Method for manufacturing underpants

Abstract

The invention relates to the field of clothing manufacturing, in particular to a method for manufacturing underpants. Comprising the following steps: step 1, respectively taking out a main material and an inner crotch from a first stock bin and a second stock bin in a single sheet form; 2, the main material and the inner crotch are fed into an assembling unit to be sewn into a plane semi-finished product; step 3, feeding the planar semi-finished product into a sewing unit through a transfer track; fourthly, the plane semi-finished product with the rubber band enters a positioning unit through a transferring track, and the positioning unit is connected with two sets of positioning points on the plane semi-finished product and drags the two sets of positioning points to preset marking positions; 5, a folding unit arranged close to the positioning unit is pulled to enter any set of positioning points at the marked position and covers the other set of positioning points, and the plane semi-finished product is sewn into finished underpants; and 6, driving the bottom crotch in the finished underpants to turn from one end of the waist of the underpants to the other end by the reversing unit, so that the sewing thread of the finished underpants in the step 5 is positioned on the inner side of the finished underpants.

Description

Technical Field

[0001] The present invention relates to the field of clothing manufacturing, and particularly to a method for manufacturing underwear. Background Art

[0002] In the traditional underwear manufacturing process, the sewing of the main material and the crotch lining highly depends on manual operation, which not only has low efficiency but also has significant hygiene hazards. In the manual sorting, edging and sewing processes, the operator needs to frequently contact the raw materials and semi-finished products, which is likely to introduce pollutants such as sweat, dandruff or environmental dust, affecting the product cleanliness and making it difficult to meet the hygiene standards of medical-grade or high-end underwear. In addition, the traditional workshop environment is open, and the fabric is easily adsorbed with impurities when exposed to the air, and the manual folding and alignment process is likely to cause secondary pollution of the materials. Although semi-automatic equipment can partially replace manual labor, it still requires manual intervention for positioning and adjustment and cannot achieve fully enclosed production, so the hygiene risk still exists. Summary of the Invention

[0003] The object of the present invention is to provide a method for manufacturing underwear to solve the problem of low automation in the existing underwear manufacturing process.

[0004] The technical solution of the present invention is: A method for manufacturing underwear, the underwear includes a main material and a crotch lining sewn on the main material, and the manufacturing method includes the following steps:

[0005] Step 1: Take out the main material and the crotch lining from the first material bin and the second material bin in the form of single pieces respectively;

[0006] Step 2: Feed the main material and the crotch lining into the assembly unit and sew them into a flat semi-finished product;

[0007] Step 3: Feed the flat semi-finished product into the sewing unit through the transfer track, and the sewing unit adds elastic bands to the periphery of the flat semi-finished product;

[0008] Step 4: The flat semi-finished product with elastic bands enters the positioning unit through the transfer track. The positioning unit connects two groups of positioning points on the flat semi-finished product and respectively pulls the two groups of positioning points to the preset marked positions;

[0009] Step 5: The folding unit arranged adjacent to the positioning unit pulls any one group of positioning points that enter the marked position and covers it on the other group of positioning points, so that the flat semi-finished product can be sewn into a finished underwear;

[0010] Step 6: The reversing unit arranged adjacent to the folding unit drives the bottom of the finished underwear to turn from one end of the underwear waist to the other end, so that the seam in Step 5 is inside the finished underwear.

[0011] Preferably, in the first step, the inner crotch is taken out from the second bin by a material taking mechanism, and a hemming mechanism is provided to hem the inner crotch taken out from the second bin.

[0012] Preferably, the material taking mechanism includes a material taker and a material taking press block; a material taking groove is formed at the bottom end of the material taking press block, and the material taking press block is driven by a press block driver to abut against the inner crotch in the second bin, so that the part of the inner crotch corresponding to the material taking groove enters the material taking groove; the material taker is driven by a material taking driver to enter the material taking groove and penetrate through the part of the inner crotch located in the material taking groove.

[0013] Preferably, a sewing fixture is arranged on the transfer track, and the sewing fixture has positioning pins corresponding to the flat semi-finished product, and the positioning pins can pierce and fix the flat semi-finished product.

[0014] The sewing unit includes a straight-edge sewing mechanism and an arc-edge sewing mechanism.

[0015] Preferably, the positioning unit includes a plurality of positioning jaws, any of the positioning jaws is connected with a positioning driver, and a positioning detector is arranged corresponding to a preset marking point; the positioning jaws clamp the positioning points on the flat semi-finished product and, driven by the positioning driver, cooperate with the positioning detector to enter the preset marking point.

[0016] Preferably, the folding unit includes folding jaws, a linear driving mechanism and a flipping mechanism. The folding jaws are connected to the linear driving mechanism through the flipping mechanism and rotate around the horizontal axis and move in the vertical and horizontal planes respectively under the drive of the flipping mechanism and the linear driving mechanism.

[0017] Preferably, the reversing unit includes an opening assembly and a reversing driving plate. The two sides of the opening assembly relative to a horizontal plane are set as two groups, and the reversing driving plate runs through the gap between the two groups of opening assemblies.

[0018] Preferably, both groups of the opening assemblies include an opening connector and an opening driving mechanism. A pair of opening connectors are connected to the front and rear sides of the waist of the finished underwear and perform an opening and closing movement under the drive of the opening driving mechanism.

[0019] Compared with the prior art, the advantages of the present invention are:

[0020] The present invention integrates a material taking mechanism, an assembling unit, a sewing unit, a positioning unit, a folding unit and a reversing unit into one, and drives the flat semi-finished product or the finished underwear of the underwear to run in the above-mentioned various mechanisms through a transfer track and a transfer fixture, realizing the automatic production of the underwear without manual intervention and avoiding the pollution caused by manual contact. Description of the Drawings

[0021] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0022] Figure 1 It is a process flow diagram of a method for manufacturing underwear according to the present invention;

[0023] Figure 2 It is a top view of the equipment required for a method for manufacturing underwear according to the present invention;

[0024] Figure 3 It is a partial structure diagram of the equipment required for a method for manufacturing underwear according to the present invention;

[0025] Figure 4 It is a structure diagram of the second material bin and the material taking mechanism according to the present invention;

[0026] Figure 5 It is a structure diagram of the material taking mechanism according to the present invention;

[0027] Figure 6 It is a structure diagram of the edge wrapping mechanism and the lifting mechanism according to the present invention;

[0028] Figure 7 It is a structure diagram of the sewing jig according to the present invention;

[0029] Figure 8 It is a structure diagram of the positioning unit according to the present invention;

[0030] Figure 9 It is a structure diagram of the positioning jaw and the positioning driver according to the present invention;

[0031] Figure 10 It is a structure diagram of the folding unit according to the present invention;

[0032] Figure 11 It is a structure diagram of the inversion unit according to the present invention

[0033] Figure 12 It is a schematic diagram of the positioning points on the flat semi-finished product according to the present invention;

[0034] Wherein:

[0035] 11. First material bin, 12. Second material bin, 13. Main material grabbing mechanism, 14. Material taking mechanism, 141. Material taking device, 142. Material taking pressing block, 143. Material taking groove, 144. Material taking driver, 15. Edge wrapping mechanism, 151. Edge wrapping positioning plate, 152. Edge wrapping plate, 16. Lifting mechanism;

[0036] 2. Assembly unit;

[0037] 3. Sewing unit, 31. Straight edge sewing mechanism, 32. Arc edge sewing mechanism,

[0038] 4. Transfer track;

[0039] 5. Sewing jig, 51. Pressing plate, 52. Bottom plate, 53. Positioning pin, 54. Jig driving mechanism, 55. Magnetic attraction assembly, 56. Connection hole;

[0040] 6. Positioning unit, 61. Positioning jaw, 62. Positioning driver, 63. Positioning detector;

[0041] 7. Folding unit, 71. Folding jaw, 72. Linear driving mechanism, 73. Flipping mechanism;

[0042] 8. Reversing unit, 81. Opening assembly, 811. Opening connector, 812. Opening driving mechanism, 82. Reversing driving plate. Detailed implementation manners

[0043] The following further elaborates on the content of the present invention in conjunction with specific embodiments:

[0044] As Figure 1 shown, an underwear manufacturing method, the underwear includes a main material and a crotch sewn on the main material. The manufacturing method includes the following steps:

[0045] Step 1, respectively take out the main material and the crotch in the form of single pieces from the first material bin 11 and the second material bin 12 as Figure 3 shown.

[0046] Specifically, a main material grasping mechanism 13 is provided corresponding to the first material bin 11. The main material grasping mechanism 13 has material taking jaws corresponding to the corners of the main material. The material taking jaws clamp the corners of the main material, take out the single-piece main material from the first material bin 11 and place it on the transfer track 4.

[0047] As Figure 4 shown, a material taking mechanism 14 is provided corresponding to the second material bin 12. The material taking mechanism 14 includes a material taking device 141 and a material taking pressing block 142 as Figure 5 shown. A material taking groove 143 is opened at the bottom end of the material taking pressing block 142. Driven by the pressing block driver, it abuts against the crotch in the second material bin 12, so that the part of the crotch corresponding to the material taking groove 143 enters the material taking groove 143. The material taking device 141 enters the material taking groove 143 driven by the material taking driver 144, penetrates through the part of the crotch located in the material taking groove 143, and takes out the penetrated crotch from the second material bin 12.

[0048] Moreover, the crotch taken out by the material taking mechanism 14 will be sent into as Figure 6Edge hemming is performed in the edge hemming mechanism 15 shown. The edge hemming mechanism 15 includes an edge hemming positioning plate 151 and an edge hemming plate 152. The edge hemming positioning plate 151 presses the crotch, and at this time, the outer edge line of the edge hemming positioning plate 151 will be used as the positioning edge during edge hemming. Subsequently, a pair of edge hemming plates 152 perform an opening and closing action in the horizontal direction, folding the edge of the crotch towards the middle, thereby realizing the edge hemming action of the crotch.

[0049] Step two, feed the main material and the crotch into the assembly unit 2 so that the main material and the crotch are sewn into an integral planar semi-finished product.

[0050] Specifically, in combination with Figure 3 and Figure 6 shown, the assembly unit 2 is arranged above the edge hemming mechanism 15. The edge-hemmed crotch enters the assembly unit 2 through the lifting mechanism 16. At this time, the main material is taken out from the transfer track 4 by the assembly manipulator, placed in the assembly unit 2 and covered above the crotch. A sewing machine is arranged in the assembly unit 2 for sewing the crotch on the main material.

[0051] Step three, the planar semi-finished product is fed into the sewing unit 3 through the transfer track 4. As Figure 2 shown, a straight-edge sewing mechanism 31 and an arc-edge sewing mechanism 32 are arranged in the sewing unit 3, which are respectively used for sewing the elastic band on the straight edge and the arc edge of the planar semi-finished product.

[0052] Specifically, sewing jigs 5 as Figure 7 shown are arranged on the transfer track 4 corresponding to the straight-edge sewing mechanism 31 and the arc-edge sewing mechanism 32. The sewing jig 5 includes a split-type pressing plate 51 and a bottom plate 52. Among them, the bottom plate 52 is connected to the transfer track 4 through a triangular connection hole 56 and runs on the straight-edge sewing mechanism 31 and the arc-edge sewing mechanism 32 along with the transfer track 4. And the surface of the bottom plate 52 close to the pressing plate 51 is set as a loading surface for carrying the fabric. Positioning pins 53 are fixed on the loading surface. The positioning pins 53 are arranged in multiple numbers corresponding to the fabric profiling. When the fabric is placed on the loading surface, the positioning pins 53 can pierce the planar semi-finished product, thereby positioning multiple points on the planar semi-finished product and preventing the planar semi-finished product from shrinking and deforming.

[0053] The top end of the pressing plate 51 is connected with a jig driving mechanism 54. The jig driving mechanism 54 can drive the pressing plate 51 to buckle with the bottom plate 52. And the pressing plate 51 and the jig driving mechanism 54 are arranged in multiple numbers corresponding to the straight-edge sewing mechanism 31 and the arc-edge sewing mechanism 32. The pressing plate 51 is provided with positioning holes corresponding to all the positioning pins 53. During the buckling process, the positioning pins 53 can penetrate the positioning holes, so that the lower surface of the pressing plate 51 cooperates with the upper surface of the bottom plate 52 to press the fabric tightly. And the outer dimension of the pressing plate 51 is smaller than the outer dimension of the fabric, so that the sewn part on the fabric is exposed outside the pressing plate 51, thereby enabling the sewing machine to sew the fabric.

[0054] In a preferred embodiment of the present application, the bottom plate 52 is made of stainless steel, and a magnetic attraction assembly 55 is installed at one end of the pressing plate 51 away from the bottom plate 52. When the pressing plate 51 drives the positioning pin 53 on the bottom plate 52 to penetrate the positioning hole under the drive of the jig drive mechanism 54, the magnetic attraction assembly 55 generates a magnetic force on the bottom plate 52, so that the pressing plate 51 and the bottom plate 52 are magnetically connected. With such a setting, on the premise that the inner wall of the positioning hole does not abut against the positioning pin 53 and the jig drive mechanism 54 does not apply a pressing force to the pressing plate 51, the pressing plate 51 connected to the jig drive mechanism 54 can drive the bottom plate 52 to perform linear motion and rotational motion on the straight-edge sewing mechanism 31 and the arc-edge sewing mechanism 32 respectively.

[0055] Step Four: The flat semi-finished product with elastic bands enters the positioning unit 6 through the transfer track 4. The positioning unit 6 connects two groups of positioning points on the flat semi-finished product (such as Figure 12 A1-A4 and B1-B4 shown), and respectively pulls the two groups of positioning points to preset marking positions;

[0056] Specifically, as shown in Figure 8 and Figure 9 shown, the positioning unit 6 includes a plurality of positioning jaws 61. Any positioning jaw 61 is connected with a positioning driver 62, and a positioning detector 63 is arranged corresponding to the preset marking point. The positioning jaws 61 move horizontally under the drive of two perpendicularly arranged positioning drivers 62, clamp the positioning points on the flat semi-finished product, and move towards the preset marking point. The detection end of the positioning detector 63 is correspondingly arranged at the marking point. When it is detected that the positioning points on the flat semi-finished product enter the marking point under the drive of the positioning jaws 61, the positioning driver 62 stops acting.

[0057] The purpose of this step is to make the front and rear corners of the flat semi-finished product align after folding, so as to facilitate the subsequent sewing of the flat semi-finished product into a finished underwear.

[0058] Step Five: The folding unit 7 arranged adjacent to the positioning unit 6 pulls any group of positioning points that enter the marking position and covers them on the other group of positioning points, so that the positioning points A1-A4 shown in Figure 12 correspond to the positioning points B1-B4 in sequence, so that the flat semi-finished product can be sewn into a finished underwear.

[0059] Specifically, as shown in Figure 10As shown in the figure, the folding unit 7 includes folding jaws 71, a linear drive mechanism 72, and a flipping mechanism 73. The folding jaws 71 are connected to the linear drive mechanism 72 through the flipping mechanism 73, and rotate around the horizontal axis and move in the vertical and horizontal planes under the drive of the flipping mechanism 73 and the linear drive mechanism 72 respectively. The two folding jaws 71 clamp one end of the flat semi-finished product and drive this end to fold towards the other end of the flat semi-finished product. During this period, the flipping mechanism 73 drives the folding jaws 71 to rotate synchronously with the movement of the linear drive mechanism 72. A sewing machine is provided in cooperation with the folding unit 7, and the sewing machine stitches the two folded and overlapped side edges, so that the flat semi-finished product forms a three-dimensional underwear finished product. However, at this time, the sewing line of the underwear finished product is on the outside.

[0060] Step 6: The reversing unit 8 provided adjacent to the folding unit 7 drives the crotch of the finished underwear to turn from one end of the underwear waist to the other end, so that the sewing line in Step 5 of the finished underwear is inside the finished underwear. As Figure 11 shown in the figure, the reversing unit 8 includes an opening assembly 81 and a reversing drive plate 82. Among them, the two sides of the opening assembly 81 relative to a horizontal plane are set as two groups, and the two groups of opening assemblies 81 are used to open the underwear finished product, and the opening can allow the crotch of the underwear and the reversing drive plate 82 to pass through. Subsequently, the reversing drive plate 82 abuts against the crotch of the underwear and drives the crotch to move towards the direction of the opening of the underwear and passes through the gap between the two groups of opening assemblies 81 until the crotch runs from one side of the underwear opening to the other side. Through this step, the front and back sides of the underwear can be reversed, so that the sewing line generated in the previous step is located inside the underwear.

[0061] Specifically, the opening assembly 81 includes an opening connector 811. In this embodiment, the opening connector 811 adopts a needle-punched suction cup and is used for detachably connecting with the underwear. The opening connector 811 is connected to the front and back sides of the waist of the finished underwear and runs in the vertical direction under the drive of the opening drive mechanism 812.

[0062] The above embodiments are only used to illustrate the technical concept and characteristics of the present invention. The purpose is to enable those who are familiar with this technology to understand the content of the present invention and implement it accordingly, and it cannot be used to limit the protection scope of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to include all changes falling within the meaning and scope of the equivalent elements of the claims in the present invention.

Claims

1. A method for manufacturing underwear, characterized in that, The underwear includes a main material and a crotch lining sewn on the main material. The manufacturing method includes the following steps: Step 1: Take out the main material and the crotch lining from the first material bin (11) and the second material bin (12) respectively in the form of single pieces; Step 2: Feed the main material and the crotch lining into the assembly unit (2) and sew them into a flat semi-finished product; Step 3: Feed the flat semi-finished product into the sewing unit (3) through the transfer track (4). The sewing unit (3) adds elastic bands to the periphery of the flat semi-finished product; Step 4: The flat semi-finished product with elastic bands enters the positioning unit (6) through the transfer track (4). The positioning unit (6) connects two groups of positioning points on the flat semi-finished product and pulls the two groups of positioning points to preset marked positions respectively; Step 5: The folding unit (7) arranged adjacent to the positioning unit (6) pulls any one group of positioning points that enter the marked position and covers it on the other group of positioning points, so that the flat semi-finished product can be sewn into finished underwear; Step 6: The reversing unit (8) arranged adjacent to the folding unit (7) drives the bottom crotch in the finished underwear to turn from one end of the underwear waist to the other end, so that the stitches in Step 5 are on the inner side of the finished underwear.

2. The method for manufacturing an underwear according to claim 1, wherein In Step 1, the crotch lining is taken out from the second material bin (12) by the material taking mechanism (14), and a hemming mechanism (15) is arranged to perform hemming operation on the crotch lining taken out from the second material bin (12).

3. A method for manufacturing underwear according to claim 2, characterized in that, The material taking mechanism (14) includes a material taking device (141) and a material taking pressing block (142); a material taking groove (143) is opened at the bottom end of the material taking pressing block (142), and it abuts against the crotch lining in the second material bin (12) under the drive of the pressing block driver, so that the part of the crotch lining corresponding to the material taking groove (143) enters the material taking groove (143); the material taking device (141) enters the material taking groove (143) under the drive of the material taking driver (144) and penetrates through the part of the crotch lining located in the material taking groove (143).

4. A method for manufacturing underwear according to claim 1, characterized in that, A sewing jig (5) is arranged on the transfer track (4). The sewing jig (5) has positioning pins (53) corresponding to the flat semi-finished product, and the positioning pins (53) can puncture and fix the flat semi-finished product; The sewing unit (3) includes a straight-edge sewing mechanism (31) and an arc-edge sewing mechanism (32).

5. A method for manufacturing underwear according to claim 1, characterized in that, The positioning unit (6) includes a plurality of positioning jaws (61). Any one of the positioning jaws (61) is connected with a positioning driver (62), and a positioning detector (63) is arranged corresponding to the preset marked point; the positioning jaws (61) clamp the positioning points on the flat semi-finished product and enter the preset marked point under the drive of the positioning driver (62) in cooperation with the positioning detector (63).

6. A method for manufacturing underwear according to claim 5, characterized in that, The folding unit (7) includes folding jaws (71), a linear driving mechanism (72) and a turning mechanism (73). The folding jaws (71) are connected to the linear driving mechanism (72) through the turning mechanism (73) and rotate around the horizontal axis and move in the vertical and horizontal planes respectively under the drive of the turning mechanism (73) and the linear driving mechanism (72).

7. A method for manufacturing underwear according to claim 1, characterized in that, The reversing unit (8) includes an opening component (81) and a reversing drive plate (82). The two sides of the opening component (81) relative to a horizontal plane are set as two groups, and the reversing drive plate (82) runs through the gap between the two groups of opening components (81).

8. A method for manufacturing underwear according to claim 7, characterized in that, Both of the two groups of opening components (81) include an opening connector (811) and an opening drive mechanism (812). A pair of opening connectors (811) are connected to the front and rear sides of the waist of the finished underwear, and perform an opening and closing movement driven by the opening drive mechanism (812).

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