SERVICES
PS Injection Molding
Polystyrene is the cheapest resin to mold — and one of the easiest to crack if the process is wrong. We mold GPPS and HIPS on our automated presses, from low-volume bridge runs to high-volume production, with DFM and mold-flow analysis that keep stress cracks, sink marks and weld-line failures out of your parts. Clear optical-grade GPPS or impact-tough HIPS — one partner, prototype to volume, DIN-7168-m tolerances.
THE REAL DECISION
Small-Batch Sourcing, Done Right vs. Done Wrong
Low-volume buyers usually hit one of two paths. The wrong one costs months and doubles the budget; the right one gets real production parts in your hand in weeks. Here is what separates them.
Crazing & stress cracks — PS brittleness bites back
Molded-in stress plus PS brittleness equals micro-cracks around gates, inserts and snap-fits — the classic "cracked in the field" failure. GPPS does not yield; it fractures.
Transparent-part defects — flow marks, weld lines & splay
The clarity that makes GPPS attractive exposes every flow mark, weld line and sink mark. A clear part that fails cosmetically fails completely — defects invisible in opaque resins show up instantly in optics.
WHAT WE OFFER
The Route That Fits Your Order
GPPS vs HIPS: Which Polystyrene Grade Do You Need?
PS splits into two families that behave almost like different materials — crystal-clear GPPS and impact-tough HIPS. Match your part's abuse level and optical demands to the right one.
PS: Transparent, Rigid and Cheap — With a Brittleness Catch
Polystyrene delivers the highest stiffness-to-cost ratio in molding — and the transparency to match, with up to 1500×1000 mm parts and DIN-7168-m tolerances. MOLDITQUICK molds GPPS and HIPS grades on its automated press fleet under ISO9001 control.
High transparency — clear GPPS rivals acrylic for low-cost see-through parts; HIPS trades clarity for toughness.
Excellent stiffness and dimensional stability — parts hold their shape with predictable amorphous shrinkage.
Outstanding electrical insulation — PS is a standard dielectric for high-frequency and switchgear components.
Very low cost — one of the cheapest resins to mold, ideal for high-volume consumer and packaging parts.
Easy flow and fast cycles — fills thin walls and long flows; short cycles cut unit cost further.
Full colorability — transparent, translucent and opaque colors matched to Pantone/RAL with ΔE ≤ 1.0.
Proven in precision parts — high-end automotive lights and precision medical components molded with mold-flow-backed design.
PS Grades & Modified Compounds We Mold
The PS families we mold — GPPS, HIPS and modified compounds — including two-color and overmolding combinations.
PS Processing Parameters We Control
Barrel, mold and shrinkage windows per published PS molding data; drying per industry standard — verified on our presses under ISO9001 control.
| Parameter | Recommended Range | Why It Matters |
|---|---|---|
| Barrel temperature | 180–280 °C | Wide, forgiving window — PS flows freely; the upper end suits high-flow thin-wall parts. |
| Mold temperature | 20–70 °C | Cool molds give fast cycles; hotter molds improve surface gloss and weld-line strength. |
| Mold shrinkage | 0.4–0.7 % | Predictable amorphous shrinkage — cavity compensation keeps mating parts in tolerance. |
| Drying | Rarely needed (< 0.1 % absorption) | PS is not hygroscopic — resin can run straight from the hopper. |
| Wall thickness | 1.0–4 mm typical | Uniform walls prevent sink marks; thinner walls need higher flow grades. |
| Injection pressure | 70–140 MPa typical | Enough for thin walls; watch flash as PS flows easily at high pressure. |
Where PS Injection Molding Pays
Automotive
Lamp covers, glove-box parts, center-console elements, mirror housings and tail-light lenses.
Consumer electronics
TV housings, printer parts, battery-pack housings, speaker housings and light-switch plates.
Daily goods
Cassette and storage cases, combs, pen barrels, cosmetic cases, transparent buttons, sunglass frames.
Medical & lab
Petri dishes, diagnostic housings, blister packs, IV-set components and safety shields.
Packaging
Transparent boxes, trays and display packaging in low-cost GPPS.
Electrical
High-frequency capacitors, switch plates and insulating components leveraging PS dielectric performance.
FAQ
PS Injection Molding — FAQ
Can you help with product development?
Yes. From design review and material selection to prototyping, tooling and mass production — our engineers support you through the entire product lifecycle.
Do you ship internationally?
Yes. We ship worldwide via air and sea freight, with export packing, documentation and delivery tracking handled by our team.
What quality inspections do you perform?
First article inspection, dimensional measurement, material verification and surface checks — with inspection reports provided per batch. Full details are agreed before production.
What is the difference between rapid and production tooling?
Rapid tooling uses softer materials and simplified construction for fast, low-cost validation runs (hundreds to low thousands of parts). Production tooling uses hardened steel for high-volume, long-life programs.
How long does injection mold making take?
Rapid tooling prototypes can be ready in days; production tooling typically takes several weeks depending on complexity, cavity count and steel grade. We confirm a detailed schedule with your quotation.
Do you provide DFM feedback?
Yes. Every quotation includes a design-for-manufacturing review: draft angles, wall thickness, gate and weld-line locations, tolerance recommendations and cost-saving suggestions — before any tooling is cut.
What file formats do you accept?
We accept STEP, IGES, STL, X_T and 2D drawings (PDF or DWG). A 3D model lets us quote most accurately; 2D drawings are used to confirm critical tolerances and specifications.
How do I get a quote?
Upload your 3D file (STEP, IGES, STL or X_T) through the quote page, or email it directly. Our engineers review the design, run a DFM check and send you a detailed quotation — usually within one business day.
Ready to Start Your PS Injection Molding?
Factory-direct pricing, ISO-certified quality and rapid lead times. Send your spec and volume, get a quote within 24 hours — DFM review included.