OEM Prototype Overmolding Injection Mould Polypropylene Plastic
Parts
ALLWIN MOULD is a leading manufacturer of custom plastic injection
moulds, specializing in high-performance overmolding (two-shot injection moulding) solutions for power tool components. Our overmolded handle moulds
deliver exceptional ergonomics, durability, and production
efficiency for global power tool OEMs.
Product Overview
This is a high-precision two-shot overmolded power tool handle, engineered for ergonomic, shock-absorbent grip on chainsaws,
trimmers, and other garden/construction power tools. The design
features a rigid plastic structural core (for strength and
mounting) overmolded with a soft, non-slip TPE/TPR rubber layer,
combining structural integrity with superior user comfort and
safety.
Key Technical Specifications & Mould Features
✅ Advanced Two-Shot Overmolding Technology
- Dual Material Integration: Rigid engineering plastic (PP/PA66+GF) core + soft TPE/TPR
overmold, chemically bonded for zero delamination
- Precision Mould Design: Rotating platen or shuttle table two-shot mould system, ensuring
perfect alignment and consistent overmold thickness
- Ergonomic Geometry: Optimized handle contour for reduced hand fatigue, with
integrated mounting holes and structural ribs for tool assembly
✅ Automotive-Grade Mould Construction
- Mould Base Standards: Compliant with LKM, HASCO, DME international standards
- Premium Tool Steels: Cavity/core inserts manufactured with NAK80, S136(H), or H13
hardened steel, delivering 500,000–1,000,000+ shot lifespan
- Hot Runner System: Dual independent hot runner systems for each material, ensuring
uniform filling and zero waste
- Advanced Cooling: Conformal water cooling channels + beryllium bronze inserts,
minimizing cycle time and preventing warpage in complex geometries
✅ Material & Performance Advantages
- Core Material: High-strength PP, PA66+GF, or ABS, for structural rigidity and
impact resistance
- Overmold Material: Soft TPE/TPR, offering excellent non-slip grip, vibration
damping, and temperature resistance (-40°C to 80°C)
- Compliance: Fully RoHS, REACH, and UL compliant, meeting global power tool
safety standards
✅ Precision Quality Control
- Tight tolerance control (±0.01mm) for perfect tool assembly fit
- Rigorous adhesion testing to ensure zero delamination under extreme
operating conditions
- ISO 9001/14001 certified, with strict QC aligned with
European/American power tool industry standards
Comprehensive One-Stop Service
We provide end-to-end overmolding solutions to streamline your
production:
- DFM Analysis: Proactive design optimization for overmold manufacturability,
material bonding, and cost reduction
- Mould Design & Manufacturing: Expert two-shot mould engineering, precision CNC/EDM machining,
and full assembly
- Mould Trial & Validation: Comprehensive testing for material adhesion, dimensional
accuracy, and production efficiency
- Value-Added Services: Injection molding, secondary operations, and assembly support
- Lifelong After-Sales Support: Technical guidance, spare parts supply, and maintenance services
Core Competitive Advantages
- Specialized Overmolding Expertise: Decades of experience in two-shot injection moulding for power
tool components
- Full In-House Manufacturing: Complete set of mould making and two-shot injection machines for
end-to-end quality control
- Short Lead Times & Cost-Effectiveness: Streamlined production workflows for fast delivery at competitive
factory-direct pricing
- Global OEM Experience: Proven track record serving leading power tool brands worldwide,
adhering to strict industry standards
Application Scope
Our overmolding solutions are widely used for:
- Power tool handles (chainsaws, trimmers, drills, saws)
- Garden tool grips and ergonomic components
- Power tool housing and vibration-damping parts
- Handheld industrial tool ergonomic upgrades
