Injection Molding Service

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

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

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

The Injection molding plastic with the lowest cost. Food-safe grades available. Not suitable for mechanical applications.

High-performance engineering thermoplastic with excellent strength and thermal & chemical resistance. Used to replace metal parts.

Common thermoplastic with high impact resistance, low-cost & low density. Vulnerable to solvents.

Engineering thermoplastic with excellent mechanical properties and high chemical & abrasion resistance. Susceptible to moisture.

Blend of two thermoplastics resulting in high impact strength, excellent thermal stability, and high stiffness. Vulnerable to solvents.

Thermoplastic with high impact strength and good mechanical properties & hardness. Suitable for molding parts with thick walls.

UV resistant plastic with good abrasion resistance, stiffness and hardness.

The most common Injection molding plastic. Excellent chemical resistance. Food-safe grades available. Not suitable for mechanical applications.

Lightweight thermoplastic with good impact strength & weather resistance. Suitable for outdoor applications.

Excellent strength-to-weight ratio, impact and weather resistant.

Engineering thermoplastic with high strength, stiffness & moisture resistance and self-lubricating properties. Relatively prone to warping.

The plastic with the highest impact strength. High thermal resistance, weather resistance & toughness. Can be colored or transparent.

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.

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.
As-machined finish		The mold is finished to the machinist's discretion. Tool marks may be visible.