Injection molding machine maintenance methods

Electrical parts

1. Wire connector inspection

Unfastened wires in the connector will cause high temperature or spark damage at the connector position. A poor connector will also affect the signal transmission; the connector on the contactor will be easier to loose due to the vibration of the electromagnetic action, so it is necessary to check the wire connector regularly Position and tighten.

2. Electric motor

Karaniwan, the motor is air-cooled. The accumulation of dust causes difficulty in heat dissipation. Samakatuwid, it is cleaned regularly every year. A motor overload cutoff is usually installed in the circuit. The limit current of the protection device is adjustable and should be adjusted according to the motor power. Kasabay nito, once the overload protector is activated, it should be determined to check whether there is phase loss, poor contact or high oil temperature before pressing the return position switch.

3. Heating cylinder and thermocouple

Ang heating cylinder should be checked regularly to ensure that it is fastened to ensure effective heat transfer. The burning of the heating cylinder is not easy to detect in normal production. Para sa kadahilanang ito, pay attention to the working condition of the temperature controller and judge whether the heating cylinder is normal. Sa karagdagan, the common damage of the heating cylinder is the wire connection. Due to the poor joint, the contact resistance increases, and the local overheating of the connection causes the interface to be oxidized and damaged.

Mechanical part

1. Template parallelism

The parallelism of the template can best reflect the condition of the clamping part. The non-parallel template will make the product unqualified and increase the wear of the equipment and mold. The parallelism of the template can be initially reflected by the movement of the tail plate during mold clamping and the appearance analysis of the product, but the exact situation needs to be detected with a dial indicator and other instruments. The adjustment of the parallelism of the template must be carried out by a familiar person in steps, otherwise improper adjustment will cause greater damage to the machine.

2. Mold thickness adjustment

The mold thickness adjustment system should be used regularly to adjust the mold thickness from the thickest to the thinnest to ensure smooth movement. For machines that use the same mold for a long time, this inspection must be performed to avoid malfunctions.
3. Central lubrication system
All mechanical moving parts need to be properly lubricated, and the central lubrication system is one of the must-haves for the current iniksyon paghuhulma machine. The amount of oil in the central lubrication system should be checked frequently to see if it is full, and the lubricating oil used must be clean and free of impurities to ensure that all lubricating positions have lubricating oil supply. If the oil pipe is blocked or leaking, it should be replaced or repaired immediately. Most mechanical wear occurs due to lack of lubrication, so adequate attention must be paid to lubrication.

4. Keep all movements smooth

Vibration or unsmooth movement may be caused by improper speed adjustment, speed change and uncoordinated time, or mechanical or oil pressure adjustment. This kind of vibration will accelerate the wear of the mechanical parts and loosen the tightened screws, so vibration should be reduced and avoided.

5. Bearing inspection

When the bearing is working, there are abnormal noises, or the temperature rises, it means that the inside of the bearing has been worn out, and it should be checked or replaced in time and refilled with grease.

6. Injection system

Ang injection screw, check ring and barrel constitute the heart of the iniksyon paghuhulma machine, which determines the quality and efficiency of the processing and must be kept in good working condition. Una, take necessary measures to prevent non-plastic debris from mixing into the plastic material flow, and then pay attention to checking the correct gap between the screw and the barrel, and the check ring and the barrel. The normal gap should be able to seal the plastic backflow and produce plastic When it is found that the melting action is slow, the melting material has spots and black spots, or the product is unstable, the wear of the screw, the non-return ring and the barrel should be checked.