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Preparation method of extrusion pipe

A technology for extruding tubes and tube blanks, which is applied in the fields of refrigeration and fine chemicals, can solve the problems of pollution, energy consumption, and high melting point of lead, and achieve the effects of simple process, realization of recycling, and broad application prospects.

Inactive Publication Date: 2014-06-25
TAIZHOU HUIHENG REFRIGERATION EQUIP
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Problems solved by technology

[0003] In addition, in the process of lead removal, lead has a high melting point, and acetic acid and hydrogen peroxide are used, which has problems of energy consumption and pollution

Method used

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  • Preparation method of extrusion pipe
  • Preparation method of extrusion pipe

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Experimental program
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Embodiment 1 3

[0021] Embodiment 1 Tee pipe preparation

[0022] Preparation of filling agent: After treating industrial salt with moisture absorption or adding high-temperature softener, mix each component according to the formula in Table 1, melt in a holding furnace and keep warm for later use.

[0023] Extruded tube pre-treatment: the tube to be processed (such as figure 1 ) after cleaning and drying, soak in silicone oil, and then degrease and dry.

[0024] Pouring and extrusion: pour the heat-insulating molten filler into the pre-treated tube blank, the filler is naturally cooled and solidified at room temperature, and the tube blank poured with the filler is put into the prefabricated three-way mold for extrusion processing Get tee preforms (such as figure 2 ).

[0025] The prefabricated parts are desalted at high temperature (450-600°C) to recover the filler, and then bent and shaped to obtain the product.

[0026] Table 1. Filler formulations

[0027] serial number

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Abstract

The invention belongs to the technical field of refrigeration and fine chemicals and in particular relates to a preparation method of an extrusion pipe. The method comprises the following steps: washing and drying a pipe blank, soaking in silicon oil, de-oiling and drying; then, filling an insulated molten filler into the preprocessed pipe blank, naturally cooling and solidifying the filler at normal temperature, putting the pipe blank filled with the filler into a prefabricated three-way mould, and extruding to obtain a prefabricated part, wherein the filler adopts sodium chloride as a base material and is added or not added with other auxiliary materials; finally, performing high-temperature annealing on the prefabricated part, recovering the filler, bending and forming to obtain the extrusion pipe. The process is simple, clean and environment-friendly, achieves material recycling and has a wide application prospect.

Description

technical field [0001] The invention relates to a preparation method of an extruded tube, belonging to the technical fields of refrigeration and fine chemical industry. Background technique [0002] Some special-shaped pipe fittings, such as tees, are made by extrusion of ordinary straight pipes. The preparation process of traditional extruded pipes (tees, crosses, etc.) is: after the tube blank is cleaned and dried, it is Lead filling, extrusion, heat preservation, bending, lead removal, and finally cleaning and molding. The lead used as a filler is a heavy metal pollutant, which is highly toxic to the human body and can accumulate in the human body. [0003] In addition, in the process of lead removal, lead has a high melting point, and acetic acid and hydrogen peroxide must be used, which has problems of energy consumption and pollution. [0004] A clean and environmentally friendly extrusion tube preparation method needs to be developed and applied. Contents of the i...

Claims

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Application Information

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IPC IPC(8): B21C37/29
Inventor 卢于兵陈茂坤
Owner TAIZHOU HUIHENG REFRIGERATION EQUIP
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