A method of embroidering thread cutting

Abstract

The application discloses a method for cutting thread of embroidery, when the thread needs to be cut, a jumping motor is controlled to work, the jumping motor makes the needle rod to be separated from the driving, and the main shaft of the embroidery machine continues to work and rotates by an appropriate angle, the main shaft which continues to work drives the thread lifting assembly to continuously transport the surface thread to the needle direction, the surface thread has a certain amount and is kept appropriate relaxation, then the thread cutting mechanism is driven to cut the thread, since the surface thread is cut in the relaxation state, the beneficial effect is that during the thread cutting process, the surface thread head is relatively cut off since the surface thread is not forced, the surface thread head is relatively complete; the surface thread head will not be separated from the needle due to the tension after the thread is cut, the thread hook and the driving structure are not needed during the thread cutting process, and the embroidery machine can be greatly optimized. The thread cutting method of the application can be completely based on the existing embroidery machine structure, only the program adjustment and optimization are needed, normal thread cutting can be realized, and the subsequent continuous embroidery is not affected.

Description

Technical Field

[0001] This invention relates to a method for cutting embroidery threads. Background Technology

[0002] When embroidering, the thread guide spring on the thread adjuster usually deforms elastically to maintain the tension of the thread when changing colors or cutting the thread after completing an embroidery piece. Also, the thread itself has tension during the embroidery process. Therefore, when cutting the thread, the thread end on the needle must be left with sufficient length to prevent the thread end with a certain tension from coming out of the needle eye after cutting, thus affecting subsequent embroidery.

[0003] To ensure the needle can embroider normally after the top thread is cut, there needs to be 5-8cm of thread remaining between the thread end and the needle hole, preferably 6-7cm. Currently, when cutting thread in embroidery, a thread-catching fork is used to retain a relatively long thread end. However, the thread-catching fork and its drive mechanism are complex, occupy a lot of space, and are not conducive to optimizing the embroidery machine. Summary of the Invention

[0004] This invention addresses the problems encountered in existing embroidery thread cutting by providing a simple and effective method for preserving thread length.

[0005] The technical solution of this invention to solve the existing problems is: a method for cutting embroidery thread. When the embroidery machine needs to cut the thread during the embroidery process, the jump motor is controlled to work. The jump motor disengages the needle bar from the drive, while the main shaft of the embroidery machine continues to work and rotates at an appropriate angle. The continuing main shaft drives the thread take-up assembly, which continuously feeds the thread towards the needle. After the thread is kept at an appropriate slack, the thread cutting mechanism is driven to cut the thread. The appropriate angle is a certain amount of thread that can be driven to feed the thread take-up assembly towards the needle to prevent the thread end from coming out of the needle hole after cutting.

[0006] As a further preferred embodiment, when thread cutting is required, the top thread is locked, the jump motor is controlled to work, the jump motor disengages the needle bar from the drive, while the main shaft of the embroidery machine continues to work and rotates at an appropriate angle. The continuing main shaft drives the thread take-up assembly, which continuously feeds the top thread towards the needle. After the top thread is kept at an appropriate slack, the thread cutting mechanism is driven to cut the thread.

[0007] As a further preferred embodiment, when thread trimming is required, the jump motor is activated, disengaging the needle bar from the drive while the main shaft of the embroidery machine continues to operate and rotates at an appropriate angle. The continuing main shaft drives the thread take-up assembly, which continuously feeds the thread towards the needle via the thread adjuster. After the thread is kept at a suitable slack, the take-up spring on the thread adjuster is tightened during thread feeding. After the thread is fed and kept at a suitable slack, the thread trimming mechanism is activated to trim the thread. After trimming, the take-up spring on the thread adjuster resets, restoring the slack thread to normal tension.

[0008] As a further preferred embodiment, when thread cutting is required, the steps are as follows: 1) The hook knife hooks the thread, bringing the thread to a taut state. 2) After the thread clamping structure locks the thread, the jump motor is controlled to work. The jump motor disengages the needle bar from the drive, while the main shaft of the embroidery machine continues to work and rotates at an appropriate angle. The continuing main shaft drives the thread take-up assembly, which continuously feeds the thread towards the needle. After the thread is kept at an appropriate slack, the hook knife of the thread cutting mechanism is driven to cut the thread.

[0009] As a further preferred embodiment, the hook cutter stops at a point within 1 / 4 to 3 / 4 of its range of motion, thus keeping the thread taut.

[0010] As a further preferred option, when it is necessary to cut the thread, the thread is locked in place by a thread clamping structure.

[0011] As a further preferred embodiment, the spindle rotates at an appropriate angle of one revolution.

[0012] Compared with existing technologies, this invention, when thread trimming is required, controls the jump motor to operate. The jump motor disengages the needle bar from the drive, while the main shaft of the embroidery machine continues to work and rotates at an appropriate angle. The continuing main shaft drives the thread take-up assembly, which continuously feeds the top thread towards the needle, allowing a certain amount of excess thread. After maintaining appropriate slack, the thread trimming mechanism is driven to cut the thread. Because the top thread is trimmed in a relaxed state, its beneficial effect is that during the trimming process, since the top thread is not under stress, the thread end is cut relatively intact. After trimming, the thread end will not be pulled out of the needle due to the tension of the top thread. The thread trimming process completely eliminates the need for a thread fork and drive structure, greatly optimizing the embroidery machine. The thread trimming method of this invention can be based entirely on the existing embroidery machine structure, requiring only program adjustments and optimizations to achieve normal thread trimming without affecting subsequent embroidery. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the method of the present invention.

[0014] Figure 2 yes Figure 1 An enlarged schematic diagram of point a.

[0015] Figure 3 yes Figure 1 An enlarged schematic diagram of point b.

[0016] Figure 4-5 This is a schematic diagram of the structure of the thread take-up assembly, where the thread take-up piece moves up and down to loosen the thread. Detailed Implementation

[0017] See Figure 1-3 A method of cutting embroidery threads.

[0018] In Implementation Case 1, when the embroidery machine needs to cut the thread during the embroidery process, the jump motor is activated. The jump motor disengages the needle bar driver from the needle bar 1, stopping the drive of the needle bar 1. The needle bar 1, disengaged from the drive, returns to its ready-to-drive position under the action of a spring. Meanwhile, the main shaft of the embroidery machine continues to operate, rotating at an appropriate angle. This continues to drive the thread take-up assembly 3, which continuously feeds the top thread 2 towards the needle. After the top thread 2 is kept at a suitable slack, the thread cutting mechanism 4 is activated to cut the thread. The appropriate angle is a certain amount of thread that can be driven by the thread take-up assembly 3 to feed towards the needle, preventing the thread end of the cut thread 2 from being pulled out of the needle hole. The process before thread cutting can completely follow the normal process of existing embroidery machines. The subsequent process after thread cutting can completely follow the normal process of existing embroidery machines. See also... Figure 4-5 The thread-taking component 3 typically achieves the thread-taking work through the thread-taking piece 31.

[0019] See Figure 1 The method of the present invention can completely eliminate the need for a wire clip.

[0020] In Implementation Case 2, for better thread cutting, as a further preferred option, when thread cutting is required, the end of the top thread 2 can be locked. Specifically, the top thread 2 can be locked by a top thread clamping structure or by a hook knife with a thread cutting and locking function. The jump motor is controlled to operate, disengaging the needle bar 1 from the drive, while the main shaft of the embroidery machine continues to work and rotates at an appropriate angle. The continuing main shaft drives the thread take-up assembly 3, causing it to continuously feed the top thread 2 towards the needle. After the top thread 2 is kept at a suitable slack, the thread cutting mechanism 4 is driven to cut the thread.

[0021] The end of the thread refers to the end of the thread after it has been cut.

[0022] In Implementation Case 3, as a further preferred embodiment, when thread cutting is required, the jump motor is controlled to operate. The jump motor disengages the needle bar 1 from the drive, while the main shaft of the embroidery machine continues to operate and rotates at an appropriate angle. The continuing main shaft drives the thread take-up assembly 3, which continuously feeds the thread 2 towards the needle via the thread adjuster 5. After the thread 2 is kept at an appropriate slack, the thread take-up spring 6 on the thread adjuster 5 is tightened during the feeding of the thread 2. After the thread 2 is kept at an appropriate slack, the thread cutting mechanism 4 is driven to cut the thread. After the thread is cut, the thread take-up spring 6 on the thread adjuster 5 usually returns to its original position as the thread take-up assembly 3 stops feeding the thread, so that the slack thread 2 can maintain normal tension and work directly when entering the next section of embroidery.

[0023] The thread-locking steps in Implementation Case 2 can also be used in Implementation Case 3.

[0024] In Implementation Case 4, as a further preferred method, when it is necessary to cut the thread in embroidery, the specific steps are as follows:

[0025] 1) Use hook 6 to hook the line, so that the surface line 2 is in a taut state.

[0026] 2) After the thread clamping structure 21 locks the thread 2, it controls the jump motor to work. The jump motor disengages the needle bar 1 from the drive, while the main shaft of the embroidery machine continues to work and rotates at an appropriate angle. The continuing main shaft drives the thread take-up assembly 3, which continuously feeds the thread 2 towards the needle. After the thread 2 is kept at an appropriate slack, it drives the hook knife of the thread cutting mechanism 4 to cut the thread. The thread clamping structure 21 can further prevent the thread end from accidentally coming off the needle due to tension after cutting.

[0027] In step 2), any of the above implementation cases or any combination of implementation cases can be used.

[0028] As a further preferred embodiment, in step 1), the hook cutter stops at a point within 1 / 4 to 3 / 4 of its range of motion, so that the surface line 2 is in a taut state.

[0029] In the above embodiments, as a preferred option, the appropriate rotation angle of the main shaft is one full rotation. With one full rotation of the main shaft, the thread take-up assembly 3 can be entirely based on existing technical structures. Typically, one full rotation of the main shaft is sufficient to perform both thread feeding and take-up actions. This allows the embroidery machine to quickly and normally proceed to the next section of embroidery after completing one embroidery thread trimming operation.

[0030] In the above implementation examples, the embroidery machine, the jump motor, the needle bar 1, the needle bar driver, and the thread adjuster 5 can all adopt existing technical structures.

Claims

1. A method for cutting embroidery threads, characterized in that: When the embroidery machine needs to cut the thread during the embroidery process, the jump motor is controlled to work. The jump motor disengages the needle bar from the drive, while the main shaft of the embroidery machine continues to work and rotates at an appropriate angle. The continuing main shaft drives the thread take-up assembly, which continuously feeds the thread towards the needle. After the thread is kept at an appropriate slack, the thread cutting mechanism is driven to cut the thread. The appropriate angle is a certain amount of thread that can be driven to feed the thread take-up assembly towards the needle to prevent the thread end from coming out of the needle hole after cutting.

2. The method for cutting embroidery threads as described in claim 1, characterized in that: When thread cutting is required, lock the top thread and control the jump motor to work. The jump motor disengages the needle bar from the drive, while the main shaft of the embroidery machine continues to work and rotates at an appropriate angle. The continuing main shaft drives the thread take-up assembly, which continuously feeds the top thread towards the needle. After the top thread is kept at an appropriate slack, the thread cutting mechanism is driven to cut the thread.

3. The method for cutting embroidery threads as described in claim 1, characterized in that: When thread trimming is required, the jump motor is controlled to work. The jump motor disengages the needle bar from the drive, while the main shaft of the embroidery machine continues to work and rotates at an appropriate angle. The main shaft continues to work and drives the thread take-up assembly, which continuously feeds the thread towards the needle through the thread adjuster. After the thread is kept at an appropriate slack, the thread take-up spring on the thread adjuster is tightened when feeding the thread. After the thread is fed to maintain proper slack, the thread-cutting mechanism is driven to cut the thread. After cutting, the thread-taking spring on the thread adjuster returns to its original position, allowing the slack thread to maintain normal tension.

4. The method for cutting embroidery threads as described in claim 1, characterized in that: When thread cutting is required, the steps are as follows: 1) The hook knife hooks the thread, putting the thread in a taut state; 2) After the thread clamping structure locks the thread, the jump motor is controlled to work. The jump motor disengages the needle bar from the drive, while the main shaft of the embroidery machine continues to work and rotates at an appropriate angle. The continuing main shaft drives the thread take-up assembly, which continuously feeds the thread towards the needle. After the thread is kept at an appropriate slack, the hook knife of the thread cutting mechanism is driven to cut the thread.

5. The method for cutting embroidery threads as described in claim 4, characterized in that: The hook cutter stops at a point within 1 / 4 to 3 / 4 of its range of motion, keeping the thread taut.

6. The method for cutting embroidery threads as described in claim 2 or 4, characterized in that: When it is necessary to cut the thread, the thread is locked in place by the thread clamping structure.

7. The method for cutting embroidery threads as described in any one of claims 1-4, characterized in that: The appropriate angle for the spindle to rotate is one revolution.

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