A method of sweating to produce waxy materials for 3D printing

Abstract

The invention discloses a method for sweating and producing a wax material for 3D printing. The method comprises the following steps: performing hydro-conversion on an F-T synthetic product; distilling a hydrogenation product to prepare a sweating raw material suitable for a distillation range; and sweating and blending, thereby obtaining the target product. According to the method disclosed by the invention, stable and tiny bubbles are formed in a wax layer in presence of a bubble stabilizer so as to promote rapid discharge of liquid components on the basis of an ordinary sweating process. High temperature and constant temperature stages are increased in the cooling process, and the liquid components are carried out by utilizing airflow through the wax layer in the sweating process, so that a base material which has a melting point of about 70 DEG C and does not contain any low-melting-point component can be produced by the sweating process. The base material is blended and extruded with a toughened resin, a tackifying resin, animal wax and / or vegetable wax, an antioxidant and pigments so as to obtain the wax product for 3D printing. The method disclosed by the invention has the advantages of being low in production equipment investment, simple in production process, low in operating cost, safe, energy-saving, free from solvent pollution and the like.

Description

technical field [0001] The invention belongs to the technical field of special wax production, in particular to a method for producing 3D printing wax materials by sweating. 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 Proto...

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 (reducing the heating rate) 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 the common sweating process produces products with a melting point above 70°C. For wax products, the carbon distribution width and n-alkane content on the wax in the later stage of sweating have nothing to do with the yield, that is, the carbon distribution width on the wax does not decrease with the decrease of yield, and the n-alkane content does not increase with the decrease of yield, so Ordinary sweat separation process is 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