Answers to common questions about our injection mold manufacturing services
Common materials include ABS, PP, PC, PA (nylon), POM (acetal), HDPE, LDPE, and specialized engineering plastics. The choice depends on application requirements for strength, heat resistance, chemical compatibility, and cost.
Sink marks are typically caused by uneven cooling or insufficient packing pressure. Warpage often results from uneven shrinkage due to material orientation, cooling rates, or mold design issues.
Flash (excess material) is usually fixed by adjusting clamping pressure or mold alignment. Short shots (incomplete filling) can be resolved by increasing injection pressure, temperature, or flow rate.
Standard mold manufacturing lead times range from 4-6 weeks for simple molds to 8-12 weeks for complex molds. Rush options may be available for urgent projects.
Gate size depends on material type, part geometry, and processing conditions. Generally, gate size should be 50-80% of the thickness of the thickest wall section.
Key considerations include wall thickness uniformity, draft angles, corner radii, gate location, and ejection system design to ensure moldability and part quality.
Clamping force (in tons) = projected area of part (in square inches) × material factor (typically 2-8 tons per square inch) × safety factor (1.2-1.5).
Hot runner systems reduce material waste, improve part quality, enable faster cycle times, and allow for more complex part geometries.
Optimize cooling by placing cooling channels close to the mold cavity, using uniform channel spacing, and ensuring adequate flow rate and temperature control.
Quality control measures include dimensional inspection, material testing, mold flow analysis, and trial runs to verify mold performance and part quality.