Spiral ceramic crystal selector and fabrication process of selector

Abstract

The invention relates to a ceramic spiral crystal selector. The spiral ceramic crystal selector is characterized in that the outer part of the ceramic spiral crystal selector is in a column structure, the inner part of the ceramic spiral crystal selector is provided with a spiral through hole, and the diameter of the structural external contour is 8-15mm; the diameter of an initial segment of an internal space is 3-8mm, and the height of the initial segment of the internal space is 4-10mm; a spiral lead angle of a spiral segment of the internal space is 25-60 degrees, and the spiral diameter of the spiral segment of the internal space is 2-5mm; the diameter of an extending segment of the internal space is 2-5mm, and the height of the extending segment of the internal space is 4-10mm. A fabrication process of the spiral ceramic crystal selector comprises the following steps of firstly pressing a model by utilizing an internal shape fabrication mold group including an upper mold and a lower mold, then putting the model into an external contour forming mold group including a left mold, a right mold, an upper positioning block and a lower positioning block, finishing positioning, pouring ceramic slurry into the external contour forming mold group, taking out the slurry from the external contour forming mold group after the slurry is dried, and carrying out high-temperature roasting on the dry slurry to obtain the final spiral ceramic crystal selector. The spiral ceramic crystal selector and the fabrication process of the selector have the advantages that the fabrication is convenient, the use is easy; as a steel leakage problem caused by the position of the crystal selector is thoroughly solved, the cost of wasted alloys is lowered, and the casting yield is increased.

Description

technical field [0001] The invention relates to the technical field of spiral crystal selectors, in particular to a ceramic spiral crystal selector and a manufacturing process. Background technique [0002] Currently the most commonly used spiral crystal selector for manufacturing single crystals, such as figure 1 As shown, the crystal selector is molded by casting wax, including the initial section, the crystal selection end and the extension section. In the process of combining the wax pattern and paint, the parts are supported by the crystal selector, which can easily cause the crystal selector to break or produce cracks that are not easy to find. In addition, in the process of shell making, the wax mold needs to be rotated, and it will be subjected to a large buoyancy force when immersed in the slurry. The crystal selector cannot bear such a large force and breaks. There are many problems of exposed steel caused by the location of the device. Contents of the inventio...

AI Technical Summary

Problems solved by technology

In the process of combining the wax pattern and paint, the parts are supported by the crystal selector, which can easily cause the crystal selector to break or produce cracks that are not easy to find

In addition, in the process of shell making, the wax mold needs to be rotated, and it will be subjected to a large buoyancy force when immersed in the slurry. The crystal selector cannot bear such a large force and breaks. There are many problems of exposed steel caused by the position of the device

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