Expansion Pipe Nail Construction Part Injection Mold: Precision Molding for Reliable Fastening

Expansion pipe nail injection molds are specialized precision tools for manufacturing plastic expansion pipe nails—core fastening components in construction, home renovation, and furniture installation. These molds address key pain points of expansion pipe nails: unstable expansion, weak load-bearing, and installation slippage—by optimizing mold structure, material compatibility, and injection parameters. Unlike general plastic molds, they prioritize the precision of expansion slots, nail-hole fit, and structural rigidity, ensuring each molded part meets construction standards (e.g., pull-out force ≥800N) for long-term use.

Core Precision Molding Craft

1. Material-Adapted Mold Design

Targeting construction-grade materials (PP for general use, PA66+20% glass fiber for heavy-load scenarios), molds use P20 or S136 steel (heat-treated to HRC 50–52) to resist abrasion from glass fiber. The mold cavity for expansion slots is processed with ±0.01mm tolerance, ensuring uniform expansion when nails are driven in—avoiding partial cracking or loose fastening.

2. Structural Optimization for Fastening Performance

• Nail-Hole Fit Precision: Molded pipe nails feature a nail-hole diameter tolerance of ±0.02mm, matching standard carbon steel nails (3–6mm diameter) to prevent slippage during installation. Locating pins in the mold ensure coaxiality between nail holes and expansion slots (deviation ≤0.008mm).

• Load-Bearing Reinforcement: Via MoldFlow simulation, the mold optimizes rib distribution at the pipe nail’s root (thickened to 3mm) and expansion sections (thinned to 1.2mm for flexibility), balancing rigidity and expansion efficiency.

1. Efficient Mass-Production Controls

Molds adopt 1-out-8 or 1-out-12 cavity layouts, with straight cooling circuits (diameter 8mm) to shorten cooling time to 20–25 seconds per cycle. Automated ejector pin systems (4 pins per cavity) ensure smooth demolding, avoiding deformation of expansion slots—maintaining 99.6% product yield.

Key Advantages of Molded Pipe Nails

• Strong Load-Bearing: Pull-out force ≥800N for PA66+GF parts (suitable for hanging 10–15kg objects like cabinets).

• Weather Resistance: PP pipe nails withstand -30℃ to 70℃, no brittle cracking in cold winters or softening in hot summers.

• Easy Installation: Precision expansion slots enable quick, uniform expansion—reducing installation time by 30%.

Application & Compliance

Our molds are compatible with standard expansion pipe nail sizes (6×30mm to 10×80mm), meeting ROHS and GB/T 1040 standards for construction plastics. They support stable production of 100,000+ parts monthly, ideal for construction material manufacturers and hardware suppliers.