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What Is Injection Molding?
Injection molding is one of the primary methods of creating plastic goods. Not just any plastic goods – the process mostly entails the production of mass-produced parts of identical fashion.
This is one of the most efficient methods of producing items on a large scale for a company’s budget. Once the prototype is designed, the molding process is easily replicated, producing quality parts in the process.
Surprisingly, injection molding is an incredibly fast process that includes using extremely high levels of heat and pressure that rapidly insert different heated liquids into a cast. This liquid, otherwise known as molten, typically consists of various thermoplastics.
However, different metal and ceramic items can also be formed using injection molding. The casts used normally consist of two identical halves with imprints in them of one-half of the form of the desired product.
When placed together, the cavity in the middle forms the perfect outline of the finished product. Once the molten is injected into these molds, a cooling process is used to harden the liquid, turning it into either hard plastic, metal, or ceramic finished product.
If you assumed the highest costs associated with injection molding were the materials used to create the product, the labor, or the equipment – you were incorrect. The portion that influences the cost the most is the actual price of the mold, otherwise known as the tooling cost.
When developing these molds, manufacturers must factor in the desired number of parts, the design intricacies, materials, and the creation process.
The initial costs of creating the mold are much higher when compared to the varying costs of the other elements of the job. The combination of modestly-priced thermoplastics, low production times, and lack of human labor requires a much smaller investment compared to mold creation.
Because the process is automated and operated at scale, the higher the demand for volume is, the lower the cost-per-part becomes. Aside from the mold cost, as the size of the job increases, the per-unit cost of everything else decreases.