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Rapid prototyping is a broad term to describe a number of different manufacturing processes to rapidly create objects. The most common method is an additive manufacturing process called Fused Depostion Modeling, or more commonly referred to as 3D printing.
Angles or tapers that you incorporate to key features of your parts such as ribs, walls, posts and bosses that lie perpendicular to the parting line of your part will help to ease the ejection process and eliminate problems when running your injection molded plastic parts.
Good part design starts with optimized wall thicknesses. Wall thickness will often determine the mechanical performance, cosmetic appearance, moldability and cost-effectiveness of your plastic injection molded custom parts.
Part design, Mold Design and material selection are important when you are considering overmolding plastic parts.
Precision is critical for the injection molding process to work effectively. Your custom tools must not only capture every last detail of your custom parts, but must also be built tough enough to withstand high pressures of the injection molding process and built to last throughout the life of your project.
Optimized part design will help to reduce additional expenses when you face the need for fastening your plastic parts or require additional hardware installation such as hinges or fastening mechanisms.
Not only injection mold temperature determines melt temperature as it moves quickly through the mold. The melt temperature itself as it starts its journey through the injection mold (self-evidently) is the reference point. Speed of injection, particularly in thin sections, is of huge influence, as it will determine the degree of shear heating.
Many engineering materials like PBT (Polybutylene terephthalate) have a tendency of out-gassing. The best practices that I have to date are: Add 10mm wide vents spaced 30mm from each other all the way around parting line. Always follow the recommendations of the material company for vent depth.
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