Blow molding machine plasticizing system debugging
1) The heater of the plasticizer system must be evenly tightened, and the heater and heating surface should be tightly coupled. For mica heaters, use a rubber hammer to gently tap the fasteners to ensure a tight fit that facilitates heating and extends the life of the heater.
2) The thermocouple probe must have sufficient spring preload to ensure the accuracy of the temperature measurement.
3) The mold head bolts of the storage tank cannot be fully tightened. It can be lightly pressed to allow the cylinder to expand and contract; the cylinder shaft should be straight rather than curved.
4) Before heating, it is necessary to open the cooling water of the cylinder and the cooling water of the die to prevent blockage of the cylinder feeding section and prevent the sealing parts from aging and oil leakage. The gearbox and the cylinder on the die head.
5) The magnetic frame should be placed in the hopper to prevent the scrap metal from entering the screw, causing damage to the screw and mold parts or blocking the mold passage.
6) When the freezer is started, it is generally recommended that when the tube blank is extruded from the mold, the extrusion speed should be reduced and the speed should be gradually increased.
7) Before the pipe is usually extruded from the mold, the staff should not stand in front of the die head and the mold; in the first 3 lenses of the material storage tank, the personnel should be away from the lower part of the mold, and the manual injection pressure should not be too large (generally not More than 5 MPa).
8) The automatic injection pressure of the cylinder is generally not too large, and the actual injection time is generally greater than 5 seconds. Too fast will result in wall thickness tracking errors and melt fracture.
9) For machines equipped with a wall thickness control system, the wall thickness controller must first be manually activated and operated, and then the extrusion should be initiated to prevent the mold opening from being completely closed and the parts to be damaged.