Engineering Your Parts.
Building Your Confidence.
Based in Shenzhen, RJC brings over 20 years of manufacturing experience to custom tooling and plastic parts, with a focus on high-temperature injection molding.
From prototypes to production.
Connected engineering and manufacturing.
ISO 9001 · ISO 13485 · IATF 16949
In-house mold manufacturing and injection molding.
Company Overview
Shenzhen RJC Industrial Co., Ltd. supports custom plastic and metal parts from prototype development through production. With over 20 years of manufacturing experience, RJC combines engineering support, mold manufacturing and injection molding at its Shenzhen facility.
High-temperature plastic injection molding is a key focus, supported by CNC machining, rapid prototyping and secondary operations to meet broader project requirements.
Support Across Project Stages
Prototypes, low-volume orders and repeat production as your project develops.
Beyond Molded Parts
Surface finishing, component assembly and custom packaging for delivery.
Manufacturing in China. U.S. Project Support.
RJC American Inc. provides an additional point of contact for communication and project coordination with the Shenzhen manufacturing team.
Factory Tour
A closer look at our tooling, molding and inspection facilities.
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Mold Manufacturing
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Injection Molding
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Quality Inspection
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Tool Assembly
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Packaging & Shipping
Certifications
Certified quality management systems supporting custom manufacturing and medical device component projects.
ISO 9001
Process control, consistent quality and continual improvement across manufacturing operations.
ISO 13485
Documented quality management supporting medical device component manufacturing requirements.
Quality & Traceability
Defined inspection points and production records, aligned with your part requirements.
Critical dimensions, appearance criteria and reporting requirements are agreed during project planning.
Material Verification
Review the specified resin grade, supplier documentation and material lot information against project requirements.
Tooling & Sample Inspection
Check tooling and trial parts, with dimensional results supporting sample review and any required corrections.
Production & Final Checks
Inspect agreed dimensions and visual features during production and before shipment, following the inspection plan.
Batch Records & Traceability
Maintain agreed links between material lots, production batches and inspection records for project traceability.
For high-temperature plastics, drying, molding conditions and dimensional conditioning are reviewed alongside the material grade and application requirements.
From CAD to Production
A clear sequence of reviews and approvals keeps tooling, samples and production aligned with your requirements.
Share Your Requirements
Send CAD files, drawings, material preferences, expected quantities and operating conditions.
Result: Defined project scope.DFM Review & Quotation
Review manufacturability, tooling options and key risks before confirming cost and schedule.
Result: Agreed manufacturing approach.Mold Design & Build
Develop the mold design for approval, then machine, fit and assemble the tooling.
Result: Tooling ready for trials.Trial & Sample Approval
Evaluate trial parts, review inspection results and complete agreed adjustments before production release.
Result: Approved samples and criteria.Production & Inspection
Produce parts using the agreed process, with in-process checks and final inspection.
Result: Inspected production parts.Finishing & Delivery
Complete specified secondary operations, assembly and packaging, then coordinate shipment.
Result: Parts prepared for delivery.Engineering & Manufacturing
Connecting part design, in-house tooling and molding to resolve manufacturing issues before they reach production.
DFM & Material Review
Assess wall thickness, draft, shrinkage and critical features. Review resin grades against temperature, load and chemical exposure.
In-House Mold Manufacturing
Coordinate mold design, CNC machining, EDM, fitting and assembly, with direct feedback between tooling and molding teams.
High-Temperature Plastic Molding
Develop tooling and molding conditions around the selected resin, including insert molding, overmolding and two-shot project requirements.
Prototyping & Secondary Operations
Support development with CNC machining and rapid prototypes, followed by specified finishing, assembly and custom packaging.
Frequently Asked Questions
What to know before starting a tooling or custom parts project with RJC.
Where is RJC located, and is U.S. support available?
RJC is based in Shenzhen, China, where tooling and manufacturing operations are located. RJC American Inc. provides an additional point of contact for communication and project coordination with the Shenzhen team.
What information is needed for a quotation?
Send your 3D files, available 2D drawings, material grade, expected quantities and delivery requirements. Include critical tolerances, appearance criteria and operating conditions. If material selection is still open, describe the temperature, loads and chemical exposure involved.
Can RJC supply molds separately from molded parts?
Yes. Projects can cover mold manufacturing, molded parts production, or both. For tooling delivered to another facility, machine specifications, tooling standards, documentation and sample approval requirements are reviewed before mold design begins.
Do you support prototypes and low-volume production?
Yes. RJC supports prototypes, low-volume orders and repeat production. CNC machining, 3D printing and injection molding options are reviewed against the material, geometry, quantity and purpose of the parts.
How are samples approved before production?
The sample approval scope is agreed during project planning. Trial parts and inspection results are submitted for review, with any required tooling or process adjustments addressed before production release. Functional and assembly checks should be identified early so responsibilities and acceptance criteria are clear.
What quality documentation can be included?
Documentation can include material certificates, dimensional inspection reports and agreed batch records. Specify any traceability, reporting or customer-specific requirements during quotation so the documentation package can be confirmed within the project scope.
Discuss Your Next Project with RJC
Share your part files and application requirements. Our team will review manufacturability, tooling options and the production scope.
What to Send
- 3D files and available 2D drawings
- Material grade or application conditions
- Expected quantities and target schedule
- Critical dimensions and quality requirements
Share your available files, even if some project details are still being finalized.