Custom Injection Molding

Written by Jill Morrison
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Custom injection molding is a great option for companies that need to create unique parts with exact measurements. It can be very expensive, so companies should consider all options for lowering total costs. Costs can be minimized by choosing certain materials, creating cost-effective mold designs, and by lowering the weight of parts. Companies should focus on making their parts as small and lightweight as possible with custom orders.

Custom Injection Molding Techniques

With custom injection molding, companies will need to create their own mold designs and decide on which materials to use. Metal, rubber, and plastic are the three main choices of materials. Plastic is the most popular option because it is versatile, sturdy, and also low in cost when compared to other materials. Metal is the most durable material option, but it is also the most expensive material. Metal is most often used for smaller parts because of its high costs.

With plastic or rubber injection molding, materials are initially melted into a liquid. The liquid is then injected into a custom mold. Custom parts can be removed from their molds after they have cooled and hardened. On the other hand, metal injection molding uses heat to harden custom parts. After metal powder and binder are injected into the mold, the mold is then heated to extreme temperatures. This allows for the powder to shrink and to minimize pores as it hardens.

The design of custom parts is an important consideration for injection molding. To minimize costs, walls should be as thin as possible for part designs. This will lower the overall weight and size of each part. It will also minimize costs because using thin walls will shorten cycle times and offer more rapid cooling.


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