A sewing machine for processing a wig

Abstract

The utility model belongs to the wig production technical field, especially relate to a sewing machine for processing wig, it includes presser foot and feed dog, presser foot lower part sets up sewing needle through -hole, presser foot bottom sets up recess, recess is provided with the limiting step, the limiting step is along the feed dog direction setting and sets up one side at sewing needle through -hole, the number of limiting step is one, two or more, the utility model provides a sewing machine for processing wig, it can be applicable to the hair curtain piece operation, improves the production efficiency and the hair curtain sewing line made is neat.

Description

Technical Field

[0001] This utility model belongs to the field of wig manufacturing technology, and in particular relates to a sewing machine for processing wigs. Background Technology

[0002] In the wig production process, several steps require the use of sewing machines. For example, after a single hairpiece is made, it needs to be joined together to make the hairpiece look neat. When joining the hairpiece, the single hairpiece needs to be folded in half, the two layers of hair shafts aligned, and a fixing line (sewing thread) is sewn at the overlapping hair shafts. However, there is no sewing machine specifically designed for wig production in the current technology. Most commercially available sewing machines are designed for sewing fabric pieces or other materials, which are not suitable for joining wig hairpieces. This often results in uneven stitching, slow efficiency, and high skill requirements for the machine operator.

[0003] For example, Chinese invention patent application 202210029012.1, "A Sewing Machine Base Plate with Constant Pressure," discloses a technical solution including a connecting frame. The bottom of the connecting frame is movably connected to a presser foot. The left end of the presser foot is detachably connected to a head-up seat assembly. A roller groove is formed at the center of the bottom of the presser foot. A rotating shaft is rotatably connected to the inner wall of the roller groove. Two sets of rotating shafts are symmetrically arranged on the left and right sides. Rollers are fixedly installed on the outer walls of both sets of rotating shafts. The outer walls of the rollers are provided with anti-slip textures and are tangent to the bottom of the presser foot. This technology limits the head-up seat by setting a limiting pin inserted inside a rectangular plug block. This allows the operator to squeeze the pressing plate with their fingers, facilitating the inward contraction of the elastic locking block. It also allows for adjustment of the distance between the two sets of head-up seats according to the sewing material, thus facilitating the adjustment of the pressing angle of the head-up seat on the sewing material and improving the stability of the presser foot when moving on top of the sewing material.

[0004] For example, Chinese Utility Model Patent 200520039386.3, entitled "A Dual-Purpose Coverstitching and Trouser Loop Machine," discloses the following technical solution: It mainly includes a coverstitching machine, with a trouser loop feeding mechanism fixed on the feed dog of the coverstitching machine, a trouser loop cutting mechanism on the machine casing, and a main presser foot and a secondary presser foot fixed on the presser foot bar of the coverstitching machine, the secondary presser foot extending in front of the main presser foot; a trouser loop hemming device is fixed on the worktable below the presser feet, located between the main and secondary presser feet. The advantage of this technology is that the improved dual-purpose machine can function as both a coverstitching machine and a trouser loop machine, offering two uses in one machine and helping enterprises save costs.

[0005] For example, Chinese utility model patent 202221283209.X, "A Feeding Device for Sewing Simulated Animal Fur," discloses the following technical solution: It includes a feeding component and a mounting plate installed on a workbench. The feeding component is hinged to one end of the mounting plate via a connecting rod. The feeding component includes an upper pressure plate, a feather-pulling plate, and a lower base plate disposed at the end of the connecting rod. The upper and lower pressure plates form an exit pressure angle at the exit of the animal fur, and the feather-pulling plate is located at the middle position of the exit pressure angle. A feeding channel for the simulated fur is formed between the upper and lower pressure plates and the feather-pulling plate. The beneficial effect of this technology is that by setting the feather-pulling plate and the base plate at the feeding point of the sewing machine, long fibers are drawn inward when the simulated animal fur is sewn through the feeding channel, preventing long fibers from clogging the presser feet and reducing sewing machine malfunctions. A length adjustment device is provided on the connecting rod, which can reasonably adjust the position of the feeding part at the bottom of the sewing machine.

[0006] However, none of the above-mentioned technical solutions provided in the existing technology are suitable for the operation of curtain splicing. Utility Model Content

[0007] To address the aforementioned problems in the existing technology, the purpose of this utility model is to provide a sewing machine for processing wigs, which is suitable for hair flap assembly operations, improves production efficiency, and produces hair flaps with neat stitches.

[0008] To achieve the above objectives, the technical solution adopted by this utility model is as follows: it includes a presser foot and a feed dog; a sewing needle through hole is provided at the lower part of the presser foot, and a groove is provided at the bottom of the presser foot; a limiting step is provided in the groove, the limiting step is provided along the direction of the feed dog and is located on one side of the sewing needle through hole; the number of limiting steps is one, two or more.

[0009] The optimized version has two or more limiting steps. The limiting steps can be set on the same side of the sewing needle hole or on both sides of the sewing needle hole.

[0010] The optimized design has two limiting steps, both located on the same side of the sewing needle hole.

[0011] The optimized groove is wider at the bottom and narrower at the top.

[0012] The optimized groove is arc-shaped.

[0013] The optimized groove width is 6-8mm and the groove depth is 1-3mm.

[0014] The optimization also includes a material guiding device; the material guiding device includes a front guide plate and a front pressure plate, with the front guide plate located diagonally in front of the pressure foot.

[0015] The optimized angle between the direction of the front guide plate and the direction of the feed dog is 10-80°.

[0016] The optimized design features an upward-curving front pressure plate.

[0017] The optimized feed dog has two rows of teeth with different lengths; the longer row of teeth is located on one side of the sewing needle hole, and the shorter row of teeth is located behind the sewing needle hole.

[0018] In the prior art, feed dogs are generally provided with two or more rows of teeth arranged in parallel. In this utility model, the "direction of feed dogs" or "feed dog direction" refers to the direction parallel to a single row of teeth, that is, the conveying direction of the feed dog at the bottom of the presser foot.

[0019] In existing technologies, fabric materials are typically conveyed in a straight line within the presser foot groove. However, hair flaps are made of stiff materials and the hair strands are arranged horizontally (i.e., perpendicular to the direction parallel to the single row of teeth of the feed dog). When conveyed at the bottom of the presser foot, they often deviate from the straight line, or even move from inside the groove to the outside. This results in uneven stitching on the hair shaft, and may even prevent the hair flap from being conveyed at the bottom of the presser foot. This requires manual adjustment of the hair flap at any time, or even stopping the conveyor for manual adjustment, which seriously affects production efficiency. In addition, manual adjustment not only requires high levels of worker experience, but also results in uneven and inconsistent stitching on the hair shaft.

[0020] This invention features a limiting step within a groove, positioned along the feed dog direction and located on one side of the sewing needle hole. The limiting step can be one, two, or more. By setting the limiting step and scientifically determining its position and number, the hairpiece and hair stem can be kept within the groove, preventing them from moving outside, thus improving hairpiece conveying and production efficiency, and simultaneously enhancing the neatness of the fixing lines sewn on the two layers of hair stem.

[0021] In theory, the neatness of the stitching on both layers of hairpieces is highest if the hairpieces and hair shafts can pass through the sewing needle hole in a straight line. Furthermore, when there are two or more limiting steps, the limiting steps can be all set on the same side of the sewing needle hole, or they can be set on both sides of the sewing needle hole, in order to further limit the range of movement of the hairpieces and hair shafts within the groove.

[0022] Furthermore, there are two limiting steps, both located on the same side of the sewing needle hole, which can further prevent the hair strands from deviating from the sewing needle hole inside the groove, help adjust the hair strands to be transmitted in a straight line, and further improve the neatness of the fixing lines sewn on the two layers of hair strands.

[0023] The groove width refers to the length of the bottom surface of the groove in a direction perpendicular to the direction of fabric feeding (feed dog direction) when the presser foot is in the working state. The groove depth refers to the distance from the bottom surface of the groove to the top surface of the groove when the presser foot is in the working state.

[0024] Existing presser foot grooves are generally rectangular through holes with a uniform width from top to bottom. While suitable for fabrics, they hinder the passage of hair curtains, affecting conveying efficiency. The presser foot groove of this invention is wider at the bottom and narrower at the top. When the presser foot is in operation, the groove's width gradually decreases from bottom to top, with a wider bottom surface and a narrower top surface. Given the relatively stiff material of the hair curtain and hair shaft, and the fact that several hair strands in the hair curtain are arranged laterally (perpendicular to the direction parallel to the single row of teeth on the feed dog), designing the groove as wider at the bottom and narrower at the top is suitable for the material and structure of the hair curtain, facilitating continuous and smooth passage and improving conveying efficiency.

[0025] Furthermore, the groove is arc-shaped, meaning that the inner surface of the groove is a smooth arc shape (excluding the part involved in the limiting step), in order to reduce the resistance of the hair curtain to forward transmission and facilitate smooth transmission.

[0026] Compared with existing technologies, reducing the groove depth and increasing the groove width (6-8mm for the groove width and 1-3mm for the groove depth) can better suit the structure and material of the hair flap, allowing the hair flap to pass smoothly, continuously, and efficiently through the presser foot.

[0027] This utility model also includes a material guiding device, which includes a front guide plate and a front pressure plate, used to guide the hair curtain and hair strands before the hair curtain enters the presser foot so that the hair curtain can be transported smoothly.

[0028] The front guide plate is located diagonally in front of the presser foot, which means that the conveying direction of the curtain is: the curtain and the hair strand first move along the front guide plate of the guide device, then enter the bottom of the presser foot and are conveyed along the direction of the feed dog, and sewing is performed when passing through the sewing needle hole; however, the front guide plate is not located directly in front of the presser foot, that is, in the above process, the curtain and the hair strand do not move in a straight line throughout, but there is a certain angle between the direction of the front guide plate and the direction of the feed dog.

[0029] In existing technologies, fabric is typically fed in a straight line before and after entering the bottom of the presser foot. However, the fabric of the hair flap is relatively stiff and the hair strands are arranged in a transverse direction (i.e., perpendicular to the direction parallel to the single row of teeth of the feed dog). If the hair flap stem is preset to be fed in a straight line directly in front of the presser foot before entering the bottom of the presser foot, the hair flap stem will deviate during the feeding process. When it actually approaches the bottom of the presser foot, it deviates from the straight line, resulting in the stitches being unevenly arranged on the hair flap, or even preventing the hair flap from smoothly entering the bottom of the presser foot. This requires manual adjustment of the hair flap at any time before entering the presser foot, or even stopping the feeding for manual adjustment, which seriously affects the production efficiency. At the same time, manual adjustment requires a high level of worker experience and results in uneven and inconsistent stitches on the hair flap.

[0030] The working process of this utility model is as follows: The operator sits in front of the sewing machine operating table, with the presser foot and feed dog set up vertically on the sewing machine. When performing the assembly operation on the hair curtain, the hair curtain is first folded in half along the length of the hair stem to form two layers of hair stem, aligning the two free ends, aligning the two layers of hair stem, and then attaching and straightening them. Then, the two aligned free ends are fed into the bottom of the presser foot. The subsequent hair curtain hair stems (starting sections) are aligned, attached to the front guide plate of the guide device, and placed below the front pressure plate. The subsequent hair curtain hair stems are then aligned and straightened along the direction of the front guide plate. As the sewing machine fixes the two free ends with thread, the feed dog conveys the hair curtain forward, and the subsequent hair curtain hair stems are conveyed forward along the direction of the front guide plate. Although the front guide plate is located diagonally in front of the presser foot, the regular combined push of the hair curtain during the sewing and feeding process of the sewing needle and feed dog, combined with the material and structure of the hair curtain, can correct the direction of travel of the subsequent hair curtain. Finally, when the subsequent hair curtain and hair strands transmitted along the direction of the front guide plate travel to the bottom of the presser foot, they can enter the bottom of the presser foot in a straight line with the previous hair curtain and hair strands and be sewn when passing through the sewing needle hole.

[0031] The front guide plate guides the hair curtain and hair strands to be conveyed along a certain direction of travel. The front pressure plate keeps the hair curtain and hair strands moving below the front pressure plate. The position and structure of the material guiding device can make the hair curtain and hair strands enter the bottom of the presser foot in a straight line, improving the conveying and production efficiency of the hair curtain, while also improving the neatness of the fixed lines sewn on the two layers of hair strands.

[0032] The angle between the direction of the front guide plate and the direction of the feed dog refers to the angle at which the hair curtain stem (starting section) is set to fit against the front guide plate before entering the bottom of the presser foot, and deviates from the direction of the feed dog. It is set to 10-80°, and the specific setting is related to the material of the hair curtain, the sewing speed, and the sewing operation method.

[0033] The front pressure plate is tilted upwards, meaning it's not a horizontal plate but rather tilted upwards relative to the horizontal plane. This increases the movement space of the hair curtain compared to a horizontal setting, thus improving its flexibility and the smoothness of the conveyor. It also facilitates placing the initial section of the hair curtain and its stem below the front pressure plate. The specific angle and manner in which the front pressure plate is tilted depend on the material of the hair curtain, the sewing speed, and the sewing operation method.

[0034] The feed dog has two rows of teeth of different lengths. The longer row of teeth is positioned on one side of the sewing needle hole, while the shorter row is positioned behind it. This means the longer row of teeth continuously feeds the hair before and after the sewing needle passes through the hair curtain, while the shorter teeth only directly contact and feed the sewn hair curtain stem. Existing feed dogs typically have three rows of teeth, suitable for feeding soft fabrics. This invention uses two rows of teeth for feeding below the hair curtain. The number, length, and arrangement of the two rows of teeth are adapted to the structure and material of the hair curtain, enabling smooth transmission of the hair curtain.

[0035] In summary, the beneficial effects of this utility model are as follows: This utility model provides a sewing machine for processing wigs. By setting a limiting step, it can keep the hair flap and hair shaft transmitted inside the groove and prevent the hair flap and hair shaft from moving outside the groove. It can be used for hair flap assembly operations, improves production efficiency and produces hair flaps with neat stitches.

[0036] Furthermore, the position, quantity, and structural arrangement of the limiting steps and grooves ensure that the hair curtain and hair shaft are transmitted in a straight line at the bottom of the presser foot.

[0037] Furthermore, the position and structure of the guiding device enable the hair curtain and hair shaft to enter the bottom of the presser foot in a straight line, improving the efficiency of hair curtain conveying and the neatness of the fixed lines sewn on the two layers of hair shaft.

[0038] Furthermore, the number, length, and arrangement of the feeding teeth in this invention are adapted to the structure and material of the hair curtain, which can ensure smooth transmission of the hair curtain and improve conveying efficiency.

[0039] In summary, this utility model, through the combination of presser foot, feed dog and material guide device, is more suitable for the assembly operation of hair curtains. Attached Figure Description

[0040] Figure 1 A schematic diagram of a sewing machine for processing wigs provided by this utility model; Figure 2 A schematic diagram of the presser foot provided by this utility model; Figure 3 This is a schematic diagram of the feed dog provided by this utility model.

[0041] Legend: 1. Presser foot; 2. Feed dog; 3. Material guide device; 4. Front guide plate; 5. Front pressure plate; 6. Groove; 7. Limiting step; 8. Tooth; 9. Sewing needle through hole. Detailed Implementation

[0042] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0043] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0044] The technical solution adopted in this embodiment is as follows: a sewing machine for processing wigs, which includes a presser foot 1 and a feed dog 2; a sewing needle through hole 9 is provided at the lower part of the presser foot 1, and a groove 6 is provided at the bottom of the presser foot 1; a limiting step 7 is provided in the groove 6, and the limiting step 7 is provided along the direction of the feed dog and is provided on one side of the sewing needle through hole 9; the number of limiting steps 7 is one, two or more.

[0045] The number of limiting steps 7 is two or more. The limiting steps 7 can be all set on the same side of the sewing needle hole 9, or they can be set on both sides of the sewing needle hole 9 respectively.

[0046] There are two limiting steps 7, and both are located on the same side of the sewing needle hole 9.

[0047] Among them, groove 6 is wider at the bottom and narrower at the top.

[0048] Among them, groove 6 is arc-shaped.

[0049] The groove width is 6-8mm and the groove depth is 1-3mm.

[0050] It also includes a material guiding device 3; the material guiding device 3 includes a front guide plate 4 and a front pressure plate 5, with the front guide plate 4 located diagonally in front of the pressure foot.

[0051] The angle between the direction of the front guide plate and the direction of the feed dog is 10-80°.

[0052] Among them, the front pressure plate 5 is tilted upwards.

[0053] The feed dog 2 is provided with two rows of teeth 8, and the two rows of teeth 8 are of different lengths; the longer row of teeth is located on one side of the sewing needle hole 9, and the shorter row of teeth is located behind the sewing needle hole 9.

[0054] See attached document Figure 1-3 , attached Figure 1 The presser foot 1 and feed dog 2 are positioned vertically and vertically on the sewing machine; the front guide plate 4 of the guide device 3 is positioned diagonally in front of the presser foot.

[0055] Appendix Figure 2 To clearly demonstrate the internal structure of groove 6, presser foot 1 is not in the working state, but rather inverted. (Attached) Figure 2There are two middle limit steps 7, both of which are set on the same side of the sewing needle through hole 9.

[0056] Appendix Figure 3 This is a schematic diagram of the feed dog 2. In this embodiment, the feed dog 2 is configured as two rows of parallel teeth 8, with different lengths. The left row of teeth is longer and, in the working state, is located on one side of the needle hole 9. Figure 1 A portion can be seen in the image; the right row of teeth is shorter and, when in operation, is located behind the sewing machine through hole 9. Figure 1 It was not displayed in the image.

[0057] In this utility model, "feeding tooth direction" refers to the direction parallel to the single row of teeth, as shown in the attached figure. Figure 3 As shown.

[0058] Combined with appendix Figure 1-3 In the sewing machine provided in this embodiment, when in operation, the longer row of teeth is located on the left side of the sewing needle hole 9, while the front guide plate 4 and the two limiting steps are located on the right side of the sewing needle hole 9. However, in actual operation, the specific placement of the longer row of teeth, the front guide plate, and the limiting steps on which side of the sewing needle hole is located can be adjusted according to the design of other components of the sewing machine and the sewing method.

[0059] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A sewing machine for processing wigs, characterized in that: It includes a presser foot and a feed dog; a sewing needle through hole is provided at the lower part of the presser foot, and a groove is provided at the bottom of the presser foot; a limiting step is provided in the groove, and the limiting step is provided along the direction of the feed dog and is located on one side of the sewing needle through hole; the number of limiting steps is one, two or more.

2. A sewing machine for processing wigs according to claim 1, characterized in that: The number of limiting steps is two or more. The limiting steps can be set on the same side of the sewing needle hole or on both sides of the sewing needle hole.

3. A sewing machine for processing wigs according to claim 2, characterized in that: There are two limiting steps, both of which are located on the same side of the sewing needle hole.

4. A sewing machine for processing wigs according to claim 1, characterized in that: The groove is wider at the bottom and narrower at the top.

5. A sewing machine for processing wigs according to claim 4, characterized in that: The groove is arc-shaped.

6. A sewing machine for processing wigs according to claim 4, characterized in that: The groove width is 6-8mm and the groove depth is 1-3mm.

7. A sewing machine for processing wigs according to claim 1, characterized in that: It also includes a material guiding device; the material guiding device includes a front guide plate and a front pressure plate, with the front guide plate located diagonally in front of the pressure foot.

8. A sewing machine for processing wigs according to claim 7, characterized in that: The angle between the direction of the front guide plate and the direction of the feed dog is 10-80°.

9. A sewing machine for processing wigs according to claim 7, characterized in that: The front pressure plate is tilted upwards.

10. A sewing machine for processing wigs according to any one of claims 1-9, characterized in that: The feed dog has two rows of teeth with different lengths; the longer row of teeth is located on one side of the sewing needle hole, and the shorter row of teeth is located behind the sewing needle hole.

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