1*4 PP Material Hot Runner 1.2767 HRC50-54 Steel Plastic Wall Box Plastic Injection Molding

This is a high-precision custom industrial 1*4 cavity plastic injection mold, professionally engineered for mass production of PP (Polypropylene) plastic wall box components. Built with premium 1.2767 hot work mold steel and heat-treated to a hardness of HRC 50-54, this mold delivers exceptional wear resistance, high rigidity, and long service life for continuous industrial production. Equipped with a reliable hot runner system, the mold ensures balanced melt distribution, consistent filling across all four cavities, and reduced material waste. Optimized specifically for the molding characteristics of PP materials, it effectively solves common issues such as shrinkage, warpage, and dimensional inconsistency in wall box products, making it an ideal tool for high-volume manufacturing of electrical plastic wall boxes and enclosures.

This plastic wall box mold adopts a high-efficiency 1*4 multi-cavity layout, which balances high production output with consistent molding quality. Unlike ordinary molds, this tooling is specifically optimized for PP materials, which are widely used in electrical applications for their chemical resistance and low cost. Since PP has high shrinkage and requires precise control over melt flow, we use a reliable hot runner system to maintain uniform temperature and pressure across all four cavities, eliminating cold slug issues and ensuring identical filling in each cavity.

The mold is constructed with high-grade 1.2767 mold steel, which undergoes strict heat treatment to achieve a hardness of HRC 50-54. This process greatly enhances the mold’s wear resistance and thermal stability, making it capable of withstanding long-term continuous production cycles without deformation or surface degradation. The mold’s structure is designed with reinforced wear parts and precise alignment guides to ensure long-term dimensional accuracy, even after millions of shots.

Equipped with scientifically arranged circulating cooling water channels, the mold realizes uniform and rapid cooling, which is critical for minimizing shrinkage and warpage in PP wall boxes. This shortens molding cycle time, improves production efficiency, and ensures consistent part dimensions across all four cavities. The overall mold structure is compact with precise fitting clearance, low failure rate, strong durability and convenient daily maintenance and repair.

PP (Polypropylene) is a widely used plastic material for electrical wall boxes and junction boxes due to its excellent electrical insulation, chemical resistance, and low cost. However, PP has a relatively high shrinkage rate and can be prone to warpage if not molded correctly. This professional PP injection mold solves these pain points perfectly through its high-quality mold steel configuration, optimized hot runner design, and advanced cooling system.

Compared with ordinary plastic molds, this industrial tooling has stronger wear resistance and pressure resistance. It stably outputs high-precision plastic wall box products with consistent dimensions, smooth surfaces, and excellent batch consistency. The 1*4 multi-cavity design greatly increases production efficiency while retaining strict quality standards, helping customers reduce unit costs and meet large-scale order requirements.

This custom PP injection mold is widely used for mass production of plastic wall boxes and related components, including electrical junction boxes, wiring enclosures, control panel housings, and other low-voltage electrical components. It is suitable for both indoor and outdoor applications requiring durable, insulating plastic parts. This mold is the best choice for high-volume manufacturing of electrical plastic wall boxes and enclosures.

All our custom injection molds are manufactured strictly according to international industrial mold standards. We conduct multiple inspections including steel hardness testing, precision dimensional checking, surface finish inspection and repeated mold trial testing. Every mold will complete sample confirmation before delivery to ensure stable molding performance, qualified product size and perfect surface effect. We provide professional full-cycle after-sales services, including mold maintenance guidance, remote technical support, mold repair and modification services, ensuring long-term stable operation of customer production lines.