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This production tooling specification details the engineering framework for a 1-cavity PVC-U pipe joint injection mold.The tool layout integrates a mechanical collapsible core system to handle internal threads or 360-degree undercut geometries without slow hydraulic unscrewing mechanisms.Engineered with corrosion-resistant S136H pre-hardened stainless steel and full HASCO standard compliance,this mold provides stable processing for corrosive vinyl resins and ensures high-precision joint sealing interfaces.
Parameter | Specification |
Product Name | Pipe Joint (Pipe Fitting) |
Plastic Material | PVC-U (Unplasticized Polyvinyl Chloride) |
Cavity Count | 1 Cavity |
Core & Cavity Steel | S136H Pre-Hardened Stainless Steel (Anti-Corrosive) |
Component Standard | HASCO Standard Components |
Mold Mechanism | Mechanical Collapsible Core Sub-Assembly |
Corrosion-Resistant Tooling Expertise: Specialized in selecting and machining high-chromium steels (like S136H) to fully withstand the corrosive HCl gas generated during PVC-U injection molding.
Advanced Collapsible Core Engineering: Proven capability in designing segmented mechanical collapsible cores, eliminating complex hydraulic unscrewing systems while drastically reducing production cycle times.
Strict HASCO Standardization: 100% compliance with HASCO component standards, ensuring tight alignment tolerances for moving sleeves and seamless global spare parts sourcing.
Precision Defect Control: Mold layouts are optimized with custom gas venting channels to eliminate localized burns, air entrapment, and dimensional variations on critical joint sealing faces.
Q:What is the benefit of a collapsible core over an unscrewing system?
A:The collapsible core releases internal undercuts instantly through a mechanical radial collapse during the mold stroke.It lowers cycle times,reduces mold maintenance,and eliminates oil contamination risks from hydraulic cylinders.
Q:Why use S136H steel instead of standard tool steel for PVC-U?
A:PVC-U releases corrosive acid gas during injection.Standard steels like P20 or H13 rust and pit quickly under these conditions.S136H stainless steel inherently resists acid corrosion,preserving tool dimensions and surface finishes.
Q:How do you ensure uniform wall thickness with a segmented core?
A:During mold clamping,a rigid center tapered mandril locks the outer collapsing segments firmly into their precise positions.Combined with HASCO alignment components,this eliminates segment line flash and dimensional drifting.