A packaging bag hot-pressing edge sealing device

Abstract

The utility model relates to a kind of packaging bag hot-pressing edge sealing device, comprising: fixed seat and moving seat, fixed seat and moving seat are connected by guiding mechanism, guiding mechanism is connected with driving mechanism, and driving mechanism is used to drive moving seat to approach or away from fixed seat along guiding mechanism;First heating block is installed on fixed seat, and first heating block is connected with heat-conducting pad block;Second heating block is installed on moving seat, and second heating block is connected with heat-conducting mounting block, and multiple heat-conducting pressing blocks are slidably installed on heat-conducting mounting block, and heat-conducting pressing block is oppositely arranged with heat-conducting pad block;The opposite sides of moving seat are also provided with coiled material storage mechanism, and coiled material storage mechanism is used to transport or recycle heat-insulating coiled material, and make heat-insulating coiled material pass between heat-conducting pressing block and heat-conducting pad block.The utility model is by being set up the heat-insulating coiled material that can transport and recycle, so that it is always spaced between heat-conducting pressing block and packaging bag, prevent packaging material in molten state from adhering on heating component.

Description

Technical Field

[0001] This utility model relates to the field of hot-press sealing devices for packaging bags, and more specifically, to a hot-press sealing device for packaging bags. Background Technology

[0002] In the packaging industry, heat sealing of packaging bags is a crucial process, as its quality directly affects the bag's airtightness, durability, and the preservation of the product inside. In traditional heat sealing processes, molten packaging material easily adheres to the high-temperature heating plate. This not only contaminates the next bag to be sealed, resulting in defects in the sealing appearance, but also requires operators to frequently stop the machine to clean the heating plate, severely impacting production efficiency and continuity. Utility Model Content

[0003] In view of this, the present invention provides a hot-press sealing device for packaging bags.

[0004] The objective of this utility model is achieved through the following technical solution: A heat-sealing device for packaging bags, comprising: A fixed base and a movable base are connected by a guide mechanism. The guide mechanism is connected to a drive mechanism, which drives the movable base to move closer to or away from the fixed base along the guide mechanism. A first heating block is installed on the fixed base, and a heat-conducting pad is connected to the first heating block. A second heating block is installed on the movable seat. The second heating block is connected to a heat-conducting mounting block. A plurality of heat-conducting pressure blocks are slidably installed on the heat-conducting mounting block. The heat-conducting pressure blocks are arranged opposite to the heat-conducting pad block. The movable seat is also provided with roll material storage mechanisms on opposite sides. The roll material storage mechanisms are used to transport or recycle the heat insulation roll material and to allow the heat insulation roll material to pass between the heat-conducting pressure block and the heat-conducting pad block.

[0005] In the above technical solution, the moving seat is driven by the drive mechanism to move closer to or away from the fixed seat along the guide mechanism, which can precisely control the distance between the first heating block and the second heating block. This allows for precise adjustment of the pressure during the hot-pressing and sealing process of the packaging bag, ensuring stable and reliable sealing quality and effectively avoiding problems such as weak sealing or excessive pressure damage caused by uneven pressure. Secondly, the first heating block is connected to a heat-conducting pad, and the second heating block is connected to a heat-conducting mounting block and a heat-conducting pressure block. This multi-layered heat-conducting structure helps to evenly transfer heat to the sealing area of ​​the packaging bag, ensuring uniform heating and improving the sealing performance.

[0006] Furthermore, by incorporating a conveyable and recyclable insulating roll, which is always positioned between the heat-conducting pressure block and the packaging bag, the insulating roll serves two purposes. Firstly, it acts as a barrier, preventing molten packaging material from adhering to the heating elements and avoiding frequent shutdowns for cleaning due to material adhesion. Secondly, it ensures that the contact surface between the sealing heat-conducting pressure block and the packaging bag is clean each time, thus guaranteeing a clean and aesthetically pleasing sealing appearance and enabling continuous and efficient production.

[0007] Optionally, in one possible implementation, the guiding mechanism includes a guide rod and a first elastic element and a second elastic element sleeved on the guide rod. The guide rod passes through the fixed seat and the movable seat. The upper end of the guide rod is provided with a limiting block, and the lower end is connected to the driving mechanism. The first elastic element is located between the limiting block and the movable seat, and the second elastic element is located between the fixed seat and the movable seat.

[0008] In the above technical solution, the rigid driving force of the drive mechanism is converted into flexible pressure on the moving seat through the combination of the first and second elastic elements. When the moving seat drives the heat-conducting pressure block to contact the packaging bag, the second elastic element acts as a buffer, avoiding rigid impact and preventing damage to the thin and brittle packaging material due to instantaneous overpressure. The first elastic element can automatically compensate for height changes caused by uneven packaging bag thickness, multiple layers, or the presence of small foreign objects.

[0009] Optionally, in one possible implementation, the guide rod is further fitted with a spring force adjustment mechanism, which is located between the movable seat and the second elastic element and is used to adjust the spring force of the second elastic element.

[0010] In the above technical solution, the elastic adjustment mechanism can linearly and precisely adjust the pressure value provided by the elastic element during the sealing process by adjusting the pre-compression amount. This allows operators to set the most suitable heat-sealing pressure according to different packaging materials, thereby ensuring the sealing strength while avoiding material thinning, burning through, or "over-sealing" due to excessive pressure.

[0011] Optionally, in one possible implementation, the adjusting mechanism includes a first limiting ring, a sleeve, and a second limiting ring. The sleeve is sleeved on the guide rod, the first limiting ring is fixed to the upper end of the sleeve and abuts against the movable seat, and the second limiting ring is threaded to the outer periphery of the sleeve and cannot abut against the second elastic element.

[0012] In the above technical solution, the axial position of the spring on the sleeve can be continuously and linearly changed by rotating the second limiting ring, which is threadedly connected to the sleeve. This allows for precise adjustment of the spring's pre-compression, achieving very fine pressure fine-tuning. Simultaneously, the threaded connection has excellent self-locking characteristics, preventing fluctuations in sealing quality caused by loosening of the adjustment mechanism and ensuring consistency in the production process.

[0013] Alternatively, in one possible implementation, both the first elastic element and the second elastic element are metal springs.

[0014] In the above technical solution, the metal spring has excellent elasticity and can undergo significant deformation when subjected to large external forces. When the external force is removed, it can quickly return to its original shape and size, which can ensure the continuity and stability of the device operation.

[0015] Optionally, in one possible implementation, the heat-conducting pressure block has two parallel and spaced pressure strips on the side opposite to the heat-conducting pad block, and the heat-conducting pressure block and the heat-conducting mounting block are connected by a dovetail groove structure.

[0016] In the above technical solution, the two parallel and spaced pressure strips can distribute the pressure more evenly over the sealing area of ​​the packaging bag during the hot pressing process. Compared with a single large-area pressure block, this distribution method can avoid uneven sealing caused by excessive or insufficient local pressure, allowing the material at the sealing edge to fuse more fully and improving the sealing performance and firmness. The dovetail groove structure has a unique wedge design. When the heat-conducting pressure block and the heat-conducting mounting block are connected through the dovetail groove, this wedge structure can generate a self-locking effect, making the two components tightly joined.

[0017] Optionally, in one possible implementation, the opposite sides of the thermal pad are detachably fixed to the thermal mounting block by limiting plates, and the limiting plates are fixed to the thermal mounting block by a number of bolts.

[0018] In the above technical solution, the detachable design of the limiting plate makes the installation process of the thermal pad more convenient. When assembling the equipment, the operator can first place the thermal pad in the appropriate position on the thermal mounting block, and then quickly complete the installation of the thermal pad by installing the limiting plate and fixing it with bolts.

[0019] Alternatively, in one possible implementation, the outer periphery of the thermal pad is also covered with a thermal insulation fabric layer.

[0020] In the above technical solution, the heat-insulating fabric layer has excellent heat insulation performance, which can effectively prevent heat from the heat-conducting pad from dissipating to the surrounding environment. It also avoids direct contact between the packaging bag and the heat-conducting pad, thus preventing damage to the packaging bag from the heat-conducting pad to a certain extent.

[0021] Optionally, in one possible implementation, the roll storage mechanism includes two positioning blocks spaced apart on the movable seat, and a rotating rod rotatably mounted on the two positioning blocks, wherein one of the roll storage mechanisms is used for unwinding and the other is used for rewinding.

[0022] In the above technical solution, two positioning blocks are spaced apart on the movable seat, with the rotating rod rotatably mounted between them. This structural design is compact and occupies little space. Within a limited equipment space, it can efficiently complete the storage and unwinding functions of the roll material, making it particularly suitable for space-constrained production environments and improving the space utilization of the work area. Furthermore, it clearly distinguishes between one roll material storage mechanism for unwinding and another for rewinding, avoiding mutual interference between the unwinding and rewinding processes.

[0023] Alternatively, in one possible implementation, one end of the rotating rod passes through the positioning block, and the end of the rotating rod passing through the positioning block is provided with a handle.

[0024] In the above technical solution, the handle provides an easy gripping and force application area for the operator. The operator can easily rotate the rotating rod by simply holding the handle, thereby enabling the roll material to be conveyed quickly. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the overall structure of one embodiment.

[0027] Figure 2 for Figure 1 Enlarged view of part A in the middle.

[0028] Reference numerals in the attached drawings: 1-Fixed seat; 2-Moving seat; 3-Guiding mechanism; 31-Guiding rod; 311-Limiting block; 32-First elastic element; 33-Second elastic element; 4-Elasticity adjustment mechanism; 41-Limiting ring; 42-Sleeve; 43-Second limiting ring; 5-First heating block; 51-Heat-conducting pad block; 6-Second heating block; 61-Heat-conducting mounting block; 62-Heat-conducting pressure block; 621-Pressure strip; 7-Roll material storage mechanism; 71-Positioning block; 72-Rotating rod; 721-Handle; 8-Limiting plate; 81-Bolt. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0031] Please refer to Figure 1 This embodiment provides a hot-press sealing device for packaging bags, including: a fixed base 1 and a movable base 2. The fixed base 1 and the movable base 2 are connected by a guide mechanism 3. The guide mechanism 3 is connected to a driving mechanism, which drives the movable base 2 to move closer to or away from the fixed base 1 along the guide mechanism 3. A first heating block 5 is installed on the fixed base 1, and the first heating block 5 is connected to a heat-conducting pad block 51. A second heating block 6 is installed on the movable base 2, and the second heating block 6 is connected to a heat-conducting mounting block 61. A plurality of heat-conducting pressure blocks 62 are slidably installed on the heat-conducting mounting block 61, and the heat-conducting pressure blocks 62 are arranged opposite to the heat-conducting pad block 51. A roll material storage mechanism 7 is also provided on opposite sides of the movable base 2. The roll material storage mechanism 7 is used to transport or recycle the heat insulation roll material and to allow the heat insulation roll material to pass between the heat-conducting pressure blocks 62 and the heat-conducting pad block 51.

[0032] In this embodiment, the moving seat 2 is driven by a drive mechanism to move closer to or further away from the fixed seat 1 along the guide mechanism 3, which can precisely control the distance between the first heating block 5 and the second heating block 6. This allows for precise adjustment of the pressure during the hot-pressing and sealing process of the packaging bag, ensuring stable and reliable sealing quality and effectively avoiding problems such as weak sealing or excessive pressure damage caused by uneven pressure. Furthermore, the first heating block 5 is connected to the heat-conducting pad 51, and the second heating block 6 is connected to the heat-conducting mounting block 61 and the heat-conducting pressure block 62. This multi-layered heat-conducting structure helps to evenly transfer heat to the sealing area of ​​the packaging bag, ensuring uniform heating and improving the sealing performance.

[0033] Furthermore, by incorporating a conveyable and recyclable insulating roll, which is always positioned between the heat-conducting pressure block 62 and the packaging bag, the insulating roll serves two purposes. Firstly, it acts as an insulator, preventing molten packaging material from adhering to the heating elements and avoiding frequent shutdowns for cleaning due to material adhesion. Secondly, it ensures that the contact surface between the heat-conducting pressure block 62 and the packaging bag is clean each time, thus guaranteeing a clean and aesthetically pleasing seal and enabling continuous and efficient production.

[0034] In this embodiment, the guiding mechanism 3 includes a guide rod 31 and a first elastic element 32 and a second elastic element 33 sleeved on the guide rod 31. The guide rod 31 passes through the fixed seat 1 and the movable seat 2. The upper end of the guide rod 31 is provided with a limiting block 311, and the lower end is connected to the driving mechanism. The first elastic element 32 is located between the limiting block 311 and the movable seat 2, and the second elastic element 33 is located between the fixed seat 1 and the movable seat 2. The driving mechanism can be a linear driving mechanism such as a cylinder or an electric actuator, or a cam mechanism to realize the reciprocating motion of the movable seat 2. These are all existing conventional technologies, and their specific structures will not be described in detail here.

[0035] The combination of the first elastic element 32 and the second elastic element 33 transforms the rigid driving force of the drive mechanism into flexible pressure on the moving seat 2. When the moving seat 2 drives the heat-conducting pressure block 62 to contact the packaging bag, the second elastic element 33 acts as a buffer, avoiding rigid impact and preventing damage to the thin and brittle packaging material due to instantaneous overpressure. The first elastic element 32 can automatically compensate for height changes caused by uneven packaging bag thickness, multiple layers, or the presence of small foreign objects.

[0036] In this embodiment, a spring force adjustment mechanism 4 is also sleeved on the guide rod 31. The spring force adjustment mechanism 4 is located between the movable seat 2 and the second elastic member 33 and is used to adjust the spring force of the second elastic member 33.

[0037] Different materials require different pressures during heat sealing of packaging bags. For example, thicker plastic packaging bags require greater pressure to achieve a good sealing effect, while thinner paper packaging bags cannot withstand excessive pressure, otherwise they will be easily crushed. The elastic adjustment mechanism 4 can adjust the elasticity of the second elastic element 33, thereby changing the pressure of the moving seat 2 on the fixed seat 1 during heat sealing, enabling the equipment to adapt to the heat sealing requirements of packaging bags of various materials, thus broadening the application range of the equipment.

[0038] Furthermore, the elastic adjustment mechanism 4 can linearly and precisely adjust the pressure value provided by the elastic element during the sealing process by adjusting the pre-compression amount. This allows operators to set the most suitable heat-sealing pressure according to different packaging materials, thereby ensuring the sealing strength while avoiding material thinning, burning through, or "over-sealing" due to excessive pressure.

[0039] Specifically, the adjusting mechanism includes a first limiting ring 41, a sleeve 42, and a second limiting ring 4341. The sleeve 42 is sleeved on the guide rod 31. The first limiting ring 41 is fixed to the upper end of the sleeve 42 and abuts against the moving seat 2. The second limiting ring 4341 is threaded to the outer periphery of the sleeve 42 and cannot abut against the second elastic element 33. The first limiting ring 41 is fixed to the top of the sleeve 42 and can be an integral structure with the sleeve 42. Its function is to reduce the pressure applied by the sleeve 42 to the moving seat 2. The outer periphery of the sleeve 42 is provided with external threads, and the inner side of the second limiting ring 4341 is provided with internal threads that match the external threads.

[0040] By rotating the second limiting ring 4341, which is threadedly connected to the sleeve 42, its axial position on the sleeve 42 can be changed continuously and linearly. This allows for precise adjustment of the spring pre-compression, achieving very fine pressure fine-tuning. Simultaneously, the threaded connection has excellent self-locking characteristics, preventing fluctuations in sealing quality caused by loosening of the adjustment mechanism and ensuring consistency in the production process.

[0041] It should be noted that both the first elastic element 32 and the second elastic element 33 are metal springs. Metal springs have excellent elasticity and can undergo significant deformation when subjected to large external forces. When the external force is removed, they can quickly return to their original shape and size, which can ensure the continuity and stability of the device operation.

[0042] In this embodiment, the heat-conducting pressure block 62 has two parallel and spaced pressure strips 621 on the side opposite to the heat-conducting pad block 51. The heat-conducting pressure block 62 and the heat-conducting mounting block 61 are connected by a dovetail groove structure. Packaging bags are typically produced as a single sheet, meaning that packaging strips are processed simultaneously on a single sheet of film before being cut. Before cutting, heat sealing is required. The two pressure strips 621 allow for simultaneous heat sealing of two adjacent packaging bags, thereby improving efficiency.

[0043] Furthermore, the two parallel and spaced pressure strips 621 can distribute pressure more evenly over the sealing area of ​​the packaging bag during the hot pressing process. Compared to a single large-area pressure block, this distribution method can avoid uneven sealing caused by excessive or insufficient local pressure, allowing the material at the sealing edge to fuse more fully and improving the sealing performance and strength. The dovetail groove structure has a unique wedge design. When the heat-conducting pressure block 62 and the heat-conducting mounting block 61 are connected through the dovetail groove, this wedge structure can generate a self-locking effect, making the two components tightly joined.

[0044] In this embodiment, the opposite sides of the thermal pad 51 are detachably fixed to the thermal mounting block 61 by the limiting plate 8, and the limiting plate 8 is fixed to the thermal mounting block 61 by a number of bolts 81.

[0045] The detachable positioning plate design makes the installation process of the thermal pad 51 easier. When assembling the equipment, the operator can first place the thermal pad 51 in the appropriate position on the thermal mounting block 61, and then quickly complete the installation of the thermal pad 51 by installing the limiting plate 8 and fixing it with bolts 81.

[0046] It should be noted that the outer periphery of the thermal pad 51 is also covered with a heat-insulating fabric layer. This heat-insulating fabric layer has excellent heat insulation properties, effectively preventing heat loss from the thermal pad 51 to the surrounding environment. It also prevents direct contact between the packaging bag and the thermal pad 51, thus mitigating the risk of damage to the packaging bag.

[0047] In this embodiment, the roll material storage mechanism 7 includes two positioning blocks 71 spaced apart on the movable base 2, and a rotating rod 72 rotatably mounted on the two positioning blocks 71. One roll material storage mechanism 7 is used for unwinding, and the other roll material storage mechanism 7 is used for winding. After multiple hot pressings, the heat insulation roll will be consumed to a certain extent by the heat-conducting pressing block 62. Therefore, the heat insulation roll can be replaced by rotating the rotating rod 72.

[0048] Two positioning blocks 71 are spaced apart on the movable base 2, with the rotating rod 72 rotatably mounted between them. This compact design saves space. Within limited equipment space, it efficiently completes the storage and unwinding functions of the roll material, making it particularly suitable for space-constrained production environments and improving the space utilization of the work area. Furthermore, it clearly distinguishes between one roll material storage mechanism 7 for unwinding and another for rewinding, avoiding mutual interference between the unwinding and rewinding processes.

[0049] One end of the rotating rod 72 passes through the positioning block 71, and a handle 721 is provided at the end of the rotating rod 72 that passes through the positioning block 71. The handle 721 is provided to provide the operator with a convenient part to grip and apply force. The operator can easily rotate the rotating rod 72 by simply holding the handle 721, thereby enabling the roll material to be fed quickly.

[0050] In the description of this utility model, it should be understood that terms such as "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0051] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0052] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A heat-sealing device for packaging bags, characterized in that, include: A fixed base and a movable base are connected by a guide mechanism. The guide mechanism is connected to a drive mechanism, which drives the movable base to move closer to or away from the fixed base along the guide mechanism. A first heating block is installed on the fixed base, and a heat-conducting pad is connected to the first heating block. A second heating block is installed on the movable seat. The second heating block is connected to a heat-conducting mounting block. A plurality of heat-conducting pressure blocks are slidably installed on the heat-conducting mounting block. The heat-conducting pressure blocks are arranged opposite to the heat-conducting pad block. The movable seat is also provided with roll material storage mechanisms on opposite sides. The roll material storage mechanisms are used to transport or recycle the heat insulation roll material and to allow the heat insulation roll material to pass between the heat-conducting pressure block and the heat-conducting pad block.

2. The packaging bag heat sealing device according to claim 1, characterized in that, The guiding mechanism includes a guide rod and a first elastic element and a second elastic element sleeved on the guide rod. The guide rod passes through the fixed seat and the movable seat. The upper end of the guide rod is provided with a limiting block and the lower end is connected to the driving mechanism. The first elastic element is located between the limiting block and the movable seat, and the second elastic element is located between the fixed seat and the movable seat.

3. The packaging bag heat sealing device according to claim 2, characterized in that, The guide rod is also fitted with an elastic adjustment mechanism, which is located between the movable seat and the second elastic element and is used to adjust the elastic force of the second elastic element.

4. The packaging bag heat sealing device according to claim 3, characterized in that, The adjusting mechanism includes a first limiting ring, a sleeve, and a second limiting ring. The sleeve is sleeved on the guide rod. The first limiting ring is fixed to the upper end of the sleeve and abuts against the movable seat. The second limiting ring is threaded to the outer periphery of the sleeve and cannot abut against the second elastic element.

5. The packaging bag heat sealing device according to claim 2, characterized in that, Both the first elastic element and the second elastic element are metal springs.

6. The packaging bag heat sealing device according to claim 1, characterized in that, The thermally conductive pressure block has two parallel and spaced pressure strips on the side opposite to the thermally conductive pad block. The thermally conductive pressure block and the thermally conductive mounting block are connected by a dovetail groove structure.

7. The packaging bag heat sealing device according to claim 1, characterized in that, The opposite sides of the thermal pad are detachably fixed to the thermal mounting block by limiting plates, and the limiting plates are fixed to the thermal mounting block by several bolts.

8. The packaging bag heat sealing device according to claim 1, characterized in that, The outer periphery of the thermal pad is also covered with a heat-insulating cloth layer.

9. The packaging bag heat sealing device according to claim 1, characterized in that, The roll storage mechanism includes two positioning blocks spaced apart on the movable base, and a rotating rod rotatably mounted on the two positioning blocks. One of the roll storage mechanisms is used for unwinding, and the other is used for winding.

10. The packaging bag heat sealing device according to claim 9, characterized in that, One end of the rotating rod passes through the positioning block, and the end of the rotating rod that passes through the positioning block is provided with a handle.

Images