Method for improving needle raising thread carrying effect of template and template machine

Abstract

The invention belongs to the technical field of sewing machines, and particularly relates to a method for improving the needle raising thread carrying effect of a template and a template machine, and the method comprises the following steps: S1, entering an internal circulation; s2, judging whether the current sewing needle number is smaller than or equal to the set needle number N, and if yes, entering the step S3; if not, entering the step S8; s3, compared with normal sewing, the height of a middle presser foot is reduced; s4, compared with normal sewing, the follow-up amplitude of the middle presser foot is reduced; s5, compared with normal sewing, the middle presser foot lifting opportunity lags behind; s6, in the ascending process of the take-up-lever, a thread loosening mechanism loosens threads; s7, in the descending process of the take-up-lever, the thread loosening mechanism closes thread loosening, and the step S1 is executed again; and S8, normally sewing, and returning to the step S1. According to the invention, the needle-lifting thread carrying rate can be improved, the needle-lifting thread loosening phenomenon is reduced, the rework rate is reduced, and the production efficiency is effectively improved.

Description

Technical Field:

[0001] The present invention belongs to the technical field of sewing machines, and particularly relates to a method for improving the effect of template starting and threading and a template machine. Background Art:

[0002] Template machines are important equipment in the field of garment processing and are widely used in industries such as garment manufacturing, shoe and hat manufacturing, and luggage manufacturing. With the development of technology, the functions and precision of these devices have been significantly improved, and improving the starting and threading rate is one of the key technologies for improving equipment performance. In the field of industrial sewing machines and special machines, the phenomenon of failure to thread during starting often occurs, and repeated processing for patching is required, seriously affecting production efficiency. Summary of the Invention:

[0003] The purpose of the present invention is to provide a method for improving the effect of template starting and threading and a template machine, which can improve the starting and threading rate, reduce the phenomenon of starting thread breakage, reduce the rework rate, and effectively improve production efficiency.

[0004] The present invention is implemented as follows:

[0005] One of the purposes of the present invention is to provide a method for improving the effect of template starting and threading, including the following steps:

[0006] S1. Enter the inner loop;

[0007] S2. Determine whether the current number of sewing stitches is less than or equal to the set number of stitches N. If so, enter step S3; if not, enter step S8;

[0008] S3. Compared with normal sewing, lower the height of the middle presser foot;

[0009] S4. Compared with normal sewing, reduce the following amplitude of the middle presser foot;

[0010] S5. Compared with normal sewing, delay the lifting time of the middle presser foot; [[ID=...]]

[0011] S6. During the rising process of the thread take-up lever, the thread loosening mechanism loosens the thread;

[0012] S7. During the descending process of the thread take-up lever, the thread loosening mechanism closes the thread loosening and returns to step S1;

[0013] S8. Sew normally and return to step S1.

[0014] In the above method for improving the effect of template starting and threading, in step S3, compared with normal sewing, the height of the middle presser foot is reduced by 0.3 mm - 0.5 mm.

[0015] In the above method for improving the effect of template starting and threading, in step S4, compared with normal sewing, the following amplitude of the middle presser foot is reduced by 40% - 60%. It should be noted that in the original text, there are some consecutive tags like ,

[0002] etc. without corresponding content in the English translation. I have left them as they are in the translation to maintain the integrity of the original text structure. Also, for the sake of space conservation, I have used "..." to represent the omitted part in the translation where the original text has consecutive tags without content. If you have any specific requirements or need further clarification, please let me know.

[0016] In the above method for improving the effect of starting sewing with a template and threading the thread, in step S5, compared with normal sewing, the timing of lifting the middle presser foot lags by 40°-70°.

[0017] In the above method for improving the effect of starting sewing with a template and threading the thread, the thread loosening mechanism is controlled by an electromagnet to loosen the thread and close the thread loosening.

[0018] In the above method for improving the effect of starting sewing with a template and threading the thread, the set number of stitches N is 3-12.

[0019] Another object of the present invention is to provide a template machine that performs sewing by using any of the above methods for improving the effect of starting sewing with a template and threading the thread.

[0020] The outstanding advantages of the present invention compared with the prior art are:

[0021] The present invention first determines whether it is the first few stitches before sewing. When it is the first few stitches before sewing, by reducing the height of the middle presser foot, reducing the follow-up amplitude of the middle presser foot, and lagging the timing of lifting the middle presser foot, the effect of starting sewing and threading the thread is effectively improved; by loosening the thread by the thread loosening mechanism when the thread take-up lever takes up the thread, the phenomenon of thread breakage at the start of sewing is effectively prevented; thus, the present invention can improve the rate of starting sewing and threading the thread, reduce the occurrence of thread breakage at the start of sewing, reduce the rework rate, and effectively improve the production efficiency. Description of the drawings:

[0022] Figure 1 is the control flow chart of the present invention;

[0023] Figure 2 is the three-dimensional structure diagram of the present invention.

[0024] Reference numerals: 1, middle presser foot; 2, thread take-up lever; 3, main shaft motor. Detailed implementation manners:

[0025] The following further describes the present invention with specific embodiments. Refer to Figure 1 —2:

[0026] One object of the present invention is to provide a method for improving the effect of starting sewing with a template and threading the thread, including the following steps:

[0027] S1. Enter the inner loop;

[0028] S2. Determine whether the current number of sewing stitches is less than or equal to the set number of stitches N. If so, enter step S3; if not, enter step S8;

[0029] S3. Compared with normal sewing, reduce the height of the middle presser foot 1;

[0030] S4. Compared with normal sewing, reduce the follow-up amplitude of the middle presser foot 1;

[0031] S5. When compared with normal sewing, delay the lifting timing of the presser foot 1;

[0032] S6. During the ascending process of the thread take-up lever 2, the thread loosening mechanism loosens the thread;

[0033] S7. During the descending process of the thread take-up lever 2, the thread loosening mechanism closes the thread loosening and returns to step S1;

[0034] S8. Normal sewing, return to step S1.

[0035] When starting to sew, to ensure that the starting stitch can carry the thread, by reducing the height of the presser foot 1 and the follow-up amplitude of the presser foot 1, the presser foot 1 presses the fabric and the thread end, so that the surface thread is pulled out from the direction of the thread spool, ensuring the stability of the thread end. By delaying the lifting timing of the presser foot 1 and lengthening the thread end clamping time, the present invention can effectively improve the effect of the starting stitch carrying the thread.

[0036] When starting to sew and taking in the thread, since the end of the surface thread cannot be fixed, the surface thread is likely to come out of the fabric when the thread take-up lever 2 takes up the thread, resulting in the problem of the starting stitch coming off the thread. In the present invention, during the ascending process of the thread take-up lever 2, the thread loosening mechanism loosens the thread, so that when the thread take-up lever 2 takes in the thread, it enters from the direction of the thread spool, thereby reducing the probability of the end of the surface thread being picked out and effectively reducing the occurrence of the starting stitch coming off the thread.

[0037] The present invention first judges whether it is the first few stitches before starting to sew. When it is the first few stitches before starting to sew, by reducing the height of the presser foot, reducing the follow-up amplitude of the presser foot and delaying the lifting timing of the presser foot, the effect of the starting stitch carrying the thread is effectively improved; by loosening the thread when the thread take-up lever 2 takes in the thread, the occurrence of the starting stitch coming off the thread is effectively prevented. Thus, the present invention can improve the starting stitch thread carrying rate, reduce the occurrence of the starting stitch coming off the thread, reduce the rework rate and effectively improve the production efficiency.

[0038] To make the presser foot 1 better press the fabric and the thread end, in step S3, when compared with normal sewing, the height of the presser foot is reduced by 0.3 mm - 0.5 mm. In this embodiment, when compared with normal sewing, the height of the presser foot is reduced by 0.4 mm.

[0039] To make the presser foot 1 better press the fabric and the thread end, in step S4, when compared with normal sewing, the follow-up amplitude of the presser foot is reduced by 40% - 60%. In this embodiment, during normal sewing, the follow-up amplitude of the presser foot is 2.6 mm; when the number of sewing stitches is less than or equal to the set number of stitches N, the follow-up amplitude of the presser foot is 1.3 mm, and when compared with normal sewing, the follow-up amplitude of the presser foot is reduced by 50%.

[0040] In order to better grip the thread end, in step S5, compared with normal sewing, the timing of the middle presser foot lifting lags behind by 40° - 70°. In this embodiment, during normal sewing, the middle presser foot lifts when the rotating shaft of the main shaft motor rotates to 250°. When the number of sewing stitches is less than or equal to the set number of stitches N, the middle presser foot lifts when the rotating shaft of the main shaft motor rotates to 300°, that is, compared with normal sewing, the timing of the middle presser foot lifting lags behind by 50°.

[0041] In order to facilitate the control of thread loosening, the thread loosening mechanism is controlled by an electromagnet to loosen and close the thread. By adjusting the current of the electromagnet, the amount of thread released is controlled to achieve thread loosening control within the corresponding angle range. In this embodiment, the electromagnet controls the thread loosening mechanism to loosen the thread during the rising process of the thread take-up lever, that is, during the process when the rotating shaft of the main shaft motor rotates from 320° to 20°.

[0042] Furthermore, the set number of stitches N is 3 - 12. In this embodiment, the set number of stitches N is 8, that is, when the number of sewing stitches is 1 - 8, steps S3 - S7 are executed, and when the number of sewing stitches is 9, normal sewing starts.

[0043] Without adding any components, the present invention introduces a software algorithm based on existing devices to plan the electro-mechanical motion control, achieving the best effect of starting the needle and carrying the thread.

[0044] The present invention performs precise control according to the set mode, effectively improving the effect of starting the needle and carrying the thread, reducing the occurrence of thread detachment during starting the needle, and can greatly improve the sewing effect and production efficiency of the product.

[0045] Another object of the present invention is to provide a template machine that performs sewing using any of the above methods for improving the starting needle and carrying thread effect of the template.

[0046] The above embodiments are only one of the preferred embodiments of the present invention, and do not limit the scope of implementation of the present invention. Therefore, all equivalent changes made according to the shape, structure, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A method for improving the effect of starting a stitch and carrying the thread with a template, characterized in that: It includes the following steps: S1. Enter the inner loop; S2. Determine whether the current number of sewing stitches is less than or equal to the set number of stitches N. If so, go to step S3; if not, go to step S8; S3. Lower the height of the middle presser foot compared to normal sewing; S4. Reduce the follow-up amplitude of the middle presser foot compared to normal sewing; S5. Delay the timing of raising the middle presser foot compared to normal sewing; S6. When the thread take-up lever rises, the thread loosening mechanism loosens the thread; S7. When the thread take-up lever descends, the thread loosening mechanism closes the thread loosening and returns to step S1; S8. Sew normally and return to step S1.

2. A method for improving the effect of starting a stitch and threading with a template according to claim 1, characterized in that: In step S3, the height of the middle presser foot is reduced by 0.3 mm - 0.5 mm compared to normal sewing.

3. A method for improving the effect of starting a stitch and threading with a template according to claim 1, characterized in that: In step S4, the follow-up amplitude of the middle presser foot is reduced by 40% - 60% compared to normal sewing.

4. A method for improving the effect of starting a stitch and threading with a template according to claim 1, characterized in that: In step S5, the timing of raising the middle presser foot is delayed by 40° - 70° compared to normal sewing.

5. A method for improving the effect of starting a needle with a template and threading a thread according to claim 1, characterized in that: The thread loosening mechanism is controlled by an electromagnet to loosen and close the thread.

6. A method for improving the effect of starting a stitch and threading a thread with a template according to claim 1, characterized in that: The set number of stitches N is 3 - 12.

7. A template machine, characterized in that: Sew using the method for improving the effect of starting sewing with the template described in any one of claims 1 - 6.

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