Detailed Introduction

This multi-cavity injection mold is customized for full mixed PFA molded parts including capsule filter housings, transparent lab sample racks, manual valve guns, multi-port fluid control valves, threaded connectors and sealing rings, fully optimized for PFA’s high melt viscosity, outstanding chemical inertness and ultra-high purity to eliminate PFA typical molding defects such as uneven wall shrinkage, weld lines and transparent part haze.

The split fixed-moving two-plate mold adopts symmetrical multi-row modular cavity layout to realize mass production of two major categories of fluoropolymer components displayed in the image:

1. Filtration fluid parts: cylindrical filter main housing, dual-port end caps, square fluid control valves, multi-size threaded connectors and sealing rings;
2. Laboratory consumable parts: transparent tooth-shaped sample storage rack, manual trigger valve handles and micro connecting fittings.

Each complex multi-feature component cavity is an independent embedded insert for quick disassembly, replacement and deep residue-free cleaning. All molding surfaces adopt multi-stage high-gloss polishing matched with PFA high-temperature melting characteristics, removing micro burrs, internal fluid dead corners and surface fogging 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 transparent rack wall warpage and threaded port dimensional deviation. Built-in precision interlock slide locking blocks maintain stable clamping force under long-cycle high-temperature mass production, preventing flash on tiny thread, thin sealing edge and micro connector 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 mixed complex multi-feature 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 transparent rack wall and multi-way valve 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 and lab-grade PFA raw materials

All mold core, cavity and structural components complete full 3D coordinate measuring inspection to satisfy strict high-purity fluid filtration and laboratory equipment drawing tolerance standards. Full customization is supported based on mixed PFA molded part 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 flexibility while unifying wall thickness consistency, sealing precision and optical transparency of cross-series PFA integrated molded assemblies.

Specification Table