Operation steps and key points of aluminum profile extrusion press machine



The application of aluminum profile extrusion press machine includes a series of links such as installation, adjustment, test run, operation, protection and repair. Although it seems cumbersome, in fact, it only needs to follow the instructions on the operation. However, as an operator, it is necessary to understand the structural characteristics of the aluminum profile kneading machine that he operates, to correctly grasp the kneading technical conditions, and to operate the machine correctly. There are many types of kneading machines. Although the keys to operation are different, they also have similarities. Today we will introduce the operation process and key points of the aluminum profile kneading machine in detail. 1. Preparatory work before driving 1. Plastic for kneading and forming. The raw materials should reach the required boring request, and the boring need to be improved if necessary. The material is sieved to remove agglomerates and mechanical impurities. 2. Check whether the water, electricity, and gas systems in the equipment are normal, to ensure that the water and gas paths are dredged and leak-free, whether the electrical system is normal, whether the heating system, temperature control, and various appearances are reliable; the auxiliary machine is empty Low-speed test operation, investigate whether the equipment is operating normally; start the vacuum pump of the setting table to investigate whether the operation is normal; add oil to the lubricated parts of various equipment. If any fault is found, remove it in time. 3. Install the machine head and sizing sleeve. According to the type and size of the product, choose the specifications of the machine head. Install the machine head in the following order. Second driving 1. You can start driving after the constant temperature. Before driving, you should tighten the head and the flange bolts of the kneading machine again to eliminate the difference between the thermal expansion of the bolts and the head. The order of tightening the head bolts is to tighten diagonally and forcefully Be even. When tightening the flange nut of the machine head, it is required to loosen it and tighten it together, otherwise the material will run out. 2. When driving, press the standby start button, then connect the start button, and then slowly rotate the screw speed adjustment knob, the screw speed will start slowly. Then gradually speed up, adding a few materials together. When feeding, pay close attention to the indication changes of the host ammeter and various indicator heads. And add enough material according to the demand, the twin-screw kneader selects the metering feeder to feed the material evenly and at the same speed. 3. When the die is uniformly discharged and the plastic is excellent, it can be used to pull the person to shape the sleeve. The judgment of the degree of plasticization requires experience. It can usually be judged based on the appearance of the kneaded material, that is, the appearance is shiny, free of impurities, no foaming, burnt material and discoloration, and the kneaded material is squeezed to a certain degree without showing Burrs and cracks have a certain elasticity. At this moment, it shows that the plasticization of the material is excellent. If the plasticization is poor, the screw speed, barrel and head temperature can be adjusted appropriately until the request is reached. 4. In the process of kneading and production, check whether various technical parameters are normal according to technical requirements and fill in the technical record sheet. Check the quality of the profile products according to the quality inspection specifications, and adopt the solutions in time when problems are found. First page not page 3. Parking 1. Stop feeding, squeeze out the plastic in the kneader, and when the screw is exposed, turn off the barrel and head power to stop heating. 2. Turn off the power supply of the aluminum extrusion press and auxiliary machines to stop the operation of the screw and auxiliary machines. 3. Turn over the connecting flange of the head and remove the head. Organize the perforated plates and the various parts of the machine head. In order to avoid damaging the inner and outer surfaces of the machine head when finishing, the residual material in the machine head is arranged with steel rules and steel sheets, and then the plastic adhering to the machine head is polished with sandpaper, and polished, and coated with engine oil or silicone oil. rust. 4. Arrange the screw and barrel. After removing the head, restart the main engine, add parking material (or crushed material), clean the screw and barrel, and use a low speed (sr/min orbit) for the screw to reduce wear. After the parking material is crushed into powder and kneaded thoroughly, compressed air can be used to repeatedly blow out the remaining pellets and powder from the feeding port and the exhaust port until there is no residual material in the barrel, then reduce the screw speed to zero and stop kneading. Kneader, turn off the main power supply and the main cold water valve. 5. The safety items that should be paid attention to during kneading of the aluminum extrusion press include: electricity, heat, mechanical rolling, and the loading and unloading of bulky parts. The kneading machine workshop must be equipped with lifting equipment, assembling and disassembling the head, screw and other bulky parts to ensure safe production.


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