Home > Plastic Injection > Plastic Injection Molding - Parts, Molds, Pellets > APSX-PIM Plastic Injection Machine Parts
APSX is specialized in manufacturing small size plastic injection molding parts. We offer a few types of plastics as long as they are BLACK in color such as:
  • Acetal - Delrin [hard]
  • polypropylene (PP) [medium hard]
  • thermoplastic polyolefins (TPO) [medium]
  • polyethylene (PE) [medium soft]
  • thermoplastic elastomers (TPE) [soft]
100 to 1,000 parts shipped in 15 business days from Cincinnati, OH - USA

Having trouble uploading? Contact APSX by email to info@apsx.com.

Types of parts
Examples of parts made by plastic injection molding, instead of 3D printing or other rapid prototyping options, include: gears, enclosures, brackets, robotics parts, washers, front panels, motorcycle parts, auto parts, toy parts, knobs, packaging, appliance parts, power tool components, electronic enclosures.

APSX Plastic Injection Molding Process
Once a 3D CAD model is uploaded to APSX, you can communicate as much information about that part as possible at the time of upload. The part will be investigated based on APSX' plastic injection molding process to validate the part.

APSX machine the mold by our CNC machines to mill both sides of the mold out of an QC-10 aluminum block. You will receive a "rough" plastic part sample to approve the dimensional fit and plastic material. Then the mold moves to a molder for polishing it at your preferred level of finish.

The APSX injection molding processes is performed by using APSX-PIM which is an APSX made machine. When the process is complete, parts are boxed and shipped.

Design Rules
APSX plastic injection molding process has part dimension limits:
  • A maximum part volume of approximately 1.83 cu-in (30 cm³). Deeper parts are limited to a smaller outline.
  • 4 in. by 5 in. max (101.6mm by 127mm) or less than to 20 sq-in. (129 cm².)

A taper applied to the faces of the part that prevent them from being parallel to the motion of the mold opening is called draft. This keeps the part from being damaged due to scraping as the part is ejected out of the mold. Recommended draft:
  • 0.5 degrees on all vertical faces is strongly advised.
  • 2 degrees works very well in most situations.

Wall thickness
With injection-molded parts, observing proper and uniform wall thickness helps parts avoid potential issues such as sink marks and warpage.
Recommended thicknesses vary by material:
  • Acetal 0.030 - 0.120
  • Polyethylene 0.030 - 0.200
  • Polypropylene 0.025 - 0.150
Please note that thin walls only work on small parts and thicker walls are required where the resin has a long way to flow.

Surface finish
Standard finishes:
PM-F0: Non-cosmetic: finish to APSX discretion
PM-F1: Low-cosmetic: most toolmarks removed

Quote duration: 30 days

Response time:
1-2 days for part validation after the form data was received

Blushing – The whitening of plastic in areas that come under high stress.
Cavity – A hollow part of a mold that forms the outer part of a plastic-molded object.
Degradation – A change in physical properties of plastic resulting from light exposure, heat, exposure to oxygen and general weathering.
Fabricating – The use of various manufacturing methods to create plastic products — examples of fabrication processes include: cutting, tapping, fastening and punching such plastics as sheets, tubes, rods and more.
Gate – Molten resin flows through the gate in order to get from the runner to the cavity of the mold.
Impact Resistance – The measure of how much a plastic item can withstand high-speed stresses.
Injection Molding – The process of creating plastic parts and components by way of heating granular or powdered plastics and then forcing the liquid into a mold.
Insert Molding – The process of forming an object by molding plastic around metal inserts.
Land Area – The part of a mold where surfaces come in contact with one another when the mold is closed.
Low Temperature Flexibility – The ability of plastic to withstand fracturing at low temperatures.
Mar Resistance – A glossy plastic’s resistance to damage caused by abrasion.
Melt Flow – The viscosity of a polymer based on the polymer’s weight when extruded under certain pressure and temperature — varying by specific polymer.
Memory – A plastic article’s tendency to revert to previous dimensions based on earlier stages of manufacturing.
Metalizing – Covering or coating any plastic item with metal.
Mineral Reinforcements – Inorganic substances such as clay, talc or mica used as filler in plastics.
Mold Frame – The steel plates that comprise the components used in molding — mold frames typically include: cores, runner systems, cavities, cooling systems and ejection systems.
Polymer – Organic compounds of high-molecular weight — naturally occurring or synthetically made.
Sink – Imperfections such as dimples that occur as plastic cools at different rates along the surface.
Splay – Streaks occurring as the result of moisture in resin.
Sticking – A complication during ejection, during which a part is lodged in half of a mold.
Tear Strip – A removable feature that creates a crisp end of a molded part.
Warp – Curving or bending that results as a part cools and shrinks at varying rates along a surface