PVC Expansion 90-Degree Elbow Injection Mold: Technical Overview A PVC expansion 90-degree elbow injection mold is a specialized tool designed for manufacturing PVC expansion joints used in piping systems. These elbows allow for thermal expansion and contraction in pipelines, reducing stress and preventing damage. The mold is engineered to produce precise, durable fittings with consistent quality, ensuring reliable performance in plumbing, HVAC, and industrial applications. Key Features of the Mold 1. Material & Durability The mold is typically made from high-grade steel (e.g., P20, H13, or stainless steel) to withstand high-pressure injection molding cycles. Hardened surfaces and corrosion-resistant coatings extend the mold’s lifespan, even when processing abrasive PVC compounds. 2. Precision Engineering The mold cavity and core are CNC-machined to tight tolerances (±0.02mm) to ensure dimensional accuracy. The 90-degree bend radius is optimized for smooth flow and stress distribution, while the expansion joint design accommodates movement without leakage. 3. Cooling System Efficient cooling channels are integrated to regulate mold temperature, reducing cycle times and preventing warping or sink marks in the final product. Uniform cooling is critical for maintaining part consistency. 4. Ejection Mechanism Automatic ejector pins or plates ensure smooth part release without deformation. The system is designed to handle the slightly flexible nature of PVC elbows while minimizing flash or sticking. 5. Multi-Cavity Options Depending on production needs, the mold can be single or multi-cavity to increase output. Balanced runner systems ensure even material distribution across all cavities. Injection Molding Process The PVC material (often with additives for UV/chemical resistance) is melted and injected into the mold under high pressure. The mold’s design ensures proper filling, packing, and cooling to produce defect-free elbows. Post-processing, such as deburring or threading, may be applied if required. Applications PVC expansion 90-degree elbows are widely used in: - Plumbing systems (compensating for pipe movement). - Industrial pipelines (handling thermal shifts in chemical or wastewater systems). - HVAC installations (reducing vibration stress). Advantages of the Mold - High repeatability for mass production. - Low maintenance with proper care. - Compatible with automated injection molding systems. In summary, this injection mold is a critical tool for producing reliable PVC expansion elbows, combining precision engineering with robust construction to meet industry demands.