U-PVC Elbow 87.5° Pipe Fitting Mold: Technical Overview The U-PVC elbow 87.5° pipe fitting mold is a precision-engineered tool designed for manufacturing high-quality 87.5-degree elbow fittings used in plumbing, irrigation, and industrial piping systems. These fittings are critical for redirecting fluid flow in pipelines while maintaining optimal pressure and minimizing turbulence. The mold ensures consistent production of durable, leak-proof elbows that meet industry standards for dimensional accuracy, surface finish, and mechanical performance. Design and Structure The mold is typically constructed from high-grade tool steel or hardened stainless steel to withstand the high temperatures and pressures involved in injection molding. It consists of multiple components, including: 1. Core and Cavity: The core forms the inner surface of the fitting, while the cavity shapes the outer surface. Both are precision-machined to achieve tight tolerances (typically within ±0.1mm). 2. Cooling System: Integrated cooling channels ensure uniform heat dissipation, reducing cycle times and preventing warping or defects in the final product. 3. Ejection Mechanism: Automated ejector pins or plates release the molded fitting without damaging its structure. 4. Ventilation System: Small vents allow trapped air and gases to escape during molding, preventing voids or surface imperfections. Material and Performance U-PVC (unplasticized polyvinyl chloride) is the primary material processed in this mold. Known for its rigidity, chemical resistance, and longevity, U-PVC is ideal for pressurized systems. The mold must accommodate the material’s high melt viscosity and shrinkage rate (≈0.5–1.2%) to ensure dimensional stability. Production Process 1. Injection Molding: Molten U-PVC is injected into the mold cavity under high pressure (800–1,500 bar). 2. Cooling Phase: The material solidifies uniformly, aided by the mold’s cooling system. 3. Ejection: The finished elbow is ejected, and the mold closes for the next cycle. Quality Assurance Each fitting undergoes checks for: - Dimensional accuracy (e.g., inner/outer diameter, angle deviation). - Surface smoothness (free of flow marks or burrs). - Pressure resistance (tested per ISO 4422 or ASTM D1785 standards). Applications The 87.5° elbow is commonly used in: - Potable water systems (due to U-PVC’s non-toxicity). - Drainage and sewage networks (resistant to corrosion and abrasion). - Chemical processing pipelines (handles acidic/alkaline fluids). Advantages of the Mold - High Durability: Robust construction ensures a lifespan of 500,000+ cycles. - Efficiency: Optimized cooling and ejection reduce cycle times. - Precision: CNC machining guarantees consistent product quality. Conclusion The U-PVC elbow 87.5° pipe fitting mold is a critical tool for producing reliable, standardized fittings essential for modern piping infrastructure. Its advanced design, material compatibility, and rigorous quality control make it indispensable for manufacturers aiming to deliver high-performance plumbing solutions.