Press Fit Temperature Sensor

RJG (Traverse City, MI) developed the Press Fit Cavity Temperature Sensor as a tool to analyze temperature variation inside the actual mold cavity.

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RJG (Traverse City, MI) developed the Press Fit Cavity Temperature Sensor as a tool to analyze temperature variation inside the actual mold cavity. These sensors work in conjunction with RJG’s eDARTTM Process Control System to assist molders in diagnosing processing problems relating to temperature issues. The temperature of both the melt and mold make up two of the four “Plastics Variables” that determine how a part is formed. The press-fit cavity temperature sensor is simple to install by drilling a small hole for the wire, and a flat bottomed pocket with the tolerance necessary to press fit the device in from the cavity face. Locate the sensors near areas where short shots, dimensional errors or warp are likely to occur. Placing sensors in different areas of the part can show problems with non-uniform cooling. The best use of temperature sensors for control is with valve gates, particularly when there is little or no pressure at the point you wish to actuate a gate. For example you can open a gate when the flow front just passes the gate by placing a temperature sensor there. A sudden rise in temperature indicates the arrival of the flow front. Temperature sensors can play a critical role in detecting cooling inconsistencies that cannot be detected by the machine controller, making them a valuable tool for troubleshooting processes.