How are the air compressors used for injection molding machines used in the injection molding industry?

The plastic products used in our daily life come in a variety of styles, round, square or even oddly shaped, but do you know how they are made? The answer is an injection molding machine. The injection molding machine needs to use an air compressor when shaping the plastic. Below, we will start from the principle and introduce to you in detail the role of air compressors for injection molding machines, and the selection points for air compressors for injection molding machines.

The injection molding industry is a relatively large industry in the national economy, such as injection toy molds, footwear molds, container molds, plastic wood molds, tube molds, aviation molds, rotomolding molds, apparel molds, automobile and motorcycle molds, agricultural tool molds, etc. Need to apply to air compressor. What about the role of air compressors for injection molding machines? This depends on different situations! The selection of air compressors for injection molding machines is also very different under different circumstances.

Air compressors for injection molding machines are widely used in the injection molding industry

The role of air compressors for injection molding machines? How are the air compressors used for injection molding machines used in the injection molding industry?

The principle of air compressor for injection molding machine: Air occupies a certain space, but it has no fixed shape and volume. When pressure is applied to the air in a closed container, the volume of the air is compressed, increasing the internal pressure. When the external force is removed, the air will return to its original volume under the effect of internal pressure. If there is a movable object in the container, when the air returns to its original volume, the object will be pushed out by the pressure of the air in the container. This principle is widely used in production and life.

What is the role of air compressor for injection molding machine?

In the injection molding process, there is also a technology that can make the role of compressed air very important. That is gas-assisted injection molding technology. The role of air compressors for injection molding machines-basically all thermoplastics used for injection molding and general engineering materials (such as PS, HIPS, PP, ABS ...) are suitable for gas-assisted technology. At present, gas-assisted technology is widely used in various plastic products, such as: televisions, refrigerators, air conditioners or audio enclosures, automotive plastic products, home appliances, daily necessities, toys, etc.

Injection molding machine operation, daily maintenance

Injection molding machine is a modern and efficient machinery production equipment with high input, large scale, large consumption and high output. Due to the fully automated operation and high-efficiency operation of the injection molding machine, the loss of various parts of the machine is relatively large. In this working state, even the failure of one part can cause the strike of the entire machine, resulting in production stagnation Reduce production efficiency. Therefore, regular maintenance of the injection molding machine is the key to ensuring production.

1. Maintenance content of injection molding machine

Although the operation of the injection molding machine is simple, the high degree of automation makes it equipped with mechanical, hydraulic, electrical and special equipment with a high degree of professionalism and a high degree of operation coordination. Therefore, in daily maintenance, the maintenance content involved is relatively extensive.

The daily maintenance of the injection molding machine mainly includes the following: check whether the parts are worn, whether the lubricating oil is in place, and the cleanness and integrity of the oil parts or devices; check the ventilation of the IQT and electrical box; check whether the use of wires and voltage is normal ; Check whether the cooling system is normal and whether the blanking pipe is blocked; check whether the mold device is normal; check whether the screws and the interfaces are loose; check whether the various pressures such as oil pressure and nitrogen pressure are normal; check the cleanliness of the drive disk and many more.

2. Institutionalization of daily maintenance of injection molding machine

The maintenance of the injection molding machine should be planned on a daily, quarterly, and yearly basis, and the content areas that need to be inspected and maintained at each stage should be listed one by one, and a checklist should be formed and registered to facilitate the future inspection and filling of vacancies.

It is also necessary to establish a complete troubleshooting system. Every time a worker repairs a fault, they should record it and summarize it monthly to form a "maintenance record sheet". The establishment of the "repair record sheet" can pave the way for the statistics, sorting and analysis of future faults, which can better Grasp the cause and frequency of failures, enhance the troubleshooting efforts, and effectively promote production.

In social production, every kind of production equipment needs certain maintenance, because long-term high-intensity work will definitely cause losses to the equipment. In order to prevent accidents and increase output, regular maintenance is essential.

Introduction to the basic knowledge of injection molding machine

Explanation of some common configurations of injection molding machine

Ceramic heating ring and its control

The temperature control precision of the heating barrel and the nozzle should be high, and the temperature fluctuation of the molten material should be small, so as to ensure the stability of the product quality.

The cylinder heating ring should use ceramic insulation heating ring;

The control method can adopt PID control;

The temperature of the precision injection molding machine should generally be controlled within ± 0.5 ° C.



Equipment and mold interface

Built-in hot runner temperature control system:

Composition: PID temperature control system + SSR (solid state relay) + fuse + ammeter

By controlling the opening time of the gate, it is ensured that the cavity is filled smoothly and the melt flow is balanced, and the weld mark is eliminated.

         Injection molding machine is a modern and efficient machinery production equipment with high input, large scale, large consumption and high output. Due to the fully automated operation and high-efficiency operation of the injection molding machine, the loss of various parts of the machine is relatively large. In this working state, even the failure of one part can cause the strike of the entire machine, resulting in production stagnation Reduce production efficiency. Therefore, regular maintenance of the injection molding machine is the key to ensuring production.

Work steps and precautions in injection molding workshop

Work steps and precautions in injection molding workshop

1. Preparation before starting

1. purpose:

Ensure that the machine can operate normally after being turned on to avoid accidents.

2. Steps and methods

1> The operator first checks the machine to ensure that the machine is clean and free of foreign objects blocking the machine and work station.

2> Whether the electrical installation is clean and whether there is leakage in the insulation facilities. If there is any problem, it must be solved first.

3> Check whether the lubrication system and cooling system are smooth and leak-free.

4> Check whether the mechanical safety device is malfunctioning, check whether the fastening screw of the safety device is loose, whether the fastening nut of the mold is loose, whether the parameter setting of mold opening on the display is abnormal, and whether the selected automatic and semi-automatic modes are normal.

5> If the above is normal, you can start the motor, respectively open the front and rear safety doors, manually operate the machine, check whether there is mold clamping action, if there is any abnormality, you must first repair and eliminate the fault.

2. Start-up trial operation

1. purpose:

Check whether the machine can work normally.

2. Steps and methods

1> Turn on the power and start the motor.

2> During the formal operation, the operator should also pay attention to whether the oil pump motor sound is normal, whether there is noise, whether the machine moving part (such as machine winch, crank, crosshead, etc.) and whether the mold is opened or locked or other abnormalities sound.

3> Only when the machine and mold are operating normally, can the machine be officially started.

3. Precautions

1> Once the operator finds a machine failure or an electrical failure, he should immediately stop the oil pump motor, cut off the power supply, and immediately report to the workshop management personnel.

Third, start production

1. purpose:

Ensure that qualified products that meet the requirements are manufactured.

2. Steps and methods

1〉 Preparation before formal production

○ 1 The operator must first prepare packaging materials (such as carton, pearl cotton, blister tray, etc.) and processing tools (such as nozzle pliers, blades, etc.) according to the products produced before production.

○ 2 Prepare work bench and processing position.

2〉 Turn on

○ 1 The operator should be in place immediately after receiving the start-up instruction.The operator should use the left hand to support the safety door.When the mold is opened, the left hand of the operator opens the safety door and the right hand is ready to take the product. (If you need to take the spout, you should take the spout first ) When the product is ejected, use your right hand to remove the product.Some products need to be taken in the direction.The operator should take it correctly under the guidance of the technical staff to avoid straining the product (when taking the product, the hand must not touch the mold To avoid bruising or burns).

○ 2 After taking out the product, immediately close the front safety door with the left hand, and the machine performs the next cycle.

3〉 Check the product

○ 1 After closing the safety door, the robot should perform a self-check on the product and compare it with the sample provided by the customer or the quality inspection department. (1) Is there any obvious difference in color;

(2) Whether there is lack of glue (not full), shrinkage, and whether there is obvious joint line;

(3) Whether there is crack, top height, top white, broken column, blind hole;

(4) Whether there are obvious draping, dragging, splashing, and air lines;

(5) Whether there are obvious color lines and color points.

(6) If there is no abnormality, the product can be submitted to QC for confirmation. If it is confirmed as qualified, the packaging process can be carried out.

(7) If the operator finds that the product is inconsistent with the model, he must immediately report it to the technical staff or management personnel for processing until the product is qualified.

4〉 Processed products

○ 1 For products with spouts, use pliers. During the process, care should be taken to ensure that the nozzle is cut flat and the product is not damaged.

○ 2 Process the products with a sharp edge (a small amount of colloid in the product edge or empty hole position and thimble position).

(1) If the appearance requirements of the location where Pi Feng is located are not strict, you can use a knife to gently flatten it, and do not scratch the product.

(2) If the appearance of the location of Pi Feng is high, and it is the edge of the product, only lightly press with a smooth surface metal rod (such as a thimble, copper rod, etc.). The pressed product must keep the edge smooth, flat, and not Jagged).

(3) If the product is stained with oil, use nylon gloves and sprinkle with liquid to gently scrub, try to wipe in one direction