Building block type pipeline mould

Abstract

The invention discloses a building block type pipeline mould. The mould comprises a core mould and mould blocks. The mould is characterized in that the core mould is tube-shaped; the mould blocks are in insertion connection with the core mould and are arranged on the external surface of the core mould in a matching manner; the mould blocks can move along the axial direction of the core mould; themould blocks have arc-shaped external surfaces; and the external surfaces defining a circle form a perfect circle. The building block type pipeline mould has the following beneficial effects: the building block type pipeline mould is simple in structure, unique in design and convenient to install; as the inner cavity of the produced pipeline is in the shape of a perfect circle, the pipeline is uniformly stressed, is free from stress concentration and is not easy to crack, thus greatly improving the pipeline strength; and meanwhile, the mould can be repeatedly used and is not easy to damage, the service life of the mould is prolonged and the production cost is lowered.

Description

technical field [0001] The invention relates to a pipe production mold, in particular to a pipe production mold for producing thermosetting plastic composite materials. Background technique [0002] At present, in the production of composite plastic pipes, the most conventional method is to use a fixed-length mold, and wrap the composite plastic on the mold to make the pipe. After curing, it needs to be demoulded before it can be used. This kind of mold is relatively common, and the pipeline manufacturing process is relatively complicated. The pipeline needs to be demoulded, and the movement of the mold is troublesome. The most important thing is that continuous production is not possible, the production efficiency is relatively low, the relative degree of mechanization is relatively low, and the labor intensity is relatively high. According to the improvement, we have obtained a continuous production method that spirally winds the steel strip on a rotating shaft, and the co...

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Problems solved by technology

However, this kind of steel belt as the mold also has a defect, that is, the outer circumference formed by the spiral winding of the steel belt is often not a perfect circle, and the inner cavity of the produced pipe is also not a perfect circle. When this kind of pipe is used, it will be stressed. Unevenness, stress concentration forms weak points and causes pipe rupture

At the same time, in the continuous circulation of the steel strip, due to the lack of toughness of the steel strip, it often breaks and has a short service life, and the replacement is frequent during production, which will increase the cost

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