Heat sealing machine with adjustable heat sealing width

Abstract

The heat sealing machine comprises an installation box and a fixing plate, the fixing plate is connected with an upper pressing plate through a lifting mechanism, a linear groove is formed in the upper end face of the installation box, a heat sealing strip is laid in the linear groove, through holes communicated with the interior of the installation box are formed in the heat sealing strip and the linear groove, and heating plates are arranged above the heat sealing strip respectively. An interval space is reserved between every two adjacent heating plates, the two ends of each heating plate are fixedly screwed to the upper end face of the mounting box through conductive bolts, conductive blocks are arranged in the interval spaces, insulating ejector rods are arranged at the bottoms of the conductive blocks, the ejector rods are mounted in the mounting box in an up-down sliding mode, electric push rods are further arranged at the bottoms of the ejector rods, and contact pieces are further arranged on the side walls of the ejector rods. An upper contact and a lower contact which are used for making contact with the contact piece are further arranged beside the ejector rod, and a corresponding circuit system is further arranged in the installation box. According to the heat sealing machine, through the characteristic that the heat sealing width is adjustable, the arrangement mode during packaging film conveying is expanded, and the heat sealing efficiency of different heat sealing specifications is improved with low cost.

Description

Technical Field

[0001] The utility model relates to the technical field of heat sealing machines, in particular to a heat sealing machine with adjustable heat sealing width. Background Art

[0002] Heat sealers are primarily used to seal thermoplastic materials together. They can be used for sealing packaged products, sealing plastic films, and various other heat sealing applications. Heat sealers work by using heat and pressure to bond thermoplastic materials together. During the heat sealing process, the heat sealer applies heat to specific contact areas or paths, causing the thermoplastic to melt and seal or weld together. Heat sealers are widely used in a variety of industries such as food, pharmaceuticals, electronics, printing, and more. In addition, heat sealers can also be used to manufacture a variety of other products such as shrink film, heat shrink packaging, labels, and more.

[0003] The packaging film needs to be heat-sealed during the bag-making process. The heat-sealing width of existing heat sealers is basically fixed, so the packaging film conveying method must also be formulated according to the width of the heat sealer. This results in the inability to achieve the optimal conveying layout of some packaging films with different heat-sealing specifications when performing heat-sealing specifications, resulting in low efficiency. However, the cost of arranging a variety of heat sealers and packaging film conveyors with different specifications is too high.

[0004] Therefore, it is necessary to design a heat sealing machine with adjustable heat sealing width. Utility Model Content

[0005] The purpose of the utility model is to provide a heat sealing machine with adjustable heat sealing width, which utilizes the characteristic of adjustable heat sealing width to expand the arrangement mode of packaging film during transportation, improve the heat sealing efficiency of different heat sealing specifications at low cost, and solve the problems described in the background technology.

[0006] The technical solution of the utility model is achieved in this way:

[0007] A heat sealing machine with adjustable heat sealing width comprises an installation box fixedly installed at the bottom and a fixed plate fixedly installed above the installation box, an upper pressing plate is arranged below the fixed plate, the upper pressing plate and the fixed plate are connected by a lifting mechanism, a linear groove and a pressure touch switch are also provided on the upper end surface of the installation box, a heat sealing strip is laid in the linear groove, a plurality of through holes communicating with the interior of the installation box are jointly provided on the heat sealing strip and the linear groove, heating plates are also respectively arranged above the heat sealing strips on both sides of the through hole, a spacing space is left between the two adjacent heating plates, both ends of the heating plate are fixedly screwed to the upper end surface of the installation box by conductive bolts, the conductive bolts extend downward into the installation box, a conductive block is also arranged in the spacing space, and the conductive block has two ends. The ends are respectively abutted against the heating plates at the two ends of the spacing space, and an insulating top rod is also provided at the bottom of the conductive block, and the top rod extends downward through the through hole into the installation box, and the top rod is slid up and down and installed in the installation box, and an electric push rod is also provided at the bottom of the top rod, and the bottom of the electric push rod is fixed on the bottom wall of the installation box, the top of the telescopic rod of the electric push rod is driven and connected with the bottom of the top rod, and a contact sheet is also provided on the side wall of the top rod, and an upper contact and a lower contact for contacting the contact sheet are also provided next to the top rod, and a transformer, a relay and a controller are also provided in the installation box, the conductive bolt is electrically connected to the relay, the pressure touch switch, the contact sheet, the upper contact and the lower contact are respectively electrically connected to the controller, and the transformer, the relay and the controller are electrically connected to each other.

[0008] When using the above solution, the electric push rod pushes the top rod upward, so that the conductive block enters the spacing space, connects the heating plates at both ends of the through hole, and the contact piece on the top rod pushed upward contacts the upper contact point to form a first circuit. After the controller detects that the first circuit is connected, it controls the relay to disconnect the power supply of the conductive bolts at both ends of the top rod pushed upward. The electric push rod pulls the top rod back downward, the conductive block leaves the spacing space, the heating plates at both ends of the through hole are disconnected, and the contact piece on the top rod pulled down contacts the lower contact point to form a second circuit. After the controller detects that the second circuit is connected, it controls the relay to power the conductive bolts of the top rod pulled down near the initial end of the linear slot, so that the heating length of the heating plate is the length from the initial end of the linear slot to the top rod pulled down.

[0009] Naturally, when all the push rods are pushed up, the conductive bolts at both ends of the linear slot are powered.

[0010] The transformer is used to regulate the current through the heating plate according to the length of the heating plate and the required heating temperature.

[0011] The pressure touch switch is used to control the upper pressure plate to be pressed down, and the upper pressure plate presses the pressure touch switch to control the total connectivity of the heating plate circuit.

[0012] A further technical solution is that the upper sliding sleeve of the push rod is provided with a conductive upper sliding sleeve and a lower sliding sleeve, and the upper sliding sleeve and the lower sliding sleeve are also fixedly installed in the installation box through insulating connecting parts, the upper contact is the upper sliding sleeve, and the lower contact is the lower sliding sleeve.

[0013] By providing a conductive upper sliding sleeve and a lower sliding sleeve, the sliding installation requirements of the ejector rod and the functional requirements of the upper and lower contacts are simultaneously met.

[0014] A further technical solution is that the upper sideline distance between the two heating plates next to the through hole is shorter than the lower sideline distance, so that the vertical section of the spacing space is a trapezoid, and the corresponding vertical section of the conductive block is also a trapezoid of the same size.

[0015] By setting a trapezoidal structure that is narrow at the top and wide at the bottom, the contact area between the conductive block and the heating plate is made larger. At the same time, during the upward push process, the trapezoidal structure cooperates with the elastic deformation and downward pressure of the heating plate itself, which can make the contact between the heating plate and the conductive block more stable.

[0016] A further technical solution is that the lifting mechanism includes a sliding rod arranged on the upper end surface of the upper pressure plate, the number of the sliding rods is at least two, and the sliding rod is slidably passed through the fixed plate. The lifting mechanism also includes a telescopic push rod fixed on the lower end surface of the fixed plate, and the telescopic rod of the telescopic push rod extends downward and is connected to the upper end of the upper pressure plate.

[0017] A further technical solution is that a top seat is fixedly provided at the bottom of the push rod, and the telescopic rod of the electric push rod is connected to the bottom of the top seat.

[0018] A further technical solution is that the through hole is a long strip-shaped through hole.

[0019] A further technical solution is that the upper end surface of the conductive bolt is flush with the upper end surface of the heating plate.

[0020] The beneficial effects of the utility model are:

[0021] 1. By setting up a conductive block, a push rod, an electric push rod and a separated heating plate, when the length of the heating plate needs to be extended, the push rod is pushed up by the electric push rod so that the conductive block connects the heating plates at both ends of the through hole, and the function of quickly switching the connection length of the heating plate can be realized. In combination with the contact sheet, the upper contact point and the lower contact point, and the corresponding circuit, the function of powering and heating the heating plate of the target length can be realized. Finally, the function of adjustable heat sealing width is realized.

[0022] 2. By setting a trapezoidal conductive block and spacing space, the upper end surface of the conductive bolt is flush with the upper end surface of the heating plate, so that the contact surface between the conductive block and the heating plate is larger. At the same time, during the upward push process, the trapezoidal structure cooperates with the elastic deformation of the heating plate itself to press down, which can make the contact between the heating plate and the conductive block more stable, and also make the transition between the heating plates smoother, thereby improving the continuity of the heat seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is the overall schematic diagram of the utility model;

[0024] Figure 2 for Figure 1 A magnified view of the structure at center;

[0025] Figure 3 for Figure 2 Sectional view along line BB.

[0026] In the figure, 1, fixed plate, 2, sliding rod, 3, telescopic push rod, 4, upper pressure plate, 5, installation box, 6, conductive bolts, 7, heating plate, 8, conductive block, 9, electric push rod, 10, transformer, 11, relay, 12, controller, 13, pressure touch switch, 14, lower sliding sleeve, 15, push rod, 16, contact piece, 17, upper sliding sleeve, 18, heat sealing strip, 19, through hole, 20, spacing space, 21, top seat, 22, first connecting rod, 23, second connecting rod. DETAILED DESCRIPTION

[0027] In order to better understand the technical content of the present invention, specific embodiments are provided below, and the present invention is further described in conjunction with the accompanying drawings.

[0028] See also Figures 1 to 3 A heat sealer with adjustable heat seal width comprises an installation box 5 fixedly installed below and a fixed plate 1 fixedly installed above the installation box 5. An upper pressing plate 4 is arranged below the fixed plate 1, and the upper pressing plate 4 and the fixed plate 1 are connected by a lifting mechanism.

[0029] Specifically, the lifting mechanism includes two slide bars 2 symmetrically arranged on the upper end surface of the upper pressing plate 4, the slide bars 2 are slidably arranged in the fixed plate 1, and the lifting mechanism also includes a telescopic push rod 3 fixed on the lower end surface of the fixed plate 1, and the telescopic rod of the telescopic push rod 3 extends downward and is connected to the upper end of the upper pressing plate 4. Preferably, the telescopic push rod 3 is a pneumatic telescopic push rod 3.

[0030] The upper end surface of the installation box 5 is provided with a linear groove and a pressure touch switch 13, and a heat seal strip 18 is laid in the linear groove. Preferably, the heat seal strip 18 is a silicone strip. The heat seal strip 18 and the linear groove are provided with a plurality of long through holes 19 connected to the inside of the installation box 5. A heating plate 7 is also provided above the heat seal strip 18 on both sides of the through hole 19. Both ends of the heating plate 7 are fixedly screwed to the upper end surface of the installation box 5 by conductive bolts 6. The upper end surface of the conductive bolts 6 is flush with the upper end surface of the heating plate 7, and the conductive bolts 6 extend downward into the installation box 5.

[0031] A spacing space 20 is left between two adjacent heating plates 7, and the distance between the upper edges of the two heating plates 7 next to the through hole 19 is shorter than the distance between the lower edges, so that the vertical section of the spacing space 20 is a trapezoid. A conductive block 8 is also provided in the spacing space 20, and the corresponding vertical section of the conductive block 8 is also a trapezoid of the same size, and the two ends of the conductive block 8 are respectively attached to the heating plates 7 at the two ends of the spacing space 20.

[0032] An insulating top rod 15 is also provided at the bottom of the conductive block 8. The top rod 15 extends downward through the through hole 19 into the installation box 5. The top rod 15 is slidably installed in the installation box 5. Specifically, the upper sliding sleeve of the top rod 15 is provided with a conductive upper sliding sleeve 17 and a lower sliding sleeve 14. The upper sliding sleeve 17 and the lower sliding sleeve 14 are also fixedly installed on the inner wall of the installation box 5 through an insulating first connecting rod 22 and a second connecting rod 23. A contact piece 16 is also provided on the side wall of the top rod 15. The upper sliding sleeve 17 is an upper contact point, and the lower sliding sleeve 14 is a lower contact point.

[0033] A top seat 21 is also provided at the bottom of the top rod 15 , and an electric push rod 9 is also provided below the top seat 21 . The bottom of the electric push rod 9 is fixed on the bottom wall of the installation box 5 , and the top of the telescopic rod of the electric push rod 9 is connected to the bottom of the top seat 21 .

[0034] A transformer 10, a relay 11 and a controller 12 are also provided in the installation box 5. The controller 12 adopts an STM32 single-chip microcomputer or a SMART200 PLC controller 12. The conductive bolt 6 is electrically connected to the relay 11. The pressure touch switch 13, the contact piece 16, the upper contact and the lower contact are electrically connected to the controller 12 respectively. The transformer 10, the relay 11 and the controller 12 are electrically connected to each other.

[0035] It should be noted that a layer of heat-conductive film needs to be laid on the top of the heating plate 7 to prevent the packaging film from sticking to the heating plate 7. This is a conventional technical means and will not be improved or introduced in detail here. When implementing this solution, technical personnel in this field should adopt corresponding heat-conductive films to cover the heating plate 7. Therefore, the heat-conductive film not mentioned above will not affect the implementation of this solution.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A heat sealer with adjustable heat seal width, comprising a mounting box fixedly mounted below and a fixing plate fixedly mounted above the mounting box, an upper pressing plate being arranged below the fixing plate, and the upper pressing plate and the fixing plate being connected via a lifting mechanism, characterized in that: The upper end surface of the installation box is also provided with a linear groove and a pressure touch switch, a heat sealing strip is laid in the linear groove, and a plurality of through holes connected to the inside of the installation box are jointly provided on the heat sealing strip and the linear groove, and heating plates are respectively provided above the heat sealing strips on both sides of the through hole, and a spacing space is left between the two adjacent heating plates, and both ends of the heating plates are fixedly screwed to the upper end surface of the installation box by conductive bolts, and the conductive bolts extend downward into the installation box, and a conductive block is also provided in the spacing space, and both ends of the conductive block are respectively abutted against the heating plates at both ends of the spacing space, and an insulating top rod is also provided at the bottom of the conductive block, and the top rod is downward The push rod extends into the installation box through the through hole, and is slidably installed in the installation box up and down. An electric push rod is also provided at the bottom of the push rod, and the bottom of the electric push rod is fixed on the bottom wall of the installation box. The top of the telescopic rod of the electric push rod is driven and connected with the bottom of the push rod. A contact piece is also provided on the side wall of the push rod, and an upper contact and a lower contact for contacting the contact piece are also provided next to the push rod. A transformer, a relay and a controller are also provided in the installation box. The conductive bolt is electrically connected to the relay, and the pressure touch switch, the contact piece, the upper contact and the lower contact are electrically connected to the controller respectively, and the transformer, the relay and the controller are electrically connected to each other.

2. A heat sealer with adjustable heat seal width according to claim 1, characterized in that: The upper sliding sleeve of the push rod is provided with a conductive upper sliding sleeve and a lower sliding sleeve, and the upper sliding sleeve and the lower sliding sleeve are also fixedly installed in the installation box through insulating connecting pieces, the upper contact is the upper sliding sleeve, and the lower contact is the lower sliding sleeve.

3. A heat sealer with adjustable heat seal width according to claim 2, characterized in that: The distance between the upper edges of the two heating plates next to the through hole is shorter than the distance between the lower edges, so that the vertical section of the spacing space is a trapezoid, and the corresponding vertical section of the conductive block is also a trapezoid of the same size.

4. A heat sealer with adjustable heat seal width according to any one of claims 1 to 3, characterized in that: The lifting mechanism includes a sliding rod arranged on the upper end surface of the upper pressure plate, the number of the sliding rods is at least two, and the sliding rod is slidably inserted into the fixed plate. The lifting mechanism also includes a telescopic push rod fixed on the lower end surface of the fixed plate, and the telescopic rod of the telescopic push rod extends downward and is connected to the upper end of the upper pressure plate.

5. The heat sealer with adjustable heat seal width according to claim 4, characterized in that: A top seat is fixedly arranged at the bottom of the top rod, and the telescopic rod of the electric push rod is connected to the bottom of the top seat.

6. The heat sealer with adjustable heat seal width according to claim 4, characterized in that: The through hole is a long strip-shaped through hole.

7. The heat sealer with adjustable heat seal width according to claim 4, characterized in that: The upper end surface of the conductive bolt is flush with the upper end surface of the heating plate.

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