Heat sealing device

Abstract

The utility model provides a heat sealing device, and relates to the field of heat sealing. The device comprises a driving mechanism and a heat sealing assembly, the heat sealing assembly comprises a base body and swing arm assemblies symmetrically arranged on the left side and the right side, the action end of the driving mechanism is in transmission connection with the base body, each swing arm assembly comprises a first swing arm, a second swing arm and a clamping piece, and the clamping pieces are connected with heat sealing chucks; one end of each first swing arm is hinged to the corresponding fixed point position, the other end of each first swing arm is hinged to the corresponding clamping piece, one end of each second swing arm is hinged to the base body, the other end of each second swing arm is hinged to the corresponding clamping piece, and the number of at least one of the first swing arms and the second swing arms is two or more to form a parallelogram connecting rod mechanism. The base body is driven by the driving mechanism to move linearly, and the swing arm assembly conducts swing arm so that the clamping piece can conduct heat sealing opening and closing actions. According to the device, the problem that the posture of the heat-sealing chuck is unstable can be solved, and the heat-sealing effect of the heat-sealing part at the heat-sealing position is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of heat sealing, and more specifically, to a heat sealing device. Background Technology

[0002] Heat sealing is the most common and practical bag-making method used in composite packaging materials. It utilizes various external conditions (such as electric heating, high-frequency voltage, or ultrasound) to heat the sealing area of ​​the plastic bag, making it viscous and fluid, and then uses pressure to fuse the two layers of film together. Heat-press sealing involves heating the material at the sealing area until it reaches a viscous state, then applying pressure to seal it. This is generally done using a heat-press sealing device or machine. In this process, the heat-sealing clamp is the actuator of the heat-press sealing device. However, existing heat-sealing clamps have a simple structure, and their position is directly adjusted by a drive mechanism, resulting in unstable clamp posture. This leads to wrinkles or unevenness at the heat-sealed area. Utility Model Content

[0003] The purpose of this invention is to provide a heat-sealing device to solve the problem of unstable posture of the heat-sealing clamp. To achieve the above objective, the technical solution adopted by this invention is as follows:

[0004] A heat-sealing device, comprising: a drive mechanism and a heat-sealing assembly, the heat-sealing assembly including a base and swing arm assemblies symmetrically arranged on the left and right sides, the actuating end of the drive mechanism being drively connected to the base, wherein:

[0005] The swing arm assembly includes a first swing arm, a second swing arm, and a clamping member. The clamping member is connected to a heat-sealing chuck. One end of the first swing arm is hinged to a fixed point, and the other end of the first swing arm is hinged to the clamping member. One end of the second swing arm is hinged to the base body, and the other end of the second swing arm is hinged to the clamping member. At least one of the first and second swing arms is provided with two or more links to form a parallelogram linkage mechanism. The base body is driven to move linearly by the driving mechanism, and the swing arm assembly swings to enable the heat-sealing chuck to perform a heat-sealing opening and closing action.

[0006] In this device, in order to provide higher swing stability, reduce the number of parts and related connectors, and save space, the hinge point of swing arm one and the clamping member is coaxial with the hinge point of swing arm two and the clamping member.

[0007] To ensure that the heat-sealing chuck can fully grip the packaging bag, the actuating end of the drive mechanism is connected to the base through an elastic component. When the drive mechanism applies a feed amount exceeding the preset length, the device uses the elastic component to compensate for the error in the full clamping of the heat-sealing chuck, thus ensuring the stability of the heat sealing.

[0008] To clarify the specific structure of the elastic component, the elastic component includes a connecting rod and an elastic element. The connecting rod is connected between the actuating end of the driving mechanism and the base, and the base or the actuating end of the driving mechanism is slidably engaged with the connecting rod. The elastic element is sleeved on the outer periphery of the connecting rod.

[0009] Preferably, the elastic element is a spring.

[0010] In this device, to reduce the structural weight of the heat-sealing assembly, weight-reduction holes are provided on the components of the heat-sealing assembly. Preferably, one or more weight-reduction holes can be provided on the substrate or the clamping component.

[0011] To achieve multi-station heat sealing and enable batch heat sealing of packaging bags, multiple heat sealing components are connected in parallel, and these multiple heat sealing components are connected to the driving end of the drive mechanism to form a multi-station heat sealing point.

[0012] In multi-station heat sealing, to ensure that the driving mechanism's actuating end acts stably on each heat sealing assembly and that each heat sealing clamp can fully hold the packaging bag, thus minimizing the error in clamping between different heat sealing clamps, a driving link is also included. The driving link extends along the parallel direction of the heat sealing assemblies and is driven linearly by the driving mechanism. The driving link is connected to the base of each heat sealing assembly through elastic components.

[0013] In multi-station heat sealing, to ensure stable hinge connection between the first swing arm and the fixed point, a base fixing rod is included. This base fixing rod extends along the parallel direction of the heat sealing assemblies, and the first swing arms of all the heat sealing assemblies are hinged to this base fixing rod. In this structure, the fixed point is located on the base fixing rod, ensuring stable rotation of the first swing arms of all the heat sealing assemblies.

[0014] Preferably, both ends of the base fixing rod are fixedly connected to the frame.

[0015] The beneficial effects of this utility model are:

[0016] This device introduces a heat-sealing assembly, which includes a base and symmetrically arranged swing arm assemblies on the left and right sides. Each swing arm assembly includes a first swing arm, a second swing arm, and a clamping member. At least one of the first and second swing arms has two or more arms forming a parallelogram linkage mechanism. The base is driven linearly by the drive mechanism, and the swing arm assemblies swing to allow the heat-sealing chuck to perform heat-sealing opening and closing actions. Compared to existing heat-sealing chucks where the position is directly adjusted by the drive mechanism, this device controls the hinge point distribution of the parallelogram linkage mechanism to ensure the clamping member maintains a constant posture during operation. The heat-sealing chuck is connected to the clamping member, thus ensuring the stability of the heat-sealing chuck's posture. This allows the heat-sealing chuck to act on the heat-sealing part in a constant contact state, avoiding wrinkles or unevenness that easily occur at the heat-sealing position.

[0017] Furthermore, in this heat sealing device, the descent and parallel clamping actions can be completed simultaneously during the empty travel with a very small driving force, resulting in a stable sealing effect. Compared with the existing butterfly clamp structure, this heat sealing device has a greater advantage in sealing.

[0018] Other features and advantages of this invention will be set forth in the following description, and some will be obvious from the description or may be learned by practicing the embodiments of this invention. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of the heat sealing device;

[0021] Figure 2 This is a schematic diagram of the first structure of the swing arm assembly;

[0022] Figure 3 This is a schematic diagram of the second structure of the swing arm assembly;

[0023] Figure 4 This is a schematic diagram of the third structure of the swing arm assembly;

[0024] Figure 5 This is a schematic diagram of the overall structure of the heat sealing device with multiple heat sealing points;

[0025] Marked in the image:

[0026] 1. Frame; 2. Drive mechanism; 30. Base; 31. Swing arm one; 32. Swing arm two; 33. Clamping component; 34. Heat sealing chuck; 4. Heat sealing component; 6. Elastic component; 71. Drive connector; 72. Foundation fixing rod. Detailed Implementation

[0027] The following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0028] like Figures 1 to 4 As shown, a heat sealing device includes:

[0029] The drive mechanism 2 and the heat sealing assembly include a base 30 and swing arm assemblies symmetrically arranged on the left and right sides. The actuating end of the drive mechanism 2 is connected to the base 30 for transmission.

[0030] The swing arm assembly includes a first swing arm 31, a second swing arm 32, and a clamping member 33. The clamping member 33 is connected to a heat-sealing chuck 34. One end of the first swing arm 31 is hinged to a fixed point, and the other end of the first swing arm 31 is hinged to the clamping member 33. One end of the second swing arm 32 is hinged to the base 30, and the other end of the second swing arm 32 is hinged to the clamping member 33. At least one of the first swing arm 31 and the second swing arm 32 is provided with two or more links to form a parallelogram linkage mechanism. The base 30 is driven to move linearly by the driving mechanism 2, and the swing arm assembly swings to enable the heat-sealing chuck 34 to perform a heat-sealing opening and closing action.

[0031] In the parallelogram linkage mechanism described above, the parallelogram is formed by the distribution of hinged points to ensure that the clamping member 33 maintains a constant posture during operation, thereby ensuring that the heat-sealing chuck 34 acts on the heat-sealing member 4 in a constant contact state. The specific structure of the swing arm assembly is as follows:

[0032] like Figure 2 The diagram shows a first structural schematic of the swing arm assembly, specifically: both swing arm one 31 and swing arm two 32 are two corresponding parallel swing arms, wherein the hinge points of swing arm one 31 with two fixed points and the hinge point of swing arm one 31 with clamping member 33 together form a parallelogram of four points; the hinge points of swing arm two 32 with clamping member 33 and the hinge point of swing arm two 32 with clamping member 33 together form a parallelogram of four points.

[0033] like Figure 3The diagram shows a second structural design of the swing arm assembly, specifically: the second swing arm 32 consists of two parallel swing arms, one end of each swing arm is hinged to the base 30, and the other end of each swing arm is hinged to the clamping member 33 to form a parallelogram linkage mechanism. Preferably, the first swing arm 31 is a single swing arm.

[0034] like Figure 4 The diagram shows a third structural design for the swing arm assembly, specifically: Swing arm one 31 consists of two parallel swing arms, one end of each swing arm rotating around its respective fixed point; the clamping member 33 is hinged to each swing arm to form a parallelogram linkage mechanism. Preferably, swing arm two 32 is a single swing arm.

[0035] The aforementioned drive mechanism 2 can be fixedly installed on the frame 1 or the mounting base.

[0036] In this device, by setting the drive mechanism 2, a sealing force of 200 kg can be generated, which is four times the force of a normal sealing tape.

[0037] In addition, the sealing temperature of this heat sealing device is relatively low, and the packaging bags sealed under high pressure at low temperature are flatter, less prone to deformation, and have better sealing quality than those sealed under low pressure at high temperature.

[0038] by Figure 1 Taking the horizontal heat sealing of the heat sealing component 4 as an example, the working process of this device is explained below:

[0039] Before heat sealing: The drive mechanism 2 outputs power, and the moving end of the drive mechanism 2 drives the base 30 in the heat sealing assembly to move vertically downward. At the same time, the swing arm 1 31, swing arm 2 32 and clamping member 33 in the swing arm assembly perform their respective swing arm movements. The heat sealing clamps 34 set on the left and right sides continuously approach each other until the heat sealing clamps 34 set on the left and right sides contact the two end faces of the heat sealing member 4.

[0040] Heat sealing: Within a preset time, the heat sealing clamps 34 on both sides complete the heat sealing action on the heat sealing component 4;

[0041] After heat sealing: the drive mechanism 2 outputs power, and the moving end of the drive mechanism 2 drives the base 30 in the heat sealing assembly to move vertically upward. At the same time, the swing arm 1 31, swing arm 2 32 and clamping member 33 in the swing arm assembly perform their respective swing arm movements. The heat sealing clamps 34 set on the left and right sides move away continuously until the base 30 reaches the preset height.

[0042] In this device, to provide higher swing stability, reduce the number of parts and related connectors, and save space, the hinge points of swing arm 31 and clamping member 33 are coaxial with the hinge points of swing arm 32 and clamping member 33. This coaxial hinge point arrangement allows for the compact integration of multiple moving parts, reducing the overall volume occupied, making it particularly suitable for space-constrained applications. Furthermore, the coaxial hinge point arrangement reduces design complexity and facilitates later maintenance.

[0043] To ensure the heat-sealing clamps can fully grip the packaging bag, the actuating end of the drive mechanism 2 is connected to the base 30 via an elastic component. The device operates as follows: the drive mechanism 2 outputs power, causing the actuating end of the drive mechanism 2 to vertically lower the base 30 in the heat-sealing assembly. Simultaneously, the swing arm assembly, including swing arm 31, swing arm 32, and the clamping component 33, performs their respective swing arm movements. The heat-sealing clamps 34 on the left and right sides continuously approach each other. The drive mechanism 2 applies a feed amount exceeding a preset length. The elastic component compensates for any error in the full clamping of the heat-sealing clamps 34, ensuring that the heat-sealing clamps 34 on the left and right sides are always in contact with the two end faces of the heat-sealing component 4, thus guaranteeing the stability of the heat sealing process.

[0044] In this device, to clarify the specific structure of the elastic component, the elastic component includes a connecting rod and an elastic element 6. The connecting rod connects the actuating end of the driving mechanism 2 and the base 30, and the base 30 or the actuating end of the driving mechanism 2 is slidably engaged with the connecting rod. The elastic element 6 is sleeved on the outer periphery of the connecting rod. Preferably, the elastic element 6 is a spring. The introduction of the elastic element 6 can also solve the errors caused by machining, assembly, and wear of mechanical parts.

[0045] In the above structure, the working process of this device is as follows: the drive mechanism 2 outputs power, and the actuating end of the drive mechanism 2 drives the base 30 in the heat sealing assembly to move vertically downward. At the same time, the swing arm 1 31, swing arm 2 32 and clamping member 33 in the swing arm assembly perform their respective swing arm movements. The heat sealing clamps 34 set on the left and right sides continuously approach each other. The drive mechanism 2 applies a feed amount exceeding the preset length. The base 30 or the actuating end of the drive mechanism 2 slides and cooperates with the connecting rod to the preset length of feed amount. The elastic member 6 is compressed to compensate for the error of the heat sealing clamps 34 fully clamping. The heat sealing clamps 34 set on the left and right sides are always in contact with the two end faces of the heat sealing member 4.

[0046] Preferably, there may be multiple elastic elements 6, and the multiple elastic elements 6 are symmetrically arranged on the left and right sides of the base 30 to ensure that the elastic elements 6 have sufficient compensation.

[0047] In this device, to reduce the structural weight of the heat-sealing assembly, weight-reducing holes are provided on the components of the heat-sealing assembly. Preferably, one or more weight-reducing holes can be provided on the base 30 and the clamping member 33 to avoid the drive mechanism 2 needing to output a large amount of power, which would result in energy loss.

[0048] like Figure 5 As shown, to achieve multi-station heat sealing for batch heat sealing of packaging bags, multiple heat sealing components are connected in parallel, and these multiple heat sealing components are connected to the driving end of the drive mechanism 2 to form multi-station heat sealing points. In this case, the heat sealing device can simultaneously drive multiple sets of heat sealing components, and can also achieve single-power drive, where the single power source can be a pneumatic cylinder or an electric cylinder.

[0049] In multi-station heat sealing, to ensure that the driving mechanism's actuating end acts stably on each heat sealing assembly, a driving link 71 is also included. The driving link 71 extends along the parallel direction of the heat sealing assemblies and is driven linearly by the driving mechanism 2. On the other hand, to ensure that each heat sealing clamp can fully hold the packaging bag and that the different heat sealing clamps can compensate for the amount of error in full clamping, the driving link 71 is connected to the base 30 of each heat sealing assembly through elastic components.

[0050] In the above structure, the drive mechanism 2 can be configured as two drive motors arranged side by side, with the two drive motors located at both ends of the drive connector 71, so as to provide stable power input to multiple heat sealing components and ensure batch heat sealing operation.

[0051] In multi-station heat sealing, to ensure stable hinge connection between the first swing arm and the fixed point, a base fixing rod 72 is included. The base fixing rod 72 extends along the parallel direction of the heat sealing assemblies, and all the first swing arms 31 of the heat sealing assemblies are hinged to the base fixing rod 72. In this structure, the fixed point is set on the base fixing rod, ensuring stable rotation of the first swing arms of all the heat sealing assemblies.

[0052] In the above structure, the number of base fixing rods 72 can be determined according to the structural form of the swing arm 31. For example, when the swing arm 31 consists of two parallel swing arms, the base fixing rods 72 can be set to four, with each base fixing rod 72 extending along the parallel direction of the heat sealing assembly, and all the swing arms 31 of the heat sealing assembly in the parallel direction are hinged to the base fixing rods 72.

[0053] Preferably, both ends of the base fixing rod 72 are fixedly connected to the frame 1 for easy installation and maintenance.

[0054] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. A heat sealing device, characterized in that, include: The drive mechanism (2) and the heat sealing assembly, wherein the heat sealing assembly includes a base (30) and swing arm assemblies symmetrically arranged on the left and right sides, and the actuating end of the drive mechanism (2) is connected to the base (30) for transmission, wherein: The swing arm assembly includes a first swing arm (31), a second swing arm (32), and a clamping member (33). The clamping member (33) is connected to a heat-sealing chuck (34). One end of the first swing arm (31) is hinged to a fixed point, and the other end of the first swing arm (31) is hinged to the clamping member (33). One end of the second swing arm (32) is hinged to the base (30), and the other end of the second swing arm (32) is hinged to the clamping member (33). At least one of the first swing arm (31) and the second swing arm (32) is provided with two or more links to form a parallelogram linkage mechanism. The base (30) is driven to move linearly by the driving mechanism (2), and the swing arm assembly swings to make the heat-sealing chuck (34) perform heat-sealing opening and closing actions.

2. The heat sealing device according to claim 1, characterized in that, The hinge points of the first swing arm (31) and the clamping member (33) are coaxial with the hinge points of the second swing arm (32) and the clamping member (33).

3. The heat sealing device according to claim 1, characterized in that, The actuating end of the drive mechanism (2) is connected to the base (30) through an elastic component.

4. A heat sealing device according to claim 3, characterized in that, The elastic component includes a connecting rod and an elastic element (6). The connecting rod is connected between the actuating end of the driving mechanism (2) and the base (30), and the base (30) or the actuating end of the driving mechanism (2) is slidably engaged with the connecting rod. The elastic element (6) is sleeved on the outer periphery of the connecting rod.

5. A heat sealing device according to claim 4, characterized in that, The elastic element (6) is a spring.

6. A heat sealing device according to claim 1, characterized in that, The heat-sealing assembly has weight-reduction holes on its components.

7. A heat sealing device according to any one of claims 1 to 6, characterized in that, Multiple heat sealing components are arranged in parallel, and multiple heat sealing components are connected to the driving end of the driving mechanism (2) to form a multi-station heat sealing point.

8. A heat sealing device according to claim 7, characterized in that, It also includes a drive link (71), which extends along the parallel direction of the heat sealing assembly. The drive link (71) is driven to move linearly by the drive mechanism (2). The drive link (71) is connected to the base (30) of each heat sealing assembly through an elastic component.

9. A heat sealing device according to claim 7, characterized in that, Includes a base fixing rod (72) that extends along the parallel direction of the heat sealing assembly, and the swing arms (31) of all the heat sealing assemblies are hinged to the base fixing rod (72).

10. A heat sealing device according to claim 9, characterized in that, The two ends of the foundation fixing rod (72) are fixedly connected to the frame (1).

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