News

  • White die deformation caused by drying and solutions

    When the white mold is dried, the placement is unreasonable. If the code layer is too high, it will cause deformation. The drying time of the white mold is not suitable, which causes the linear shrinkage of the white mold to be insufficient or excessive . The size of the blank after pouring does ...
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  • Causes and solutions of casting blank deformation in lost foam casting

    Forming process caused by white film deformation and solutions When the white film is taken from the mold after molding, due to the complexity of certain geometric shapes, physical drawing and deformation will occur due to the effects of air pressure and water pressure when the mold is taken, and...
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  • Development and characteristics of ductile iron

    Ductile Iron Development : Cast iron was only developed by the French in 1722. At that time, white heart malleable cast iron was developed, and later, such as black heart malleable cast iron. Until 1947, an Englishman discovered that there was nodular graphite in a cast iron. In fact, this was a...
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  • lost foam casting Causes and solutions for the formation of stomata

    Stomata Reasons for formation: 1. The gas involved in the casting of the liquid metal exists in the casting in the form of pores after the alloy liquid solidifies 2. Subcutaneous pores formed under the skin of the casting after the metal reacts with the mold 3. The slag contained in the alloy liq...
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  • Process measures for controlling blowhole defects in lost foam casting

    1. Select the appropriate model material. Copolymer foam is used as the model material. Because the copolymer is decomposed by zipper type, the degree of one-time gasification is high, the proportion of liquid phase is small, and small molecule gas is easy to overflow from the coating. The densit...
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  • Causes of air holes in lost foam casting

    1. A large amount of gas and residues generated by the gasification and decomposition of the foam model cannot be discharged out of the mold in time. The dryness of the foam and paint layer filled with dry sand is poor. Surrounded by the high temperature of the liquid alloy, a large amount of hyd...
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  • Main advantages of lost foam process over sand mold casting process:

    1. Wide production range: Lost foam casting does not require parting and lower core, so it is especially suitable for box, shell and bobbin castings with complex geometric shapes that are difficult to complete by traditional casting. 2. High precision and shape standard: it can achieve high dimen...
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  • Casting process of nodular cast iron products for lost foam casting, precautions for ductile iron casting

    1. First, the temperature in the furnace is raised to 1650-1680 degrees to ensure carbon silicon. 2. Weigh the alloy into the casting ladle, and then add the amount of ferrosilicon to cover the layer at 30 / 40mm. 3.First pour a third of the original molten iron,After the reaction was completed, ...
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  • Ductile casting manufacturer’s casting operation rules

    1) Check whether the furnace body, furnace door, trailer, wire rope pulley, blower and other equipment are normal before work, and whether there are unsafe factors such as collapse, breakage, cracking, etc. If there is, it should be properly handled before the furnace can be opened. When using an...
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  • Advantages of wear-resistant castings produced by the lost foam casting process

    (1)The surface quality of the casting is good, the dimensional accuracy of the casting is high, the surface has few casting defects, and the surface is smooth, which is conducive to improving the wear resistance of the casting; (2) High-manganese steel series materials and alloy steel series wear...
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  • What is the manufacturer of casting lost foam casting

    “A casting is a metal forming object obtained by various casting methods, that is, an object of a certain shape, size and performance obtained by pouring, injection, inhalation or other casting methods of molten liquid metal into a pre-prepared mold, cooling it, then polishing it and other ...
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  • Lost foam casting technology

    Lost foam casting technology is also called “dry sand mold casting” or “negative pressure type solid casting”, refers to the casting dimension shape similar to that of foam plastic model binding synthesis model cluster, brush after refractory coating and drying, buried in ...
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