the coil changes, so the position of the sensor head relative to the magnetic mark can be found. [0003] In mold clamping devices (molding devices) using molds such as press molding equipment, injection molding equi...

Claims

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Application Information

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IPC IPC(8): B30B15/14B29C45/64B29C45/76B21D37/00B22D17/26
CPCB21D37/00B21D37/14B22C21/08B30B15/10
Inventor 林孝雄
Owner MURATA MASCH LTD