What Is Flash Injection Molding?
Flash, also known as overflow, flare, burr, etc., mostly occurs at the opening and closing positions of the mold, such as the parting surface of the movable mold and the static mold, the sliding part of the slider, the gap of the insert, and the hole of the ejector pin. In some places, the flash […]
5 Injection Molding Defect Solutions
The phenomena and solutions of various defects in injection molding refer to the phenomenon and corresponding solutions of cracks, insufficient filling, wrinkles, and pockmarked surfaces, shrinkage pits, and overflow in plastic products during injection molding. 1. Cracking Cracking is a common defect in plastic products, and the main cause is due to stress and deformation. […]
How Does Back Pressure Affect Injection Molding?
The backpressure during pre-molding indicates the pressure in the metering chamber of the screw during pre-molding. Backpressure has a greater influence on melt temperature The increase of backpressure makes the material in the screw groove compact and prolongs the thermal process of the material in the screw. The quality of plasticization has also been improved. […]