Transverse sealing mechanism for packaging bag

Abstract

The utility model discloses a packaging bag horizontal sealing mechanism, it includes horizontal sealing subassembly, elastic subassembly and transmission subassembly, horizontal sealing subassembly includes heat sealing seat, support seat, two heat sealing plate and cutter, the heat sealing seat and the support seat are spaced apart and can be close to each other or away from each other back to back, the two heat sealing plates are spaced apart from each other up and down opposite to each other, and the cutter is located between the two heat sealing plates. The two heat sealing plates are arranged on the supporting seat and are in sliding connection with the supporting seat, and the cutter is arranged between the two heat sealing plates and is in sliding connection with the supporting seat; the elastic assembly is connected with the two heat sealing plates or the cutter. The heat sealing and cutting device has the advantages that only one driver needs to be arranged to drive the heat sealing base and the supporting base to move close to each other or away from each other, other drivers do not need to be additionally arranged to drive the cutter to move, it is guaranteed that a packaging bag can be smoothly cut transversely after being sealed, timeliness of heat sealing and cutting actions is kept, and the sealing efficiency is improved. And the condition of cutting delay after heat sealing is avoided.

Description

Technical Field

[0001] This utility model relates to the field of packaging machine technology, and in particular to a horizontal sealing mechanism for packaging bags. Background Technology

[0002] A packaging machine is a machine used to package products, primarily for protection and aesthetic enhancement. Packaging machines are mainly divided into two types: assembly line-style integrated packaging and peripheral product packaging equipment. Currently, small-bag salt packaging machines are often used for packaging small bags of salt.

[0003] When packaging salt in a small bag packaging machine, the salt first enters the hopper through the material inlet and then enters the turntable through the material outlet. The turntable then feeds a measured amount of salt into the feeding pipe. Simultaneously, the packaging film is unwound by the unwinding rollers and guided by multiple guide rollers to the collar forming device and film stretching assembly, where the packaging film is automatically rolled into a cylindrical shape. After completion, the packaging mechanism performs vertical sealing and horizontal sealing of the bottom of the bag. Once the measured amount of salt has fallen into packaging bag A (the bottommost bag from the bottom up), the horizontal sealing mechanism performs horizontal cutting and sealing, sealing the top of packaging bag A and simultaneously sealing packaging bag B (…). The bottom of the second-to-last packaging bag (from bottom to top) is sealed. After sealing, packaging bag A slides into the slat and then falls onto the conveyor belt for transport. After a certain amount of salt falls into packaging bag B, the horizontal sealing mechanism performs a horizontal cutting and sealing action, that is, sealing the top of packaging bag B and simultaneously sealing the bottom of packaging bag C (the third-to-last packaging bag from bottom to top). After sealing, packaging bag B slides into the slat and then falls onto the conveyor belt for transport. This process is repeated to achieve automated and continuous salt packaging. No manual operation is required during the packaging process, which greatly improves production efficiency and reduces production costs.

[0004] Existing horizontal sealing mechanisms for packaging bags (such as the horizontal sealing unit with variable sealing direction disclosed in application number 201921059652.7) require two drivers to operate during the horizontal cutting and sealing process. One driver drives two heat-sealing plates to move closer to each other or further away from each other. When the two heat-sealing plates approach and abut against each other, heat sealing is achieved. The other driver drives a cutter to extend from inside the heat-sealing plate to achieve horizontal cutting. This type of horizontal sealing and cutting mechanism is prone to delays in cutting after heat sealing, which can cause the heat-sealed packaging bag to be unable to be cut smoothly. The mechanism needs to be adjusted regularly to maintain the timeliness of the heat sealing and cutting operations. Utility Model Content

[0005] The purpose of this utility model is to overcome the above-mentioned technical deficiencies and propose a packaging bag horizontal sealing mechanism to solve the technical problem that the existing technology uses two drivers to realize the horizontal cutting and sealing actions, which is prone to the situation of delayed cutting after heat sealing and requires regular adjustment of the mechanism to maintain the timeliness of heat sealing and cutting actions.

[0006] To achieve the above technical objectives, the present invention provides a horizontal sealing mechanism for packaging bags, comprising:

[0007] A horizontal sealing assembly includes a heat sealing seat, a support seat, two heat sealing plates and a cutter. The heat sealing seat and the support seat are spaced apart and can be close to each other or far apart. The two heat sealing plates are arranged vertically opposite each other and spaced apart, and are both slidably connected to the support seat. The cutter is disposed between the two heat sealing plates and is slidably connected to the support seat.

[0008] An elastic component is connected to the two heat-sealing plates or the cutter, such that the sides of the two heat-sealing plates closest to the heat-sealing seat are located outside the support base, and the side of the cutter closest to the heat-sealing seat is located inside the support base;

[0009] The transmission assembly is connected to both heat-sealing plates and the cutter to convert the synchronous reciprocating movement of the two heat-sealing plates in the horizontal direction into the reverse movement of the cutter in the horizontal direction.

[0010] Furthermore, the heat-sealing seat and the support seat are located in the same horizontal plane, and the gap between the heat-sealing seat and the support seat is used to allow the packaging bag to pass through from top to bottom.

[0011] Furthermore, there are two heat-sealing plates, which are arranged vertically opposite each other and spaced apart. The cutter is located between the two heat-sealing plates, and the two heat-sealing plates can move synchronously back and forth in the horizontal direction.

[0012] Furthermore, the support base has two first accommodating cavities and a second accommodating cavity, with the second accommodating cavity located between the two first accommodating cavities. The side wall of the first accommodating cavity near the heat sealing seat and the side wall of the second accommodating cavity near the heat sealing seat are both open. The two heat sealing plates are slidably disposed in the corresponding two first accommodating cavities, and the cutter is slidably disposed in the second accommodating cavity.

[0013] Furthermore, the elastic component includes a plurality of first elastic elements and a plurality of second elastic elements. Each of the first elastic elements is respectively disposed in two corresponding first accommodating cavities. One end of the first elastic element is connected to the heat-sealing plate, and the other end of the first elastic element is connected to the support base, so that the side of the heat-sealing plate near the heat-sealing base is located outside the first accommodating cavity. Each of the second elastic elements is disposed in the second accommodating cavity. One end of the second elastic element is connected to the cutter, and the other end of the second elastic element is connected to the support base, so that the side of the cutter near the heat-sealing base is located inside the second accommodating cavity.

[0014] Furthermore, the transverse sealing assembly also includes a blade holder, which is slidably disposed within the second accommodating cavity. The side of the cutter away from the heat sealing seat is fixedly connected to the blade holder, and one end of the second elastic member is connected to the blade holder.

[0015] Furthermore, the horizontal sealing assembly also includes a plurality of first limiting rods and a plurality of second limiting rods. Each of the first limiting rods is horizontally arranged and extends along the moving direction of the heat sealing plate. One end of each of the first limiting rods is fixedly connected to the heat sealing plate, and the other end of each of the first limiting rods slides through the support base and extends out of the first receiving cavity. Each of the second limiting rods is horizontally arranged and extends along the moving direction of the cutter. One end of each of the second limiting rods is fixedly connected to the cutter holder, and the other end of each of the second limiting rods slides through the support base and extends out of the second receiving cavity.

[0016] Furthermore, there are two transmission components, which are respectively disposed above and below the tool holder. One end of each transmission component is connected to the tool holder, and the other end of each transmission component is connected to the corresponding heat sealing plate, so as to convert the synchronous reciprocating movement of the two heat sealing plates in the horizontal direction into the reverse movement of the tool holder in the horizontal direction.

[0017] Furthermore, a first slope is provided on the side of the heat-sealing plate away from the heat-sealing seat, and a second slope is provided on the top and bottom of the cutter holder. The first slope on the heat-sealing plate above the cutter holder has an inclination direction opposite to that of the second slope at the top of the cutter holder, and the first slope on the heat-sealing plate below the cutter holder has an inclination direction opposite to that of the second slope at the bottom of the cutter holder. A guide channel is also provided on the support base. The guide channel extends vertically and connects the two first accommodating cavities and the second accommodating cavity. The transmission component is a push block. The top of the push block above the cutter holder slides against the corresponding first slope, and its bottom slides against the corresponding second slope. The bottom of the push block below the cutter holder slides against the corresponding first slope, and its top slides against the corresponding second slope.

[0018] Furthermore, the packaging bag horizontal sealing mechanism also includes a driving component, which is connected to both the heat sealing seat and the support seat, and is used to drive the heat sealing seat and the support seat to move closer to each other or further apart in the horizontal direction.

[0019] Furthermore, the packaging bag horizontal sealing mechanism also includes a bracket, and the heat sealing seat and the support seat are both slidably connected to the bracket.

[0020] Compared with the prior art, the beneficial effects of this utility model include: During use, the side of the heat-sealing plate closest to the heat-sealing seat pre-applies to the heat-sealing seat and gradually moves into the support base. Since the transmission assembly can convert the movement of the heat-sealing plate into the reverse movement of the cutter, the side of the cutter closest to the heat-sealing seat gradually moves out of the support base. When the side of the heat-sealing plate closest to the heat-sealing seat abuts against the heat-sealing seat, it works together with the heat-sealing seat to seal the packaging bag. When the side of the cutter closest to the heat-sealing seat gradually moves out of the support base, it seals the connection between the two packaging bags. The transverse sealing mechanism can convert the movement of the heat-sealing plate into the reverse movement of the cutter through the transmission component. After the heat-sealing plate and the heat-sealing seat work together to seal the packaging bag, the cutter can make a transverse cut at the joint between the two packaging bags. Only one driver is needed to drive the heat-sealing seat and the support seat to move closer to each other or further apart. No additional driver is needed to drive the movement of the cutter. This ensures that the packaging bag can be smoothly transversely cut after it is sealed, maintains the timeliness of heat sealing and cutting actions, and avoids the situation of cutting delay after heat sealing. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of a horizontal sealing mechanism for a packaging bag provided by this utility model;

[0022] Figure 2This is a three-dimensional structural diagram of a packaging bag horizontal sealing mechanism during sealing and horizontal cutting provided by this utility model;

[0023] Figure 3 yes Figure 1 A three-dimensional structural diagram of a horizontal sealing mechanism for packaging bags, omitting the drive component and bracket;

[0024] Figure 4 yes Figure 2 A three-dimensional structural diagram of a horizontal sealing mechanism for packaging bags, omitting the drive component and bracket;

[0025] Figure 5 This is a schematic diagram of the horizontal sealing assembly provided by this utility model after omitting the heat sealing seat;

[0026] Figure 6 This is a schematic diagram of the structure of the horizontal sealing component provided by this utility model after omitting the heat sealing seat and when sealing and transverse cutting;

[0027] Figure 7 This is a three-dimensional structural diagram of the support base provided by this utility model;

[0028] In the diagram: 100 - Horizontal sealing assembly, 110 - Heat sealing seat, 111 - Groove, 120 - Support seat, 121 - First receiving cavity, 122 - Second receiving cavity, 123 - Guide channel, 130 - Heat sealing plate, 131 - First ramp, 140 - Cutter, 150 - Cutter holder, 151 - Second ramp, 160 - First limiting rod, 170 - Second limiting rod, 200 - Elastic assembly, 210 - First elastic element, 220 - Second elastic element, 300 - Transmission assembly, 310 - Push block, 400 - Drive assembly, 410 - Telescopic drive element, 420 - Transmission element, 421 - Turntable, 422 - Connecting rod, 500 - Bracket, 510 - Outer frame, 520 - Guide rod. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0030] This utility model provides a horizontal sealing mechanism for packaging bags, the structure of which is as follows: Figure 1 - Figure 6As shown, the device includes a horizontal sealing assembly 100, an elastic assembly 200, and a transmission assembly 300. The horizontal sealing assembly 100 includes a heat-sealing seat 110, a support seat 120, two heat-sealing plates 130, and a cutter 140. The heat-sealing seat 110 and the support seat 120 are spaced apart and can be close to or away from each other. The two heat-sealing plates 130 are vertically opposite each other and spaced apart, and are both slidably connected to the support seat 120. The cutter 140 is disposed between the two heat-sealing plates 130 and is slidably connected to the support seat 120. The elastic component 200 is connected to the two heat-sealing plates 130 or the cutter 140, such that the side of the two heat-sealing plates 130 closest to the heat-sealing seat 110 is located outside the support seat 120, and the side of the cutter 140 closest to the heat-sealing seat 110 is located inside the support seat 120; the transmission component 300 is connected to both the two heat-sealing plates 130 and the cutter 140, so as to convert the synchronous reciprocating movement of the two heat-sealing plates 130 in the horizontal direction into the reverse movement of the cutter 140 in the horizontal direction.

[0031] In use, the packaging bag passes through the gap between the heat-sealing seat 110 and the support seat 120. The heat-sealing seat 110 and the support seat 120 move closer to each other. The two heat-sealing plates 130 are pre-contacted with the heat-sealing seat 110 on the side closest to it, and gradually move into the support seat 120. Since the transmission assembly 300 can convert the movement of the two heat-sealing plates 130 into the opposite movement of the cutter 140, the two heat-sealing plates... The cutter 140 gradually moves into the support base 120 from the side near the heat sealing seat 110, and gradually moves out of the support base 120 from the side near the heat sealing seat 110. When the two heat sealing plates 130 abut against the heat sealing seat 110, they work together with the heat sealing seat 110 to seal the packaging bag. The lower heat sealing plate 130 can seal packaging bag A (the bottommost packaging bag from bottom to top). The top sealing mechanism, with the heat-sealing plate 130 located above, can seal the bottom of packaging bag B (the second to last packaging bag from the bottom). As the cutter 140 gradually moves out of the support base 120 from the side near the heat-sealing seat 110, it can make a transverse cut at the connection between packaging bag A and packaging bag B. In this transverse sealing mechanism, the movement of the heat-sealing plate 130 can be converted into the reverse movement of the cutter 140 through the transmission component 300. After the heat-sealing plate 130 and the heat-sealing seat 110 work together to seal the packaging bag, the cutter 140 can make a transverse cut at the connection between the two packaging bags. Only one driver is needed to drive the heat-sealing seat 110 and the support base 120 to move closer to each other or further away from each other. No additional driver is needed to drive the movement of the cutter 140. This ensures that the packaging bag can be smoothly transversely cut after being sealed, maintains the timeliness of heat sealing and cutting actions, and avoids the situation of delayed cutting after heat sealing.

[0032] As a preferred embodiment, please refer to Figure 3 and Figure 4 The heat-sealing seat 110 and the support seat 120 are located in the same horizontal plane. The gap between the heat-sealing seat 110 and the support seat 120 is used to allow the packaging bag to pass through from top to bottom. In use, this horizontal sealing mechanism is installed directly below the film-pulling cylinder of the film-pulling assembly of the packaging machine, ensuring that the packaging bag can pass through the gap between the heat-sealing seat 110 and the support seat 120 from top to bottom.

[0033] As a preferred embodiment, please refer to Figure 5 and Figure 6The support base 120 has two first receiving cavities 121 and a second receiving cavity 122. The second receiving cavity 122 is located between the two first receiving cavities 121. The side wall of the first receiving cavity 121 near the heat sealing base 110 and the side wall of the second receiving cavity 122 near the heat sealing base 110 are both open. The two heat sealing plates 130 are slidably disposed in the corresponding two first receiving cavities 121, and the cutter 140 is slidably disposed in the second receiving cavity 122. The heat-sealing plate 130 can be accommodated through the first accommodating cavity 121, so that when the side of the heat-sealing plate 130 near the heat-sealing seat 110 is pushed inward by the heat-sealing seat 110, it can move into the first accommodating cavity 121. The cutter 140 can be accommodated through the second accommodating cavity 122, so that when the cutter 140 is not cutting the packaging bag horizontally, the side of the cutter 140 near the heat-sealing seat 110 can be located in the second accommodating cavity 122.

[0034] As a preferred embodiment, please refer to Figure 3 The heat sealing seat 110 has a groove 111, which is open on one side wall near the support seat 120. The groove 111 is used to allow the cutter 140 to extend into it to protect the cutter 140.

[0035] As a preferred embodiment, please refer to Figure 5 and Figure 6The elastic component 200 includes a plurality of first elastic elements 210 and a plurality of second elastic elements 220. Each first elastic element 210 is respectively disposed within two corresponding first receiving cavities 121. One end of each first elastic element 210 is connected to the heat-sealing plate 130, and the other end is connected to the support base 120, so that the side of the heat-sealing plate 130 near the heat-sealing base 110 is located outside the first receiving cavity 121. Each second elastic element 220 is disposed within a second receiving cavity 122. One end of the second elastic element 220 is connected to the cutter 140, and the other end of the second elastic element 220 is connected to the support 120, so that the side of the cutter 140 near the heat-sealing seat 110 is located in the second receiving cavity 122. When the heat-sealing seat 110 and the support 120 approach each other, the sides of the two heat-sealing plates 130 near the heat-sealing seat 110 are pre-aggregated against the heat-sealing seat 110. When the sides of the two heat-sealing plates 130 near the heat-sealing seat 110 are subjected to an inward pushing force applied by the heat-sealing seat 110, they can move into the corresponding first receiving cavity. Inside 121, at this time, each of the first elastic elements 210 is in a compressed state and accumulates compressive elastic potential energy. When the heat-sealing seat 110 and the support seat 120 move away from each other, the side of the two heat-sealing plates 130 near the heat-sealing seat 110 is no longer subjected to the inward pushing force exerted on it by the heat-sealing seat 110. Each of the first elastic elements 210 releases its compressive elastic potential energy, pushing the side of the two heat-sealing plates 130 near the heat-sealing seat 110 out of the corresponding two first receiving cavities 121. Since when the two heat-sealing plates 130 are close to the heat-sealing seat 110... When one side of the cutter 10 moves into the corresponding first receiving cavity 121, the side of the cutter 140 near the heat sealing seat 110 moves out of the second receiving cavity 122. At this time, each of the second elastic elements 220 is in a stretched state and accumulates tensile elastic potential energy. When the side of the two heat sealing plates 130 near the heat sealing seat 110 is no longer subjected to the inward pushing force exerted on it by the heat sealing seat 110, each of the second elastic elements 220 releases tensile elastic potential energy and pulls the side of the cutter 140 near the heat sealing seat 110 into the second receiving cavity 122.

[0036] As a preferred embodiment, please refer to Figure 5 and Figure 6 The horizontal sealing assembly 100 also includes a knife holder 150, which is slidably disposed in the second accommodating cavity 122. The side of the cutter 140 away from the heat sealing seat 110 is fixedly connected to the knife holder 150. One end of the second elastic member 220 is connected to the knife holder 150, so that the connection between the cutter 140 and the second elastic member 220 can be realized through the knife holder 150.

[0037] As a preferred embodiment, please refer to Figure 5 and Figure 6 The horizontal sealing assembly 100 further includes a plurality of first limiting rods 160 and a plurality of second limiting rods 170. Each first limiting rod 160 is horizontally arranged and extends along the moving direction of the heat-sealing plate 130. One end of each first limiting rod 160 is fixedly connected to the heat-sealing plate 130, and the other end of each first limiting rod 160 slides through the support base 120 and extends out of the first receiving cavity 121. Each second limiting rod 170 is horizontally arranged and extends along the moving direction of the cutter 140. One end of each second limiting rod 170 is fixedly connected to the heat-sealing plate 130. The cutter holder 150 is fixedly connected, and the other end of each of the second limiting rods 170 slides through the support base 120 and extends out of the second receiving cavity 122. The movement of the heat sealing plate 130 can be guided by each of the first limiting rods 160, so that the heat sealing plate 130 can move closer to or away from the heat sealing seat 110. The movement of the cutter holder 150 can be guided by each of the second limiting rods 170, so that the cutter holder 150 can move closer to or away from the heat sealing seat 110.

[0038] As a preferred embodiment, please refer to Figure 5 and Figure 6 The first elastic element 210 is a first spring, and each of the first springs is respectively sleeved on each of the first limiting rods 160. The second elastic element 220 is a second spring, and each of the second springs is respectively sleeved on each of the second limiting rods 170. The first limiting rods 160 can limit the first spring to prevent the first spring from being compressed and deformed. The second limiting rods 170 can limit the second spring to prevent the second spring from being compressed and deformed.

[0039] As a preferred embodiment, please refer to Figure 5 and Figure 6 There are two transmission components 300, which are respectively disposed above and below the tool holder 150. One end of each transmission component 300 is connected to the tool holder 150, and the other end of each transmission component 300 is connected to the corresponding heat sealing plate 130. This converts the synchronous reciprocating movement of the two heat sealing plates 130 in the horizontal direction into the opposite movement of the tool holder 150 in the horizontal direction. By using the two transmission components 300, the movement of the two heat sealing plates 130 can be converted into the movement of the tool holder 150, thereby improving the transmission effect.

[0040] As a preferred embodiment, please refer to Figure 5 and Figure 6 The heat-sealing plate 130 has a first ramp 131 on the side away from the heat-sealing seat 110. The cutter holder 150 has second ramps 151 at both its top and bottom. The first ramp 131 on the heat-sealing plate 130 above the cutter holder 150 has an inclination direction opposite to the second ramp 151 at the top of the cutter holder 150. The first ramp 131 on the heat-sealing plate 130 below the cutter holder 150 has an inclination direction opposite to the second ramp 151 at the bottom of the cutter holder 150. The support base 120 also has a guide channel 123. The guide channel 123 extends vertically and connects the two first receiving cavities 121 and the second receiving cavity 122. The transmission assembly 300 is a push block 310. The top of the push block 310 located above the tool holder 150 slides against the corresponding first ramp 131, and its bottom slides against the corresponding second ramp 151. The bottom of the push block 310 located below the tool holder 150 slides against the corresponding first ramp 131, and its top slides against the corresponding second ramp 151. When the heat sealing seat 110 and the support... When the seats 120 approach each other, the two heat-sealing plates 130 are pre-aggregated against the heat-sealing seat 110 on the side closest to the heat-sealing seat 110. When the side of the two heat-sealing plates 130 closest to the heat-sealing seat 110 is pushed inward by the heat-sealing seat 110, it can move into the corresponding first receiving cavity 121. The pushing block 310 moves towards the knife holder 150 due to the pushing action of the first ramp 131, and through the pushing action of the second ramp 151, the knife holder 150 is pushed from the side of the heat-sealing seat 110 into the second receiving cavity 121. When the heat-sealing seat 110 and the support seat 120 move away from each other, the side of the two heat-sealing plates 130 closest to the heat-sealing seat 110 is no longer subjected to the inward pushing force exerted on them by the heat-sealing seat 110. Each of the first elastic elements 210 releases compressive elastic potential energy, pushing the side of the two heat-sealing plates 130 closest to the heat-sealing seat 110 out of the corresponding two first receiving cavities 121. Each of the second elastic elements 220 releases tensile elastic potential energy, pulling the side of the cutter 140 closest to the heat-sealing seat 110 into the second receiving cavity 122.

[0041] As a preferred embodiment, please refer to Figure 1 and Figure 2The packaging bag horizontal sealing mechanism further includes a drive component 400, which is connected to both the heat sealing seat 110 and the support seat 120. The drive component 400 is used to drive the heat sealing seat 110 and the support seat 120 to move closer to each other or further away from each other in the horizontal direction. By operating the drive component 400, the drive component 400 can drive the heat sealing seat 110 and the support seat 120 to move closer to each other or further away from each other in the horizontal direction.

[0042] As a preferred embodiment, please refer to Figure 1 and Figure 2 The packaging bag horizontal sealing mechanism further includes a bracket 500. The heat sealing seat 110 and the support seat 120 are slidably connected to the bracket 500. The bracket 500 can support and guide the heat sealing seat 110 and the support seat 120.

[0043] As a preferred embodiment, please refer to Figure 1 and Figure 2 The bracket 500 includes an outer frame 510 and two guide rods 520. The two guide rods 520 are arranged in parallel on the same horizontal plane and are both located within the space enclosed by the outer frame 510. Both ends of the two guide rods 520 are fixedly connected to the outer frame 510. The two ends of the heat-sealing seat 110 and the support seat 120 are respectively slidably sleeved on the two guide rods 520. The movement of the heat-sealing seat 110 and the support seat 120 can be guided by the two guide rods 520.

[0044] As a preferred embodiment, please refer to Figure 1 and Figure 2The driving assembly 400 includes a telescopic driving member 410 and two transmission members 420. The telescopic driving member 410 is fixedly connected to the outer frame 510, and its output end is fixedly connected to the support base 120, driving the support base 120 to reciprocate linearly in the horizontal direction. The two transmission members 420 are arranged opposite to each other on both sides of the heat-sealing base 110 and the support base 120, and are both located within the space enclosed by the outer frame 510. The two ends of the transmission members 420 are respectively connected to the support base 120 and the heat-sealing base 110 to convert the linear movement of the support base 120 in the horizontal direction into the reverse linear movement of the heat-sealing base 110 in the horizontal direction. By manipulating the telescopic driving member 410, the output end of the telescopic driving member 410 extends, driving the support base 120 to gradually approach the heat-sealing base 110. Since the two transmission members 420 can convert the linear movement of the support base 120 in the horizontal direction into the reciprocating linear movement of the heat-sealing base 110, the transmission members 420 can drive the support base 120 to gradually approach the heat-sealing base 110. The heat-sealing seat 110 moves in the opposite direction in the horizontal direction, so the heat-sealing seat 110 gradually moves closer to the support seat 120. When it is necessary to separate the heat-sealing seat 110 from the support seat 120, the output end of the telescopic drive 410 is shortened by manipulating the telescopic drive 410, which can drive the support seat 120 to gradually move away from the heat-sealing seat 110. Since the two transmission members 420 can convert the linear movement of the support seat 120 in the horizontal direction into the opposite linear movement of the heat-sealing seat 110 in the horizontal direction, the heat-sealing seat 110 also gradually moves away from the support seat 120. In other embodiments, the two telescopic drive members 410 can also be used to drive the support seat 120 and the heat-sealing seat 110 to move closer to each other or further away from each other. In other embodiments, the telescopic drive member 410 can be directly connected to the support seat 120 by a suitable type of cylinder, or it can be connected to the support seat 120 through a transmission mechanism such as a gear set or a pulley set.

[0045] As a preferred embodiment, please refer to Figure 1 and Figure 2The transmission component 420 includes a turntable 421 and two connecting rods 422. The turntable 421 is rotatably connected to the outer frame 510. One end of each connecting rod 422 is hinged to the turntable 421, and the other end of each connecting rod 422 is hinged to the corresponding support base 120 and heat-sealing base 110, respectively. When the telescopic drive component 410 drives the support base 120 to gradually approach the heat-sealing base 110, the connecting rods 422 connected to the support base 120 will gradually approach the heat-sealing base, thereby pushing the turntable 421 to rotate forward and driving the connecting rods 422 to rotate forward. As the heat-sealing seat 110 is connected to the connecting rod 422, the connecting rod 422 gradually moves closer to the support seat 120, thereby causing the heat-sealing seat 110 to gradually move closer to the support seat 120. When the telescopic drive member 410 drives the support seat 120 to gradually move away from the heat-sealing seat 110, the connecting rod 422 connected to the support seat 120 will gradually move away from the heat-sealing seat, thereby pushing the turntable 421 to rotate in the opposite direction, and causing the connecting rod 422 connected to the heat-sealing seat 110 to gradually move away from the support seat 120, thereby causing the heat-sealing seat 110 to gradually move away from the support seat 120.

[0046] To better understand this utility model, the following is combined with... Figure 1 - Figure 7 The working principle of the technical solution of this utility model will be described in detail below:

[0047] In use, this horizontal sealing mechanism is installed directly below the film-pulling cylinder of the film-pulling assembly of the packaging machine. The packaging bag passes through the gap between the heat-sealing seat 110 and the support seat 120 from top to bottom. By operating the telescopic drive member 410, the output end of the telescopic drive member 410 extends, which can drive the support seat 120 to gradually approach the heat-sealing seat 110. Since the two transmission members 420 can convert the linear movement of the support seat 120 in the horizontal direction into the opposite linear movement of the heat-sealing seat 110 in the horizontal direction, the heat-sealing seat 110 also gradually approaches the support seat 120. The two heat-sealing plates 130 are pre-contacted with the heat-sealing seat 110 on the side closest to the heat-sealing seat 110. When the side of the heat-sealing plate 130 closest to the heat-sealing seat 110 is pushed inward by the heat-sealing seat 110, it can move into the corresponding first receiving cavity 121. At this time, each of the first elastic elements 210 is in a compressed state and accumulates compressive elastic potential energy. The pushing block 310 moves towards the knife holder 150 due to the pushing action of the first ramp 131, and through the pushing action of the second ramp 151, the side of the knife holder 150 closest to the heat-sealing seat 110 moves out of the second receiving cavity 122. At this time, each of the second elastic elements 220 is in a stretched state and accumulates tensile elastic potential energy. When the side of the two heat-sealing plates 130 closest to the heat-sealing seat 110 is pressed against the heat-sealing seat 110... When the cutter 110 comes into contact with the heat-sealing seat 110, it works together with the heat-sealing seat 110 to seal the top of packaging bag A (the bottommost packaging bag from bottom to top) and the bottom of packaging bag B (the second to last packaging bag from bottom to top). As the cutter 140 gradually moves out of the second receiving cavity 122 from the side closest to the heat-sealing seat 110, it makes a transverse cut at the connection between packaging bag A and packaging bag B. After the transverse cut is completed, by manipulating the telescopic drive 410, the output end of the telescopic drive 410 shortens, which can drive the support seat 120 to gradually move away from the heat-sealing seat 110. Since the two transmission components 420 can convert the linear movement of the support seat 120 in the horizontal direction into the horizontal movement of the heat-sealing seat 110... As the heat-sealing seat 110 moves away from the support seat 120, the two heat-sealing plates 130 near the heat-sealing seat 110 are no longer subjected to the inward pushing force exerted by the heat-sealing seat 110. Each of the first elastic elements 210 releases compressive elastic potential energy, pushing the two heat-sealing plates 130 near the heat-sealing seat 110 out of the corresponding two first receiving cavities 121. Each of the second elastic elements 220 releases tensile elastic potential energy, pulling the cutter 140 near the heat-sealing seat 110 into the second receiving cavity 122. In this transverse sealing mechanism, the movement of the heat-sealing plate 130 can be converted into the reverse movement of the cutter 140 through the transmission assembly 300.After the heat-sealing plate 130 and the heat-sealing seat 110 work together to seal the packaging bag, the cutter 140 can make a transverse cut at the junction of the two packaging bags. Only one driver is needed to move the heat-sealing seat 110 and the support seat 120 closer together or further apart; no additional driver is required to move the cutter 140. This ensures that the packaging bag can be smoothly cut after sealing, maintaining the timeliness of the heat-sealing and cutting actions and avoiding delays in cutting after heat sealing.

[0048] The horizontal sealing mechanism for packaging bags provided by this utility model has the following beneficial effects:

[0049] (1) When the telescopic drive 410 drives the support seat 120 to gradually approach the heat sealing seat 110, the connecting rod 422 connected to the support seat 120 will gradually approach the heat sealing seat, thereby pushing the turntable 421 to rotate in the forward direction, and driving the connecting rod 422 connected to the heat sealing seat 110 to gradually approach the support seat 120, thereby making the heat sealing seat 110 gradually approach the support seat 120. When the telescopic drive 410 drives the support seat 120 to gradually move away from the heat sealing seat 110, the connecting rod 422 connected to the support seat 120 will gradually move away from the heat sealing seat, thereby pushing the turntable 421 to rotate in the reverse direction, and driving the connecting rod 422 connected to the heat sealing seat 110 to gradually move away from the support seat 120, thereby making the heat sealing seat 110 gradually move away from the support seat 120, thus realizing the transmission function.

[0050] (2) When the two heat-sealing plates 130 are close to the heat-sealing seat 110, they can move into the corresponding first accommodating cavity 121 when the heat-sealing seat 110 pushes them inward. The push block 310 moves towards the knife holder 150 due to the pushing action of the first ramp 131, and the push action of the second ramp 151 causes the knife holder 150 to move out of the second accommodating cavity 122 from the side close to the heat-sealing seat 110, thereby realizing the transmission function.

[0051] (3) This horizontal sealing mechanism can convert the movement of the heat sealing plate 130 into the reverse movement of the cutter 140 through the transmission component 300. After the heat sealing plate 130 and the heat sealing seat 110 work together to seal the packaging bag, the cutter 140 can make a horizontal cut at the connection between the two packaging bags. Only one driver is needed to drive the heat sealing seat 110 and the support seat 120 to move closer to each other or further away from each other. No additional driver is needed to drive the movement of the cutter 140. This ensures that the packaging bag can be smoothly cut after being sealed, maintains the timeliness of heat sealing and cutting actions, and avoids the situation of delayed cutting after heat sealing.

[0052] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A horizontal sealing mechanism for packaging bags, characterized in that, include: A horizontal sealing assembly includes a heat sealing seat, a support seat, two heat sealing plates and a cutter. The heat sealing seat and the support seat are spaced apart and can be close to each other or far apart. The two heat sealing plates are arranged vertically opposite each other and spaced apart, and are both slidably connected to the support seat. The cutter is disposed between the two heat sealing plates and is slidably connected to the support seat. An elastic component is connected to the two heat-sealing plates or the cutter, such that the sides of the two heat-sealing plates closest to the heat-sealing seat are located outside the support base, and the side of the cutter closest to the heat-sealing seat is located inside the support base; The transmission assembly is connected to both heat-sealing plates and the cutter to convert the synchronous reciprocating movement of the two heat-sealing plates in the horizontal direction into the reverse movement of the cutter in the horizontal direction.

2. The packaging bag horizontal sealing mechanism according to claim 1, characterized in that, The heat-sealing seat and the support seat are located in the same horizontal plane, and the gap between the heat-sealing seat and the support seat is used to allow the packaging bag to pass through from top to bottom.

3. The packaging bag horizontal sealing mechanism according to claim 1, characterized in that, The support base has two first accommodating cavities and a second accommodating cavity. The second accommodating cavity is located between the two first accommodating cavities. The side wall of the first accommodating cavity near the heat sealing seat and the side wall of the second accommodating cavity near the heat sealing seat are both open. The two heat sealing plates are slidably disposed in the corresponding two first accommodating cavities, and the cutter is slidably disposed in the second accommodating cavity.

4. The packaging bag horizontal sealing mechanism according to claim 3, characterized in that, The elastic component includes a plurality of first elastic elements and a plurality of second elastic elements. Each of the first elastic elements is disposed in two corresponding first accommodating cavities. One end of the first elastic element is connected to the heat-sealing plate, and the other end of the first elastic element is connected to the support base, so that the side of the heat-sealing plate near the heat-sealing base is located outside the first accommodating cavity. Each of the second elastic elements is disposed in the second accommodating cavity. One end of the second elastic element is connected to the cutter, and the other end of the second elastic element is connected to the support base, so that the side of the cutter near the heat-sealing base is located inside the second accommodating cavity.

5. The packaging bag horizontal sealing mechanism according to claim 4, characterized in that, The horizontal sealing assembly also includes a blade holder, which is slidably disposed in the second accommodating cavity. The side of the cutter away from the heat sealing seat is fixedly connected to the blade holder, and one end of the second elastic member is connected to the blade holder.

6. The packaging bag horizontal sealing mechanism according to claim 5, characterized in that, The horizontal sealing assembly further includes multiple first limiting rods and multiple second limiting rods. Each first limiting rod is horizontally arranged and extends along the moving direction of the heat sealing plate. One end of each first limiting rod is fixedly connected to the heat sealing plate, and the other end of each first limiting rod slides through the support base and extends out of the first receiving cavity. Each second limiting rod is horizontally arranged and extends along the moving direction of the cutter. One end of each second limiting rod is fixedly connected to the cutter holder, and the other end of each second limiting rod slides through the support base and extends out of the second receiving cavity.

7. The packaging bag horizontal sealing mechanism according to claim 5, characterized in that, There are two transmission components, which are respectively disposed above and below the tool holder. One end of each transmission component is connected to the tool holder, and the other end of each transmission component is connected to the corresponding heat sealing plate, so as to convert the synchronous reciprocating movement of the two heat sealing plates in the horizontal direction into the reverse movement of the tool holder in the horizontal direction.

8. The packaging bag horizontal sealing mechanism according to claim 7, characterized in that, The heat-sealing plate has a first slope on the side away from the heat-sealing seat. The top and bottom of the cutter holder both have second slopes. The first slope on the heat-sealing plate above the cutter holder has an inclination direction opposite to that of the second slope at the top of the cutter holder. The first slope on the heat-sealing plate below the cutter holder has an inclination direction opposite to that of the second slope at the bottom of the cutter holder. The support seat also has a guide channel that extends vertically and connects the two first accommodating cavities and the second accommodating cavity. The transmission component is a push block. The top of the push block above the cutter holder slides against the corresponding first slope, and its bottom slides against the corresponding second slope. The bottom of the push block below the cutter holder slides against the corresponding first slope, and its top slides against the corresponding second slope.

9. The packaging bag horizontal sealing mechanism according to claim 2, characterized in that, It also includes a drive component, which is connected to both the heat-sealing seat and the support seat, and is used to drive the heat-sealing seat and the support seat to move closer to each other or further apart in the horizontal direction.

10. The packaging bag horizontal sealing mechanism according to claim 2, characterized in that, It also includes a bracket, and the heat-sealing seat and the support seat are both slidably connected to the bracket.

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