Use shell core machine: 1. for the manufacture of sand casting equipment. [1] Its main functions are: filling sand, loose sand to fill sand box; tight sand, so sand loose sand box in different ways real shock shock pressure ﹑ ﹑ ﹑ compaction pressure and other tight shot so that sand has the necessary strength in handling and casting and other processes; from the model, using different agencies will look removed from the sand after the compaction. Molding machines first appeared in the mid-19th century, the early molding machine is a simple manual compaction with die cutting mechanism, then use compressed air power as a real shock and compacted sand. 1890 appeared Shock molding machine, so that the shape of the efficiency and accuracy have improved sand. Its tight sand molding machine methods can be divided into shock compression type ﹑ ﹑ real shock compaction style. 2. The shock compression molding machine to shake real compacted sand again, you can get up and down the sand compaction unit. Commonly used microseismic compaction molding machine (see Figure microseismic compaction molding machine), use Workbench whereabouts iron collided with the floating shock microseismic tight sand, and then compacted. Microseismic vibration is higher frequencies (500 to 1000 times / min) and vibration amplitude (5-25 mm) instead of the low frequency shock molding machine (60 to 120 beats / min) ﹑ large amplitude. This molding machine create a good quality of sand, on the basis of the requirements are relatively low. 3. The real shock molding machine molding machine of this type can be divided into shock and microseismic molding machine two kinds. Sand box and look fixed on the table of the molding machine, use the anvil striking surface workbench whereabouts collided ﹑ inertia of sand compaction sand. This molding machine noise is serious, firmness had made the upper part of the low sand, has been replaced by microseismic compression molding machine. The high-pressure molding machine ram into flat indenter ﹑ shaping head and several forms of multi-class structure of the contact pressure. Among the high-pressure molding machine more than the most widely used contacts. Multi-contact high-pressure molding machine head up and down movement is divided into many small squares ── contacts, get a lot of press strength by a hydraulic cylinder. Compacted, the contacts following their appearance height is applied (ie pressurized sand thickness) of the corresponding pressure on the sand to get a high ﹑ uniform firmness and hardness. Such molding machines are equipped with micro-local earthquake hit agencies that can adapt to the complex pattern of shapes. Multi-contact high-pressure molding machine uses four-column structure, a single-station type and duplex style. In order to adapt to the small batch production of castings, this model machine with template changer, replace the template, shape does not have to stop. High pressure more contact modeling, sand casting can be poured out of thin wall ﹑ accurate dimensions, surfaces and smooth casting. 5 .. Modern been some low noise, low dust, low power, high precision shape molding machine, vacuum molding machine, static pressure molding machine, gas impact molding machines. Gas impact molding machines use compressed gas rapid release of energy creates a momentary pressure, shock flask loosely compacted sand to sand, sand compaction and high and uniform. This molding machine low noise, low energy consumption. http://www.jgmoju.com http://www.hbjixinjx.com