12/16/2023 0 Comments Ejector pin![]() Pins need a flat area to push against, and the surface of that pad must be perpendicular to the direction of pin movement, so slants and curves can cause problems with your ejector pin placement. Softer resins may also be at risk of marring or puncturing, requiring wider or more pins to spread the force out. For example, some resins are “stickier” than others and require more force to release from the mold. Your choice of resin may affect pin size or placement. For plastic materials like PP, PE, and Nylon, hole diameter = pin diameter + 0.01mm for plastic materials like HIPS, PC, and ABS, hole diameter = pin diameter + 0.02mm.Clearance between the pin and the hole should be 0.02mm or less.Minimum clearance of 1/32” for pin holes on the ejector plate.Minimum clearance of 1/64” for pin holes on the mold plate. ![]()
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