Injection Mold Design Guide __full__ Site
Cooling accounts for up to 70% of the total injection molding cycle time. An optimized cooling system reduces cycle times and prevents thermal warping. Cooling Channel Placement
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Cooling constitutes 70-80% of the total cycle time. injection mold design guide
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The gate is the small opening where molten plastic enters the cavity. Common types include: Cooling accounts for up to 70% of the
: Used in hot runner systems. Plastic is kept molten all the way to the cavity entrance. This eliminates runners entirely, generating zero scrap material, but requires highly expensive tooling. Venting System
The narrow opening where plastic enters the cavity. Gate selection (e.g., edge, sub, pin, or hot tip gates) depends on part aesthetics, material viscosity, and automated production requirements. Place gates at the thickest section of the part to ensure proper packing. The Cooling System Share your part geometry with us for a
The Ultimate Injection Mold Design Guide Designing for injection molding is a balance of physics, material science, and mechanical engineering
The sprue is the primary entry point into the mold. It must have a draft angle of at least 2° to 3° to ensure it pulls out cleanly during ejection. The sprue diameter must be slightly larger than the machine nozzle orifice to prevent backflow. Runner Systems
Contains the ejector plates and pins that push the part off the core. Tooling Material Selection
Provides high hardness, improved toughness, and general-purpose machinability. The choice depends on production volume, material abrasiveness, and required surface finish. Hardened tool steels like H13 and S7 are recommended for glass-filled nylons and high-volume runs exceeding 500,000 cycles. Stainless steels are used for corrosive resins such as PVC.