Judging from the current market situation, plastic injection molding products account for about 30%-40% of the entire plastic product market, and its high-efficiency, high-quality molding methods are also favored by many companies! And the precision of the injection molded casing produced by injection molding is much higher than other molding methods, and the injection molded casing is one of the entire injection molding industry.
In daily life, the Enclosure of many items is made of different plastics through injection molding. Such as mobile phone shells, refrigerator shells, computer, and air conditioner shells, etc. are all produced by injection molding. Regardless of the product's craftsmanship and performance, the shell is always the first thing consumers come into contact with. If the quality of the shell does not meet the requirements, it will bring consumers a bad experience and leave a bad impression. affect product sales. Therefore, each manufacturer has very strict requirements for the quality of the casing. Then, what processes should be paid attention to when processing the casing by injection molding?
Material selection
According to the product Enclosure to be used, select the appropriate injection-molded plastic material to make the Enclosure, taking into account the functional requirements, appearance requirements, and durability of the product. Common injection molding plastic materials include polypropylene (PP), polyethylene (PE), polystyrene (PS), polycarbonate (PC), and the like.
Dimensional tolerances for injection molded enclosure
If the size of the drawing is too different from the actual product size, it will cause a relatively large gap, which will bring a bad visual experience to consumers and leave an impression of poor product quality.
Injection parameter control
Control the parameters in the injection molding process, such as melting temperature, injection pressure, injection speed, cooling time and pressure holding time, etc. Proper parameter control can ensure that the plastic material is fully melted, fills the mold cavity, and avoids product defects such as short flow, air bubbles, warpage, etc.
The surface finish of injection molded housing
The product shell must ensure smoothness to leave a comfortable impression on consumers, which has a considerable relationship with the design of the injection mold and the raw materials used.
The spray paint of the injection molding shell must be even
If the injection molded parts need to be sprayed on the shell or the like, it must be sprayed evenly, and the peculiar smell brought by it must be eliminated in time.
The strength of the injection molding shell must be durable
Products such as general electrical appliances need to be used for at least ten years or more, and there will inevitably be bumps and bumps. Therefore, the injection molding shell must have impact resistance, etc. As long as you pay attention to these problems, you can produce Qualified products.
Quality Control and Inspection
During the injection molding process, strict quality control and inspection are carried out to ensure that the shell products meet the requirements. Including testing the size, surface quality, strength, etc. of injection molded parts, and adjusting process parameters in time to optimize product quality.