Improved needle cylinder of knitting machine

Abstract

The invention discloses an improved needle cylinder of a knitting machine. The needle cylinder comprises an upper needle disc and a lower needle cylinder, wherein the upper nozzle disc is provided with a plurality of inner needle slots which are distributed at equal cycle angles and a plurality of needle slot insertion pieces which are inserted in the inner needle slots; at least one ignition break groove is arranged on the inclined surface of the aperture of at least one of the upper needle disc and the lower needle cylinder; and the insertion piece is a linear insertion piece two ends of which have uneven thickness. Because the inclined surface of the aperture of the needle cylinder is provided with the ignition break groove, the needle cylinder of the knitting machine of the invention can accelerate the quenching process and shorten the quenching time, thus the needle cylinder dose not deform, stable production quality is ensured, and the yield of the production is improved; coining insertion piece is changed to the linear insertion piece and a point contact is changed to a surface contact, and the thickness size of the product is more easy to be controlled, thereby ensuring the coincidence of a needle and an outer needle slot, stability of the needle in the course of movement without swing, maintaining smoothly movement of the needle, reducing stopping rate, improving production rate and ensuring the quality of textiles.

Description

technical field [0001] The invention relates to a needle cylinder for a computerized circular knitting machine, in particular to an improved needle cylinder for a knitting machine. Background technique [0002] The high-precision needle cylinder used for the computerized circular knitting machine includes an upper dial and a lower needle cylinder, which are respectively installed on the upper dial seat and the lower needle cylinder seat of the computerized circular knitting machine. In order to increase the hardness of the mouth surface of the needle cylinder, thereby improving the use efficiency of the equipment and prolonging its service life, local heat treatment must be carried out at the mouth surface of the upper dial and the mouth surface of the lower needle cylinder, that is, quenching; while in the processing and production of the product In the process, when the steel is heat treated, it is very easy to deform due to heat, and the degree of product deformation is i...

AI Technical Summary

Problems solved by technology

Because the needle grooves on the needle cylinder are distributed on the outer peripheral surface of the needle cylinder at equal circumferential angles, and the inserts are inserted in it, and the inserts are radially distributed on the outer circumferential surface of the syringe due to the distribution of equal circumferential angles, then The outer needle slots formed between two adjacent inserts are in an inverted trapezoidal shape, causing the size of the outer mouth to be slightly larger than the size of the inner bottom. An inverted triangle gap is formed, causing the knitting needle to shake and become unstable when interweaving yarn loops up and down, making it difficult to guarantee the knitting quality

At present, the method used on the market is to use embossed inserts, that is, curved inserts, such as Figure 5 , Image 6 As shown, the embossed insert is provided with a curved surface at the outer end of the outer needle groove formed by it, and its thickness is increased through the curved surface formed by it, so that the outer needle groove formed by the adjacent two inserts matches the knitting needle, and the two inserts are aligned with the knitting needles. There are no more gaps between the two side walls of the knitting needle, which solves the problem of instability of the knitting needle to a certain extent. However, because the insert is a curved surface, the knitting needle is in point contact with the insert during the movement, which is easy to wear and needs frequent cleaning. Replacement and maintenance, at the same time, the friction force is large, and the production efficiency is difficult to improve; and the thickness of the insert is not easy to control, because the curved surface points of the embossed part may be high or low, so that it cannot be guaranteed to be completely consistent with the outer needle groove. When exercising, there will still be left and right swings. At the same time, when the moving speed of the knitting needles is different, the swing amplitudes are also different, so the deflection angles of the knitting needles are different. It may even lead to downtime; in addition, during use, dust and other substances are easy to stick to the embossed curve part, which requires frequent cleaning, which increases labor intensity and is very troublesome

Images