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Polystyrene (PS) Injection Molding

  • Prototype Tool In Soon As 10 Days
  • Production Tool In As Soon As 3 Weeks
  • 10k Parts in 10 Days
Quotes for 25+ Manufacturing Processes.
Tooling & Injection Molding Services
Complex Parts
Highly Scalable
with Versatile Materials
Any Size
Company Supported
Polystyrene (PS) Injection Molding

Fathom offers the latest injection molding technology, producing high-quality polystyrene (PS) parts for its customers. Fathom’s experts are ready to help you with your time-sensitive, high precision, highly complex, or short production run-related projects. Injection molding is just one of many manufacturing technologies offered by Fathom. Get started today.

What is Polystyrene (PS)? / /

Polystyrene is a popular raw material that can be used for various products. PS is made through a distillation of hydrocarbon fuels mixed with catalysts to form plastic. A synthetic polymer, PS is non-toxic and odorless. Polystyrene is easy to form and lightweight. Common applications of polystyrene include food packaging, toys, utensils, packing material, single-use cups, auto parts, etc. Polystyrene is flammable and, when burned, emits water and CO2.

Polystyrene (PS) Injection Molding / /

Polystyrene (PS) is used for injection molding for multiple reasons. Polystyrene is durable, recyclable, and provides good insulation. PS is resistant to both bacteria and moisture. A lightweight material, it is odorless and nontoxic. Polystyrene is a cost-effective and widely available material that can be used in many different industries. Polystyrene has a high melting point and requires a high energy input when injection molding. PS has an excellent shrinkage rate of around 0.5%, which is considerably low compared to other plastics. Polystyrene can be injection molded into solid or foam parts.

What are the Different Types of Polystyrene? / /

There are three main categories of polystyrene: plastic, film, and foam. Polystyrene film is stretchable and is vacuum formed for packaging. The foam form of polystyrene includes expanded polystyrene (EPS) and extruded polystyrene (XPS). EPS is used to produce packing peanuts or Styrofoam. XPS has a higher density and is sometimes used to build models. The homopolymer plastic PS is brittle and can be combined with other materials to add impact resistance. General-purpose polystyrene (GPPS) is clear, while high-impact polystyrene (HIPS) is opaque. In its plastic form, PS is used to make everything from Petri dishes to instrument panels.

Polystyrene (PS) Injection Molding Finishes / /

Following injection molding, the part is moved to the finishing process. The finishing stage can change a part’s appearance or enhance its physical properties. Here are some of the finishing processes offered by Fathom.

Standard No Machine Mark Tool Marks Removed Low Cosmetic
SPI-C1 600 Stone Low Polish Parts
SPI-B1 600 Grit Paper Medium Polish Parts
SPI-A2 Grade #6 Diamond High Polish Parts
SPI-A1 Grade #3 Lens or Mirror
IM-1 Light Bead Blast Need 1 Degree Draft Angle
IM-2 Medium Bead Blast Need 1.5 Degree Draft Angle
IM-3 Heavy Bead Blast Need 3 Degree Draft Angle

Injection Molding Machines Used by Fathom / /

Fathom’s manufacturing technologies include injection molding and hybridized services that leverage 3D printing. Do you need injection molding as part of your complex project? Fathom can help. In a recent case study, Fathom delivered over 20,000 parts in 27 days, using 55+ tools, including multiple injection molding services:

Case Study //

Real Customers. Real Results.

A customer came to Fathom with a complex project that spanned the technologies and processes of rapid production—and needed it done fast. Fathom delivered.

20,000 Parts // Within 27 Days
55+ Tools to Injection Mold 15,000 Parts First Article in 2 Weeks

55+ Tools to Injection
Mold 15,000 Parts

First Article in 2 Weeks

3,000+ 3D Printed Parts

3,000+ 3D
Printed Parts

2,000+ Metal Fabricated Parts

2,000+ Metal
Fabricated Parts

Hybridized Services Used //

3D Printing / Additive Manufacturing—PolyJet, SLS, MJF.

DFM Analysis + CAD Mods.

CNC Machining. Laser Cutting.

Stamping. Die Cutting. Post-Opp Drilling.

24-hour Turnaround Urethane Casting.

Injection + Compression Molding.

Model Finishing. Insert Assembly.

Advanced Project Management.

Polystyrene (PS) Injection Molding FAQs / /

Q: Does Fathom offer injection molding?

A: Yes, Fathom offers injection molding services.

Q: What is injection molding?

A: Injection molding is a manufacturing process commonly used for plastic parts. During injection molding, molten plastic is injected into a two-part mold using high pressure. Once the part has cooled inside the mold, it is ejected. The part may or may not require a secondary finish.

Q: Is Fathom ISO certified?

A: Fathom’s certifications include ISO 9001:2015, ISO 9001:2015 Design, and ISO 13485:2016. For site-specific certifications, please visit https://fathommfg.com/fathom-manufacturing-certifications.

Q: Is Fathom ITAR certified?

A: Yes, Fathom is ITAR certified. For site-specific certifications, please visit https://fathommfg.com/fathom-manufacturing-certifications.

Q: Is Fathom AS9100:2016 certified?

A: Yes, Fathom is AS9100:2016. For site-specific certifications, please visit https://fathommfg.com/fathom-manufacturing-certifications.

Q: Is Fathom NIST 800-171 certified?

A: Yes, Fathom’s certifications include NIST 800-171. For site-specific certifications, please visit https://fathommfg.com/fathom-manufacturing-certifications.

Q: Can you injection mold polystyrene?

A: Polystyrene is suitable for injection molding.

Q: What is PS polystyrene used for?

A: Polystyrene is used to make many different products, including disposable cups, utensils, packing peanuts, food packaging, toys, etc.

Q: Is PS short for polystyrene?

A: Yes, PS is short for polystyrene.

Q: Why is polystyrene used for molding?

A: Polystyrene (PS) can be liquified and has a low shrinkage rate, making it an ideal material for injection molding. PS can be reheated, cooled, and heated again without degradation, which helps to reduce material waste.

How to Get Polystyrene Molding Quotes / /

Are you ready for a quote or to calculate costs on a polystyrene injection molding project? Send Fathom the details of your design through the SmartQuote application for a fast quote.

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