What methods of casting polyurethane casters kay's expert to explain

What methods of casting polyurethane casters kay's experts to explain, casting production is the metal melting, heating the liquid, and then poured into a certain shape of the mold cavity, the external force or gravity pressure, under the action of centrifugal force and electromagnetic force fills the cavity, cooling and solidifying into castor castings ( Or parts) A method of metal forming. Pouring out if there is defect inspection must be separate the defective products, and inform the related department to analysis the reasons of the defects, and in the correct analysis of defects in the next production whether can repair, such as repair welding, etc. Not all products are need to do heat treatment, basically see your product materials, product use in what aspects. Do heat treatment was to eliminate internal stress or increase or decrease the hardness of products, in order to facilitate processing. Some is also the guests have special requirements, all of these are according to the specific situation to analysis. Sand containing the main properties of core sand requires strength, permeability, high refractoriness, rolled, liquidity, ratio of tight and pieces, etc. Sand is composed of the original sand, bonding agent and additive. Foundry sand silt content is less, uniform particles, the shape of the sea sand round and polygonal, river sand and sand mountain. Foundry binder clay ordinary clay and bentonite, sodium silicate sand, resin, fat and vegetable oil, respectively called clay sand, sodium silicate sand, resin sand, sand and fat, and plant oil, etc. In order to further improve some properties of the moulding sand, often want to add some additions in molding sand, such as coal, sawdust, pulp, etc. What methods of casting polyurethane casters kay's experts to explain, more news and information about pu castor please click: hynews / 135. html