More and more people can't live without plastic. Plastic is widely used in production and life because of its good performance. In the process of plastic processing, technology is the basis to guide our plastic processing and production. So, what is the CNC processing technology of plastic mold? For plastic mold CNC processing technology, let's make a specific introduction below.
Process analysis of plastic parts
1. Ingredients
In addition to polymers, the raw materials used in plastic processing also need to add various plastic auxiliary agents, such as plasticizers, stabilizers, lubricants and fillers, in order to improve the forming process and the use performance of products, so as to reduce the processing cost of products.
2. Shaping
This is the key link in plastic processing. In this link, the plastic will be reasonably used through the forming method according to its thermoplastic, thermosetting, initial form, product shape and size, so as to achieve the desired effect.
The main methods of processing thermoplastic include extrusion, injection molding, calendering, blow molding and thermoforming.
The main methods of processing thermosetting plastics are molding, transfer molding, and injection molding.
Similar to plastic processing, rubber can also be processed by the above method. In addition, raw materials can also be cast with liquid monomers or polymers. In these plastic mold processing methods, the most commonly used are extrusion and injection molding, which are also the two most basic plastic forming methods.
3. Machining
The mechanical processing of plastics requires the help of metal, wood and other processing methods, which can produce products with accurate size but small quantity. However, due to the great difference between the properties of plastic and metal and wood, the thermal conductivity of plastic is relatively poor, and the coefficient of thermal expansion and the amount of elastic mold are low. Therefore, when the fixture or pressure is too large, deformation will occur, and attention should also be paid to melting and adhering to the tool during cutting. Therefore, when machining plastics, the cutting tool and cutting speed should conform to the characteristics of plastics.
4. Join
There is a big gap between the methods of joining plastics and other materials. The most commonly used ones are welding and bonding. Welding is hot-air welding with welding rods. Bonding is to use adhesive as required.
5. Surface finish
This is to make plastic products more beautiful. The commonly used decoration methods are
Mechanical finishing: it is to use some mechanical tools to remove burrs and burrs on plastic products, so as to achieve the purpose of trimming dimensions.
Finishing: apply paint on the surface to brighten the surface, and stick the surface of products with patterned film.
6. Assembly
The assembly process of plastic processing is to use the methods of bonding, welding and mechanical connection so that plastic parts can be assembled into the required shape.
