Method and device for purifying hot melt material

Abstract

The invention discloses a hot melting material purification method and device. The hot melting material purification device comprises a base, wherein a uniform temperature box is fixedly installed on the front portion of the base, a centrifugal device is installed on one side of the uniform temperature box, the uniform temperature box is connected with a material preparation pump through one heat preservation conveying pipe, is connected with a feeding pump through a second heat preservation conveying pipe, and is connected with a control valve through a third heat preservation conveying pipe, the three heat preservation conveying pipes are connected with a hot oil circulation system at the same time, the feeding pump is connected with a rotary barrel of the centrifugal device through a pipe, a spiral pusher is installed in the rotary barrel, a residual material outlet is formed in the tail end of the spiral pusher, a purified material outlet is formed in the bottom of the rotary barrel, the purified material outlet is connected with a material outlet pump through a pipe, the control valve is composed of a first control valve body and a second control valve body which are connected in series, and the material outlet pump is arranged between the first control valve body and the second control valve body in a connected manner. The hot melting material purification device further comprises a hot gas circulation system, the hot oil circulation system and a refrigeration unit. Sheet metal cover plates are arranged on all the side faces and the top of the whole device in a covering manner. By adopting the whole set of system, clean materials different in purity can be obtained quickly and conveniently, the working efficiency is high, and the cost is low.

Description

technical field [0001] The invention relates to the technical field of investment casting technology, especially a method for quickly and accurately removing water, ash (high-temperature burning residues including inorganic salt minerals, etc.), oxides, carbonization, etc. A method for purifying impurities such as substances, and a special device for the method. Background technique [0002] Investment casting requires the use of model wax, which is injected into the mold in a hot melt state, and then cooled and solidified into a model. [0003] After multiple layers of refractory coatings have been applied to the surface of the model and dried, the model is heated (using a water bath, steam, electric radiation, gas flash, microwave, etc.) to melt the wax to form a cavity formwork (term dewaxing). [0004] So far, the model wax has completed a working mission. [0005] The purity of the wax will seriously affect the production rate of the model and the quality of the casti...

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Problems solved by technology

[0007] One is to use brand-new wax directly (the wax supplier prepares according to requirements), and it will be discarded after dewaxing after one use, and the casting enterprise bears higher wax cost

[0008] Second, after dewaxing, use high-temperature evaporation to remove water, long-term standing, etc. for simple treatment, and recycle for more than two times of recycling, which relatively saves the cost of wax materials. However, due to simple treatment methods, the purity of wax materials continues to decrease, and the ash content Increase, the wax material is subject to long-term high-temperature deterioration, oxidation, and carbonization. At the same time, due to the need for long-term heat preservation and heating, more heat-insulation storage tanks are invested, resulting in high energy consumption.

[0010] In addition, vacuum technology and high-density filter bags are used to shorten the water removal time and filter some large particles of impurities, which has a certain effect, but the fine particles of ash, oxides, and carbides in the wax cannot be removed efficiently and accurately, and the vacuum device is easy to remove. The heated molten wax volatilizes and condenses small particles and water vapor pollution, and the filter bag is easily blocked or damaged and needs to be replaced frequently

[0011] In addition, some large particles of impurities are filtered by installing a filter bag in the centrifuge bucket. It is also impossible to efficiently and accurately remove the water in the wax and fine particles of ash, oxides, carbides and other impurities. The filter bag is easy to be blocked or damaged and needs frequent cleaning. replace

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