The Development History of Metal Plastic Coating in Dalian:

The Development History of Metal Plastic Coating in Dalian:

At present, Dalian Metal Plastic Coating mainly uses spray free plastics such as spray free PP, spray free ABS, spray free PC, spray free PC/ABS, spray free AS, etc. Its application fields cover household appliances, electronic appliances, automobiles, 3C fields, rice cookers, washing machines, air conditioning panels, mobile phone cases, automotive accessories, etc.

With the improvement of the national economic level, consumers' requirements for environmental protection are becoming increasingly high. Spray free plastics have emerged in response to this demand. The concept of "spray free" has existed since the 1990s, and now more and more plastic products are using spray free plastics. Compared with traditional spray plastic, spray free plastics are more environmentally friendly and have lower costs. Whether from the perspective of consumers or manufacturers, they are a much better choice than spray plastic. Therefore, the market prospects of spray free plastics are very broad, and it can be said that it is an inevitable product that conforms to the development of the times.

If storage conditions are necessary for Dalian metal plastic coating, it should be ventilated and dry. The higher the humidity, the faster the oxidation rate. It does not require a certain amount of humidity like paint, but the plastic substrate will have a swelling rate. The temperature should be constant and the environment should be dry. There are downward pressure press and upward pressure press. The molds used for compression molding are called compression molds, which are divided into three categories; Overflow mold, semi overflow mold, and non overflow mold. The main advantages of compression molding are the ability to mold larger flat products and mass produce them, while the disadvantages are long production cycles and low efficiency.

Transfer molding is a molding method for thermosetting plastics. During molding, the molding material is first heated and softened in a heating chamber, and then pressed into a heated mold cavity to solidify and form. Extrusion method is mainly used for the molding of thermoplastic plastics, and can also be used for certain thermosetting plastics. The extruded products are continuous profiles, such as pipes, rods, wires, plates, films, wire and cable cladding, etc. Then, the resin is further cured through a heating chamber to prepare unidirectional high-strength continuous reinforced plastic profiles. There are three types of resins commonly used for extrusion molding: unsaturated polyester, epoxy, and organosilicon.

Dalian metal plastic coating refers to the continuous plasticization of plastic and its squeezing into a mold cavity at a certain temperature. After the plastic fills the cavity, the screw stops rotating, and the material inside the mold is kept under pressure for an appropriate period of time by the thrust of the screw, and then cooled and solidified. During the injection process, the plastic in the flow channel remains in a molten flow state and does not come out together with the product during demolding, so there is no residue in the flow channel of the product. This molding method not only saves raw materials and reduces costs, but also reduces processes, achieving fully automated production.