Transverse sealing mechanism for plastic bag processing

Abstract

The utility model relates to the field of plastic bag processing, in particular to a transverse sealing mechanism for plastic bag processing. Comprising a conveying assembly, a correcting assembly used for correcting the position of a plastic bag is arranged on the front side of the conveying assembly, a transverse sealing assembly used for conducting hot-pressing sealing on the plastic bag is arranged between the conveying assembly, the transverse sealing assembly comprises a mounting frame, and two stand column frames are arranged on the mounting frame and located on the front side and the rear side of the mounting frame; the upper and lower sides of the stand column frame are slidably connected with an upper hot-sealing strip and a lower hot-sealing strip respectively. According to the plastic bag hot sealing device, the connecting rod is arranged between the two hot sealing strips needing to be aligned with each other, it can be guaranteed that the hot sealing strips are always kept parallel and can be attached at the same time when matched with each other, and therefore hot sealing of a plastic bag is uniform, and the situation that an opening exists in one side after transverse sealing is avoided; pre-sealing is completed before transverse sealing of the plastic bag, and stability is achieved.

Description

Technical Field

[0001] The utility model relates to the field of plastic bag processing, in particular to a transverse sealing mechanism for plastic bag processing. Background Technique

[0002] As a kind of lightweight and large-capacity packaging material, plastic bags are widely used in daily life. In the production process of plastic bags, the transverse sealing mechanism is a key link, which affects the quality and sealing effect of plastic bags.

[0003] During the transverse sealing of plastic bags, the transverse sealing strip may not be completely aligned with the plastic bag, and there may be an included angle with the plastic bag, which may cause the plastic bag not to be evenly transversely sealed, resulting in an open mouth after the plastic bag is transversely sealed. Moreover, some devices use the characteristic of electrostatic attraction to complete the pre-sealing link before the plastic bag is transversely sealed, but the pre-sealing effect is unstable. Content of the Utility Model

[0004] The purpose of the utility model is to provide a transverse sealing mechanism for plastic bag processing to solve the above problems.

[0005] The utility model realizes the above purpose through the following technical solutions:

[0006] A transverse sealing mechanism for plastic bag processing includes a conveying component. A correction component for correcting the position of the plastic bag is arranged on the front side of the conveying component, and a transverse sealing component for hot pressing and sealing the plastic bag is arranged between the conveying components;

[0007] The transverse sealing component includes a mounting frame. Two column frames are arranged on the mounting frame, and the two column frames are located on the front and rear sides of the mounting frame. The upper and lower sides of the column frames are respectively slidably connected with an upper sealing strip and a lower sealing strip. The upper sealing strip is located above the lower sealing strip. Sliding grooves are formed on the column frames to facilitate the up and down sliding of the upper sealing strip and the lower sealing strip. A positive and negative lead screw is arranged at the front end of the upper sealing strip and the lower sealing strip. The positive and negative lead screw is rotatably connected in the sliding groove of the front column frame. The input end of the positive and negative lead screw is fixedly provided with a stepping motor. An alignment link A and an alignment link B are respectively rotatably connected to both sides of the column frame. The short rod of the alignment link A and the long rod of the alignment link B are close to the front column frame, and the long rod of the alignment link A and the short rod of the alignment link B are close to the rear column frame. The lower ends of the short rods of the alignment link A and the alignment link B are both movably connected with the upper sealing strip, and the lower ends of the long rods of the alignment link A and the alignment link B are both movably connected with the lower sealing strip. A pre-pressing port component is installed at the upper end of the mounting frame.

[0008] Preferably, the pre-pressing port component includes a pressing port cylinder. The pressing port cylinders are symmetrically installed at the upper end of the mounting frame, and a pressing rod is installed at the telescopic end of the pressing port cylinder.

[0009] Preferably, the conveying assembly includes a first conveyor belt. Plates are installed on both the front and rear sides of the first conveyor belt. Support rollers A are provided at both ends of the first conveyor belt. A motor is fixedly arranged at the input end of the support roller A. A second conveyor belt is provided on one side of the first conveyor belt. Support rollers B are provided at both ends of the second conveyor belt. A transmission assembly for driving the support roller B to rotate is provided at the end where the first conveyor belt and the second conveyor belt are close to each other.

[0010] Preferably, the correction assembly includes a correction plate. Two correction plates are symmetrically arranged above the first conveyor belt, and the bottom surfaces of the two correction plates do not contact the first conveyor belt. A sliding rail is provided at the upper end of the correction plate. A notch for facilitating its sliding on the sliding rail is provided at the upper end of the correction plate. A pin for fixing the position of the correction plate is provided in the chute near the motor. Both ends of the sliding rail are fixedly connected with mounting plates, and the lower ends of the mounting plates are fixedly connected with the plates.

[0011] Preferably, the two threads of the right and left hand lead screw have different helix directions from the middle to both ends.

[0012] Preferably, the transmission assembly includes a large pulley, which is fixedly connected with the support roller A. A small pulley is on one side of the large pulley, and the small pulley is fixedly connected with the support roller B.

[0013] The beneficial effects compared with the prior art are as follows: A connecting rod is arranged between the two heat-sealing strips that need to be aligned with each other in this device, which can ensure that the heat-sealing strips always remain parallel when cooperating with each other and can be attached simultaneously, so that the heat sealing of the plastic bag is uniform, avoiding the situation that there is an opening on one side after transverse sealing. This device uses a hydraulic push rod to pre-press the plastic bag, completes the pre-sealing before the transverse sealing of the plastic bag, and has stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0015] Figure 1 It is a schematic structural diagram of a transverse sealing mechanism for plastic bag processing according to the present invention;

[0016] Figure 2 It is a schematic structural diagram of the transverse sealing mechanism and the pre-pressing mechanism of a transverse sealing mechanism for plastic bag processing according to the present invention;

[0017] Figure 3 It is a schematic structural diagram of the transverse sealing mechanism of a transverse sealing mechanism for plastic bag processing according to the present invention;

[0018] Figure 4 It is a partial part drawing of the pre-pressing port mechanism of a horizontal sealing mechanism for plastic bag processing described in the present utility model;

[0019] Figure 5 It is a schematic structural diagram of the calibration mechanism of a horizontal sealing mechanism for plastic bag processing described in the present utility model;

[0020] Figure 6 It is a part drawing of the positive and negative lead screw A and the positive and negative lead screw B of a horizontal sealing mechanism for plastic bag processing described in the present utility model.

[0021] The description of the reference numerals is as follows:

[0022] 1. Horizontal sealing assembly; 101. Stepper motor; 102. Positive and negative lead screw; 103. Upper heat-sealing strip; 104. Lower heat-sealing strip; 105. Alignment connecting rod A; 106. Alignment connecting rod B; 107. Mounting frame; 2. Pre-pressing port assembly; 201. Pressing port cylinder; 202. Pressing rod; 3. Calibration assembly; 301. Mounting flat plate; 302. Sliding rail; 303. Calibration plate; 304. Pin; 4. Conveying assembly; 401. Motor; 402. First conveyor belt; 403. Second conveyor belt; 404. Large belt pulley; 405. Small belt pulley; 406. Support roller A; 407. Support roller B; 408. Web; 5. Plastic bag. Specific embodiments

[0023] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0024] The present utility model will be further described below with reference to the accompanying drawings:

[0025] As Figures 1-6 shown, a horizontal sealing mechanism for plastic bag processing includes a conveying assembly 4. A calibration assembly 3 for calibrating the position of the plastic bag 5 is provided on the front side of the conveying assembly 4. A horizontal sealing assembly 1 for heat-pressing and sealing the plastic bag 5 is provided between the conveying assemblies 4;

[0026] In this embodiment: The horizontal sealing assembly 1 includes a mounting frame 107. There are two column frames on the mounting frame 107, and the two column frames are located on the front and rear sides of the mounting frame 107. The upper and lower sides of the column frames are respectively slidably connected with an upper heat-sealing strip 103 and a lower heat-sealing strip 104. The upper heat-sealing strip 103 is located above the lower heat-sealing strip 104. There are chutes on the column frames for facilitating the up and down sliding of the upper heat-sealing strip 103 and the lower heat-sealing strip 104. At the front ends of the upper heat-sealing strip 103 and the lower heat-sealing strip 104, there is a positive and negative lead screw 102. The two threads of the positive and negative lead screw 102 have opposite helix directions from the middle to both ends. The positive and negative lead screw 102 is rotatably connected in the chute of the front column frame. The input end of the positive and negative lead screw 102 is fixedly provided with a stepping motor 101. On both sides of the column frame, there are respectively rotatably connected an alignment link A 105 and an alignment link B 106. The short rod of the alignment link A 105 and the long rod of the alignment link B 106 are close to the front column frame, and the long rod of the alignment link A 105 and the short rod of the alignment link B 106 are close to the rear column frame. The lower ends of the short rods of the alignment link A 105 and the alignment link B 106 are both movably connected with the upper heat-sealing strip 103, and the lower ends of the long rods of the alignment link A 105 and the alignment link B 106 are both movably connected with the lower heat-sealing strip 104. At the upper end of the mounting frame 107, there is installed a pre-pressing port assembly 2. The pre-pressing port assembly 2 includes a pressing port cylinder 201. The pressing port cylinders 201 are symmetrically installed at the upper end of the mounting frame 107. The telescopic end of the pressing port cylinder 201 is installed with a pressing rod 202. When the part of the plastic bag 5 to be horizontally sealed is located between the upper heat-sealing strip 103 and the lower heat-sealing strip 104, the telescopic end of the pressing port cylinder 201 of the pre-pressing port assembly 2 extends, pushing the pressing rod 202 to move downward to pre-close the place where the plastic bag 5 needs to be horizontally sealed. Subsequently, the stepping motor 101 rotates, driving the positive and negative lead screw 102 to rotate. Since the upper and lower thread parts of the positive and negative lead screw 102 have opposite helix directions, the upper heat-sealing strip 103 and the lower heat-sealing strip 104 move towards the middle along the column frames of the mounting frame 107. While the upper heat-sealing strip 103 and the lower heat-sealing strip 104 approach each other, the alignment link A 105 and the alignment link B 106 flip synchronously. The short rods of the alignment link A 105 and the alignment link B 106 slide along the chute of the upper heat-sealing strip 103, and the long rods of the alignment link A 105 and the alignment link B 106 slide along the chute of the lower heat-sealing strip 104, so that the upper heat-sealing strip 103 and the lower heat-sealing strip 104 are always in a parallel position, thus ensuring uniform horizontal sealing.

[0027] In this embodiment: The conveying assembly 4 includes a first conveyor belt 402. On both the front and rear sides of the first conveyor belt 402, there are installed web plates 408. At both ends of the first conveyor belt 402, there are support rollers A406. At the input end of the support roller A406, a motor 401 is fixedly arranged. On one side of the support roller A406, there is fixedly connected a large pulley 404. On one side of the first conveyor belt 402, there is a second conveyor belt 403. At both ends of the second conveyor belt 403, there are support rollers B407. On one side of the support roller B407, there is fixedly connected a small pulley 405. A belt is circumferentially sleeved on the large pulley 404 and the small pulley 405. When the motor 401 rotates, it drives the support roller A406 to rotate, thereby driving the first conveyor belt 402 to rotate. While the support roller A406 rotates, it drives the large pulley 404 to rotate. The large pulley 404 makes the small pulley 405 rotate through the belt, thereby making the second conveyor belt 403 rotate, and the speed is higher than that of the first conveyor belt 402, which is beneficial to taking away the horizontally sealed plastic bag 5 from the mounting rack 107.

[0028] In this embodiment: The calibration assembly 3 includes a calibration plate 303. Two calibration plates 303 are symmetrically arranged above the first conveyor belt 402, and the bottom surfaces of the two calibration plates 303 do not contact the first conveyor belt 402. At the upper end of the calibration plate 303, there is a sliding rail 302. At the upper end of the calibration plate 303, there is a notch opened for facilitating its sliding on the sliding rail 302. At the sliding groove near the motor 401, there is a pin 304 for fixing the position of the calibration plate 303. Both ends of the sliding rail 302 are fixedly connected with mounting flats 301. The lower ends of the mounting flats 301 are fixedly connected with the web plates 408. According to the size of the plastic bag 5, the position of the calibration plate 303 is adjusted along the sliding rail 302. After determining the position, the pin 304 is tightened to fix the calibration plate 303. The plastic bag 5 moves along with the first conveyor belt 402. At this time, both ends of the plastic bag 5 are attached to the side walls of the calibration plate 303, and then the position of the plastic bag 5 is adjusted to the position required for horizontal sealing.

[0029] Working principle: The motor 401 rotates, driving the supporting roller A 406 to rotate, thereby driving the first conveyor belt 402 to rotate. The plastic bag 5 moves along with the first conveyor belt 402. At this time, both ends of the plastic bag 5 are attached to the side walls of the alignment plate 303, and then the position of the plastic bag 5 is adjusted to the position required for horizontal sealing. When the part of the plastic bag 5 to be horizontally sealed is located between the upper sealing strip 103 and the lower sealing strip 104, the motor 401 stops rotating. The telescopic end of the pressing cylinder 201 of the pre-pressing port assembly 2 extends, pushing the pressing rod 202 to move downward to pre-close the part of the plastic bag 5 to be horizontally sealed. Subsequently, the stepping motor 101 rotates, driving the left and right threaded lead screw A 102 to rotate. Since the two threaded parts of the upper and lower parts of the left and right threaded lead screw A 102 have opposite helix directions, the upper sealing strip 103 and the lower sealing strip 104 move towards the middle along the column frame of the mounting bracket 107. While the upper sealing strip 103 and the lower sealing strip 104 approach each other, the alignment link A 105 and the alignment link B 106 flip synchronously. The short rods of the alignment link A 105 and the alignment link B 106 slide along the chute of the upper sealing strip 103, and the long rods of the alignment link A 105 and the alignment link B 106 slide along the chute of the lower sealing strip 104, ensuring that the upper sealing strip 103 and the lower sealing strip 104 are always in a parallel position, thus ensuring uniform horizontal sealing. After the horizontal sealing of the plastic bag 5 is completed, the stepping motor 101 rotates in the reverse direction, the upper sealing strip 103 and the lower sealing strip 104 move away from each other, and the telescopic end of the pressing cylinder 201 retracts, pushing the pressing rod 202 to move upward. At this time, the motor 401 starts to rotate, and the plastic bag 5 is conveyed onto the second conveyor belt 403;

[0030] When the motor 401 drives the supporting roller A 406 to rotate, the supporting roller A 406 drives the large pulley 404 to rotate. The large pulley 404 drives the small pulley 405 to rotate through the belt, thereby driving the second conveyor belt 403 to rotate, and the speed is higher than that of the first conveyor belt 402, which is beneficial to taking away the horizontally sealed plastic bag 5 from the mounting bracket 107.

[0031] The above shows and describes the basic principle, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed.

Claims

1. A transverse sealing mechanism for processing plastic bags, comprising a conveying assembly (4), wherein a correction assembly (3) for correcting the position of a plastic bag (5) is provided on the front side of the conveying assembly (4), characterized in that: A transverse sealing component (1) for hot pressing and sealing the plastic bag (5) is provided between the conveying components (4); The transverse sealing assembly (1) comprises a mounting frame (107), the mounting frame (107) is provided with two column frames, and the two column frames are located at the front and rear sides of the mounting frame (107), and the upper and lower sides of the column frames are respectively slidably connected with an upper sealing strip (103) and a lower sealing strip (104), the upper sealing strip (103) is located above the lower sealing strip (104), and the column frames are provided with a slide groove for facilitating the upper and lower sliding of the upper sealing strip (103) and the lower sealing strip (104), and the front ends of the upper sealing strip (103) and the lower sealing strip (104) are provided with positive and negative threaded screws (102), and the positive and negative threaded screws (102) are rotatably connected in the slide groove of the front column frame, and the positive and negative threaded screws (102) are output A stepper motor (101) is fixedly arranged at the inlet end, and an alignment link A (105) and an alignment link B (106) are rotatably connected on both sides of the column frame, the short rod of the alignment link A (105) and the long rod of the alignment link B (106) are close to the column frame on the front side, and the long rod of the alignment link A (105) and the short rod of the alignment link B (106) are close to the column frame on the rear side, the lower ends of the short rods of the alignment link A (105) and the alignment link B (106) are movably connected to the upper sealing strip (103), and the lower ends of the long rods of the alignment link A (105) and the alignment link B (106) are movably connected to the lower sealing strip (104), and a pre-pressing port assembly (2) is installed at the upper end of the mounting frame (107).

2. A transverse sealing mechanism for plastic bag processing according to claim 1, characterized in that: The pre-pressing port assembly (2) comprises a pressing port cylinder (201), wherein the pressing port cylinder (201) is symmetrically mounted on the upper end of the mounting frame (107), and a pressing rod (202) is mounted on the telescopic end of the pressing port cylinder (201).

3. A transverse sealing mechanism for plastic bag processing according to claim 1, characterized in that: The transmission component (4) comprises a first conveyor belt (402), spoke plates (408) are installed on both the front and rear sides of the first conveyor belt (402), support rollers A (406) are arranged at both ends of the first conveyor belt (402), a motor (401) is fixedly arranged at the input end of the support roller A (406), a second conveyor belt (403) is arranged on one side of the first conveyor belt (402), support rollers B (407) are arranged at both ends of the second conveyor belt (403), and a transmission component for driving the support roller B (407) to rotate is arranged at the ends of the first conveyor belt (402) and the second conveyor belt (403) that are close to each other.

4. A transverse sealing mechanism for plastic bag processing according to claim 3, characterized in that: The correction component (3) comprises a correction plate (303), two correction plates (303) are symmetrically arranged on the upper part of the first conveyor belt (402), and the bottom surfaces of the two correction plates (303) do not contact the first conveyor belt (402), a sliding rail (302) is arranged on the upper end of the correction plate (303), a groove is opened on the upper end of the correction plate (303) for facilitating its sliding on the sliding rail (302), a pin (304) for fixing the position of the correction plate (303) is arranged in the slide groove near the motor (401), both ends of the sliding rail (302) are fixedly connected with a mounting plate (301), and the lower end of the mounting plate (301) is fixedly connected to the spoke plate (408).

5. A transverse sealing mechanism for plastic bag processing according to claim 4, characterized in that: The two threads of the forward and reverse thread screw (102) have different rotation directions from the middle to the two ends.

6. A transverse sealing mechanism for plastic bag processing according to claim 3, characterized in that: The transmission assembly comprises a large pulley (404), wherein the large pulley (404) is fixedly connected to the support roller A (406), and one side of the large pulley (404) is a small pulley (405), wherein the small pulley (405) is fixedly connected to the support roller B (407).

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