Dewaxing device and dewaxing method using the dewaxing device

Abstract

The invention discloses a dewaxing unit and a dewaxing method using the dewaxing unit. The dewaxing unit comprises a dewaxing system and a recycling system; the dewaxing system comprises a cleaning device and a storage device communicated with the cleaning device; the storage device comprises a first solvent trough and a second solvent trough, and the first solvent trough and the second solvent trough are communicated with the cleaning device; the first solvent trough and the second solvent trough are provided with heating devices. The recycling system comprises a first recycling device and a second recycling device communicated with the first solvent trough and the second solvent trough respectively. When the first solvent trough is communicated with the cleaning device, the second solvent trough and the cleaning device are closed; when the second solvent trough is communicated with the cleaning device, the first solvent trough and the cleaning device are closed. Therefore, coarse dewaxing is carried out on a product, and then fine dewaxing is carried out so that the product can be thoroughly dewaxed. The soluble wax amount of bromopropane is improved to 16 percent, and then recycling is carried out. The recycling frequency is reduced; the maintenance effect is obviously improved, and the requirement for reducing the cost is met.

Description

technical field [0001] The invention relates to a chemical device and method, in particular to a chemical dewaxing device and a dewaxing method using the dewaxing device. Background technique [0002] The existing metal injection molding technology, taking the wax-based process as an example, the production process is as follows: firstly, the feed material is made, the main component of the feed material is metal powder, and the main binder and filler are also included. The main binder is plastic or its mixture, which can improve the strength of the injection parts and products. The filler is white wax, palm wax, microcrystalline wax, oil, etc., which can increase the fluidity of the plastic; then the material is injected into the injection molding machine; secondly, the filler wax-based material is removed by solvent cleaning or heating, so that An open channel is formed in the injection part; finally, it is sintered at high temperature to remove other backbone binders. D...

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Problems solved by technology

However, the higher the amount of wax dissolved in bromopropane, the worse the dewaxing efficiency is, the degree of dewaxing is unstable, and even the unfavorable situation of wax on the product surface may appear, which will have serious adverse effects on subsequent operations, and the product yield rate will also decrease. Therefore, it has dropped significantly, so it will choose to reduce the wax melting standard and then recycle it. However, the process of heating and cooling has a great impact on the wax melting of bromopropane. The wax saturation at 45 degrees can reach 16%. At room temperature, the wax saturation drops to 3%. Assuming that the existing bromopropane has a wax melting capacity of 2.9%, after a dewaxing process at 45 degrees, the wax melting capacity reaches 3.5%. The maximum amount of wax melted is 3%, and the excess wax amount of 0.5% will become solid wax, and because the surface of the product is extremely large, most of it will be produced on the surface of the product, resulting in the part of the original open channel of the product becoming closed In order to avoid excessive wax residue on the surface of the product, the standard for the amount of wax dissolved in solvent recovery is usually set below 2% to achieve stable production. In the future, the problem of frequent recycling will occur, which will increase the production cost

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