Double-faced circular weft knitting machine

Abstract

The invention relates to the technical field of knitting, and provides a double-sided circular weft knitting machine which comprises a needle cylinder and a knitting needle arranged in a needle cylinder insertion piece groove, the knitting needle comprises a needle rod and a needle head, a needle butt is arranged on one side of the needle rod, a protruding portion protruding towards the needle cylinder is arranged on the V-shaped roundabout section, between the needle butt and the needle head, of the needle rod, and the protruding portion protrudes towards the needle cylinder. A first annular oil breaking groove is formed in the position, below the nozzle opening, of the needle cylinder, a detachable oil suction ring is embedded in the first annular oil breaking groove, and the face, facing the knitting needle, of the oil suction ring is in contact fit with a protruding part of the knitting needle to block and adsorb knitting oil driven in the needle jack stage of the knitting needle. The problem that knitting oil is driven to intrude into a knitting area to pollute a fabric and form a white oil needle in the needle jacking stage of an existing circular weft knitting machine is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of knitting, in particular to a double-sided circular knitting machine. Background Art

[0002] During the production process of circular knitting machines, the needles move back and forth at high speed in the needle grooves and follow the circular motion of the needle cylinder (or needle disc). This generates friction between the needles and the walls of the needle grooves. To reduce this friction, knitting oil is continuously and automatically added during operation. The oil film formed by the oil has the following functions: reducing the surface friction coefficient between the needles, needle cylinder, and cam, reducing frictional resistance and acting as a lubricant; reducing wear and extending the service life of the needles, needle cylinder, and cam; and reducing the heat generated by the friction of the moving components, keeping the knitting machine at a suitable operating temperature. Knitting oil is essential for knitting machines in the production of fabrics. However, during the weaving process, when a certain amount of knitting oil enters the weaving area through the needles or sinkers and adheres to the yarn, it is woven into the fabric, forming continuous or intermittent whitish or black oil streaks on the fabric surface. The industry customarily refers to such oil streaks as oil needles (oil paths). Especially in today's circular knitting machine's needle cylinder, with its popular fine gauge, high needle count, and large cylinder diameter, the surface friction between the needles, cylinder, and cam generates significant heat and temperature rise. This reduces the viscosity of the knitting oil, making it less likely to adhere to the needle bar and the walls of the needle groove. Its fluidity increases, and as the circular knitting machine operates, the oil adhering to the needle grooves and needle butts of the needle disk is swung toward the outer diameter by centrifugal force, reaching the needle hook and the nozzle of the cylinder, where it is carried into the fabric, causing oil needles. Normally, knitting oil has a good affinity with metal. When the needles and sinkers reciprocate in the oil-containing needle grooves, the oil is carried to oil-free or oil-poor areas due to the microscopic unevenness of the surface. Once the oil carried to the weaving area contacts the yarn, it is absorbed by the yarn and woven into the fabric. Subsequent oil is carried to this area and also woven into the fabric, causing oil needle defects. The "white oil needles" in the oil needles are a weaving defect that is difficult to completely overcome. "White oil needles" are longitudinal strip defects caused by knitting oil contamination during weaving on circular knitting machines, forming longitudinal white oil stains that are continuous or discontinuously distributed. The existing technology to address this problem is to set an oil break groove behind the needle mouth to support the needle working surface. However, this method can only provide partial protection. It is completely unavoidable that the knitting oil driven by the high-speed movement of the knitting needles will be thrown to the outer diameter of the needle disk under the action of centrifugal force and invade the weaving area. As a result, the oil needles will cause a sharp increase in the degreasing cost of the fabric in the next dyeing and finishing process, and bring many inconveniences to quality control. For example, Chinese patent document CN202220484212.1 discloses a needle cylinder structure for oil-proof needles and a circular knitting machine. This needle cylinder structure for oil-proof needles includes a needle cylinder and a sinker. The needle cylinder is provided with a plurality of barrel opening grooves, and the sinker is inserted into or withdrawn from the barrel opening grooves. The needle cylinder is characterized in that: the needle cylinder is provided with a notch ring groove around the outer wall of the needle cylinder. The notch ring groove corresponds to the intersection of the bottom surface of the barrel opening groove and the outer wall of the needle cylinder, and forms a guide slope facing outward and sloping downward. The guide slope forms an obtuse angle structure with the bottom surface of the barrel opening groove. The edge position of the bottom surface of the barrel opening groove forms an obtuse angle structure. This obtuse angle structure greatly reduces the degree of friction between the edge of the bottom surface of the barrel opening groove and the bottom edge of the sinker, greatly reducing the amount of debris and avoiding the problem of debris accumulation. Therefore, the circular knitting machine will not produce black oil after long-term operation, thereby preventing the black oil from being contaminated on the knitting needles and brought to the cloth surface to cause oil needle problems. While the aforementioned patent addresses the issue of black oil on circular knitting machines, it lacks an effective solution for white oil on needles. Existing technology can only mitigate this problem by using a combination of oil shutoff troughs and short-term cleaning. Consequently, the problem of white oil on circular knitting machines, where knitting oil enters the knitting area during the needle thrusting phase and contaminates the fabric, presents a pressing technical challenge. Summary of the Invention

[0003] Therefore, in response to the above-mentioned problems, the present invention proposes a double-sided circular knitting machine, which effectively blocks the knitting oil from being driven by the reciprocating motion of the knitting needles and the centrifugal force to invade the knitting area during knitting, thereby improving the quality of the fabric, facilitating maintenance and use, and extending the period of cleaning.

[0004] To solve this technical problem, the present invention adopts the following solution: a double-sided circular knitting machine, comprising a needle cylinder, a knitting needle arranged in a needle cylinder insert slot, the knitting needle comprising a needle bar and a needle head, a needle butt being provided on one side of the needle bar, a V-shaped winding section of the needle bar between the needle butt and the needle head being provided with a protrusion protruding toward the needle cylinder, the needle cylinder being provided with a first annular oil-breaking groove below the nozzle, a detachable oil suction ring being embedded in the first annular oil-breaking groove, the side of the oil suction ring facing the knitting needle being in contact with the protrusion of the knitting needle to block and absorb the knitting oil driven by the knitting needle in the needle-lifting stage.

[0005] Furthermore, the surface of the oil suction ring is higher than the notch of the first annular oil-breaking groove.

[0006] Furthermore, the oil absorption ring is any one of graphene-based sponge or oil absorption cotton.

[0007] Furthermore, the bottom of the nozzle groove of the syringe is a dovetail-shaped nozzle groove bottom that is higher than the needle bottom, and the needle bottom of the syringe is inclined from one end away from the nozzle groove toward the bottom of the nozzle groove.

[0008] Furthermore, the needle cylinder is provided with a second annular oil-breaking groove below the first annular oil-breaking groove, and the second annular oil-breaking groove cooperates with the knitting needles to block the knitting oil driven by the knitting needles during the needle-lifting stage.

[0009] Furthermore, the needle cylinder is further provided with an oil drain groove, which is respectively connected to the first annular oil-breaking groove and the second annular oil-breaking groove and discharges the knitting oil blocked in the first annular oil-breaking groove and the second annular oil-breaking groove.

[0010] Furthermore, the raised portion of the needle bar is a V-shaped, winding raised portion that bends from the side where the needle butt is provided to the opposite side.

[0011] By adopting the above-mentioned technical solution, the beneficial effect of the present invention is as follows: by arranging a protrusion on the side of the needle bar of the knitting needle away from the needle butt and arranging a first annular oil-breaking groove below the nozzle groove of the needle cylinder, the oil suction ring embedded in the first annular oil-breaking groove contacts and cooperates with the protrusion at the V-shaped detour of the needle bar to block and absorb the excess knitting oil accumulated in the insert groove during the needle-lifting stage of the knitting needle, so that the knitting circular knitting machine can effectively block the knitting oil from being driven by the knitting needle to invade the knitting area during knitting, effectively solving the problem of knitting oil contaminating the fabric when knitting into loops, thereby solving the problem of "white oil needles" and improving the quality of the fabric. During maintenance, the knitting needle only needs to be disassembled to replace the oil suction ring, and the oil suction ring can be drained and then recycled for multiple uses, which is low-cost, easy to maintain, and extends the cycle required for cleaning the machine. The surface of the oil suction ring is higher than the groove of the first annular oil-breaking groove, which can effectively ensure that the raised part of the needle bar blocks and absorbs the knitting oil when cooperating with the oil suction ring to prevent the influence of excessive knitting oil caused by negligence or improper control. The bottom of the nozzle groove of the needle cylinder is a dovetail-shaped nozzle groove bottom higher than the needle bottom. The needle bottom is inclined from the end away from the nozzle groove toward the bottom of the nozzle groove. The residual knitting oil can be blocked again and the knitting oil can flow into the first annular oil-breaking groove to prevent the knitting oil from flowing out to the weaving area. The second annular oil-breaking groove is set so that the knitting needle drives the knitting oil and dirt in the insert groove to be blocked first, reducing the friction with the knitting needle and reducing the knitting oil carryover. Cooperating with the first annular oil-breaking groove, etc., multiple blockages are formed to effectively prevent the knitting oil from flowing out and invading the weaving area, avoid the appearance of white oil needles affecting the quality of the fabric, reduce the degreasing problem of the next dyeing and finishing process of the fabric and reduce production costs. It can be widely promoted and applied. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a partial structural diagram of an embodiment of the present invention; Figure 2 is a partial structural diagram of another state of an embodiment of the present invention; Figure 3 2 is a schematic structural diagram of a knitting needle in an embodiment of the present invention; Figure 4 2 is a schematic diagram of a partial cross-sectional structure of a syringe in an embodiment of the present invention.

[0013] In the figure, 1. needle cylinder, 2. knitting needle, 3. oil suction ring, 11. nozzle groove bottom, 12. needle bottom, 13. first annular oil-breaking groove, 14. second annular oil-breaking groove, 15. oil drain groove, 21. needle rod, 22. needle head, 211. needle butt, 212. raised part. DETAILED DESCRIPTION

[0014] The present invention will now be further described with reference to the accompanying drawings and specific embodiments.

[0015] refer to Figures 1-4 , the preferred double-sided knitting circular machine of the present invention comprises a needle cylinder 1, a knitting needle 2 arranged in the insert slot of the needle cylinder 1, the knitting needle 2 comprises a needle bar 21 and a needle head 22, a needle butt 211 is provided on one side of the needle bar 21, and a V-shaped detour section of the needle bar 21 located between the needle butt 211 and the needle head 22 is provided with a protrusion 212 protruding toward the needle cylinder 1, the protrusion 212 of the needle bar 21 is a V-shaped detour protrusion bent from the side where the needle butt 211 is provided to the opposite side, and the side of the protrusion 212 facing the needle cylinder 1 is arc-shaped, the bottom 11 of the nozzle groove of the needle cylinder 1 is a dovetail-shaped nozzle groove bottom higher than the needle bottom 12, and the needle bottom 1 of the needle cylinder 1 2 is inclined from one end away from the nozzle groove toward the bottom 11 of the nozzle groove, and the needle cylinder 1 is provided with a first annular oil-breaking groove 13 below the nozzle, and a detachable oil-absorbing ring 3 is embedded in the first annular oil-breaking groove 13. The surface of the oil-absorbing ring 3 is higher than the groove of the first annular oil-breaking groove 13, and the oil-absorbing ring 3 is a graphene-based sponge. The side of the oil-absorbing ring 3 facing the knitting needle 2 contacts the raised portion 212 of the knitting needle 2 to block and absorb the knitting oil driven by the knitting needle 2 during the needle-lifting stage. The needle cylinder 1 is further provided with a second annular oil-breaking groove 14 below the first annular oil-breaking groove 13, and the second annular oil-breaking groove 14 cooperates with the knitting needle 2 to block the knitting oil driven by the knitting needle 2 during the needle-lifting stage.

[0016] The needle cylinder 1 may also be provided with an oil drain groove 15, which is connected to the first annular oil-breaking groove 13 and the second annular oil-breaking groove 14 respectively and discharges the knitting oil blocked in the first annular oil-breaking groove 13 and the second annular oil-breaking groove 14. The knitting oil discharged by the oil drain groove 15 can be recycled and reused.

[0017] In the above embodiment, the surface of the oil suction ring can also be flush with the notch of the first annular oil-breaking groove. The oil suction ring can also be made of a material such as oil-absorbing cotton that effectively absorbs knitting oil. The raised portion of the needle bar can also consist of a raised portion protruding only on the side facing the needle cylinder. The side of the raised portion facing the needle cylinder can be an arc-shaped raised portion to reduce friction between the needle and the needle cylinder. The oil drain groove is also optional; its provision facilitates the recovery and reuse of knitting oil.

[0018] Although the present invention has been particularly shown and described in conjunction with preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made to the present invention without departing from the spirit and scope of the invention as defined in the appended claims, and all such changes are within the scope of protection of the present invention.

Claims

1. A double-sided circular knitting machine, comprising a needle cylinder, a knitting needle disposed in a slot in the needle cylinder, the knitting needle comprising a needle shank and a needle head, a needle butt being provided on one side of the needle shank, characterized in that: The needle rod is located in a V-shaped winding section between the needle butt and the needle head and is provided with a protrusion protruding toward the needle cylinder. The needle cylinder is provided with a first annular oil-breaking groove below the nozzle. A detachable oil suction ring is embedded in the first annular oil-breaking groove. The side of the oil suction ring facing the knitting needle contacts the protrusion of the knitting needle to block and absorb the knitting oil driven by the needle thrust stage.

2. The double-sided circular knitting machine according to claim 1, characterized in that: The surface of the oil suction ring is higher than the notch of the first annular oil-breaking groove.

3. The double-sided circular knitting machine according to claim 2, characterized in that: The oil absorption ring is any one of graphene-based sponge or oil absorption cotton.

4. The double-sided circular knitting machine according to claim 1, characterized in that: The bottom of the nozzle groove of the syringe is a dovetail-shaped nozzle groove bottom that is higher than the needle bottom, and the needle bottom of the syringe is inclined from one end away from the nozzle groove toward the nozzle groove bottom.

5. The double-sided circular knitting machine according to claim 1, characterized in that: The needle cylinder is located below the first annular oil-breaking groove and is further provided with a second annular oil-breaking groove. The second annular oil-breaking groove cooperates with the knitting needle to block the knitting oil driven by the knitting needle in the needle-lifting stage.

6. The double-sided circular knitting machine according to claim 5, characterized in that: The needle cylinder is further provided with an oil drain groove, which is communicated with the first annular oil-breaking groove and the second annular oil-breaking groove respectively and discharges the knitting oil blocked in the first annular oil-breaking groove and the second annular oil-breaking groove.

7. The double-sided circular knitting machine according to claim 1, characterized in that: The raised portion of the needle bar is a V-shaped winding raised portion that bends from the side where the needle butt is provided to the opposite side.

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