Double-sided circular knitting machine

Abstract

A double-sided circular knitting machine includes a knitting mouth, at least one yarn feeding port for feeding two yarns towards the knitting mouth, a plurality of upper knitting needles, a plurality of lower knitting needles, and a selector. The two yarns are interlaced at a tuck point located in the knitting mouth. Each lower knitting needle is controlled by the selector to have two tuck states. Each lower knitting needle has a catch point in each tuck state. The two catch points are located differently in the knitting mouth. The distance between the two catch points and the tuck point is different. Each lower knitting needle catches the two yarns at one of the two catch points. The relative position of the two yarns at the moment determines the loop formation to be one of a forward loop and a reverse loop.

Description

Technical Field

[0001] This invention relates to a double-sided circular knitting machine, and more particularly to a circular knitting machine that can perform yarn-dyed jacquard knitting when knitting double-sided fabrics. Background Technology

[0002] Current circular knitting machine designs necessitate post-knitting dyeing for multi-color double-knitted fabrics. If yarn-dyed jacquard is used, the fabric weight and thickness will clearly not meet the requirements for commercial fabrics. More specifically, current circular knitting machines for yarn-dyed jacquard require feeding one color yarn through one feeder. To achieve a four-color jacquard, a single knitting process would require passing through four feeders, leading to the aforementioned problems with the double-knitted fabric. Summary of the Invention

[0003] The main objective of this invention is to solve the problem that the thickness and weight of yarn-dyed jacquard double-sided knitted fabrics are difficult to meet market demands due to the structure of existing circular knitting machines.

[0004] To achieve the above objectives, the present invention provides a double-sided circular knitting machine, comprising a knitting mouth, at least one yarn feeder that feeds two yarns into the knitting mouth, at least one upper needle bevel, a plurality of upper needles guided by the at least one upper needle bevel, at least one lower needle bevel, a plurality of lower needles guided by the at least one lower needle bevel, and a needle selector. The two yarns are interlaced at a take-off point located within the knitting mouth. Each lower needle is controlled by the needle selector to have two take-off states. Each lower needle has a yarn hook point in each take-off state. The two yarn hook points are located at different positions within the knitting mouth, and the distance between the two yarn hook points and the take-off point is different. Each lower needle hooks the two yarns at one of the two yarn hook points. The relative position of the two yarns at the current time determines whether the loop is formed as a right-side loop or a left-side loop.

[0005] In one embodiment, the double-sided circular knitting machine has two yarn feed ports, each feeding two yarns into the knitting nozzle, and the multiple yarns fed into the knitting nozzle by the two yarn feed ports are of different colors.

[0006] In one embodiment, each down needle has a first half-needle position, each up needle has a second half-needle position, each down needle has a first decrease starting point in each decrease state starting from the first half-needle position, and each up needle has a second decrease starting point starting from the second half-needle position. The position of the second decrease starting point at the knitting vent is between the positions of the two first decrease starting points at the knitting vent.

[0007] In one embodiment, each yarn has a feeding path, the two feeding paths are different, and the extensions of the two feeding paths intersect at the take-off point.

[0008] In one embodiment, each down needle has a first clearing point in each closing state, and each up needle has a second clearing point when it is active. The time when the up needle enters the second clearing point is earlier than the time when the down needle enters the first clearing point.

[0009] Compared to existing double-sided circular knitting machines, the aforementioned embodiments of this invention have the following characteristics: each down needle is controlled by the needle selector to have two take-off states. The position of the yarn hook point of each down needle in these two take-off states determines whether to form a loop with a positive or negative loop, thereby achieving color-woven jacquard during the knitting of the double-sided fabric. This invention makes the fabric weight and thickness of the multi-colored jacquard double-sided knitted fabric significantly lighter and thinner than that knitted by existing circular knitting machines, and better meets the design requirements of commercial clothing. Attached Figure Description

[0010] Figure 1 This is a partial structural schematic diagram (I) of the double-sided circular knitting machine of the present invention.

[0011] Figure 2 This is a partial structural schematic diagram (II) of the double-sided circular knitting machine of the present invention.

[0012] Figure 3 This is a schematic diagram of the double-sided circular knitting machine of the present invention in one of the needle-removal states.

[0013] Figure 4 This is a schematic diagram illustrating another take-off state of the double-sided circular knitting machine of the present invention.

[0014] Figure 5 This is a top view schematic diagram of a partial structure of the double-sided circular knitting machine of the present invention.

[0015] Figure 6 This is a schematic diagram of the needle trajectory of the double-sided circular knitting machine of the present invention in one of the needle-removal states.

[0016] Figure 7 This is a schematic diagram of the needle trajectory of the double-sided circular knitting machine of the present invention in another needle-retraction state.

[0017] Figure 8 This is a schematic diagram of knitting a double-sided knitted fabric according to an embodiment of the double-sided circular knitting machine of the present invention.

[0018] Figure 9 This is a schematic diagram of a double-sided knitted fabric completed by the needles in an embodiment of the double-sided circular knitting machine of the present invention. Detailed Implementation

[0019] The invention is described in detail below with reference to the accompanying drawings:

[0020] Please see Figure 1 and Figure 2This invention provides a double-knitted circular knitting machine 20, comprising a knitting mouth 21, at least one yarn feeder 22, at least one upper needle bevel 23, multiple upper needles 24, at least one lower needle bevel 25, multiple lower needles 26, and a needle selector 27. The knitting mouth 21 is composed of an upper needle plate 28 and a lower needle cylinder 29. The knitting mouth 21 is where the upper needles 24 and lower needles 26 interact to knit a double-knitted fabric. Furthermore, the at least one yarn feeder 22 is implemented by a yarn feeding mechanism mounted on the double-knitted circular knitting machine 20. This yarn feeding mechanism is an existing component of the double-knitted circular knitting machine 20 and will not be described in detail here. The at least one upper needle bevel 23 is located on the upper needle plate 28. The at least one upper needle bevel 23 can be composed of multiple bevel blocks, forming an upper needle track that provides movement for the upper needles 24. The upper needles 24 are guided by the at least one upper needle bevel 23 and move back and forth within the knitting nozzle 21, generating a knitting action. On the other hand, the at least one lower needle bevel 25 is located in the lower needle cylinder 29, and the at least one lower needle bevel 25 may be composed of multiple bevel blocks. The at least one lower needle bevel 25 forms a lower needle track that provides movement for the lower needles 26, allowing each lower needle 26 to move within at least two tracks. Continuing, the lower needles 26 are guided by the at least one lower needle bevel 25 and move back and forth within the knitting nozzle 21, generating a knitting action. Furthermore, the lower needles 26 cooperate with the upper needles 24 to knit the double-knitted fabric. Furthermore, the needle selector 27 controls the activity state of each lower needle 26 based on a signal provided by a circular knitting machine controller (not shown). The needle selector 27 changes the position of each lower needle 26 within the lower needle track by pushing a selector foot of each lower needle 26, so that each lower needle 26 moves in one of the at least two tracks.

[0021] Please see Figure 3 and Figure 4 The yarn feed opening 22 is configured to feed two yarns 30 and 31 into the knitting nozzle 21. These two yarns 30 and 31 intersect at a take-off point 32 located within the knitting nozzle 21. The horizontal position of the take-off point 32 is lower than the upper knitting needles 24. Further, yarn 30 has a yarn feed path 301, and yarn 31 has a yarn feed path 311. These two yarn feed paths 301 and 311 are different, and their extensions intersect at the take-off point 32. Moreover, when viewed from the side of the double-sided circular knitting machine 20, the two yarns 30 and 31, besides intersecting at the take-off point 32, are at different heights, such as... Figure 3Furthermore, viewed from the top angle of the double-sided circular knitting machine 20, the two yarns 30 and 31, except for interlacing at the take-off point 32, are positioned one in front of the other, as shown in the image. Figure 5 Furthermore, the knitting nozzle 21 of the double-sided circular knitting machine 20 is circular. If the relative positions of the two yarns 30 and 31 at different distances from the take-off point 32 are observed based on the take-off point 32, it can be understood that the relative positions of the two yarns 30 and 31 are not absolute.

[0022] And please match Figure 3 , Figure 4 , Figure 6 and Figure 7 On the other hand, each knitting needle 26, controlled by the needle selector 27, has two take-off states. Each knitting needle 26 has a yarn hook point 261 (262) in each take-off state. The yarn hook point 261 (262) refers to the position where each knitting needle 26 hooks onto each yarn 30, 31 during the yarn looping process. Furthermore, the two yarn hook points 261 and 262 are located at different positions on the knitting vent 21, and the distances between the two yarn hook points 261 and 262 and the take-off point 32 are different. That is, one of the two yarn hook points 261 and 262 is closer to the take-off point 32, and the other is farther away. Furthermore, each knitting needle 26 hooks the two yarns 30 and 31 at one of the two yarn hooking points 261 and 262, and the current relative position of the two yarns 30 and 31 determines whether the loop is formed as a right loop or a left loop. More specifically, the aforementioned right loop or left loop is based on the relative position of the two yarns 30 and 31 within the hook 263 of each knitting needle 26. It should be understood that when each knitting needle 26 hooks the yarn at one of the two yarn hooking points 261 and 262, the relative position of the two yarns 30 and 31 within the hook 263 of one of the knitting needles 26 is already determined, and no other assistance is needed to change the relative position of the two yarns 30 and 31 within the hook 261. The looping of the two yarns 30 and 31, whether right loop or left loop, will change the color of the surface of the double-sided knitted fabric, thereby enabling color-woven jacquard. In one embodiment, the double-sided circular knitting machine 20 has two yarn feed ports 22, each feeding two yarns 30, 31 (33, 34) into the knitting nozzle 21. The colors of the yarns 30, 31, 33, and 34 fed into the knitting nozzle 21 by the two yarn feed ports 22 are different. Further, if the number of yarns 30, 31, 33, and 34 fed into the knitting nozzle 21 by the two yarn feed ports 22 is four, then two-nozzle four-color jacquard weaving can be achieved. The knitting sequence of the double-sided circular knitting machine 20 is shown in the diagram below. Figure 8 As disclosed, the finished double-knitted fabric is as follows: Figure 9disclosed, Figure 8 The numbers 40 and 41 indicate the knitting sequence of the two knitting holes respectively. This invention makes the double-sided knitted fabric of the four-color jacquard significantly lighter and thinner than that of the previous four-color knitted fabrics, and better meets the design requirements of commercial clothing.

[0023] Please see Figure 6 and Figure 7 In one embodiment, each down needle 26 has a first half-needle position 264, each up needle 24 has a second half-needle position 241, each down needle 26 has a first decrease-off starting point 265 (or 267) in each decrease-off state, starting from the first half-needle position 264, and each up needle 24 has a second decrease-off starting point 242, starting from the second half-needle position 241. The second decrease-off starting point 242 is located at the knitting edge 21 between the positions of the two first decrease-off starting points 265 and 267 at the knitting edge 21. On the other hand, each down needle 26 has a first clearing point 266 in each decrease-off state, and each up needle 24 has a second clearing point 243 during movement. The time when the up needles 24 enter the second clearing point 243 is earlier than the time when the down needles 26 enter the first clearing point 266.

[0024] Explanation of symbols in attached drawings

[0025] 20: Double-sided circular knitting machine

[0026] 21: Knitted mouth

[0027] 22: Feeding the gauze mouth

[0028] 23: Upper knitting needle mountain corner

[0029] 24: Knitting needles

[0030] 241: Position of the second half stitch

[0031] 242: Second closing point

[0032] 243: Second Loop Clearing Point

[0033] 25: Lower knitting needle mountain corner

[0034] 26: Knitting stitch

[0035] 261, 262: Crochet points

[0036] 263: Hook

[0037] 264: First half stitch position

[0038] 265, 267: First point of closing stitches

[0039] 266: First loop clearing point

[0040] 27: Needle selector

[0041] 28: Upper needle plate

[0042] 29: Insert syringe

[0043] 30, 31, 33, 34: Yarn

[0044] 301, 311: Yarn feeding path

[0045] 32: Point of finishing stitch

[0046] 40, 41: Single-knitting diagram

Claims

1. A double-sided circular knitting machine, comprising a knitting vent, at least one feed vent for feeding two yarns into the knitting vent, at least one upper needle bevel, a plurality of upper needles guided by the at least one upper needle bevel, at least one lower needle bevel, and a plurality of lower needles guided by the at least one lower needle bevel, wherein the two yarns are interlaced at a take-off point located within the knitting vent, characterized in that: The double-sided circular knitting machine has a needle selector. Each of the lower knitting needles is controlled by the needle selector to have two take-off states. Each of the lower knitting needles has a yarn hook point in each take-off state. The two yarn hook points are located at different positions on the knitting nozzle. The distance between the two yarn hook points and the take-off point is different. When each lower knitting needle hooks two yarns at one of the two yarn hook points, the relative position between the two yarns determines whether the loop is formed in this loop as one of the following: a right loop or a reverse loop.

2. The double-sided circular knitting machine according to claim 1, characterized in that, The double-sided circular knitting machine has at least two yarn feeding ports, each of which feeds two yarns into the knitting nozzle, and the multiple yarns fed into the knitting nozzle by the at least two yarn feeding ports are of different colors.

3. The double-sided circular knitting machine according to claim 1 or 2, characterized in that, Each of the down needles has a first half-needle position, each of the up needles has a second half-needle position, each of the down needles has a first decrease-off starting point in each decrease-off state starting from the first half-needle position, and each of the up needles has a second decrease-off starting point starting from the second half-needle position. The position of the second decrease-off starting point at the knitting opening is between the positions of the two first decrease-off starting points at the knitting opening.

4. The double-sided circular knitting machine according to claim 3, characterized in that, Each of the yarns has a feeding path, the two feeding paths are different, and the extensions of the two feeding paths intersect at the take-off point.

5. The double-sided circular knitting machine according to claim 4, characterized in that, Each of the down needles has a first clearing point in each of the decrease states, and each of the up needles has a second clearing point when it is active. The time when the up needle enters the second clearing point is earlier than the time when the down needle enters the first clearing point.

6. The double-sided circular knitting machine according to claim 1 or 2, characterized in that, Each of the down needles has a first clearing point in each of the decrease states, and each of the up needles has a second clearing point when it is active. The time when the up needle enters the second clearing point is earlier than the time when the down needle enters the first clearing point.

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