Mold for preparing variable diameter glass fibre reinforced plastic pipeline

Abstract

The invention belongs to the field of die technique, and particularly discloses a die used for preparing variable-diameter FRP pipe. The main technical proposal is as follows: a long rotation shaft is started by a power mechanism; the rotation shaft is sleeved by at least two cylindrical dies; the cylindrical die consists of a cylinder part and a structure with the end in cone shape, wherein, the cone mouth of the cylindrical die is sleeved on the rotation shaft; the cone mouths of other cylindrical die are respectively sleeved on the cylinder part of the cylindrical die; and the other end of the cylindrical die is respectively and oppositely fixed with the rotation shaft. The die used for preparing the variable-diameter FRP pipe can directly produce the die which can directly produce the variable-diameter FRP pipeline which is integrated into a whole and has no joint seam, and overcomes the defects that the variable-diameter FRP pipeline which is prepared by manual pasting has non-uniform bearing performance and is easy to seep. The die can prepare variable-diameter FRP pipes of different specifications, greatly improves the utilization ratio of the die and reduces the production cost.

Description

technical field [0001] The invention belongs to the technical field of moulds, and in particular relates to a mold for preparing variable-diameter FRP pipes. Background technique [0002] At present, FRP pipes with variable diameters are all produced by segmental preparation and manual pasting. That is to produce pipe sections of different diameters and variable-diameter connecting pipe sections, and then connect the variable-diameter connecting pipe sections to pipes of different diameters through a manual pasting process to prepare variable-diameter FRP pipes. This variable-diameter pipe and its preparation process have the following defects: First, in the above-mentioned production process of the FRP pipe, the variable-diameter connecting pipe section and the connection between the connecting pipe section and the pipe section of different pipe diameters can only be pasted by hand. Therefore, there is a defect that the manufacturing process of the variable-diameter FRP pi...

AI Technical Summary

Problems solved by technology

This variable-diameter pipe and its preparation process have the following defects: First, in the above-mentioned production process of the FRP pipe, the variable-diameter connecting pipe section and the connection between the connecting pipe section and the pipe section of different pipe diameters can only be pasted by hand. Therefore, there is a defect that the manufacturing process of the variable-diameter FRP pipe is complicated and labor-intensive; secondly, due to manual pasting, the materials of the variable-diameter connecting pipe section and the connecting joint between the connecting pipe section and the FRP pipe section are not the same , and the two are connected by paste, so the pressure-bearing performance of each pipe section in the formed variable-diameter FRP pipe is inconsistent, which will seriously affect the service life of the overall variable-diameter FRP pipe; third, use the above process to produce The variable-diameter FRP pipe, especially the inner wall of the joint formed by the connection between the variable-diameter connecting pipe section with a diameter of less than 600 mm and the pipe section with different pipe diameters, forms a connection gap because it cannot be manually processed. During use, Due to the unbalanced force on the inner and outer walls of the connection gap, the connection layer pasted on the outer wall will fall off, which will lead to the leakage of the variable-diameter FRP pipe.

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