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Mold and forming method of a bent pipe

A molding method and mold technology, applied in the field of hard alloy preparation, can solve the problems of reduced replacement frequency and difficulty in forming hard alloy elbows, and achieve the effect of reducing the frequency of replacement, reducing the frequency of changing elbows, and improving work efficiency

Active Publication Date: 2020-06-16
SEED TECH CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above technical problems, the first object of the present invention is to provide a mold for bending pipes; the second object of the present invention is to provide a method for forming pipe bends using the mold; the present invention utilizes powder metallurgy injection molding method , which solves the problem that hard alloy elbows are difficult to form, and the prepared elbows have better wear resistance, corrosion resistance, and erosion resistance than existing products, with longer service life and reduced replacement frequency

Method used

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  • Mold and forming method of a bent pipe
  • Mold and forming method of a bent pipe
  • Mold and forming method of a bent pipe

Examples

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Effect test

Embodiment 1

[0059] Example 1 Mold Injection Molded Elbow

[0060] The mold includes an upper mold 1, a lower mold 2, and a core rod 3 arranged between the upper mold 1 and the lower mold 2, and the core rod 3 is connected to the upper mold 1, the lower mold 2 A cavity for the powder embryo product 4 is formed between them, and the upper mold half 1 is provided with an injection flow channel 11 . It also includes a cover plate 5 arranged above the upper mold half 1 and having a material pool 51 , and the material pool 51 communicates with the injection channel 11 . It also includes a bushing 6 arranged above the cover plate 5 , and the bushing 6 has an injection gate 61 communicating with the pool 51 . It also includes a detachable fixing part 7, which fixedly connects the upper half-mold 1 and the lower half-mold 2, and the fixing part 7 is a pin in this embodiment.

[0061] The core rod 3 includes a curved section 31 and a straight section 32 which are detachably connected.

[0062] T...

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Abstract

The invention discloses a bent pipe mould. The bent pipe mould comprises an upper half mould (1), a lower half mould (2) and a core rod (3) which is arranged between the upper half mould (1) and the lower half mould (2), wherein a mould cavity of a powder blank product (4) is formed among the core rod (3), the upper half mould (1) and the lower half mould (2); and an injection runner (11) is arranged on the upper half mould (1). The invention further provides a bent pipe forming method using the mould. A powder metallurgic injection-molding method is utilized, so that the problem that a hard alloy bent pipe is difficult to form is solved; and the manufactured bent pipe has wear resistance, corrosion resistance and abrasion resistance which exceed those of an existing product, is longer inservice life, and is lower in replacing frequency.

Description

technical field [0001] The present application relates to the technical field of cemented carbide preparation, in particular to a mold and a forming method for a bent pipe. Background technique [0002] Elbow is a commonly used connecting pipe fitting in pipeline installation. It is used to connect the bend of the pipeline and change the direction of the pipeline. In the actual operation of oil, natural gas or mineral processing, chemical industry and other industries, due to the particularity of the working environment, it is necessary to use a large number of pipelines as the transport carrier, so a large number of elbows are needed to change the direction of the fluid. The wear of the elbow in the pipeline is the most serious, so the elbow must have good wear resistance, corrosion resistance and impact toughness. [0003] At present, the common elbows in the prior art are generally cast steel structures, which have poor wear resistance and are easily corroded in long-ter...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/22B22F5/12
Inventor 徐跃华巫吉
Owner SEED TECH CORP LTD