Jerry Zou is a CKMOLD technical content contributor and project contact. His editorial scope covers injection mold manufacturing, plastic-part design for manufacturability, material selection, tooling cost, mold trials, production handoff and troubleshooting for international product and sourcing teams.
Editorial responsibility
Jerry’s articles are intended to help product engineers, procurement managers and hardware teams define the information needed before a molding or tooling decision. Technical ranges are presented as starting points and should be checked against the exact resin grade, part geometry, mold, machine and end-use requirements.
Topics covered
- Injection-molded part DFM and CAD release requirements
- Injection mold design, trials, validation and transfer
- Plastic material selection and processing constraints
- Tooling budgets, RFQ preparation and supplier evaluation
- Defect diagnosis and production handoff controls
Evidence and disclosure approach
Regulatory, safety and material-performance claims should be linked to primary sources where available. Hypothetical calculations and illustrative engineering scenarios are labeled as such. No unnamed customer result, reviewer credential or project performance claim should be treated as verified evidence.
Company information
For verified company details, certificate scope and project responsibilities, see About CKMOLD. To discuss a part, use the project review form; CAD files can be emailed directly to jerry@ckmold.com.
Articles by Jerry Zou
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How to Support FDA and EU Food-Contact Requirements for Injection Molded Parts
A practical food-contact manufacturing guide covering resin documentation, mold hygiene, process control, traceability, testing and supplier evidence.
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What Is a Runner in a Plastic Mold? Types, Sizing, Balance and Defects
Learn what a mold runner does, how cold and hot runners differ, and how runner design affects pressure, balance, scrap, cycle and quality.
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Why You Cannot Mold Steel Like Plastic: Key Differences in Manufacturing
Understand why steel and plastic require different manufacturing routes, including melting temperature, viscosity, tooling, shrinkage and production economics.
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How Does the Plastic Molding Process Work? A Practical Manufacturing Overview
Learn how plastic molding works from material selection and tool design through filling, cooling, ejection, inspection and production control.
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How Can Mold Flow Analysis Save Time and Money? A Risk-Based Business Case
Learn when mold flow analysis pays back by reducing tooling changes, trial iterations, material waste, machine risk and production defects.
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TPU Injection Molding Process: Drying, Temperature, Tooling and Quality Control
A practical TPU injection molding guide covering hardness, drying, melt temperature, mold design, gate choice, ejection, appearance and validation.
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Bubbles in Injection Molded Parts: Causes, Diagnosis and Corrective Actions
Diagnose bubbles, voids and gas marks in injection molded parts by separating moisture, trapped air, shrinkage voids, degradation and process causes.
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Each Injection Molding Cycle Explained: Clamp, Fill, Pack, Cool and Eject
Follow every stage of an injection molding cycle, including clamping, plasticizing, filling, packing, cooling, mold opening and ejection.
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How Are Plastic Injection Molding Pressures Classified and Controlled?
Learn the difference between injection, holding, back, cavity and clamp pressure, and how each pressure affects injection molding quality.
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Mold Flow Validation: Correlating Simulation With T1 Results
Validate mold flow simulation against T1 short shots, pressure, cavity balance, weld lines, temperatures and warpage, then update assumptions and tooling actions.
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How to Read a Mold Flow Analysis Report
Read a mold flow analysis report by checking inputs, mesh, fill, pressure, weld lines, air traps, packing, cooling and warpage before accepting conclusions.
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Best Plastics for High-Heat Automotive and Industrial Parts: Selection Guide
Learn how to select high-heat injection molding plastics for automotive and industrial parts using temperature, load, chemical, dimensional and processing requirements.