Sealing device for square-bottom valve bag

Abstract

The utility model relates to the technical field of sealing equipment, and discloses a sealing device for a square bottom valve bag, which comprises a working table, a stepping motor is fixedly arranged on the side wall of the working table, the output end of the stepping motor is in transmission connection with a conveying belt, and a heat sealing assembly is arranged on the upper surface of the working table. Through the arrangement of the heat sealing assembly, when the end of the square-bottom valve bag makes contact with the surface of the hot-pressing operation plate, due to the fact that the hot-pressing operation plate moves in the clockwise direction and is matched with the arrangement of an attaching spring, a pressing plate with the end in a cambered surface shape can press the square-bottom valve bag in the vertical direction; meanwhile, the side face of the hot-pressing operation plate can be tightly attached to the side face of the square-bottom valve bag so as to achieve hot-pressing sealing operation on the square-bottom valve bag, and along with continuous rotation of the rotating shaft, the hot-pressing operation plate cannot excessively extrude the square-bottom valve bag in cooperation with the arrangement of a rotating ring and a first volute spiral spring; and the continuous hot-pressing sealing operation can be carried out without stopping the conveyor belt.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing equipment, in particular to a sealing device for a square bottom valve bag. Background Art

[0002] Square bottom valve bags are a common packaging material. Square bottom valve bags are made on the basis of paper-plastic composite bags or kraft paper bags. The specifications and sizes are based on customer requirements. Environmentally friendly glue is used and they are manually folded to make packaging bags with upper and lower seals, or lower seals and upper openings. Square bottom valve bags need to be sealed during production.

[0003] According to a sealing device for square bottom valve bags disclosed (publication number: CN218022541U), in the above application, a heat sealing mechanism is set up, the electric push rod is started to make its free end descend, the electric push rod is extended to drive the shell to descend, the hot pressing operation plate and the positioning strip are lowered with the shell, the positioning strip first fixes the square bottom valve bag, and then the hot pressing operation plate heat-seals the square bottom valve bag, so that the square bottom valve bag can be positioned before sealing, and there is no need to stop the conveyor belt, thereby avoiding displacement of the square bottom valve bag during sealing.

[0004] However, in actual use of the above-mentioned equipment, during the transmission of the square bottom valve bags, it is easy for the square bottom valve bags to shift on the conveyor belt due to the relative movement of the equipment during the sealing process by the heat sealing equipment, which leads to poor sealing effect of the square bottom valve bags during heat sealing, thereby reducing the overall processing yield of the device; in view of this, we propose a sealing device for square bottom valve bags. Utility Model Content

[0005] The utility model aims to provide a sealing device for a square bottom valve bag to solve the problems raised in the above background technology.

[0006] To achieve the above object, the utility model provides the following technical solution: a sealing device for a square bottom valve bag, comprising a workbench, a stepper motor is fixedly mounted on the side wall of the workbench, a conveyor belt is connected to the output end of the stepper motor, and a heat sealing component is arranged on the upper surface of the workbench, and the heat sealing component comprises:

[0007] A U-shaped frame, the upper surface of the workbench is fixedly mounted with the U-shaped frame, the side wall of the U-shaped frame is fixedly mounted with an idle motor, and the output end of the idle motor is fixedly mounted with a rotating shaft;

[0008] A rotating sleeve, wherein the rotating sleeve is sleeved on the arc-shaped outer wall of the rotating shaft, and a hot pressing operation plate is fixedly mounted on the arc-shaped outer wall of the rotating sleeve through a connecting plate;

[0009] A round rod, the inner wall of the hot pressing work plate is penetrated by the round rod, and the round rod is slidably connected to the hot pressing work plate, the bottom end of the round rod is fixedly installed with a pressing plate, the top end of the round rod is fixedly installed with a round plate, and a clamping spring is fixedly connected between the lower surface of the round plate and the upper surface of the hot pressing work plate;

[0010] A rotating ring is fixedly mounted on the arc-shaped outer wall of the rotating shaft, and a spiral spring is sleeved on the arc-shaped outer wall of the rotating ring.

[0011] Preferably, the number of the rotating sleeves is set to six groups, and the six groups of rotating sleeves are evenly distributed on the arc-shaped outer wall of the rotating shaft in a linear array, the number of the hot pressing work plates is set to three groups, and the three groups of hot pressing work plates are evenly distributed on the arc-shaped outer wall of the rotating shaft in a circular array, and every two groups of rotating sleeves are arranged corresponding to one group of hot pressing work plates, so that the square bottom valve bags on the conveyor belt can be continuously heat-sealed when the rotating shaft rotates.

[0012] Preferably, the hot pressing work plate is arranged in an L shape, and a heating device is arranged inside the hot pressing work plate.

[0013] Preferably, the lower surface of the pressing plate away from the hot pressing work plate is arranged in an arc shape, so that when the hot pressing work plate approaches the square bottom valve bag on the conveyor belt as the rotating shaft rotates, the pressing plate will not cause excessive pushing force on the outer wall of the square bottom valve bag.

[0014] Preferably, a receiving groove matching the size of the pressing plate is provided on the lower surface of the hot pressing operation plate, so that when the pressing plate contacts the surface of the square bottom valve bag and is subjected to a reverse force and moves upward, the pressing plate can be completely pressed into the receiving groove.

[0015] Preferably, an anti-deviation component is provided on the outer wall of the conveyor belt, and the anti-deviation component includes a horizontal bar, and the horizontal bar is fixedly installed on the outer wall of the conveyor belt, and a transmission cavity is provided inside the horizontal bar, and a square plate is slidably installed on the inner wall of the transmission cavity, and a clamping spring is fixedly connected between the square plate and the inner wall of the bottom end of the transmission cavity, and a rotating rod is rotatably installed on the inner wall of the square plate, and a contact plate passes through the rotating rod, and the contact plate is fixedly connected to the rotating rod, and a spiral spring 2 is sleeved on the arc-shaped outer wall of the rotating rod.

[0016] Compared with the prior art, the utility model provides a sealing device for square bottom valve bags, which has the following beneficial effects:

[0017] 1. The sealing device for the square bottom valve bag is provided with a heat sealing component, which cooperates with the rotating shaft to keep the conveyor belt rotating in the opposite direction of movement. When the end of the square bottom valve bag contacts the surface of the hot pressing operation plate, the hot pressing operation plate moves in the clockwise direction, and the setting of the clamping spring is cooperated, so that the pressing plate with an arc surface at the end will press the square bottom valve bag in the vertical direction, and at the same time, the side of the hot pressing operation plate will be tightly attached to the side of the square bottom valve bag to realize the hot pressing sealing operation. With the continuous rotation of the rotating shaft, the setting of the rotating ring and the scroll spring is cooperated, so that the hot pressing operation plate will not excessively squeeze the square bottom valve bag, and continuous hot pressing sealing operation can be performed without stopping the conveyor belt.

[0018] 2. The sealing device for the square bottom valve bag is provided with an anti-deviating component. When the square bottom valve bag on the conveyor belt is pushed by the hot pressing working plate and moves toward one side of the horizontal bar, the contact plate is squeezed by the square bottom valve bag and generates squeezing force on the other plate. Under the restriction of the inner wall of the transmission cavity, the two groups of contact plates have a movement tendency of deflecting toward the center of the square plate with the rotating rod as the rotation center, so as to better position the surface of the other bottom valve bag and prevent it from lateral displacement on the surface of the conveyor belt, thereby ensuring the safety and accuracy of the sealing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the partial three-dimensional structure of the U-shaped frame of the utility model;

[0021] Figure 3 This is a schematic diagram of a partial explosion of a heat-sealing component of the utility model;

[0022] Figure 4 It is a schematic diagram of a partial three-dimensional structure of the heat sealing component of the utility model;

[0023] Figure 5 It is a schematic diagram of a partial three-dimensional structure of the conveyor belt of the utility model;

[0024] Figure 6 This is a schematic diagram of the structure of the anti-deviation component of the utility model.

[0025] In the figure: 1. workbench; 2. stepper motor; 3. conveyor belt; 4. heat sealing assembly; 41. U-shaped frame; 42. idle motor; 43. rotating shaft; 44. rotating sleeve; 45. hot pressing operation plate; 46. round rod; 47. pressure plate; 48. round plate; 49. pressing spring; 410. rotating ring; 411. scroll spring one; 5. anti-deviating assembly; 51. horizontal bar; 52. square plate; 53. pressing spring; 54. rotating rod; 55. contact plate; 56. scroll spring two. DETAILED DESCRIPTION

[0026] like Figure 1-Figure 6 As shown, the utility model provides a technical solution: a sealing device for a square bottom valve bag, comprising a workbench 1, a stepper motor 2 is fixedly installed on the side wall of the workbench 1, a conveyor belt 3 is transmission-connected to the output end of the stepper motor 2, a heat sealing component 4 is arranged on the upper surface of the workbench 1, and the heat sealing component 4 includes a U-shaped frame 41, an idle motor 42, a rotating shaft 43, a rotating sleeve 44, a hot pressing operation plate 45, a round rod 46, a pressure plate 47, a round plate 48, a clamping spring 49, a rotating ring 410 and a scroll spring 411.

[0027] In one embodiment of the utility model, a U-shaped frame 41 is fixedly installed on the upper surface of the workbench 1, an idle motor 42 is fixedly installed on the side wall of the U-shaped frame 41, a rotating shaft 43 is fixedly installed on the output end of the idle motor 42, a rotating sleeve 44 is sleeved on the arc-shaped outer wall of the rotating shaft 43, a hot pressing work plate 45 is fixedly installed on the arc-shaped outer wall of the rotating sleeve 44 through a connecting plate, a round rod 46 passes through the inner wall of the hot pressing work plate 45, and the round rod 46 is slidably connected to the hot pressing work plate 45, a pressing plate 47 is fixedly installed on the bottom end of the round rod 46, a round plate 48 is fixedly installed on the top end of the round rod 46, a clamping spring 49 is fixedly connected between the lower surface of the round plate 48 and the upper surface of the hot pressing work plate 45, a rotating ring 410 is fixedly installed on the arc-shaped outer wall of the rotating shaft 43, and a volute spring 411 is sleeved on the arc-shaped outer wall of the rotating ring 410.

[0028] Furthermore, two groups of transmission rollers which can be connected to the conveyor belt 3 are arranged inside the workbench 1. By starting the stepper motor 2, the transmission rollers can be cooperated to drive the conveyor belt 3 to move inside the workbench 1, thereby realizing the production process of loading materials from the left side of the workbench 1 and unloading materials from the right side of the workbench 1. At the same time, the rotating shaft 43 is rotatably installed on the inner surface of the U-shaped frame 41, and the rotating shaft 43 is kept in a horizontal state, so that the square bottom valve bag passing through the U-shaped frame 41 can stably receive the hot pressing sealing effect. In addition, the number of rotating sleeves 44 is set to six groups, and the six groups of rotating sleeves 44 are evenly distributed on the arc-shaped outer wall of the rotating shaft 43 in a linear array. Specifically, one corresponding to each two groups of rotating sleeves 44 is arranged. There are three groups of hot pressing work plates 45, so that three groups of hot pressing work plates 45 are arranged on the outside of the rotating shaft 43. Specifically, the three groups of hot pressing work plates 45 are evenly distributed on the arc-shaped outer wall of the rotating shaft 43 in a circular array. Furthermore, the connecting parts between the three groups of hot pressing work plates 45 and their corresponding rotating sleeves 44 are staggered, so that the three groups of hot pressing work plates 45 do not interfere with each other as the rotating sleeve 44 rotates on the rotating shaft 43, thereby ensuring the stable operation of the hot pressing work plates 45. At the same time, the hot pressing work plates 45 are arranged in an L shape, and a corresponding heating device is arranged inside the hot pressing work plates 45 to increase the temperature of the corresponding contact position of the hot pressing work plates 45, thereby facilitating the sealing operation of the other bottom valve bag.

[0029] In addition, a circular hole adapted to the round rod 46 is opened on the inner wall of the hot pressing work plate 45, and the round rod 46 is arranged inside the circular hole. Specifically, the clamping spring 49 is sleeved on the arc-shaped outer wall of the round rod 46, so that the clamping spring 49 can provide a stable elastic transmission force for the circular plate 48. At the same time, the lower surface of the pressing plate 47 away from the hot pressing work plate 45 is arranged in an arc shape, so that when the hot pressing work plate 45 is close to the square bottom valve bag on the conveyor belt 3 as the rotating shaft 43 rotates, the pressing plate 47 does not It will cause excessive pushing force on the outer wall of the square bottom valve bag, which will cause the square bottom valve bag to deviate on the conveyor belt 3. Furthermore, the lower surface of the hot pressing operation plate 45 is provided with a storage groove that is adapted to the size of the pressing plate 47, so that when the pressing plate 47 contacts the surface of the square bottom valve bag and is subjected to a reverse force and moves upward, the pressing plate 47 can be completely pressed into the storage groove, thereby ensuring the surface integrity of the hot pressing operation plate 45, so that the square bottom valve bag can obtain a smooth hot pressing sealing effect.

[0030] In an embodiment of the utility model, an anti-deviation component 5 is provided on the outer wall of the conveyor belt 3, and the anti-deviation component 5 includes a horizontal bar 51. The horizontal bar 51 is fixedly installed on the outer wall of the conveyor belt 3, and a transmission cavity is provided inside the horizontal bar 51. A square plate 52 is slidably installed on the inner wall of the transmission cavity. A clamping spring 53 is fixedly connected between the square plate 52 and the inner wall of the bottom end of the transmission cavity. A rotating rod 54 is rotatably installed on the inner wall of the square plate 52. The rotating rod 54 passes through a contact plate 55, and the contact plate 55 is fixedly connected to the rotating rod 54. A spiral spring 56 is sleeved on the arc-shaped outer wall of the rotating rod 54.

[0031] Specifically, the number of anti-deviation components 5 is set to be several groups, and the several groups of anti-deviation components 5 are evenly distributed on the outer wall of the conveyor belt 3, and the distance between two adjacent groups of anti-deviation components 5 is greater than the length of the square bottom valve bag, so that the square bottom valve bag can be better placed on the conveyor belt 3 for transmission and sealing processing. At the same time, the number of rotating rods 54, contact plates 55 and volute springs 56 is set to be two groups, and the two groups of rotating rods 54, contact plates 55 and volute springs 56 are mirror-distributed on the left and right sides of the vertical center axis of the square plate 52, and the volute springs 56 are mirror-distributed on the left and right sides of the vertical center axis of the square plate 52. In the initial state, the rotating rod 54 is given a movement tendency to drive the contact plate 55 to swing toward the side away from the center of the square plate 52, so that when the side of the horizontal bar 51 is contacted by the square bottom valve bag and squeezes the contact plate 55, the contact plate 55 generates an extrusion force on the other plate 52, and under the restriction of the inner wall of the transmission cavity, the two groups of contact plates 55 have a movement tendency to deflect toward the center of the square plate 52 with the rotating rod 54 as the rotation center, so as to better position the surface of the other bottom valve bag and prevent it from lateral displacement on the surface of the conveyor belt 3, thereby ensuring the safety and accuracy of the sealing process.

[0032] In the utility model, when in use, the square bottom valve bag that needs to be sealed is placed on the conveyor belt 3. At this time, the stepper motor 2 is started, and the movement of the transmission roller is coordinated so that the conveyor belt 3 continuously drives the square bottom valve bag to move from left to right. At the same time, the idle motor 42 is started so that the rotating shaft 43 keeps rotating in the opposite direction of the movement of the conveyor belt 3. When the end of the square bottom valve bag contacts the surface of the hot pressing operation plate 45, since the hot pressing operation plate 45 moves in a clockwise direction, the pressing plate 47 with an arc-shaped end is pressed against the square bottom valve bag in the vertical direction by the setting of the clamping spring 49. At the same time, the side of the hot pressing operation plate 45 is tightly attached to the side of the square bottom valve bag to realize the hot pressing sealing operation. As the rotating shaft 43 continues to rotate, the setting of the rotating ring 410 and the scroll spring 411 is coordinated so that the hot pressing operation plate 45 will not excessively squeeze the square bottom valve bag, and the hot pressing sealing operation can be carried out continuously without stopping the conveyor belt 3.

[0033] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A sealing device for a square bottom valve bag, comprising a workbench (1), a stepper motor (2) being fixedly mounted on a side wall of the workbench (1), an output end of the stepper motor (2) being drivingly connected to a conveyor belt (3), Features: A heat sealing component (4) is arranged on the upper surface of the workbench (1), and the heat sealing component (4) comprises: A U-shaped frame (41), the upper surface of the workbench (1) is fixedly mounted with the U-shaped frame (41), the side wall of the U-shaped frame (41) is fixedly mounted with an idle motor (42), and the output end of the idle motor (42) is fixedly mounted with a rotating shaft (43); A rotating sleeve (44), the rotating sleeve (44) is sleeved on the arc-shaped outer wall of the rotating shaft (43), and a hot pressing operation plate (45) is fixedly mounted on the arc-shaped outer wall of the rotating sleeve (44) through a connecting plate; A round rod (46), the inner wall of the hot pressing work plate (45) is penetrated by the round rod (46), and the round rod (46) is slidably connected to the hot pressing work plate (45), a pressing plate (47) is fixedly installed at the bottom end of the round rod (46), a round plate (48) is fixedly installed at the top end of the round rod (46), and a clamping spring (49) is fixedly connected between the lower surface of the round plate (48) and the upper surface of the hot pressing work plate (45); A rotating ring (410) is fixedly mounted on the arc-shaped outer wall of the rotating shaft (43), and a spiral spring (411) is sleeved on the arc-shaped outer wall of the rotating ring (410).

2. A sealing device for a block bottom valve bag according to claim 1, Features: The number of the rotating sleeves (44) is six, and the six groups of rotating sleeves (44) are evenly distributed on the arc-shaped outer wall of the rotating shaft (43) in a linear array. The number of the hot pressing work plates (45) is three, and the three groups of hot pressing work plates (45) are evenly distributed on the arc-shaped outer wall of the rotating shaft (43) in a circular array. Every two groups of rotating sleeves (44) are arranged correspondingly to one group of hot pressing work plates (45).

3. A sealing device for a block bottom valve bag according to claim 1, Features: The hot pressing work plate (45) is arranged in an L shape, and a heating device is arranged inside the hot pressing work plate (45).

4. A sealing device for a block bottom valve bag according to claim 1, Features: The lower surface of the pressing plate (47) away from the hot pressing working plate (45) is arranged in an arc shape.

5. A sealing device for a block bottom valve bag according to claim 1, Features: The lower surface of the hot pressing work plate (45) is provided with a storage groove which is matched with the size of the pressing plate (47).

6. A sealing device for a block bottom valve bag according to claim 1, Features: An anti-deviation component (5) is arranged on the outer wall of the conveyor belt (3), and the anti-deviation component (5) comprises a horizontal bar (51). The horizontal bar (51) is fixedly mounted on the outer wall of the conveyor belt (3), and a transmission cavity is arranged inside the horizontal bar (51). A square plate (52) is slidably mounted on the inner wall of the transmission cavity, and a clamping spring (53) is fixedly connected between the square plate (52) and the inner wall of the bottom end of the transmission cavity. A rotating rod (54) is rotatably mounted on the inner wall of the square plate (52), and a contact plate (55) passes through the rotating rod (54), and the contact plate (55) is fixedly connected to the rotating rod (54), and a spiral spring 2 (56) is sleeved on the arc-shaped outer wall of the rotating rod (54).

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