CN110723362A - Sealing device and packaging machine applying same - Google Patents
Sealing device and packaging machine applying same Download PDFInfo
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- CN110723362A CN110723362A CN201910961128.7A CN201910961128A CN110723362A CN 110723362 A CN110723362 A CN 110723362A CN 201910961128 A CN201910961128 A CN 201910961128A CN 110723362 A CN110723362 A CN 110723362A
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- sealing device
- blade
- sealer
- adjusting
- arm
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
- B65B51/10—Applying or generating heat or pressure or combinations thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B61/00—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages
- B65B61/04—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for severing webs, or for separating joined packages
- B65B61/06—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for severing webs, or for separating joined packages by cutting
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Abstract
The invention relates to a sealing device and a packaging machine applying the sealing device, comprising an upper sealing device and a lower sealing device which are engaged with each other, wherein the upper sealing device and the lower sealing device are provided with sealing device gap adjusting devices which are used for keeping the gap unchanged when the upper sealing device and the lower sealing device are engaged. The invention solves the problems in the prior art, and the sealing device gap adjusting blocks are arranged on the upper sealing device and the lower sealing device, so that the packaging bag is prevented from being crushed. The contact time of the sealing device and the packaging bag is prolonged, the heating time of the sealing position of the packaging bag is sufficient, and the sealing quality is improved. The action driving of the sealer is carried out by adopting a parallelogram double-crank mechanism, so that the rigidity and the stability of the whole machine are improved. And an additional cutter action device is not required to be configured, so that the structure is simplified, and the cost is reduced. The eccentric amount is adjusted by arranging the crank adjusting device, so that the distance between the upper sealing device and the lower sealing device is adjusted, and the problem that products to be processed with different thicknesses and lengths are difficult to adapt to in the prior art is solved.
Description
Technical Field
The present disclosure relates to sealing devices, and particularly to a sealing device and a packaging machine using the same.
Background
The sealing device is a machine for sealing the packaging bags filled with packing materials, and is widely applied to the fields of daily chemical product packaging, food and drug packaging and the like in order to keep products in a sealed manner, maintain the product quality and avoid packaging air leakage after the products are packaged into the packaging bags and seal the packaging bags by using the sealing device. The sealing device in the prior art generally heats an upper sealing device and a lower sealing device, and the upper sealing device and the lower sealing device are cut after being engaged with a packaging bag, so that the sealing device mainly has the following defects:
(1) when the upper and lower sealers are engaged, the engagement distance between the upper and lower sealers cannot be adjusted according to the thickness of the packaging bag, and the upper and lower sealers need to be heated, which may cause dimensional change, thereby possibly causing crushing of the surface film of the packaging bag.
(2) The continuously operated sealer has short contact time with the packaging bag in a working cycle period, so that the sealing position of the packaging bag is insufficiently heated, and the sealing is not completely sealed.
(3) And an additional pneumatic device and an electromagnetic device are required to be configured for the cutting action of the cutter, so that the cost of the sealing device is increased, the reliability is reduced, and the structure is complex.
(4) The eccentricity and the distance between the upper sealer and the lower sealer cannot be adjusted, the sealing device is difficult to adapt to products to be processed with different thicknesses and lengths, and the adaptability of the sealing device is low.
Disclosure of Invention
The invention mainly aims to solve the technical problems in the prior art and provide a sealing device for preventing a film on the surface of a packaging bag from being crushed.
Another main object of the present invention is to provide a packaging machine applying the above-mentioned closing device.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a sealing device comprises an upper sealing device and a lower sealing device which are engaged with each other, wherein a sealing device gap adjusting device used for keeping the gap of the upper sealing device and the lower sealing device unchanged when the upper sealing device and the lower sealing device are engaged is arranged on the upper sealing device and the lower sealing device.
Based on the technical scheme, the upper sealing device and the lower sealing device are easy to generate size change during heating and cooling, so that the gap is not fixed when the upper sealing device and the lower sealing device are engaged, the surface film of the packaging bag is possibly crushed, and the gap is kept unchanged during the engagement of the upper sealing device and the lower sealing device by arranging the gap adjusting device, so that the packaging bag is prevented from being crushed.
Further, the sealing device gap adjusting device is a sealing device gap adjusting block arranged on two sides of the meshing surface of the upper sealing device and the lower sealing device, the sealing device gap adjusting block is higher than the meshing surface of the upper sealing device and the lower sealing device, and the sealing device gap adjusting blocks arranged on the upper sealing device and the lower sealing device are contacted when the upper sealing device and the lower sealing device are meshed.
The sealing device gap adjusting block expands with heat and contracts with cold along with the upper sealing device and the lower sealing device, and the height difference between the sealing device gap adjusting block and the meshing surface of the sealing device is kept unchanged. Because the gap adjusting block of the sealing device is higher than the meshing surface of the sealing device, when the upper sealing device and the lower sealing device are meshed, the gap adjusting blocks of the sealing device of the upper sealing device and the lower sealing device are contacted, the gap of the meshing surface of the upper sealing device and the meshing surface of the lower sealing device are kept unchanged, the thickness of the sealed packaging bag is adapted, the packaging bag penetrates through the upper sealing device and the lower sealing device to be sealed under the gap meeting the process requirements, and the packaging bag is prevented from being crushed.
Further, a height adjusting device is arranged between the sealing device gap adjusting block and the upper sealing device and the lower sealing device;
the height adjusting device comprises an adjusting bolt penetrating through the meshing surface of the sealing device and a fixing nut fixed with the adjusting bolt, a wedge nut is sleeved on a screw rod of the adjusting bolt, and the bottom of the gap adjusting block of the sealing device is in contact with an inclined surface of the wedge nut.
For processing and sealing packaging bags with different thicknesses, the sealing device gap adjusting block can be replaced or adjusted through the height adjusting device to change the gap when the upper sealing device and the lower sealing device are meshed, so that the requirements of packaging bags with different thicknesses are met.
When the height is adjusted, the adjusting bolt is rotated, the wedge nut slides along with the adjusting bolt, and the sealing device gap adjusting block which is contacted with the inclined surface of the wedge nut can move up and down along with the adjusting bolt, so that the height of the sealing device gap adjusting block is adjusted. The structure of the adjusting bolt and the wedge block nut is adopted, the gap adjusting block of the sealing device can be finely adjusted, stepless adjustment is realized, and the accuracy of height adjustment is improved.
The upper sealer is fixed with the upper translational arm, the lower sealer is fixed with the lower translational arm, the upper sealer is connected with the upper translational arm in a sliding mode, the lower sealer is connected with the lower translational arm in a sliding mode, sealer pressure springs are arranged between the upper sealer and the upper translational arm and between the lower sealer and the lower translational arm, and the driving device drives the upper translational arm and the lower translational arm to move in a combined mode in the front-back direction and in the direction of approaching to and moving away from each other.
When the upper horizontal moving arm and the lower horizontal moving arm are close to each other, the upper sealer and the lower sealer are meshed, when the upper horizontal moving arm and the lower horizontal moving arm are further close to each other, the upper sealer and the upper horizontal moving arm slide relatively, the lower sealer and the lower horizontal moving arm slide relatively, the upper sealer and the lower sealer are enabled to be continuously meshed in the sliding process through the sealer pressure spring, the purpose of prolonging the contact time of the sealers and the packaging bags is achieved, and the reliability of packaging bag sealing is effectively improved.
Furthermore, the upper translational arm and the lower translational arm respectively comprise a parallelogram double-crank mechanism consisting of two cranks and parallel connecting rods, and crank adjusting devices for adjusting the lengths of the cranks are respectively arranged between the parallel connecting rods and driving shafts of the two cranks.
The parallelogram double-crank mechanism formed by the double cranks and the parallel connecting rods improves the rigidity and stability when continuously sealing the packaging bags, so that the sealing device realizes the action of driving the sealing device by the driving device on one side, has simple structure and small size space. The length of the crank is adjusted through the crank adjusting device, and the device is suitable for packaging bags with different thicknesses and lengths.
Further, crank adjusting device include with the fixed back mount pad of articulate drive shaft, with the fixed preceding mount pad of parallel link, preceding mount pad passes through crank fixing bolt with the back mount pad and fixes be provided with on the back mount pad and be used for the spout of crank fixing bolt's nut embedding be provided with on the preceding mount pad and be used for the screw rod sleeve that crank fixing bolt's screw rod passed screw rod sleeve tip is provided with and is used for fixing crank fixing bolt's nut be provided with intermeshing's dogtooth on preceding mount pad, the back mount pad respectively.
When the length of the crank is adjusted, the nut is unscrewed, the front mounting seat and the rear mounting seat are separated, the crank fixing bolt is driven by the screw rod sleeve to slide in the sliding groove, and the adjustment of the relative position of the front mounting seat and the rear mounting seat, namely the adjustment of the length of the crank, can be realized. Through this mounting structure, need not to lift preceding mount pad and parallel connecting rod off completely, convenient operation. The front and the rear mounting seats are provided with the convex teeth which are meshed with each other, so that the problem that the front and the rear mounting seats slide relatively due to acting force when the nut is not screwed down or the upper and the lower sealing devices are meshed can be effectively prevented, and the stability of the device is improved.
Further, spring guide columns are arranged on the upper sealer and the lower sealer, sealer sleeves used for inserting the spring guide columns are arranged on the upper translation arm and the lower translation arm, the spring pressing springs of the sealers are sleeved on the spring guide columns, and the end portions of the spring guide columns penetrate out of the sealer sleeves and are provided with adjusting nuts used for adjusting the meshing time of the upper sealer and the lower sealer. The shrinkage of the pressure spring of the sealing device is adjusted through the adjusting nut, namely the distance between the sealing device and the translation arm is adjusted, so that the morning and evening of the meshing time point of the upper sealing device and the lower sealing device are adjusted, and the contact time between the sealing device and the packaging bag required by different process requirements is adapted.
Further, a blade is embedded in the upper sealing device, and a blade telescopic device which presses the blade out of the upper sealing device and pulls the blade back to the upper sealing device through the action of an upper translation arm is arranged between the blade and the upper sealing device. The blade extends and retracts by adopting a mechanical structure form, so that the sealed packaging bag is cut apart in the closing process of the sealing device.
Further, the blade telescoping device include with go up two blade branch of sealer articulated, set up blade branch with go up the blade pressure spring between the sealer, the both ends of blade set up extension and two blade branch is articulated go up the flat movable arm and be provided with the portion that bulldozes that is used for bulldozing when last, lower sealer meshing blade extension's bulldozes.
When the upper and lower sealing devices are engaged, the blade is propped against the upper sealing device and does not slide along with the upper sealing device relative to the upper translation arm, so that the blade extends out of the upper sealing device, and when the upper and lower sealing devices are separated, the blade retracts into the upper sealing device through the blade pressure spring. The blade extends and retracts along with the action of the upper sealing device and the lower sealing device by arranging the supporting rod and the pressure spring, and an additional driving device is not required.
Further, the pushing part is provided with a threaded hole, a blade adjusting bolt for adjusting the extension amount of the blade is arranged in the threaded hole, and the end part of a screw rod of the blade adjusting bolt pushes and presses the extension part of the blade when the upper sealing device and the lower sealing device are meshed. By adjusting the blade adjusting bolt, the time point of pushing and pressing the blade can be adjusted to meet the process requirements of different sealing machine sizes and different contact time.
The other technical scheme of the invention is as follows:
a packaging machine comprises the sealing device.
In summary, the sealing device and the packaging machine using the sealing device solve the problems in the prior art, and the sealing device gap adjusting blocks are arranged on the upper sealing device and the lower sealing device, so that the packaging bag is prevented from being crushed. The contact time of the sealing device and the packaging bag is prolonged, the heating time of the sealing position of the packaging bag is sufficient, and the sealing quality is improved. The action driving of the sealer is carried out by adopting a parallelogram double-crank mechanism, so that the rigidity and the stability of the whole machine are improved. And an additional cutter action device is not required to be configured, so that the structure is simplified, and the cost is reduced. The eccentric amount is adjusted by arranging the crank adjusting device, so that the distance between the upper sealing device and the lower sealing device is adjusted, and the problem that products to be processed with different thicknesses and lengths are difficult to adapt to in the prior art is solved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the backside of FIG. 1;
FIG. 3 is a schematic view of the structure of the crank part of the present invention;
FIG. 4 is a schematic view of the construction of the sealer portion of the present invention;
fig. 5 is a schematic structural view of the sealing device gap adjusting apparatus of the present invention.
As shown in fig. 1 to 5, an upper sealing device 1, a lower sealing device 2, a sealing device pressure spring 3, a crank 4, a parallel link 5, a drive shaft 6, a transmission gear 7, a synchronous belt 8, a rear mounting seat 9, a front mounting seat 10, a crank fixing bolt 11, a chute 12, a screw sleeve 13, a convex tooth 14, a spring guide post 15, a sealing device positioning post 16, a sealing device sleeve 17, an extension portion 17-1, a pushing portion 17-2, an adjusting nut 18, a blade 19, an extension portion 19-1, a blade support rod 20, a blade pressure spring 21, a blade adjusting bolt 22, a heating device 23, a sealing device gap adjusting block 24, an adjusting bolt 25, a fixing nut 26, and a wedge nut 27.
Detailed Description
The invention is described in further detail below with reference to the following detailed description and accompanying drawings:
in order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
A sealing device is mainly applied to a packaging machine for sealing packaging bags, and the packaging machine mainly comprises a feeding device, a conveying device for conveying the packaging bags, a sealing device for sealing the packaging bags on the conveying device, a discharging device and the like.
As shown in fig. 1 and 4, the sealing device of the present invention includes an upper sealing device 1 and a lower sealing device 2 which are engaged with each other, and a heating device 23 is provided in the upper sealing device 1 and the lower sealing device 2, and the heating device 23 is used for heating the sealing devices, and the upper sealing device and the lower sealing device are likely to change in size when heated and cooled, and further, a gap between the upper sealing device and the lower sealing device is not constant when they are engaged with each other, which may cause crushing of a surface film of a packaging bag.
The upper sealer 1 and the lower sealer 2 are provided with sealer gap adjusting devices for keeping the gap constant when the upper sealer and the lower sealer are engaged. By arranging the gap adjusting device, the gap of the upper sealing device and the lower sealing device is kept unchanged during meshing, and the packaging bag is prevented from being damaged. Specifically, the sealer gap adjusting device is a sealer gap adjusting block 24 provided on both sides of the upper and lower sealer engaging surfaces, and the sealer gap adjusting block 24 is bolted and fixed to the upper and lower sealers. The sealing device gap adjusting block 24 is higher than the engaging surface of the upper sealing device and the lower sealing device, and the sealing device gap adjusting blocks 24 arranged on the upper sealing device and the lower sealing device are contacted when the upper sealing device and the lower sealing device are engaged.
The sealing device gap adjusting block 24 expands with heat and contracts with cold together with the upper sealing device 1 and the lower sealing device 2, and the height difference between the sealing device gap adjusting block 24 and the sealing device meshing surface is kept unchanged. Because the gap adjusting block of the sealing device is higher than the meshing surface of the sealing device, when the upper sealing device and the lower sealing device are meshed, the gap adjusting blocks 24 of the sealing device of the upper sealing device and the sealing device of the lower sealing device are contacted, the gap between the meshing surfaces of the upper sealing device and the lower sealing device is kept unchanged, and the sealing device adapts to the thickness of the sealed packaging bag. When the packaging bag is conveyed between the upper sealing device 1 and the lower sealing device 2 by a material conveying belt (not shown in the figure), the meshing surfaces of the upper sealing device and the lower sealing device are contacted with the packaging bag for sealing, and because the sealing device gap adjusting block 24 is arranged, the gap between the meshing surfaces of the upper sealing device and the lower sealing device is kept unchanged, the required gap for sealing the packaging bag is in accordance with the specification, and the product is prevented from being crushed.
As shown in fig. 5, a height adjusting device is provided between the sealer gap adjusting block 24 and the upper and lower sealers. The height adjusting device can adopt various adjusting devices, such as a gasket arranged between the adjusting block and the sealing device, a bolt arranged at the bottom of the sealing device and used for upwards propping against the adjusting block, and the like.
In this embodiment, the height adjusting means includes an adjusting bolt 25 penetrating the engaging surface of the sealer, and a fixing nut 26 fixed to the adjusting bolt 25, a wedge nut 27 is fitted over a screw of the adjusting bolt 25, and the bottom of the sealer gap adjusting block 24 is in contact with an inclined surface of the wedge nut 27. Specifically, a cavity is arranged in the sealing device and used for accommodating a screw rod of the adjusting bolt 25 and a wedge nut 27, the bottom of the wedge nut 27 is tightly attached to the inner wall of the cavity, and two sides of the wedge nut 27 are spaced from the inner cavity wall of the sealing device by a certain distance and used for having enough space to carry out translation. The bottom of the sealer clearance adjusting block 24 extends downward to contact the inclined surface of the wedge nut 27, and the portion of the sealer clearance adjusting block 24 that contacts the bottom is also provided as an inclined surface.
For processing and sealing packaging bags with different thicknesses, the sealing machine gap adjusting block 24 can be replaced or adjusted through a height adjusting device to change the gap when the upper sealing machine and the lower sealing machine are meshed, so that the requirements of packaging bags with different thicknesses are met.
When the height is adjusted, the adjustment bolt 25 is rotated, the wedge nut 27 slides with the rotation of the adjustment bolt 25, and the sealer gap adjustment block 24 that is in contact with the inclined surface of the wedge nut 27 moves up and down with the rotation, thereby adjusting the height of the sealer gap adjustment block 24. By adopting the structure of the adjusting bolt 25 and the wedge nut 27, the gap adjusting block 24 of the sealing device can be finely adjusted, and the accuracy of height adjustment is improved because the gap adjusting block is adjusted steplessly.
In order to realize the self-locking of the wedge nut 27, the inclined surface of the wedge nut 27 forms an angle of less than 5 degrees with the plane.
As shown in fig. 1, the sealing device of the present invention further includes an upper translational arm, a lower translational arm, and a driving device. The upper sealing device 1 is fixed with the upper translational arm, and the lower sealing device 2 is fixed with the lower translational arm. The upper sealing device 1 is connected with the upper translational arm in a sliding mode, the lower sealing device 2 is connected with the lower translational arm in a sliding mode, and sealing device pressure springs 3 are arranged between the upper sealing device 1 and the upper translational arm and between the lower sealing device 2 and the lower translational arm. The driving device drives the upper translational arm and the lower translational arm to do compound movement in the directions of mutual approaching, separating and back-and-forth.
When the upper horizontal moving arm and the lower horizontal moving arm are close to each other, the upper sealer 1 and the lower sealer 2 are close to each other and then meshed, when the upper horizontal moving arm and the lower horizontal moving arm are further close to each other, the upper sealer 1 and the upper horizontal moving arm slide relatively, the lower sealer 2 and the lower horizontal moving arm slide relatively, the upper sealer and the lower sealer are enabled to be continuously meshed in the sliding process through the sealer pressure spring 3, the purpose of prolonging the contact time of the sealers and the packaging bags is achieved, and the reliability of sealing of the packaging bags is effectively improved.
The upper horizontal movable arm and the lower horizontal movable arm respectively comprise a parallelogram double-crank mechanism consisting of two cranks 4 and a parallel connecting rod 5, and the cranks 4 of the upper horizontal movable arm and the lower horizontal movable arm have opposite rotating directions to form compound motions of approaching and departing from each other and front and back directions between the upper horizontal movable arm and the lower horizontal movable arm. The parallelogram double-crank mechanism consisting of the double cranks and the parallel connecting rods 5 improves the stability of the device when continuously sealing the packaging bags, so that the sealing device realizes the action of driving the sealing device by the driving device on one side, and has simple structure and small size space.
As shown in fig. 2, the driving means comprises four driving shafts 6 connected with four cranks 4, two transmission gears 7 engaged with each other. The two driving shafts 6 of the upper horizontal moving arm are linked through a synchronous belt 8, and the two driving shafts 6 of the lower horizontal moving arm are also linked through the synchronous belt 8. Two transmission gears 7 are coaxially fixed with the driving shaft 6 on the same side of the upper translational arm and the lower translational arm respectively. The four driving shafts 6 can be used as driving shafts, and in the embodiment, the driving shaft 6 selected from the lower right corner in fig. 2 is connected with the output end of a driving motor (not shown in the figure).
As shown in fig. 3, the parallel links 5, a front mount 10 of the crank 4, are hidden in fig. 3 for ease of understanding. Crank adjusting devices for adjusting the crank length are respectively arranged between the parallel connecting rods 5 and the driving shafts 6 of the two cranks 4.
The crank adjusting device comprises a rear mounting seat 9 fixed with the driving shaft 6 of the crank 4 and a front mounting seat 10 fixed with the parallel connecting rod 5, and the front mounting seat 10 and the rear mounting seat 9 are fixed through a crank fixing bolt 11. A sliding groove 12 for embedding a nut of the crank fixing bolt 11 is arranged on the rear mounting seat 9, a screw sleeve 13 for penetrating a screw of the crank fixing bolt 11 is arranged on the front mounting seat 9, and a nut for fixing the crank fixing bolt 11 is arranged at the end part of the screw sleeve 13. The parallel connecting rod 5 is provided with a sleeve, and the parallel connecting rod 5 and the front mounting seat 10 are fixed after the screw sleeve 13 is sleeved in the sleeve. The front mounting seat 10 and the rear mounting seat 9 are respectively provided with convex teeth 14 which are meshed with each other.
The length of the crank 4 is adjusted through the crank adjusting device, namely the amplitude of the motion track of the upper sealing device and the lower sealing device or the distance between the upper sealing device and the lower sealing device is adjusted, and the sealing device is suitable for sealing packaging bags with different thicknesses and lengths. When the length of the crank 4 is adjusted, the nut is unscrewed, the front mounting seat and the rear mounting seat are separated, the crank fixing bolt 11 is driven by the screw sleeve 13 to slide in the sliding groove 12, and the adjustment of the relative position of the front mounting seat and the rear mounting seat, namely the adjustment of the length of the crank 4, can be realized. By the mounting structure, the front mounting seat 10 and the parallel connecting rod 5 do not need to be completely dismounted, and the operation is convenient. The front and rear mounting seats are provided with the mutually meshed convex teeth 14, so that the problem that the front and rear mounting seats slide relatively due to acting force when the nut is not screwed down or the upper and lower sealing devices are meshed can be effectively prevented, and the stability of the device is improved.
As shown in fig. 4, a spring guide post 15 and two sealer positioning posts 16 are provided on both the upper sealer 1 and the lower sealer 2, a sealer sleeve 17 for inserting the spring guide post 15 is provided at the end of the parallel link 5 of the upper and lower translational arms, extension portions 17-1 are provided at both sides of the sealer sleeve 17, a through hole for inserting the sealer positioning post 16 is provided on the extension portion 17-1, and a sealer compression spring 3 is fitted over the spring guide post 15.
The end of the spring guide post 15 protrudes through the sealer sleeve 17 and is provided with an adjusting nut 18 for adjusting the time of engagement of the upper and lower sealers. The shrinkage of the sealing device pressure spring 3 is adjusted through the adjusting nut 18, namely the distance between the sealing device and the translation arm is adjusted, so that the morning and evening of the meshing time point of the upper sealing device and the lower sealing device are adjusted, and the contact time between the sealing device and the packaging bag required by different process requirements is adapted.
A blade 19 is embedded in the upper sealer 1, and a blade extension device which pushes the blade 19 out of the upper sealer 1 by the operation of the upper translation arm and pulls the blade 19 back to the upper sealer 1 is provided between the blade 19 and the upper sealer 1. The blade extends and retracts by adopting a mechanical structure form, so that the sealed packaging bag is cut apart in the closing process of the sealing device.
Specifically, the blade extension and retraction device comprises two blade support rods 20 hinged with the upper sealing device 1 and a blade pressure spring 21 arranged between the blade support rods 20 and the upper sealing device 1, two ends of a blade 19 are provided with extending parts 19-1 hinged with the two blade support rods 20, and a pushing part 17-2 used for pushing the blade extending parts 19-1 when the upper sealing device is meshed with the lower sealing device is arranged on the sealing device sleeve 17. When the upper and lower sealing devices are engaged, the blade 19 is pressed by the pressing part 17-2 and does not slide along with the upper sealing device relative to the upper translation arm, so that the blade 19 extends out of the upper sealing device, and when the upper and lower sealing devices are separated, the blade 19 retracts into the upper sealing device 1 through the blade pressure spring 21. The blade 19 extends and retracts along with the action of the upper sealing device and the lower sealing device by arranging the supporting rod and the pressure spring, and an additional driving device is not required.
The pushing portion 17-2 is provided with a threaded hole in which a blade adjusting bolt 22 for adjusting the amount of extension of the blade 19 is provided, and the end of the screw of the blade adjusting bolt 22 pushes the blade extension portion 19-1 when the upper and lower sealers are engaged. By adjusting the blade adjusting bolt 22, the time point when the blade 19 is pushed can be adjusted to meet the process requirements of different sealer sizes and different contact times.
The sealing device and the packaging machine applying the sealing device solve the problems in the prior art, and the sealing device gap adjusting blocks are arranged on the upper sealing device and the lower sealing device, so that the packaging bag is prevented from being crushed. The contact time of the sealing device and the packaging bag is prolonged, the heating time of the sealing position of the packaging bag is sufficient, and the sealing quality is improved. The action driving of the sealer is carried out by adopting a parallelogram double-crank mechanism, so that the rigidity and the stability of the whole machine are improved. And an additional cutter action device is not required to be configured, so that the structure is simplified, and the cost is reduced. The eccentric amount is adjusted by arranging the crank adjusting device, so that the distance between the upper sealing device and the lower sealing device is adjusted, and the problem that products to be processed with different thicknesses and lengths are difficult to adapt to in the prior art is solved.
Similar solutions can be derived from the solution given in the figures, as described above. However, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the scope of the technical solution of the present invention.
Claims (11)
1. The utility model provides a closing device, includes engaged with last sealer, lower sealer which characterized in that: and the upper sealing device and the lower sealing device are provided with sealing device gap adjusting devices for keeping the gap unchanged when the upper sealing device and the lower sealing device are meshed.
2. A closure as claimed in claim 1, wherein: the sealing device gap adjusting device is a sealing device gap adjusting block arranged on two sides of the meshing surface of the upper sealing device and the lower sealing device, the sealing device gap adjusting block is higher than the meshing surface of the upper sealing device and the lower sealing device, and the sealing device gap adjusting blocks arranged on the upper sealing device and the lower sealing device are contacted when the upper sealing device and the lower sealing device are meshed.
3. A closure as claimed in claim 2, wherein: a height adjusting device is arranged between the sealing device gap adjusting block and the upper sealing device and the lower sealing device;
the height adjusting device comprises an adjusting bolt penetrating through the meshing surface of the sealing device and a fixing nut fixed with the adjusting bolt, a wedge nut is sleeved on a screw rod of the adjusting bolt, and the bottom of the gap adjusting block of the sealing device is in contact with an inclined surface of the wedge nut.
4. A closure as claimed in any one of claims 1 to 3, wherein: the upper sealing device is fixed with the upper translational arm, the lower sealing device is fixed with the lower translational arm, the upper sealing device is connected with the upper translational arm in a sliding mode, the lower sealing device is connected with the lower translational arm in a sliding mode, sealing device pressure springs are arranged between the upper sealing device and the upper translational arm and between the lower sealing device and the lower translational arm, and the driving device drives the upper translational arm and the lower translational arm to move in a combined mode in the forward and backward directions and approach to each other.
5. A closure as claimed in claim 4, in which: the upper horizontal movable arm and the lower horizontal movable arm respectively comprise a parallelogram double-crank mechanism consisting of two cranks and parallel connecting rods, and crank adjusting devices for adjusting the lengths of the cranks are respectively arranged between the parallel connecting rods and driving shafts of the two cranks.
6. A closure as claimed in claim 5, wherein: crank adjusting device include with the fixed back mount pad of articulate drive shaft, with the fixed preceding mount pad of parallel link, preceding mount pad passes through crank fixing bolt with the back mount pad and fixes being provided with on the back mount pad and being used for the spout of crank fixing bolt's nut embedding be provided with on the preceding mount pad and be used for the screw rod sleeve that crank fixing bolt's screw rod passed screw rod sleeve tip is provided with and is used for fixing crank fixing bolt's nut be provided with intermeshing's dogtooth on preceding mount pad, the back mount pad respectively.
7. A closure as claimed in claim 4, in which: the upper sealer and the lower sealer are both provided with spring guide columns, the upper translation arm and the lower translation arm are both provided with sealer sleeves into which the spring guide columns are inserted, the sealer pressure spring sleeves are sleeved on the spring guide columns, and the end parts of the spring guide columns penetrate out of the sealer sleeves and are provided with adjusting nuts used for adjusting the meshing time of the upper sealer and the lower sealer.
8. A closure as claimed in any one of claims 1 to 3, wherein: a blade is embedded in the upper sealing device, and a blade telescopic device which presses the blade out of the upper sealing device and pulls the blade back to the upper sealing device through the action of an upper translation arm is arranged between the blade and the upper sealing device.
9. A closure as claimed in claim 8, wherein: the blade telescoping device include with two blade branch, the setting of going up sealer articulated are in blade branch with go up the blade pressure spring between the sealer, the both ends of blade set up extension and two blade branch is articulated go up flat movable arm and be provided with on and be used for bulldozing when last, lower sealer meshing the portion that bulldozes of blade extension.
10. A closure as claimed in claim 9, wherein: the pushing and pressing part is provided with a threaded hole, a blade adjusting bolt used for adjusting the extension amount of the blade is arranged in the threaded hole, and the end part of a screw rod of the blade adjusting bolt pushes and presses the extension part of the blade when the upper sealing device and the lower sealing device are meshed.
11. A packaging machine characterized by: a closure comprising a closure as claimed in any one of claims 1 to 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN110723363A (en) * | 2019-10-11 | 2020-01-24 | 李志宏 | Packaging sealing device and packaging machine applying same |
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| CN110723362B (en) | 2021-12-17 |
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