Custom Plastic Injection Mold Development Services
We provide high-quality injection mold solutions to our customers from worldwide with the support of our professional engineering team and advanced machining and inspection equipment.
15+ years of injection tooling development experience.
Strong Tooling Design Engineering Team & Skilled technicians.
Support prototype mold and mass production mold.
Capacity: 20~30 Sets of plastic injection molds per

Injection Mold making Experience
customers from worldwide
Injection Mold delivered per year
Mold making work shop
production workshop
mold making technicians
Successful Case Of Plastic Injection Mold Development
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Connector Overmolding MoldThe Precision Connector Overmolding Mold is engineered to manufacture sealed, reinforced electrical connectors by bonding rigid plastic substrates with soft elastomer overmolding. This high-precision
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Handle Overmolding MoldThe Handle Overmolding Mold is engineered for manufacturing high-performance, rigid-soft integrated handles across diverse industries. This specialized tooling combines a rigid substrate with a soft
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Cable Overmolding MoldThe Cable Overmolding Mold is engineered for the high-precision encapsulation of cable assemblies requiring robust strain relief, waterproof sealing, and electrical insulation. This industrial-grade
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Silicone Overmolding MoldThe Silicone Overmolding Mold (multi-material injection tooling) is custom-engineered for manufacturing integrated components that combine liquid silicone rubber (LSR) or solid silicone with rigid
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TPU Overmolding MoldThe precision TPU Overmolding Mold is engineered for high-performance, dual-material injection molding, enabling permanent molecular bonding between rigid substrates and thermoplastic polyurethane
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TPE Overmolding MoldThe TPE Overmolding Mold is engineered for high-precision multi-material injection molding. It bonds rigid substrates with soft-touch TPE layers through advanced single-shot insert molding or
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High-Speed Data Connector MoldThe High-Speed Data Connector Mold is engineered for ultra-precision injection molding of high-frequency signal connector housings used in compact, high-density electronic assemblies.. Optimized for
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Wire-to-Board Connector MoldThis high-precision injection mold is engineered for high-volume production of micro-pitch electrical connector housings. Designed for compact electronic systems, the mold architecture ensures
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Board-to-Board Connector MoldThe Board-to-Board Connector Mold is engineered for precision injection molding of high-density interconnect (HDI) connector housings. Designed for compact, multi-pin electronic assemblies, this
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PCB Connector MoldThe PCB Connector Mold delivers high-precision injection molding solutions for board-to-board, wire-to-board, and I/O connector housings. Engineered for high-speed, multi-cavity mass production, this
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Type-C Connector MoldThe Ultra-Precision Type-C Connector Mold is engineered for high-speed, automated injection molding of next-generation USB Type-C components. It delivers exceptional dimensional control for
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USB Connector MoldThe USB Connector Mold is a high-precision injection tooling solution engineered for manufacturing plastic housings used in USB-A, USB-C, and Micro USB interfaces. Designed for tight-tolerance
Our Workflow of Injection Mold Development Service
At Protech, We always develop high-quality plastic injection mold based on our systematic mold manufacturing workflow, which generally consist of six key stage:

Product Analysis and DFM
Based on customer’s product drawing, material specifications, and functional requirements. Our engineering team performs a rigorous Design for Manufacturability (DFM) review to identify potential challenges and ensure the part is optimized for the molding process
Tooling Design(3D&2D)
Following the confirmed DFM analysis, our tooling designers create a complete 3D drawing of the mold, detailing every core, cavity, slider, and inserts. After the 3D drawing of the mold is approved by customer, Engineers will create corresponding 2D technical drawings for every single mold component.


Precision Mold Machining
With the design finalized. We purchase raw steel material and start mold fabrication. The mold Components such as cavities and cores are manufactured under processes include Precision CNC milling, Electrical Discharge Machining (EDM), and Wire cut Electrical Discharge Machining (WEDM) ,Polishing technology.
Mold Assembly & Mold Fit
Once all mold components—including cavity, core, ejector pins, and cooling lines are machined and inspected, our skilled technician assemble the mold parts meticulously into a perfect mold. Mold fitting tests and functional tests are performed to prevent any defects during plastic injection molding production.


Trial Run and Optimization
Trial runs are conducted on our high-precision injection molding machines. Injection parameters such as temperature, pressure, injection speed, and cooling time will be recorded clearly. First Article Inspection Report (FAI) will be provided against product specification. If any slight deviations or defects are found, we making minor adjustments to the mold or process to ensure sample dimensions and appearance to meet the spec finally. and ensure the mold is in good status for mass production.
Mold Qualification and Delivery
After finished all qualification process and the mold is ready for mass production. It is customer’s decision whether to ship the high-quality injection mold to the customer site or keep the mold in Protech for mass production.

Request for injection mold quotation
Our Customized Injection Mold Solutions Applications
Our customized injection mold solution are widely used in automotive, communication electronics, medical, aerospace, consumer industries. Here is a real application case for example.
Real Case Study:
- Customer: Tier 1 supplier from automotive industry
- Project name: High-Volume New Energy Vehicle (NEV) Wiring Harness Seal Cover
- Mold Structure: 4-Cavity Hot Runner Production Mold
- Annual Volume: 2,000,000 Parts (2KK pcs)
What we did:
- Speed to Market: With a fully equipped in-house tool room, we delivered T0 samples just 20 days after project kickoff.
- Reduce Resin Material waste: By optimizing hot runner design, the runner weight reduced from 8g to 2g.
- Increased Operational Efficiency: By using quick changeover mold structure, we shorten the changeover time from 4hour to 0.5 hour.





As a direct source of precision plastic injection mold manufacturer, We bring a tangible competitive advantage to your supply chain. Quality, cost, time, is the key.
7/24 Uninterrupted Support & Lightning-Fast Response
High Lights:
- We provide 24/7 service response.
- Our average response time to customer inquiries is 4 to 8 hours, significantly under the industry standard of 12 to 24 hours
Case Study: For a medical device manufacturer in Eur facing a sudden production halt, our team was online within 2 hours, and guided their team through a temporary polishing fix, preventing 50KUSD capacity loss.
Faster Time-to-Market with Integrated Manufacturing
- Advantages: Leveraging our integrated precision mold manufacturing center, we streamline the entire workflow. This integration eliminates outsourcing delays .
- The Result: Our average mold development lead time is just 4 to 6 weeks. This is a significant reduction compared to the industry average of 6 to 8 weeks.
Case Study: For a recent consumer electronics project requiring a family mold of 8 cavities, we delivered T1 samples in just 28 days, enabling the client to hit their product launch window at a major international trade show.
Cost Control & Efficiency:Engineering Savings from Day One
Innovations:
- Our experienced design team applies DFM (Design for Manufacturing) principles from the initial concept stage, optimizing part design, reducing cycle times, and minimizing material waste to lower the total cost of the mold and part.
Case Study: A leading commercial drone(UAV) manufacturer approached us with a design for a lightweight landing gear arm. Their initial design required a 60-second cycle time and used a high-cost carbon-fiber blend.
Our Solution:
Design Optimization: We suggested minor structural rib modifications to improve flow, allowing us to reduce the wall thickness by 15% without compromising impact strength .
This modification shortened the cooling time dramatically saved raw material.
The Result: We reduced the injection cycle time by 20% (from 60s to 48s) and saved 12% on plastic material usage per part. For a production volume of 500,000 parts annually, this translated to over $80,000 in cost savings for the client.
Uncompromising Quality: Sustained <0.8% Complaint Rate
Breakthroughs:
- From 2023 to 2025, we have maintained an average annual customer complaint rate of below 0.8% .
- This consistency is achieved through rigorous in-process inspection and a zero-defect mindset.
Case Study:
A major Tier-1 automotive supplier from North American required a complex Class "A" surface bezel.
Our Approach: We utilized advanced mold flow analysis to optimize the hot runner gate position and implemented a conformal cooling circuit to ensure uniform temperature distribution.
The Result: In the first production run of 50,000 parts, we achieved 0 PPM (Parts Per Million) . We have since shipped over 2 million parts across three program years without a single dimensional or cosmetic rejection, solidifying their just-in-time assembly line reliability.
FAQ
Q1. What information do you need to provide a competitive mold quote?
A: To provide an accurate quotation and feasibility analysis, we typically require the following:
3D Design Files: Preferred formats include STEP (.stp) or IGES.
2D Drawings: If available, specifying critical tolerances, material specifications, and surface finishes.
- Annual Volume: Helps us determine the appropriate cavity count and steel type (e.g., hardened steel for high cavitation vs. pre-hardened for prototyping).
- Resin Type: The specific plastic material (e.g., ABS, PC, Nylon 66+GF30) dictates shrinkage rates and mold design requirements.
Q2. What is the typical lead time for an injection mold?
A: Lead times vary based on mold complexity and current workload, but our standard timelines are:
Simple Molds (Prototype/Family Molds): 4–5 weeks
Medium Complexity (Multi-slide/Hot Runner): 5–6 weeks
High Complexity (Multi-cavity/Unscrewing/Stack Molds): 6–8 weeks
We utilize real-time project management software to provide daily updates on manufacturing progress.
Q3. How do you handle design changes during the mold-making process?
A: We follow an Engineering Change Notification (ECN) protocol. If a design change is requested:
Feasibility Analysis: Our engineering team simulates the impact on the mold design.
Impact Assessment: We provide a clear report on the cost and timeline implications before proceeding.
Implementation: Changes are made in the digital model and verified through a secondary design review to prevent errors. After all changes confirmed, we start modifications on the mold.
Q4. What are your standard payment terms for international clients?
A: Our standard payment terms are typically 50% deposit with the Purchase Order to commence engineering and material procurement, 40% upon FAI approved, and 10% balance before shipment (B/L copy) . For long-standing clients or large-volume contracts, we can discuss other alternative terms.
Q5. What after-sales support and maintenance services do you provide for your injection molds
A: Yes, we offer full after-sales support to ensure your molds operate at peak performance throughout their lifecycle. Our goal is to minimize downtime and extend tool longevity through proactive maintenance and rapid technical assistance.
Here’s an overview of our standard after-sales services:
1. Comprehensive Warranty Coverage
Warranty Period: We provide a standard warranty of 12 to 24 months against any defects in materials or workmanship.
Scope of Coverage: This includes free repairs or replacements for issues such as premature wear, cooling system leakage, or misalignment that occur under normal operating conditions.
2. Proactive Maintenance & Repair
Preventative Maintenance: We offer scheduled inspections, cleaning, and lubrication services. This proactive approach helps prevent unexpected failures, reduces cycle time deviations, and extends the mold’s total lifespan. Common tasks include replacing worn ejector pins and re-polishing cavity surfaces.
Corrective Repairs: In the event of damage from misuse or unexpected wear (e.g., broken cores, scratched surfaces), our team can perform precision repairs. After the warranty period, these services are typically billed at an hourly rate or a fixed project fee.
3. Expert Technical Support
Remote Troubleshooting: Our engineers are available to provide remote guidance to resolve production issues like part warpage, sticking, or flash.
Performance Optimization: We can also recommend design adjustments, such as optimizing gate sizes or cooling channel layouts, to improve cycle times and part quality.
4. Genuine Spare Parts Supply
Availability: We maintain an inventory of critical, high-wear components for your molds, including custom inserts, sliders, and heating elements.
Fast Lead Times: Standard spare parts can typically be shipped within 3–5 days, while custom-manufactured parts may require additional lead time depending on complexity.
5. Mold Upgrades & Retrofitting
Material Enhancements: We can upgrade existing tools with more durable materials, such as hardened steel, to better withstand high-abrasion resins.
Automation Integration: As your production needs evolve, we can retrofit molds with features for automation, such as robotics for faster part ejection or sensor integration for Industry 4.0 monitoring.
Ultimately, our after-sales service is designed to be a true partnership, ensuring your investment continues to deliver high-quality returns for years to come
Q6. How do you handle technical communication across different time zones?
A: We have a dedicated project management team available via email, Zoom, Teams or WhatsApp. We typically respond to technical queries within 12-24 hours. For urgent issues during your production run, we can arrange remote video assistance to guide your technicians through troubleshooting steps.
We're well-known as one of the leading injection mold manufacturers and suppliers in China. With over 15 years' experience, we warmly welcome you to buy high quality injection mold at competitive price from our factory. Contact us for more details.
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