Packaging bag opening heat sealing mechanism

Abstract

The utility model relates to a packaging bag opening heat-sealing mechanism which is characterized in that a heat-sealing station support is arranged in a heat-sealing frame body, a lower bracket is arranged at the lower end of the heat-sealing station support, a liftable hot-pressing riveting block is arranged in the heat-sealing station support, a hot-pressing steel nail is arranged on the lower side of the hot-pressing riveting block, and a swing arm driving assembly is arranged at the upper end of the heat-sealing frame body. The bag opening input swing arm is driven by a swing arm driving assembly to swing, a bag opening input insertion plate is arranged at the lower end of the bag opening input swing arm, and a packaging bag opening is driven by the bag opening input insertion plate to be folded into a gap between the hot-pressing riveting block and the lower bracket. The bag opening input inserting plate at the lower end of the bag opening input swing arm is used for automatically folding a packaging bag opening into a gap between the hot-pressing riveting block and the lower bracket to form a bag opening folded edge, then a hot-pressing steel nail on the lower side of the hot-pressing riveting block is used for being inserted into the bag opening folded edge to complete heat sealing operation, and the whole sealing process can be automatically completed. And meanwhile, it can be guaranteed that heat sealing of the bag opening is firm and reliable.

Description

Technical Field

[0001] The utility model relates to the field of packaging equipment, and specifically relates to a heat sealing mechanism for the bag mouth of a packaging bag. Background Technique

[0002] In many fields, it is necessary to use packaging bags to package product materials. Among them, how to seal the bag after the packaging bag is filled with materials and weighed is one of the key links in the entire packaging production line. If the bag mouth is not sealed tightly, problems such as material flowing out of the packaging bag during subsequent transportation may occur. The patent CN218617497U discloses a heat sealing device for packaging bags, which includes a support frame, a limiting component, and a hot melt sealing component arranged on the top of the support frame. When the device works, when the packaging bag is transported to the hot melt sealing component, the heating side component remains stationary, and the moving side component extends and moves towards the packaging bag, and presses the sealing part of the packaging bag to contact the heating side component to complete the sealing of the packaging bag. However, this device realizes sealing by melting the bag mouth with the high temperature at the heating plate. If the thickness of the bag mouth is relatively thick or the heating plate does not fit tightly with the bag mouth due to protrusions on the side of the bag mouth, the device is prone to problems such as loose sealing.

[0003] The patent CN216230952U discloses a hemming device for packaging bags. This device uses a hemming wheel to hem the bag body, then uses a pressing wheel to press and form the hemmed part of the bag body, and finally uses a heat sealing head in the heat sealing device to complete the heat sealing of the bag body. However, this device is used for hemming and heat sealing forming treatment of packaging bags to improve strength, and it is not used for sealing the bag mouth.

[0004] The patent CN213139214U discloses a hemming and heat melting sealing device for packaging bags. However, this device is aimed at a woven packaging bag with a high and low mouth, and it realizes sealing by melting the rubber strip. When the device works, it first folds the high mouth edge by 180°, then heats and melts the rubber strip on the high mouth edge, and finally presses both sides of the seal and uses the rubber strip to stick the seal of the packaging bag. Content of the Utility Model

[0005] The purpose of the utility model is to provide a heat sealing mechanism for the bag mouth of a packaging bag, which automatically folds the bag mouth of the packaging bag into the gap between the heat pressing riveting block and the lower support seat by the bag mouth input plug at the lower end of the bag mouth input swing arm to form a bag mouth hem, and then inserts the heat pressing steel nails on the lower side of the heat pressing riveting block into the bag mouth hem to complete the heat sealing operation. The entire sealing process can be completed automatically, and it is not affected by the thickness of the bag mouth, and can ensure firm and reliable heat sealing of the bag mouth.

[0006] The purpose of the utility model is achieved by the following technical solutions:

[0007] A heat-sealing mechanism for the bag mouth of a packaging bag, comprising a heat-sealing frame body, a bag-mouth input swing arm, and a swing-arm driving assembly. Inside the heat-sealing frame body, there is a heat-sealing station support, and a lower support seat is provided at the lower end of the heat-sealing station support. Inside the heat-sealing station support, there is a liftable hot-pressing riveting block, and a hot-pressing steel nail is provided on the lower side of the hot-pressing riveting block. The swing-arm driving assembly is arranged at the upper end of the heat-sealing frame body, and the bag-mouth input swing arm is driven to swing by the swing-arm driving assembly. A bag-mouth input insertion plate is provided at the lower end of the bag-mouth input swing arm, and the bag mouth of the packaging bag is driven by the bag-mouth input insertion plate to be folded into the gap between the hot-pressing riveting block and the lower support seat.

[0008] The swing-arm driving assembly includes a swing-arm driving device, a driving arm, and a driving shaft. At the upper end of the heat-sealing frame body, there are a front support and a rear support. The swing-arm driving device is arranged on the rear support, and the front power shaft at its front end is hinged to the upper end of the driving arm. The two ends of the driving shaft are respectively rotatably installed on the corresponding front supports, and the lower end of the driving arm is connected to the driving shaft. The upper end of the bag-mouth input swing arm is arranged on the driving shaft.

[0009] The lower end of the driving arm is connected to the middle of the driving shaft. The two ends of the driving shaft are respectively connected to the bag-mouth input swing arms on the corresponding sides, and the lower ends of the two bag-mouth input swing arms are connected by a bag-mouth input insertion plate.

[0010] Inside the heat-sealing station support, there is a hot-pressing lifting device, and the hot-pressing riveting block is driven to lift by the hot-pressing lifting device.

[0011] Inside the heat-sealing station support, there is a heat-sealing installation beam, and the hot-pressing lifting device is arranged on the heat-sealing installation beam.

[0012] The lower end of the power shaft of the hot-pressing lifting device is connected to a heat-insulating plate, and the heat-insulating plate is connected to the hot-pressing riveting block through a connecting rod.

[0013] The advantages and positive effects of the present utility model are as follows:

[0014] 1. The present utility model automatically folds the bag mouth of the packaging bag into the gap between the hot-pressing riveting block and the lower support seat by using the bag-mouth input insertion plate at the lower end of the bag-mouth input swing arm to form a bag-mouth hem, and then inserts the hot-pressing steel nail on the lower side of the hot-pressing riveting block into the bag-mouth hem to complete the heat-sealing operation. The entire sealing process is automatically completed, thereby improving the automation level of the equipment.

[0015] 2. The hot press steel nails on the lower side of the hot press riveting block of the present utility model can penetrate through multiple layers of materials forming the bag mouth, so that it is not affected by the thickness of the bag mouth. Moreover, the heat generated by the energized heating of the hot press riveting block will also be conducted to each hot press steel nail, and the position where the hot press steel nail penetrates through the bag mouth will be melted to form a columnar seal. In this way, the present utility model ensures the firm and reliable heat sealing of the bag mouth by the columnar seals with sufficient density formed by each hot press steel nail on the folded edge of the bag mouth.

[0016] 3. The lower end of the power shaft of the hot press lifting device of the present utility model is first connected to a heat insulation plate, and the heat insulation plate is then connected to the hot press riveting block through a connecting rod, which can avoid the temperature of the hot press riveting block being conducted to the hot press lifting device, thereby ensuring the normal operation of the hot press lifting device.

[0017] 4. Each component of the present utility model can be integrated on the upper part of the heat sealing frame body, and the overall structure is compact, without occupying too much installation space. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of the present utility model,

[0019] Figure 2 is Figure 1 the view from direction A in

[0020] Figure 3 is Figure 2 an enlarged schematic diagram of the hot press riveting block in

[0021] Figure 4 is a schematic structural diagram of the packaging bag for an application example of the present utility model.

[0022] Among them, 1 is the bag mouth input swing arm, 101 is the bag mouth input insertion plate, 102 is the limiting element, 2 is the swing arm driving assembly, 201 is the swing arm driving device, 202 is the driving arm, 203 is the rear support, 204 is the installation base, 205 is the front support, 206 is the driving shaft, 207 is the driving bearing seat, 3 is the hot press lifting device, 301 is the heat insulation plate, 302 is the connecting rod, 4 is the hot press riveting block, 401 is the hot press steel nail, 5 is the lower support seat, 6 is the heat sealing frame body, 7 is the heat sealing station support, and 701 is the heat sealing installation beam. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The present utility model will be further described in detail below with reference to the accompanying drawings.

[0024] As shown in Figures 1 to 3As shown in the figure, the utility model includes a heat-sealing frame body 6, a bag mouth input swing arm 1 and a swing arm driving assembly 2. Inside the heat-sealing frame body 6, there is a heat-sealing station support 7. At the lower end of the heat-sealing station support 7, there is a lower support seat 5. Inside the heat-sealing station support 7, there is a liftable hot pressing and riveting block 4. Below the hot pressing and riveting block 4, there is a hot pressing steel nail 401. The swing arm driving assembly 2 is arranged at the upper end of the heat-sealing frame body 6. The bag mouth input swing arm 1 is driven to swing by the swing arm driving assembly 2. At the lower end of the bag mouth input swing arm 1, there is a bag mouth input plug board 101. The bag mouth of the packaging bag is bent through the bag mouth input plug board 101 and enters the gap between the hot pressing and riveting block 4 and the lower support seat 5 to form a bag mouth hem.

[0025] As Figures 1 to 2 shown in the figure, in this embodiment, the swing arm driving assembly 2 includes a swing arm driving device 201, a driving arm 202 and a driving shaft 206. At the upper end of the heat-sealing frame body 6, there is a front support 205 and a rear support 203. The swing arm driving device 201 is arranged on the rear support 203, and the front power shaft at its front end is hinged to the upper end of the driving arm 202. The two ends of the driving shaft 206 are respectively rotatably installed on the corresponding front supports 205. The lower end of the driving arm 202 is connected to the driving shaft 206. The upper end of the bag mouth input swing arm 1 is arranged on the driving shaft 206. When the utility model works, the driving arm 202 is driven to rotate by the swing arm driving device 201, and then drives the driving shaft 206 to rotate. The rotation of the driving shaft 206 drives the bag mouth input swing arm 1 to swing up and down. The swing arm driving device 201 can adopt a linear driving device such as a cylinder, an oil cylinder or an electric push rod according to actual needs.

[0026] As Figure 2 shown in the figure, in this embodiment, at the upper end of the front support 205, there is a driving bearing seat 207. The two ends of the driving shaft 206 are respectively installed in the corresponding driving bearing seats 207.

[0027] As Figures 1 to 2 shown in the figure, in this embodiment, the rear support 203 is vertically arranged on a mounting base 204, and the mounting base 204 is fixed to the upper end of the heat-sealing frame body 6.

[0028] As Figure 2 shown in the figure, in this embodiment, the lower end of the driving arm 202 is connected to the middle of the driving shaft 206. The two ends of the driving shaft 206 are respectively connected to the bag mouth input swing arms 1 on the corresponding sides. The lower ends of the two bag mouth input swing arms 1 are connected by a bag mouth input plug board 101.

[0029] As Figures 2 to 3As shown in the figure, in this embodiment, a hot pressing lifting device 3 is provided inside the hot sealing station bracket 7, and the hot pressing riveting block 4 is driven to lift and lower by the hot pressing lifting device 3. When the hot pressing riveting block 4 descends, it can cooperate with the lower support seat 5 to complete the sealing of the bag mouth of the packaging bag. When sealing, the hot pressing steel nails 401 on the lower side of the hot pressing riveting block 4 are inserted into the folded edge of the bag mouth. The hot pressing steel nails 401 have sufficient length, and they can pass through multiple layers of materials forming the bag mouth, so that they are not affected by the thickness of the bag mouth. In addition, the hot pressing riveting block 4 is electrified to generate heat, and the heat will be conducted to each hot pressing steel nail 401. In this way, the position where the hot pressing steel nails 401 pass through the bag mouth can be melted to form a columnar seal. In this way, the present utility model ensures the firm and reliable hot sealing of the bag mouth by the columnar seals with sufficient density formed by each hot pressing steel nail 401 on the folded edge of the bag mouth. The hot pressing riveting block 401 is a well-known technology in the art. For example, the heating plate in the patent CN218617497U can be referred to, and the heating principles of the two are the same.

[0030] As Figures 2 to 3 shown in the figure, in this embodiment, a hot sealing installation beam 701 is provided inside the hot sealing station bracket 7, and the hot pressing lifting device 3 is arranged on the hot sealing installation beam 701. The hot pressing lifting device 3 can adopt a linear driving device such as a cylinder according to actual needs.

[0031] As Figure 3 shown in the figure, in this embodiment, the lower end of the power shaft of the hot pressing lifting device 3 is first connected to a heat insulation plate 301, and the heat insulation plate 301 is then connected to the hot pressing riveting block 4 through a connecting rod 302. The heat insulation plate 301 can prevent the temperature of the hot pressing riveting block 4 from being conducted to the hot pressing lifting device 3, thereby ensuring the normal operation of the hot pressing lifting device 3.

[0032] In this embodiment, as Figure 1 shown in the figure, the upper end of the bag mouth input swing arm 1 is formed into a bent shape to ensure that when the bag mouth input swing arm 1 falls completely, the folded edge of the bag mouth can completely enter the gap between the hot pressing riveting block 4 and the lower support seat 5. In addition, as Figure 3 shown in the figure, a groove opening is provided at the free end of the bag mouth input plug board 101 to avoid each hot pressing steel nail 401. In this way, when the hot pressing riveting block 4 descends, each hot pressing steel nail 401 is inserted into the folded edge of the bag mouth through the groove opening to complete the hot sealing operation. In addition, the present utility model can be provided with a limiting element 102 at a suitable position on the hot sealing station bracket 7 according to actual needs to limit the downward swing displacement of the corresponding side bag mouth input swing arm 1. The limiting element 102 can adopt a suitable structural form according to actual needs, such as a limiting block, a limiting bolt, a position sensor, etc. The position sensor is a commercially available product.

[0033] The working principle of the present utility model is:

[0034] When the utility model works, the hot press riveting block 4 first rises to a set height to ensure that there is enough space between it and the lower support seat 5 for the bag mouth hem to be inserted. At the same time, the bag mouth input swing arm 1 is in the raised state. When the packaging bag is conveyed through the conveyor belt and enters the set position in the heat sealing frame body 6, the swing arm driving device 201 in the swing arm driving assembly 2 is started, and the bag mouth input swing arm 1 is driven to fall through the driving arm 202 and the driving shaft 206. At this time, the bag mouth input inserting plate 101 at the lower end of the bag mouth input swing arm 1 will drive the bag mouth of the packaging bag to fold into the space between the hot press riveting block 4 and the lower support seat 5 to form a bag mouth hem. Then, the hot press riveting block 4 is driven to descend through the hot press lifting device 3 and cooperates with the lower support seat 5 to clamp the bag mouth hem to complete the heat sealing operation. Among them, the hot press steel nails 401 on the lower side of the hot press riveting block 4 can penetrate through multiple layers of materials forming the bag mouth, so it can be not affected by the thickness of the bag mouth. And the heat generated by the energized heating of the hot press riveting block 4 will also be conducted to each hot press steel nail 401, and the position where the hot press steel nail 401 penetrates through the bag mouth will be melted to form a columnar seal. In this way, the utility model ensures the firm and reliable heat sealing of the bag mouth by the columnar seals with sufficient density formed by each hot press steel nail 401 on the bag mouth hem.

[0035] As Figure 4 shown, in an application example of the utility model, the upper end of the packaging bag 8 targeted has a cylindrical bag mouth 801 with a reduced diameter. During heat sealing, the bag mouth 801 is bent and enters the space between the hot press riveting block 4 and the lower support seat 5 through the action of the bag mouth input inserting plate 101, and then the hot press riveting block 4 descends to complete the heat sealing of the bag mouth 801. Therefore, as Figure 2 shown, the widths of components such as the heat sealing station support 7, the hot press riveting block 4, and the lower support seat 5 in this application example are all set in cooperation with the bag mouth 801. The utility model can also be used for the bag mouth sealing operation of conventional packaging bags. At this time, the widths of components such as the heat sealing station support 7, the hot press riveting block 4, and the lower support seat 5 are set in cooperation with the conventional bag mouth.

Claims

1. A packaging bag heat sealing mechanism, characterized in that: The invention comprises a heat sealing frame (6), a bag mouth input swing arm (1) and a swing arm driving assembly (2), wherein a heat sealing station bracket (7) is arranged inside the heat sealing frame (6), and a lower supporting seat (5) is arranged at the lower end of the heat sealing station bracket (7), a liftable hot-pressing riveting block (4) is arranged inside the heat sealing station bracket (7), and a hot-pressing steel nail (401) is arranged at the lower side of the hot-pressing riveting block (4), the swing arm driving assembly (2) is arranged at the upper end of the heat sealing frame (6), and the bag mouth input swing arm (1) is driven to swing by the swing arm driving assembly (2), a bag mouth input plug plate (101) is arranged at the lower end of the bag mouth input swing arm (1), and the bag mouth of the packaging bag is driven by the bag mouth input plug plate (101) to be folded into the gap between the hot-pressing riveting block (4) and the lower supporting seat (5).

2. The packaging bag mouth heat sealing mechanism according to claim 1, characterized in that: The swing arm driving assembly (2) comprises a swing arm driving device (201), a driving arm (202) and a driving shaft (206), wherein the upper end of the heat sealing frame (6) is provided with a front support (205) and a rear support (203), the swing arm driving device (201) is arranged on the rear support (203) and the front end power shaft is hinged to the upper end of the driving arm (202), the two ends of the driving shaft (206) are respectively rotatably mounted on the front support (205) on the corresponding side, and the lower end of the driving arm (202) is connected to the driving shaft (206), and the upper end of the bag mouth input swing arm (1) is arranged on the driving shaft (206).

3. The packaging bag mouth heat sealing mechanism according to claim 2, characterized in that: The lower end of the driving arm (202) is connected to the middle of the driving shaft (206), and the two ends of the driving shaft (206) are respectively connected to the bag mouth input swing arms (1) on the corresponding sides, and the lower ends of the bag mouth input swing arms (1) on both sides are connected via a bag mouth input plug plate (101).

4. The packaging bag mouth heat sealing mechanism according to claim 1, characterized in that: A hot-pressing lifting device (3) is provided inside the heat-sealing station bracket (7), and the hot-pressing riveting block (4) is driven to rise and fall by the hot-pressing lifting device (3).

5. The packaging bag mouth heat sealing mechanism according to claim 4, characterized in that: A heat sealing installation beam (701) is provided inside the heat sealing station bracket (7), and the hot pressure lifting device (3) is arranged on the heat sealing installation beam (701).

6. The packaging bag mouth heat sealing mechanism according to claim 4, characterized in that: The lower end of the power shaft of the hot-pressing lifting device (3) is connected to a heat-insulating plate (301), and the heat-insulating plate (301) is connected to the hot-pressing riveting block (4) via a connecting rod (302).

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