Detailed Introduction

This medical multi-cavity injection mold is professionally developed for full-set minimally invasive biopsy instrument plastic consumables, fully optimized for medical certified POM+PA alloy to meet operating room cleanroom biocompatibility standards, effectively eliminating molding residue and thin-wall structural defects.

The split fixed-moving two-plate mold adopts symmetrical multi-row cavity layout to improve single-cycle production output for all components shown in the image: biopsy gun main housing, split rear casing, scale measuring forceps, threaded drive sleeves, elastic spring housings, positioning limit caps, miniature locking pins and transmission connecting blocks. Each functional component cavity is an independent embedded insert for quick disassembly, replacement and deep residue cleaning. All molding surfaces are treated with uniform medical matte texture etching to hide micro flow lines and surface gloss unevenness generated during POM+PA injection, removing secondary surface finishing after molding.

Independent distributed cooling pipelines are laid out for every cavity to stabilize mold temperature during continuous POM+PA injection molding, effectively restraining differential shrinkage, long slender rod warpage and thin-wall casing deformation. Built-in precision slide locking blocks maintain stable clamping force under long-term cleanroom mass production, preventing flash on tiny thread, buckle and micro pin structures, and extending mold service life under cyclic medical-grade plastic processing.

Complete Precision Machining Workflow

1. 5-axis CNC rough milling for mold base outline and complex multi-feature cavity rough forming
2. Vacuum stress relief heat treatment to stabilize steel hardness and reduce thermal deformation under long-run medical POM+PA molding
3. Precision surface grinding to control mold plate flatness & parallelism within ±0.002mm
4. Sinker EDM & Wire Cut WEDM for ultra-fine thread, slender transmission rod and micro lock pin contours
5. Multi-stage medical uniform texture etching, matched with POM+PA melt fluidity
6. Optional non-toxic anti-corrosion surface coating compatible with medical POM+PA raw materials

All mold core, cavity and structural components complete full 3D coordinate measurement inspection to satisfy strict surgical biopsy medical device drawing tolerance standards. Full customization is supported based on biopsy instrument samples or engineering drawings: cavity quantity, mold steel grade, cooling circuit layout and texture depth can be adjusted according to POM+PA medical certification grade, operating room hygiene standards and daily production capacity. The symmetrical multi-cavity layout greatly improves molding efficiency while unifying dimensional accuracy, assembly fit tolerance and surface consistency of minimally invasive biopsy disposable consumables.

Specification Table