Detailed Introduction

This liquid silicone multi-cavity injection mold is customized for integrated transparent nebulizer trigger valve housings, fully optimized for LSR’s high transparency, soft skin-friendly texture and medical biocompatibility to resolve typical LSR molding defects such as multi-thick-thin wall uneven shrinkage, curved handle weld lines and transparent surface haze.

The split fixed-moving two-plate mold adopts symmetrical multi-row single-piece cavity layout to produce the integrated trigger valve housing shown in the image, which integrates cylindrical main body, side branch flow nozzle, threaded connecting cap and integrated hanging trigger handle as one molded component. Each irregular multi-feature valve cavity is an independent embedded insert for quick disassembly, size switching and residue-free deep cleaning. All molding surfaces undergo multi-stage high-gloss polishing matched with LSR high-temperature melt viscosity, eliminating micro burrs and internal fluid dead corners without secondary post-molding trimming.

Independent distributed cooling pipelines are laid out around the full contour of each cavity to precisely stabilize mold temperature during continuous high-temperature LSR vulcanization molding, effectively restraining uneven wall shrinkage, curved trigger handle deformation and threaded port dimensional deviation. Built-in precision interlock slide locking blocks maintain stable clamping force under long-cycle cleanroom mass production, preventing micro flash on thin-wall edges and threaded sealing sections to avoid scratching pipeline accessories, and extending mold service life under cyclic liquid silicone high-temperature processing.

Complete Precision Machining Workflow

1. 5-axis CNC CNC rough milling for mold base outline and complex integrated trigger valve cavity rough forming
2. Vacuum stress relief heat treatment to stabilize steel hardness and reduce thermal deformation under continuous high-temp LSR curing
3. Precision surface grinding to control mold plate flatness & parallelism within ±0.002mm
4. Sinker EDM & Wire Cut WEDM for ultra-fine threaded port, curved trigger handle and side branch nozzle contour features
5. Multi-stage high-temperature resistant high-gloss polishing optimized for transparent medical LSR
6. Optional particle-free anti-corrosion surface coating compatible with medical biocompatible LSR raw materials

All mold core, cavity and structural components complete full 3D coordinate measuring inspection to satisfy strict wearable respiratory therapy medical device drawing tolerance standards. Full customization is supported based on LSR trigger valve housing samples or engineering drawings: cavity quantity, mold steel grade, cooling circuit layout and polishing grade can be adjusted according to medical LSR purity grade, biosafety cleanroom standards and daily production capacity. The symmetrical multi-cavity layout greatly improves molding efficiency while unifying fluid channel smoothness, optical transparency and trigger handle softness of integrated LSR nebulizer trigger valve assemblies.

Specification Table