Manufacturing method of ceramic sprue cup for casting
A manufacturing method and pouring cup technology, which are applied in casting equipment, casting molding equipment, casting melt containers, etc., can solve the problems of low production efficiency and high production cost, and achieve improved strength and service life, reduced cost, and reduced running time. The effect of the risk of fire
Active Publication Date: 2015-09-30
KOCEL EQUIP
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Problems solved by technology
Therefore, the commonly used sprue cup is made of resin sand. This kind of sprue cup is disposable, with low production efficiency and high production cost.
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[0008] In the embodiment of the present invention to make as figure 1 The pear-shaped sprue cup shown is taken as an example. In the manufacturing method of the ceramic sprue cup for casting, bauxite and steel wire fibers are used to sinter, and the weight amount of steel wire fibers accounts for 10-20% of the total weight of the material. Soil is ground into 50-70 mesh powder, Al in bauxite 2 o 3 content greater than 70%. The steel wire diameter of the steel wire fiber is φ1-2mm, and the pellets are cut into 30-40mm long; mix the bauxite and the steel wire fiber evenly, then add water with 10-15% of the total weight of the mixture and stir evenly to form a mud, and use the sprue cup mold Make the sprue cup mud mold, then transfer to the sintering furnace, raise the temperature to 1500±30°C at a heating rate of 25-35°C / h, keep it warm for 15-20 days, and then reduce the temperature at a cooling rate of 25-35°C / h The ceramic sprue cup is made at room temperature; the outer p...
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Abstract
The invention relates to the technical field of cast moulding systems, in particular to a manufacturing method of a ceramic sprue cup for casting. The ceramic sprue cup is formed by sintering alumina and steel wire fibers. The weight of the steel wire fibers accounts for 10% to 20% of the total weight of materials, and the alumina is ground into powder of 50 meshes to 70 meshes; the diameter of steel wires of the steel wire fibers is phi 1mm to phi 2mm, and the steel wires are shot into 30 mm to 40 mm; the alumina and the steel wire fibers are mixed evenly, water with the weight accounting for 10% to 15% of the total weight of a mixture is added into the alumina and the steel wire fibers, the alumina and the steel wire fibers are stirred evenly to be in a mud shape, and through a sprue cup mold, a sprue cup clay mold is manufactured; then the mold is converted to a sintering furnace and is heated to 1500DEG C+ / -30 DEG C at the rising speed of 25DEG C / h to 35 DEG C / h, the mold is kept warm for 15 days to 20 days, the temperature of the mold is reduced to the indoor temperature at the cooling speed of 25DEG C / h to 35 DEG C / h, and the ceramic sprue cup is manufactured; and the periphery of the sintered ceramic sprue cup is coated with a layer of iron skin. The ceramic sprue cup manufactured through the method is low in manufacturing cost and long in service life, and repeated use ranging from 40 times to 50 times can be achieved.
Description
technical field [0001] The invention relates to the technical field of casting pouring systems, in particular to a method for manufacturing a ceramic sprue cup for casting. Background technique [0002] In casting, the function of the sprue cup is to receive the molten metal from the ladle. On the one hand, it plays the role of drainage, preventing splashing and overflowing, so as to facilitate pouring; on the other hand, it reduces the direct impact of the molten metal on the mold; Part of the slag and impurities can be skimmed in the sprue cup to prevent them from entering the sprue. Therefore, the commonly used sprue cup is made of resin sand. This sprue cup is disposable, with low production efficiency and high production cost. Contents of the invention [0003] The object of the present invention is to provide a manufacturing method of a ceramic sprue cup for casting that can be used repeatedly, so as to reduce the production cost of the sprue cup and improve the qua...
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IPC IPC(8): B22C9/08B22D41/00
Inventor 程行东王蒙柴润川
Owner KOCEL EQUIP