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Filling medium for extrusion forming of pipe through part and pipe through part machining method

A technology of filling medium and extrusion molding, which is applied in the field of filling medium for pressure molding of pipe fittings, which can solve problems such as rough inner walls of pipe fittings, harm to human body and environment, and insufficient molding height, and achieve smooth inner walls, low cost, and The effect of high molding height

Pending Publication Date: 2022-07-22
施建辉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, lead is a heavy metal, which is very harmful to the human body and the environment. Therefore, in response to the requirements of environmental protection, lead filling extrusion has been gradually eliminated
[0004] With the elimination of lead-filled extrusion technology, salt-filled extrusion has emerged in recent years, that is, salt powder is used as the filling medium, but the inner wall of the pipe-through formed by the salt-filled extrusion process is rough and the wall thickness is uneven. The forming height is not enough, and there is a hidden danger that the pressure resistance will not meet the standard

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Filling medium for extrusion molding of pipe through parts, including: 10g porcelain powder and 100g paraffin wax.

[0030] The processing method of the pipe through piece includes the following steps:

[0031] (1) heating the paraffin wax at 72°C until the paraffin wax is completely melted, then adding the porcelain powder, stirring to make the porcelain powder evenly distributed in the liquid paraffin to obtain a liquid filling medium;

[0032] (2) pour the liquid filling medium into the straight copper tube with the inner diameter of 8.00mm, after cooling, put the copper tube filled with the filling medium into the extruder and extrude it into a T-shaped tube;

[0033] (3) Heating the T-shaped tube at 72° C. to melt and remove the filling medium. After removing the filling medium, a T-shaped tube through piece can be obtained, and the height of the T-shaped tube through piece is 42 mm.

[0034] Five parts of the T-shaped pipe through piece of this embodiment are sel...

Embodiment 2

[0036] Filling medium for extrusion molding of pipe-through parts, including: 30g porcelain powder and 100g paraffin wax.

[0037] The processing method of the pipe through piece is the same as that of Example 1.

[0038] Five parts of the T-shaped pipe through piece of this embodiment are selected for wall thickness measurement, and the results of the five wall thickness measurements are: 8.01mm, 8.00mm, 6.00mm, 6.51mm, and 7.00mm, which can be seen in this embodiment. The wall thickness of the prepared T-shaped pipe through piece is relatively uniform.

Embodiment 3

[0040] Filling medium for extrusion molding of pipe through parts, including: 60g porcelain powder and 100g paraffin wax.

[0041] The processing method of the pipe through piece is the same as that of Example 1.

[0042] The wall thickness measurement is carried out at five places of the T-shaped pipe through piece of this embodiment. The five wall thickness measurement results are: 8.00mm, 8.02mm, 6.01mm, 7.00mm, and 6.00mm. From this, it can be seen that this embodiment is The wall thickness of the prepared T-shaped pipe through piece is relatively uniform.

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Abstract

The invention provides a filling medium for extrusion forming of a pipe through part and a machining method of the pipe through part, and belongs to the technical field of pipe through part machining, and the filling medium for extrusion forming of the pipe through part comprises ceramic powder and paraffin; the machining method of the pipe through piece comprises the following steps that paraffin is hot-melted to be in a liquid state, then ceramic powder is added into the liquid paraffin to be evenly stirred, and a filling medium is obtained; filling a filling medium into the metal pipe, cooling, and then carrying out extrusion forming on the metal pipe; and the filling medium in the extruded and formed pipe fitting is removed after hot melting, and the pipe through piece can be obtained. The raw materials of the filling medium are non-toxic and harmless, the cost is low, the processing effect is good, the formed height of the processed pipe through part is high and can reach 40 mm or above, and the inner wall of the processed pipe through part is smooth and uniform in wall thickness.

Description

technical field [0001] The invention belongs to the technical field of pipe through-piece processing, and in particular relates to a filling medium for press-forming a pipe through-piece. In addition, the invention also relates to a pipe through-piece processing method. Background technique [0002] Commonly used pipe fittings in refrigeration systems include E type, Y type, T type, etc. The existing pipe fittings for refrigeration systems are basically made by extrusion process, specifically, metal pipes are mounted on an extruder for extrusion molding. [0003] The extrusion molding of the pipe through parts often adopts the cold extrusion technology. The traditional cold extrusion technology is lead extrusion, that is, the molten lead is poured into the metal tube, and the lead liquid is cooled and put into the extruder for extrusion. However, lead is a heavy metal, which is very harmful to human body and the environment. Therefore, in accordance with the requirements of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C37/29
CPCB21C37/29
Inventor 施建辉
Owner 施建辉
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