Precision Plastic Injection Molding Services
High-Quality Custom Plastic Parts with Consistency Across Every Production Run
From engineering-grade technical components to high-volume consumer parts, our advanced injection molding capabilities deliver the quality, consistency and efficiency your project demands.
Quality Assured
Rigorous quality control
Advanced Equipment
State-of-the-art machinery
Global Service
Serving 12+ countries
Fast Turnaround
Efficient production cycles
Custom Molding Solutions for Complex Challenges
With over 20 years of experience, our team delivers precision solutions that address the most demanding requirements in plastic injection molding, helping you overcome quality, material, and compliance challenges.
Common Challenges Our Clients Face
Quality Inconsistency
Many manufacturers struggle with part-to-part variations, dimensional instability, and surface defects that lead to high rejection rates and production delays.
Material Challenges
Finding the right material for specific applications that balances performance, cost, and processability can be complex, especially for engineering applications.
Compliance Issues
Meeting international standards and regulatory requirements can be challenging, particularly when documentation and material certifications are incomplete.
Our Comprehensive Solutions
Scientific Molding Process
Our data-driven approach to injection molding eliminates variability and ensures consistent, high-quality parts meeting your exact specifications.
- Advanced process monitoring systems
- Statistical process control (SPC)
- Multi-point quality verification
Advanced Material Solutions
From standard resins to high-performance engineering thermoplastics, we have the expertise to select and optimize materials for your specific application needs.
- Engineering-grade materials expertise
- Material selection guidance
- Specialized processing techniques
Global Standards Adherence
We follow international quality standards and compliance protocols, ensuring your products meet global regulatory requirements across different markets.
- Following ISO 9001:2015 quality principles
- Material certification documentation
- RoHS, REACH, FDA compliance support
Ready to solve your manufacturing challenges?
Connect with our engineering team to discuss your specific requirements and discover how our solutions can elevate your production quality.
Comprehensive Plastic Injection Molding Capabilities
With over 20 years of experience, TENGJIN MFG delivers precision injection molding services that meet the most demanding requirements across industries.
Equipment Capabilities
Machine Tonnage Range
Our facility houses injection molding machines ranging from 50 to 1000 tons, enabling us to produce components from micro-precision parts to large industrial housings.
Production Capacity
With 24/7 operation capability and 30+ injection molding machines, we can handle monthly production volumes from 1,000 to 1,000,000+ units to meet your scaling needs.
Advanced Processes
We specialize in advanced molding techniques including multi-shot molding, overmolding, insert molding, gas-assisted molding, and thin-wall molding for complex applications.
Materials Expertise
Standard Plastics
- ABS
- Polypropylene (PP)
- Polyethylene (PE)
- Polystyrene (PS)
- PVC
Engineering Plastics
- Nylon (PA6, PA66)
- Polycarbonate (PC)
- Acetal (POM)
- Modified PPO
- PBT
High-Performance
- PEEK
- PPS
- PEI (Ultem)
- PSU
- LCP
Specialty Materials
- Medical-grade plastics
- Food-safe materials
- Flame-retardant grades
- Glass/carbon fiber reinforced
- Bio-based plastics
Certifications & Compliance
Management Systems
Our manufacturing processes follow international quality management standards, ensuring consistent quality, environmental responsibility, and automotive industry compliance.
Regulatory Compliance
We maintain strict adherence to global regulatory standards, ensuring your products meet all necessary compliance requirements for international markets.
Quality Control System
Incoming Quality Control
Rigorous inspection of all raw materials and components before they enter our production process.
In-Process Quality Control
Continuous monitoring during production to catch and correct issues before they affect final products.
Final Quality Control
Comprehensive inspection of finished products against all specifications and quality standards.
Outgoing Quality Control
Final verification before shipping to ensure only perfect products reach our customers.
Production Environment
Clean Manufacturing Facility
Our 10,000+ square meter facility maintains controlled conditions for optimal production quality.
State-of-the-Art Equipment
Modern injection molding machines with advanced process controls for consistent production.
Testing Laboratory
Comprehensive testing facilities for material analysis, dimensional verification, and performance validation.
Our Streamlined Production Process
We've refined our injection molding workflow to ensure efficiency, quality, and transparency at every stage.
Project
Evaluation
Pre-
Production
Setup &
Optimization
First Article
Inspection
Mass
Production
Quality
Assurance
Packaging &
Logistics
Project Evaluation
Material selection, process planning, production scheduling to ensure optimal results for your specific requirements.
Pre-Production
Material preparation, mold installation and setup to prepare for the production run.
Setup & Optimization
Scientific molding parameters, cycle time optimization to maximize efficiency and quality.
First Article Inspection
Dimensional analysis, appearance check, approval process to verify product meets specifications.
Mass Production
Statistical process control, in-line quality checks to maintain consistency throughout production.
Quality Assurance
Final inspection, functional testing, documentation to ensure all products meet our high standards.
Packaging & Logistics
Custom packaging solutions, global shipping to deliver your products safely and on time.
Why Our Process Works
- Transparent communication at every stage
- Rigorous quality control protocols
- Optimized for efficiency and cost-effectiveness
- Flexible to accommodate custom requirements
Ready to Start Your Project?
Our team is ready to evaluate your requirements and provide a detailed production plan.
Our Injection Molding Success Stories
Discover how our precision injection molding solutions have helped clients across industries overcome manufacturing challenges and achieve exceptional product quality.
European Premium Kitchenware Brand
Challenge
Food-grade PP components with strict color consistency and zero defect requirements for a premium European kitchenware brand. The client needed a supplier who could maintain perfect consistency across millions of parts.
Solution
Implemented an automated production cell with integrated vision inspection system and developed a specialized QC protocol for color matching. We also engineered a custom-designed multi-cavity mold optimized for food-grade materials.
Results
Currently producing 1.5M+ parts annually with a remarkable 99.97% acceptance rate. All components are delivered with comprehensive EU compliance documentation, and the client has expanded their product line with us by 35%.
International Industrial Equipment Manufacturer
Challenge
High-tolerance engineering components in glass-filled PA66 with complex geometry for an international industrial equipment manufacturer. The parts required exceptional dimensional stability and needed to withstand harsh operating conditions.
Solution
Developed custom processing parameters and material formulation specifically for glass-filled compounds, implemented specialized handling processes to prevent contamination, and established 100% dimensional inspection using precision measurement equipment.
Results
Consistently achieved ±0.03mm tolerance on critical dimensions across all production runs. There have been zero field failures in these critical applications, and the manufacturer has subsequently moved 80% of their injection molding requirements to our facility.
Silicone Medical Components
Developed high-precision liquid silicone rubber molding process for a leading medical device manufacturer requiring biocompatible components.
Smart Device Housing
Created custom thin-wall housings with complex internal features for a Silicon Valley IoT startup, enabling rapid market entry.
UV-Resistant Components
Engineered specialized UV-resistant plastic components for high-end outdoor equipment, exceeding 5-year weathering requirements.
"After testing multiple suppliers, TENGJIN has proven to be our most reliable molding partner. Their technical team understands our quality requirements, and their consistency has eliminated the supply chain issues we previously faced."
Procurement Director
German Consumer Products Company
Why Clients Choose Our Injection Molding Services
Quality Management System Aligned with ISO 9001:2015
Advanced Material Testing Lab
20+ Years of Injection Molding Expertise
100% Pre-Delivery Inspection
Average Product Acceptance Rate
Dimensional Accuracy Capability
Client Retention Rate
Countries Served
Ready to Discuss Your Injection Molding Project?
Our engineering team is ready to analyze your requirements and provide a detailed solution tailored to your specific injection molding needs.
Complete Your Manufacturing Journey
Explore our comprehensive manufacturing services to support your project from concept to completion.
Need a comprehensive manufacturing solution? Our team can help you navigate the entire process.
Contact Our ExpertsReady to Start Your Injection Molding Project?
Let our 20 years of injection molding expertise transform your product designs into precision components. We offer confidential consultations to discuss your specific requirements.
Confidential Molding Solutions
Your intellectual property is safe with us. All injection molding consultations are covered by our standard non-disclosure agreement to protect your innovative designs and specifications.
Free Injection Molding DFM Analysis
Submit your component design and receive a complimentary injection molding DFM analysis. Our engineers will identify potential molding issues and suggest improvements before production begins.