The production process of resin zipper
Update time：2026.10.21 Views：1749
The production process of resin zipper
The raw material preparation stage is the foundation of production. The main raw material for the resin teeth described here is polyoxymethylene (POM). At the same time, high-quality webbing and pulls need to be prepared. The webbing is usually made of polyester fiber and undergoes strict tensile strength testing.
Mold design and manufacturing are core technical processes. Engineers use CAD software to design the precise shape of zipper teeth. Dimensional tolerances should be specified for the tooth design and verified for the selected resin grade, mold and processing conditions. The mold is made of special steel processed by CNC machine tools, and the surface is precision polished to ensure that the formed zipper teeth are smooth and free of burrs.
Injection molding is a crucial manufacturing step. The resin particles are fed into the injection molding machine and melted using the material supplier's recommended conditions for the selected resin grade and part design, then injected into the mold under high pressure. After cooling and shaping, rows of resin teeth are formed. During this process, the control of temperature, pressure, and time is crucial and directly affects the quality of the product.
The assembly process perfectly combines various components. After the resin zipper chain has been formed, a complete slider is mounted as part of the selected finishing process. Inspection methods and acceptance criteria should be selected for the product and production stage. Finally, after lubrication treatment, the zipper slides more smoothly.
Quality inspection ensures product reliability. Including multiple tests such as tensile testing, abrasion resistance testing, and color fastness testing. Required operating cycles and service-temperature limits should be specified for the zipper's intended application and verified using appropriate test methods and conditions.
The raw material preparation stage is the foundation of production. The main raw material for the resin teeth described here is polyoxymethylene (POM). At the same time, high-quality webbing and pulls need to be prepared. The webbing is usually made of polyester fiber and undergoes strict tensile strength testing.
Mold design and manufacturing are core technical processes. Engineers use CAD software to design the precise shape of zipper teeth. Dimensional tolerances should be specified for the tooth design and verified for the selected resin grade, mold and processing conditions. The mold is made of special steel processed by CNC machine tools, and the surface is precision polished to ensure that the formed zipper teeth are smooth and free of burrs.
Injection molding is a crucial manufacturing step. The resin particles are fed into the injection molding machine and melted using the material supplier's recommended conditions for the selected resin grade and part design, then injected into the mold under high pressure. After cooling and shaping, rows of resin teeth are formed. During this process, the control of temperature, pressure, and time is crucial and directly affects the quality of the product.
The assembly process perfectly combines various components. After the resin zipper chain has been formed, a complete slider is mounted as part of the selected finishing process. Inspection methods and acceptance criteria should be selected for the product and production stage. Finally, after lubrication treatment, the zipper slides more smoothly.
Quality inspection ensures product reliability. Including multiple tests such as tensile testing, abrasion resistance testing, and color fastness testing. Required operating cycles and service-temperature limits should be specified for the zipper's intended application and verified using appropriate test methods and conditions.
From raw materials to finished products, the birth of a resin zipper embodies multiple technologies in materials science, mechanical engineering, and precision manufacturing. It is precisely these rigorous techniques that have created this seemingly simple yet indispensable practical invention in our daily lives.
