Injection molding machine is usually composed of injection system, mold clamping system, hydraulic transmission system, electrical control system, lubrication system, heating and cooling system, safety monitoring system, etc.

 

Composition of injection system: Injection system consists of a plasticizing device and a power transmission device.
Plasticizing device of screw injection molding machine is mainly composed of a feeding device, a barrel, a screw and a nozzle. Power transmission device includes injection cylinder, injection seat moving cylinder and screw drive device (melting motor).

Injection system is one of the most important components of injection molding machine. Generally, there are three main forms: plunger type, screw type, and screw pre-plastic plunger injection type. The most widely used is screw type. Its function is that in a cycle of injection molding machine, after a certain amount of plastic can be heated and plasticized within a specified time, molten plastic can be injected into mold cavity through a screw under a certain pressure and speed.

Function of clamping system: function of clamping system is to ensure that mold is closed, opened and ejected. At the same time, after mold is closed, sufficient clamping force is provided to mold to resist cavity pressure generated by molten plastic entering mold cavity, so as to prevent mold from opening and causing bad status of product. Composition of clamping system: clamping system is mainly composed of a clamping device, a mold adjustment mechanism, an ejection mechanism, a front and rear fixed template, a moving mold plate, a clamping cylinder and a safety protection mechanism.

Function of hydraulic transmission system is to provide power for injection molding machine according to various actions required by process, to meet requirements of pressure, speed, temperature, etc. required by each part of injection molding machine. It is mainly composed of various hydraulic components and hydraulic auxiliary components, among which oil pump and motor are power source of injection molding machine. Various valves control oil pressure and flow to meet requirements of injection molding process.

Electrical control system and hydraulic system cooperate reasonably, which can realize process requirements (pressure, temperature, speed, time) and various program actions of injection machine. It is mainly composed of electrical appliances, electronic components, instruments, heaters, sensors, etc. There are generally four control methods, manual, semi-automatic, fully automatic, and adjustment.

Heating system is used to heat barrel and injection nozzle. Barrel of injection molding machine generally uses an electric heating ring as a heating device, which is installed outside barrel and is detected by thermocouples in sections. Heat conduction through cylinder wall provides heat source for material plasticization; cooling system is mainly used to cool oil temperature. Too high oil temperature will cause various failures, so oil temperature must be controlled. Another location that needs to be cooled is near feeding port of feeding tube to prevent raw material from melting at feeding port, causing raw material to not be fed normally.

Lubrication system is a circuit that provides lubrication conditions for relative moving parts of moving platen, mold adjustment device, and hinge of connecting rod machine of injection molding machine, so as to reduce energy consumption and improve life of parts. Lubrication can be regular manual lubrication or automatic electric lubrication.

 

This model is mainly aimed at injection molding of connecting cables, various electronic, computer data cables and power plug cables, etc. Precise standard of injection products is not high, it is generally dominated by plastic materials such as PVC and PE. Specific applicable model specifications suitable for this product generally range from 15T to 35T. Due to specific capacity, modulus and configuration of each manufacturer's model, manufacturer must be asked to confirm specific parameters and specifications of model before purchasing.

Machine is vertical clamping and horizontal injection is named because there is no guide column, and clamping part is an English letter "C". Machine has a complex structure and a large amount of glue. Due to wide working area without guide posts, it is mainly suitable for injection molding of various safety power plugs, such as French plugs, American plugs, British plugs, etc.

This machine is mainly aimed at engineering plastics. Products have strict precision requirements. Precision or tiny inserts are injected together. It is also one of the most optimized injection molding solutions for inserts. Because machine has function of upper die being fixed and lower die sliding out. Double slide type has an upper die and a double lower die, and the two dies work alternately, which is more suitable for embedding or taking out precision hardware. Some two-color molds can also be molded by double-slide injection molding. Generally, molded products, such as electronic precision connectors, mobile phone connectors, integrated circuit components, etc., have disadvantage of double slide plates: two working positions, which increases labor costs.

Rotary series of vertical disc injection molding machines can be described as optimal solution for insert injection molding of precision parts and two-color molds, because this machine can be designed with one upper mold, two lower molds or multiple lower molds, which is more suitable for complex embedding and labor saving advantages.

Vertical-horizontal injection molding machine can be used for metal-coated insert products that require a large amount of glue and must be clamped with a vertical structure. Because vertical structure is convenient for inserts, horizontal structure has a large amount of glue, it is product that market needs to combine vertical and horizontal structures.

1.1. Check whether parts of machine and electrical control box are in good condition.
1.2. Check oil level of hydraulic oil and whether oil storage is sufficient. Start motor to observe whether oil output from axial plunger valve is normal.
1.3. Open cooling water valve and connect cooling water.

2.1. Mold loading: push shifting mechanism to the highest position, install plastic mold on moving mold plate, unscrew fixed mold plate, correct upper mold and fixed mold plate of plastic mold, tighten screw, and fasten lower mold of plastic mold to moving mold plate , run mold transfer mechanism to check whether mold position is correct.
2.2. Barrel heating: turn on electric heating switch of electrical control box, add plastic into barrel, and fully heat plastic to melt.
2.3. Injection molding operation: turn on solenoid valve 8 to make mold transfer mechanism rise and close plastic mold, and turn on solenoid valve 6 to press injection plunger into barrel for injection molding. After injection is completed, solenoid valve 6 is turned on to push injection plunger out of barrel, solenoid valve 8 is turned on to lower mold shifting mechanism, plastic mold can be opened and demolded.

3.1. Check whether oil storage of hydraulic oil is sufficient. If it is insufficient, it should be replenished in time. Oil used should be kept clean.
3.2. Lubrication point should be lubricated regularly according to regulations, and oil filter should be cleaned regularly. Keep surroundings of machine clean and do not allow dirt to enter fuel tank.
3.3. Dirt on machine should be wiped off after use, and smooth surface should be oiled.
3.4. Regularly check electrical parts, remove dirt, oil and dust, keep electrical contacts clean, often remove dirt and dust on connectors.