What are the processes involved in making paper-based friction discs?
First of all, we need to know what a friction plate is. Simply put, it is an annular friction disc that plays a role in transmitting power. Generally speaking, the appearance of the friction plate is annular and toothed, which can be divided into internal teeth and external teeth, and internal splines. (Splines, in short, are irregular teeth) Depending on the machinery and working environment in which the friction plates are used, the materials of the friction plates are also divided into many types. The most common ones are paper base, copper base, dual steel sheets, and asbestos. , no asbestos and other materials.
The most complex friction lining process is the paper-based friction lining. First of all, we need to make the paper-based friction layer. We use the same process as papermaking, beating and papermaking. In the papermaking process, elements such as iron red are added, and a papermaking machine is used to make paper with the same weight and specifications (outer diameter, thickness). piece. Then put it in the oven so that the paper can be fully dried. According to the specifications of the friction disc that needs to be produced, we use a mold to cut out the different paper-based rings required.
In this way, the paper-based friction layer of our friction plate is ready. Let's take a look at how the core plate of the friction plate is produced. Depending on the thickness and number of friction plates, the manufacturing process is also different. First, we select the steel plate according to the thickness of the friction plate core plate, and then use a punch to punch out the steel sheet of the required specifications. If the steel plate is too thick, more than 5mm, we use a laser to cut out the shape of the steel plate. For thicker steel sheets, more Carry out gear shaping so that the tooth shape will be clear.
After the core board is ready, we need to apply glue. The core board needs to be rolled through the gear hobbing machine, and the glue needs to be rolled back and forth 3 to 4 times. The color of the core board that has been rolled with glue will be brown. At this point, the core board is ready. Don’t forget that the ring-shaped paper circle that was dried earlier needs to be dipped into the glue twice. After the paper is soaked in glue, it will be fully absorbed. The paper will harden after the glue is applied. After we wait for the paper to dry, we can join it with the core board.
Finally, we use a vulcanizing press to press the paper sheet and core board together. Under the high temperature of the vulcanizing press, the glue, paper sheet, and core board are well bonded together, so that the paper-based friction plate is roughly formed. Finally, we take out the vulcanized paper-based friction plate, press out the oil groove or mill out the oil groove according to the groove requirements of different products, and then go through finishing processing, so that our paper-based friction plate is produced.
