What are the emphasis on starting the injection molding machine

 What are the emphasis on starting the injection molding machine

One: Operational requirements

1. Before the machine heats up and starts production, open the cooling water valve and observe whether the water channel is unblocked.

2. Close the power switch on the side of the control box, turn on the power supply inside the machine, and press the motor start button on the panel to start the oil pump motor.

3. For the machine that is used for the first time and has not been used for a long time, after the oil pump is started, it must be run for a few minutes before starting to operate.

4. Turn on the barrel heating switch, turn on the electric heating power, adjust the thermostatic nozzle and temperature controller on the door of the box, set the temperature, observe the current of the ammeter, and judge the quality of the heating coil.

5. The test run should be carried out in sequence from manual → semi-automatic → fully automatic. At the same time, check whether the important fastening bolts are loose, and stop immediately if abnormalities are found. After confirming that it is normal or troubleshooting, then carry out the test run.

6. The barrel should be cleaned when the processing is stopped or when the material is changed. The cleaning should be carried out with the barrel heated. When the cleaning is completed, the heating switch should be turned off immediately. The cleaning is particularly important for processing easily decomposable plastics.

note:

①The injection seat must be returned when cleaning

②The temperature setting when the two raw materials alternate should be adjusted according to the requirements of high melting materials

③Use polystyrene to clean the decomposed materials

7. When processing stops, first turn the action switch to the manual position, place other action switches in the off position OO, turn the barrel heating switch to OFF, press the motor stop button to turn off the oil pump motor, and finally turn off the power switch to end jobs.

Two: Precautions for use

1. When using the machine, you must pay attention to operational safety. First check the reliability of the safety door. When the machine is running, remember not to put your hands into the clamping mechanism. When taking products, you must open the safety door. After confirming that the personnel are safe or the mold is free of foreign objects To close the safety door. During operation, the hand cannot reach between the nozzle and the mold gate. When repairing the mold, the oil pump motor must be turned off.

2. Due to the different types of raw materials, the size and shape of the product area, the required clamping force is different. When adjusting the mold, please adjust according to the minimum clamping force actually required, which not only saves power consumption, but also significantly extends the machine Life.

3. The pressure adjustment of the hydraulic system should be carried out separately according to the requirements of each action. It should not be too high. Using the pressure reasonably can not only save energy, but also extend the life of the machine. The position of each limit switch should also be adjusted according to the requirements of the finished product, especially the adjustment of the switching point from the injection to the holding pressure process, otherwise the product will be insufficiently filled, and on the contrary, the product will be too high. Stress or flash may even cause mold expansion, making it difficult to open the mold.

4. When there is no material in the screw or barrel, it is not advisable to use a high screw speed (preferably below 30 rpm). After the raw material is filled with the screw groove (when the melt is extruded from the nozzle), the screw speed is increased To the required value. In order to avoid scratching the screw or barrel due to too high idle speed or too long time.

5. It takes about 30 minutes for the barrel to heat up from room temperature to the required temperature. In the case of residual cold material in the barrel, keep it warm for another ten minutes. The screw can be started for feeding to ensure that the residual cold material is ully melted and to avoid damage to the screw.

6. The oil pump safety valve in the machine has been adjusted at the factory, please do not change it at will.

7. When the machine starts to run, when the cooling water temperature rises by 5C°-10C° (when there is no water in the cooler, it must be filled with water), then gradually open the water inlet valve of the cooler and adjust it during use Water intake keeps the oil temperature below 55C°. When starting the cooler, remember to quickly open the water inlet valve, because when a large amount of cooling water flows through the cooler, a layer of poor thermal conductivity will be formed on the surface of the cooler tube, even if a large amount of water enters the cooler in the future , The result is still not good cooling effect.

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