Nonmetal filling medium for producing piping branch junctions and technique for squeezing the piping branch junctions

Abstract

The invention relates to a non-metal filling medium used for fabricating a three-way pipeline and a process for extruding the three-way pipeline. The filling medium is a non-metal power material which is uniformly mixed and consists of three powders: talcum powders H2Mg3(sio3)4, industrial salts NaCl and urease (NH4)2CO; the three powders are uniformly mixed respectively according to the mass proportion of 5-25%, 95-50% and 0-25%. The extrusion material range of the three-way pipeline of the invention is multiple high-plastic materials such as copper, iron, low carbon steel and cold extrusion stainless steel, etc.; therefore, the three-way pipeline can extrude and fabricate copper three-way pipeline, iron three-way pipeline, low carbon steel three-way pipeline and stainless steel three-way pipeline, etc. The non-metal filling medium and the process of the invention have obvious technical advantages of meeting the instruction requirement which is issued by European, Japan, etc. and contains that lead is not allowed to be added in the three-way pipeline production process, thereby completely avoiding the pollution of heavy metals such as lead, etc., having lower cost than the lead-pouring extrusion, having longer length and higher working efficiency than the oil (water) injection extrusion, and enlarging the ranging of extrusion material to the fields of multiple high-plastic material such as copper, iron, low carbon steel and stainless, etc.

Description

Technical field: [0001] The invention relates to a non-metallic filling medium for manufacturing pipeline tee fittings and a manufacturing process for extruding the tee with it, which can produce important pipeline fittings such as copper tees, steel tees and stainless steel tees, and can be widely used in refrigeration In the pipeline engineering system of industry, construction industry and chemical and food industries. Background technique: [0002] Tee is an important pipe fitting in pipeline engineering. It has been highly concerned by many manufacturers because of its wide application and wide range of industries. The manufacturing patents caused by tee are also particularly numerous; the technical methods are roughly divided into cold extrusion and hot extrusion. Two categories, of which the low-cost cold extrusion technology develops the fastest (hot extrusion develops slowly and is partially eliminated, so I won’t go into details here), and lead filling extrusion is...

AI Technical Summary

Problems solved by technology

[0003] Among the known extrusion technologies, the lead-filled extrusion tee has the best geometric dimensions and the lowest cost, but there is a problem of lead pollution; the length of the oil-filled (or water)-extruded third-way is obviously insufficient (especially φ9. Thin-walled small tees with specifications below 53), it is difficult to reach the length of lead-filled extrusion and the work efficiency is slow, so the current technology is still the most widely used lead-filled cold extrusion

[0004] In 2005, the European Union, Japan and other countries promulgated the directive that no lead should be added in the tee manufacturing process. In order to effectively solve the problem of lead pollution, a new product called "copper tee pipe" with patent application number 200520147320.6 appeared. technology, the essence of its manufacturing process is "lead-free extrusion + brazing", and the production cost is relatively high

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