CN117144582A - Method for cutting thread by embroidery or sewing and thread cutting mechanism - Google Patents
Method for cutting thread by embroidery or sewing and thread cutting mechanism Download PDFInfo
- Publication number
- CN117144582A CN117144582A CN202311284402.4A CN202311284402A CN117144582A CN 117144582 A CN117144582 A CN 117144582A CN 202311284402 A CN202311284402 A CN 202311284402A CN 117144582 A CN117144582 A CN 117144582A
- Authority
- CN
- China
- Prior art keywords
- knife
- thread
- movable
- fixed
- clamping
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000009958 sewing Methods 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000009956 embroidering Methods 0.000 claims abstract description 7
- 238000009966 trimming Methods 0.000 claims description 7
- 238000010008 shearing Methods 0.000 claims description 4
- 238000004804 winding Methods 0.000 abstract description 4
- 230000015572 biosynthetic process Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000013011 mating Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B65/00—Devices for severing the needle or lower thread
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B47/00—Needle-thread tensioning devices; Applications of tensometers
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05C—EMBROIDERING; TUFTING
- D05C11/00—Devices for guiding, feeding, handling, or treating the threads in embroidering machines; Machine needles; Operating or control mechanisms therefor
- D05C11/08—Thread-tensioning arrangements
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05C—EMBROIDERING; TUFTING
- D05C11/00—Devices for guiding, feeding, handling, or treating the threads in embroidering machines; Machine needles; Operating or control mechanisms therefor
- D05C11/20—Arrangements for cutting the needle or lower threads
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Sewing Machines And Sewing (AREA)
Abstract
The invention discloses a method for embroidering or sewing thread cutting and a thread cutting mechanism. After the thread ends are clamped, the thread ends are controlled, and the winding is prevented from being pulled too much. The thread head is fixed, so that the tension of the whole upper thread can be kept to be more than 50gf, the upper thread is kept in a normal sewing state, then the needle is controlled to be put down, embroidery or sewing of the stitch is completed, formation of thread bubbles is avoided, and normal embroidery sewing is facilitated. The thread cutting mechanism is provided with the clamping arm on the movable cutter, so that the thread end of the upper thread can be effectively clamped, and the tension of the upper thread can be kept stable.
Description
Technical Field
The invention relates to a method and a thread cutting mechanism for embroidery or sewing and thread cutting, which are suitable for sewing and embroidery equipment.
Background
The embroidery machine or the sewing machine works to complete the embroidery or sewing of a graphic unit, and thread cutting is performed. After trimming, the upper thread can form free and unbound thread ends. The next needle lifting work is carried by the needle plate to be matched with the rotating shuttle. The rotating shuttle rotates to hook the thread end of the upper thread, so that the thread end is still positioned below the needle plate after the needle moves upwards. The thread end is in an uncontrollable free and unconstrained state, and the rotating shuttle continuously rotates along with the follow-up continuous needle falling and continuous embroidery, so that the rotating shuttle is easy to hook the freely uncontrollable thread end, the thread end is knotted along with the continuous embroidery, and the thread bubble is formed. After embroidery is completed, the thread ends in the embroidery process need to be cleaned, and the thread bubbles cannot be cleaned by the existing follow-up thread end cleaning equipment because the thread bubbles are knotted complete rings. Therefore, the trimming is required to be manually emphasized, which causes great workload for subsequent procedures.
In addition, when the second needle is knotted, the thread end is in a free state, so that the resistance is too small, the free uncontrolled thread end is easily pulled excessively in the thread winding process, the upper thread is loosened, and the thread is easily foamed in the knotting process.
To solve the above problems, the prior art is generally: when the upper thread end is brought below the needle plate, controlling the thread cutting moving knife to hook the upper thread end to move towards the thread cutting fixed knife until stopping at the stopping limit where the thread cutting moving knife and the thread cutting fixed knife are not closed; at this time, the hooked upper thread is limited to the lower thread retainer below the thread cutting moving knife; controlling the machine needle to be needled down to finish embroidery of at least one stitch; and controlling the thread cutting moving knife to move from the stop limit to the thread cutting fixed knife, and cutting the thread end of the thread when the thread cutting moving knife and the thread cutting fixed knife are closed. The technology only controls the thread end in a controllable space range, prevents the thread hook from being hooked again by the rotating shuttle, and can improve the thread end and thread bubble problem to a certain extent, but in actual use, the upper thread needs to bear the tensile force of not less than 50gf (gram force) in the knotting process, the resistance is still too small and is far less than 50gf because the thread end of the upper thread is still in a free state, and the free uncontrolled thread end is easy to excessively drag in the winding process, so that the upper thread is loose, and a large amount of thread bubbles still can appear. The above method or structure cannot be carried out until the practical stage.
Disclosure of Invention
The invention provides a thread cutting method and a thread cutting mechanism for embroidery or sewing, which can improve the quality of embroidery or sewing and reduce the formation of thread bubbles in the embroidery process.
The technical scheme for solving the existing problems is as follows: a method for embroidering or sewing and trimming comprises the following steps:
step 1, controlling a needle to be placed down, and enabling the needle to bring the upper thread head threaded in the needle thread hole to the lower part of the needle plate.
Step 2, controlling the movable cutter of the thread trimmer to hook the thread end of the upper thread to move towards the fixed cutter, and clamping part or all of the thread end between the movable cutter and a clamping arm of the fixed cutter or between the movable cutter and a thread clamp by the movable cutter; or a moving knife which moves, and part or all of the thread end is clamped between the moving knife and the needle plate.
And 3, controlling the machine needle to be needled down to complete embroidery or sewing of at least one stitch.
As a further improvement, the moving knife which moves to the fixed knife to hook the thread end in the step 2, when the moving knife and the fixed knife close the thread end of the shearing surface thread, the thread end allowance part connected with the upper thread is just clamped; or clamped as the moving blade moves toward the stationary blade.
As a further improvement, the movable knife moving towards the fixed knife is stopped at the matching position of the clamping arm between the movable knife and the fixed knife; and clamping arms between the movable knife and the fixed knife, wherein at least one clamping arm is provided with elasticity of a clamping wire.
As a further improvement, the thread clamp is a thread clamp elastic sheet which is arranged on the knife rest and is in interference fit with the movable knife.
The thread cutting mechanism comprises a movable cutter and a fixed cutter which are matched with each other, and as improvement, a clamping arm which is matched with the movable cutter by rotating towards the fixed cutter along with the movable cutter is arranged between the movable cutter and the fixed cutter; or/and the movable knife is provided with a clamping arm matched with the needle plate, and the matched clamping arm is positioned on the path of the movable knife for hooking the wire.
As a further improvement, the clamping arm is a clamping arm of an elastic clamping wire.
As a further improvement, the movable knife is provided with a clamping block matched with the corresponding part of the fixed knife or/and the bottom of the needle plate, and the clamping block forms a clamping arm of the movable knife; or/and the fixed knife is provided with a fixed knife clamping block matched with the corresponding part of the movable knife, and the fixed knife clamping block forms a clamping arm of the fixed knife.
As a further improvement, the movable knife comprises a bottom plate, a movable knife edge and a rear clamping block, wherein the bottom plate can rotate around the knife shaft, the movable knife edge is arranged on the bottom plate, the rear clamping block is arranged on the movable knife edge, the movable knife is in front of the fixed knife in the moving matching direction, and the movable knife is in back of the movable knife in the moving disengaging direction.
As a further improvement, the movable knife rotating towards the fixed knife is matched with the fixed knife shearing line before the movable knife is matched with the clamping arm of the fixed knife.
As a further improvement, the movable knife is matched with the clamping arm to form a stop for the movable knife.
Compared with the prior art, the needle brings the upper thread end threaded in the needle thread hole of the needle to the lower part of the needle plate, and the movable knife which controls the thread shearing movable knife to hook the upper thread end to move towards the fixed knife can clamp part or all of the thread end. After the thread ends are clamped, the thread ends are controlled, and the winding is prevented from being pulled too much. The needle has the advantages that the thread end is fixed, so that the tension of the whole upper thread can be kept to be more than 50gf, the upper thread is kept in a normal sewing state, then the needle is controlled to be put down, embroidery or sewing of stitch is completed, formation of thread bubbles is avoided, and normal embroidery stitch making is facilitated.
The thread cutting mechanism is provided with the clamping arm on the movable cutter, so that the thread end of the upper thread can be effectively clamped, the tension of the upper thread is kept stable, and the thread end and the upper thread can keep the tension of more than 50gf required by normal embroidery sewing.
Drawings
Fig. 1 is a schematic view of the structure of the needle after the needle brings the thread into the lower part of the needle plate.
Fig. 2 is a schematic diagram of the structure of the movable knife for hooking the thread end after the needle brings the thread end under the needle plate.
Fig. 3 is an enlarged schematic view at a of fig. 2.
Fig. 4 is a schematic structural view of a movable cutter hook wire head.
Fig. 5 is a schematic diagram of the structure at b of fig. 4.
Fig. 6 is a schematic structural view of a clamping arm for clamping a wire end by matching a movable knife with a fixed knife.
Fig. 7 is a schematic view of the structure at c of fig. 6.
Fig. 8 is a schematic diagram of the structure of the movable knife and the fixed knife.
Fig. 9 is a schematic view of another view angle structure of the movable knife and the fixed knife.
Fig. 10 is a schematic structural view of the movable blade and the stationary blade in a clamped state after cutting the wire.
Fig. 11 is a top view of an embroidered site.
Fig. 12 is a cross-sectional view taken along A-A of fig. 11.
Fig. 13 is an enlarged schematic view at c of fig. 12.
Detailed Description
Referring to fig. 1 to 13, in a method of embroidering or sewing a cut thread, a needle 4 is positioned above a needle plate 5 in an initial state, and a cloth to be embroidered or sewn can be placed above the needle plate 5. After the embroidery machine or the sewing machine is started, the working steps are as follows:
and 1, controlling the needle 4 to be placed down, and enabling the needle 4 to bring the upper thread end threaded in the thread hole of the needle 4 to the lower part of the needle plate.
Step 2, controlling the movable cutter 1 for cutting the upper thread to hook the upper thread end and move towards the fixed cutter 2, wherein the movable cutter 1 for moving can clamp part or all of the thread end between the movable cutter 1 and the clamping arm 3 of the fixed cutter 2; or the moving knife 1 clamps part or all of the thread end between the moving knife 1 and the thread clamp; referring to fig. 12-13 or moving knife 1, a portion or all of the thread end is clamped between the clamping arm 3 of the moving knife 1 and the needle plate 5. The thread end can be clamped between the movable cutter 1 and the fixed cutter 2 through the movement of the movable cutter 1 to the fixed cutter, and an independent thread clamp can be arranged to be matched with the movable cutter to clamp the thread end; the thread end can also be clamped between the movable knife 1 and the needle plate 5. Or any two or three of the above schemes may be arbitrarily combined.
The thread clamp is a thread clamp elastic sheet which is arranged on the knife rest 21 and in interference fit with the movable knife 1, and when the movable knife moves towards the fixed knife, the thread end is driven to enter the thread clamp. In the present embodiment, the thread end is preferably clamped to the clamping arm 3 between the movable blade and the fixed blade.
And 3, controlling the needle 4 to be needled down to finish embroidery or sewing of at least one stitch.
In the embodiment of the present invention, as a mode of the clamping arm 3, the clamping arm 3 may be formed by a mating surface of the upper blade surface of the movable blade 1 and the fixed blade 2. As shown in fig. 4-5, the upper thread end can be clamped between the upper surface of the movable cutter and the lower surface of the fixed cutter.
Preferably, in order to facilitate thread hooking, thread cutting and thread clamping, in step 1, the needle 4 is controlled to be driven down, and the movable cutter 1 is controlled to be opened before passing through the needle plate hole 51, so that the upper thread passes through the space between the fixed cutter 2 and the movable cutter 1 from the needle plate hole 51 and then enters the rotating shuttle to be matched with the rotating shuttle. Or after the thread end of the upper thread is brought below the needle plate 5, the brake knife 1 is controlled to be opened at the latest before the next needle 4 passes through the needle plate hole, so that the upper thread can pass through the space between the fixed knife 2 and the movable knife 1, and the upper thread can be hooked by the passive knife.
The structure of the movable blade 1 and the fixed blade 2 and the moving structure of the movable blade 1 can be the structure of the prior art. The movable knife 1 can move towards the fixed knife 2 to cut lines and move towards the opposite fixed knife 2 to open.
In the step 2, the movable cutter 1 for hooking the thread ends moves towards the fixed cutter 2, and when the movable cutter 1 and the fixed cutter 2 are closed to cut the thread ends of the upper threads, the thread end allowance part connected with the upper threads is just clamped; or the thread end allowance part connected with the upper thread can be clamped by a thread clamp along with the movement of the movable knife 1 to the fixed knife 2 and the clamping of the driven knife clamping arm and the needle plate. The thread end which is the thread end allowance part connected with the upper thread is cut from a certain position of the non-thread end root part of the thread end section, and the thread end part is also connected with the upper thread, and the thread end part is just clamped when the thread end is cut, or is clamped along with the movement of the movable cutter 1 to the fixed cutter 2.
After thread trimming, the thread ends are uniform in length, the thread end allowance part connected with the upper thread is clamped, so that the embroidery thread is conveniently drawn tightly, the integral tension of the thread conveying side and the thread end side of the upper thread is kept stable, the thread ends cannot break loose from the bottom thread, and thread bubbles can be completely eliminated.
The movable knife 1 moving towards the fixed knife 2 is stopped at the matching position of the clamping arm 3 between the movable knife 1 and the fixed knife 2; the clamping arm 3 between the movable knife 1 and the fixed knife 2, namely the corresponding part between the movable knife 1 and the fixed knife 2 is provided with the matched clamping arm 3, or the clamping line part forms the clamping arm 3. At least one of the clamping arms 3 is provided with elasticity for clamping the thread, which facilitates clamping the thread end.
In order to facilitate thread cutting and thread clamping, the invention also discloses a thread cutting mechanism which comprises a movable cutter 1 and a fixed cutter 2 which are matched with each other, wherein a clamping arm 3 which is matched with the movable cutter 1 in a way of rotating towards the fixed cutter 2 is arranged between the movable cutter 1 and the fixed cutter 2. Or/and the movable blade 1 is provided with a clamping arm 3 which cooperates with the needle plate 5, as shown in fig. 12-13. The matched clamping arm 3 is clamped on the path of the movable knife 1 of the line hooked by the movable knife 1. The movable knife 1 and the fixed knife 5 can be matched to clamp the thread end; or/and the movable knife 1 is matched with the needle plate 5 to clamp the upper thread.
In the embodiment of the present invention, as a mode of the clamping arm 3, the clamping arm 3 may be formed by a mating surface of the upper blade surface of the movable blade 1 and the fixed blade 2.
The clamping arm 3 is a clamping arm for elastically clamping the wire.
The movable knife 1 is provided with a clamping block 11 matched with the corresponding part of the fixed knife 2 or/and matched with the bottom of the needle plate 5, and the clamping block 11 forms a clamping arm 3 of the movable knife 1. Or/and the fixed knife 2 can be also provided with a fixed knife clamping block matched with the corresponding part of the movable knife 1, and the fixed knife clamping block forms a clamping arm of the fixed knife 2.
The movable knife 1 comprises a bottom plate, a movable knife edge 12 and a rear clamping block 11, wherein the bottom plate can rotate around a knife shaft, the movable knife edge 12 is arranged on the bottom plate, the rear clamping block 11 is arranged on the movable knife edge 12, the movable knife 1 is in front of the fixed knife 2 in the moving fit direction, and the movable knife 1 is in back of the moving fit direction.
If the thread end is clamped by the movable knife and the fixed knife, the movable knife 1 rotating towards the fixed knife 2 is matched with the fixed knife 2 in a thread cutting way, and the movable knife 1 is matched with the clamping arm 3 of the fixed knife 2 before the thread is cut.
The movable knife 1 is matched with the clamping arm 3 to form a stop for the movable knife 1.
Claims (10)
1. A method of embroidering or sewing cut thread, characterized by: step 1, controlling a needle to be placed down, and enabling the needle to bring upper thread heads threaded in needle thread holes of the needle to the position below a needle plate; step 2, controlling the movable cutter to hook the upper thread end of the upper thread to move towards the fixed cutter, and clamping part or all of the thread end between clamping arms of the movable cutter and the fixed cutter by the movable cutter; or a moving knife which moves, and part or all of the thread end is clamped between the moving knife and the thread clamp; or a moving knife which moves, and part or all of the thread ends are clamped between the moving knife clamping arm and the needle plate; and 3, controlling the machine needle to be needled down to complete embroidery or sewing of at least one stitch.
2. The method of embroidering or sewing thread trimming of claim 1, wherein: and 2, moving the movable knife for hooking the thread end to the fixed knife, and when the movable knife and the fixed knife are closed to cut the thread end of the thread, clamping the residual part of the thread end connected with the upper thread or clamping the thread end along with the movement of the movable knife to the fixed knife.
3. The method of embroidering or sewing thread trimming of claim 1, wherein: the movable knife moving towards the fixed knife is stopped at the matching position of the clamping arm between the movable knife and the fixed knife; and clamping arms between the movable knife and the fixed knife, wherein at least one clamping arm is provided with elasticity of a clamping wire.
4. The method of embroidering or sewing thread trimming of claim 1, wherein: the thread clamp is a thread clamp elastic sheet which is arranged on the tool rest and is in interference fit with the movable knife.
5. The utility model provides a cut line mechanism, includes mutually supporting movable knife and stationary knife, its characterized in that: a clamping arm which is matched with the follow-up knife to rotate towards the fixed knife is arranged between the movable knife and the fixed knife; or/and the movable knife is provided with a clamping arm matched with the needle plate, and the matched clamping arm is positioned on the path of the movable knife for hooking the wire.
6. The thread cutting mechanism as recited in claim 6, wherein: the clamping arms are elastic clamping arms for clamping the wires.
7. The thread cutting mechanism as recited in claim 6, wherein: the movable knife is provided with a clamping block matched with the corresponding part of the fixed knife or/and the bottom of the needle plate, and the clamping block forms a clamping arm of the movable knife; or/and the fixed knife is provided with a fixed knife clamping block matched with the corresponding part of the movable knife, and the fixed knife clamping block forms a clamping arm of the fixed knife.
8. The thread cutting mechanism as recited in claim 6, wherein: the movable knife comprises a bottom plate, a movable knife edge and a rear clamping block, wherein the bottom plate can rotate around the knife shaft, the movable knife edge is arranged on the bottom plate, the rear clamping block is arranged on the movable knife edge, the movable knife is in front of the fixed knife in the moving fit direction, and the movable knife is in back of the movable knife in the moving out-of-fit direction.
9. The thread cutting mechanism as recited in claim 6, wherein: the movable knife rotating towards the fixed knife is matched with the fixed knife shearing line, and is matched with the clamping arm of the fixed knife before the movable knife.
10. The thread cutting mechanism as recited in claim 6, wherein: the movable knife is matched with the clamping arm to form a stop for the movable knife.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311284402.4A CN117144582A (en) | 2023-09-30 | 2023-09-30 | Method for cutting thread by embroidery or sewing and thread cutting mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311284402.4A CN117144582A (en) | 2023-09-30 | 2023-09-30 | Method for cutting thread by embroidery or sewing and thread cutting mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117144582A true CN117144582A (en) | 2023-12-01 |
Family
ID=88884303
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311284402.4A Pending CN117144582A (en) | 2023-09-30 | 2023-09-30 | Method for cutting thread by embroidery or sewing and thread cutting mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117144582A (en) |
-
2023
- 2023-09-30 CN CN202311284402.4A patent/CN117144582A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111074444B (en) | Thread trimming control method and device capable of controlling length of thread end of embroidery machine surface thread | |
| CN104911838B (en) | Sewing machine removes Bird's Nest device and application method | |
| CN105568575B (en) | A kind of sewing machine removes the thread-loosening device and application method of Bird's Nest structure | |
| CN112647208B (en) | Thread cutting method of embroidery machine | |
| CN204738119U (en) | Sewing machine gets rid of bird's nest device | |
| EP2016218A1 (en) | Separating and positioning device | |
| CN115710783A (en) | Thread cutting method of embroidery machine | |
| JP5766405B2 (en) | sewing machine | |
| CN110938949A (en) | Automatic pile opening/loop pile removing mechanism of computer gun-punched carpet machine | |
| CN221544979U (en) | Wire cutting mechanism | |
| CN102758317B (en) | Sewing and embroidering process of high-speed intelligent thread-hooking trimming leather sewing and embroidering machine | |
| CN117144582A (en) | Method for cutting thread by embroidery or sewing and thread cutting mechanism | |
| CN1523156B (en) | Sewing machine | |
| CN214882237U (en) | Thread cutting device of embroidery machine | |
| CN114737326B (en) | Computerized embroidery machine for toothbrush embroidery | |
| CN212388184U (en) | Chain type lockstitch sewing machine | |
| JP3447335B2 (en) | Needle thread cutting device and needle thread cutting method for embroidery sewing machine | |
| CN211596019U (en) | Automatic pile opening/loop pile removing mechanism of computer gun-punched carpet machine | |
| JP3969574B2 (en) | sewing machine | |
| EP1472399A1 (en) | Device and method to apply paillettes on fabrics in a sewing machine, and multi-needle sewing machine comprising said device | |
| CN214115921U (en) | Embroidery machine thread hooking device capable of automatically adjusting thread amount | |
| JPH09164280A (en) | Intermittent stitch sewing method and sewing machine therefor | |
| CN211199682U (en) | Upper and lower double-cutter thread trimming mechanism of computerized embroidery machine | |
| WO2005024109A1 (en) | Device to automatically change the thread in a needle in textile machines, relative method and textile machine adopting said thread-change device | |
| JP2583088B2 (en) | Repair method of needle thread break in multi-head sewing machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |