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Custom High Precision Multi Cavity Hot Runner Plastic Injection Mold

Our custom plastic injection molds are precision-manufactured tooling to mass-produce consistent plastic parts. We complete DFM review, mold design, CNC machining, polishing, assembly and mold testing in-house.

We build single cavity, multi-cavity, hot runner, cold runner, insert molding and overmolding molds. Mold steel options include P20, 718H, NAK80, S136, H13 to match different plastic materials and expected mold life. Suitable for ABS, PP, PC, PC+ABS, PA66, POM, TPU, PMMA and more.

Strict tolerance control, fine surface finish (texture, mirror polish available). Widely used for automotive, electronic housing, home appliance, new energy, medical and consumer plastic products. ISO9001, IATF16949 compliant upon request

Product Specifications

Custom Plastic injection mold Manufacturing

Lead Rubber is a professional manufacturer specializing in molded rubber & plastic components and custom mold fabrication.

We design and build custom molds for a wide range of rubber and plastic materials based on customers’ drawings and specifications. We deliver one-stop OEM & ODM solutions for global buyers.

OEM Services and Mold Development

We provide full-service OEM solutions for molded rubber and plastic components. With rich experience in custom manufacturing, we can produce parts strictly according to your drawings, samples or technical specifications, including O-rings, seals, gaskets, bumpers and other custom molded items.

Our in-house mold workshop supports complete mold development from design, CNC machining, trial testing to final validation. Custom molds can be built for various rubber and plastic materials such as EPDM, NBR, FKM, Silicone and engineered plastics.

Whether you need a new mold for prototype sampling or mass production tooling, our engineering team will work closely with you to control quality, lead time and cost. We deliver reliable one-stop custom molding service for global buyers.

Quality Control and Testing for molds

Strict quality control procedures are implemented throughout the entire mold manufacturing process, from design review, CNC machining, heat treatment to final assembly.

Every mold will undergo rigorous inspection and bench testing before shipment. We check mold dimensions, surface finish, ejection system and sealing structure to ensure precision and stability. Trial molding is carried out to verify part quality, dimensional accuracy and material compatibility for rubber or plastic compounds.

Any defects will be corrected during the sampling stage. Only qualified molds are approved for mass production. Our QC team maintains complete inspection records, helping minimize production risks and guarantee consistent performance for your molded partst.

Packaging and Delivery Preparation

Lead Rubber offers packaging options for international shipments, including PE bags, export wooden crate, and palletized packaging where required. Customized packaging, logo printing, and product labeling can be discussed according to order quantity and customer requirements.

Packaging methods are selected according to the product type, shipment method, and destination requirements. Please confirm any special packaging or labeling instructions before placing an order.

Frequently Asked Questions

Q1: What is plastic injection mold?

A: Plastic injection mold is precision tooling for mass production of thermoplastic parts. Molten plastic is injected into the mold cavity, cooled and shaped into finished components.

Q2: What services do you provide for injection molds?

A: We provide full service including DFM analysis, mold design, CNC machining, EDM, wire cutting, polishing, mold trial, mold revision and maintenance. We also make rubber molds.

Q3: What mold steel options are available?

A: P20, 718H, NAK80, S136, H13, 420SS. We select steel grade according to plastic material, required mold life and surface requirement.

Q4: What plastic materials can your molds work with?

A: ABS, PP, PC, PC+ABS, PA66/Nylon, POM, TPU, PMMA, PET, HDPE and other thermoplastics.

Q5: What mold types can you build?

A: Single-cavity, multi-cavity, hot runner, cold runner, insert molding, overmolding, slider and lifter molds.

Q6: What is your mold lead time?

A: Simple single-cavity mold: 3–4 weeks for T1 sample. Standard multi-cavity mold: 4–6 weeks. Complex hot runner / high-precision mold: 6–10 weeks. Rush service is available.

Q7: Can you do overmolding and insert molding?

A: Yes. Combined with our rubber molding capacity, we support plastic-rubber overmolding and insert molded assemblies.

Q8: What surface finishes can you offer?

A: Matte texture, chemical texture, mirror polish, diamond polish, laser engraving and custom etching.

Q9: Can you produce molded parts after mold completion?

A: Yes. We can provide mold + injection molded parts together. We also produce custom rubber seals, gaskets and rubber-to-metal bonded components.

Q10: What certifications can you supply?

A: ISO9001 and IATF16949 documents are available upon request.

Q11: Will you support mold modification after sampling?

A: Yes. We offer mold adjustment and modification service based on your sample feedback.

Request a Quote for mold

Looking for custom plastic injection moldtool  Contact Lead Rubber to discuss drawings, mold steel, cavity design and OEM tooling needs.

Please provide 2D/3D drawings or samples, cavity quantity, mold steel, rubber material, application and special requirements for quotation.

Contact Person: Sunny                              
Tel: 0086-13400616316   
WhatsApp: 0086-13400616316
Email: sales1@leadindustryproducts.com

Contact Person: Lucy

Tel: 0086-13328793979

WhatsApp: 0086-13328793979

Email: sales4@leadindustryproducts.com

Contact Person: Nana

Tel: 0086-15872688050

WhatsApp: 0086-15872688050

Email: sales2@leadindustryproducts.com

Pricing Notice: The displayed price is for reference only. The final quotation depends on product design, material selection, dimensions, tooling requirements, order quantity, surface treatment where applicable, and packaging specifications.