Before (改善前)

When plastic injection molding is performed using a side gate method for medical plastic molding, a finishing process is required to separate the runner from the product after the plastic injection molding, which increases costs. In addition, if the gate may remain even after cutting, or chips during cutting may stick to the product, it would be a great risk of contamination of foreign matter in the product. Moreover, poor competence of the finishing of the gate part deteriorates the appearance quality, and the finishing cost is required to improve the quality.

V

After (改善後)

Manufacturing costs can be reduced by using pin gates and submarine gates as the gate method for injecting resin into the mold during molding of medical plastics. By adopting a method that automatically cuts the gate when the mold opens, such as a pin gate or submarine gate, the number of finishing steps such as deburring the gate part can be reduced to zero. In addition, the adoption of submarine gates and pin gates eliminates residual gates and improves the appearance quality of finished plastic injection molded products.

POINT(要約)

In the manufacture of plastic molded products for medical use, incorrect positioning of the gate will cause sink marks, welds, burrs, etc., and it leads poor quality with poor appearance, low yield and additional cost in some cases. Therefore, it is necessary to determine the gate type and gate position according to the material used, product shape, product thickness, number of cavities, etc. at the product design stage. Above all, pin gates and submarine gates cut gate during molding, so finishing costs can be reduced.