From 1 to 1+ Million Parts. We Scale With You. Your one-stop manufacturer for design, prototype, precision molding, surface finishing, and final assembly.
Custom plastic injection molding is a manufacturing process in which plastic materials are heated until molten and then injected into precision molds under high pressure. After cooling and solidifying, the mold opens to produce highly accurate and repeatable plastic components with complex shapes and fine details.
Our custom plastic injection molding service goes beyond simple part production. We work closely with customers to optimize product design for manufacturability, recommend suitable engineering plastics, and ensure stable production from prototype to mass manufacturing. Whether you require a small batch of functional prototypes or large-scale production, we deliver consistent quality, tight tolerances, and reliable lead times to support your product development and market launch.
Engineering-driven manufacturing for complex geometries. From tight-tolerance functional parts to multi-material consumer products, we deliver consistent quality at scale.
Start with a signed NDA to protect your IP. We provide free Design for Manufacturability (DFM) analysis to optimize wall thickness and draft angles, plus expert advice on resin selection.
Validate your design before cutting steel. We offer Vacuum Casting, 3D printing and CNC machining to test form, fit, and function. We support Low-Volume Trial Runs for market verification.
In-house tooling powered by Makino & Mikron high-speed CNCs. We fabricate durable SPI Class 101-103 molds capable of μm-level accuracy and millions of shots.
90T–1000T press capacity (Sumitomo/Fanuc). We utilize decoupled molding processes to ensure dimensional stability. ISO Class 7/8 Cleanroom available for medical parts.
A true one-stop solution. In-house Spray Painting, Silk Screening, Pad Printing, and Ultrasonic Welding. We handle full mechanical assembly to reduce your supply chain complexity.
Zero-defect commitment. We utilize CMM, RoHS 2.0 Testers, and Stress Testing equipment to verify every dimension. Full IPQC reports and Material Certifications (COA) provided with shipment.
Custom plastic injection molding is a reliable manufacturing method for producing high-quality plastic components across many industries. It offers key advantages such as cost efficiency, lightweight parts, reduced material waste, and the ability to create complex and customized shapes with consistent precision.
We provide tailored molding solutions to meet the needs of different applications, from functional prototypes to high-volume production. By combining material expertise, precision tooling, and strict quality control, we ensure every component meets the required performance, durability, and industry standards for your project.
Enclosures for audio devices, wearables, and peripherals. Expertise in 2K molding and Insert Molding to integrate electronics seamlessly.
| Category | Components |
|---|---|
| Communication Devices | Phone Case, MacBook Cover, Tablet Case, Charger Housing |
| Wearable Tech | Watch Case, Smartwatch Bezel, Fitness Band Clasp, Earbud Charging Case |
| Audio-Visual Equipment | VR/AR Structural Parts, Speaker Grill Frame, Remote Control Buttons, Projector Lens Cover |
| Gaming Accessories | Game Controller Grip, Headset Ear Cushion Frame, Console Vent Grille, Charging Dock Base |
Ultra-lightweight headsets and controller shells requiring thin-wall molding and premium surface finishing (Soft-touch painting, Laser etching).
| Category | Typical Components |
|---|---|
| Headset Structural Parts | Main Chassis, Front Faceplate, Heat Dissipation Vents, Battery Housing |
| Optical & Sensor Mounts | Lens Holder Rings, Pancake Lens Frames, Camera/Sensor Brackets, IPD Adjustment Mechanism |
| Controller & Interaction | Controller Grip Shells, IR Tracking Rings (Infrared Transparent), Trigger & Bumper Buttons, Haptic Feedback Housing |
| Wearable Ergonomics | Face Gasket Frames (Soft-touch), Headstrap Buckles, Audio Arm Housing, Nose Pad Bases |
Precision interior parts, connectors, and under-the-hood components. Focus on high-heat resistance and structural integrity using PA66+GF and PPS. PPAP Level 3 documentation available.
| Category | Components |
|---|---|
| Interior Trim | Dashboard Panel, Door Armrest Trim, Center Console Knob Base, Seat Adjustment Button |
| Exterior Trim | Bumper Clip, Rearview Mirror Housing, Grille Accent, Window Seal Gasket Base |
| Functional Components | Wire Harness Clip, Oil Reservoir Cap, Brake Fluid Cup, Sensor Housing |
| Electronic System Parts | EV Charging Port Cover, Instrument Cluster Bezel, Steering Wheel Button Pad |
Medical-grade housings, surgical tool components, and micro-fluidic consumables. Produced in Class 7/8 Cleanrooms using biocompatible resins (PC, PP, PEEK).
| Category | Components |
|---|---|
| Diagnostic Equipment | Reagent Tube Rack, Sampling Cup, Testing Instrument Keypad, Cuvette Holder |
| Care Products | Infusion Pump Housing, Nebulizer Nozzle, Monitor Control Knob, Hemostat Handle Grip |
| Surgical Aids | Thermometer Shell, Blood Pressure Cuff Connector, Wheelchair Armrest Cover, Sterilization Case Latch |
| Therapeutic Devices | Trocar Sleeve, Surgical Tray Divider, Endoscope Handle Grip, Suture Pack Clip |
Casings, gears, and brackets for power tools and instrumentation. Engineered for impact resistance and chemical durability.
| Category | Components |
|---|---|
| Power Tool Components | Drill Handle Grip, Grinder Guard, Sander Pad Frame, Impact Wrench Housing |
| Measuring Instruments | Caliper Housing, Level Vial Holder, Gauge Face Plate, Tester Probe Cover |
| Machinery Parts | Conveyor Roller Sleeve, Hydraulic Cylinder End Cap, Pneumatic Valve Knob, Gearbox Seal Cover |
| Workstation Accessories | Tool Cabinet Drawer Slide, Bench Vise Handle Grip, Tool Belt Clip, Parts Bin Divider |
Fire-retardant (V0) housings for smart switches, cameras, and sensors. High-gloss finishes with UV stability for long-term home use.
| Category | Components |
|---|---|
| Smart Controls | Smart Thermostat Housing, Voice Assistant Speaker Shell, Light Switch Panel, Remote Control Casing |
| Security Devices | Smart Doorbell Shell, Motion Sensor Cover, Camera Mount Bracket, Lock Keypad Frame |
| Environmental Regulation | Air Purifier Filter Frame, Humidifier Water Tank, Smart Valve Knob, Dehumidifier Control Panel |
| Cleaning Equipment | Robot Vacuum Shell, Dust Bin Assembly, Mop Attachment Frame, Filter Replacement Cover |
“My colleagues from large CE brands highly recommended Topfire. In our startup project, Topfire acted as a true partner, not "just a vendor." The well-managed team has a long-term vision, excellent communication, and quickly resolves issues. They're smart, professional, and fun. I'm deeply grateful to work with them.”
“We have established business relationship with Topfire since 5 years ago. No matter or order is big or small, we have always felt their exquisite, considerate service and got their best assistance every time. In our entire product supply chain, Topfire is one of our strategic partners in China. Here, we strongly recommend this company to all friends in the industry.”
“Slimcase has worked with Topfire on multiple important phone case projects. We are happy with the product quality because of the high-skilled engineers and up-to-date machinery. Moreover, support from the team is outstanding. Topfire is becoming our strategic development partner in China.”
Topfire offers a wide range of available injection molding materials, covering core categories such as general materials, engineering materials, specialty engineering plastics, and modified reinforced plastics.
We can precisely match materials to customer needs and support procurement from customer-specified suppliers to ensure optimal compatibility between materials and injection molded parts.
Post-injection molding post-processing is crucial for achieving the ultimate performance and appearance of plastic parts. It optimizes surface texture, enhances durability, and meets industry compliance requirements.
Topfire offers post-processing services such as painting, pad printing, antimicrobial treatment, CNC precision machining, and wear-resistant/UV-resistant coatings to meet the plastic part needs of various industries.
| Category | Specific Process | Key Features | Industry Standards |
|---|---|---|---|
| Appearance Enhancement | Spray Coating (Painting) UV / PU / Soft-Touch |
Custom color matching (Pantone/RAL) Excellent surface texture control |
Refer to: IATF 16949 Compliance: RoHS 2.0 |
| Pad & Screen Printing Logo & Marking |
Multi-color printing supported High precision alignment |
Medical: ISO 10993-1 Food Contact: FDA |
|
| Plastic Plating Chrome / NCVM |
Metallic look for plastic parts Stable adhesion performance |
Test: ASTM D3359 EU RoHS 2.0 Compliant |
|
| Performance Enhancement | Hard Coating Protective Finish |
Enhanced scratch resistance Protects against daily wear |
Hardness Test: ASTM D3363 Abrasion: ASTM D4060 |
| UV-Resistant Coating Outdoor Protection |
Prevents yellowing and fading Weatherability tested |
Test Std: ASTM G154 | |
| Dispensing & Sealing Waterproofing |
Gasket dispensing for sealing Dust & moisture protection |
Rating: IEC 60529 (IPXX) UL 50E Compliant |
|
| Structural Finishing | CNC Precision Machining Secondary Operations |
Drilling, tapping, and facing High Precision: ±0.01mm |
Aerospace: AS9100 Medical: ISO 13485 |
| Deburring & Polishing Surface Refinement |
Removes flash and sharp edges Smooth surface finish |
Cleanliness: ISO 16232 Biocompatibility: ISO 10993 |
|
| Insert Installation Heat Staking |
Secure metal-to-plastic bonding High pull-out force |
Automotive: IATF 16949 Quality: ISO 9001 |
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