CN114523671A

CN114523671A - Elastic sewing machine and ultrasonic cutting mechanism thereof

Info

Publication number: CN114523671A
Application number: CN202210250490.5A
Authority: CN
Inventors: 蔡金盛; 曹亚丰; 黄学敏
Original assignee: Langjin Technology Zhejiang Co ltd
Current assignee: Langjin Technology Zhejiang Co ltd
Priority date: 2022-03-15
Filing date: 2022-03-15
Publication date: 2022-05-24

Abstract

The invention provides an elastic sewing machine and an ultrasonic cutting mechanism thereof, wherein the ultrasonic cutting mechanism comprises a frame, a movable knife, a fixed knife, a first driving part and an ultrasonic generator; the movable knife is arranged on the first driving part and driven by the first driving part to move up and down; the fixed knife is fixed on the frame and is positioned right below the movable knife; the ultrasonic generator is fixed on the fixed cutter, and pre-welding can be completed while cutting materials, so that dislocation of subsequent materials during sewing is avoided.

Description

Elastic sewing machine and ultrasonic cutting mechanism thereof

Technical Field

The invention relates to a rubber band connecting device, in particular to a rubber band machine and an ultrasonic cutting mechanism thereof.

Background

The existing material cutting mechanism applied to the elastic band machine mainly comprises a movable knife, a fixed knife and a driving cylinder, wherein the movable knife is positioned above the fixed knife, the driving cylinder drives the movable knife to be pressed down to the fixed knife, and the movable knife is matched with the fixed knife, so that a cutting effect is generated on an elastic band. And clamping the end part position of the elastic band by using other station manipulators, splicing the end part position and the end part position into a ring, and transmitting the ring to a sewing machine for sewing.

Although the material cutting mechanism can complete the cutting action of the basic elastic band, after the elastic band is cut off, the elastic band needs to be clamped and spliced into a ring again by using other station manipulators, in the process, the end part of the elastic band is easy to be dislocated, and the quality of the spliced elastic band is poor.

Disclosure of Invention

In view of the above, a first object of the present invention is to provide an ultrasonic material cutting mechanism, which can perform pre-welding while cutting material, so as to avoid the dislocation of subsequent materials during seaming.

In order to achieve the purpose, the technical scheme of the invention is as follows:

an ultrasonic material cutting mechanism comprises a frame, a movable cutter, a fixed cutter, a first driving part and an ultrasonic generator; the first driving part is fixed on the frame, and the movable knife is arranged on the first driving part and driven by the first driving part to move up and down; the fixed knife is positioned right below the movable knife; the ultrasonic generator is fixed on the frame, and the output end of the ultrasonic generator is connected with the fixed knife.

Preferably, the frame is further provided with a limiting assembly, and the limiting assembly is used for limiting the material to be cut.

Preferably, the limiting assembly comprises a fixed block, a movable block and a second driving part; the fixed block and the movable block are both positioned on the front side of the fixed knife, and the fixed block is mounted on the rack. The second driving part is installed on the rack, the movable block is connected with the second driving part through a connecting rod, and the second driving part drives the movable block to be far away from or close to the fixed block.

Preferably, the length of the connecting rod is adjustable.

Preferably, the tops of the fixed block and the movable block protrude out of the fixed knife, and the protruding portions extend towards one side of the fixed knife to form extending portions.

The second purpose of the invention is to provide an elastic band machine, which can pre-weld two ends of an elastic band when the elastic band is subjected to cutting treatment, so that no obvious seam appears on the finished elastic band.

an elastic sewing machine comprising at least:

the feeding mechanism is used for conveying the elastic band to the cutting mechanism;

the ultrasonic cutting mechanism is used for cutting and welding the elastic band;

the material folding mechanism is used for folding the front end of the elastic band to the material cutting mechanism and conveying the elastic band subjected to cutting and welding treatment to the material sewing mechanism;

and the material sewing mechanism is used for sewing the elastic band.

Preferably, the material folding mechanism comprises a first Y-axis driving component, a second Y-axis driving component, a first X-axis driving component, a second X-axis driving component, a first material clamping component, a second material clamping component and a rotary driving component; the first Y-axis driving assembly is mounted on the machine table, the first X-axis driving assembly is mounted on the Y-axis driving assembly, the rotating assembly is mounted on the second X-axis driving assembly, the first clamping assembly is connected with the rotating driving assembly and driven by the rotating driving assembly to rotate, the second X-axis driving assembly and the second Y-axis driving assembly are mounted on the first X-axis driving assembly, and the second clamping assembly is mounted on the second Y-axis driving assembly.

Preferably, the first clamping assembly comprises a first movable plate, a first fixed plate and a third driving part, the first fixed plate is fixedly connected with the rotary driving assembly, the third driving part is mounted on the first fixed plate, and the first movable plate and the first fixed plate are arranged in parallel and fixedly connected with the third driving part; the third driving part drives the first movable plate to move away from or close to the first fixed plate.

Preferably, the second clamping assembly comprises a second movable plate, a second fixed plate and a fourth driving part, the second fixed plate is fixedly connected with the second Y-axis driving assembly, the fourth driving part is mounted on the second fixed plate, and the second movable plate and the second fixed plate are arranged in parallel and fixedly connected with the fourth driving part; the fourth driving part drives the second movable plate to move away from or close to the second fixed plate.

Preferably, the rotary driving assembly comprises a base, a motor, an origin sensor, a rotating shaft and a shaft sleeve; the base is arranged on the second Y-axis driving assembly, and the motor and the shaft sleeve are arranged on the base; the rotating shaft is rotatably sleeved in the shaft sleeve, one end of the rotating shaft is fixedly connected with the first clamping assembly, and the other end of the rotating shaft is connected with an output shaft of the motor through a synchronous belt transmission structure; the origin inductor is installed on the base and close to the rotating shaft and used for detecting the rotating angle of the rotating shaft.

The technical effects of the invention are mainly reflected in the following aspects:

1. the elastic band is pressed on the fixed cutter at the moment of cutting, meanwhile, the ultrasonic generator drives the fixed cutter to generate high-frequency vibration, and the vibration is transmitted to the elastic band to enable the end part of the elastic band to generate high temperature and be fused together;

2. the material folding mechanism is used for automatically folding the end of the elastic band to the material cutting mechanism, manual operation is not needed, and the efficiency is high.

Drawings

FIG. 1 is a view showing the structure of an ultrasonic blanking mechanism in an embodiment;

FIG. 2 is a schematic view of the connection between the stationary blade and the ultrasonic generator in the embodiment;

FIG. 3 is an exploded view of the stop assembly of the embodiment;

FIG. 4 is the overall structure of the elastic sewing machine in the embodiment;

FIG. 5 is a structural view of a material folding mechanism in the embodiment;

FIG. 6 is a schematic diagram of the first clamping assembly and the rotary driving assembly in the embodiment;

FIG. 7 is a schematic diagram of a second clamping assembly and a second Y-axis driving assembly according to an embodiment.

Reference numerals: 1. a machine platform; 2. a feeding mechanism; 3. an ultrasonic material cutting mechanism; 31. a frame; 32. a first drive member; 33. moving a knife; 34. fixing a cutter; 341. a plane; 35. an ultrasonic generator; 4. a material sewing mechanism; 5. a material folding mechanism; 51. a first Y-axis drive assembly; 52. a first X-axis drive assembly; 53. a second X-axis drive assembly; 54. a second Y-axis drive assembly; 55. a rotary drive assembly; 551. a base; 552. a motor; 553. a shaft sleeve; 554. a rotating shaft; 555. an origin sensor; 56. a first clamping assembly; 561. a first movable plate; 562. a first fixing plate; 563. a third cylinder; 57. a second clamping assembly; 571. a second movable plate; 572. a second fixing plate; 573. a fourth cylinder; 61. a fixed block; 62. a movable block; 621. an extension portion; 63. a connecting rod; 64. a second cylinder; 65. a first connection block; 66. an adjusting plate; 661. adjusting the mounting groove; 67. mounting a plate; 68. a second connecting block; 69. adjusting the bolt; 71. a pipe frame; 72. an air tube; 8. a conveying roller; 9. a conveying plane.

Detailed Description

The following detailed description of the embodiments of the present invention is provided in order to make the technical solution of the present invention easier to understand and understand.

The first embodiment,

Referring to fig. 1 and 2, the present embodiment provides an ultrasonic blanking mechanism 3, which includes a frame 31, a movable blade 33, a fixed blade 34, a first driving member 32, and an ultrasonic generator 35. Wherein the first driving part 32 is fixed on the frame 31, includes a first cylinder, and is installed vertically downward. The movable knife 33 comprises a knife body and a knife rest, the knife rest is detachably mounted at the lower end of the first driving part 32, the knife body is detachably or integrally arranged at the lower end of the knife rest, and the movable knife 33 can be driven to move up and down by controlling the first driving part 32. The number of the first cylinders may be two, so that the movable blade 33 is more balanced in left and right when it is cut down.

The fixed knife 34 is located right below the movable knife 33, and the top end of the fixed knife 34 forms a plane 341, so that when the movable knife 33 is pressed down, the material can be pressed on the plane 341 and cut off. The ultrasonic generator 35 is fixed on the frame 31, and the output end is connected with the fixed knife 34, the output end of the ultrasonic generator 35 can also be called as a vibrator head, and when the ultrasonic generator 35 works, the fixed knife 34 can be driven by the vibrator head to vibrate in high frequency; therefore, when the stationary blade 34 presses down the cut material, the end portion of the material is also subjected to high frequency vibration, thereby generating high temperature and melting together.

In order to prevent the materials from deviating, a limiting assembly is further arranged, and referring to fig. 1 and 3, the limiting assembly comprises a fixed block 61, a movable block 62 and a second driving part; the fixed block 61 and the movable block 62 are both positioned on the front side of the fixed knife 34, and the fixed block 61 is detachably mounted on the frame 31. In addition, the top of the fixed block 61 and the movable block 62 protrudes out of the fixed knife 34, and the protruding portion extends towards one side of the fixed knife 34 to form an extending portion 621.

The second driving part is mounted on the frame 31, and the movable block 62 is fixed with the second driving part by a connecting rod 63, and the second driving part comprises a second air cylinder 64. Connecting rod 63's adjustable length, it includes the master rod body, regulating plate 66, first connecting block 65 and bolt, the one end and the movable block 62 body coupling of the master rod body, the other end can be dismantled with first connecting block 65 and be connected, regulation mounting groove 661 has been seted up along horizontal (being the length direction of the master rod body) on the regulating plate 66, second connecting block 68 passes through adjusting bolt 69 and installs on regulation mounting groove 661, the accessible loosens adjusting bolt 69 and adjusts the relative position of second connecting block 68 on regulating plate 66, realize connecting rod 63's whole length adjustment, finally realize adjusting the minimum interval between movable block 62 and the fixed block 61, in order to adapt to not unidimensional material. The second cylinder 64 is fixed on the frame 31 through a mounting plate 67, a second connecting block 68 is mounted at the front end of the second cylinder 64, and the adjusting plate 66 is mounted on one side of the second connecting block 68.

Before the material cutting action is executed, the second air cylinder 64 is controlled to drive the movable block 62 to be close to the fixed block 61, so that one side, opposite to the fixed block 61 and the movable block 62, of the fixed block 61 is in contact with the material, the material is prevented from moving left and right, and after the material cutting is finished, the movable block 62 is driven to be far away from the fixed block 61.

In addition, a pipe frame 71 is arranged on the frame 31, and an air pipe 72 is arranged on the pipe frame 71; the upper end of the air pipe 72 is communicated with an air source, and the lower end faces the fixed knife 34. The air pipe 72 blows air to the materials between the fixed knife 34 and the movable knife 33, so that the materials are prevented from being excessively arched upwards in the moving process.

Example II,

Referring to fig. 4, on the basis of the first embodiment, the present embodiment provides an elastic sewing machine, which at least includes:

the feeding mechanism 2 is used for conveying the elastic band to the cutting mechanism;

the ultrasonic cutting mechanism 3 in the first embodiment is used for cutting and welding the elastic band; in order to convey the elastic band conveniently, referring to fig. 1, a conveying roller 8 is further mounted on the frame 31, the conveying roller 8 is driven by a motor 552 and is located on the rear side of the fixed knife 34 and the movable knife 33, a gap for the elastic band to pass through is formed between the conveying roller 8 and a conveying plane 9341 on the frame 31, when the elastic band passes through, the conveying roller 8 is pressed on the elastic band, and the conveying roller 8 rotates to be matched with a feeding mechanism 2 behind to convey the elastic band to a subsequent station. Generally, the frame 31 is also provided with a gauge for calculating the conveying length of the elastic band.

The material folding mechanism 5 is used for folding the front end of the elastic band to the material cutting mechanism and conveying the elastic band subjected to cutting and welding treatment to the material sewing mechanism 4;

and a material sewing mechanism 4 for sewing the elastic band.

Each mechanism is installed on the machine table 1. Since the feed mechanism 2 and the sewing mechanism 4 are conventional in the art, the present embodiment will not be described in detail. Next, the present embodiment will describe the material folding mechanism 5 and its cooperation with the ultrasonic material cutting mechanism 3 in detail.

Referring to fig. 5, the material folding mechanism 5 includes a first Y-axis driving assembly 51, a second Y-axis driving assembly 54, a first X-axis driving assembly 52, a second X-axis driving assembly 53, a first material clamping assembly 56, a second material clamping assembly 57, and a rotary driving assembly 55. Wherein, first Y axle drive assembly 51 is installed on board 1, and first Y axle drive assembly 51 can adopt dustless screw rod slip table, through controlling first Y axle drive assembly 51, can indirectly drive first material clamping component 56, second material clamping component 57 and move towards sewing material mechanism 4, presss from both sides the rubber band and send to sewing material mechanism 4 department and sew up.

The first X-axis drive assembly 52 employs a pneumatic slide. The second X-axis driving assembly 53 and the second Y-axis driving assembly 54 are mounted on the first X-axis driving assembly 52, the second clamping assembly 57 is integrally mounted on the second Y-axis driving assembly 54, the rotating assembly is mounted on the second X-axis driving assembly 53, and the first clamping assembly 56 is connected to the rotating driving assembly 55 and is driven by the rotating driving assembly 55 to rotate. The first clamping assembly 56 and the second clamping assembly 57 can be driven to simultaneously approach or separate from the ultrasonic material cutting mechanism 3 by controlling the first X-axis driving assembly 52.

The second X-axis driving assembly 53 may employ a dust-free screw slide, and the first clamping assembly 56 may be driven to be individually close to or far from the ultrasonic blanking mechanism 3 by controlling the second X-axis driving assembly 53. The second Y-axis driving assembly 54 may employ a pneumatic slide, and the second clamping assembly 57 may be driven to individually approach or separate from the elastic belt by controlling the second Y-axis driving assembly 54.

Referring to fig. 6, the first clamping assembly 56 includes a first movable plate 561, a first fixed plate 562 and a third cylinder 563, the first fixed plate 562 is fixedly connected to the rotation driving assembly 55, the third cylinder 563 is mounted on the first fixed plate 562, and the first movable plate 561 is parallel to the first fixed plate 562 and is fixedly connected to the third driving member; the third cylinder 563 drives the first movable plate 561 to be far away from or close to the first fixed plate 562, thereby realizing the clamping and releasing of the elastic band.

The rotary driving assembly 55 comprises a base 551, a motor 552, an origin sensor 555, a rotating shaft 554 and a shaft sleeve 553; base 551 is mounted on second Y-axis drive assembly 54, and motor 552 and bushing 553 are mounted on base 551; the rotating shaft 554 is rotatably sleeved in the shaft sleeve 553, one end of the rotating shaft 554 is fixedly connected with the first material clamping assembly 56, and the other end is connected with an output shaft of the motor 552 through a synchronous belt transmission structure; the origin sensor 555 is installed on the base 551 and close to the rotation shaft 554, and is used for detecting the variation of the rotation angle of the rotation shaft 554 and controlling the actual rotation angle and the reset of the rotation shaft 554 according to the variation.

Referring to fig. 7, the second clamping assembly 57 includes a second movable plate 571, a second fixed plate 572 and a fourth cylinder 573, the second fixed plate 572 is fixedly connected to the second Y-axis driving assembly 54, the fourth cylinder 573 is mounted on the second fixed plate 572, and the second movable plate 571 is arranged in parallel with the second fixed plate 572 and is fixedly connected to the fourth cylinder 573; the fourth cylinder 573 drives the second movable plate 571 to move away from or close to the second fixed plate 572, thereby realizing the clamping and releasing of the elastic band.

The working principle of the embodiment is as follows:

the elastic band is conveyed forward for a certain distance, so that the front end part of the elastic band is just positioned between the first movable plate 561 and the first fixed plate 562 after the elastic band passes through the space between the fixed knife 34 and the movable knife 33, and at the moment, the third air cylinder 563 is controlled to drive the first movable plate 561 to move upwards to clamp the front end part of the elastic band. Then the second X-axis driving component 53 is controlled to drive the first material clamping component 56 to move reversely for a short distance, meanwhile, the elastic band is conveyed for a certain length continuously, and as the front end part of the elastic band is clamped by the first material clamping component 56, the continuously conveyed elastic band can naturally droop; then the second X-axis driving assembly 53 is controlled to drive the first clamping assembly 56 to move to the limit position towards the material cutting mechanism, and then the rotary driving assembly 55 is controlled to drive the first clamping assembly 56 to rotate 180 degrees towards the material cutting mechanism, so that the front end part of the elastic band is overturned between the fixed knife 34 and the movable knife 33. And then controls the second driving part to drive the movable block 62 to move to the limit position toward the fixed block 61 to attach the both sides of the elastic band. Then the first driving part 32 is controlled to drive the movable knife 33 to move downwards, the ultrasonic generator 35 is controlled to work at the same time, after the movable knife 33 moves downwards to the extreme position, the front end part and the middle part of the elastic band are simultaneously pressed on the fixed knife 34 and cut off, and at the moment of cutting off, the elastic band is positioned between the cuts of the front part of the fixed knife 34 and fused together.

And then, the second X-axis driving assembly 53 is controlled to move reversely for a certain distance to pull out the welded elastic band, after the elastic band is pulled out, the second Y-axis driving assembly 54 is controlled to drive the second material clamping assembly 57 to extend out, so that the elastic band just passes through the space between the second movable plate 571 and the second fixed plate 572, at this time, the fourth cylinder 573 is controlled to drive the second movable plate 571 to move upwards to clamp the elastic band, and at this time, the elastic band is clamped by the first material clamping assembly 56 and the second material clamping assembly 57 at the same time.

The first X-axis driving assembly 52 is then controlled to drive the first clamping assembly 56 and the second clamping assembly 57 to move away from the material cutting mechanism until the elastic band is aligned with the material sewing mechanism 4. Then the first Y-axis driving assembly 51 is controlled to drive the first clamping assembly 56 and the second clamping assembly 57 to move the elastic band to the sewing position toward the sewing mechanism 4, and then the third air cylinder 563 and the fourth air cylinder 573 are simultaneously controlled to respectively drive the first movable plate 561 and the second movable plate 571 to move downwards so as to release the elastic band. And then controlling each component to reset to the initial state and waiting for the next material cutting.

The above are only typical examples of the present invention, and besides, the present invention may have other embodiments, and all the technical solutions formed by equivalent substitutions or equivalent changes are within the scope of the present invention as claimed.

Claims

1. An ultrasonic material cutting mechanism (3) is characterized by comprising a rack (31), a movable knife (33), a fixed knife (34), a first driving part (32) and an ultrasonic generator (35); the first driving part (32) is fixed on the frame (31), and the movable knife (33) is mounted on the first driving part (32) and driven by the first driving part (32) to move up and down; the fixed knife (34) is positioned right below the movable knife (33); the ultrasonic generator (35) is fixed on the frame (31), and the output end of the ultrasonic generator is connected with the fixed knife (34).

2. An ultrasonic cutting mechanism (3) according to claim 1, characterized in that a limiting component is arranged on the frame (31) and used for limiting the material to be cut.

3. An ultrasonic blanking mechanism (3) according to claim 2, wherein said limiting member comprises a fixed block (61), a movable block (62) and a second driving member; the fixed block (61) and the movable block (62) are both positioned on the side surface of the fixed knife (34), and the fixed block (61) is mounted on the rack (31); the second driving part is installed on the rack (31), the movable block (62) is connected with the second driving part through a connecting rod (63), and the second driving part drives the movable block (62) to be far away from or close to the fixed block (61).

4. An ultrasonic blanking mechanism (3) according to claim 3, characterized in that the length of the connecting rod (63) is adjustable.

5. An ultrasonic blanking unit (3) according to claim 3, wherein the top of the fixed block (61) and the movable block (62) protrudes from the fixed blade (34), and the protruding portion extends to one side of the fixed blade (34) to form an extension (621).

6. An elastic sewing machine, characterized by, include at least:

the feeding mechanism (2) is used for conveying the elastic band to the cutting mechanism;

an ultrasonic blanking mechanism (3) according to any of claims 1-5 for blanking and welding rubber band;

the material folding mechanism (5) is used for folding the front end of the elastic band to the material cutting mechanism and conveying the elastic band subjected to cutting and welding treatment to the material sewing mechanism (4);

and a material sewing mechanism (4) for sewing the elastic band.

7. An elastic sewing machine according to claim 6, characterized in that the folding mechanism (5) comprises a first Y-axis driving component (51), a second Y-axis driving component (54), a first X-axis driving component (52), a second X-axis driving component (53), a first clamping component (56), a second clamping component (57) and a rotary driving component (55); the first Y-axis driving assembly (51) is installed on the machine table (1), the first X-axis driving assembly (52) is installed on the Y-axis driving assembly, the rotating assembly is installed on the second X-axis driving assembly (53), the first clamping assembly (56) is connected with the rotating driving assembly (55) and driven by the rotating driving assembly (55) to rotate, the second X-axis driving assembly (53) and the second Y-axis driving assembly (54) are installed on the first X-axis driving assembly (52), and the second clamping assembly (57) is installed on the second Y-axis driving assembly (54).

8. An elastic sewing machine according to claim 7, characterized in that the first material clamping assembly (56) comprises a first movable plate (561), a first fixed plate (562) and a third driving member, the first fixed plate (562) is fixedly connected with the rotary driving assembly (55), the third driving member is mounted on the first fixed plate (562), the first movable plate (561) is arranged in parallel with the first fixed plate (562) and is fixedly connected with the third driving member; the third driving part drives the first movable plate (561) to move away from or close to the first fixed plate (562).

9. An elastic sewing machine according to claim 7, wherein the second clamping assembly (57) comprises a second movable plate (571), a second fixed plate (572) and a fourth driving component, the second fixed plate (572) is fixedly connected with the second Y-axis driving assembly (54), the fourth driving component is mounted on the second fixed plate (572), and the second movable plate (571) and the second fixed plate (572) are arranged in parallel and fixedly connected with the fourth driving component; the fourth driving part drives the second movable plate (571) to move away from or close to the second fixed plate (572).

10. An elastic sewing machine according to claim 7, characterised in that said rotary driving assembly (55) comprises a base (551), a motor (552), an origin sensor (555), a rotation shaft (554) and a bushing (553); the base (551) is arranged on the second Y-axis driving assembly (54), and the motor (552) and the shaft sleeve (553) are arranged on the base (551); the rotating shaft (554) is rotatably sleeved in the shaft sleeve (553), one end of the rotating shaft (554) is fixedly connected with the first clamping component (56), and the other end of the rotating shaft is connected with an output shaft of the motor (552) through a synchronous belt transmission structure; the origin sensor (555) is arranged on the base (551) and close to the rotating shaft (554) and used for detecting the rotating angle of the rotating shaft (554).