Detailed Introduction

This multi-cavity liquid silicone injection mold is customized for irregular multi-prong positioning buckle components of laboratory diagnostic testing equipment, fully optimized for LSR’s soft elasticity, high transparency and medical biocompatibility to solve typical LSR molding defects including thin rib shrinkage, local weld lines and transparent surface haze.

The split fixed-moving two-plate mold adopts symmetrical multi-row interchangeable cavity layout to produce two types of multi-groove positioning buckles shown in the image, each integrated with long locating pin, multi-side clamping ribs and outer mounting buckles. Every multi-rib thin-wall silicone component cavity is an independent embedded insert for quick disassembly, size switching and residue-free deep cleaning. All molding surfaces adopt multi-stage high-gloss polishing matched with LSR high-temperature vulcanization characteristics, removing micro burrs and sharp edges without secondary post-molding trimming.

Independent distributed cooling pipelines are arranged for every single cavity to precisely stabilize mold temperature during continuous LSR curing molding, effectively restraining thin rib bending, long positioning pin deformation and buckle flatness deviation. Built-in precision interlock slide locking blocks maintain stable clamping force under long-cycle Class 100 cleanroom mass production, preventing micro flash on thin rib edges and contact surfaces that may scratch precision diagnostic test chips or slides, and extending mold service life under cyclic liquid silicone molding.

Complete Precision Machining Workflow

1. 5-axis CNC rough milling for mold base outline and multi-rib irregular buckle cavity rough forming
2. Vacuum stress relief heat treatment to stabilize steel hardness and reduce thermal deformation under long-run LSR high-temp curing
3. Precision surface grinding to control mold plate flatness & parallelism within ±0.002mm
4. Sinker EDM & Wire Cut WEDM for ultra-fine long locating pin, thin rib and side buckle contour features
5. Multi-stage high-temperature resistant polishing optimized for transparent medical LSR
6. Optional anti-particle anti-corrosion surface coating compatible with high-purity diagnostic-grade LSR raw materials

All mold core, cavity and structural components complete full 3D coordinate measuring inspection to satisfy strict laboratory diagnostic equipment drawing tolerance standards. Full customization is supported based on LSR positioning buckle 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 requirements and daily production capacity. The symmetrical multi-cavity layout greatly improves molding efficiency while unifying rib flatness, silicone transparency and positioning dimensional interchangeability of all diagnostic instrument silicone positioning assemblies.

Specification Table