Ironing bar mechanism for adapting a bag making machine

Abstract

This utility model discloses a heat sealing mechanism for use with a bag-making machine, relating to the field of bag-making technology. It includes a shelf mounted on the bag-making machine production line, on which a heat sealing assembly is positioned above the production line, and a drive assembly for driving the heat sealing assembly to move towards the production line. The drive assembly includes a rotatable shaft and a follower component sleeved on the shaft. The follower component has a protrusion whose movement trajectory intersects with the position of the heat sealing assembly, driving the heat sealing assembly towards the production line to achieve heat sealing. This utility model integrates the drive assembly and the heat sealing assembly directly above the production line via a shelf, ensuring that the heat sealing action acts vertically on the bag-making station, offering the advantage of a reasonable spatial layout. Furthermore, the design of the rotating shaft driving the follower protrusion precisely converts the rotational motion into a linear downward pressing action of the heat sealing assembly, offering the advantage of efficient motion conversion.

Description

Technical Field

[0001] This utility model relates to the field of bag making technology, specifically to a hot strip mechanism for adapting to a bag making machine. Background Technology

[0002] During the production process, bag making machines generally need to be equipped with a heat sealing mechanism to heat seal and press the edges of the packaging bags.

[0003] A search revealed that patent document CN220464920U discloses a heat-sealing seat for a bag-making machine. The heat-sealing seat includes a base body, a fixed platform fixedly connected to one side of the base body, a first motor fixedly connected to the bottom of the fixed platform, a lead screw fixedly connected to the output end of the first motor, a ball bearing nut rotatably connected to the outer surface of the lead screw, a movable arm fixedly connected to one side of the ball bearing nut, a connecting rod fixedly connected to the bottom surface of the movable arm, and a lower pressure plate fixedly connected to the bottom of the connecting rod. The lower pressure plate has a heat-pressing port inside. A first cylinder is fixedly connected to the top of the movable arm, and a second lower pressure plate is fixedly connected to the output end of the first cylinder.

[0004] In operation, the aforementioned heat sealing seat uses a first cylinder to drive a second lower pressure plate, causing the toothed pressure blocks on the lower pressure plate to heat-seal the bag opening. However, given the diverse production needs of existing bag-making machines, these machines do not produce only one type of bag but adjust according to production requirements. When producing bags with shorter or narrower lengths or widths, the frequency of heat-sealing increases. If the first cylinder is chosen as the drive structure for heat-sealing, the cylinder's inherent characteristics result in a longer time for a single reciprocating motion. To accommodate this drive structure, the production line speed must be reduced. However, for the current demand for high-efficiency production, this reduction in production line speed is not an optimal solution. Therefore, we propose a heat sealing mechanism adapted to different production line speeds of bag-making machines to meet various bag-making needs. Utility Model Content

[0005] The purpose of this utility model is to solve the problems in the prior art by proposing a heat-sealing mechanism for adapting to bag making machines. This heat-sealing mechanism achieves adjustable motion frequency of the heat-sealing component by setting a drive assembly composed of a shaft and various follower components, so as to adapt to different production line speeds of bag making machines.

[0006] To solve the above problems, this utility model provides the following technical solution:

[0007] The heat sealing mechanism for adapting to a bag making machine includes a shelf mounted on the bag making machine production line. The shelf is provided with a heat sealing assembly located above the bag making machine production line and a drive assembly for driving the heat sealing assembly to move toward the bag making machine production line. The drive assembly includes a rotatable shaft and a follower component sleeved on the shaft. The follower component has a protrusion, and the movement trajectory of the protrusion intersects with the position of the heat sealing assembly to drive the heat sealing assembly toward the bag making machine production line to achieve heat sealing.

[0008] As a further embodiment of this utility model: the protrusions are configured as multiple parts and arranged in a circumferential array on the follower component, so that when the shaft makes one revolution, the multiple protrusions sequentially drive the hot strip assembly to move.

[0009] As a further embodiment of this utility model: the follower components are configured as multiple components, and the protrusions on any two adjacent follower components are arranged at an angle, so that when the shaft makes one revolution, the multiple protrusions sequentially drive the hot ironing strip assembly to move.

[0010] As a further embodiment of this utility model, the edge of the protrusion is arranged in a smooth curve.

[0011] As a further embodiment of this utility model: a drive motor is fixedly installed on the shelf, and the output shaft of the drive motor is connected to the shaft body for transmission.

[0012] As a further embodiment of this utility model: the ironing strip assembly includes an ironing strip seat that is movably disposed on a shelf along the vertical direction, a follower component that is in contact with the top of the ironing strip seat, a plurality of heating blocks being disposed at the bottom of the ironing strip seat, and an ironing strip being fixedly disposed at the bottom of the plurality of heating blocks, the ironing strip being located above the bag making machine production line.

[0013] As a further embodiment of this utility model: the shelf is evenly distributed with multiple guide rods arranged vertically, the ironing strip seat is sleeved on the multiple guide rods, and the shelf is provided with an elastic element fixedly connected to the ironing strip seat. The elastic element is used to make the ironing strip seat have a vertical upward movement tendency.

[0014] As a further embodiment of this utility model: the elastic element is a return spring and is sleeved on the outside of the guide rod.

[0015] As a further embodiment of this utility model: the shaft is arranged along the length direction of the heating strip seat.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The storage rack integrates the drive component and the heat sealing component directly above the production line, ensuring that the heat sealing action acts vertically on the bag making station, which has the advantage of reasonable spatial layout; and through the design of the rotating shaft driving the protrusion to follow, the rotational motion is accurately converted into the linear pressing action of the heat sealing component, which has the advantage of efficient motion conversion; compared with the cylinder drive in the prior art, the linkage drive in this application does not require manual intervention and perfectly adapts to the cycle time requirements of continuous bag making production lines.

[0018] 2. Multiple circumferential array protrusions enable the shaft to trigger multiple heat seals with a single rotation, significantly increasing the output per unit time; and the sequential drive mechanism of the protrusions avoids intermittent operation, ensuring continuous and uninterrupted operation of the production line.

[0019] 3. The distributed follower component design reduces the risk of single-point failure and extends the service life of the mechanism; and the angle difference layout of adjacent protrusions enables staggered driving and reduces instantaneous load impact.

[0020] 4. The elastic element provides a constant rebound force, which not only ensures that the heat exchange strip can return to its original position immediately, but also allows the heat exchange strip to quickly detach from the material to prevent sticking. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings.

[0022] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0023] Figure 2 This is a schematic diagram of the first embodiment of the follower component of this utility model;

[0024] Figure 3 This is a schematic diagram of the second embodiment of the follower component of this utility model;

[0025] Figure 4 This is a schematic diagram of the third embodiment of the follower component of this utility model;

[0026] Figure 5 This is a schematic diagram of the assembly structure of the shaft of this utility model and the follower components in the state of multiple first embodiments.

[0027] In the diagram: 1. Shelf; 2. Shaft; 3. Follower component; 301. Protrusion; 4. Drive motor; 5. Ironing strip holder; 6. Heating block; 7. Ironing strip; 8. Guide rod; 9. Elastic component; a. Bag making machine production line. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0029] Based on the conventional bag-making machine production line a in the existing technology, the heat-sealing mechanism of this application is installed on the bag-making machine production line a, and it is used to perform heat-sealing and edge-pressing treatment on the packaging bags of the bag-making machine production line a. The heat-sealing mechanism can be adapted for different bag-making needs of the bag-making machine production line a, and its specific composition is as follows:

[0030] like Figures 1-5 As shown, the heat sealing mechanism includes a shelf 1, a heat sealing assembly, and a drive assembly. The shelf 1 is mounted on the production line truss or production line beam. The heat sealing assembly is vertically mounted on the shelf 1 and located above the bag making machine production line a. The heat sealing assembly is used to heat seal and press the edges of the packaging bags on the bag making machine production line a. The drive assembly is mounted on the shelf 1 and is used to drive the heat sealing assembly downward so that the heat sealing assembly can act downward on the packaging bags on the bag making machine production line a.

[0031] For the shelf 1 with an overall frame structure, a rectangular hole can be made on the shelf 1 for the ironing strip assembly to pass through.

[0032] The drive assembly includes a shaft 2 rotatably mounted on a shelf 1. A drive motor 4 is fixedly mounted on the shelf 1, and the output shaft of the drive motor 4 is connected to one end of the shaft 2. A follower component 3 is sleeved on the shaft 2. The follower component 3 has a protrusion 301 with a smooth curved edge. The protrusion 301 can rotate in a circular motion with the rotation of the shaft 2. The circular motion trajectory of the protrusion 301 intersects the position of the heat sealing strip assembly. Since the heat sealing strip assembly is vertically movable, a single circular motion of the protrusion 301 can drive the heat sealing strip assembly to move vertically downwards in a single stroke, so that the heat sealing strip assembly performs heat sealing and edge pressing on the packaging bags on the bag making machine production line a. It should be noted that the follower component 3 can be of the above form or a cam structure as in the prior art.

[0033] Compared to the existing technology that relies on cylinders to drive the downward movement of the heat exchange strip, the driving method of this application can control the time required for the protrusion 301 to rotate one revolution by adjusting the rotation speed of the shaft 2. Accordingly, the rotation speed of the shaft 2 can be set according to the production line speed of the bag making machine a, which has the advantages of rapid action and short single round trip time.

[0034] For the case where the follower component 3 drives the hot strip assembly to move downwards, this application has the following two designs:

[0035] (1) The follower component 3 is set to one, and the protrusion 301 is set to several (the specific number is determined according to the actual application), such as Figure 2 , Figure 3 and Figure 4 The examples show the cases where one, two, and three follower components are installed on the servo component 3, respectively. Figure 2 and Figure 3 In the shown state, the protrusions 301 on the follower member 3 are all arranged in a circumferential array. Figure 4 Taking the state shown as an example, during the process of driving the shaft 2 to rotate one revolution, the three sets of protrusions 301 on the follower component 3 will respectively abut against and drive the heat sealing strip assembly to move downward, that is, the heat sealing strip assembly will move downward three times in a row. This frequency of action can be adapted to the heat sealing process of the corresponding type of packaging bag.

[0036] (2) Multiple follower components 3 are configured (the specific number is determined according to the actual application), and one protrusion 301 is configured, such as Figure 5 This diagram illustrates a scenario where two sets of follower members 3 are mounted on the shaft 2. The two protrusions 301 on each set of follower members 3 are arranged at an angle. The mounting position of the follower members 3 on the shaft 2 can be adjusted according to actual conditions. Changing the mounting position of the follower members 3 will change the position of the protrusions 301. Therefore, the angle between the two protrusions 301 can be an obtuse angle, an acute angle, or a right angle. Figure 5 In the state shown, driving the shaft 2 to rotate one revolution will cause the heat-sealing strip assembly to move downwards twice in succession. This frequency of action can be adapted to the heat sealing process of the corresponding type of packaging bag.

[0037] The shelf 1 has multiple guide rods 8 evenly distributed along the vertical direction. Regarding the setting of the heat-sealing assembly, the heat-sealing assembly can be a conventional method in the prior art. This application proposes the following design: the heat-sealing assembly includes a heat-sealing seat 5, which is movably mounted on the multiple guide rods 8 along the vertical direction. Multiple heating blocks 6 are provided at the bottom of the heat-sealing seat 5, each heating block 6 being independently controlled. A heat-sealing strip 7 is fixedly provided at the bottom of the multiple heating blocks 6. The heat-sealing strip 7 is located above the bag-making machine production line a and is used to directly contact the packaging bag. The follower member 3 is in contact with the top of the heat-sealing seat 5, so that when the follower member 3 rotates, the protrusion 301 can drive the heat-sealing seat 5 to move downwards. In this design of the heat-sealing seat 5, in order to reduce space occupation, this application arranges the shaft 2 along the length direction of the heat-sealing seat 5.

[0038] Furthermore, in order to ensure that the ironing strip holder 5 automatically returns to its original position after being driven downward, this application provides an elastic element 9 fixedly connected to the ironing strip holder 5 on the shelf 1. The elastic element 9 is used to give the ironing strip holder 5 a tendency to move vertically upward, so that when the downward pressing action of the protrusion 301 on the ironing strip holder 5 is released, the elastic element 9 can drive the ironing strip holder 5 to move upward. Preferably, the elastic element 9 is a return spring and is sleeved on the outside of the guide rod 8.

[0039] The above description provides a detailed account of one embodiment of the present invention. However, this description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the claims of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A heat-sealing mechanism for use with a bag-making machine, characterized in that, The device includes a shelf (1) installed on the bag making machine production line (a). The shelf (1) is provided with a heat sealing assembly located above the bag making machine production line (a) and a drive assembly for driving the heat sealing assembly to move toward the bag making machine production line (a). The drive assembly includes a shaft (2) capable of rotation and a follower member (3) sleeved on the shaft (2). The follower member (3) has a protrusion (301). The movement trajectory of the protrusion (301) intersects with the position of the heat sealing assembly to drive the heat sealing assembly toward the bag making machine production line (a) to achieve heat sealing.

2. The hot-strip mechanism for adapting to a bag-making machine according to claim 1, characterized in that, The protrusions (301) are configured in multiples and arranged in a circumferential array on the follower member (3) so that when the shaft (2) makes one revolution, the multiple protrusions (301) sequentially drive the hot strip assembly to move.

3. The hot-strip mechanism for adapting to a bag-making machine according to claim 1, characterized in that, The follower component (3) is configured as a plurality of components, and the protrusions (301) on any two adjacent follower components (3) are arranged at an angle so that when the shaft (2) makes a rotational motion, the plurality of protrusions (301) sequentially drive the hot strip assembly to move.

4. The hot-stripping mechanism for adapting to a bag-making machine according to any one of claims 1-3, characterized in that, The edges of the protrusion (301) are arranged in a smooth curve.

5. The hot-stripping mechanism for adapting to a bag-making machine according to any one of claims 1-3, characterized in that, A drive motor (4) is fixedly installed on the shelf (1), and the output shaft of the drive motor (4) is connected to the shaft body (2) for transmission.

6. The hot-stripping mechanism for adapting to a bag-making machine according to any one of claims 1-3, characterized in that, The heat-sealing assembly includes a heat-sealing seat (5) that is movably mounted on a shelf (1) in the vertical direction. The follower (3) is in contact with the top of the heat-sealing seat (5). Multiple heating blocks (6) are provided at the bottom of the heat-sealing seat (5). Heat-sealing strips (7) are fixedly mounted at the bottom of the multiple heating blocks (6). The heat-sealing strips (7) are located above the bag-making machine production line (a).

7. The hot-stripping mechanism for adapting to a bag-making machine according to claim 6, characterized in that, The shelf (1) is evenly distributed with multiple guide rods (8) arranged vertically. The ironing strip seat (5) is sleeved on the multiple guide rods (8). The shelf (1) is provided with an elastic element (9) fixedly connected to the ironing strip seat (5). The elastic element (9) is used to make the ironing strip seat (5) have a tendency to move vertically upward.

8. The hot-strip mechanism for adapting to a bag-making machine according to claim 7, characterized in that, The elastic element (9) is a return spring and is sleeved on the outside of the guide rod (8).

9. The hot-stripping mechanism for adapting to a bag-making machine according to claim 6, characterized in that, The shaft (2) is arranged along the length of the heating strip seat (5).

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