SERVICES
PVC Injection Molding
Most molders avoid PVC: it decomposes above ~200 °C, releases corrosive HCl gas and demands a narrow 160–190 °C window. We run it daily — on corrosion-resistant tooling across our automated presses — for functional, structural and aesthetic parts, from low-volume bridge runs to high-volume production.
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.
Decomposition & mold corrosion
Above ~200 °C PVC releases HCl — the part browns, and the acid eats standard mold steel, so a short thermal excursion damages both the part and the tool.
Plasticizer migration
In flexible grades, plasticizers can migrate to the surface over time — softening the part, fogging finishes and attacking adjoining materials it touches.
Silver streaks / burning
Trapped HCl and moisture flash at the cavity surface.
Plate-out
Additives deposit on the mold, dulling surfaces over time.
Weld lines
Meeting melt fronts fuse weakly, especially in rigid PVC.
Short shots
Narrow window plus hesitation leaves cavities partially filled.
WHAT WE OFFER
The Route That Fits Your Order
PVC Grades & Compounds We Mold
PVC is a family of materials, not one resin — the grade family you pick sets stiffness, flexibility, heat resistance and cost. MOLDITQUICK (Dongguan Guohong Precision, 10000 m², 280 staff) runs stabilized compounds under ISO9001 / IATF16949 control.
Rigid vs Flexible PVC: Which Do You Need?
PVC is an economical option for high-volume, complex shapes — and the rigid/flexible split decides everything from tooling to tolerances. Here is the decision.
PVC Processing Parameters We Control
PVC's window is the narrowest of commodity plastics — melt above ~200 °C begins thermal decomposition (HCl release). Values per published PVC molding data; MOLDITQUICK uses stabilized compounds and chrome-plated molds.
| Parameter | Recommended Range | Why It Matters |
|---|---|---|
| Barrel temperature | 160–190 °C | Above ~200 °C PVC decomposes — the window is narrow and must be held precisely. |
| Mold temperature | 30–60 °C | Cooler molds protect the material and shorten cycle time. |
| Thermal stabilizers | Required (lead-free systems) | Stabilizers absorb HCl and protect both part and machine from corrosion. |
| Mold surface | Chrome-plated / corrosion-resistant | Degradation by-products attack mold steel — chrome plating extends tool life. |
| Mold shrinkage | 0.2–0.5 % | Low and predictable for vinyl molding. |
| Venting | Generous at the parting line | HCl and trapped gases must escape to avoid burning and silver streaks. |
| Screw & barrel | Corrosion-resistant steel | HCl by-products attack standard screws; special alloy barrels extend life. |
Where PVC Injection Molding Pays
Automotive & EV
Dashboard vent slats, electrical grommets, headlight washer jets, gear shift knobs and window switch bezels.
Consumer electronics
USB flash drive cases, tablet back covers, wireless router bodies and portable charger casings.
Outdoor & sports
Bicycle light housings and mudguards, ski goggle frames, swimming goggles and kayak seat adjusters.
Personal care
Mascara tubes, lotion pump heads, lipstick mechanisms and shaving razor handles.
Construction & fittings
Cable conduit fittings, junction boxes and trim profiles that use PVC flame and chemical resistance.
Medical & lab
Tubing connectors, valve bodies and housings in grades meeting your biocompatibility spec.
Everyday goods
Toys, handles, knobs and grips where PVC feel and cost beat other plastics.
FAQ
PVC 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 PVC 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.