Filling powder medium and forming technology of pipe connector fitting

Abstract

The invention provides a filling powder medium and a forming technology of a pipe connector fitting. The filling powder medium is formed by sodium nitrate powder and sodium sulfate powder in the mode that the sodium nitrate powder and the sodium sulfate powder are mixed at the temperature of 310 DEG C, and the mass ratio of the sodium nitrate powder to sodium sulfate powder ranges from 1:5 to 1:50. The forming technology comprises the steps that (1) the filling powder medium is heated to melt until sodium nitrate melts, and the sodium nitrate powder melts and is mixed with the sodium sulfate powder; (2) the filling powder medium is poured into an inner cavity of an original pipe connector fitting, and extrusion forming is conducted on the pipe connector fitting after the filling powder medium is cooled down and solidifies; (3) the extruded pipe connector fitting melts again, and then material return treatment is conducted; (4) pouring forming is conducted on the pipe connector fitting which is processed through material return; (5) the obtained formed product is cleaned; and (6) after a filling material is cleaned, the product is detected and packaged. According to the filling powder medium and the forming technology of the pipe connector fitting, the inner wall of the formed product is smooth, the product can be directly washed with water and can be clean when material return is conducted, and no volatile gas or harmful gas of the product escapes. Industrial large-scale production of the filling powder medium can be easily achieved, and the production cost can be effectively reduced.

Description

technical field [0001] The invention relates to a pipeline manufacturing technology, in particular to a filling powder medium and a forming process of a pipeline through piece. Background technique [0002] In order to ensure good sealing performance and compression resistance of pipe fittings, current tee pipe fittings are generally processed by extrusion molding. [0003] Extrusion is based on the principle of metal plastic deformation, using the mold installed on the press, under the action of a considerable extrusion force, the metal is plastically deformed in the mold cavity, so that the pipe fittings become the required shape, size and The process of parts with certain performance. In the prior art, lead filling extrusion, oil injection extrusion, water injection extrusion and powder injection extrusion are mainly used, among which oil injection or water injection extrusion are not widely used in the market due to factors such as technical difficulty and high equipmen...

AI Technical Summary

Problems solved by technology

The use of this kind of filling medium results in rough inner walls, relatively large mechanical investment, low work efficiency, relatively slow speed, relatively low yield, performance is related to weather, and the pass rate is generally about 70%. It also requires a professional independent drying room, and the material cannot be used. Recycling, the urea in the above materials will decompose and produce irritating gas

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