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Inner core mold for preparing thin-wall arc composite pipe and preparation method of arc pipe

A composite material tube and inner mandrel technology, which is applied in applications, household appliances, tubular objects, etc., can solve the problems of poor durability of foam mandrel, difficulty in demoulding silicone rods, and affecting product performance, so as to reduce porosity and guarantee Overall, stable and reliable performance

Inactive Publication Date: 2018-09-07
NEW UNITED GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The durability of the foam mandrel is poor, and most of them can only be used once. Moreover, in the process of laying the prepreg material of the foam mandrel, in order to fit the curve mandrel, the prepreg at the folds needs to be cut when laying, resulting in poor performance of the pipe fittings
In addition, the laying of the curved mandrel can only be done manually, and the production efficiency is low
However, if a silica gel rod is used as the mandrel, due to the intersection of rigidity and hardness of the silica gel rod, there will be wrinkles when the prepreg is laid, which will affect the performance of subsequent products; moreover, the thermal expansion performance of silica gel is limited by the performance of the silica gel material itself, so the expansion force is not high. At the same time, it is not easy to control; in addition, the silicone rod is difficult to demould, and it will be damaged after several uses, and the durability is poor

Method used

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  • Inner core mold for preparing thin-wall arc composite pipe and preparation method of arc pipe
  • Inner core mold for preparing thin-wall arc composite pipe and preparation method of arc pipe
  • Inner core mold for preparing thin-wall arc composite pipe and preparation method of arc pipe

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Effect test

Embodiment 1

[0045] Such as figure 1 Shown, a kind of inner mandrel that is used to prepare thin-walled curved composite pipe, described inner mandrel 14 is rigid inner mandrel, and described inner mandrel 14 is used for preparing thin-walled arcuate pipe, used The shape of the inner core mold 14 is a cylinder. The rigid inner mandrel can be an inner mandrel made of rigid materials such as metal pipe or metal mandrel or plastic pipe or plastic core material.

[0046] In order to facilitate the demoulding of the prefabricated body, such as figure 1 As shown, the inner mandrel 14 includes an inner mandrel main body 14-1 and a demoulding part 14-2, the inner mandrel main body 14-1 is provided with an insert block 14-3, and the demoulding part 14-2 is provided with The groove, the inner core mold main body 14-1 and the demoulding part 14-2 are detachably connected through the cooperation of the insert block 14-3 and the groove.

[0047] A method for preparing a thin-walled arc-shaped compos...

Embodiment 2

[0077] An inner mandrel for preparing a thin-walled arc-shaped composite pipe, the inner mandrel is a rigid inner mandrel, and the inner mandrel is used for preparing a thin-walled arc-shaped pipe, and the shape of the inner mandrel used is It is a truncated cone, and the angle of the truncated cone is greater than 0° and less than or equal to 10°, which is not shown in the structural diagram. The angle of the truncated cone here refers to the angle between the central line of the truncated cone and its generatrix. The rigid inner mandrel can be an inner mandrel made of rigid materials such as metal pipe or metal mandrel or plastic pipe or plastic core material. When the angle of the frustum is equal to 0°, the frustum transforms into a cylinder.

[0078] A method for preparing a thin-walled arc-shaped composite material tube, comprising the steps of:

[0079] Step S1, surface treatment of the inner mandrel: apply sealing agent and mold release agent on the surface of the in...

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Abstract

The invention discloses an inner core mold for preparing a thin-wall arc composite pipe and a preparation method of the arc pipe. The inner core mold is a rigid inner core mold and is used for preparing the thin-wall arc pipe. The shape of the used inner core mold is a cylinder or a truncated cone, and the angle of the truncated cone is larger than 0 degree and smaller than or equal to 10 degrees.The straight inner core mold is used for replacing an arc inner core mold in the prior art for preparing the arc composite pipe; on one hand, through the adoption of the inner core mold, a pipe coiling machine can be used for carrying out prepreg coiling, and production efficiency is improved; and on the other hand, the straight inner core mold is adopted, prepreg laying is more convenient, it can be ensured that the prepreg laying angle meets the design requirement of the overall layer angle of the arc pipe, prepreg lap joint is reduced, layer integrity is guaranteed, and therefore the performance of a prepared pipe fitting is more excellent.

Description

technical field [0001] The invention relates to an inner mandrel for preparing a thin-walled curved composite material pipe and a preparation method for the curved pipe, belonging to the technical field of composite material pipe fittings. Background technique [0002] At present, for thin-walled arc-shaped composite pipe fittings, soft materials are generally used as mandrels, such as curved columnar foam mandrels or silica gel rods. The foam mandrel has poor durability, and most of them can only be used once. Moreover, in the process of laying the prepreg, in order to fit the curved mandrel, the prepreg at the folds needs to be cut during laying, resulting in poor performance of the pipe fittings. In addition, the laying of the curved mandrel can only be done manually, and the production efficiency is low. However, if a silica gel rod is used as the mandrel, due to the intersection of rigidity and hardness of the silica gel rod, there will be wrinkles when the prepreg is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/30B29C70/34B29C70/54B29L23/00
Inventor 方聃王伟志徐建东穆举杰
Owner NEW UNITED GROUP
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