In addition to a good design structure, a door closer with excellent performance also needs to be realized with advanced production technology. This time we want to share with you the main process and characteristics of the main body of the door closer. :
Aluminum extrusion
The process principle of aluminum extrusion is to heat the aluminum alloy to a temperature between 400 degree and 550 degree to make it moldable, and then use the oil pressure of the extruder to extrude the material through the extrusion die to reach the desired position. The required appearance. The cost of the mold required for this process is low, the production cycle is fast, and the material density is high. If it is properly heat treated, it can achieve quite good strength, hardness and impact resistance.
Die casting, or pressure casting
It is a metal casting process. The process principle is to apply high pressure to the molten metal (such as aluminum, zinc copper alloy, etc.) after heating to inject the material into a high-strength mold. After a period of time, the mold can be taken out after opening it. Products. Compared with other casting technologies, the surface of die-casting is flatter and has higher dimensional consistency. This process requires higher mold costs, which is suitable for the production of workpieces with more complex appearances, and the cost is lower in mass production.
Sand casting
It is to inject molten metal (such as iron, stainless steel) into a sand casting mold made in advance under appropriate temperature range and conditions, and take it out of the mold after the molten metal is cooled and solidified, and after proper cleaning and processing, Get the required castings. This processing method is suitable for the production of products with complex shapes. The cost of molds required for this process is not high, and the appearance of the product is relatively rough, suitable for the production of iron or stainless steel products.