Custom PTC solutions from prototype to mass production.
We deliver certainty, not just plastic parts. Partner with us to eliminate prototyping delays, supply chain gaps and quality risks through our seamless, precision workflow from prototype to mass production of plastic components.
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Tianrui Electronics has delivered reliable solutions to over 2,000 customers by bringing more than 50,000 custom part designs to life.
Partner with Tianrui Electronics to turn your concepts into custom injection molds and precision plastic components. Leverage our experienced engineering team and mature workflow for a seamless path from prototype validation to high-volume molding, ensuring stable quality, on-time delivery, and full visibility.
Build the Foundation for Flawless Parts. Secure high-quality, fully custom aluminum or steel molds. We guarantee tight tolerances (±0.02mm) and provide free mold flow analysis, ensuring your tool is optimized for performance, longevity, and cost-effective mass production.
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A versatile, dependable and scalable molding solution, widely adopted in modern manufacturing. With injection machines ranging from 90 to 1000 tons, we produce consistent, finely detailed plastic components for enclosures, structural assemblies and consumer goods across industries.
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Create integrated multi-material composite parts. Our multi-step molding process bonds plastic firmly onto substrates to enhance durability, ergonomics and product value. It eliminates secondary assembly, improves sealing and grip, while unlocking extensive freedom for aesthetic design.
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Encapsulate and protect critical components. Metal nuts, fasteners or electronic elements are pre-inserted and overmolded into plastic in one cycle. This process boosts structural strength, cuts down post-molding fastening work, and delivers reliable environmental protection for internal parts.
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Upload Your CAD FileAfter injection molding, plastic parts often require secondary operations to achieve final appearance, assembly, and functional requirements. These post-molding processes are carried out on finished molded substrates without reshaping the main plastic structure.
Streamline material selection for performance, compliance and budget. We support a wide portfolio of thermoplastics, elastomers and reinforced composites, each carefully evaluated to satisfy your mechanical, thermal and certification requirements. Work with Tianrui Electronics to select the right material matched to your application, delivering consistent quality, reliable dimensional performance and cost efficiency all the way from prototype validation to high-volume molding.
Known for its high strength, toughness, and good chemical resistance. Nylon (PA) is widely used in automotive components, electrical insulators, mechanical gears, and industrial fittings. It offers good wear resistance and can be reinforced with fibers for enhanced performance.
We deliver precision molded components and insert-molded solutions optimized for durability, thermal performance and cost efficiency. Supporting low-volume prototypes through full-scale production, we manage complex features, diverse engineering plastics and strict regulatory requirements for automotive, electronics, HVAC and industrial applications.
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Select the optimal mold design for your production volume, part complexity, and budget efficiency.
| Mold Type | Ideal Applications | Problem Solved | Key Advantages |
|---|---|---|---|
| Single-Cavity Production Mold | Low-volume runs, large plastic parts, complex designs requiring separate process control; prototype validation, pilot production, bridge tooling | Avoid the high upfront cost of multi-cavity molds and the risk of overproduction & excess inventory | Robust mold construction, excellent surface finish and dimensional stability. Simple molding adjustments and easy modification. Perfect for functional prototypes, trial runs and custom small-batch orders. |
| High-Efficiency Multi-Cavity Mold | Mass production projects with strict targets on piece cost and cycle time | Address the low throughput and high unit cost limitations of single-cavity tools | Produce multiple identical parts in one molding cycle to boost output and shorten lead times. Great for standardized components, effectively amortizing tooling cost for high-volume delivery schedules. |
| Stack Mold for Maximum Output | Thin-wall, high-volume consumer components such as containers and lids; projects with limited press availability or floor space constraints | Resolve low injection press utilization and factory space bottlenecks | Double cavity count without extra machine footprint, greatly raising hourly output. Delivers high ROI for stable, long-running mass consumer product programs. |
| Two-Color / Dual-Shot Injection Mold | Parts requiring multiple materials, varied colors, or soft-touch surfaces (rigid plastic + TPE/TPR) within one integrated component | Eliminate extra assembly labor, tolerance gaps and reliability failures from separately molded sub-parts | Combine hard engineering plastic and soft elastomer in one automated molding cycle with no secondary assembly. Improves part integrity, sealing, grip feel and enables advanced product design. |
Selecting the optimal mold material is critical to preventing premature failure, production downtime, and quality issues. Tianrui Electronics engineers the ideal material strategy for your project, balancing durability, precision, and cost-efficiency to ensure reliable performance from prototype to high-volume production.
Aluminum mold tooling is the strategic choice for accelerating product development and de-risking market entry. It enables up to 40% faster lead times and 15-25% lower initial tooling costs compared to steel, providing a cost-efficient path for prototyping, pilot runs, and low-volume production.
A key engineering advantage is its superior thermal conductivity, which allows for more even heat dissipation during molding. This results in reduced cycle times, enhanced dimensional stability, and minimized part warpage, ensuring greater consistency and less material waste for validation batches.
Steel mold tooling represents the definitive solution for high-volume production and demanding applications where tool longevity, part precision, and total cost of ownership are paramount. It provides unmatched durability, consistently delivering millions of parts with critical tolerances maintained under high-pressure cycling and abrasive material conditions.
The inherent hardness and wear resistance of tool steels ensure sustained performance in aggressive production environments. This results in superior part-to-part consistency, extended service life, and the lowest per-part cost over full production runs, making it the optimal choice for mission-critical components.
Stainless steel mold tooling delivers uncompromising performance for applications demanding superior corrosion resistance, absolute material purity, and stringent hygienic requirements. It provides an ideal solution for medical, pharmaceutical, and food-grade production where material inertness, cleanability, and long-term reliability are non-negotiable.
The inherent corrosion resistance of stainless steel eliminates oxidation and contamination risks, ensuring consistent part quality even after prolonged exposure to aggressive chemicals or sterilization cycles. This results in extended tool life, reduced maintenance costs, and guaranteed product purity for sensitive applications.
Eliminate prototyping failures and production delays. We utilize certified materials and advanced equipment to machine parts to exceptionally tight tolerances, ensuring a perfect fit, reliable operation, and compliance with the most rigorous standards for performance and durability.
Accelerate your project timeline with our streamlined workflow. From fast quoting to optimized production, we deliver high-quality parts under tight schedules, helping you hit critical milestones faster and seize market opportunities.
Tackle complex manufacturing challenges with a true partner. Our engineers deliver practical Design for Manufacturability (DFM) feedback and end-to-end technical support from design through delivery, reducing your development risks and ensuring a smoother production run.
Prototyping
Shorten development cycles and reduce risks related to material compatibility. Our rapid overmolding tools can deliver authentic, multi-material prototypes in weeks rather than months. Use production-grade substrate and overmold materials to test the adhesion, functionality, and tactile feel of your design, validating performance before committing to the high cost of production-grade tooling.
Designed for 1,000 to 5,000 cycles, our prototype tooling offers a reliable and cost-effective way to refine your overmolded designs and ensure market confidence.
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Launch your production with confidence. Our overmolding production molds are engineered specifically for continuous, high-volume manufacturing. Constructed from high-strength steel, these robust, multi-material molds ensure impeccable bonding integrity and consistent part quality over hundreds of thousands of cycles.
Designed for exceptional durability and precision, our production tooling can withstand more than 1 million cycles, enabling the on-time delivery of long-lasting, high-performance overmolded parts.
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Overmolding represents an innovation in multi-material manufacturing, seamlessly integrating different materials into a unified component to enhance functionality, durability, and user experience. By strategically bonding materials, this advanced process overcomes complex design challenges, enabling the creation of superior products that cannot be achieved through single-material manufacturing methods.
By combining the properties of different materials and establishing permanent bonds, even between materials capable of withstanding extreme conditions, overmolding extends product lifespan and eliminates potential points of mechanical failure.
Combining soft-touch surfaces with rigid substrates provides a comfortable, secure grip and intuitive interfaces, thereby improving both usability and safety.
Integrating multiple components into a single molding cycle reduces assembly steps, labor costs, and supply chain complexity, all while maintaining consistent quality.
Overmolding provides an inherent seal against moisture, chemicals, and harsh environments without the need for additional gaskets or seals, ensuring reliable performance.
Insert molding is an injection molding process in which prefabricated inserts (such as metal terminals, ceramic chips or thermal protection components) are pre-placed into the mold cavity before plastic injection. Molten resin is then injected into the mold and solidifies, bonding tightly with the inserts in one shot. This process provides reliable insulation, mechanical fixation and structural integration for the assembly.
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| Item | Insert Molding | Overmolding |
|---|---|---|
| Process | Single injection cycle to encapsulate metal / electronic components | Multi-step molding of soft material onto a rigid substrate |
| Core benefit | Eliminates weak joints and separate assemblies | Combines rigid structural support with soft tactile surface |
| Main advantages | Component integration & improved reliability | Multi-material properties & ergonomics |
| Best suited for | Electrical components, reinforced structural parts | Grips, seals, consumer products |
Industry: Heating Components
A heating equipment manufacturer required a rigid support bracket to securely hold PTC ceramic heating elements for desiccant dehumidifiers. We developed an insert molding solution that permanently encapsulates PTC chips, metal terminals and thermal fuses within a high-temperature resistant engineering plastic housing. This design delivers dependable electrical insulation, precise component positioning and excellent thermal cycling resistance, meeting RoHS compliance requirements.
At our factory, we build precision and durability into every custom plastic mold. We partner with you to turn your product concepts into reliable molding solutions, optimized for tight tolerances, stable cycle performance, cost efficiency, and your schedule from prototype validation to mass production.
Avoid costly mold revisions and delayed schedules. Our DFM analysis optimizes part geometry, wall thickness and draft angles before steel cutting. We identify sink marks, warpage and ejection risks upfront, delivering mold designs ready for reliable molding and stable mass production.
Control dimensional variation for high-accuracy plastic parts. Our high-precision CNC machining and EDM tooling deliver cavity accuracy within ±0.02 mm. Strict electrode management and mold polishing ensure consistent surface finish and repeatable part quality batch after batch.
Speed up your product launch from prototype to volume production. Our integrated workflow covers design, tool making, trial injection and sample validation in one team. We cut redundant handovers, compress mold trial cycles and help you reach market faster.
Count on stable performance throughout your product lifecycle. We select proper mold steel and apply professional heat treatment according to your production volume. Mold maintenance guidance and spare cavity service support continuous high-volume runs and reduce unexpected downtime.
We turn your product concept into reliable tooling solutions. Our mold engineering team delivers customized structural design, mold flow analysis and mold review, balancing molding stability, mold lifespan and mass production readiness. Early evaluation helps avoid mold defects and molding risks, shorten lead time, stabilize the yield of subsequent injection molding, and ensure on-time project delivery.
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