Pillowcase four-edge sewing equipment and manufacturing method thereof

Abstract

The invention provides a pillowcase four-edge sewing device and a manufacturing method thereof. The pillowcase four-edge sewing device comprises a cloth feeding mechanism, a short-edge sewing mechanism, a cutting mechanism and a long-edge sewing mechanism. The cloth feeding mechanism comprises a first cloth placing frame, a second cloth placing frame and a cloth overlapping module; the short edge sewing module comprises two first sewing machines and two second sewing machines; the cutting mechanism comprises a cloth pulling frame and a cutting knife, and the cloth pulling frame comprises a movable cloth pulling clamp; the long edge sewing mechanism comprises a platform, a movable cloth moving rod is arranged above the platform, and third sewing machines are arranged at the two ends of the platform. Two rolls of cloth are placed on the first cloth placing frame and the second cloth placing frame respectively and overlapped through the cloth overlapping module. The two sides of the cloth are sewn through the two first sewing machines, then the two sides of the cloth are sewn towards the middle by a certain distance through the two second sewing machines, then the cloth is moved to the platform through the cloth pulling clamp to be cut, finally the cloth is pushed by the cloth moving rod to be pressed and fixed towards the cloth pressing rods on the two sides, and the cloth is sewn through the third sewing machine to form the throw pillow case. And the whole equipment structure and the manufacturing process are relatively simple.

Description

Technical Field

[0001] The present invention relates to the technical field of fabric processing, and more particularly, to a four-side sewing device for a pillowcase and a manufacturing method thereof. Background Art

[0002] A pillowcase is used to wrap a pillow core, like a cloth bag opening, which is convenient for people to replace and wash. At present, the production of pillowcases mainly still relies on manual labor. First, two pieces of cloth with exactly the same shape and size are cut out by a machine, and then sewn in the shape of a "C" using the working mode of a traditional sewing machine. Currently, there are processing devices for pillowcases on the market. For example, the existing patent: A pillowcase production device and its manufacturing method, patent number: CN119121514A, discloses a pillowcase manufacturing device and method. However, the composition of a pillowcase is relatively simple, and its manufacturing process is also simple. The existing devices and manufacturing processes are complex and cannot produce pillowcases. Therefore, there is an urgent need for a fully automatic pillowcase production device. Summary of the Invention

[0003] In order to overcome the deficiencies of the prior art, the present invention provides a four-side sewing device for a pillowcase and a manufacturing method thereof to solve the problems mentioned in the above background art.

[0004] To solve the above technical problems, the present invention provides the following technical solution: A four-side sewing device for a pillowcase, comprising a cloth feeding mechanism, a short-side sewing mechanism, a cutting mechanism, and a long-side sewing mechanism arranged in sequence;

[0005] The cloth feeding mechanism includes a first cloth rack, a second cloth rack, and a cloth overlapping module. The cloth overlapping module includes a conveying roller and a tensioning roller. The first cloth rack and the second cloth rack are arranged on the same side of the cloth overlapping module, and the tensioning roller is arranged on one side of the conveying roller;

[0006] The short-side sewing module includes two first sewing machines and two second sewing machines, and the two first sewing machines and the two second sewing machines are slidably arranged opposite to each other;

[0007] The cutting mechanism includes a cloth pulling rack and a cutting knife. The cutting knife is arranged between the cloth pulling rack and the second sewing machine, and the cloth pulling rack includes a moving cloth pulling clip;

[0008] The long-side sewing mechanism includes a platform. A movable cloth moving rod and a pressing rod are arranged above the platform. Third sewing machines are arranged at both ends of the platform. The cloth moving rod moves in the middle and at both ends of the platform, and the pressing rod vertically presses on the platform.

[0009] Further, the long-edge sewing mechanism includes two downward moving tracks disposed above the platform. A pressing cylinder is mounted on the moving track, and a cloth moving rod is provided on the piston rod of the pressing cylinder.

[0010] Further, cloth taking mechanisms are further disposed at both ends of the platform. The cloth taking mechanisms include two cloth taking clips and a cloth stacking platform. The cloth stacking platform is movably disposed vertically below the platform, and the cloth taking clips are disposed on one side of the platform.

[0011] Further, the cutting mechanism further includes a cloth clamping rod and a camera, and the cloth clamping rod and the camera are disposed above between the short-edge sewing module and the cutting knife.

[0012] Further, the short-edge sewing module further includes a rotatable cloth storage rack. The cloth storage rack is U-shaped, and a counterweight is disposed at one end close to the opening.

[0013] Further, the short-edge sewing module further includes two position sensors, and the two position sensors respectively correspond to the two first sewing machines.

[0014] Further, edge sensors are further disposed on the first cloth placing rack and the second cloth placing rack.

[0015] A method for manufacturing a pillowcase, using the pillowcase production equipment as described in any one of claims 1 to 7, includes the following steps:

[0016] S1: Manually place two rolls of cloth on the first cloth placing rack and the second cloth placing rack respectively, and pull the free ends of the two rolls of cloth to the cloth overlapping die;

[0017] S2: Pass through the conveying rollers and the tensioning rollers, and convey the two pieces of cloth in an overlapping manner along the conveying direction to the two first sewing machines;

[0018] S3: The two first sewing machines respectively sew the two sides of the cloth along the transmission direction;

[0019] S4: After the two sides of the cloth are sewn, it is conveyed to the two second sewing machines. The two second sewing machines move relatively along a direction perpendicular to the cloth conveying direction, and sew the same size on both sides of the cloth;

[0020] S5: The cloth pulling clip clamps the cloth that has completed the horizontal sewing, passes under the cutting knife and spreads it on the platform, and the cutting knife cuts;

[0021] S6: Control the cloth moving rod to press down the cut cloth and move it to both sides of the platform. The pressing cloth rod presses down to fix the cloth on the platform, and the third sewing machine sews one side of the cloth to form a C-shaped pillowcase.

[0022] The beneficial effects of the present invention are as follows:

[0023] A four-side sewing device for a pillowcase of the present invention includes a cloth feeding mechanism, a short-side sewing mechanism, a cutting mechanism, and a long-side sewing mechanism arranged in sequence; the cloth feeding mechanism includes a first cloth rack, a second cloth rack, and a cloth overlapping module, the cloth overlapping module includes a conveying roller and a tensioning roller, the first cloth rack and the second cloth rack are arranged on the same side of the cloth overlapping module, and the tensioning roller is arranged on one side of the conveying roller; the short-side sewing module includes two first sewing machines and two second sewing machines, and the two first sewing machines and the two second sewing machines are arranged relatively and slidably; the cutting mechanism includes a cloth pulling rack and a cutting knife, the cutting knife is arranged between the cloth pulling rack and the second sewing machine, and the cloth pulling rack includes a moving cloth clamp; the long-side sewing mechanism includes a platform, a movable cloth moving rod is arranged above the platform, third sewing machines are arranged at both ends of the platform, and the cloth moving rod moves in the middle and at both ends of the platform. Two rolls of cloth are respectively placed on the first cloth rack and the second cloth rack and are overlapped through the cloth overlapping module; after being sewn on both sides by the two first sewing machines, and then sewn a certain distance from both sides of the cloth towards the middle by the two second sewing machines, then cut by the cutting knife and the cloth clamp moves and is placed on the platform, and finally the cloth moving rod pushes the cloth to be pressed down by the cloth pressing rods on both sides, and is sewn by the third sewing machine to form a pillowcase. The overall equipment structure and manufacturing process are relatively simple, realizing the automatic production of the pillowcase. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0025] Figure 1 Structural schematic diagram of a four-side sewing device for a pillowcase of the present invention;

[0026] Figure 2 Structural schematic diagram of the cloth feeding mechanism of the four-side sewing device for a pillowcase of the present invention;

[0027] Figure 3 Structural schematic diagram of the cloth overlapping module of the four-side sewing device for a pillowcase of the present invention;

[0028] Figure 4 Structural schematic diagram of the two first sewing machines of the cloth feeding mechanism of the four-side sewing device for a pillowcase of the present invention;

[0029] Figure 5 Structural schematic diagram of the cutting mechanism and the long-side sewing mechanism of the four-side sewing device for a pillowcase of the present invention;

[0030] Figure 6Another perspective structural schematic diagram of the long-edge sewing mechanism of the pillowcase four-side sewing device described in the present invention;

[0031] Figure 7 Structural schematic diagram of the cloth-taking clamp of the pillowcase four-side sewing device described in the present invention;

[0032] Figure 8 Structural schematic diagram of the cloth-pulling frame of the pillowcase four-side sewing device described in the present invention.

[0033] Description of main component symbols

[0034] 10. Upper cloth mechanism; 101. First cloth placement rack; 1011. First corner rack; 1012. First L-shaped bracket; 1013. First support roller; 102. Second cloth placement rack; 1021. Second corner rack; 1022. Second L-shaped bracket; 1023. Second support roller; 103. Cloth overlapping module; 1031. Conveyor roller; 1032. Tension roller; 104. Opposite side sensor;

[0035] 20. Short-edge sewing mechanism; 201. First sewing machine; 202. Second sewing machine; 203. Cloth storage rack; 204. Position sensor;

[0036] 30. Cutting mechanism; 301. Cloth-pulling frame; 3011. Cloth-pulling clamp; 302. Cutting knife; 303. Cloth clamping rod; 304. Camera;

[0037] 40. Long-edge sewing mechanism; 401. Platform; 402. Cloth transfer rod; 403. Cloth pressing rod; 404. Third sewing machine; 405. Cloth-taking clamp; 406. Cloth stacking platform. Detailed implementation manners

[0038] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some but not all of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0039] Example 1

[0040] Please refer to Figure 1, the present invention provides a four-side sewing device for a pillowcase and its manufacturing method, including a cloth feeding mechanism 10, a short-side sewing mechanism 20, a cutting mechanism 30, and a long-side sewing mechanism 40 arranged in sequence; the cloth feeding mechanism 10 is used to overlap two pieces of cloth and convey them to the short-side sewing mechanism 20; the short-side sewing mechanism 20 is used to sew both sides of the overlapping cloth and sew the opening position of the pillowcase; the cutting mechanism 30 is used to cut the cloth into single pieces of cloth and drop them onto the long-side sewing mechanism; the long-side sewing mechanism sews the side opposite to the opening of the cloth to form a pillowcase.

[0041] Please refer to Figures 2-3 , the cloth feeding mechanism 10 includes a first cloth rack 101, a second cloth rack 102, and a cloth overlapping module 103. The first cloth rack 101 and the second cloth rack 102 are arranged on the same side of the cloth overlapping module 103. The tension roller 1032 is arranged on one side of the conveying roller 1031; specifically, the first cloth rack 101 includes a first corner rack 1011 and a first L-shaped bracket 1012. A first support roller 1013 is arranged on the first foot rack. Rollers are arranged in sequence on the first L-shaped bracket 1012. The whole roll of cloth is sleeved on the support roller, and the free end of the cloth passes through the rollers on the first L-shaped bracket 1012 from above to the cloth overlapping module 103. The second cloth rack 102 includes a second foot rack. A second support roller 1023 is arranged on the second foot rack. Rollers are arranged in sequence on the second L-shaped bracket 1022. Another whole roll of cloth is sleeved on the second support roller 1023, and the free end of the cloth directly reaches the overlapping module, realizing the feeding of two pieces of cloth.

[0042] Please refer to Figure 3 , the cloth overlapping module 103 includes a conveying roller 1031 and a tension roller 1032. The conveying roller 1031 and the tension roller respectively include two groups, which are arranged vertically on the frame. The free end of the cloth coming from the first cloth rack 101 is conveyed by the upper conveying roller 1031, then bypasses the upper tension roller and reaches the lower conveying roller 1031. The free end of the cloth on the second cloth rack 102 directly reaches the lower conveying roller 1031. The overlapped cloth reaches the short-side sewing module from the lower tension roller. The overlapping module overlaps the two pieces of cloth while conveying them and conveys them towards the short-side sewing module. Further, the first cloth rack 101 and the second cloth rack 102 are further provided with edge sensors 104. One edge sensor 104 is installed on the L-shaped bracket and is used to monitor whether the cloth conveyed by the first cloth rack 101 deviates; the other edge sensor 104 is installed on the frame of the cloth overlapping module and is used to monitor in real time whether the cloth conveyed by the second cloth rack 102 deviates. The edge sensor 104 plays a role in monitoring the two pieces of cloth during the conveying process.

[0043] Please refer to Figures 4-6, the short-edge sewing module includes two first sewing machines 201 and two second sewing machines 202, and the two first sewing machines 201 and the two second sewing machines 202 are arranged opposite to each other slidably; specifically, the two first sewing machines 201 are installed on the frame, and the two first sewing machines 201 can move relative to each other. The overlapped fabric passes between the two first sewing machines 201, and the two first sewing machines 201 sew both sides of the moving fabric. Further, the short-edge sewing module further includes two position sensors 204. The two position sensors 204 respectively correspond to the two first sewing machines 201. The two position sensors 204 are installed on the frame. The overlapped fabric first passes through the two position sensors 204, and both sides of the fabric respectively correspond to the positions of the two position sensors 204. The relative distance between the two first sewing machines 201 is adjusted according to the positions of both edges of the fabric to ensure the precise sewing of both sides of the overlapped fabric by the two first sewing machines 201.

[0044] Further, the short-edge sewing module further includes a rotatable fabric storage rack 203. The fabric storage rack 203 is U-shaped, and a counterweight is arranged at one end close to the opening. Both sides of the fabric storage rack 203 are hinged to one side of the frame close to the two second sewing machines 202. The fabric after being sewn on both sides bypasses the fabric storage rack 203. When the fabric conveyed from the second sewing machine 202 increases, the fabric storage rack 203 presses down the fabric under the action of gravity, increasing the bending radian of the fabric, playing a role of temporarily storing the fabric and pre-tightening.

[0045] Please refer to Figures 4-6 , the two second sewing machines 202 are installed on the frame. A lead screw is installed on the frame, and the lead screw drives the two second sewing machines 202 to move closer to or away from each other. The sewn fabric moves between the two second sewing machines 202. Control the two second sewing machines 202 to move closer to each other, and sew a certain distance from both sides of the fabric towards the middle to form a middle opening, that is, complete the sewing of the opening and both sides of the pillowcase.

[0046] Please refer to Figure 2 、 Figure 8, the cutting mechanism 30 includes a cloth pulling frame 301 and a cutting knife 302. The cutting knife 302 is arranged between the cloth pulling frame 301 and the second sewing machine 202. The cloth pulling frame 301 includes a movable cloth clamping clip 3011. Specifically, the cloth pulling frame 301 is arranged on one side of the platform 401. The cloth sewn by the two second sewing machines 202 is conveyed towards the platform 401. The cutting mechanism 30 includes a cloth clamping rod 303 and a camera 304. The cloth clamping rod 303 and the camera 304 are arranged above between the short-side sewing module and the cutting knife 302. When the camera 304 captures the cloth, it controls the cloth pulling frame 301 to move towards one side of the two second sewing machines 202. The cloth clamping clip 3011 clamps one end of the cloth and pulls the cloth to be laid on the platform 401. Then it controls the cloth clamping rod 303 to clamp the cloth and controls the cutting knife 302 to perform cutting, so that the cloth sleeve with an opening falls on the platform 401, and the side to be sewn faces the side close to the cutting knife 302.

[0047] Please refer to Figures 5-6 , the long-side sewing mechanism 40 includes a platform 401. A movable cloth moving rod 402 and a cloth pressing rod 403 are arranged above the platform 401. Third sewing machines 404 are arranged at both ends of the platform 401. The cloth moving rod 402 moves in the middle and at both ends of the platform 401. Specifically, the long-side sewing mechanism 40 includes two downward moving tracks arranged above the platform 401. A downward pressing air cylinder is installed on the moving track. The piston rod of the downward pressing air cylinder is provided with the cloth moving rod 402. It controls the cloth moving rod 402 to press down on the cloth cut and placed on the platform 401. The cloth moving rod 402 moves the cloth to one end of the platform 401. Then the cloth pressing rod 403 presses down the cloth on the platform 401. Finally, it controls the third sewing machine 404 to sew one edge of the cloth to form a pillowcase.

[0048] Please refer to Figures 5-7 , cloth taking mechanisms are further arranged at both ends of the platform 401. The cloth taking mechanisms include two cloth taking clips 405 and a cloth stacking platform 406. The cloth stacking platform 406 is arranged below the platform 401 and can move in the vertical direction. The cloth taking clips 405 are arranged on one side of the platform 401. Specifically, the sewn pillowcase is on the platform 401. It controls the two cloth taking clips 405 to approach the platform 401 to clamp the pillowcase, and moves the cloth taking clips 405 to make the pillowcase fall on the cloth stacking platform 406. The cloth stacking platform 406 can move downward in the vertical direction, and the pillowcase is on the cloth stacking platform 406.

[0049] Embodiment 2

[0050] A method for manufacturing a pillowcase, using the above-mentioned pillowcase production equipment, includes the following steps:

[0051] S1: Manually place two rolls of cloth on the first cloth placing frame 101 and the second cloth placing frame 102 respectively, and pull the free ends of the two rolls of cloth to the cloth overlapping module 103. The first cloth placing frame 101 and the second cloth placing frame 102 realize the feeding of the cloth.

[0052] S2: Through the conveying rollers 1031 and the tensioning rollers 1032, the two pieces of fabric are overlapped and conveyed along the conveying direction to the two first sewing machines 201. The two sets of conveying rollers 1031 and the tensioning rollers 1032 overlap the two pieces of fabric and convey them towards the two first sewing machines 201;

[0053] S3: The two first sewing machines 201 respectively sew the two sides of the fabric along the transmission direction to complete the sewing of the two sides;

[0054] S4: After the two sides of the fabric are sewn, it is conveyed to the two second sewing machines 202. The two second sewing machines 202 move relatively along the direction perpendicular to the fabric conveying direction, sew the same size on both sides of the fabric, and form a C-shaped opening after sewing by the two second sewing machines 202;

[0055] S5: The cloth clamping clip 3011 clamps the fabric that has completed the horizontal sewing, passes under the cutting knife 302 and spreads it on the platform 401. The cutting knife 302 cuts, and a single piece of fabric falls on the platform 401;

[0056] S6: Control the cloth moving rod 402 to press down the cut fabric and move it to both sides of the platform 401. The third sewing machine 404 sews one side of the fabric to form a C-shaped pillowcase.

[0057] In the present invention, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but are in contact through other features between them. Moreover, the first feature being "above", "over" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under" and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0058] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A pillowcase four-side sewing device, characterized in that: It includes a cloth feeding mechanism, a short side sewing mechanism, a cutting mechanism and a long side sewing mechanism which are arranged in sequence; The cloth loading mechanism comprises a first cloth placing rack, a second cloth placing rack and a cloth overlapping module, the cloth overlapping module comprises a conveying roller and a tensioning roller, the first cloth placing rack and the second cloth placing rack are arranged on the same side of the cloth overlapping module, and the tensioning roller is arranged on one side of the conveying roller; The short side sewing module comprises two first sewing machines and two second sewing machines, and the two first sewing machines and the two second sewing machines are slidably arranged relative to each other; The cutting mechanism comprises a cloth pulling frame and a cutting knife, wherein the cutting knife is arranged between the cloth pulling frame and the second sewing machine, and the cloth pulling frame comprises a movable cloth pulling clamp; The long side sewing mechanism comprises a platform, a movable cloth moving rod and a cloth pressing rod are arranged above the platform, a third sewing machine is arranged at both ends of the platform, the cloth moving rod moves in the middle and at both ends of the platform, and the cloth pressing rod is vertically pressed down on the platform.

2. The pillowcase four-side sewing device according to claim 1, characterized in that: The long side sewing mechanism comprises two downward moving rails arranged above the platform, a downward pressing cylinder is installed on the moving rails, and the cloth moving rod is arranged on the piston rod of the downward pressing cylinder.

3. The pillowcase four-side sewing device according to claim 1, characterized in that: Cloth taking mechanisms are further arranged at both ends of the platform, and the cloth taking mechanisms include two cloth taking clamps and a cloth stacking platform. The cloth stacking platform is arranged below the platform and can move in a vertical direction, and the cloth taking clamps are arranged on one side of the platform.

4. The pillowcase four-side sewing device according to claim 1, characterized in that: The cutting mechanism further comprises a cloth clamping rod and a camera, wherein the cloth clamping rod and the camera are arranged above the short side sewing module and the cutting knife.

5. The pillowcase four-side sewing device according to claim 1, characterized in that: The short side sewing module further comprises a rotatable cloth storage rack, which is U-shaped and has a counterweight block arranged at one end close to the opening.

6. The pillowcase four-side sewing device according to claim 1, characterized in that: The short side sewing module further comprises two position sensors, and the two position sensors correspond to the two first sewing machines respectively.

7. The pillowcase four-side sewing device according to claim 1, characterized in that: The first cloth placing rack and the second cloth placing rack are further provided with edge sensors.

8. A method for making a pillow cover, using the pillow cover production equipment as claimed in any one of claims 1 to 7, comprising the following steps: S1: manually placing two rolls of cloth on the first cloth rack and the second cloth rack respectively, and pulling the free ends of the two rolls of cloth to the cloth overlapping mold; S2: passing through the conveying roller and the tensioning roller, the two fabrics are conveyed to the two first sewing machines in an overlapping manner along a conveying direction; S3: the two first sewing machines sew the fabric on both sides along the transmission direction respectively; S4: After sewing both sides of the fabric, the fabric is transferred to the two second sewing machines, and the two second sewing machines move relative to each other in a direction perpendicular to the fabric conveying direction to sew the same size on both sides of the fabric; S5: The cloth pulling clamp clamps the cloth that has been sewn horizontally and passes it under the cutting knife and lays it flat on the platform, and the cutting knife performs cutting; S6: Control the cloth moving rod to press down the cut cloth and move it to both sides of the platform, the cloth pressing rod presses down and fixes the cloth on the platform, and the third sewing machine sews the cloth to form a C-shaped pillowcase.

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