Service Overview

Injection Molding Services

Injection molding produces parts by forcing molten material into a mold where it cools and hardens to the mold’s shape.

eMachineShop offers cost-effective injection molding solutions whether you need a hundred pieces or a large production order.

  • 50+ Materials.
  • FREE Shipping in the USA.
  • 100% Quality Guaranteed.
Customers Include:

What is Plastic Injection Molding?

Plastic injection molding is a process by which granular plastic is fed from a hopper into a heated chamber where it melts and hardens to create parts.

The granules are fed into the heating chamber by a screw-type plunger where they melt. As the plunger advances, the melted plastic is forced through a nozzle into the mold cavity.

Since the mold remains relatively cold, the plastic solidifies almost immediately after the cavity is filled. After the plastic is injected, it must cool before the final part can be ejected from the mold.


  • Economical for large quantities
  • Can make almost any 2D or 3D shape
  • Side and threaded holes moldable
  • Finishing not required


  • Automotive components
  • Gears
  • Washers
  • Wire spools
  • Enclosures

Design Tips for Injection Molded Parts

Use uniform wall thickness

Keep wall thickness between 1/32″ and 1/10″

Use ribs to strengthen parts

Use ribs of about half the main wall thickness

Round inside and outside corners to a radius of .05″ or greater.

Add a 2-degree taper to part walls for easy release from the mold.

Appearance Optimization

Tip #1

Make the joint at the mold’s parting line pronounced to make it look decorative

Appearance Optimization

Tip #2

Design the gate and pins into less visible places as they can mark parts

Appearance Optimization

Tip #3

Use light-colored material to hide flow patterns

Appearance Optimization

Tip #4

Design surfaces to be matte or textured to hide imperfections


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