What are the common problems of TPE overmolding process - Forwa injection molding factory
What are the common problems of TPE overmolding process? Forwa plastic injection molding factory said that TPE in daily life is widely used, relatively speaking, TPE material in overmolding process is more complex, a little attention will occur adverse problems, affecting the quality of plastic injection molding, increase the product defect rate, improve the cost of plastic injection molding. So, what are the common problems of TPE plastic injection molding process?
1. Keep dry: raw materials contain different degrees of moisture and other volatile molecules in the first half of the plastic injection molding, especially the raw material TPE has a hygroscopic tendency, so the water content often exceeds the allowable limit of processing. Therefore, the plastic must be dried before injection, to detect the water content.
2. Regularly clean the cylinder: When the injection molding machine changes the plastic injection molding products in the production, changes the raw materials for injection molding, changes the color or finds the decomposition of plastic, it needs to clean or disassemble the cylinder of the injection molding machine;
3. Injection molding temperature design: in the process of plastic injection molding, the accuracy of temperature design is related to the appearance and quality of injection parts. Generally speaking, PP injection molding temperature control at 160℃~200℃; ABS injection molding temperature is controlled at 180℃~230℃; PC injection temperature control in 180℃~220℃; The injection temperature of PA coating is controlled at 240℃~280℃. The specific temperature standard will change according to the quality requirements of different injection parts.
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