Operating procedures and precautions of industrial aluminum profile extrusion machine plant line
First analyze the process:
1. Before opening the aluminum profile extrusion machine plant line, ensure that there are no sundries and oil stains around the equipment and on the machine table
2. Prepare materials according to the production requirements and pour them into the chute according to the ratio requirements
3. Check the power status and confirm that the operation of each control cabinet is normal
1、 Industrial aluminum profile kneading machine host
It can be divided into the following:
1. The transmission and kneading system relies on the main frequency converter to control the frequency conversion speed regulation motor, which is transmitted to the screw step by step through the reducer, distribution box and cross spline. During this period, the program and parameter values entered in the frequency converter have been set when the equipment leaves the factory and cannot be changed at will.
2. The heating and cooling system is composed of barrel heating and cooling, die head heating and screw core heating and cooling. It is controlled by the electric chamber program. The B & R temperature module is equipped with PID temperature control software to replace the traditional temperature control meter. The system can actively optimize the calculation of PID parameters in the heating process. After the calculation, it can also assign values manually according to the self-test. The temperature control is accurate to ± ℃. Its working principle is to give a temperature value in the heating section of each zone, such as 180 ℃, and the data are measured by thermocouples. When heating, with the gradual increase of temperature, the heating frequency gradually decreases and the heating time gradually shortens. When ≥ 180 ℃, the area begins to cool and the fan begins to work. (cooling can be divided into air cooling and oil cooling) when ≤ 180 ℃, start heating again, cycle back and forth, and finally reach equilibrium. The same is true for core temperature cooling, except that the set temperature is low and controlled at 80 ℃, and heat is transferred through the heat conducting medium. When the temperature is ≤ 80 ℃, the core temperature heating pipe heats up and supplies heat to the screw through the circulation of the oil pump. When the temperature is ≥ 80 ℃, the water supply solenoid valve of the cooler opens, and the oil is cooled by the cooler and circulated by the oil pump to take away the residual heat in the screw. On the basis of active control, another manual forced cooling function is set in the second, third and fourth zones of the barrel and the core temperature to control the instantaneous temperature rise.
3. The active feeding system is controlled by the transmission signal of the time relay or level meter. When there is a lack of material, the level meter transmits the signal, and the system starts feeding. When the material is full, the level meter signal is interrupted and the feeding is stopped.
4. The feeding system is also realized by the frequency converter controlling the frequency conversion speed regulation cycloidal pinwheel reducer. Its share is adjusted according to the speed of the host screw. The host current and torque are directly affected by the amount of feeding. Less feeding reduces the host current and torque. On the contrary, it increases. When the feeding is too much, the actual current exceeds its rated current or the torque exceeds its set value, the main timing overload alarm stops, which is usually controlled at 50% ~ 80% of the rated value.
5. The vacuum exhaust system is completed by directly operating the vacuum pump with a button. When the vacuum is turned on, the solenoid valve opens and when it is closed, the solenoid valve closes.
As for the products of industrial aluminum profile extruder, they all have their own design parameters, such as kneading weight, kneading volume, kneading metal, etc. do not exceed the product design parameters during kneading operation.
As for the transmission of industrial aluminum kneading machine, pay attention to the differences between single screw and twin-screw industrial aluminum kneading machines. Do not use them indiscriminately, otherwise it is easy to form irreversible problems for the products of industrial aluminum profile extruder.
2、 Operating procedures for industrial aluminum kneading machine:
1. Check whether the oil pressure system leaks oil and whether the air pressure is normal.
2. Check whether the conveyor belt, cooling bed and storage table are damaged and scratched.
3. Before stretching, the length of aluminum profile shall be recognized, and then the stretching rate shall be reserved to determine the stretching length, that is, the moving direction of the main collet. Generally, the stretching rate of 6063t5 is 0.5% - 1%, and the stretching rate of 6061T6 is 0.8% - 1.5%.
4. According to the shape of aluminum profile, the clamping method shall be recognized. Large section hollow profile can be inserted into tensile cushion block, but the clamping area shall be ensured as much as possible.
5. When the aluminum profile is cooled below 50 ℃, the energy is turned on to stretch the profile.
6. When there are twists and turns in the profile, the twists and turns shall be corrected first and then pulled.
7. The first and second pieces shall be tested to confirm whether the predetermined stretching rate and clamping method are appropriate. Visually twists and turns, twist and check the plane gap, flaring and parallel opening of the profile. If it is not suitable, the stretching rate shall be adjusted properly. The last page of the first page 8. When the normal stretching rate still cannot eliminate twists and turns, twisting, or several scales cannot be qualified, tell the operator to stop kneading.
9. The profiles on the cooling table shall not conflict, bump, overlap and stack with each other to avoid scratching.
The operation efficiency and service life of the industrial aluminum kneading machine are closely related to the device order of the industrial aluminum kneading machine. Generally, the equipment foundation of the industrial aluminum kneading machine should not only accept the component of the equipment itself and the component of production materials, but also accept the dynamic load effect during the operation of the industrial kneading machine. Therefore, it is necessary to carry out the equipment according to the corresponding device procedure.
1. Dig out the foundation pit according to the requirements of the equipment specification, and dig out the trench for electric wire pipe, upper and lower water pipe and compressed air pipe together;
2. Fix the wood formwork of the anchor hole according to the dimension interval of the anchor bolt hole of the industrial aluminum kneading machine. The wooden formwork of anchor hole shall be trapezoidal or conical with small top and large bottom;
3. The electrician shall lay down the transmission pipeline, and the plumber shall lay down the upper and lower water pipes and compressed air pipelines;
4. For the first root irrigation, anchor holes shall be reserved. Cover the root with straw bags and water twice a day after 24 hours. During the growth period of cement foundation, the ambient temperature should be above 5 ℃;
5. Seven days after the cement foundation is photographed, remove the formwork of the anchor hole, lift the industrial aluminum profile kneading machine, level it according to the orientation of the anchor hole, and roughly find the height, level and orientation of the ground wire;
6. Place the bolts for equipment fastening in the anchor hole. The bolts pass through the equipment connection hole and screw the nuts. Pay attention to the length of thread adjustment;
7. For irrigation anchor holes and fixing bolts, the growth period should exceed ten days;
8. A pair of inclined irons (with a slope of 1 / 10 ~ 1 / 20) and a flat steel plate are used as a group. The flat plate is the same as me. The inclined direction of a pair of inclined irons is opposite, combined on the flat plate, padded on both sides of the anchor bolt hole, and leveled with the inclined iron to slowly adjust the height of the base. Together, the industrial aluminum profile kneading machine base line coincides with the industrial aluminum profile kneading machine production line base line;
9. Pre tighten the anchor bolt, pre tighten each nut diagonally, and the tightening force shall be consistent;
10. Check the equipment level, base height and base line, tighten bolts everywhere, connect water and gas pipelines and connect electrical circuits.
It is worth noting that after the installation of industrial aluminum kneading machine, technicians should carefully read the equipment specification, and formulate the technology, operation procedures, material scheme, things and time for trial production of plastic products according to the requirements in the specification. Understand and understand the equipment structure and the function and effect of some parts, and memorize the function and usage of buttons and switches.
As a main component of industrial aluminum kneading machine products, the filter room needs to be replaced according to the different kneading products in application and operation. Pay attention to the operation process in the replacement to avoid the damage of industrial aluminum profile extruder due to improper operation.
1. Use a crane to lift the pre installed filter chamber in the preheating furnace to the filter chamber disassembly and assembly platform and finish the hot tightening
2. Lift the thermally tightened filter chamber into the corresponding position of the melt filter, and heat balance for 1 hour after fastening
3. Open the vent valve of the air filter chamber and slowly roll the hand wheel at the inlet end
4. When the pressure after filtration decreases slightly, it indicates that the filter chamber begins to feed. Stop the rolling hand wheel to ensure that the pressure after filtration does not change significantly
5. When the vent valve overflows the melt, tighten the vent valve
6. Roll in and out of the empty hand wheel slowly and evenly (subject to no large shaking of the filtered pressure) until the switch is in place
7. Investigate whether there is material leakage at each part. After there is no abnormality, cover the insulation board
8. after 2 hours of operation, confirm that the new filter chamber is normal, hang the vent valve of the filter chamber to be cleaned to relieve the residual pressure, and do not face the vent valve directly to prevent accidents
9. Remove the filter chamber and disassemble it while it is hot
10. Put the disassembled filter element into a special container and lift it and the filter chamber body to the fluidized bed for cleaning