The injection molding machine is divided into vertical, horizontal, and full -electric.The injection molding machine can heat the plastic, apply high pressure to the melting plastic, so that it will be ejected and full of mold cavity.Let me introduce relevant knowledge.
Injection molding machine maintenance
1. Daily inspection
Check and adjust the safety facilities every day. It is necessary to ensure that the safety facilities are normal in order to use the operating machine; check the amount of oil in the lubricant, and you must add the new oil with the same number of brands; check the oil level on the hydraulic oil tank.If you reduce to the middle line of the liquid level, add the hydraulic oil to the middle line above the middle line, and you must add the new oil with the same number of the same number; after 1,000 hours of operation, you need to replace or clean the oil absorption filter, hydraulic oil, clean the fuel tank; when it runs 5000For an hour or at most one year, you need to replace or clean the air filter and hydraulic oil. Pay attention to the new and old hydraulic oils cannot be mixed; when running 20,000 hours or at most 5 years, check and replace the sealing ring and wear -resistant ring of the hydraulic oil cylinder, replace the high pressure to replace the high pressureHoschen pipes; every 3 years, replace the controller (host) battery; every 5 years, change the battery on the operating panel.
2. Pay attention to lubrication
During the use of injection molding machines, it is necessary to observe whether the lubrication points of the injection molding machine are in a normal working state.Note that the lubrication time must be sufficient to ensure that each lubrication point of the entire lubrication system is well lubricated.The lubricating mold (interval time) of the machine and each lubrication time are achieved by the reasonable setting of the computer parameter.Regularly observe the working conditions of the lubricating system and keep the lubricating oil in the fuel tank in a reasonable oil level.If you find poor lubrication, you should lubricate in time and check the lubrication status of each lubricating point to ensure that the machine is well lubricated.
3. Check the air filter
The role of the fuel tank air filter is to breathe the fuel tank and prevent the dust from the outside world from entering the fuel tank. Therefore, it is a very important part that needs to be maintained regularly.The air filter is installed on the top of the fuel tank. When cleaning, let go of the cover first, replace the air filter filter element, and then re -wrap the cover.Note that the cover must be tightened, otherwise the oil will splash.
Operating procedures for injection molding machines
1.1 Preparation before booting by injection molding machine
1. Clean up the surrounding environment of the equipment, and it is not allowed to store items that are not related to production.
2. Clean up the workbench and equipment inside and outside the equipment.
3. Check the control switch, buttons, electrical lines, operating handles, hand wheels, or failure.Each switch and handle should be in the position of "broken".
4. Check whether the safety protection devices of each department are intact and sensitive to work.Check whether the "emergency stop" is effective and reliable, whether the safety door sliding is flexible, and whether the switch can touch the limit switch.
5. The safety protection device on the equipment (such as mechanical lock rods, stopping boards, various safety protection switches, etc.) is not allowed to move casually, let alone modification or intentionally lost its effect.
6. Check whether the screws of each part are tightened and whether there is any looseness. If the parts are abnormal or damaged, the leader should be reported to the foreman to handle or notify the maintenance personnel for handling.
7. Check out the cooling water pipelines, try water to see if the water flow is smooth, whether it is blocked or dripped.
8. Check whether there is a foreign body in the bucket, and no items are allowed to be stored above the fight.
1.2 Injection molding machine boot
1. Close the total power switch of the machine tool, check whether the equipment leaks, and preheat the barrel and mold according to the setting process temperature requirements. When the temperature of the barrel is reached, the process temperature must be kept for more than 20 minutes to ensure that the temperature of each part of the barrel is temperature.Uniform.
2. Open the cooling water valve of the oil cooler, cool the oil return and water transport throat, and click the oil pump. If the abnormal phenomenon is not found, the oil pump can be officially activated. After the screen is displayed on the screen, it can only run.Whether the role of the security door is normal.
3. Manually start the screw rotation and check the sound of the screw rotation.
How to choose an injection molding machine
1. Select the right type: product and plastics determine the model and series.
Because there are many types of injection molding machines, we must first correctly determine which injection molding machine is suitable for this product, such as vertical and horizontal type, or which series of injection molding machines.For example, general thermoplastic plastic or electro -wood raw materials or PET raw materials are monochrome, two -color, multi -color, mezzanine or mixed color.In addition, some products need to be high -stable (closed circuit), high precision, ultra -high radiation speed, high -voltage pressure or rapid production (multi -circuit) and other conditions. It is also necessary to choose a suitable series to produce.
2. Put it: The "big column distance", "mold thickness", "minimum size of mold" and "mold size" of the "big column", "mold thickness", "mold thickness", and "mold size" of the mold size are appropriate to confirm whether the mold is put down.
(1) The width and height of the mold must be less than or at least or less than the inside of the pillar.
(2) The width and height of the mold should be within the size range of the mold disk.
(3) The thickness of the mold needs to be intervened between the mold thickness of the injection machine.
(4) The width and height of the mold must meet the minimum mold size recommended by the injection molding machine. It is not too small.
3. Can be used: whether the mold opening itinerary and "mold support itinerary" by molds and finished products are sufficient to take out the finished product.
(1) The mold opening itinerary needs to be at least more than twice the height of the finished product in the direction of the switching mold, and the length of the vertical lane (Sprue) needs to be contained.
(2) The modeling itinerary must be sufficient to push the finished product.
4. Locking: The number of tons of "locking power" by products and plastics is determined.
When the raw material is injected with a high -voltage injection of the mold acupoint, the power of the mold support will be generated. Therefore, the lock unit of the injection molding machine must provide sufficient "mold lock force" so that the mold will not be opened.The calculation of the demand for the locking power is as follows:
(1) Find the projection area of ??the finished product in the direction of the switching mold.
(2) Modeling force = projection area (CM2) × module acupoint in the direction of the switching mold (KG/CM2).
(3) The pressure in the mold is different from the raw materials. The general raw material is 350 ～ 400kg/cm2.
(4) Machine locking power must be greater than the power support power, and for the sake of insurance, the machine locking force usually needs to be greater than 1.17 times more than 1.17 times.
At this point, the specifications of the molding unit have been preliminarily determined, and the number of tons of the car is roughly determined, and then the following steps must be performed to confirm which screw diameter of the ejection unit complies with the need.