Verification of Demolding Assist Effect with Compressed Air Due to Difference in Ventilation Direction of Breathable Mold

Abstract

In order to further reduce the demolding resistance when a molded product is released from the core mold in plastic injection molding, we developed a breathable mold in which a porous part was inserted in the core mold. By pushing compressed air through the porous insert from the inside of the core mold during the release process of the molded product, the local load during demolding was reduced. The effect of reducing the demolding resistance was verified when the ventilation direction of the compressed air was different between the extraction direction of the molded product (end face breathable) and the direction perpendicular to the extraction direction of the molded product (side breathable).