Key response measures after the emergency shutdown of the injection molding machine

During the operation of the injection molding machine, after pressing the emergency stop button in an emergency situation, the work did not end there.In order to effectively ensure the safety of equipment and reduce material losses, a series of rigorous and comprehensive follow-up safety confirmation and disposal measures must be followed up quickly.
1. Instant confirmation of the operating status of the equipment
Verification of screw and barrel: At the moment of emergency stop, we must first pay attention to the screw situation in the barrel.Due to inertia, the screw may not stop rotating immediately. Continuous rotation can easily cause excessive heating of the material, which will not only cause material degradation and performance deterioration, but may even cause serious consequences such as overheating and deformation of the barrel.The operator should approach the barrel and confirm whether the screw has been completely stationary through the observation hole or with the help of relevant inspection tools.If you find that the screw is still rotating slowly, under the premise of ensuring your own safety, try to intervene manually, such as using the manual disc turning device (if any) that comes with the equipment to slowly brake the screw to stop it from moving.
Record the opening and closing position of the mold: At the same time, the opening and closing state of the mold is very important.If the mold is being braked urgently during the opening and closing process, it is very easy to misalignment of the mold, strain the guide post or damage the cavity and other problems.Quickly check whether the mold is currently in a half-open, half-closed or other abnormal position, and make a detailed record.This record will provide a key reference basis for subsequent restarting of the equipment and repairing the mold, so as to avoid further damage to the mold caused by blind operation.
2. Handling of material-related issues
Barrel temperature control: The quality of the material is greatly tested after the emergency shutdown.Checking the temperature of the barrel at the first time shows that if the temperature is too high and continues to rise, the material is likely to decompose, carbonize, and become waste at high temperatures.Immediately turn off the heating device of the barrel. If the injection molding machine is equipped with a cooling adjustment system, increase the flow rate of cooling water or turn on the auxiliary cooling fan to reduce the temperature of the barrel as soon as possible to prevent material loss from increasing.
Nozzle material cleaning: Pay attention to the nozzle site. Usually during emergency shutdown, some materials that have been extruded or are in a semi-extruded state may remain at the nozzle.If these materials are not cleaned up in time, once they are cooled and cured, they will clog the nozzle and affect subsequent start-up production.Use professional tools, such as copper scrapers or high-temperature cloths, to carefully clean up the material at the nozzle to ensure that the nozzle is unimpeded.
3. Comprehensive system investigation and repair
Electrical system diagnosis: Turn to the electrical aspect and check the control panel of the injection molding machine.After the emergency stop operation, there is a high probability that various fault alarm information will be displayed on the control panel. These flashing codes are important clues for troubleshooting electrical faults.Common ones such as short-circuit alarms, overload prompts, sensor failures, etc., Based on the interpretation of these codes in the operation manual, the cause of the failure is preliminarily determined.For some simple faults, such as fuses, they can be replaced by themselves after the power is cut off; however, for more complex circuit problems, be sure to contact professional electrical maintenance personnel to deal with them. Do not blindly disassemble electrical components to prevent the risk of electric shock.
Inspection of mechanical systems: Mechanical systems cannot be ignored.Check one by one along the transmission chain, belt and other parts of the injection molding machine to see if there is any relaxation or fracture caused by emergency braking; check the oil pipe of the hydraulic system for rupture and oil leakage, and whether the liquid level of the hydraulic oil is normal; review the tightness of the fastening bolts of each connecting part to ensure that there is no loosening.If any mechanical problems are found, mark and repair them in time, and never let the equipment restart “sickly”.
4. Cleaning and maintenance of the surrounding environment
Inventory of work areas: The cleaning of the surrounding environment at the site of emergency shutdown should not be underestimated.Carefully check the workbench, ground, and equipment running track around the injection molding machine for any tools, parts, or debris left behind.If these items are not cleaned up during subsequent boot-up, they are likely to be involved in the equipment, causing the equipment to be stuck, damaged, and even cause more serious safety accidents.Clean up all irrelevant items out of the work area and keep the site clean and tidy.
Auxiliary equipment inspection: Injection molding machines are usually equipped with auxiliary equipment such as dryers, cooling fans, and conveyor belts, which work in concert with injection molding machines.After the emergency shutdown, it is necessary to confirm one by one whether these auxiliary equipment is shut down normally.For example, if the dryer continues to run, it may over-dry the material and affect its performance; the cooling fan does not stop, which may cause energy waste or interfere with subsequent temperature regulation.Ensure that all auxiliary equipment is in normal condition and lay the foundation for the smooth resumption of production in the future.
After completing the above series of comprehensive and detailed safety confirmation and disposal measures, and ensuring that all hidden faults have been eliminated, the injection molding machine can be restarted in accordance with the standardized start-up process.First conduct a no-load trial operation, closely observe the operating status of each component, and confirm that there is no abnormality, and then gradually resume normal production.In this way, after an emergency occurs, losses can be minimized and the continuous and stable progress of injection molding production can be guaranteed.