SERVICES
PC Injection Molding
Undried PC turns into brittle, silver-streaked parts — and stress-cracked housings fail in the field. MOLDITQUICK molds Polycarbonate (PC) and compatible grades for functional, structural and optical parts, from low-volume bridge production to high-volume runs, with 120 °C drying discipline, hot-mold control and stress-relief annealing that keep every part tough, clear and dimensionally stable.
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.
PC not dried to spec — brittle from the mold
PC is strongly hygroscopic: resin that skips 120 °C drying absorbs moisture, and the melt degrades into silver-streaked, brittle parts that crack under normal load instead of bending.
Molded-in stress — cracks that appear later
Cold molds and fast fill freeze high internal stress into the part. Combined with a sharp notch or solvent contact, it surfaces weeks later as crazing and stress cracks — often after the part already shipped.
WHAT WE OFFER
The Route That Fits Your Order
PC Grades & Compounds We Mold
Standard, filled and blended PC grades molded on our floor — with grade-selection guidance in DFM.
Standard & Optical PC
Clear grades for lenses, light guides and displays — molded with hot molds and slow fill for optical quality.
- High light transmission
- High-gloss surfaces
- UV-stabilized variants
Glass-Fiber Reinforced PC
10–40 % glass for stiffness and dimensional stability in structural parts.
- Higher modulus
- Better creep resistance
- Reduced shrinkage
Flame-Retardant PC
UL94 V-0 rated grades for electronics enclosures and power applications.
- UL94 V-0 rating
- Halogen-free options
- Good colorability
PC/ABS & PC/PBT Blends
PC/ABS balances flow and cost; PC/PBT adds chemical resistance for automotive.
- Improved flow
- Chemical resistance
- Paint-ready surface
Anti-glare & light-diffusing PC
Diffusing and anti-glare grades for displays and automotive interior lighting panels.
- Uniform light spread
- Low haze options
- Automotive-approved
PC vs. PMMA vs. ABS: Which Resin Fits Your Part?
Polycarbonate is not the only clear or tough thermoplastic. Impact, heat, clarity and budget decide — match your part to the right resin.
Where PC Injection Molding Pays
Optical & lighting
Lenses, light guides, headlight assemblies, interior lighting panels, display screens and sight glasses.
Automotive & EV
Headlight assemblies, door handles, sunroofs, rearview mirror housings and engine covers.
Electronics & industrial
Control panel covers, gear covers, lighting enclosures, cooling fan blades and inspection windows.
Consumer & personal care
VR equipment, gaming handhelds, hair dryer bodies, electric toothbrush handles, cosmetic compacts and razor handles.
Telecom & energy
Modem and router housings, junction box covers and lighting enclosure lenses in flame-retardant grades.
PC Processing Parameters We Control
Drying, barrel and shrinkage windows MOLDITQUICK holds on every PC run, verified on our floor under ISO9001 / IATF16949 quality control.
| Parameter | Recommended Range | Why It Matters |
|---|---|---|
| Drying | 120 °C, 3–4 h | PC is strongly hygroscopic — undried resin turns into brittle, silver-streaked parts. |
| Barrel temperature | 260–310 °C | High melt temperature is needed for full plasticization; stay below ~330 °C to avoid degradation. |
| Mold temperature | 80–120 °C | Hot molds improve flow, surface and stress performance; cold molds create high molded-in stress. |
| Mold shrinkage | 0.5–0.7 % | Predictable and low — cavity compensation is straightforward. |
| Injection speed | Medium; slower for optical parts | High speed causes jetting; balanced fill prevents flow marks on clear parts. |
| Injection pressure | 80–140 MPa typical | High enough to pack thin walls without overpacking the gate area. |
Polycarbonate: Optical Clarity + Impact Strength in One Resin
PC is the second most-molded material after ABS, prized for transparency, impact resistance and thermal stability. MOLDITQUICK molds standard and modified PC on automated injection presses, with audited tooling partners and DFM.
Best-in-class transparency among transparent thermoplastics — optical and lighting parts need no painting.
Exceptional impact strength — the classic 'unbreakable' resin for housings, shields and lenses.
Thermal stability — parts keep working through wide temperature swings, including under-hood and lighting environments.
Modified compounds extend the range — PC/ABS for flow and cost, glass-fiber PC for stiffness, PC/PBT for chemical resistance.
Flame-retardant and UV-stabilized grades available for electronics and outdoor use.
Design freedom for large thin-walled parts — headlight lenses and covers are molded with balanced filling in multi-cavity tools.
Weld-line and gate optimization — for clear PC, gate placement is decided in DFM so flow marks stay off the optical path.
Insert and overmolding compatibility — PC overmolds onto metal inserts and TPE grips for sealed, durable assemblies.
FAQ
PC 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 PC 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.