A groove needle core descending type pressure-deficient knitting mechanism for warp knitting machine

Abstract

The present invention relates to a groove needle core descending type pressure-deficient knitting mechanism for a warp knitting machine, comprising a jacquard device, a needle core, a needle core groove and a needle body, wherein the needle core groove is arranged on a needle core driving mechanism, the needle core is arranged vertically in the needle core groove, a reset spring is arranged between the bottom of the needle core and the needle core groove, the needle core driving mechanism is used to drive the needle core to move up and down to open or close the needle opening, the jacquard device is arranged on the side of the needle core groove, the jacquard device is used to block the needle core from moving up when pressure-deficient knitting is required, so that the needle opening of the needle body remains in an open state, and to release the blocking of the needle core when pressure-deficient knitting is not required, so that the needle core can move up under the drive of the needle core groove to close the needle opening. The present invention changes the knitting of the warp knitting pressure-deficient organization from the original single crochet warp knitting machine knitting to the knitting of the groove needle warp knitting machine, and through the jacquard device and the separated needle core, independent pressure-deficient knitting at each knitting point can be achieved, so that warp knitted fabrics of any color can be knitted according to needs.

Description

Technical Field

[0001] The invention relates to the field of pressure-deficient fabric knitting equipment, and in particular to a groove needle core descending type pressure-deficient knitting mechanism for a warp knitting machine. Background Art

[0002] Traditionally, the only way to knit a warp knitting fabric without pressure is to use a crochet warp knitting machine equipped with a pattern pressing plate. Because there is a pressing plate in the loop forming mechanism of the crochet warp knitting machine, its function is to close the needle hole and knit the loop by pressing the needle. When the flat pressing plate is replaced with a pattern pressing plate, the concave and convex structure distributed according to a certain rule on the pattern pressing plate forms a pattern change by pressing the needle or not pressing the needle. The convex part of the pressing plate still closes the needle hole to form a normal loop, while the concave part of the pressing plate cannot close the needle hole, thus forming a lack of pressure tucking or lack of pressure jacquard effect. Whether the pressing plate is closed and whether the hook is padding the new yarn can form four effects when weaving the fabric: ① The hook pads the new yarn and the pressing plate presses the needle at the same time, there is only new yarn in the needle hook, and a normal coil is woven on the fabric; ② The hook pads the new yarn and the pressing plate does not press the needle, there are both new yarn and old coils in the needle hook, and a tuck coil (stretched coil + hanging arc) is woven on the fabric, that is, a lack of pressure tuck organization; ③ The hook does not pad the yarn and the pressing plate does not press the needle, there are only old coils in the needle hook, and a stretched coil is woven on the fabric, that is, a lack of pressure jacquard organization; ④ The hook does not pad the yarn but the pressing plate presses the needle, there is neither new yarn nor old coil in the needle hook, and a missing stitch defect is woven on the fabric. The first three types of weaving can be combined according to certain rules to form a lack of pressure jacquard or tuck warp knitted fabric. The fourth type of weaving has a missing stitch defect that we need to try to avoid.

[0003] The main innovative research direction of people in the weaving of warp knitting with insufficient pressure is to improve the control technology of the pattern pressing plate: ① The pattern pressing plate has the function of horizontal movement while pressing the needle; ② The pattern pressing plate has the function of intermittent movement to cooperate with the flat pressing plate; ③ Multiple pattern pressing plates have the function of changing control. However, no matter which form of change is adopted, these research directions are inseparable from the pattern pressing plate, and can only control the pattern mechanically, but cannot realize the design of the pattern by electronic single-selection needle.

[0004] Crochet warp knitting machines are obsolete models. The knitting movement of the crochet machine controlled by the pressure plate has inherent deficiencies: ① The crochet needle relies on the pressure plate to close the needle mouth when the mouth is closed. The pressure plate acts on the knitting needle in the vertical direction of the crochet needle's descending movement. When the knitting needle descends, the friction of the pressure plate generates heat, which is very easy to damage the needle and is not conducive to high speed; ② The structure of the crochet needle requires two upward movements during the looping process, which increases the range of the crochet needle's looping movement, which is also not conducive to high speed; ③ In order to weave the warp knitting structure without pressure, the pressure plate needs to be transformed into a flower pressure plate according to the pattern requirements, and other mechanisms must also be changed accordingly, and the operation process is complicated. Because the flower shape is mechanically controlled, the above mechanisms must be adjusted greatly when changing the pattern effect, and the operation is complicated. These are the fundamental reasons why the crochet warp knitting machine tends to be eliminated.

[0005] At present, in the design and weaving production market of other pattern structures, crochet warp knitting machines have long been eliminated and completely replaced by groove needle warp knitting machines. The only field that still has a place in the field of low-pressure warp knitting fabrics that require pattern pressure plates to control the weaving is that no other machine type can compete with it. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a groove needle core descending type pressure-deficient knitting mechanism for a warp knitting machine in view of the above problems and requirements.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0008] A groove needle core descending type low-pressure weaving mechanism for a warp knitting machine comprises a jacquard device, a needle core, a needle core groove and a needle body, wherein the needle core groove is arranged on a needle core driving mechanism, and the needle core is vertically arranged in the needle core groove, and a reset spring is arranged between the bottom of the needle core and the needle core groove, and the needle core driving mechanism is used to drive the needle core to move up and down by driving the needle core groove to open or close the needle mouth of the needle body, and the jacquard device is arranged on the side of the needle core groove, and the jacquard device is used to block the needle core from moving up when low-pressure weaving is required, so that the needle mouth of the needle body remains in an open state, and release the obstruction to the needle core when low-pressure weaving is not required, so that the needle core can move up driven by the needle core groove to close the needle mouth.

[0009] Furthermore, the return spring is vertically arranged between the bottom of the needle core and the bottom of the needle core groove.

[0010] Furthermore, in the same row of needle cores, the return springs at the bottoms of two adjacent needle cores are respectively located at the left and right ends of the bottoms of the needle cores.

[0011] Furthermore, a needle core cover plate can be detachably provided on the needle core driving mechanism, and the needle core cover plate is used to limit the extreme position of the needle core moving upward.

[0012] Furthermore, the Jacquard device includes a translation mechanism and a forked rigid body, the translation mechanism is used to drive the forked rigid body to move back and forth in a horizontal direction, and a needle butt is provided on the side of the needle core close to the Jacquard device. When the forked rigid body is extended, it is located directly above the needle butt and can block the needle core from moving up and down with the needle core driving mechanism. When the forked rigid body is retracted, it is located on the side of the needle butt and has no contact with the needle core during the movement of the needle core.

[0013] After adopting the above technical solution, the present invention has the following advantages compared with the prior art:

[0014] The present invention changes the weaving of warp knitted lack-pressure structure from the original only crochet warp knitting machine to groove needle warp knitting machine, thus eliminating the backward crochet warp knitting machine and expanding the fabric range of groove needle warp knitting machine; through the jacquard device and the separate needle core, independent lack-pressure knitting at each knitting point can be achieved, so warp knitted fabrics of any color can be knitted according to needs, and electronic needle selection for lack-pressure warp knitting structure is realized, and then matched with jacquard electronic yarn guide needle selection, lack-pressure electronic needle selection + jacquard electronic combing CAD design, so that the warp knitting colors are richer.

[0015] The present invention is described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present application when weaving under pressure;

[0017] Figure 2 It is a schematic diagram of the structure of the present application during normal weaving;

[0018] Figure 3 Schematic diagram of the structure of different installation positions of the return spring.

[0019] 1. Needle core; 2. Needle body; 3. Reset spring; 4. Needle core cover; 5. Translation mechanism; 6. Forked rigid body; 7. Needle core groove DETAILED DESCRIPTION

[0020] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0021] To achieve the knitting of under-pressure warp knitted fabrics, two problems must be solved: ① Whether to pad yarn; ② Whether to close the mouth. ① Whether to pad yarn is related to threading yarn. You can not thread yarn in the yarn guide needle (similar to crochet warp knitting machine) or use jacquard yarn guide needle without padding yarn; ② Whether to close the mouth, on the groove needle warp knitting machine, it is to control the rising movement of the needle core. The needle mouth is closed when the needle core rises, and it will not be closed if the needle core does not rise or does not rise to the right position.

[0022] Let's take the loop forming mechanism of a groove needle warp knitting machine as an example. To achieve the control of the needle core rising or not rising, the needle core cannot be a cast whole but must be a separate structure and there must be a needle core groove to place the needle core for easy control of the needle core rising and falling. In order to allow more placement space for the needle core and its attached control mechanism, the needle body that coordinates with the needle core is preferably a cast structure: ① reduce the placement space of the needle body, ② make the needle body uniform and stable in structure.

[0023] From the motion curve of the loop-forming parts of the groove-needle warp knitting machine, it can be seen that the normal movement of the needle core is to rise and close the needle mouth. To achieve pressure-deficient knitting without rising or closing the needle core, the following should be done: ① Although the needle core rises, the needle body begins to descend and the needle core descends in advance (descends during the period of 240° to 350° of the main shaft), so that the needle core is always in the needle body and does not close, so that the old coil can return to the needle hook again to achieve pressure-deficient knitting; ② The needle core is always in the needle body and does not rise or close, which is equivalent to the needle core not rising and closing the needle mouth during the period of 100° to 350° of the main shaft, and also enables the old coil to return to the needle hook again to achieve pressure-deficient knitting.

[0024] Therefore, the method adopted by the present invention is to use the device of the present application at each knitting point, configure a corresponding jacquard device for each needle core, and realize independent pressure-deficient knitting for each knitting point. When the knitting point needs pressure-deficient knitting, the jacquard device is controlled to extend to block the needle core. When the knitting point needs normal knitting, the jacquard device is controlled to retract to release the blockage of the needle core. By independently controlling each knitting point, it is possible to weave pressure-deficient fabrics of various colors as needed.

[0025] The groove needle core descending type pressure-deficient knitting mechanism for a warp knitting machine of the present invention can be installed on a loop forming mechanism of a groove needle warp knitting machine, and other components such as a sinker and a yarn guide needle are consistent with those of a traditional groove needle warp knitting machine.

[0026] ① Needle body: The needle body 2 is cast into one piece by casting, and the lower part of the needle body is connected to the main shaft through the needle body eccentric connecting rod mechanism;

[0027] ② Needle core: The middle and lower part of the needle core 1 is inserted into the needle core groove 7, and the bottom of the needle core is inserted on the reset spring 3 in the needle core groove. Considering that the distance between the two needle cores is close when the machine number is high, the spring in the needle core groove is not easy to process and assemble. Figure 2-3 As shown, the needle core is divided into two structures, odd and even, and the reset springs are staggered at both ends of the bottom of the needle core; the needle core is fixed by the needle core cover plate 4 above the middle bend of the needle core. When the needle core needs to be replaced, loosen the screw to move the needle core cover plate to the right of the figure, release the limit on the needle core, and the needle core can be taken out for replacement. The needle core cover plate is moved to the left of the figure and the screw can be tightened to fix the needle core in place.

[0028] like Figure 2 As shown, when the knitting point does not need to be knitted under pressure, the translation mechanism is retracted, the forked rigid body does not contact the needle butt, and the needle core moves upward under the drive of the needle core driving mechanism to close the needle opening;

[0029] like Figure 1As shown, when the knitting point needs to be knitted under low pressure, the translation mechanism 5 is extended, and the forked rigid body 6 is located directly above the needle butt. The needle core does not move up with the needle core driving mechanism, so that the needle mouth remains normally open, and the old coil is withdrawn from the needle rod of the needle body into the needle hook again to form a lack of pressure. When the offset jacquard forked rigid body is reset, the spring at the bottom of the needle core groove causes the needle core to rise and reset to close the needle mouth, while the needle core that is not affected descends normally to close the needle mouth, causing the old coil to be unhooked and formed into a circle.

[0030] When it is necessary to switch to the normal state, the translation mechanism is retracted, the needle core returns to its original position under the action of the reset spring, and the needle opening is closed under the drive of the needle core driving mechanism.

[0031] The above is an example of the best implementation of the present invention, and the parts not described in detail are common knowledge of ordinary technicians in the field. The protection scope of the present invention shall be based on the content of the claims, and any equivalent transformation based on the technical enlightenment of the present invention is also within the protection scope of the present invention.

Claims

1. A groove needle core descending type pressure-deficient knitting mechanism for a warp knitting machine, characterized in that: The invention comprises a jacquard device, a needle core (1), a needle core groove (7) and a needle body (2), wherein the needle core groove (7) is arranged on a needle core driving mechanism, the needle core (1) is vertically arranged in the needle core groove (7), a return spring (3) is arranged between the bottom of the needle core (1) and the needle core groove (7), the needle core driving mechanism is used to drive the needle core (1) to move up and down by driving the needle core groove (7), so that the needle opening of the needle body (2) is opened or closed, the jacquard device is arranged on the side of the needle core groove (7), the jacquard device is used to block the needle core (1) from moving up when low-pressure knitting is required, so that the needle opening of the needle body (2) remains in an open state, and release the blocking of the needle core (1) when low-pressure knitting is not required, so that the needle core (1) can move up under the drive of the needle core groove (7) to close the needle opening; The return spring (3) is vertically arranged between the bottom of the needle core (1) and the bottom of the needle core groove (7); In the same row of needle cores (1), the return springs (3) at the bottoms of two adjacent needle cores (1) are respectively located at the left and right ends of the bottom of the needle cores (1); The needle core driving mechanism is detachably provided with a needle core cover plate (4), and the needle core cover plate (4) is used to limit the upper limit position of the needle core (1); The Jacquard device comprises a translation mechanism (5) and a forked rigid body (6), wherein the translation mechanism (5) is used to drive the forked rigid body (6) to move forward and backward in a horizontal direction, and a needle butt is arranged on the side of the needle core (1) close to the Jacquard device. When the forked rigid body (6) is extended, it is located directly above the needle butt and can prevent the needle core (1) from moving up and down with the needle core driving mechanism. When the forked rigid body (6) is retracted, it is located on the side of the needle butt and has no contact with the needle core (1) during the movement of the needle core (1).

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