Plastic Injection Molding China Manufacturer

Plastic injection molding provides tight tolerances and repeatability and is ideal for high volume production of plastic molded parts. Injection molded plastic parts can be manufactured using a wide range of thermoplastic polymers, resins and elastomers, making it an ideal and cost-effective process for various industries and applications. 

Injection molded parts are creatmatched by pouring raw plastic resin into a hopper, then heating the resin and injecting it into a custom mold. Pressure is used accommodate shrinkage and once the plastic molded part has fully cooled, the mold is opened, and the parts are removed. Because of the tight tolerances, plastic injection molding is a suitable option for both standard and intricate plastic molded parts of all sizes.

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specializes in custom plastic injection molding (or "moulding") and provides services for industries  including aerospace, medical and consumer products. With our precision injection molding capabilities, we can create thousands or millions of identical parts. From simple to complex designs for parts between 0.01 g and 10 oz., we deliver precision plastic injection molding to match your unique specifications.

Innovative Plastic Injection Molding Techniques

While the basic process of plastic injection molding is relatively simple, involving only a handful of key elements, mastering the process at the level that Stack Plastics has is considerably more difficult. We think of our specific methods as "scientific molding"—we experiment with different variables and collect data that helps us optimize our injection molding processes. This helps us achieve maximum efficiency, provide superior quality custom plastic injection molded parts, and maintain perfect repeatability for parts in quantities in the millions.

Custom Plastic Injection Molding Capabilities

Plastic molding involves several processes including injection molding, overmolding, insert molding and micro molding, each of which produces a different result. Selecting the right process for your application depends on part size, dimensional tolerance and material, and whether the part requires material bonding or interior strengthening.

Overmolding: involves combining two or more elastomer or plastic molded parts to fabricate a single component. This process can produce tight tolerances and is typically used to create soft-grip surfaces, improve ergonomics or create color contrast for aesthetics.

Insert molding: an injection molding process where elastomers, thermosets or thermoplastics are molded or formed around metal and other non-plastic parts.

Micro molding: a tight tolerance process used to create incredibly small plastic molded parts. This process is frequently used for the fabrication of intricate medical and surgical devices. 

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 has been in business for over 20 years and has experience working with various plastic injection molding methods. Our experts can help you determine which injection molding process is best based on your product design and application requirements.

What Are Design the and Engineering Considerations for Plastic Injection Molding?

Since each plastic molding process is different, it is important that your design and tolerance requirements are compatible with injection molding and that you understand any limitations associated with the process. Retooling can be costly and slow down your production time, so you want to make sure you address any design concerns in the beginning to prevent issues during production.

With more than  years’ experience in plastic injection molding, we know what works and what doesn’t. We can provide design and engineering advice, as needed, to help make manufacturing our customers’ products faster, more efficient, and less expensive. We can review your design and advise certain changes that will allow us to produce your plastic injection molded parts or components more efficiently, more quickly, and with better quality, without sacrificing performance.

If no such changes are possible,  can add more levels to our quality inspection processes, to ensure that your injection molded parts will meet our high standards for quality, and yours.

Is Clamping Force a Determining Factor in Injection Molding Design?

Clamping force relates to the amount of pressure that is required to close a mold. Having the right amount of force is essential not only for holding the mold closed but for ensuring the force of the molten resin being poured does not cause the mold to come apart. Since each resin can generate a different amount of force, it is also important to take injection molding clamping force into consideration when selecting a material. The size of your die also determines the required tonnage of the press that is used during the injection molding process.

understands that each die and plastic material has different clamping force requirements and that appropr.