Injection molding in Vietnam is widely applied in mold manufacturing and processing. The process involves various technical treatments, each with distinct operation methods, which ultimately affect the adhesion quality of the final product. 所以, in surface treatment, preparatory work is essential, especially to improve the bonding strength of coatings. 所以, how should mold processing and manufacturing be handled? Below are some primary treatment methods and approaches:
- De-oiling Treatment
In mold processing and manufacturing, de-oiling for plastic products is crucial and shares many similarities with de-oiling methods for metal products. Injection-molded products typically use organic solvents for cleaning, combined with an active alkaline water solution, to effectively remove wax and other organic residues from the plastic surface. Notably, these organic solvents do not dissolve or crack the plastic, have a low boiling point, evaporate easily, and are non-toxic, making them safe and reliable. - Surface Activation
Mold processing and manufacturing also need to focus on surface activation. This activation aims to enhance the surface performance of injection-molded products, roughening the plastic surface to improve adhesion. Common treatment methods include chemical oxidation, often involving various acidic solutions. In typical formulations, sulfuric acid concentrations can reach up to 96%, effectively enhancing the surface activity of plastics.
- High-Quality Coating Application
Achieving high-quality coatings is essential in mold processing and manufacturing. During the oxidation process, if degreasing treatment is required, the plastic can be soaked in a diluted acid solution. The processing method varies depending on the formulation, typically performed at 65°C, ensuring a thorough water rinse before drying. A key advantage of this approach is that it enables smooth injection molding regardless of the complexity of the plastic product’s shape.
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