The correct operation method for the production of plastic extruder

The first production sequence of the plastic extruder is as follows:

    1. Clean up the environmental sanitation of all equipment on the plastic extruder production line.

    2. Clean the equipment and clean the equipment.

    3. Check the quality of the lubricating oil in the oil tank of the cabinet and carry out proper treatment (filter or replace according to the quality of the lubricating oil, and increase the amount of lubricating oil).

    4. Clean all lubrication parts and oil pipelines, except for dirt in the oil cup.

    5, inventory, cleaning plastic extruder production tools, placed neatly.

    6. Check whether the oil seal in the inlet and outlet of the barrel is intact; remove the dirt in the hopper and do a good job of sanitation.

    7. Check for looseness of each fastening screw and tighten as appropriate.

    8. Clear the dust inside the control box and the instrument box; check whether the connection of each line is tight; send power test, test

    The insulation resistance of the motor, electric heating device and electronic control parts shall comply with the relevant regulations.

    9. Test whether the bearing, gas, and oil pipelines are unobstructed and check for leaks.

    10, pull the V pulley, the screw should be easy to rotate, no block phenomenon.

    11. Remove the oil stain on the molding die and check that the parts of the mold should be clean and free of rust. Then assembled in

    On the barrel (if you need to add a filter and a manifold, you should first install these two parts in the barrel and then install the mold)

    12. After the mold is installed, the gap between the die and the mandrel should be properly adjusted to achieve uniformity.

    13. Check the quality of the raw materials used for production (Verify whether the grade of the material matches the process requirements, whether the pellets are uniform

    Uniform, whether the material is wet, whether there are impurities, etc.).

    14, the empty running point car trial turn. Start the lubricating oil pump, and then rotate the screw at low speed after 3 minutes of operation.

  Check for abnormalities and turn off the lube pump after everything is normal.

    15. The machine and the mold are heated to heat up. After the process temperature is reached, the heating temperature is not less than

  Ih.

    16. Use a mercury thermometer to detect the temperature of the barrel and the molding die, and correct the temperature of the meter on the control box.

  It is consistent with the temperature of the mercury thermometer.

    17. Check the test feeding device and fill the hopper with raw materials.

    18. Pull the V-belt to rotate again, it should be easy and flexible, without blockage.

    19. Start the lubricating oil pump, work 3..., check if the spray lubricating oil is in place.

   20, low-speed start drive screw rotating motor, observe the voltmeter, ammeter pointer swing is normal,

  After everything is normal, start feeding.

    21, feeding to the barrel, the initial feeding is less and uniform, observe the current meter pointer swing at any time

  In case, it should be within the allowable rating (allowing an instantaneous overload).

    22. When the mold mouth is discharged, the uncompleted plasticized material and the dirt are first removed, and the plasticizing quality of the raw materials is checked.

  Appropriately adjust the process temperature of the barrel and the forming mold as appropriate, and adjust the mouth according to the operating condition of the extruded tube blank

  The gap between the mold and the mandrel until the tube runs straight.

    23, the plastic extruder production line of the auxiliary machine driving (referring to the tractor and cutting machine).

    24, stop the screw rotation, install the sizing sleeve, air block, turn on the compressed air (used when the internal pressure is legal)

  Or turn on the vacuum pump line (used when vacuum sizing).

    25. The low speed start drive screw rotating motor, and the extruded tube blank is introduced into the cooling and cooling water tank.

    26. After the extruded tube blank is cooled and shaped by the water tank, the tube sample is taken and the forming quality of the tube material is measured.

    27. According to the pipe test results, adjust the process temperature, air pressure and vacuum of the barrel and molding die.

  degree. Process conditions such as cooling water and traction speed that affect the quality of pipe forming, so that product quality can be molded

  begging.

    28, after the pipe quality meets the requirements, the working speed of the screw should be gradually increased until the normal operation begins.

  Trumpet products.

    29. After the pipe production and extrusion work enter normal operation, the operator should always inspect and check the temperature of each part of the bearing.

  The degree should not exceed 45 ° C; check the current change of each power supply equipment; whether the sound of each transmission part is normal;

  Whether the pipe operation is stable; whether there is leakage in each of the air supply and water supply pipes.