Detailed Introduction

This high-efficiency hot runner mold set is divided into fixed mold half and moving mold half.

The left fixed mold plate integrates 32 independent detachable cavity inserts arranged in an orderly 4-row × 8-column matrix. Each group of four cavities forms a modular unit, allowing single worn inserts to be replaced separately instead of overhauling the whole mold, which greatly reduces maintenance downtime and cost. Dense conformal cooling channels are distributed around every cavity to realize uniform temperature control, effectively restraining shrinkage, sink marks and warpage of tiny thin-wall plastic products. Multiple large-diameter guide pins around the mold frame ensure ultra-high repeatability during mold closing, avoiding flash and dimensional offset under high injection pressure.

The right moving mold plate is fitted with a complete hot runner manifold system with red valve gate actuators installed on the top. The internal symmetrical runner network evenly distributes molten plastic to each cavity gate directly without cold runner material, cutting raw material consumption and shortening molding cycle significantly. The hot runner system supports multi-zone independent temperature control to prevent plastic degradation and inconsistent melt viscosity across all cavities. Built-in side layered cooling passages stabilize mold temperature during long continuous production cycles.

The full ultra-precision manufacturing workflow complies with high-volume precision molding standards: tiny intricate cavity contours are processed via micro sinker EDM and wire EDM to guarantee micron-level dimensional tolerance; mold steel undergoes vacuum quenching & tempering heat treatment to enhance hardness and wear resistance against glass-filled PBT, PA66 and LCP flame-retardant engineering plastics; multi-stage nano mirror polishing removes micro burrs inside cavities for flawless demolding. Optional PVD hard coating can be applied to cavity inserts and hot runner nozzles to extend mold service life.

All mold inserts, hot runner assemblies and mold base pass full CMM coordinate measurement and thermal cycle testing before assembly to strictly control cavity flatness, gate concentricity and mold closing clearance. We fully support custom development based on customer 2D/3D drawings or physical samples. Cavity quantity, hot runner valve gate layout, cooling layout and surface treatment can be adjusted according to daily production output, plastic material and service life requirements, meeting large-batch precision production demands of miniature multi-cavity plastic parts.

Specification Table