Flow front detection system

Advantages of introduction

Control of V-P transfer timing

Due to variations in the V-P transfer position caused by wear of components such as the screw in the injection molding machine, high-precision V-P transfer control based on measurement data becomes possible by sending a signal to the injection molding machine, using the timing when the resin reaches the flow-front detection sensor as a trigger. This contributes to the stabilization of molded product quality.

Features

The flow-front detection sensor detects the arrival of the resin flow front and outputs a control signal to the injection molding machine or external devices. The flow-front detection sensor, which employs an optical fiber infrared method, achieves a high-speed response of 8 ms, making it suitable for precise control of injection molding machines and external devices.
As a result, it can be utilized for applications such as V-P transfer control of injection molding machines and valve gate open/close control for hot runners, contributing to the stabilization of molded product quality.

Measurement principle

The flow-front detection sensor is equipped with a built-in optical fiber, and when it is installed in the mold, it instantly detects the infrared radiation emitted from the resin at the moment the flowing resin reaches the sensor inside the cavity. Upon detection, an open-collector output signal is generated, and the LED lamp on the detection amplifier lights up simultaneously.

Types of sensors

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  Flow front detection amplifier
  DIS01

  • Due to the infrared ray detection method, which is resistant to disturbance, this product achieves noise resistance at a high level.
  • The threshold for control signal output can be freely adjusted in the range of 0 to 13 V.
• 

  Flow front detection sensor
  DISSZL series

  • Infrared ray detection method that uses optical fiber
  • High responsiveness: 8 ms (at time of 63.2％ response)
  • Resin temperature in the range of 60˚C to 430˚C can be measured.
  • The ejector pin shape allows easy incorporation in a mold. (*1)

  *1 Machining such as flange cutting to prevent rotation is not possible.

• 

  Flow front detection sensor
  DISSZT series

  • Infrared ray detection method that uses optical fiber
  • High responsiveness: 8 ms (at time of 63.2％ response)
  • Resin temperature can be measured in the range of 60˚C to 390˚C.
  • Its flush-mount shape has achieved a highly flexible sensor installation position.