1、The use of molding machine
1.1 shock and compression molding machine: the sand mold and then compaction, you can get the upper and lower compact sand mold. Commonly used is the micro-vibration compaction molding machine, the use of table drop and floating shock iron collision, micro-vibration compacted sand, and then compacted. Micro-vibration is a higher frequency (500 ~ 1000 times / min), small amplitude (5 ~ 25 mm) of vibration instead of low frequency (60 ~ 120 times / min), large amplitude of vibration of the shock molding machine. This type of molding machine to create a good quality sand, the foundation requirements are also lower.
1.2 Vibration type molding machine: This type of molding machine can be divided into two types: vibration type and micro-vibration type molding machine. Sand box and mold sample fixed in the molding machine table, the use of table fall and anvil impact surface collision, sand inertia to tighten the sand model. This kind of molding machine noise is serious, the upper part of the manufactured sand compacting degree is very low, has been replaced by micro-vibration compaction molding machine.
1.3 The press head of high-pressure molding machine is divided into several structural forms such as flat press head, forming press head and multi-contact press head. Among them, high-pressure multi-contact molding machine is the most widely used. High-pressure multi-contact molding machine press head is divided into many small squares that can move up and down - contact, through the hydraulic cylinder can obtain a large amount of pressure. During compaction, each contact exerts a corresponding pressure according to the height of the mould pattern below it (i.e. the thickness of the sand layer under pressure), so that the sand mould obtains a high and uniform compactness and hardness. These moulding machines are equipped with a micro-vibration mechanism, which can be adapted to the moulding of complex mould patterns. High-pressure multi-contact moulding machines are mostly of four-column structure, single-station and double-station type. In order to adapt to the production of small and medium batches of castings, this type of molding machine is equipped with a quick-change template device, so that the molding machine does not have to stop when replacing the template. The use of high-pressure multi-contact molding, sand casting can pour out thin-walled, accurate size, surface finish of the casting.
1.4 modern has emerged some low noise, low dust, low energy consumption, high precision molding machine, such as vacuum molding machine, static pressure molding machine, gas impact molding machine. Gas impact molding machine using compressed gas quickly released energy to produce instantaneous pressure, impact sand box in the loose sand to tighten the sand, sand tightness is high and uniform. This molding machine noise is low, energy consumption is also low.
2、The structure of molding machine
The moulding machine is composed of the body, mould starting mechanism, shock compacting mechanism, rotating arm pressure head part and pneumatic piping system.
2.1 The body is a solid hollow frame workpiece, the upper part of the support arm pressure head part, the compaction of the arm hooked body so that the pressure force by the body to bear, the body and the shock mechanism bolted together, the arm pressure head part, the pressure head fixed in the swing arm can be turned, the pressure head has a screw lift according to the height of the sand box to adjust to the pressure head to the sand box distance
2.2 The rotating arm is controlled by a hand-pull valve to control the piston of the cylinder to move back and forth to realize the positive arm and rotating arm movement.
2.3 The mould starting structure is composed of two mould starting cylinders, connecting rod, balancing shaft, mould starting table and mould starting rod, etc. When the mould starting cylinder starts, it drives the connecting rod, balancing shaft and mould starting table to make the four top rods lift the sand box and start the mould at the same time.
2.4 Shock compaction structure. Adopt spring micro-vibration pneumatic compaction structure, compaction shock to increase the vibration. The clamping cylinder locks the compaction cylinder when the mold is started, and the clamping cylinder is released when the mold is dropped.
2.5 Pneumatic piping system: the input compressed air, through the air filter to remove the water and impurities in the compressed air, and then through the oil mist injected lubricant, supply each pneumatic components and institutions, machine action by the hand-pull valve console to achieve.
2.6 Air supply and lubrication. The machine is by the air source for energy and oil to do lubrication to achieve the work. The size of the inlet pressure and the size of the oil volume are regulated by the pressure reducing valve and oil regulating valve respectively. The air source through the oil fogger according to the principle of siphon will be sucked into the pipeline, mist into the pipeline system for lubrication.
3、the classification of molding machine.
3.1 Compaction type molding machine
The use of air pressure or hydraulic pressure through the indenter or mold sample on the sand in the sand box to tighten the sand. Its pressure is generally 0.25 ~ 0.4 MPa. This kind of molding machine, so that away from the pressure surface of the sand compacting degree is poor.
3.2 High-pressure molding machine, the pressure on the sand plane is 0.7 MPa or more. The press head of the high-pressure molding machine is divided into several structures such as flat press head, forming press head and multi-contact press head. The most widely used is the high pressure multi-contact moulding machine. The press head of high pressure multi-contact molding machine is divided into many small squares that can move up and down - the contacts, through the hydraulic cylinder can obtain a large amount of pressure. During compaction, each contact exerts the corresponding pressure according to the height of the mould pattern below it (i.e. the thickness of the sand layer under pressure), so that the sand mould obtains a high and uniform compactness and hardness. These moulding machines are equipped with a micro-vibration mechanism, which can be adapted to the moulding of complex mould patterns. High-pressure multi-contact moulding machines are mostly of four-column structure, single-station and double-station type. In order to adapt to the production of small and medium batches of castings, this type of molding machine is equipped with a quick-change template device, so that the molding machine does not have to stop when replacing the template. The use of high-pressure multi-contact molding, sand casting can pour out thin-walled, accurate size, surface finish castings.
3.3 vibration solid molding machine
This type of molding machine can be divided into two types of vibration and micro-vibration molding machine. Sand box and mold sample fixed in the molding machine table, the use of table fall and anvil impact surface collision, the inertia of the sand to tighten the sand model. This kind of molding machine has serious noise, and the compactness of the upper part of the sand mold is very low, which has been replaced by the micro-vibration compacting molding machine.
3.4 Vibratory compaction molding machine
Compaction is carried out again on the sand molded by vibration, and a compact sand mold can be obtained from the upper and lower parts. Commonly used is the micro-vibration compaction molding machine (see figure), the use of table fall and floating vibration iron collision, micro-vibration compact sand, and then compaction. Micro-vibration is a higher frequency (500 ~ 1000 times / min), small amplitude (5 ~ 25 mm) of vibration instead of low frequency (60 ~ 120 times / min), large amplitude of vibration of the shock molding machine. This type of molding machine produces good quality sand and requires less foundation. Molding machine
3.5 Injection molding machine
It uses compressed air to shoot sand evenly into the sand box for pre-firming, and then apply pressure for compaction. Commonly used are vertical parting boxless injection molding machine and horizontal parting off box injection molding machine. The sand is directly injected into the molding chamber with a template. The size of the molded sand is highly accurate, and the productivity is high because there are cavities on both sides of the sand box. The horizontal parting off box injection molding machine uses the sand box for molding, the sand model is made after closing the model off box, the core is more convenient and the productivity is high.
Qingdao Sanzhuji Equipment Manufacturing Co., Ltd. specializes in the production of sand reclamation equipment,foundry machines,Sand casting equipment,GS high efficiency rotary mixer,no-bake resin sand mixer,Jolt squeeze molding machine/Jolt-squeezing moulding machines,Multi- Piston Moulding Machine/Hydraulic multi-piston moulding machine,foundry molding machine,flaskless moulding machine,shot blasting machine,dust collector,according to the amount of old sand recovered Carry out plan customization, and provide sand reclamation equipment installation, commissioning, and training. Welcome guests to visit the factory.
