Detailed Introduction

This multi-cavity injection mold is customized for full range multi-size PFA quick fluid connectors, fully optimized for PFA’s high melt viscosity, superior chemical inertness and high transparency to eliminate typical PFA molding defects including obvious weld lines, thread shrinkage and transparent surface haze.

The split fixed-moving two-plate mold adopts symmetrical multi-row interchangeable cavity layout to produce all fittings shown in the picture: straight union, 90° elbow, T-type three-way quick connectors in multiple standard sizes. Each multi-angle complex pipeline fitting cavity is an independent embedded insert for fast disassembly, replacement and deep residue cleaning. All molding surfaces adopt multi-stage high-gloss polishing matched with PFA high-temperature melting characteristic, greatly reducing surface flow streaks and internal fluid dead corners, no secondary deburring or polishing needed after molding.

Independent distributed cooling pipelines are laid out for each cavity to precisely control mold temperature during continuous high-temperature PFA injection molding, effectively restraining thread section uneven shrinkage, curved elbow wall deformation and branch port dimensional deviation. Built-in precision interlock slide locking blocks maintain stable clamping force under long-cycle high-temperature mass production, avoiding flash on fine thread and thin-wall connecting ends, and extending mold service life under cyclic fluoropolymer processing.

Complete Precision Machining Workflow

1. 5-axis CNC rough milling for mold base outline and complex multi-angle pipeline cavity rough forming
2. Vacuum stress relief heat treatment to stabilize steel hardness and reduce thermal deformation under long-term 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 thread, curved elbow and three-way branch contour features
5. Multi-stage high-temperature resistant high-gloss polishing optimized for PFA melt fluidity
6. Optional anti-corrosion surface coating compatible with high-purity semiconductor & biopharma PFA raw materials

All mold core, cavity and structural components complete full 3D coordinate measuring inspection to satisfy strict ultra-clean fluid pipeline tolerance standards. Full customization is supported based on PFA quick connector samples or engineering drawings: cavity quantity, mold steel grade, cooling circuit layout and polishing grade can be adjusted according to PFA purity grade, corrosive fluid resistance requirements and daily production capacity. The modular multi-cavity layout greatly improves molding efficiency while unifying thread sealing accuracy, pipeline transparency and interchangeable dimensional consistency of all PFA quick fluid connectors.

Specification Table