Double knit circular weft machine

Abstract

The present application relates to the technical field of knitting, and provides a double-sided knitting circular weft machine, which comprises a needle cylinder and knitting needles arranged in the needle cylinder insertion piece groove, wherein the knitting needle comprises a needle stem and a needle head, a needle butt is arranged on one side of the needle stem, a protruding part protruding towards the needle cylinder is arranged on a V-shaped detour section between the needle butt and the needle head, a first annular oil breaking groove is arranged below the needle cylinder, a detachable oil absorption ring is embedded in the first annular oil breaking groove, and the side of the oil absorption ring facing the knitting needle is in contact with the protruding part of the knitting needle to block and absorb the knitting oil driven by the knitting needle in the lifting stage. The present application solves the problem that the knitting oil driven by the knitting needle in the lifting stage invades the weaving area to pollute the fabric and form white oil needle on the existing knitting circular weft machine.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of knitting, in particular to a double-sided circular weft knitting machine. BACKGROUND

[0002] In the production process of the circular weft knitting machine, the knitting needle makes forward and backward high-speed movement in the needle groove, and also makes circumferential movement with the needle cylinder (or needle disc). Friction will occur between the knitting needle and the wall of the needle groove. In order to reduce the friction, knitting oil needs to be continuously and automatically added during the work process. At this time, the oil film formed by the knitting oil can play the following roles: reducing the surface friction coefficient between the knitting needle, the needle cylinder and the cam, reducing the friction resistance, and playing a lubricating role; reducing the degree of wear and tear, prolonging the service life of the knitting needle, the needle cylinder and the cam; reducing the heat generated by friction when each part moves, so that the circular weft knitting machine is kept within the appropriate movement temperature. Knitting oil is indispensable when the circular weft knitting machine produces fabrics. However, in the weaving process, when a certain amount of knitting oil enters the knitting area through the knitting needle or the sinker and is attached to the yarn and woven into the fabric, longitudinal continuous or intermittent whitish or blackish oil stain strips will be formed on the surface of the fabric. The industry habitually calls such oil stain strips oil needle (oil path). Especially in the case of fine needle spacing, high stitch number and large cylinder diameter of the needle cylinder of the current circular weft knitting machine, the heat and temperature rise generated by the surface friction between the knitting needle, the needle cylinder and the cam are large, the viscosity coefficient of the knitting oil is low, and it is not easy to adhere to the needle rod and the wall of the needle groove. The fluidity is large, and due to the operation of the circular weft knitting machine, the oil adhering to the needle groove of the needle disc and the knitting needle heel is thrown outward in the radial direction under the action of centrifugal force and reaches the needle hook and the nozzle part of the needle cylinder, thereby bringing the knitting oil into the fabric and causing oil needle. Under normal circumstances, knitting oil has good affinity with metal. When the knitting needle and the sinker reciprocate in the oil-containing needle groove, due to the micro concave-convex unevenness on the surface, the knitting oil will always be taken to the oil-free or low-oil area. Once the oil taken to the knitting area contacts the yarn, it will be absorbed by the yarn and woven into the fabric together. Subsequent knitting oil continues to be taken to this area and is also woven into the fabric, thereby forming the weaving defect of oil needle. The "white oil needle" is a weaving defect that is difficult to completely overcome. The "white oil needle" is a longitudinal strip-shaped defect formed by the pollution of knitting oil during the weaving of the circular weft knitting machine. The longitudinal white oil stain strip is continuously or intermittently distributed.

[0003] For example, Chinese patent document CN202220484212.1 discloses a cylinder structure for an oil-resistant needle and a circular knitting machine. This cylinder structure includes a cylinder and a sinker. The cylinder has several grooves at the opening, and the sinker is inserted into or removed from these grooves. The key feature is that the cylinder has a slit annular groove around its outer wall, located at the junction of the bottom surface of the groove and the outer wall of the cylinder, forming an outward-facing and downward-sloping guide slope. This guide slope forms an obtuse angle with the bottom surface of the groove. The obtuse angle at the edge of the groove's bottom surface significantly reduces friction between the edge of the groove and the bottom edge of the sinker, greatly reducing debris accumulation and preventing black oil buildup. Therefore, the circular knitting machine does not produce black oil after prolonged operation, thus preventing black oil from contaminating the needles and spreading to the fabric, thus avoiding the problem of oily needles. While the aforementioned patents can solve the problem of black oil needles in circular knitting machines, they do not offer an effective solution for white oil needles. Existing technologies can only reduce the problem of white oil needles by using an oil-cutting groove in conjunction with short-term cleaning. Therefore, the formation of white oil needles due to knitting oil invading the knitting area during the needle-pressing stage of existing circular knitting machines is a technical problem that urgently needs to be solved. Summary of the Invention

[0004] Therefore, in view of the above problems, the present invention proposes a double-sided circular knitting machine, which effectively prevents knitting oil from being driven into the knitting area by the reciprocating motion of the knitting needles and centrifugal force during knitting, thereby improving fabric quality, facilitating maintenance and use, and extending the cycle of cleaning required.

[0005] To solve this technical problem, the present invention adopts the following solution: a double-sided circular knitting machine, comprising a cylinder and knitting needles disposed in the insert slot of the cylinder. The knitting needles include a needle bar and a needle head. A needle heel is provided on one side of the needle bar. A V-shaped section of the needle bar between the needle heel and the needle head is provided with a protrusion protruding towards the cylinder. The cylinder is provided with a first annular oil-cutting groove below the nozzle. A detachable oil-absorbing ring is embedded in the first annular oil-cutting groove. The side of the oil-absorbing ring facing the knitting needle contacts and cooperates with the protrusion of the knitting needle to block and absorb the knitting oil driven by the needle during the needle-pressing stage.

[0006] Furthermore, the surface of the oil suction ring is higher than the opening of the first annular oil cut-off groove.

[0007] Furthermore, the oil-absorbing ring is either a graphene-based sponge or oil-absorbing cotton.

[0008] Furthermore, the nozzle groove bottom 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 the end away from the nozzle groove towards the nozzle groove bottom.

[0009] Further, the needle cylinder located below the first annular oil blocking groove is also provided with a second annular oil blocking groove, and the second annular oil blocking groove is matched with the needle to block the needle knitting oil driven by the needle lifting phase.

[0010] Further, the needle cylinder is also provided with an oil discharge groove in communication with the first annular oil blocking groove and the second annular oil blocking groove to discharge the blocked needle knitting oil in the first annular oil blocking groove and the second annular oil blocking groove.

[0011] Further, the protruding part of the needle rod is a V-shaped detour protruding part curved from one side provided with a needle butt to the opposite side.

[0012] By adopting the foregoing technical scheme, the present application has the beneficial effects that: by arranging the protruding part on the side of the needle rod away from the needle butt and arranging the first annular oil blocking groove below the mouth groove of the needle cylinder, the excess needle knitting oil accumulated in the plug-in piece groove in the needle lifting phase is blocked and adsorbed by the contact and cooperation between the oil absorbing ring embedded on the first annular oil blocking groove and the protruding part at the V-shaped detour of the needle rod, so that the needle knitting machine effectively blocks the needle knitting oil from being driven by the needle to invade the knitting area during knitting, effectively solves the problem of fabric pollution caused by the needle knitting oil during loop formation, solves the problem of "white oil needle", improves the fabric quality, and only needs to replace the oil absorbing ring by disassembling the needle during maintenance. The oil absorbing ring is recycled for multiple times after draining and drying, has low cost and is convenient to maintain, and prolongs the period of cleaning the machine. The surface of the oil absorbing ring is higher than the groove of the first annular oil blocking groove, which can effectively ensure that the protruding part of the needle rod blocks and adsorbs the needle knitting oil during cooperation with the oil absorbing ring to prevent the influence of excessive needle knitting oil caused by negligence or improper control. The bottom of the mouth groove of the needle cylinder is a swallow tail type mouth groove bottom higher than the needle bottom, which is matched with the needle bottom inclined from the end away from the mouth groove to the direction of the mouth groove bottom, can block the residual needle knitting oil again and make the needle knitting oil flow into the first annular oil blocking groove, prevents the needle knitting oil from flowing out to the knitting area, and blocks the needle knitting oil and dirt in the plug-in piece groove driven by the needle lifting in advance by arranging the second annular oil blocking groove, reduces the friction with the needle and the needle knitting oil, forms multiple blocking by cooperating with the first annular oil blocking groove, effectively avoids the needle knitting oil from flowing out to the knitting area, avoids the appearance of white oil needle, improves the fabric quality, reduces the problem of oil removal in the dyeing and finishing process, reduces the production cost, and can be widely applied. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a partial structure schematic diagram of an embodiment of the present application;

[0014] Figure 2 is a partial structure schematic diagram of another state of an embodiment of the present application;

[0015] Figure 3 is a structure schematic diagram of a needle in an embodiment of the present application;

[0016] Figure 4Figure is a part of the sectional structure of the needle cylinder in the embodiment of the present application.

[0017] In the figure, 1. needle cylinder, 2. knitting needle, 3. oil suction ring, 11. mouth slot bottom, 12. needle bottom, 13. first annular oil breaking groove, 14. second annular oil breaking groove, 15. oil discharge groove, 21. needle stem, 22. needle head, 211. needle butt, 212. protruding part. DETAILED DESCRIPTION

[0018] The present application will be further described in conjunction with the drawings and specific embodiments.

[0019] Reference Figures 1-4 , preferably the double-sided circular weft knitting machine of the present application, comprising a needle cylinder 1, knitting needles 2 arranged in the insertion piece slot of the needle cylinder 1, the knitting needles 2 comprising a needle stem 21 and a needle head 22, the needle stem 21 being provided with a needle butt 211 on one side, a protruding part 212 being arranged on the V-shaped detour between the needle butt 211 and the needle head 22, the protruding part 212 of the needle stem 21 being a V-shaped detour protruding part bending from the side provided with the needle butt 211 to the opposite side, the side of the protruding part 212 facing the needle cylinder 1 being arc-shaped, the mouth slot bottom 11 of the mouth slot of the needle cylinder 1 being a dovetail-shaped mouth slot bottom higher than the needle bottom 12, the needle bottom 12 of the needle cylinder 1 being inclined from the end away from the mouth slot towards the direction of the mouth slot bottom 11, the needle cylinder 1 being provided with a first annular oil breaking groove 13 below the mouth slot, the first annular oil breaking groove 13 being embedded with a detachable oil suction ring 3, the surface of the oil suction ring 3 being higher than the groove of the first annular oil breaking groove 13, the oil suction ring 3 being a graphene-based sponge, the side of the oil suction ring 3 facing the knitting needle 2 being in contact with the protruding part 212 of the knitting needle 2 to block and adsorb the knitting oil driven by the knitting needle 2 in the needle lifting stage, the needle cylinder 1 being 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 being in cooperation with the knitting needle 2 to block the knitting oil driven by the knitting needle 2 in the needle lifting stage.

[0020] The needle cylinder 1 can be further provided with an oil discharge groove 15, the oil discharge groove 15 being in communication with the first annular oil breaking groove 13 and the second annular oil breaking groove 14 respectively and discharging the blocked knitting oil in the first annular oil breaking groove 13 and the second annular oil breaking groove 14, the knitting oil discharged by the oil discharge groove 15 being recyclable.

[0021] The surface of the oil suction ring in the above embodiment can also be flush with the groove of the first annular oil breaking groove, the oil suction ring can also be made of oil-absorbing cotton and other materials that can effectively adsorb knitting oil. The protruding part of the needle stem can also be a protruding part protruding only from the side facing the needle cylinder, and the side of the protruding part facing the needle cylinder can be an arc-shaped protruding part to reduce the friction between the knitting needle and the needle cylinder. The oil discharge groove can also not be provided, and the oil discharge groove is provided to facilitate the recycling of the knitting oil.

[0022] Although the present application has been particularly shown and described with respect to preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details can be made therein without departing from the spirit and scope of the application as defined in the appended claims.

Claims

1. A double-sided circular knitting machine, comprising a cylinder and knitting needles disposed in a slot in the cylinder insert, wherein the knitting needles include a needle bar and a needle head, and a needle heel is provided on one side of the needle bar, characterized in that: The needle bar has a V-shaped section between the needle heel and the needle tip with a protrusion facing the needle barrel. The needle barrel has a first annular oil-cutting groove below the nozzle. A detachable oil-absorbing ring is embedded in the first annular oil-cutting groove. The side of the oil-absorbing ring facing the knitting needle contacts and cooperates with the protrusion of the knitting needle to block and absorb the knitting oil driven by the needle during the needle-pressing 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 opening of the first annular oil cut-off groove.

3. The double-sided circular knitting machine according to claim 2, characterized in that: The oil-absorbing ring is either a graphene-based sponge or oil-absorbing cotton.

4. The double-sided circular knitting machine according to claim 1, characterized in that: The nozzle groove bottom 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 the end away from the nozzle groove towards 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-cutting groove and is also provided with a second annular oil-cutting groove. The second annular oil-cutting groove works with the knitting needle to block the knitting oil driven by the needle during the needle-pressing stage.

6. The double-sided circular knitting machine according to claim 5, characterized in that: The syringe is also provided with an oil drain groove, which is connected to the first annular oil cut-off groove and the second annular oil cut-off groove respectively, and drains the knitting oil blocked in the first annular oil cut-off groove and the second annular oil cut-off groove.

7. The double-sided circular knitting machine according to claim 1, characterized in that: The protrusion of the needle bar is a V-shaped, meandering protrusion that bends from the side where the needle heel is located to the opposite side.

Images