Double-wall corrugated pipe injection molding flaring machine

Abstract

The invention relates to the technical field of pipeline connection structures and equipment thereof, and relates to a double-wall corrugated pipe injection molding flaring machine. The double-wall corrugated pipe injection molding flaring machine comprises a feeding mechanism, a conveying mechanism and an extrusion mechanism which are sequentially connected, wherein the extrusion mechanism comprises a mold-locking mechanism which is connected with the conveying mechanism, and a single-screw extruder; after entering the mold-locking mechanism, a material is extruded by the single-screw extruder; the single-screw extruder is connected with a hydraulic station. The double-wall corrugated pipe injection molding flaring machine adopts the single-screw extruder which is made of polyethylene (PE) and is high in efficiency and low in power consumption, so that the material amount required by a flaring part of a PE double-wall corrugated pipe is realized at high speed and with high yield, the material is high in plasticizing quality, and the flaring quality is ensured. According to the double-wall corrugated pipe injection molding flaring machine, in an injection molding flaring manner, the defects of the PE double-wall corrugated pipe for flaring in the conventional manner can be overcome, the flaring quality is high, the length of a pipe material is changeable, and the flaring shape can be determined by a customer.

Description

[0001] technical field [0002] The present invention relates to the technical field of pipe connection structures and equipment thereof, and more specifically, to an injection molding bellows machine for double-wall corrugated pipes. Background technique [0003] The existing HDPE double-wall corrugated pipe is a new type of lightweight pipe made of high-density polyethylene. It has the characteristics of light weight, high pressure resistance, good toughness, fast construction and long life. Its excellent pipe wall structure design is different from other Compared with structural pipes, the cost is greatly reduced, and it has been widely used at home and abroad, replacing concrete pipes and cast iron pipes in large quantities. For example, the existing Chinese patent announcement number is CN201502804U disclosed injection-molded plastic double-wall corrugated pipe, which has significant advantages such as high ring stiffness and large pipe diameter. In order to facilita...

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Problems solved by technology

The above two methods have their disadvantages: the online production method is slow in forming speed, which is easy to reduce the production efficiency, and the flared head formed by online production is prone to water leakage and poor appearance quality, and it is difficult to ensure the quality stability of the flared head connection. The bellows socket is not strong enough and easy to deform, and the production speed of the pipe is limited by the forming of the socket, so the production speed is low; the bellows with the socket needs to be manufactured offline, and the double-wall bellows and the socket are made separately first, Then it is manually connected to the bellows. The connection strength between the bellows and the socket made by this method is insufficient, and it is a waste of labor.

Taking DN / ID500mm as an example, the minimum socket wall thickness of the two standards is greater than 11.4mm. However, no matter whether the domestic production line or the imported production line, the wall thickness of the two-layer superposition cannot meet the standard requirements.

Furthermore, the double-layer technology of PE double-wall corrugated pipes produced by domestic and foreign manufacturers is not yet mature, mainly because the problem of double-wall bonding has not been solved, and even small-caliber (below 400mm) pipes can barely make double-layer pipes. Expansion, the yield is also very low

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