Loop pile cutting machine
By introducing A/B hook and cutter needle tracks and a hook/cutter reduction design into the loop-cutting pile machine, the problems of back defects and unevenness caused by pile curling in short pile products are solved, achieving uniformity and high bonding strength of the pile and improving product quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 福建泉州凹凸纺织科技有限公司
- Filing Date
- 2025-04-15
- Publication Date
- 2026-05-12
AI Technical Summary
In the production of short pile products using existing cut loop pile machines, the pile tends to stick up and be easily caught by the next knitting pass, resulting in defects on the back and uneven pile.
The design incorporates A/B crochet and cutter tracks, including tightening and lowering hook/cutter tracks. The tightening action ensures a secure bond between the loop root and the fabric, and the loops are cut after the next knitting action to prevent the pile from sticking up at too large an angle. The lowering hook/cutter track ensures accurate cutting.
It solves the problems of defects on the back of short-pile products and uneven pile, improves the uniformity and bonding strength of the pile, and increases the yield rate.
Smart Images
Figure CN224227450U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of textile technology, and in particular to a loop cutting machine. Background Technology
[0002] A loop-cutting pile machine is a device that cuts loops in textiles to create a pile-like surface. Existing loop-cutting pile machines and processes involve cutting the loop into two pile strands after each loop is woven. This existing process is particularly problematic in the production of short-pile products. Because the pile is short, the cut pile tends to curl upwards, and since this pile is located on the first layer of the fabric (the outermost layer), it curls upwards at a significant angle relative to the horizontal plane (e.g., ...). Figure 5 As shown in the diagram, where the red lines represent the pile that was cut out in this instance, during the next knitting pass, the raised pile is easily caught and incorporated into the fabric during the needle's entry and exit. This pile becomes embedded in the base fabric and protrudes from the back, resulting in defects on the back of the fabric and uneven pile on the front. Therefore, how to improve the design to solve these defects is the problem to be solved in this case. Utility Model Content
[0003] To overcome the shortcomings of the existing technology, this utility model provides a loop-cutting pile machine for solving the problem of back defects, especially in short pile products.
[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A loop-cutting fabric machine, comprising:
[0005] The lower triangular block has A-crochet track, B-crochet track, lower knitting needle track, A-cutting needle track, and B-cutting needle track. The A-crochet track has several spaced A-pull-up tracks, the B-crochet track has several spaced B-pull-up tracks, the lower knitting needle track has several spaced binding tracks, the A-cutting needle track has several spaced A-cutting loop tracks, and the B-cutting needle track has several spaced B-cutting loop tracks. The lower triangular block forms a cyclically arranged first knitting segment, second cut-loop segment, second knitting segment, and first cut-loop segment. The first knitting segment includes binding tracks and A-pull-up tracks; the second cut-loop segment includes B-cutting loop tracks; the second knitting segment includes binding tracks and B-pull-up tracks; and the first cut-loop segment includes A-cutting loop tracks.
[0006] The lower needle cylinder is equipped with several A-knife hook bodies, B-knife hook bodies, and lower knitting needles, and the lower needle cylinder forms a cyclic arrangement of A-knife hook bodies, lower knitting needles, B-knife hook bodies, and lower knitting needles; the A-knife hook body includes an A-hook needle and an A-knife needle, the A-hook needle being driven by an A-hook needle trajectory and the A-knife needle being driven by an A-knife needle trajectory; the B-knife hook body includes a B-hook needle and a B-knife needle, the B-hook needle being driven by a B-hook needle trajectory and the B-knife needle being driven by a B-knife needle trajectory.
[0007] Furthermore, the upper triangular block has a needle track on A and a needle track on B, and the upper needle plate has several needles on A and needles on B arranged in a cyclical pattern. The needles on A are driven by the needle track on A, and the needles on B are driven by the needle track on B.
[0008] Furthermore, the A-needle trajectory also includes an A-descending trajectory, which corresponds to the lower position of the A-scraping trajectory; the B-needle trajectory also includes a B-descending trajectory, which corresponds to the lower position of the B-scraping trajectory.
[0009] Furthermore, the A crochet track also includes the A descending hook track, which corresponds to the A loop cutting track; the B crochet track also includes the B descending hook track, which corresponds to the B loop cutting track.
[0010] As can be seen from the above description of this utility model, compared with the prior art, the loop-cutting pile machine provided by this utility model has the following advantages:
[0011] 1. After knitting, the loops are not cut in the next movement. Instead, the previous loop is cut only after the next knitting movement is completed. This results in a smaller angle of the pile rising relative to the horizontal plane after the loop is cut, preventing the pile from being caught by the needles in the next knitting pass. This solves the problem of back defects in short-pile products and makes the pile surface of the product uniform.
[0012] 2. Before being cut, the A / B loops of this application are tightened twice through the first and second weaving sections. Therefore, when the A / B loops are cut, the root of the loop is firmly attached to the fabric. The loops are less likely to shift during the cutting process, which ensures accurate cutting position and thus ensures high uniformity of the pile on the product.
[0013] 3. Both A and B loops are tightened twice, resulting in a high bonding strength between the root of the pile and the fabric surface, making the product less prone to shedding.
[0014] 4. The needle trajectory also includes the lowering trajectory, which corresponds to the lower position of the napping trajectory. This design can prevent the needle from accidentally cutting the loop yarn eaten by the hook needle, resulting in high reliability of process execution and improved yield.
[0015] 5. The crochet hook trajectory also includes the lowering hook trajectory, which corresponds to the loop cutting trajectory. This allows the crochet hook to descend and tighten the loop, ensuring that the loop is cut smoothly. This process has high reliability and improves the yield rate. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the structure of a loop-cutting felt machine according to the present invention.
[0017] Figure 2 This is a diagram showing the arrangement of various needles on the syringe of the present invention.
[0018] Figure 3 This is a schematic diagram of the weaving trajectory structure of the present invention.
[0019] Figure 4 This is a schematic diagram of the working conditions of the present invention.
[0020] Figure 5 This is a schematic diagram of the working conditions of the prior art in the background art of this invention.
[0021] The diagram shows the corresponding points as follows: 11. Knitting needle A; 12. Knitting needle B; 21. Knitting needle track A; 22. Knitting needle track B; 31. Knitting hook body A; 311. Crochet hook A; 312. Knitting needle A; 32. Knitting hook body B; 321. Crochet hook B; 322. Knitting needle B; 33. Knitting needle B; 41. Crochet hook track A; 411. Frayed track A; 412. Dropped hook track A; 42. Crochet hook track B; 421. Frayed track B; 422. Dropped hook track B; 43. Knitting needle track B; 431. Binding track B; 44. Knitting needle track A; 441. Cutting loop track A; 442. Dropped hook track A; 45. Knitting needle track B; 451. Cutting loop track B; 452. Dropped hook track B; I. First knitting segment; II. First cutting loop segment; III. Second knitting segment; IV. Second cutting loop segment. Detailed Implementation
[0022] The present invention will be further described below through specific embodiments.
[0023] Reference Figures 1 to 5 As shown, a loop-cutting pile machine has the following layout and structural design:
[0024] The upper needle plate has several A upper needles 11 and B upper needles 12 arranged in a cyclical pattern. The upper triangular block has an A upper needle track 21 and a B upper needle track 22. The heel positions of the A upper needles 11 and the B upper needles 12 are different. The heel of the A upper needles 11 is embedded in the A upper needle track 21, so that the A upper needles 11 are driven by the A upper needle track 21; the heel of the B upper needles 12 is embedded in the B upper needle track 22, so that the B upper needles 12 are driven by the B upper needle track 22.
[0025] The lower needle cylinder has an A-knife hook body 31, a B-knife hook body 32, and a lower knitting needle 33. The lower needle cylinder forms a cyclical arrangement of the A-knife hook body 31, lower knitting needle 33, B-knife hook body 32, and lower knitting needle 33. The lower triangular block has A-hook needle trajectory 41, B-hook needle trajectory 42, lower knitting needle trajectory 43, A-knife needle trajectory 44, and B-knife needle trajectory 45.
[0026] In this embodiment, the knife and hook assembly adopts a separate knife and hook structure. Knife hook body 31 (A) includes two hook needles 311 and one knife needle 312, with the knife needle 312 located between the two hook needles 311. Knife hook body 32 (B) includes two hook needles 321 and one knife needle 322, with the knife needle 322 located between the two hook needles 321. Other embodiments may use an integrated knife and hook structure.
[0027] The heel positions of hook A 311 and hook B 321 are different. The heel of hook A 311 is embedded within hook A track 41, causing hook A 311 to be driven by hook A track 41; the heel of hook B 321 is embedded within hook B track 42, causing hook B 321 to be driven by hook B track 42. The heel positions of knife needle A 312 and knife needle B 322 are different. The heel of knife needle A 312 is embedded within hook A track 44, causing knife A 312 to be driven by hook A track 44; the heel of knife needle B 322 is embedded within hook B track 45, causing knife B 322 to be driven by hook B track 45.
[0028] Crochet track A 41 has several spaced A-pulling tracks 411, crochet track B 42 has several spaced B-pulling tracks 421, down-needle track 43 has several spaced binding tracks 431, cut-needle track A 44 has several spaced A-cutting tracks 441, and cut-needle track B 45 has several spaced B-cutting tracks 451. Cut-needle track A 44 also includes a descending cut track 442, which corresponds to the lower position of the A-pulling tracks 411. Cut-needle track B 45 also includes a descending cut track 452, which corresponds to the lower position of the B-pulling tracks 421. Crochet track A 41 also includes a descending hook track 412, which corresponds to the A-cutting tracks 441; crochet track B 42 also includes a descending hook track 422, which corresponds to the B-cutting tracks 451.
[0029] The weaving pattern of this application forms two interlocking units, namely the first unit and the second unit. The first unit includes the first weaving segment I and the first cutting segment II, and the second unit includes the second weaving segment III and the second cutting segment IV. The cyclical arrangement of the weaving pattern is as follows: the first weaving segment I, the second cutting segment IV, the second weaving segment III, and the first cutting segment II. The first weaving segment I includes the binding track 431, the A-pulling track 411, and the A-dropping track 442; the second cutting segment IV includes the B-cutting track 451 and the B-dropping track 422; the second weaving segment III includes the binding track 431, the B-pulling track 421, and the B-dropping track 452; and the first cutting segment II includes the A-cutting track 441 and the A-dropping track 412.
[0030] The following description uses a specific cyclic working process from this embodiment to further illustrate this application.
[0031] A cut loop pile process, comprising:
[0032] S1. Execute in the first weaving segment I:
[0033] When hook needle A 311 descends to a low position after taking in the loop yarn, cutter needle A 312 descends accordingly to make way, in order to prevent cutter needle A 312 from accidentally cutting the loop yarn taken in by hook needle A 311; the loop yarn forms loop A.
[0034] A. Upper needle 11 takes the upper binding yarn, and lower needle 33 takes the lower binding yarn and loop yarn;
[0035] The upper knitting needle 11 and the lower knitting needle 33 work together to interweave and bind the upper binding yarn, the lower binding yarn, and the A loop tightly.
[0036] S2. Execute in the second segment IV:
[0037] When the B-needle 322 rises to cut the B loop, the B-hook 321 correspondingly descends to tighten the B loop, ensuring that the B loop is cut smoothly. The B loop cut by the B loop forming the pile corresponds to the B loop formed by the second knitting segment III in the previous cycle.
[0038] S3. Executed in the second weaving section III:
[0039] When hook needle 321 descends to a low position after taking in loop yarn, cutter needle 322 descends accordingly to make way, in order to prevent cutter needle 322 from accidentally cutting the loop yarn taken in by hook needle 321, which forms loop yarn.
[0040] B. Upper needle 12 takes the upper binding yarn, lower needle 33 takes the lower binding yarn and loop yarn;
[0041] The upper needle 12 and the lower needle 33 work together to interweave and bind the upper binding yarn, the lower binding yarn, and the B loop tightly.
[0042] S4. Execute in the first segment II:
[0043] The loop A formed in the first knitting section I is not cut in the next move; instead, it is cut after the second knitting section III is completed. At this point, loop A is no longer on the outermost layer of the fabric but in the second row, lower down. The knitted fabric gradually slopes inwards, so the loop A in the second row has a smaller angle of inclination relative to the horizontal plane after cutting. This avoids the situation where the yarn is caught by the needle in the next knitting pass, thus solving the back-side defect problem, especially in short-pile products, and ensuring a uniform pile surface. (Reference) Figure 4 As shown, the red line represents the pile that was cut from loop A, and the green line represents loop B that has not yet been cut.
[0044] Similarly, the B loops formed in the second knitting segment III are not cut before the next knitting action. Instead, they are cut after the first knitting segment I is executed in the next cycle. The angle at which the B loops are cut relative to the horizontal plane is smaller. This avoids the situation where the yarn is caught along with the needle when the next knitting pass occurs.
[0045] When needle A 312 rises to cut loop A, hook needle A 311 correspondingly descends to tighten loop A, ensuring that loop A is cut smoothly. Loop A is cut to form pile, and loop A is formed in the first knitting segment I of this cycle S1.
[0046] The loop cutting machine cycles through actions S1-S4 during operation.
[0047] Before being cut, the A / B terry loops undergo two tightening processes, namely the first weaving section I and the second weaving section III. Therefore, during the cutting process, the loop roots are firmly bonded to the fabric, preventing loop shifting and ensuring accurate cutting. This results in a high degree of uniformity and consistency in the pile throughout the product. Because both A / B terry loops are tightened twice, the resulting pile roots have a strong bond with the fabric, making the product less prone to shedding.
[0048] The above is only one specific embodiment of the present utility model, but the design concept of the present utility model is not limited thereto. Any non-substantial modifications made to the present utility model using this concept shall be considered as an infringement of the protection scope of the present utility model.
Claims
1. A loop-cutting machine, characterized in that: The lower triangular block has A-crochet track, B-crochet track, lower knitting needle track, A-cutting needle track, and B-cutting needle track. The A-crochet track has several spaced A-pull-up tracks, the B-crochet track has several spaced B-pull-up tracks, the lower knitting needle track has several spaced binding tracks, the A-cutting needle track has several spaced A-cutting loop tracks, and the B-cutting needle track has several spaced B-cutting loop tracks. The lower triangular block forms a cyclically arranged first knitting segment, second cut-loop segment, second knitting segment, and first cut-loop segment. The first knitting segment includes binding tracks and A-pull-up tracks; the second cut-loop segment includes B-cutting loop tracks; the second knitting segment includes binding tracks and B-pull-up tracks; and the first cut-loop segment includes A-cutting loop tracks. The lower needle cylinder is equipped with several A-knife hook bodies, B-knife hook bodies, and lower knitting needles, and the lower needle cylinder forms a cyclic arrangement of A-knife hook bodies, lower knitting needles, B-knife hook bodies, and lower knitting needles; the A-knife hook body includes an A-hook needle and an A-knife needle, the A-hook needle being driven by an A-hook needle trajectory and the A-knife needle being driven by an A-knife needle trajectory; the B-knife hook body includes a B-hook needle and a B-knife needle, the B-hook needle being driven by a B-hook needle trajectory and the B-knife needle being driven by a B-knife needle trajectory.
2. The loop-cutting machine according to claim 1, characterized in that: The upper triangular block has needle tracks A and B. The upper needle plate has several needles A and needles B arranged in a cyclical pattern. The needles A are driven by the needle tracks A and B are driven by the needle tracks B.
3. The loop-cutting machine according to claim 1, characterized in that: The A-needle trajectory also includes the A-descending trajectory, which corresponds to the lower position of the A-scraping trajectory; the B-needle trajectory also includes the B-descending trajectory, which corresponds to the lower position of the B-scraping trajectory.
4. The loop-cutting machine according to claim 1, characterized in that: The A crochet track also includes the A drop hook track, which corresponds to the A cut loop track; the B crochet track also includes the B drop hook track, which corresponds to the B cut loop track.