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Foundry - casting known

  • Author:naky
  • Source:www.diecastingpartsupplier.com
  • Release on:2015-08-05
When the "sand casting" at first halves on the plate, put sand box fill sand compaction Calibrating finished lower mold making, will make a good sand rotated 180 degrees, put the halves, sprinkle parting agent, put the sand box, and fill sand compaction, evenness, the sandbox will be rotated 180 degrees, respectively remove the upper and lower halves, and then rotated 180 degrees on the type and the lower Hao, sand being completed, wait for pouring. This process known as - "foundry"

Moulding the molten metal is poured into the mold cavity, after cooling and solidification of the product obtained by the production method. In the automobile manufacturing process, using a lot of rough-cast iron parts, accounting for about 60% of the total weight of the vehicle, such as cylinder block, transmission box, steering gear housing, rear axle housing, brake drums, all kinds of support Wait. Manufacturing iron castings usually sand. Sand to sand-based materials, and mixed with a binder and water together. Sand material must have a certain degree of adhesive strength, so as to be molded into a desired shape and can withstand the high temperature molten iron erosion without collapse. In order to make consistent with casting sand molded within the shape of the cavity, the model must be made of wood, called wood molding. After the red-hot molten iron cooling volume will be reduced, and therefore, the size of the wood mold casting needs on the basis of the original size of the press shrinkage increases, cutting the surface of the corresponding need to thicken.

Hollow castings made of sand core needs and corresponding core wood mold (core box). With wooden mold, you can turn sand molding space. In the manufacture of sand, sand box and down to consider how to separate the wood form is removed, but also consider the inflow of hot metal from somewhere, how to fill the cavity in order to obtain high-quality castings. After the sand is made, it can pouring molten iron is poured into the sand mold cavity. Pouring molten iron temperature 1250-1350 degrees, the temperature higher smelting. Then go through grit removal, repair, grinding and other processes before they can become a qualified casting.