Industry Insights

Injection Molding

China is the world’s leader in plastic injection molding parts. Industries and uses range from automotive, military, construction, consumer products, and more. Redstone’s partners for injection molded plastic in China are located in Dongguan, near Hong Kong.

Redstone Manufacturing - Metal Casting and Machining
plastic - Redstone Manufacturing - Metal Casting and Machining

Redstone Capabilities for
Plastic Injection Molding in China

SIZES AVAILABLE20 grams to 10 kg
MATERIALS AVAILABLEABS, HDPE, LDPE, PE, PEEK, POM, PP and more.
TOLERANCE+/- 0.008″ (0.203 mm)
LEAD TIME5-8 weeks
Redstone Manufacturing - Metal Casting and Machining
Overview

What is
Plastic Injection Molding?

Injection molding is one of the most widely used methods for manufacturing with plastics thanks to its low cost, repeatability, and high-precision. Injection molding also has a higher variety of colors and plastic material types when compared to CNC machining or 3D printing.

Injection molding machines utilize high pressure and temperature to melt and form plastic. The pelletized raw plastic is feed-stock is melted in the injection machine and then injected into the  steel mold. The plastic part cools and solidifies into the final part within a matter of seconds.

The main steps in injection molding are:

  1. Clamping:  The steel mold is closed shut.
  2. Injection: Material is fed into the machine and melted by heat and pressure. The melted plastic is then injected into the mold — this is called the “shot.”
  3. Cooling: Plastic cools and solidifies into the intended form.
  4. Ejection: The part is ejected from the mold after it cools.
WHAT PEOPLE SAY ABOUT US
We were looking for a manufacturing expert in China and Redstone was able to provide complex components and assemblies quickly and with impeccable quality. We value our relationship with Redstone and view them as an extension of our own company.
SALVATORE EMMA
CEO of Teacherlock
Redstone Manufacturing produces metal injection molded steel parts for us. These are high-precision components with a tolerance less than half a thousandth of an inch. Redstone is a bankable supplier; they deliver quality parts on time.”
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