As we know, alumina crucible is known as corundum crucible. Corundum crucible has the characteristics of heat resistance, cold resistance, heat collection and chemical corrosion, but it can not resist corrosion. In fact, the corundum crucible is a cylindrical shape, nearly a barrel. Despite its many advantages, aluminum contained in corundum crucibles can cause Alzheimer's disease. There are many forms of corundum crucible. Today, I'd like to introduce to us what are the forms of corundum crucible?
(1) Dry pressing method.
Because the four stroke of hydraulic transmission press is symmetrical, the low pressure of parts is also different when different granular materials are filled differently. When the particulate matter exceeds 60 μ M, it can move freely in the middle of 60-200 mesh, losing the effect of working pressure. There are two types of press, hydraulic press and punching press, which can be semi-active or fully active forming method. The professional skills of compound porcelain dry pressing forming carbon carbon composite furnace body are only limited to the objects with authentic appearance design, inner cavity thickness exceeding 1mm, and length to diameter ratio not exceeding 4:1. The method of rubber and plastic products is biaxial or double - axial
(2) The working pressure of the powder tablet press is 2 million PA. Moreover, the pressure of the equipment press is changed due to the powder filling amount, which is very easy to increase the difference in the limit after calcination, so as to reflect the quality of the goods. The accuracy of the discharge amount reflects greatly the accuracy of the whole mechanical limit of the sagger. What is the forming method of corundum crucible? Therefore, the powder is evenly dispersed in the whole process of dry pressing, which has a great filling effect on styrofoam. The use value can reach 15 to 50 pieces per second. Corundum crucible
Slurry introduction method.
(3) When the surface wall sucking slurry reaches the specified thickness, the hollow grouting must also pour out the remaining slurry. In order to improve the increase of green body, the thickened and diluted slurry should be applied. Grouting is a method of forming compound porcelain. Generally, tap water is used as the solution material, and then the gelling agent and adhesive of steel jade zirconium corundum sagger are added to fully grind out the organic waste gas, which is then poured into the raw gypsum mold. Due to the selection of raw gypsum mold, the profit is low and it is easy to form large-size and just looking jade crucible with miscellaneous components. The key point of this process is to prepare compound slurry. Due to the absorption of moisture by the sagger gypsum mold capillary, the slurry is dried and fixed in the structure.
The forming method of the above two corundum crucibles is actually a grouting forming method. The cost of this kind of method is relatively low, but the core problem is the preparation of raw materials, so this point should be paid attention to.
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