Heat sealing machine with multiple sealing strips

Abstract

The utility model relates to the technical field of plastic sealing, in particular to a multi-sealing-strip heat sealing machine which comprises a frame, a movable electric heating block and a fixed electric heating block. Two parallel sliding rails are arranged on the inner top of the frame, the movable electric heating block and the fixed electric heating block are installed on the two parallel sliding rails, a plurality of limiting grooves are correspondingly formed in the opposite sides of the movable electric heating block and the fixed electric heating block, buffering pads are arranged in the limiting grooves, electric heating pieces are arranged on the buffering pads, and linear driving equipment is installed on the inner side face of the frame. The movable electric heating block is driven to move along the sliding rail. According to the heat seal sealing machine, a plurality of electric heating pieces are correspondingly arranged on the opposite sides of the movable electric heating block and the fixed electric heating block, so that one-time multi-channel sealing heat seal of a plastic bag can be realized; therefore, unqualified heat sealing caused by non-uniform stress of the oppositely arranged electric heating sheets during heat sealing of multiple seals can be effectively avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic sealing, in particular to a multi-strip heat sealing machine. Background Art

[0002] The current pneumatic heat sealing machine mainly consists of a frame, a fixed electric heating block, a movable electric heating block and a cylinder. Among them, electric heating sheets are installed at the positions corresponding to the same height of the movable electric heating block and the fixed electric heating block. When it is necessary to seal a plastic bag, the open end of the plastic bag is placed between the electric heating sheets opposite to the fixed electric heating block and the movable electric heating block. The cylinder pushes the movable electric heating block to clamp the bag, and then heat sealing can be achieved by energizing the electric heating sheets.

[0003] However, at most two electric heating sheets can be arranged on the electric heating block of the current pneumatic heat sealing machine, that is, at most two seals can be made each time. When three or four seals are required, at least two seals are needed. For a single machine device operated manually, this undoubtedly greatly increases the labor intensity and thus reduces the working efficiency.

[0004] Therefore, there is an urgent need for a multi-strip heat sealing machine to effectively improve the sealing efficiency while ensuring the quality of heat sealing. Content of the Utility Model

[0005] The purpose of the utility model is to solve the problem that the existing pneumatic heat sealing machine can only seal two seals at most each time. When more than two seals are required for the same plastic bag, multiple seals are needed, resulting in low sealing efficiency. A multi-strip heat sealing machine is provided.

[0006] The technical solution of the utility model is as follows:

[0007] A multi-strip heat sealing machine includes a frame, a movable electric heating block and a fixed electric heating block;

[0008] Two parallel slide rails are arranged at the inner top of the frame. The movable electric heating block and the fixed electric heating block are both installed on the two parallel slide rails through sliders. A plurality of limiting grooves are correspondingly arranged on the opposite sides of the movable electric heating block and the fixed electric heating block. Buffer pads are arranged in the limiting grooves, and electric heating sheets are arranged on the buffer pads. A linear driving device is installed on the inner side surface of the frame for driving the movable electric heating block to move along the slide rail.

[0009] Preferably, both the movable electric heating block and the fixed electric heating block are connected to a relay for controlling the time of each heat sealing.

[0010] Preferably, both the movable electric heating block and the fixed electric heating block are connected to a temperature controller for controlling the electric heating sheet to heat to a set temperature value.

[0011] Preferably, the buffer pad is a silica gel pad.

[0012] Preferably, the fixed electric heating block is fixedly connected to the slide rail through the slider.

[0013] Preferably, the linear driving device is a cylinder driving device. The cylinder driving device includes a piston rod and a cylinder for driving the piston rod to reciprocate linearly, and the piston rod is connected to the movable electric heating block.

[0014] Preferably, both the slide rail and the slider are made of metal.

[0015] Preferably, the metal is 304 stainless steel or aluminum alloy.

[0016] Preferably, the frame is in a shape of "Ji".

[0017] Preferably, the frame in the shape of "Ji" is made by an integral molding process.

[0018] According to the above technical solution, based on this multi-seal heat-sealing and capping machine, in the actual application process, by correspondingly arranging a plurality of heating sheets in the limiting grooves on the opposite sides of the movable electric heating block and the fixed electric heating block, multi-channel heat-sealing of plastic bags can be realized at one time. Further, by installing the movable electric heating block and the fixed electric heating block on the slide rail, it can effectively avoid the offset of a plurality of oppositely arranged heating sheets due to uneven force during multi-channel heat-sealing, resulting in unqualified heat-sealing of the seal. Description of the Drawings

[0019] Figure 1 is a schematic structural diagram of a multi-seal heat-sealing and capping machine;

[0020] Figure 2 is a schematic structural diagram when the movable electric heating block and the fixed electric heating block of the multi-seal heat-sealing and capping machine are heat-sealing.

[0021] Description of the Reference Numerals

[0022] 1. Frame; 2. Slide rail; 3. Slider; 4. Movable electric heating block; 5. Linear driving device; 6. Fixed electric heating block; 7. Limiting groove. Detailed Embodiments

[0023] The following details the specific embodiments of the embodiments of the present invention. It should be understood that the specific embodiments described herein are only for the purpose of illustration and explanation of the embodiments of the present invention, and are not used to limit the embodiments of the present invention.

[0024] The present invention provides a multi-seal heat-sealing and capping machine, as Figure 1-2 shown, this multi-seal heat-sealing and capping machine includes a frame 1, a movable electric heating block 4 and a fixed electric heating block 6;

[0025] Two parallel slide rails 2 are provided at the inner top of the frame 1. The movable electric heating block 4 and the fixed electric heating block 6 are both installed on the two parallel slide rails 2 through sliders 3. A number of limiting grooves 7 are correspondingly provided on the opposite sides of the movable electric heating block 4 and the fixed electric heating block 6. Buffer pads are arranged in the limiting grooves 7, and electric heating sheets are arranged on the buffer pads. A linear driving device 5 is installed on the inner side surface of the frame 1 for driving the movable electric heating block 4 to move along the slide rail 2. Among them, the number of the electric heating sheets can be set at a preset interval according to actual application needs. Specifically, for example, it can be three or four.

[0026] According to the above technical solution, based on this multi-seal heat-sealing and capping machine, in the actual application process, by correspondingly arranging a number of electric heating sheets in the limiting grooves on the opposite sides of the movable electric heating block and the fixed electric heating block, multi-channel seal heat-sealing of plastic bags can be realized. Further, by installing the movable electric heating block and the fixed electric heating block on the slide rails, it can effectively avoid the deviation of a plurality of oppositely arranged electric heating sheets due to uneven force during multi-channel seal heat-sealing, resulting in unqualified seal heat-sealing. Among them, the reason for the deviation is that since the displacement guidance of the movable electric heating block only depends on the cylinder piston, when a plurality of electric heating sheets installed on the fixed electric heating block and the movable electric heating block are squeezed by the cylinder thrust, non-parallel displacements will occur, so that the cylinder extrusion forces received by the oppositely arranged electric heating sheets are unbalanced. And this phenomenon usually does not appear when the number of the electric heating sheets is one or two, but when the number of the electric heating sheets is three or more, there will always be a problem that the quality of one or more seals is unqualified. By installing the fixed electric heating block and the movable electric heating block on the slide rails, the parallelism and stability of the fixed electric heating block and the movable electric heating block during heat-sealing can be effectively guaranteed.

[0027] In the multi-seal heat-sealing and capping machine of the present utility model, preferably, both the movable electric heating block 4 and the fixed electric heating block 6 are connected to a relay for controlling the heat-sealing time each time. By connecting the movable electric heating block 4 and the fixed electric heating block 6 to the relay, in actual application, while ensuring the heat-sealing quality, the heat-sealing time can be accurately controlled, thereby improving the heat-sealing efficiency of plastic bags.

[0028] In the multi-seal heat-sealing and sealing machine of the present utility model, preferably, the movable electric heating block 4 and the fixed electric heating block 6 are both connected to a temperature controller, which is used to control the heating sheet to heat to a set temperature value. By connecting the movable electric heating block 4 and the fixed electric heating block 6 to the temperature controller, in actual application, the heat-sealing temperature can be accurately controlled based on plastic bags of different materials, thereby ensuring the heat-sealing effect. In another preferred embodiment, the temperature controller can also be used in cooperation with a relay, so as to maximize the heat-sealing efficiency while ensuring the heat-sealing quality of the plastic bag.

[0029] In the multi-seal heat-sealing and sealing machine of the present utility model, preferably, the buffer pad is a silica gel pad, more preferably a high-temperature-resistant silica gel pad, so that it will not be damaged due to the high temperature of the heating sheet during actual application, and its elasticity can also be used to ensure that the opposing heating sheets fit as closely as possible after being squeezed. In a specific embodiment, the width of the limit groove is 13 - 17 mm, preferably 14 - 16 mm, most preferably 15 mm, and the depth is 5 - 9 mm, preferably 6 - 8 mm, most preferably 7 mm; the width of the silica gel pad is the same as or slightly smaller than the width of the limit groove, and the thickness is 8 - 12 mm, preferably 9 - 11 mm, most preferably 10 mm. In another specific embodiment, a heating sheet flush with the opening of the limit groove is provided on the buffer pad.

[0030] In the multi-seal heat-sealing and sealing machine of the present utility model, preferably, the fixed electric heating block 6 is fixedly connected to the slide rail 2 through the slider 3, so that in actual application, only by controlling the movement of the movable electric heating block 4 along the slide rail 2 can the heat-sealing of the plastic bag be achieved, without the need to use two linear driving devices 5, thus saving costs.

[0031] In the multi-seal heat-sealing and sealing machine of the present utility model, preferably, the linear driving device 5 is a cylinder driving device, and the cylinder driving device includes a piston rod and a cylinder for driving the piston rod to reciprocate linearly. The piston rod is connected to the movable electric heating block 4, so that the movable electric heating block 4 can move along the slide rail 2. Among them, when the linear driving device 5 is a cylinder driving device, the piston rod is connected to the movable electric heating block 4 through a floating joint.

[0032] In the multi-seal heat-sealing and sealing machine of the present utility model, preferably, both the slide rail 2 and the slider 3 are made of metal. Further preferably, the metal is 304 stainless steel or aluminum alloy, so as to avoid the rusting of the slide rail 2 and the slider 2 from affecting the linear movement of the movable electric heating block 4 while ensuring the structural strength.

[0033] In the multi-seal heat-sealing and sealing machine of the present utility model, preferably, as Figure 1As shown, the frame 1 is in a U-shape. Of course, it can also be in other configurations with the same function. In a preferred embodiment, the U-shaped frame 1 is made of metal by an integral forming process to ensure the structural strength.

[0034] The present utility model will be described in detail below through embodiments, but the protection scope of the present utility model is not limited thereto.

[0035] Embodiment 1

[0036] Adopt a multi-seal heat-sealing machine as Figure 1-2 shown for the heat-sealing of three seals of a plastic bag. Specifically, the multi-seal heat-sealing machine includes a frame 1, a movable electric heating block 4, and a fixed electric heating block 6;

[0037] Two parallel slide rails 2 are provided on the inner top of the frame 1. The movable electric heating block 4 and the fixed electric heating block 6 are both installed on the two parallel slide rails 2 through sliders 3. Three limiting grooves 7 are correspondingly provided on the opposite sides of the movable electric heating block 4 and the fixed electric heating block 6. Buffer pads are provided in all three limiting grooves 7, and electric heating sheets are provided on the buffer pads. A linear driving device 5 is installed on the inner side surface of the frame 1 for driving the movable electric heating block 4 to move along the slide rail 2;

[0038] The buffer pad is a silica gel pad, and the frame 1 is in a U-shape. The U-shaped frame 1 is made by an integral forming process; both the slide rail 2 and the slider 3 are made of 304 stainless steel. The fixed electric heating block 6 is fixedly connected to the slide rail 2 through the slider 3. The linear driving device 5 is a cylinder driving device. The cylinder driving device includes a piston rod and a cylinder for driving the piston rod to reciprocate linearly. The piston rod is connected to the movable electric heating block 4.

[0039] In actual application, first place the open plastic bag between the limiting groove 7 of the movable electric heating block 4 and the limiting groove 7 of the fixed electric heating block 6. Then, under the action of the cylinder, move the movable electric heating block 4 along the slide rail 2 towards the fixed electric heating block 6 until the plastic bag is pressed tightly. Finally, complete the heat-sealing of the three seals of the plastic bag based on the electric heating sheet.

[0040] After testing, when using the multi-seal heat-sealing machine of the present utility model in actual application, it can simultaneously realize the heat-sealing of multiple seals, and there will be no problem of unqualified sealing quality.

[0041] Embodiment 2

[0042] Implemented with reference to Embodiment 1. The difference is that both the movable electric heating block 4 and the fixed electric heating block 6 are connected to a relay for controlling the heat-sealing time for each time.

[0043] After testing, by using the multi-seal heat-sealing and sealing machine of the present utility model, compared with the solution in Embodiment 1, it is possible to further accurately control the heat-sealing time while ensuring the heat-sealing quality, thereby improving the heat-sealing efficiency of plastic bags.

[0044] Embodiment 3

[0045] Implemented with reference to Embodiment 2, the difference is that both the movable electric heating block 4 and the fixed electric heating block 6 are connected to a temperature controller for controlling the heating sheet to be heated to a set temperature value.

[0046] After testing, by using the multi-seal heat-sealing and sealing machine of the present utility model, compared with the solution in Embodiment 2, it is possible to further improve the heat-sealing efficiency of plastic bags while ensuring the heat-sealing quality.

[0047] The multi-seal heat-sealing and sealing machine provided by the present utility model can realize multi-channel sealing and heat-sealing of plastic bags at one time by correspondingly arranging a plurality of heating sheets in the limiting grooves on the opposite sides of the movable electric heating block and the fixed electric heating block. Further, by installing the movable electric heating block and the fixed electric heating block on the slide rail, it is possible to effectively avoid the deviation of the plurality of oppositely arranged heating sheets due to uneven force during multi-channel sealing and heat-sealing, resulting in unqualified sealing and heat-sealing.

[0048] The preferred embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited thereto. Within the technical concept of the present utility model, various simple modifications can be made to the technical solutions of the present utility model. To avoid unnecessary repetition, the present utility model will not separately describe various possible combinations. But these simple modifications and combinations should also be regarded as the content disclosed by the present utility model and all fall within the protection scope of the present utility model.

Claims

1. A multi-strip heat sealing machine, characterized in that: The multi-seal heat-sealing machine includes a frame (1), a movable electric heating block (4), and a fixed electric heating block (6); Two parallel slide rails (2) are provided at the inner top of the frame (1). The movable electric heating block (4) and the fixed electric heating block (6) are both installed on the two parallel slide rails (2) through sliders (3). A number of limiting grooves (7) are correspondingly provided on the opposite sides of the movable electric heating block (4) and the fixed electric heating block (6). A buffer pad is provided in the limiting groove (7), and a heating sheet is provided on the buffer pad. A linear driving device (5) is installed on the inner side surface of the frame (1) for driving the movable electric heating block (4) to move along the slide rail (2).

2. The multi-strip heat sealing machine according to claim 1, characterized in that: Both the movable electric heating block (4) and the fixed electric heating block (6) are connected to a relay for controlling the time of each heat-sealing.

3. The multi-strip heat sealing machine according to claim 1, characterized in that: Both the movable electric heating block (4) and the fixed electric heating block (6) are connected to a temperature controller for controlling the heating sheet to heat to a set temperature value.

4. The multi-strip heat sealing machine according to claim 1, characterized in that: The buffer pad is a silica gel pad.

5. The multi-strip heat sealing machine according to claim 1, characterized in that: The fixed electric heating block (6) is fixedly connected to the slide rail (2) through the slider (3).

6. The multi-strip heat sealing machine according to claim 1, characterized in that: The linear driving device (5) is a cylinder driving device. The cylinder driving device includes a piston rod and a cylinder for driving the piston rod to reciprocate linearly. The piston rod is connected to the movable electric heating block (4).

7. The multi-strip heat sealing machine according to claim 1, characterized in that: Both the slide rail (2) and the slider (3) are made of metal.

8. The multi-strip heat sealing machine according to claim 7, characterized in that: The metal is 304 stainless steel or aluminum alloy.

9. The multi-strip heat sealing machine according to claim 1, characterized in that: The frame (1) is in a shape of "ji".

10. The multi-strip heat sealing machine according to claim 9, characterized in that: The frame (1) in the shape of "ji" is made by an integral forming process.

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