Method for preparing 3D printing wax

Abstract

The invention discloses a method for preparing 3D printing wax. The method comprises carrying out hydro-conversion on an F-T synthesis product, carrying out distillation on the hydrogenation product to obtain a sweating raw material for a distillation range and carrying out emulsification, sweating and blending to obtain a desired product. Based on the ordinary sweating method, the constant high temperature stage is used in the cooling process and airflows pass through a wax layer and carry away a liquid component in the sweating process so that the separation effects on a solid component and the liquid component is improved and a separation rate is accelerated, and preferably, the sweating raw material and a water solution, which can be decomposed into gas, are emulsified so that the liquid component can be fast discharged and the base material having a melting point of about 70 DEG C can be prepared through the sweating method. After blending of the base material, toughened resin, tackifying resin, animal wax and / or plant wax, an antioxidant and a pigment and extrusion filamentation, the desired product is obtained. The method has the advantages of low equipment investment, simple production process, low operation cost, safety, energy saving and no solvent pollution.

Description

technical field [0001] The invention belongs to the technical field of special wax production, in particular to a preparation method of wax for 3D printing. Background technique [0002] Precision casting is a general term for precise casting processes obtained by precise molding methods, among which investment casting, also known as lost wax casting, is more commonly used. The products obtained by investment casting are precise and complex, close to the final shape of the parts, and can be used directly without or with little processing. It is an advanced technology near net shape and an excellent technology in the foundry industry. Its application very broad. However, the process of investment casting is complicated, mainly including processes such as wax pressing, wax repairing, tree formation, dipping, melting wax, casting molten metal, and post-processing. The wax molds are basically manufactured manually, which takes a long time. [0003] Rapid Prototyping (RP) techn...

AI Technical Summary

Problems solved by technology

When the ordinary sweating process produces soap wax and low melting point paraffin wax at 40°C to 60°C, the solid component (wax with a higher melting point) and the liquid component (wax with a lower melting point) in the sweating process are two types of components. They are in two phases of solid and liquid respectively, but it is difficult to completely separate them

In order to make the final product meet the requirements, the method of prolonging the sweating time and increasing the sweating termination temperature is usually adopted, but this will lead to a long production cycle and a decrease in product yield; tests have shown that when the ordinary sweating process produces wax products with a melting point above 70°C, sweating The width of carbon distribution on the wax and the content of n-alkanes in the later stage have nothing to do with the yield, that is, the width of carbon distribution on the wax does not decrease with the decrease of yield, and the content of n-alkanes does not increase with the decrease of yield, so the common sweating separation process does not Suitable for the production of wax products with a melting point of about 70°C

[0019] Compared with solvent separation, the sweating separation process is intermittent operation, and the product yield is lower and the production cycle is longer, but the sweating separation process has the advantages of less investment, simple production process, low operating cost, safe production process, energy saving and no environmental impact. Pollution and other advantages, some manufacturers are still using this method to produce soap wax products

[0020] Over the years, the sweating method has been developed in terms of production equipment and technology, such as CN89214332 (vertical square multi-section sweating tank), CN94223980.6 (dish-type sweating device), CN98233254.8 (paraffin sweating tank), CN200920033500. X (new paraffin sweating tank), CN201210508905.0 (a high-efficiency paraffin sweating device), CN201320127680.4 (tubular paraffin deoiling device), etc., have made improvements in sweating production equipment; CN91206202 (a high-efficiency paraffin sweating tank ) have made improvements in the sweating process, but these methods still cannot produce wax products with a melting point of about 70°C