Combined weft yarn spray pipe and manufacturing method thereof

Abstract

The invention provides a combined weft yarn spray pipe. The combined weft yarn spray pipe comprises an outer pipe and an inner pipe which are coaxially arranged, the outer pipe is a straight pipe, the inner pipe is embedded in the end, close to a nozzle, of the outer pipe, the outer wall of the inner pipe and the inner wall of the outer pipe are connected through glue, and the inner wall of the inner pipe comprises a cylindrical face with the inner diameter smaller than that of the outer pipe and a conical surface with the small end connected with the cylindrical face. The large head end of the conical surface is in contact with the inner wall of the outer pipe, so that the conical surface forms a transition surface between the cylindrical surface and the inner wall of the outer pipe, the Laval effect can be generated, the split design of the outer pipe and the inner pipe can be utilized, and the machining process is simplified; and the technical effects of being simple in structure, convenient to machine, high in machining efficiency, low in cost and suitable for improvement of an existing air jet loom are achieved. According to a manufacturing method, the super glue is smeared on the outer wall of the inner pipe and then rotationally inserted into the outer pipe, the super glue can be distributed in the circumferential direction of the outer wall of the inner pipe, the bonding effect and the sealing performance are good, operation is easy, implementation is easy, and application and popularization are convenient.

Description

technical field [0001] The invention belongs to the technical field of air-jet looms, and in particular relates to a combined weft yarn nozzle and a manufacturing method thereof. Background technique [0002] The weft yarn nozzle is an important part of the air-jet loom to transport the weft yarn. Its length and internal structure will seriously affect the weft yarn handling capacity. Improve the carrying force of the weft yarn, such as the Chinese patent CN1548596A discloses such a weft yarn nozzle, and discloses that the longer the length of the weft yarn nozzle, the higher the handling force, but when the tube is made, due to the small diameter of the tube, the length of the tube Large, with a taper in the inner hole, it needs to be processed by special methods such as hot drawing, the processing efficiency is low, and the cost is high. There is also a tapered cavity in the nozzle body to form a Rafal effect, and a long straight tube is connected externally as a weft yarn...

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Problems solved by technology

[0002] The weft yarn nozzle is an important part of the air-jet loom to transport the weft yarn. Its length and internal structure will seriously affect the weft yarn handling force. Improve the carrying force of the weft yarn, such as the Chinese patent CN1548596A discloses such a weft yarn nozzle, and discloses that the longer the length of the weft yarn nozzle, the higher the handling force, but when the tube is made, due to the small diameter of the tube, the length of the tube Large, with a taper in the inner hole, it needs to be processed by special methods such as hot drawing, the processing efficiency is low, and the cost is high. There is also a tapered cavity in the nozzle body to form a Rafal effect, and a long straight tube is connected externally as a weft yarn The way of the nozzle, but this way needs to change the original structure of the nozzle body, which cannot adapt to the transformation of the existing air-jet loom

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