Method for solving easy fracture at tail part of minor-caliber PE double-wall bellow flare

Abstract

The invention discloses a method for solving easy fracture at the tail part of minor-caliber PE double-wall bellow flare. The method comprises the following steps of: firstly using bonding materials to fill and firmly bond part of grooves at the tail part of the flare mould, using a fine sand paper to grinding rough parts to be smooth, then starting machines for production, carrying out plasticization and mixing, extrusion and continuous forming by an inner wall extrusion system and an outer wall extrusion system of the bellow production line and producing the minor-caliber PE double-wall bellow. The produced product does not have grooves at the inner wall of the tail part of the flare; the tail wall of the product flare is thick and even; and the tail part of the flare is not easy to occur longitudinal fracture in the processes of transportation, assembly and disassembly and site installation and conforms to the requirements of use and relevant standard parameters.

Description

technical field [0001] The invention relates to a processing method for a small-diameter PE double-wall corrugated pipe, in particular to a method for solving the problem of easy fracture of the flaring tail of the small-diameter PE double-wall corrugated pipe. Background technique [0002] With the continuous and rapid development of China's national economy, the scale of municipal construction is also expanding. Drainage and sewage pipes are an important part of the municipal pipe network system, and their performance will directly affect the reliability and safety of the sewage discharge system. Polyethylene (PE) double-wall corrugated pipes rely on their own unique advantages and have been used in drainage , Sewage has occupied an increasing market share. [0003] However, at present, domestically manufactured PE bellows molds can be seen Figure 1a and Figure 1b ,in, Figure 1a It is a schematic diagram of the existing mold flaring part structure, Figure 1b yes Fi...

AI Technical Summary

Problems solved by technology

The products produced by this mold have 12-16 ribs protruding from the outer wall of the flared tail, and the inner wall is sunken under the action of internal air and vacuum. After high-temperature plasticization, the viscosity and toughness are reduced to a certain extent. Since the outer diameter of the small-diameter PE double-wall corrugated pipe is larger than the outer diameter of other parts of the pipe, it is easy to land first and bear more force during loading, unloading, transportation and construction. Large, it is easy to cause longitudinal fracture and damage at the ribs of the flaring

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