Today, the style of consumer products is ever-changing, and it needs to be beautiful in appearance and exquisite in design, and it must also quickly meet market demand. Designers generally use different materials in different parts of the consumer product to meet the needs of specific environments, to achieve the goal of extending product life, increasing aesthetics and practicality. This practical design requirement will undoubtedly lead to complications in production technology. The two-material injection molding process is born in response to this trend.
The general two-material product can be manufactured by a single-color injection molding machine. Basically, one injection molding machine can be used. However, the post-processing process is quite time-consuming and complicated, directly affecting the quality of the product, and the total production cost is not economical.
In addition to the corresponding changes in the injection molding machine, the mold design process is the soul of the whole technology. The mold is rotated and displaced to achieve the effect of simultaneous injection of different materials. The mold design is roughly divided into two categories: the first type has two mold cavities, and the semi-molded module is transferred 180 degrees into the other mold cavity by the rotation mode, and the advantage is that the first and second processes can be simultaneously performed; One type is a single cavity, and the semi-finished product is rotated 180 degrees along with the mold. The design is relatively simple, but the production efficiency is correspondingly reduced. Since the mold or semi-finished product needs to be rotated, the mold design and the requirements of the injection molding machine are more precise. In addition, due to the high variability of double (multi) material injection molding, it is necessary to achieve smooth production and meet the expected ideals. All mold design must be considered in parallel with product design, and the specifications of the popular double material injection molding machine are not uniform, resulting in Molds are designed with more issues in mind; plus less versatility, moldmakers must pay more attention.
Double material products are generally made of hard plastics such as ABS and PC, and TPE soft plastics. They are suitable for making tableware, tool handles, case, telephone casing and buttons. This makes the production company must pay attention to three points in technology: the fusion of the two types of materials, the complexity of the product and the adjustment of the injection molding machine. For example, due to cost or application, there may be no good adhesion between the materials used, and double material injection usually requires more debugging work in this area.
China is gradually becoming the production base of global consumer products. In recent years, manufacturers of plastic products in South China have undertaken many orders requiring double-material injection molding technology, making China's dual-material injection molding technology increasingly widely used in China.
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