At present, all electric injection molding machines use servo motors to realize mold opening and closing, ejection and demoulding, and injection and storage of raw materials. Etc., the operation speed is fast and the precision is high, which greatly improves or enhances the production environment and production efficiency. However, at present, the servo electric injection molding machine only has machines with clamping force below 850 tons.
Injection molding machine
5 HMOLING high-speed injection molding machine is also called high-speed injection molding machine or high-speed injection molding machine. It is the main molding equipment to make thermoplastic or thermosetting materials into various shapes of plastic products by using plastic molding dies. 5h molding high-speed injection molding machine can heat the plastic, apply high pressure to the molten plastic, and make it eject to fill the mold cavity.
I. Classification of injection molding machines:
Because there are many structures and types of injection molding products, there are also many kinds of injection molding machines for molding injection molding products. Dekuma classifies injection molding machines as follows:
1. Classified by plasticization and injection methods of raw materials.
2. According to the different shapes and structures of injection molding machines.
3. According to the processing capacity of injection molding machine.
4. According to the special purpose of the injection machine.
According to the plasticization and injection methods of raw materials, injection molding machines can be divided into three types: (1) plunger type, (2) reciprocating screw type and (3) screw plasticizing plunger type injection type.
According to the different shapes and structures of injection molding machines, they can be divided into (1) vertical injection molding machine, (2) horizontal injection molding machines, (3) angle injection molding machines, (4) multi-mode injection molding machines and (5) combined injection molding machines.
Injection molding machines can be divided into (1) ultra-small injection molding machines, (2) small injection molding machines, (3) medium injection molding machines, (4) large injection molding machines and (5) super-large injection molding machines.
According to the use of the injection machine, it can be divided into (1) ordinary injection machine, (2) exhaust injection machine, (3) high-speed precision injection machine, (4) plastic shoe injection machine, (5) single-mode injection machine with three injection heads, and (6) injection machine with two injection heads and two die positions.
Comprehensive performance parameters of DKM injection molding machine:
The reasonable economic index for designing and manufacturing injection molding machines is to examine their comprehensive performance parameters, which exceed the requirements of qualified injection molding, namely, the number of injection time-space cycles, total power consumption, total equipment quality and total equipment size.
Idle cycle time consists of switching time other than production action time, such as closing the mold, moving the injection seat back and forth, opening the mold to plasticize, injecting, maintaining pressure, cooling, and taking out the product. The first cycle of completing the product is useless time.
Idle cycle time is also an index to measure the production capacity of injection molding machine, which reflects the working quality of mechanical structure quality, action sensitivity, hydraulic system and electrical performance parameters of injection molding machine.
5 HMOLING high-speed injection molding machine is also called high-speed injection molding machine or high-speed injection molding machine. It is the main molding equipment to make thermoplastic or thermosetting materials into various shapes of plastic products by using plastic molding dies. 5Hmolding high-speed injection molding machine consists of injection system, clamping system, hydraulic transmission system, electrical control system, lubrication system, heating and cooling system and safety monitoring system.
The traditional high-speed injection molding machine takes the injection speed as the goal and the accumulator as the injection power source, which provides explosive energy for the high-speed/high-pressure injection of the injection molding machine to achieve the purpose of high-speed injection molding. The 5HMolding high-speed injection molding machine developed and designed by SINO Holding Group is a full-speed injection molding machine based on high-speed injection molding, which adopts two sets of servo hydraulic systems, supplies oil and moves independently at the same time, and realizes two or even three-axis linkage.
In order to meet people's large demand for injection molding products and meet the market supply, engineers and technicians in DKM plastic industry make continuous efforts to make the production of injection molding products faster and more automated. The following measures have improved the injection molding machine and sublimated the quality.
1. Increase the cycle times per unit time of injection molding machine: by increasing the screw speed of plasticized materials, the injection speed of molten materials is accelerated, thus shortening the production cycle of single product injection molding, thus achieving the effect of increasing the cycle times.
2. The injection machine is equipped with two injection cylinders. The preformed screw can feed the two injection cylinders in turn to realize continuous injection.
3. Double-set mold injection molding. When working, the two sets of molds rotate and transpose, so that melt injection, cooling and mold opening can be carried out at two stations at the same time, which shortens the waiting time of preforming downtime and nearly doubles the productivity of injection molding machines.
4. Automation: In the process of injection molding production, the computer is used to control raw material conveying, charging of the barrel, process temperature control, mold opening and parts taking out.
5. In order to make injection-molded products work in various special environments, it is required to produce plastic products with different properties that can adapt to various working environments. Plastic products with different properties have different injection molding process conditions, which promotes the development of injection molding machines to special types. Such as thermosetting plastic injection molding machines with good electrical properties, physical properties and heat resistance, which are not easy to deform, multi-color and multi-material composite molding multi-color injection molding machines, exhaust injection molding machines, fiber reinforced plastic injection molding machines, low foaming injection molding machines, injection blow molding machines designed to improve product quality, etc.
6. In terms of injection molding technology, some have adopted flow injection molding, injection compression molding, sandwich injection molding, reaction injection molding and gas-assisted injection molding.
Significance of research and development of five-die high-speed injection molding machine
In the cost of plastic products, the cost mainly consists of two parts:
1. Raw material cost. It is the most direct and effective way to obtain greater profits, save raw materials and reduce the scrap rate of products; 2. Production cost. It is an effective way to save production cost, save electricity and shorten injection cycle within the time of producing the same product.
In a word, in order to obtain greater profits, saving raw materials (reducing the wall thickness of plastic products-thin-walled products) and improving the yield are the simplest and quickest methods. Secondly, energy saving (electricity saving) and high efficiency (shortening injection cycle) are all good ways to increase profits, which is also the purpose of developing high-speed injection molding machines.
Advantages of 5HMolding high-speed injection molding machine;
1. Hydraulic system-high efficiency and energy saving
5HMolding high-speed injection molding machine adopts servo energy-saving hydraulic system, and servo motor is equipped with quantitative pump. The start/stop/speed of the servo motor can be adjusted at will to drive the oil pump to rotate, and the discharge capacity and speed of the oil pump can be controlled, and the speed and position of the injection molding machine can be directly controlled according to the actual speed of each action. It can be understood that the speed and position of each action of the injection molding machine are directly controlled by the servo energy-saving hydraulic system.
The universal hydraulic system is equipped with a universal motor and a quantitative pump. Ordinary motor speed can not be adjusted, so it is difficult to start and stop. Once the injection molding machine starts running, the common motor drives the oil pump to run at a uniform speed, and the rotation speed will not change. When the oil pump and the common motor run together, the oil discharged by the oil pump is constant, and so is the oil discharged by the oil pump. The speed of each action of the injection molding machine is fast or slow. Most actions only use part of the oil discharged by the oil pump, and the excess oil flows back to the oil tank. This extra oil is useless work done by the oil pump and does not exist in the servo hydraulic energy-saving system. The servo energy-saving hydraulic system spits out as much oil as it needs, which is why the servo energy-saving hydraulic system saves energy.
There is another important point. The wall thickness of the produced product requires a long cooling time. During this cooling time, the injection molding machine does not operate temporarily, and there is no need for the oil pump to spit out oil. The common hydraulic system has been running, and all the oil from the oil pump flows back to the oil tank, and all the consumed electric energy is useless. The servo energy-saving hydraulic system stops rotating during this cooling period and will not consume electric energy, which is the most energy-saving highlight of the servo energy-saving hydraulic system. The longer the product cooling time, the more prominent the energy-saving advantage.
In addition, the servo energy-saving hydraulic system only spits out oil according to the stroke of each action of the injection molding machine, and the flow of hydraulic oil is small, while the displacement of the oil pump in the ordinary hydraulic system is constant, which will cause unnecessary flow loss (easy to raise the oil temperature and accelerate the aging of hydraulic oil and oil seal, etc.). ) and mechanical wear (oil pump wear, etc. ).
2. Hydraulic system-high efficiency
The 5h molding high-speed injection molding machine adopts two groups of servo hydraulic systems, and the oil supply moves independently at the same time, which can realize the simultaneous movement of two axes (simultaneous mold opening/demoulding), and can also add a new power source according to the actual needs of the system to realize the three-axis linkage (simultaneous action of material storage/mold opening/demoulding), which greatly shortens the injection cycle.
3. Electronic control part-high precision
Precision aerospace Moog servo valve and high-order Barker electronic control, with single-cylinder injection system, accurate injection position and high product repeatability.
4. Clamping system-high rigidity
Through finite element analysis, the clamping system of 5HMolding high-speed injection molding machine shows that the deformation of the mold plate is small, the connecting rod is designed with a large angle, its fulcrum is close to the center, and the clamping force is transferred to the center of the mold plate, which realizes the uniform distribution of clamping force, maintains the mold accuracy and ensures the high-speed movement of clamping.
5. Injection system-high response
5HMolding high-speed injection molding machine adopts accumulator as injection power source, cooperates with sensor Moog servo valve and low inertia injection mechanism, and the injection response is stable for 30 ms.
6. Injection system-high plasticization
5HMolding high-speed injection molding machine screw length-diameter ratio L/D=24~26, and adopts double thread+mixing, so that the plastic is mixed evenly.
7. High security
5HMolding high-speed injection molding machine provides triple protection of fully enclosed sheet metal, machinery, oil circuit and electricity.
Operation mode of 5HMolding high-speed machine;
Ordinary high-speed machines can only achieve a single action:
Die closing-injection molding-material storage-mold opening-ejection-reset-die closing.
The action flow of 5HMolding high-speed machine with multi-loop can realize two-axis or even three-axis linkage:
take care of
Mold closing-injection molding-mold opening-reset-mold closing.
detrusion
Application of 5h mould pressing high-speed machine tool;
1.PP, PE and PS all kinds of thin-walled products, such as disposable lunch boxes, aviation cups and IML boxes.
2. High-yield products, such as syringes.
3. Precision industrial parts, etc.
Daily maintenance of DKM injection molding machine;
Check before use:
1. Check the fuel quantity in the fuel tank. Make sure it is within the fuel quantity standard.
2. Check the indoor heat and oil temperature. Oil should be preheated at low temperature indoors. When the indoor temperature is high, it should be cooled down.
3. Check whether the pressure gauge swings seriously, whether it can return to zero and the mileage.
4. Check the temperature control system.
In-service inspection:
When 1. is started, the relief valve is adjusted to the minimum pressure.
2. Check and adjust the regulating pressure of the overflow valve, whether its lifting is continuous and even, and then adjust it to the set pressure after everything is normal.
3. Check the oil pump, oil shell and electromagnet. The oil temperature is 20 -50 degrees, and the pump shell temperature is higher than room temperature 10 -30 degrees.
4. Check the oil leakage.
5. Noise and vibration inspection.
6. Check the pressure gauge.
7. Check the working condition of electrical components and the reliability of safety devices.
8. Whether the fastening nuts and screws of each engine column/cylinder element are loose.
Inspection after shutdown:
1. Check the fuel tank oil level.
2. Check the hydraulic components.
3. The handle position of each valve shall be restored to the positions of "pressure relief", "stop" and "retreat".
4. Check whether the control switch button and electrical components are loose and sensitive.
5. Add lubricating oil to the movable part of the movable joint between the engine column and the oil-filled bearing.
6. Turn off the power and do a good job of safety.
Solution to the problem of locking of injection molding machine;
1. Check the travel switch in front of the safety door and repair it.
2. Check the 24V5A power supply in the electric box and replace the safe and power box.
3. Check whether the valve core is stuck and clean the valve core.
4. Check whether the I/O board has output and whether the solenoid valve is charged.
5. Check whether the hydraulic safety switch is pressed and whether the mechanical lock lever baffle is opened.