Custom injection molded parts for engineers for low volume runs and production, starting from 50 shots.

Injection Molding Service

Custom injection molded parts for engineers for low volume runs and production, starting from 50 shots.

Get a quote now Our capabilities

Custom molds making & plastic molded parts Rapid tooling short run production

Available materials for plastic injection molding

All thermoplastics can be injection molded. Some thermosets and liquid silicones are also compatible with the injection molding process.

Additives and fibers

JunYi offers additives and reinforcements as options for your plastics parts.

Name Description
UV absorbers Absorb UV radiation, slowing down the degradation of the material when used outdoors.
Flame retardants Prevent ignition and inhibits spread of fire.
Plasticizers Increase flexibility and promotes plasticity, reducing brittleness of the material.
Colorants Used to color plastics.
Carbon fibers Increase strength, toughness, and rigidity of the material at the expense of making the material more brittle.
Glass fibers Increase strength, toughness, and rigidity of the material at the expense of making the material more brittle. It is more flexible than carbon fibers.

Available surface finishes for injection molding

Injection molded parts are not usually post-processed, but the mold itself can be finished to affect the surface finish of the molded part.

This way aesthetic needs or technical requirements can be achieved.

  Name SPI Standard Description
  Glossy A-1, A-2, A-3 The mold is smoothed and then polished with a diamond buff, resulting in parts with a mirror-like finish.
Semi-gloss B-1, B-2, B-3 The mold is smoothed with fine grit sandpaper, resulting in parts with a fine surface finish.
Matte C-1, C-2, C-3 The mold is smoothed using fine stone powder, removing all machining marks.
Textured finish D-1, D-2, D-3 The mold is first smoothed with fine stone powder and then sandblasted, resulting in a textured surface.
matte finish As-machined finish   The mold is finished to the machinist's discretion. Tool marks may be visible.
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