Detailed Introduction

This multi-cavity injection mold is customized for full set PFA capsule filter main cylinder, dual-port end caps and positioning sealing bases, fully optimized for PFA’s high melt viscosity, outstanding chemical resistance and high-purity biocompatibility to eliminate typical PFA molding defects including axial wall uneven shrinkage, weld lines and port thread dimensional deviation.

The split fixed-moving two-plate mold adopts symmetrical multi-row cavity layout to boost single-cycle output for all components shown in the picture: long cylindrical filter main housing, two types of dual-port end caps and fixed positioning sealing bases. Each cylindrical component cavity is an independent embedded insert for quick disassembly, replacement and deep residue-free cleaning. All molding surfaces receive multi-stage high-gloss polishing tailored to PFA high-temperature melting characteristics, removing micro burrs and internal fluid dead corners without secondary post-molding trimming.

Independent distributed cooling pipelines are laid out for every single cavity to precisely stabilize mold temperature during continuous high-temperature PFA injection molding, effectively restraining long cylinder axial bending, thin cap wall warpage and threaded port deformation. Built-in precision interlock slide locking blocks maintain stable clamping force under long-cycle high-temperature mass production, preventing flash on thin cylinder edges and micro threaded port structures, and extending mold service life under cyclic fluoropolymer molding.

Complete Precision Machining Workflow

1. 5-axis CNC rough milling for mold base outline and long cylindrical filter cavity rough forming
2. Vacuum stress relief heat treatment to stabilize steel hardness and reduce thermal deformation under long-run high-temperature PFA molding
3. Precision surface grinding to control mold plate flatness & parallelism within ±0.002mm
4. Sinker EDM & Wire Cut WEDM for ultra-fine threaded port, thin cap wall and stepped positioning ring contours
5. Multi-stage high-temperature resistant high-gloss polishing matched with PFA melt fluidity
6. Optional anti-corrosion surface coating compatible with high-purity medical & semiconductor PFA raw materials

All mold core, cavity and structural components complete full 3D coordinate measuring inspection to satisfy strict high-purity fluid filtration equipment drawing tolerance standards. Full customization is supported based on PFA capsule filter samples or engineering drawings: cavity quantity, mold steel grade, cooling circuit layout and polishing grade can be adjusted according to PFA purity grade, chemical fluid resistance requirements and daily production capacity. The symmetrical multi-cavity layout greatly improves molding efficiency while unifying sealing precision, wall thickness consistency and chemical inertness of complete PFA capsule filter assemblies.

Specification Table