Operation steps and key points of aluminum extrusion press

The application of aluminum extrusion press includes installation, adjustment, commissioning, operation, protection and repair. Although it seems cumbersome, it only needs to clarify the operation. But as an operator, it is necessary to understand the structural characteristics of the aluminum extrusion extruder operated by them, so as to correctly master the kneading technical conditions and operate the machine correctly. There are many kinds of extruding machines for aluminum profiles. Although the key of operation is different, they have their similarities. Today we are going to introduce the operation and key of the aluminum extrusion press.

1. Preparatory homework before driving

1. Used for kneading plastic. The raw material should arrive at the required dry request and need to be further dry when necessary. The particles and the mechanical impurities are removed by sifting the material.

2, check the equipment of water, electricity and gas system is not normal, to ensure that water, gas path dredge, no leakage, electrical system is not normal, heating system, temperature control, appearance is not reliable operation; low speed operation auxiliary empty, survey equipment is not normal operation; start the vacuum pump. The survey work is not normal; in all parts of lubrication lubrication equipment. If the fault is found to be eliminated in time.

3. Install the head and set the set. According to the type and size of the commodity, the standard of the machine head is selected. Put the head in the following order.

Two. Drive

1, after the constant temperature, you can start the car. Before driving, the bolts of the head and kneading machine should be tightened again to eliminate the difference between the bolt and the thermal expansion of the head. The tightening order of the bolts is diagonal tightening, and the force should be even. When tightening the head flange and nut, ask for the joint close near, otherwise the material should be run.

2, drive, select the drive button, then the drive button, and then slow rotation screw speed adjustment knob, screw speed slow start. And then gradually speed up, a few extra materials. Pay close attention to the changing status of the mainframe ammeter and the indication head. And according to the demand with sufficient material, double screw kneading machine adopts uniform metering feeder to feed.

3, when the discharge is uniform and outstanding people of plastic sleeve traction. With experience of gelation degree of discrimination can be based on the material, usually kneading the appearance of discrimination, namely the appearance of shiny, no impurities, no foam, coke material and color, hand kneading material extrusion fine to a certain level does not appear burr, cracks, have certain elasticity, now clarify plasticizing outstanding. If the plasticization is bad, the screw speed, the barrel and the head temperature can be properly adjusted until the request is reached.

4, in the process of kneading production, we should check the technical parameters regularly and fill in the technical records according to the technical request. Check the quality of the product according to the quality inspection standard and find out the problem in time. Back home, three parking

1, stop the feeding, the plastic extrusion in the kneading machine, when the screw is exposed, close the machine and the head of the machine, stop the heating.

2, close the aluminum extrusion machine and auxiliary power supply, so that screw and auxiliary machine stop operation.

3, open the head of the joint flange, open the head. Organize the various parts of the porous plate and the head of the machine. When finishing to avoid damage to head inside and outside the table, residual material in die steel, steel sheet using law to organize, and then the plastic adhesion in the die grinding and polishing with sandpaper, in addition, coated with oil or silicone oil rust.

4, screw and barrel finishing, remove the head, restart the main engine, add parking material (or broken material), clean the screw and cylinder, at the moment, screw at low speed (sr/min) to reduce wear. When the parking material is powdered and thoroughly kneaded, the remaining granular and powder can be repeatedly blown out from the feeding port and the exhaust port by compressed air, until there is no residual material in the cylinder, after the screw speed is reduced to zero, the kneading machine is stopped, and the total power supply and the total cold water valve are closed.

5, aluminum extrusion machine safety project should pay attention to in the kneading time are: electricity, heat, mechanical rolling and heavy parts handling etc.. It is necessary to prepare a kneading machine shop lifting equipment, dismantling head screws and heavy components, to ensure the safety in production.