Injection Molding Services

Injection Molding Processes

The injection molding process requires an injection molding machine, raw plastic material, and a machined mold. The raw plastic material is first melted in the injection unit then injected into the mold — most often machined from steel or aluminium — where it cools and solidifies into the final plastic part.

Go from prototyping to on-demand manufacturing in days for affordable, high-quality molded parts. Even better, once you move to on-demand manufacturing tools, your prototyping tools are free. Crown Part can also provide you with free design consultation services, which can greatly speed up the manufacturing process, allowing for greater supply chain flexibility, more consistent parts, and making certification a breeze.

• Plastic Injection Molding

Plastic injection molding is a manufacturing process in which resin in a vat is heated to a molten state and then injected into a mold to form the final production-grade thermoplastic part. And it’s also a steel tool with short lead times, ideal for prototyping, design validation, and bridge production.

• Liquid Silicone Rubber Molding

Liquid Silicone Rubber (LSR) molding, sometimes known as Liquid Injection Molding (LIM), is a thermoset process of two compounds mixed and then heat-cured inside the mold using a platinum catalyst to create flexible silicone parts. A low compression set and the ability to resist extreme temperatures make LSR moldings durable and ideal for challenging applications. LSR elastomer offers exceptional optical clarity, durability, and design flexibility while maintaining excellent mechanical properties across a wide range of temperatures (-50oC to 250oC). LSR injection molding is suitable for manufacturing complicated geometries and can combine multiple functional elements into a single part due to its design and tooling flexibility. LIM provides considerable advantages in terms of product dependability and the total cost of tooling.

• Overmolding & Insert Molding

Overmolding and insert molding are two-part injection molding processes where one material is overlaid onto a second substrate part or metal insert to create a single component. Overmolding means that rubber or silicone molding over an existing plastic part. Insert Molding means that plastic injection molding around a preformed, often metal threaded, insert.

Injection Molding Materials

If you are still struggling with material selection, Crown Part can end it for you. We have wide selection of more than 100 thermoplastic and thermoset materials.