Shenzhen Shenchuang Hi-Tech Electronics Co.,Ltd

Shenzhen Shenchuang Hi-Tech Electronics Co.,Ltd

The Method Of Injection Molding Process For Mobile Phone Case

With the rapid development of communication technology, mobile phones are widely used. Mobile phone technology is moving in two directions: First, functional diversification; Second, the appearance of fine light. Therefore, in the mobile phone development process mobile Phone Case highlights its particularly important position. A set of mobile Phone Case covers the design of the structure, mold development, injection molding, spray printing and other processes, each link will affect the final appearance.

Structural design

The Phone Case is usually made of four pieces: face shell (front), face support (upper), back (front), back shell (lower) and some small pieces, such as battery cover, button, , Anti-scratch and other components. These components need to be fully considered in the structural design of interoperability, as well as with the circuit board and battery components such as assembly. In the structural design need to consider a lot of related issues, such as material selection, internal structure, surface treatment, processing means, packaging and decoration, specifically the following:

A. To evaluate whether the design is reasonable and reliable, including the manufacturing method, the mold of the mold direction, the mold slope, core pulling force, structural strength, circuit installation (and electronic engineering staff) is reasonable.

B. According to the shape requirements to determine whether the manufacturing process can be achieved, including mold manufacturing, product assembly, shell coating, silk screen, material selection, to be purchased parts supply.

C. To determine whether the product function can be achieved, the user is the best use.

D. Perform a specific structural design to determine the manufacturing process for each part. Pay attention to the structural strength of plastic parts, installation positioning, fastening methods, product variants, component installation and positioning, safety requirements, to determine the best assembly route.

E. Structural design to minimize the difficulty of mold design and manufacturing, improve the efficiency of injection molding, reduce mold costs and production costs.

F. To determine the entire product production process, testing means to ensure product reliability.

Mold design

Mold design must take full account of the structure of the product, assembly, but also need to consider the production of the product stripping and water distribution, gate distribution, the following brief introduction of product ribs and hooks, nuts and other locations of the design point of attention.

Injection molding process

Mobile Phone Case is usually PC (polycarbonate) or PC + ABS material molding, because the PC's mobility is relatively poor, so the process is usually used high mold temperature, high temperature filling; the gate is usually used for the gate, filling When you need to use grading injection, find a good location and the VP (injection - hold pressure) to switch the location, for solving the gas mark and the injection of flash and other exceptions will be a great help.

The following is the key points of the molding conditions of the mobile phone products, and the setting points of the molding parameters such as the melt temperature, the mold temperature, the injection speed and the back pressure are introduced.

Secondary processing

 After the processing of mobile Phone Case are usually: spray, color spray, printing, sandwich printing, electroplating, vacuum evaporation, hot pressing nut, annealing, ultrasonic welding.

The post-processing method can improve the appearance of plastic by spraying and electroplating, and improve the abrasion resistance of plastic surface. The post-treatment method such as hot-pressing ultrasonic welding can increase the number of inserts to facilitate assembly. The annealing process can eliminate the internal stress, Improve product performance.

Mobile Phone Case from the design, mold, commissioning, production, post-processing of the entire process are interlocking, and only the following factors: reasonable structure and design, accurate mold, reasonable process debugging, stable production and superb Of the post-processing to produce a set of exquisite durable Phone Case.

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