1*2 Cavity PP Material Large Sprue 2083 HRC46-48 Steel VDI 24 # Mold Finish Plastic Components Custom Mold

This custom plastic component injection mold is professionally tailored for mass production of general PP plastic structural parts, adopting mature 1×2 cavity layout, two finished plastic components per single molding shot to balance production efficiency and mold cost. Equipped with large sprue feeding structure, the injection mold solves PP’s high shrinkage & fast cooling defects effectively, ensuring stable melt feeding and sufficient packing pressure for consistent part dimension.

Core and cavity of the injection mold are fabricated from premium 2083 pre-hardened mold steel, heat-treated to hardness HRC46–48, featuring excellent polish performance, anti-rust property and uniform texture forming capacity. The mold inner cavity is finished with standard VDI24 mold grain, delivering consistent fine matte surface on PP finished parts to cover slight flow lines and upgrade product appearance. All machining processes follow strict custom requirements for different plastic component shapes, widely applied for daily-use, electronic housing and household PP accessories.

Two identical cavities with symmetric runner layout realize synchronized PP melt filling, uniform weight and dimensional accuracy for molded plastic components. This layout fits medium-batch production perfectly, controlling mold investment while lifting hourly output vs single-cavity mold.

PP features fast cooling speed and prominent shrinkage rate; large sprue reserves redundant melt for packing, effectively eliminating sink marks, voids and incomplete filling on thick-wall PP components, greatly improving finished product pass rate.

2083 pre-hardened steel owns inherent anti-corrosion performance, avoiding cavity rust during long-term PP molding with high-moisture raw material. HRC46–48 hardness balances machining feasibility and wear resistance, stable VDI24 grain retention after millions of molding cycles.

VDI24 fine grain forms uniform matte surface on PP plastic components, hides minor molding flow marks, optimizes hand feeling and avoids bright scratch defects on finished parts without secondary surface processing.

We adjust cavity outline, wall thickness, gate position and ejection structure strictly per customer’s 2D drawings, 3D files or physical samples to meet personalized plastic component development demands.

Custom PP plastic components manufactured from this injection mold are widely used for household appliance internal fittings, electronic insulation parts, daily plastic accessories, small automotive interior plastic parts and general mechanical fixing brackets.

Q1: What is the advantage of large sprue for PP injection molding? A1: Large sprue stores extra molten PP material, supplies continuous packing pressure to compensate PP high shrinkage, effectively removes sink dent and shrinkage hole defects on thick plastic components.

Q2: Why select 2083 HRC46-48 steel for PP component mold? A2: 2083 is stainless pre-hardened steel with natural rust-proof ability, suitable for PP raw material with high moisture content; HRC46–48 ensures long-term VDI24 texture integrity and stable mold precision.

Q3: What surface effect does VDI24 bring on PP plastic parts? A3: VDI24 produces even fine matte texture, covers slight flow lines during PP molding, improves product appearance grade and anti-slip performance of finished plastic components.

Q4: Can we modify cavity number from 1×2 to 1×1 or 1×4? A4: Yes, we revise cavity layout flexibly based on your monthly order quantity: single cavity for prototype trial, multi-cavity design for high-volume mass production.

Q5: Does this mold support modified PP with talc filler? A5: Standard version works for pure PP; we can upgrade cavity hardness and surface treatment if you adopt talc-filled or mineral-filled PP materials.