Circular knitting machine for knitting double-sided yarn-dyed fabric

Abstract

A circular knitting machine for knitting a double-sided yarn-dyed fabric comprises a needle cylinder, a needle dial, a needle cylinder cam group, a needle dial cam group, at least one yarn feeding nozzle and at least one needle selector. The needle cylinder comprises a plurality of first knitting needles, the needle dial comprises a plurality of second knitting needles, the first knitting needles are knitted to form the front face of the double-face yarn-dyed fabric, and the second knitting needles are knitted to form the back face of the double-face yarn-dyed fabric. The at least one yarn feeding nozzle feeds a first dyed yarn and a second dyed yarn. Each first knitting needle of the first knitting needles is provided with a first track and a second track, each first knitting needle of the first knitting needles only hooks the first color yarn to form a loop in the first track, and each first knitting needle of the first knitting needles only hooks the second color yarn to form a loop in the second track. And each second knitting needle in the second knitting needles is guided by the needle disc cam group to only have a single track, and hooks the first dyed yarn and the second dyed yarn to form a loop.

Description

Technical Field

[0001] This invention provides a circular knitting machine, particularly a circular knitting machine for knitting double-sided colored fabrics. Background Technology

[0002] Patents from Taiwan, including TWI852480B, TWI836922B, TWI831107B, TWI724452B, TWI608140B, and JP6562890B2, disclose the production of yarn-dyed fabrics using circular knitting machines. However, these patents reveal that the front yarn loops of existing yarn-dyed fabrics are formed by knitting a face yarn and a ground yarn together. The shape of the front yarn loops is altered by changing the relative positions of the face yarn and the ground yarn, thus achieving color change. While this method achieves color change, because the face yarn and ground yarn only change their relative positions, when visually inspecting the front yarn loops, another element (the face yarn is colored, and the ground yarn is the other) can still be seen, resulting in impure color development of the front yarn loops. Furthermore, when observing the yarn-dyed fabric as a whole, the pattern composed of multiple front yarn loops appears blurry. Summary of the Invention

[0003] The main objective of this invention is to solve the problem that the color development of the front yarn loops in common yarn-dyed fabrics is easily affected by the yarns knitted together rather than the main color-developing yarns, resulting in impure color development.

[0004] To achieve the above objectives, the present invention provides a circular knitting machine for knitting double-sided yarn-dyed fabrics. The circular knitting machine includes a cylinder, a needle plate, a cylinder bevel assembly, a needle plate bevel assembly, at least one yarn feeder, and at least one needle selector. The cylinder includes a plurality of first needles guided by the cylinder bevel assembly, and the needle plate includes a plurality of second needles guided by the needle plate bevel assembly. These first needles knit multiple front loops of the double-sided yarn-dyed fabric, and these second needles knit multiple back loops of the double-sided yarn-dyed fabric. The at least one yarn feeder feeds in a first colored yarn and a second colored yarn. Each of these first knitting needles has a first track and a second track that partially overlaps with the first track. Each of these first knitting needles hooks only the first colored yarn in the first track to form one of the front yarn loops. Each of these first knitting needles hooks only the second colored yarn in the second track to form one of the front yarn loops. Each of these second knitting needles, guided by the needle bevel group, has only a single track. Each of these second knitting needles hooks both the first and second colored yarns to form one of the back yarn loops. The at least one needle selector is used to control the movement of these first knitting needles along the first track or the second track.

[0005] In one embodiment, each of the first needles has a third track that does not emerge from the needle and hooks either the first yarn or the second yarn, and the at least one needle selector controls the first needles to move in one of the following: the first track, the second track, and the third track.

[0006] In one embodiment, the first track includes a first exit segment, a first take-off segment following the first exit segment, a holding segment following the first take-off segment, and a looping segment following the holding segment. The second track includes the first exit segment, the first take-off segment, a second exit segment following the first take-off segment, a second take-off segment following the second exit segment, and the looping segment following the second take-off segment. When each of the second needles takes off to form a loop, one of the first needles adjacent to and capable of cooperating to produce a knitting action moves within the looping segment of the first track or the second track.

[0007] In one embodiment, the at least one yarn feeding nozzle has a first yarn feeding hole through which the first colored yarn passes and a second yarn feeding hole through which the second colored yarn passes, and the imaginary plane in which the first yarn feeding hole is located intersects with the imaginary plane in which the second yarn feeding hole is located.

[0008] Compared to common techniques, the present invention has the following characteristics when implemented through the aforementioned techniques: each of the first knitting needles of the present invention has the first track and the second track; each of the first knitting needles only hooks the first colored yarn in the first track to form one of the front yarn loops; each of the first knitting needles only hooks the second colored yarn in the second track to form one of the front yarn loops; each of the second knitting needles is guided by the needle plate corner group and has only a single track; each of the second knitting needles hooks both the first colored yarn and the second colored yarn to form one of the back yarn loops. The color of the front side of the double-sided yarn-dyed fabric knitted by the circular knitting machine of the present invention is produced by a single-color yarn. This is because each of the front yarn loops used to form the front side has only a single-color yarn. Compared with the common implementation of color-changing loops by changing the position of the face yarn and the ground yarn in yarn-dyed fabrics, the color of each front yarn loop in the front side of the double-sided yarn-dyed fabric of the present invention is purer, which improves the clarity of each color block on the front side of the double-sided yarn-dyed fabric. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of an embodiment of the circular knitting machine of the present invention.

[0010] Figure 2 This is a schematic diagram of the structure of an embodiment of the double-sided yarn-dyed fabric of the present invention.

[0011] Figure 3 This is a schematic diagram of the trajectories of the first knitting needle of the present invention.

[0012] Figure 4 This is a schematic diagram illustrating the implementation of the first knitting needle moving along a first trajectory according to the present invention.

[0013] Figure 5 This is a schematic diagram illustrating the implementation of the first knitting needle of the present invention moving along a second trajectory. Detailed Implementation

[0014] The detailed description and technical content of the present invention will now be explained with reference to the accompanying drawings, as follows:

[0015] Please see Figure 1 This invention provides a circular knitting machine 20, which includes a cylinder 21 (also known as a lower needle bed), a needle plate 22 (also known as an upper needle bed), a cylinder bevel assembly 23, a needle plate bevel assembly 24, at least one yarn feed nozzle 25, and at least one needle selector 26. The cylinder 21 includes a plurality of first needles 211, which are guided by the cylinder bevel assembly 23 to perform a looping motion. Each of the first needles 211 can only produce a uniaxial reciprocating motion. The needle plate 22 includes a plurality of second needles 221, which are guided by the needle plate bevel assembly 24 to perform a looping motion. Each of the second needles 221 can only produce a uniaxial reciprocating motion, and the axial movement of each of the second needles 221 is perpendicular to the axial movement of one of the first needles 211. At least one needle selector 26 is used to determine the trajectory of these first needles 211 moving on the cylinder corner group 23.

[0016] Please see Figure 2The circular knitting machine 20 of the present invention is used to knit a double-sided colored fabric 40. The front side 41 of the double-sided colored fabric 40 can be colored by yarn loops. The double-sided colored fabric 40 includes a plurality of front yarn loops 42 and a plurality of back yarn loops 43. The first needles 211 of the cylinder 21 of the present invention are used to form the front yarn loops 42 of the double-sided colored fabric 40, and the second needles 221 of the needle plate 22 are used to form the back yarn loops 43 of the double-sided colored fabric 40. The at least one yarn feeder 25 feeds in a first colored yarn 44 and a second colored yarn 45, the colors of which can be different. It should be understood that when the at least one yarn feeding nozzle 25 of the present invention is configured in multiple ways, each of the multiple yarn feeding nozzles 25 feeds two colored yarns (e.g., the first colored yarn 44 and the second colored yarn 45). The colors of the yarns fed by the multiple yarn feeding nozzles 25 are not limited to being the same. In one embodiment, one of two adjacent yarn feeding nozzles 25 can feed two yarns of different colors, while the other adjacent yarn feeding nozzle can feed two other yarns of different colors. Thus, the front side of the double-sided yarn-dyed fabric 40 can produce four-color variations. Please refer to the accompanying documentation. Figures 3 to 5The needle cylinder bevel assembly 23 of the present invention enables the first knitting needles 211 to generate multiple tracks. Each of the first knitting needles 211 has a first track 31 and a second track 32, the second track 32 partially overlapping the first track 31. Both the first track 31 and the second track 32 include the action of hooking yarn into loops. Each of the first knitting needles 211 hooks only the first colored yarn 44 in the first track 31 to form one of the front yarn loops 42, and each of the first knitting needles 211 hooks only the second colored yarn 45 in the second track 32 to form one of the front yarn loops 42. The second knitting needles 221 are guided by the needle cylinder bevel assembly 24 and have only a single track. Each of the second knitting needles 221 hooks the first colored yarn 44 and the second colored yarn 45 during operation and simultaneously forms loops with the first colored yarn 44 and the second colored yarn 45. As previously described, each of the front yarn loops 42 of the double-sided yarn-dyed fabric 40 contains only a single-color yarn (either the first color yarn 44 or the second color yarn 45), while each of the back yarn loops 43 contains two color yarns (i.e., the first color yarn 44 and the second color yarn 45) fed in by the same feed nozzle 25. Furthermore, the color development of the front side of the double-sided yarn-dyed fabric 40 knitted by the circular knitting machine 20 of the present invention is produced by a single-color yarn. This is because each of the front yarn loops 42 used to form the front side has only a single-color yarn (either the first color yarn 44 or the second color yarn 45). Compared to the common implementation method of color-changing loops by changing the position of the face yarn and the ground yarn in yarn-dyed fabrics, the color of each of the front yarn loops 42 on the front side of the double-sided yarn-dyed fabric 40 of the present invention is purer, improving the clarity of each color block on the front side of the double-sided yarn-dyed fabric 40.

[0017] Please see Figures 3 to 5The first track 31 and the second track 32 will be further described. In one embodiment, the first track 31 includes a first exit section 331, a first take-off section 332 following the first exit section 331, a holding section 333 following the first take-off section 332, and a looping section 334 following the holding section 333. Furthermore, one of the first needles 211 moves along the first track 31. When one of the first needles 211 reaches the first take-off section 332, it has hooked onto the first colored yarn 44 and then enters the holding section 333. The first colored yarn 44 remains hooked by the hook of one of the first needles 211 until one of the first needles 211 moves to the looping section 334 of the first track 31. On the other hand, before explaining the second trajectory 32, it is necessary to understand that although the second colored yarn 45 and the first colored yarn 44 are supplied by the same yarn feeder 25, the slope of the second colored yarn 45 is different from that of the first colored yarn 44, thus resulting in different hooking positions. Continuing to describe the second trajectory 32, in this embodiment, the second trajectory 32 includes the first needle exit section 331, the first needle return section 332 continuing from the first needle exit section 331, a second needle exit section 335 continuing from the first needle return section 332, a second needle return section 336 following the second needle exit section 335, and a looping section 334 following the second needle return section 336. The second track 32 overlaps with the first track 31 at the first exit section 331 and the first take-off section 332. When one of the first needles 211 moves along the second track 32, it also hooks onto the first yarn 44 at the first take-off section 332. However, as one of the first needles 211 enters the second exit section 335, it releases the hook onto the first yarn 44. When one of the first needles 211 enters the second take-off section 336, it hooks onto the second yarn 45 and participates in knitting with the second yarn 45 in the looping section 334. Continuing on, when each of the second needles 221 takes off and loops, one of the first needles 211 that is adjacent to the second needle and can cooperate to produce a knitting action moves along the looping section 334 of the first track 31 or the second track 32.

[0018] Please see Figure 3In one embodiment, each of the first knitting needles 211 has a third track 34. When each of the first knitting needles 211 moves along the third track 34, it does not engage either the first colored yarn 44 or the second colored yarn 45. In this embodiment, the at least one needle selector 26 controls the first knitting needles 211 to move along one of the following: the first track 31, the second track 32, and the third track 34. The purpose of the third track 34 is that when the right side of the double-sided yarn-dyed fabric 40 is implemented with four colors, each of the plurality of yarn feeders 25 supplies only two of the colored yarns. Therefore, when the yarn supplied by the yarn feeder 25 is not required for the current knitting, at least one of the first knitting needles 211 currently corresponding to the yarn feeder 25 will not perform a looping action (i.e., will not engage, but will instead move along the third track 34).

[0019] Please see Figure 4 The at least one yarn feeding nozzle 25 has a first yarn feeding hole 251 and a second yarn feeding hole 252. The first yarn feeding hole 251 is threaded with the first colored yarn 44, and the second yarn feeding hole 252 is threaded with the second colored yarn 45. The imaginary plane 253 where the first yarn feeding hole 251 is located intersects with the imaginary plane 254 where the second yarn feeding hole 252 is located. By the different positions of the first yarn feeding hole 251 and the second yarn feeding hole 252, the paths of the first colored yarn 44 and the second colored yarn 45 do not overlap.

[0020] [Explanation of Diagram Symbols]

[0021] 20: Circular knitting machine

[0022] 21: Syringe

[0023] 211: First stitch

[0024] 22: Needle plate

[0025] 221: Second stitch

[0026] 23: Needle Corner Group

[0027] 24: Needle Plate Mountain Corner Group

[0028] 25: Feeding with a gauze mouthpiece

[0029] 251: First yarn feeding hole

[0030] 252: Second yarn feeding hole

[0031] 253, 254: Imaginary planes

[0032] 26: Needle selector

[0033] 31: First Trajectory

[0034] 32: Second Trajectory

[0035] 331: First needle exit segment

[0036] 332: First decrease stitch segment

[0037] 333: Maintaining Section

[0038] 334: Loop segment

[0039] 335: Second needle exit segment

[0040] 336: Second decrease in stitch length

[0041] 34: The Third Trajectory

[0042] 40: Double-sided yarn-dyed fabric

[0043] 41: Front

[0044] 42: Front yarn circle

[0045] 43: Back Yarn Loop

[0046] 44: First Color Yarn

[0047] 45: Second color yarn

Claims

1. A circular knitting machine for knitting double-sided yarn-dyed fabrics, comprising a cylinder, a needle plate, a cylinder bevel assembly, a needle plate bevel assembly, and at least one yarn feeder, wherein the cylinder includes a plurality of first needles guided by the cylinder bevel assembly, the needle plate includes a plurality of second needles guided by the needle plate bevel assembly, the plurality of first needles knitting to form a plurality of front loops of a double-sided yarn-dyed fabric, the plurality of second needles knitting to form a plurality of back loops of the double-sided yarn-dyed fabric, and the at least one yarn feeder feeding in a first colored yarn and a second colored yarn, characterized in that: Each of the plurality of first needles has a first track and a second track that partially overlaps with the first track. Each of the plurality of first needles hooks only the first colored yarn in the first track to form one of the plurality of front yarn loops. Each of the plurality of first needles hooks only the second colored yarn in the second track to form one of the plurality of front yarn loops. Each of the plurality of second needles is guided by the needle plate corner group and has only a single track. Each of the plurality of second needles hooks both the first colored yarn and the second colored yarn to form one of the plurality of back yarn loops. The circular knitting machine has at least one needle selector for controlling the plurality of first needles to move along the first track or the second track.

2. The circular knitting machine for knitting double-sided yarn-dyed fabrics according to claim 1, characterized in that, Each of the plurality of first needles has a third track that is not yet engaged to hook either the first yarn or the second yarn, and the at least one needle selector controls the plurality of first needles to move in one of the following ways: the first track, the second track, and the third track.

3. The circular knitting machine for knitting double-sided yarn-dyed fabrics according to claim 1 or 2, characterized in that, The first track includes a first exit segment, a first take-off segment following the first exit segment, a holding segment following the first take-off segment, and a looping segment following the holding segment. The second track includes the first exit segment, the first take-off segment, a second exit segment following the first take-off segment, a second take-off segment following the second exit segment, and the looping segment following the second take-off segment. When each of the plurality of second needles takes off and forms a loop, one of the plurality of first needles that is adjacent to the second needle and can cooperate to produce a knitting action moves in the looping segment of the first track or the second track.

4. The circular knitting machine for knitting double-sided yarn-dyed fabrics according to claim 3, characterized in that, The at least one yarn feeding nozzle has a first yarn feeding hole through which the first colored yarn passes and a second yarn feeding hole through which the second colored yarn passes, and the imaginary plane in which the first yarn feeding hole is located intersects with the imaginary plane in which the second yarn feeding hole is located.

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