Pneumatic tuck-in device for loom

Abstract

The invention discloses a pneumatic fold selvage device used for a weaving machine. The device comprises a left folding block and a right folding block. The left folding block is installed on the left side of a cloth, and a right folding block is installed on the right side of the cloth. The upper parts of the left folding block and the right folding block are provided with installing holes. The middle parts of the left folding block and the right folding block are provided with holding holes. The holding holes are connected with a first high-pressure air channel. The outer side of the holding hole is provided with a first folding hole and a second folding hole in sequence. The first folding hole is connected with a second high-pressure air channel. The second folding hole is connected with a third high-pressure air channel. Both of the left folding block and the right folding block are provided with a first technical hole and a second technical hole on the outer sides of the lower parts. The first technical hole is communicated with the second folding hole. The second technical hole is communicated with the first folding hole. The outer end faces of the first technical hole and the second technical hole are sealed. The inner side of the lower part of the folding block is provided with nozzle holes. The nozzle holes are communicated with the second technical hole. The air outlets of the nozzle holes are cooperated with a side of the cloth. The device realizes refined adjustment of flight attitude when yarns are folded, and control adjustability of fold selvage width is improved.

Description

technical field [0001] The invention relates to the technical field of loom equipment, in particular to a pneumatic hemming device for a loom. Background technique [0002] Air-jet looms in the prior art need to adopt pneumatic hemming when weaving smooth-edged fabrics. During pneumatic hemming, the folding-in block is used to perform the folding-in operation by using the folding-in airflow and the holding airflow. The problems with this structure and approach are: [0003] 1. The fold-in hole is divided into two directions of airflow: backward fold-in and inward fold-in. Since there is only one air intake hole, the pressure can only be adjusted together. It is difficult to fine-tune the flight attitude when the yarn is folded in, so that The difficulty of adjusting and controlling the width of fold-in side increases; [0004] 2. In the prior art, there are usually two methods of sealing the process hole of the folded block: rivet sealing and glue sealing. Among them, the ...

AI Technical Summary

Problems solved by technology

[0003] 1. The fold-in hole is divided into two directions of airflow: backward fold-in and inward fold-in. Since there is only one air intake hole, the pressure can only be adjusted together. It is difficult to fine-tune the flight attitude when the yarn is folded in, so that The difficulty of adjusting and controlling the folded-in edge width increases;

[0004] 2. In the prior art, there are usually two methods of sealing the process hole of the folded block: rivet sealing and glue sealing. Among them, the rivet sealing has the hidden danger of air leakage, and the glue sealing has the possibility of blocking the airway and long-term use. Hidden dangers such as aging and degumming;

[0005] 3. The tuck-in block size of the prior art is relatively thick, and it is difficult to control the tuck-in length within 8mm when making some special fabrics, which reduces the dyeing and penetration of the finished fabric and increases the printing and dyeing cost

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