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How to confirm the cylinder temperature on reaction injection molding

Source: Honkia Prototype   Published: 2016-09-18   Views: 271

How to confirm the cylinder temperature on reaction injection molding? In order to ensure uniform plasticizing and no degradation of plastic, cylinder temperature on reaction injection molding should include the following principles:


RIM equipment


1. Cylinder temperature should be maintained at a certain point. For poor thermal stable plastics such as PVC, POM, the temperature should be lower. For solid filler plastic, the temperature should be relatively higher. All in all, the cylinder temperature should be determined according to the reaction injection molding material.


2. As for poor thermal stable plastics, residence time in the cylinder should be controlled as well as temperature to avoid overheating. The residence time is determined by actual injection quantity and the capability of injection molding machine.


3. Cylinder temperature is also related to molding parts and molding structure. For complicated molding parts, cylinder temperature should be higher, or it is likely to produce poor quality molding part because of low temperature.


4. As for materials containing much water, the cylinder temperature should be slightly higher to exhaust the water easily.


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