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U type injection moulding elbow and processing method thereof

A processing method and technology of elbows, applied in the direction of elbows, pipes/pipe joints/fittings, siphons, etc., can solve problems such as film removal

Active Publication Date: 2011-05-04
杭州华电华源环境工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the plastic injection molded parts are to be kept hollow, there must be a problem of stripping
There is a parallel straight pipe section at both ends of the U-shaped elbow. If the structure is the same as that of the metal casting elbow, it cannot be stripped.

Method used

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  • U type injection moulding elbow and processing method thereof
  • U type injection moulding elbow and processing method thereof
  • U type injection moulding elbow and processing method thereof

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Embodiment Construction

[0017] The present invention will be further described below in conjunction with drawings and embodiments.

[0018] Such as figure 1 Shown, the present invention it is all made up of straight round pipe 2 by the arc circular tube 1 of one section A section 120~175 degree and two sections nozzles, and the internal diameter of straight circular tube 2 is greater than arc circular tube 1 internal diameter.

[0019] The straight round tubes 2 of the two sections of nozzles are parallel to each other, or the included angle thereof is within ±10 degrees.

[0020] The invention discloses a processing method of a U-shaped injection elbow. The mold is composed of a female mold and a male mold. The male mold is composed of a 120-175 degree arc circular male mold and two cylindrical male molds, the diameter of the arc circular male mold is smaller than the diameter of the two cylindrical male molds, and the arc circular male mold part is demolded by rotation.

[0021] The arc-shaped ci...

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PUM

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Abstract

The invention discloses a U-shaped injection molding elbow and a processing method; the U-shaped injection elbow consists of an arc-shaped round pipe 1 with the range of 120-175 degrees and two straight round pipes 2 with straight nozzles; the internal diameter f the straight round pipe 2 is more than the internal diameter of the arc-shaped round pipe 1; a die consists of a concave die and a convex die, wherein, the convex die consists of an arc-shaped round convex die with the range of 120-175 degrees and two cylindrical convex dies; the diameter of the arc-shaped round convex die is less than the diameter of the two cylindrical convex dies; the rotation demoulding is adopted by the arc-shaped round convex die part. The U-shaped injection elbow solves the difficult problem of processing the U-shaped injection elbow, and leads the plastic pipe made into snake-shaped pipe heat exchanger to be possible; the radian of the arc-shaped round pipe is not traditional 180 degrees but less than180 degrees; and the demoulding process comprises twice demoulding such as linear demoulding and rotation demoulding.

Description

technical field [0001] The invention relates to a U-shaped injection molded elbow of a heat exchanger, which can be used in all plastic serpentine coil heat exchangers. Background technique [0002] The serpentine coil heat exchanger is a commonly used heat exchanger. For example, almost all household air conditioner heat exchangers are serpentine coil heat exchangers. Some serpentine coil heat exchangers are made by bending, and most serpentine coil heat exchangers are welded by straight tubes and U-shaped elbows. For the casting of metal U-shaped elbows, it is easy to realize because there is no problem of stripping. However, if the plastic injection molded parts are to be kept hollow, there must be a problem of stripping. There is a parallel straight pipe section at both ends of the U-shaped elbow. If the structure is the same as that of the metal casting elbow, it cannot be stripped. Before the present invention, there was no U-shaped injection elbow. The invention c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16L43/00B29C45/26
Inventor 董兴杰陈永林叶水泉王万琴
Owner 杭州华电华源环境工程有限公司