Custom Plastic
Injection Molding
ManufacturerCustom plastic parts with direct factory support—from DFM and in-house mold making to injection molding production.
In-House Mold MakingEngineering SupportQuality-Focused ProductionShenzhen, ChinaAn Injection Molding Manufacturer with In-House Tooling
Explore the factory behind your parts. RJC brings mold manufacturing, injection molding, and part inspection together at our Shenzhen facility.
Injection Molding Workshop
Mold Manufacturing Workshop
Quality Inspection Room
[21] Years Manufacturing Experience[10000] m² Factory Floor Space[63] Injection Molding Machines[100-1000] T Clamping Force RangeCustom Injection Molding Capabilities
From single-material components to soft-touch grips and integrated metal inserts, choose a molding process that fits your part’s function and assembly requirements.
Plastic Injection Molding
Custom thermoplastic parts manufactured to your design, with tooling and production options matched to your project.
Housings, covers, brackets, and functional components.Explore Injection Molding
Overmolding
Mold an additional material over a substrate to add grip, cushioning, or sealing features to your component.
Soft-touch handles, protective surfaces, and integrated seals.Explore Overmolding
Insert Molding
Mold plastic around pre-positioned inserts to integrate fastening, electrical, or structural features into one part.
Threaded inserts, electrical contacts, and metal-reinforced parts.Explore Insert MoldingProduction Support at Every StagePrototype Parts Low-Volume Production Mass Production
Engineering Support & In-House Mold Manufacturing
Resolve manufacturing concerns before cutting steel. Our engineering and tooling teams work together to turn your CAD design into a mold ready for production.
DFM Review
Review wall thickness, draft, undercuts, and critical dimensions to identify tooling and molding risks early.
Mold Flow Analysis
Where needed, evaluate filling behavior, weld lines, and air traps to guide gate placement and mold design.
Mold Design & Making
Develop the cavity layout, cooling, and ejection system around your part geometry and production requirements.
Mold Trials & Adjustments
Evaluate trial samples and refine the tool against agreed requirements before production approval.
Quality Control from Tooling to Production
Quality starts with clear requirements. Our team reviews critical dimensions, appearance standards, and inspection needs before tooling and carries those requirements through production.
Tooling Verification
Check key mold dimensions, fit, and moving components before trial runs to identify issues that could affect the molded part.
Sample Inspection
Inspect trial samples against drawings and agreed acceptance criteria, with results supporting adjustments and customer approval.
In-Process Checks
Check dimensions and appearance at agreed intervals, and monitor molding conditions to identify variation during production.
Final Inspection & Release
Complete final checks against the agreed inspection plan and confirm quantity, labeling, and packaging before shipment.
Inspection documentation matched to your project. Share your reporting and traceability requirements during quotation so the scope can be agreed before production.
From CAD Review to Delivered Parts
A clear path from your initial requirements to production, with defined review and approval points along the way.
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Project Review
Share your CAD files, material, quantities, and key requirements so we can assess the project scope.
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DFM & Quotation
Review manufacturing feedback and confirm tooling, part pricing, and the proposed schedule before work begins.
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Mold Manufacturing
After mold design approval, our tooling team builds the mold and prepares it for initial trial runs.
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Sample Approval
Evaluate trial samples and inspection results. Any agreed adjustments are addressed before production release.
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Production & Delivery
Approved parts move into production, followed by final inspection, packaging, and shipment arrangements.