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Localized wear, defects, or minor structural adjustments often occur during prolonged use or design modifications of injection molds. To restore mold precision, meet new process requirements, extend service life, and reduce maintenance costs, the "welding" process (typically gas welding or brazing) is commonly employed for localized mold repairs.

An injection mold trial is a critical phase in transforming mold design outcomes into qualified products. It not only verifies the mold's machining accuracy and the rationality of systems such as venting and cooling but also aims to rapidly identify optimal process conditions through parameter optimization. This ensures single-shot molding success, shortens trial cycles, and reduces overall costs.

To assess the quality of an injection mold, focus on four stages—design, manufacturing, trial molding, and mass production—combining quantitative testing and qualitative evaluation to ensure stable and efficient performance throughout its lifecycle.

Injection molding can theoretically produce thick-walled products, but for quality and efficiency considerations, the general design recommendation is to maintain an overall wall thickness of approximately 1-4 mm. If localized thicker designs are necessary, they should typically be limited to 6-8 mm. Exceeding this range requires specialized process design and validation.

The injection mold date stamp is an information device on the mold used to mark production year and month. Imprinting date codes on plastic parts facilitates production batch tracing and quality management. A well-designed date stamp enables fast, accurate, and stable date marking, providing reliable support for quality control and after-sales services.

In the injection molding process, ejector pins, as the core components of the ejection mechanism, are responsible for uniformly ejecting the molded product from the mold. A well-designed ejector pin layout not only ensures scratch- and deformation-free products but also reduces mold wear and extends service life.

In injection mold cooling systems, the design of seal grooves is critical to ensuring coolant channel sealing and cooling efficiency. Poorly designed seal grooves can lead to coolant leakage, reduced cooling performance, and even compromise mold lifespan and product quality.

Gas-Assisted Injection Molding (GAIM) is an advanced plastic processing technology that optimizes product structure, reduces material consumption, and improves molding quality by injecting high-pressure gas.

Injection molds are large in volume and mostly made of high-precision steel structures. During ocean transportation, they are prone to moisture, collisions, and vibrations. Inadequate packaging can lead to rust, deformation, or even mold damage.

The sprue not only distributes molten plastic evenly to runners but also directly influences melt temperature, pressure distribution, and mold-filling effectiveness.