ps machining

CNC Machining for Polystyrene (PS) Part 

We’ve been machining polystyrene (PS) for years, making everything from prototypes to custom parts for real projects. PS can be tricky—thin walls, delicate features, and complex shapes—but we know how to handle it. With the right tools and careful CNC setups, every part comes out clean, accurate, and ready to use.

Our CNC PS parts go into electronics (like housings and insulation mounts), display and signage (transparent panels and fixtures), consumer goods (lightweight structural pieces), and educational models. From the first design optimization to the finished part, we make sure everything works as expected and stays on budget.

PS CNC Machining Capabilities & Options

The following CNC PS machining capabilities options are provided as a general reference and can be customized according to part requirements.

Parameter Recommended Range
Max Part Size 800×500×300 mm
Color Options Clear/Pantone / Sample / Custom colors
Surface Finishes As-machined / Polished / Painted
Tolerances ±0.10–0.15 mm
Cost ⭐⭐⭐☆☆
Tensile Strength, Yield (MPa) Elongation at Break Hardness Impact Strength Heat Deflection Heat Deflection Temperature Melting Point
35–55 MPa 1–3% R110–R120 10–30 J/m 90–100°C 80–90°C No true melting point; softens at about100°C

Advantages & Application of CNC Polystyrene

Common PS CNC Parts Surface Treatment

PS is commonly used for CNC parts such as housings, panels, display covers, and decorative components. It is rigid, easy to machine, and has a smooth surface finish, making it suitable for decorative and visible applications.

Mechanical or flame/chemical polishing is suitable for visible housings or display panels, providing a smooth and glossy surface that enhances visual appeal. Note that polished PS surfaces are brittle and prone to cracking, so gentle handling is required during machining, transportation, and assembly.

Laser engraving or marking is suitable for logos, part numbers, or decorative patterns. Low-power settings are recommended to prevent charring or cracking of the brittle PS surface.

For panels, handles, or components requiring a matte or textured finish, light sandblasting can hide machining marks and improve grip. The intensity should be carefully controlled to avoid cracking or surface damage.

CNC PS components can be bonded using compatible adhesives or solvent welding for functional assemblies. Proper handling is essential to avoid stress cracks at joints.

CNC PS parts can be painted or coated to change color or add protection. Applying a plastic primer first is recommended to improve adhesion and reduce the risk of cracking or peeling. UV-resistant coatings are advised for outdoor components.

Yes, PS machining is effective for lightweight, low-cost parts with good dimensional accuracy.

GPPS offers better clarity, while HIPS adds impact resistance. We machine both based on your needs.

Yes, with proper fixturing, we can produce intricate details and thin features in polystyrene.

Yes. We follow strict safety and ventilation protocols, especially when machining high-speed.

Absolutely. Our engineers offer DFM (Design for Machining) feedback to help optimize your part.

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