Apparatus for shaping double wall pipes with screw connections

Abstract

PURPOSE: A double-wall pipe connected spirally and a double-wall pipe forming device are provided to conveniently connect double-wall pipes without couplings by forming a double-wall screw pipe. CONSTITUTION: A double-wall pipe forming device comprises an inner circumference processing unit(100), an outer circumference processing unit(200), and a cutting unit. The inner circumference processing unit includes a feeding unit(180) installed on a table(170) in which a motor(160) is installed and an end mill rotating at a high speed by the driving force of a motor(110). The inner circumference processing unit forms a female screw portion on an inner wall. The outer circumference processing unit includes a feeding unit and an outer circumference processing cutter(250). The outer circumference processing unit forms a male screw portion on an outer wall. The cutting unit cuts one side of the male screw portion.

Description

【Technical field】 [0001] The invention relates to a threaded double-wall pipe forming device. For double-wall pipes with one or more quadrangular or circular holes inside, screws and nuts are formed at both ends of the pipe, which can easily connect the double-wall pipes to each other. Specifically, it relates to a threaded double-wall pipe forming device. The forming device integrally forms screws and nuts at both ends of the double-wall pipe to form a double-wall spiral pipe, and realizes simple connection through thread connection. 【Background technique】 [0002] In the previous double-wall pipe production process, the shape 30 with one or more quadrangular or circular holes 310 inside was extruded by the shape extrusion device 10, cooled by the cooling device 20, and sent to the hoist of the pipe forming device 40 41. At this time, the molten resin is supplied from the nozzle 61 connected to the extruding device 60 to between the outer shapes 30 to make a smooth syntheti...

AI Technical Summary

Problems solved by technology

[0006] However, many connection methods in the past do not change the connecting pipe or directly connect it, so it is necessary to prepare an additional interface or set another interface on the double-walled pipe, so the cost of the interface is relatively large.

[0007] In addition, the consumption of the interface not only increases the project cost, but if the interface is not set properly, it will also cause water leakage and pollute the soil

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