Hisson Plastic Machinery Co., Ltd. 

Share the injection molding machine operation and maintenance knowledge

by:Hisson     2020-04-15
Will pay attention to the safety of the operation, when the machine is used for each operation to check the safety device of the machine, insurance plunger and the reliability of the safety door. Machine process, bear in mind that do not handle knob stretch into clamping mechanism among them. Take products, some want to open the door, to confirm the personnel safety and die within no foreign body, can close the door. In addition, in the operation of hand also can in no way to reach between the nozzle and the mold gate. Yu Xiuli mould, please close the oil pump motor. Molding products, because of varieties of raw materials, molding products area and different shape, the size of the need of the clamping force is also different, when moving mold please the minimum clamping force adjustment according to actual needs. In this way, can save the electricity consumption and the significantly extend the service life of the machine. Hydraulic system pressure control, in accordance with the requirements of each action executed in sequence, and should not be so high, use pressure reasonably, reducing energy consumption and prolong the service life of machine. , the position of the limit switch, also, in accordance with the requirements of molding products. Especially injected into the holding process of the adjustment of the switch point, must pay attention, it may lead to products molding deficiency or lead to products have such a high internal stress and flash, and cause higher mode, thus make the mould cannot open. When there is no material in screw or cylinder, unfavorable use high RPM ( The most good under 30 r/per) 。 For materials with screw screw groove ( Under-burnt clinker from the nozzle mouth) when it is squeezed , the screw again rise to the need of power value, in case due to idling speed is so high for such a long time and scratch screw or cylinder. Cylinder heated from room temperature to the required temperature, heat preservation for about 10 minutes, then can start to feed screw, residual cold material to ensure fully molten, avoid damage to the screw. Machine oil pump, relief valve in the factory has adjusted the, please never change casually. Start the machine works, 5 - if cooling water temperature rise After 10 ℃ ( Must be first to make it cooler in anhydrous water filling) 。 Gradually open water valve of the cooler, and to use the process of regulating water, to keep the oil temperature in 55 ℃ the following; Run cooler, avoid by all means is quickly open the cooling water inlet valve, due to the large amounts of cold water flows through the cooler, can make the cooler tube surface to form a layer of thermal conductivity is very poor 'layer' too cold, even if a large amount of water into the cooler after the result is still not to good cooling effect. Attaches great importance to the machine lubrication, implemented strictly in accordance with the operation requirements, under the condition of the lack of oil, the serious wear and tear parts, especially the clamping mechanism of connecting rod and the steel bushing, if lack of oil may be bitten, and unable to work. Replace the mould and the 'mode' operation, must first confirm template after four adjusting nut has been injected into full lubricating oil containing molybdenum disulfide. Plasticizing a nitrogen-treated barrel and screw, heating connection thread part, due to work under high temperature, tear open outfit, threaded portion is to apply hot grease ( Red lead and molybdenum disulfide) In case due to bite dead and therefore cannot tear open outfit. ( The screw thread as a left-hand thread) 。 Mould of the installation surface has high machining accuracy, please use your bad mould installation surface and parallel degree, and mounting screw thread bad, the performance of the clamping mechanism to prevent injury and damage to the template. Mould installation two plane please never for a long time ( More than ten minutes) Make the mould at high pressure clamping condition, in case of connecting rod and steel set off oil, may make the mould unable to open ( It in ten minutes should be more and more attention to case of power failure) 。 Often keep clean on the surface of the starting with each other. At the end of the processing: the every time 1) Closing hopper blanking plug board, use the 'manual' operating mode, repeated injections to retreat and plastic material and injection, the remaining material as far as possible within the cylinder, corrosive materials with special material through the feeding tube screw clean. ( 2) USES the 'manual' operating mode, closed mould to make it in the free state ( Not completely lock state) 。 ( 3) Cut off the heating power supply, close the oil pump motor, to the total power and cooling water. ( 4) To prepare for the cleaning and maintenance of the machine. In the operation to the nameplate of each switch, not wrong operation, in case of damaged parts. Electric heating circle in use, due to heat expansion, may loose, in use, please note that check, often in real time on tight. Thermocouple probe should guarantee and cylinder on the thermometer hole good contact, after driving to check, found that poor contact, to tighten in real time. Seriously good earthed, regularly check the insulation condition of electrical components, to prevent electric shock. Check the low voltage circuit, please use the multimeter. To prevent injection molding machine temperature control instrument zero drift, every six months instead check calibration equipment maintenance department.
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