Extrusion is a metal forming process , in which billet is passed through a die , to get required cross section of component .
Non cutting process
Production of Fixed cross section
Types of extrusion process
Direct extrusion process
Indirect extrusion process
Impact extrusion process
Hydrostatic extrusion process
Tube extrusion process
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[Asia Pump Network News] Concrete pump safe operation rules: 1, pumping equipment should be placed at the edge of the pit to maintain a certain distance. 2, the level of pumping pipe laying lines should be reasonable, pipe and pipe support must be fastened and reliable, pipe joints should be sealed and reliable. 3, It is strictly forbidden to directly attach the vertical pipe to the output port of the pump. The front end of the vertical pipe should be attached with a horizontal pipe of not less than 10m in length and the check valve should be installed near the horizontal pipe of the horizontal pipe. When laying a downward sloping pipe, a horizontal pipe should be installed at the lower end, and the length of the pipe should be at least five times of the height difference of the inclined pipe. Otherwise, pipe bends or the like should be used to increase the resistance. Such as the inclination of larger, if necessary, should be installed at the top of the ramp valve exhaust valve to facilitate the exhaust. 4, gravel diameter, cement label and mix should meet pump pumpability requirements. Pumping, the material hopper should be higher than the height of the suction port to prevent inhalation of air wounding. 5, the wind is greater than six and above, the pump shall not use the cloth rod. The application of hot wet sacks, wet straw bags cover the pipeline. 6, pumping equipment, parking brake and locking brake should be used at the same time, the tire should be wedge tight. Cooling water supply is normal, water tank should be filled with water, hopper should be no debris, the lubrication points should be normal lubrication. 7, pumping equipment, bolts of various departments should be closed, pipe joints should be tightened, protective devices should be complete and reliable. 8, various parts of the control switch, adjust the handle, hand wheel, lever, cock, etc. should be in the correct position. Hydraulic system should be normal without leakage. 9, ready to wash pipe, cleaning supplies, catcher and related devices. Before work, you must first use the cement mortar formulated in accordance with the provisions of the lubrication pipe. Irrelevant people must leave the pipeline. 10. The outriggers shall be fully extended and supported, and shall not be allowed to start the cloth rod before they are supported. The cloth rod can be lifted back from the back of the bracket, the cloth rod should be extended in sequence. It is strictly forbidden to lift or pull objects by cloth rod. 11, when the cloth rod is fully extended state, the movement of the body is strictly prohibited. When the work needs to be moved, the cloth rod on the upper section should be folded and fixed at the speed of no more than 10km / h. The cloth rod shall not be used with pipes exceeding the specified diameter. 12, should be monitoring all kinds of instruments and lights at any time, found that irregularities should be promptly adjusted or dealt with. In case of blockage of the delivery pipe, an anti-pump should be carried out to return the concrete to the hopper, and the pipe should be dismantled if necessary. 13, pumping work should be continuous operation, you must pause every 5 to 10 minutes (winter 3 to 5 minutes) pumping once. If you stop pumping for a longer time, you should pump one or two times, and then pumping material. Pumping hopper should maintain a certain amount of concrete, not suction. 14, should keep the water tank full of clear water, found that water quality is turbid and more sand should be promptly checked. 15, pumping system under pressure should not open any pipeline and hydraulic pipe. Hydraulic system safety valve shall not be arbitrarily adjusted, the accumulator can only be filled with nitrogen. 16, after work, the concrete inside the hopper and the pipe must all be output, then the pump, hopper, pipe flushing. When flushing the pipeline with compressed air, the person shall not stand in front of the outlet of the pipeline within 10m, and collect the punched foam rubber and gravel particles with metal mesh. 17, prohibited the use of compressed air flushing fabric rod piping. Collapsing of fabric rods should be done in order. 18, the piston on both sides of the cleaning chamber, and coated with lubricating oil. 19, various parts of the control switch, adjust the handle, hand wheel, lever, cock, etc. should be reset. Hydraulic system unloading. (Editor: pure) Further reading: 2016 Beijing Petroleum Exhibition pump valve pipe fittings exhibition information 2016 exhibition information