Before starting the heating system of the plastic granulator, the pivots of the granulation electromechanical control cabinet should be carefully checked (the temperature control table), and the set value of the temperature control table is consistent with the process temperature (the temperature of the general chemical plastic barrel is set to 180~) 230 ° C, can not exceed 300 ° C). First open the die temperature of the granulation host and auxiliary machine, generally heating about 2h to 150~160 °C, then open the 7 mold temperature switch of the granulator host and the 3 mold temperature switches of the granulation auxiliary machine.
The single-die head adjusts the cavity of the middle plate to about 35 mm to expose the sealing surface. After the plastic granulator starts the heating system, the die cannot be twitched. (The new granulator directly twitches the die during the first heating process, which may cause the die surface to be pulled. When the machine is turned on and the glue emerges from the template, the intermediate template is lowered into position and the test machine is continued. In the production process, this method can also be used to extend the life of the plastic granulator die.
The double die will slightly offset the middle plate from the working position by about 35 mm. After starting the heating system, the die must not be twitched. (The new machine directly twitches the die during the first heating process, which may cause the die surface to be strained. When the machine is turned on and the rubber material emerges from the template, the intermediate template is lowered into position and the test machine is continued. In the normal production process In this method, the life of the plastic granulator die can also be extended.
Check whether the current indication value of each pivot heater is normal, and the heating time should be sufficient. Generally, after the process requirements are met, the temperature should be constant for about 5 minutes, which is suitable for manual cranking.
Start the main motor of the plastic granulator (when the speed control motor is installed or the inverter is installed, first adjust the speed control or frequency conversion knob to the low speed position 5HZ~15HZ, then start the motor. The speed regulation process should be slow and the speed should be gradually increased. High) Pay attention to the motor current change.
Adding auxiliary feeding system, cooling system, lubrication system, starting auxiliary feeding system, cooling system, lubrication system.
If there is no abnormality when the granulating machine rotates, the cutting can be started, and it is better to use a little cutting, until the material is extruded. The barrel is the upper funnel with a spiral feed; the snakeskin bag is the funnel below, with a spiral. The barrel material cannot be fed to the funnel below to avoid feeding too fast and may block the main screw. At this point, check the degree of maturing of the rubber compound and the required temperature. If there is a certain rubber extrusion in the die, stop the machine, move the screen, and move the stencil. The small granulator can only feed the barrel material, and the material of the snake skin bag can not be sent to the main screw because there is no screw feeding.