CN112026277A - Crawler belt type pressing and pasting equipment for producing large-size staggered double corrugated paperboard core layers - Google Patents
Crawler belt type pressing and pasting equipment for producing large-size staggered double corrugated paperboard core layers Download PDFInfo
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- CN112026277A CN112026277A CN202010925221.5A CN202010925221A CN112026277A CN 112026277 A CN112026277 A CN 112026277A CN 202010925221 A CN202010925221 A CN 202010925221A CN 112026277 A CN112026277 A CN 112026277A
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- conveying belt
- corrugated paper
- corrugated
- paper
- belt
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- 238000003825 pressing Methods 0.000 title claims abstract description 30
- 239000012792 core layer Substances 0.000 title claims abstract description 17
- 239000011087 paperboard Substances 0.000 title description 7
- 239000003292 glue Substances 0.000 claims abstract description 15
- 238000004519 manufacturing process Methods 0.000 claims abstract description 8
- 239000000123 paper Substances 0.000 claims description 161
- 239000011111 cardboard Substances 0.000 claims description 7
- 238000010030 laminating Methods 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 238000004049 embossing Methods 0.000 claims 1
- 238000010924 continuous production Methods 0.000 abstract description 2
- 239000002994 raw material Substances 0.000 description 17
- 241000219098 Parthenocissus Species 0.000 description 7
- 239000010410 layer Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 238000003892 spreading Methods 0.000 description 4
- 230000003578 releasing effect Effects 0.000 description 2
- 210000003462 vein Anatomy 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
- B31F1/20—Corrugating; Corrugating combined with laminating to other layers
- B31F1/24—Making webs in which the channel of each corrugation is transverse to the web feed
- B31F1/26—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions
- B31F1/28—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions combined with uniting the corrugated webs to flat webs ; Making double-faced corrugated cardboard
- B31F1/2813—Making corrugated cardboard of composite structure, e.g. comprising two or more corrugated layers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
- B31F1/20—Corrugating; Corrugating combined with laminating to other layers
- B31F1/24—Making webs in which the channel of each corrugation is transverse to the web feed
- B31F1/30—Tools secured to endless chains, e.g. toothed belts; combined with uniting the corrugated web to flat webs
Abstract
The invention relates to the technical field of corrugated board production equipment; the crawler belt type pressing and pasting equipment for producing the large-size staggered double-corrugated-board core layer comprises a main crawler belt conveyer belt, a first corrugated-paper upper die conveyer belt, a second corrugated-paper lower die conveyer belt, a second corrugated-paper upper die conveyer belt, a core paper guide roller and a glue spreader; a first corrugated paper upper die conveying belt is arranged above the front part of the main track shoe conveying belt, a second corrugated paper lower die conveying belt is arranged above the rear part of the main track shoe conveying belt, and a second corrugated paper upper die conveying belt is arranged above the second corrugated paper lower die conveying belt; the invention provides crawler belt type staggered double-corrugated-board core layer pressing equipment, which realizes continuous production of staggered double-corrugated boards through the path difference design of longitudinal corrugated paper and transverse corrugated paper, wherein the longitudinal dimension of a product is not limited, and the transverse dimension of the product is only limited by the width of the equipment.
Description
The technical field is as follows:
the invention relates to the technical field of corrugated board production equipment.
Background art:
corrugated board, also known as corrugated board, is made by bonding at least one layer of corrugated paper and one layer of linerboard paper, has good elasticity and mechanical strength, and is widely applied to packaging, shock absorption, sound insulation and decoration.
The corrugated board has great difference in mechanical strength in different directions due to the determined corrugated direction, and the mechanical strength of the corrugated board in different directions tends to be average by staggering the corrugated direction of each layer of corrugated board in the multi-layer corrugated board. Because the traditional roller type corrugated paper production equipment needs to bend the raw materials for many times, but the non-transverse corrugated paper is not suitable for the equipment of the type, the multi-layer corrugated paper with staggered corrugated directions is produced in a mode of pressing and attaching piece by intermittent feeding, the production efficiency is low, and the size of a corrugated paper board product is severely limited.
The invention content is as follows:
in view of the above, there is a need for an apparatus that can continuously produce staggered double corrugated cardboard and free the limitation of the size of the staggered double corrugated cardboard product in at least one direction.
A caterpillar band plate formula is pressed and is pasted equipment for production of crisscross two corrugated sheet sandwich layers of jumbo size, including main caterpillar band plate conveyer belt, first corrugated paper mould conveyer belt, second corrugated paper lower mould conveyer belt, second corrugated paper mould conveyer belt, core paper guide roller and glue spreader.
The main track shoe conveying belt, the first corrugated paper upper die conveying belt, the second corrugated paper lower die conveying belt and the second corrugated paper upper die conveying belt are formed by sequentially splicing track shoes, hinges of the main track shoe conveying belt and the first corrugated paper upper die conveying belt are located on the side, away from the working face, of each track shoe, and when the adjacent track shoes are unfolded, the working faces of the adjacent track shoes are spliced to be flat.
The upper die conveying belt for the corrugated board is characterized in that a first corrugated paper upper die conveying belt is arranged above the front portion of the main track board conveying belt, the working surface of the lower portion of the first corrugated paper upper die conveying belt is in close contact with the working surface of the upper portion of the main track board conveying belt, and longitudinal corrugated pressing lines buckled with each other at the close contact sections of the working surfaces are arranged on the main track board conveying belt and the working surface of the first corrugated paper upper die conveying belt.
The second corrugated paper lower die conveying belt is installed above the rear portion of the main track shoe conveying belt, the lower working face of the second corrugated paper lower die conveying belt is in close contact with the upper working face of the main track shoe conveying belt, the second corrugated paper upper die conveying belt is installed above the second corrugated paper lower die conveying belt, and transverse corrugated pressing lines buckled with each other at the close contact sections of the working faces are arranged on the working faces of the second corrugated paper lower die conveying belt and the second corrugated paper upper die conveying belt.
And a core paper guide roller is arranged above the middle part of the main track shoe conveying belt and is in close contact with the working surface on the upper part of the main track shoe conveying belt.
The glue spreader is provided with two glue spreader rollers which are respectively arranged on the working surface of the main track shoe conveyer belt between the first corrugated paper upper mould conveyer belt and the core paper guide roller and the side surface of the second corrugated paper lower mould conveyer belt facing to one side of the core paper guide roller.
When the corrugated board conveying belt works, the right view is used as a reference for description, the main track board conveying belt and the second corrugated paper upper die conveying belt rotate clockwise, the first corrugated paper upper die conveying belt and the second corrugated paper lower die conveying belt rotate anticlockwise, and the rotating linear speeds of all the conveying belts are the same. The raw material paper is divided into three parts, wherein the first raw material paper is input from the left side of the contact part of the main track shoe conveying belt and the first corrugated paper upper die conveying belt, is matched and pressed into longitudinal corrugated paper by longitudinal corrugated pressing lines on the working surfaces of the main track shoe conveying belt and the first corrugated paper upper die conveying belt, and then is glued at a glue spreading roller; the second raw material paper is guided in by the core paper guide roller and is bonded with the glued longitudinal corrugated paper; the third raw material paper is input from the right side of the contact part of the second corrugated paper upper die conveying belt and the second corrugated paper lower die conveying belt, the second corrugated paper upper die conveying belt and the transverse corrugated pressing veins on the working surface of the second corrugated paper lower die conveying belt are matched and pressed into transverse corrugated paper, and the transverse corrugated paper is turned downwards along with the counterclockwise turning of the second corrugated paper lower die conveying belt and is glued through a glue spreading roller, so that the second raw material paper which is glued with the longitudinal corrugated paper is contacted and glued with the contact part of the second corrugated paper lower die conveying belt and the main track board conveying belt, and the staggered double corrugated board core layer of the longitudinal corrugated paper is.
In the structure, the corrugation direction of the longitudinal corrugated paper is not suitable for curling, so that the longitudinal corrugated paper is output by equipment after being pressed and formed until the staggered double corrugated paperboard core layers are produced, and the longitudinal corrugated paper is conveyed linearly by the main track shoe conveying belt without turning; the transverse corrugated paper is suitable for curling after being pressed and formed, has longitudinal elasticity, and can be buckled and captured again by the working surface of the second corrugated lower die conveying belt in the process of approaching the main track shoe conveying belt after being turned along with the second corrugated lower die conveying belt, so that the pressed corrugated corrugations of the transverse corrugated paper cannot be damaged in the process.
In order to ensure that each track plate structure can still be tightly attached under the production tolerance, preferably, the side surface of each track plate is provided with a hook-and-loop connecting pair, and when the track plates are in a contact state with the upper working surface and the lower working surface, the hook-and-loop connecting pair locks the upper track plate and the lower track plate to tightly connect the upper track plate and the lower track plate. Meanwhile, the hook-and-loop connecting pair can also ensure that all the track shoes move synchronously, so that the working surfaces are aligned when being attached.
Furthermore, the side face of the track shoe is provided with a hinge hole, hinge hooks are arranged at the hinge hole positions on the side faces of the track shoe of the first corrugated paper upper die conveying belt and the second corrugated paper lower die conveying belt, a control slide rail matched with the hinge hooks is arranged, and hinge buckles are arranged at the hinge hole positions on the side faces of the track shoe of the main track shoe conveying belt and the second corrugated paper upper die conveying belt. Furthermore, the hinge hook is a C-shaped hook, one end of the hinge hook is provided with a hinge shaft which is hinged with the hinge hole, the other end of the hinge hook is a working surface which is matched with the hinge buckle, the middle section of the hinge hook is hinged with a control shifting fork, and the control shifting fork is occluded on the control slide rail. In the working process, the shifting fork is controlled to move up and down along with the control slide rail relative to the track shoe, the hinge hook is driven to rotate around the hinge shaft, and the fastening and releasing actions of the hinge buckle are realized.
Preferably, the design further comprises a first corrugated paper pre-pressing device, the first corrugated paper pre-pressing device is a plurality of rotating wheels which are arranged in a vertically staggered mode, the wheel spacing of the first corrugated paper pre-pressing device is the same as the peak-valley spacing of the longitudinal corrugated pressing veins, and the first corrugated paper pre-pressing device is arranged in an inclined or V-shaped mode in a plan view. The structure can enable the first raw material paper to be pre-pressed before entering the longitudinal corrugated pressing lines, the transverse size of the first raw material paper is shrunk to obtain elasticity, and the first raw material paper is prevented from being torn directly due to the fact that the track shoe is buckled and pressed at an excessively high speed.
The invention provides crawler belt type staggered double-corrugated-board core layer pressing equipment, which realizes continuous production of staggered double-corrugated boards through the path difference design of longitudinal corrugated paper and transverse corrugated paper, wherein the longitudinal dimension of a product is not limited, and the transverse dimension of the product is only limited by the width of the equipment.
Description of the drawings:
FIG. 1 is a schematic structural view of a specific embodiment of the track plate type pressing and pasting equipment for producing large-size staggered double corrugated board core layers;
FIG. 2 is a schematic view of a partial structure of a bonding part of a working surface of a track shoe in a specific embodiment of the track shoe pressing and bonding equipment for producing large-size staggered double corrugated paperboard core layers;
FIG. 3 is a schematic view of a side view of a part of a working surface joint of a track shoe of a specific embodiment of the track shoe press-fitting device for producing large-sized staggered double corrugated cardboard cores, wherein a hook-lock connecting pair is in a fastened state;
FIG. 4 is a schematic view of a side view of a part of a bonding part of a working surface of a track shoe in a specific embodiment of the track shoe pressing and bonding device for producing large-size staggered double corrugated paperboard core layers, wherein a hook-lock connecting pair is in a release state;
FIG. 5 is a schematic structural view of a first corrugated paper prepressing device of a specific embodiment of the caterpillar band plate type laminating apparatus for producing large-size staggered double corrugated board core layers according to the present invention;
fig. 6 is a schematic top view structure diagram of a first corrugated paper prepressing device of a specific embodiment of the caterpillar band plate type laminating device for producing large-size staggered double corrugated board core layers.
In the figure: the corrugated paper pre-pressing device comprises a main track shoe conveying belt 1, a first corrugated paper upper die conveying belt 2, a second corrugated paper lower die conveying belt 3, a second corrugated paper upper die conveying belt 4, a core paper guide roller 5, a glue coating roller 6, a hinge 701, a hinge hook 702, a control slide rail 703, a hinge buckle 704, a hinge shaft 705, a control shifting fork 706, a first corrugated paper pre-pressing device 8 and a rotating wheel 801.
The specific implementation mode is as follows:
a caterpillar band plate formula is pressed and is pasted equipment for production of crisscross two corrugated sheet sandwich layers of jumbo size, including main caterpillar band plate conveyer belt 1, first corrugated paper mould conveyer belt 2, second corrugated paper lower mould conveyer belt 3, second corrugated paper mould conveyer belt 4, core paper guide roll 5 and glue spreader 6.
The main track shoe conveying belt 1, the first corrugated paper upper die conveying belt 2, the second corrugated paper lower die conveying belt 3 and the second corrugated paper upper die conveying belt 4 are formed by splicing track shoes which are sequentially hinged, the hinges 701 of the main track shoe conveying belt are located on the side, away from the working face, of each track shoe, and when the adjacent track shoes are unfolded, the working faces of the adjacent track shoes are spliced to be flat.
A first corrugated paper upper die conveying belt 2 is installed above the front portion of the main track shoe conveying belt 1, the working face of the lower portion of the first corrugated paper upper die conveying belt 2 is in close contact with the working face of the upper portion of the main track shoe conveying belt 1, and longitudinal corrugated pressing lines buckled with each other at the close contact section of the working faces are arranged on the working faces of the main track shoe conveying belt 1 and the first corrugated paper upper die conveying belt 2.
Second corrugated paper lower mould conveyer belt 3 is installed to 1 rear portion top of main track board conveyer belt, and the working face of 3 lower parts of second corrugated paper lower mould conveyer belt and the 1 upper portion working face in close contact with of main track board conveyer belt, and mould conveyer belt 4 on the installation second corrugated paper is installed to 3 tops of second corrugated paper lower mould conveyer belt, is provided with the horizontal flute suppression line of the mutual lock in working face in close contact with section on second corrugated paper lower mould conveyer belt 3 and the 4 working faces of second corrugated paper upper mould conveyer belt.
The side surfaces of the creeper treads are provided with the hook-and-buckle connecting pairs, when the creeper treads are in a contact state with the upper working surface and the lower working surface, the hook-and-buckle connecting pairs lock the upper creeper tread and the lower creeper tread to enable the upper creeper tread and the lower creeper tread to be tightly connected, and the hook-and-buckle connecting pairs can also ensure that all the creeper treads synchronously move to enable the working surfaces to be aligned when being attached.
The side surface of the track shoe is provided with a hinge hole, the hinge hooks 702 are arranged at the hinge hole positions on the side surfaces of the track shoe of the first corrugated paper upper die conveying belt 2 and the second corrugated paper lower die conveying belt 3, a control slide rail 703 matched with the hinge hooks is arranged, and the hinge buckles 704 are arranged at the hinge hole positions on the side surfaces of the track shoe of the main track shoe conveying belt 1 and the second corrugated paper upper die conveying belt 4.
The hinge hook 702 is a C-shaped hook, one end of the hinge hook is provided with a hinge shaft 705 hinged with a hinge hole, the other end of the hinge hook is a working surface matched with a hinge buckle, the middle section of the hinge hook 702 is hinged with a control shifting fork 706, and the control shifting fork 706 is meshed on the control slide rail 703. In the working process, the shifting fork 706 moves up and down along with the control slide rail 703 relative to the track shoe to drive the hinge hook 702 to rotate around the hinge shaft 705, so that the fastening and releasing actions of the hinge buckle 704 are realized.
A core paper guide roller 5 is arranged above the middle part of the main track shoe conveying belt 1, and the core paper guide roller 5 is in close contact with the working surface of the upper part of the main track shoe conveying belt 1.
The glue spreading rollers 6 are respectively arranged on the working surface of the main track shoe conveyer belt 1 between the first corrugated paper upper die conveyer belt 2 and the core paper guide roller 5 and the side surface of the second corrugated paper lower die conveyer belt 3 facing to one side of the core paper guide roller 5.
This design still includes first corrugated paper preloading device 8, and first corrugated paper preloading device is a plurality of runners 801 of staggered arrangement from top to bottom, and its wheel interval is the same with vertical flute pressing line peak-valley interval, and it arranges for the V type on the plan view. The structure can enable the first raw material paper to be pre-pressed before entering the longitudinal corrugated pressing lines, the transverse size of the first raw material paper is shrunk to obtain elasticity, and the first raw material paper is prevented from being torn directly due to the fact that the track shoe is buckled and pressed at an excessively high speed.
When the corrugated board conveying belt works, the right view is used as a reference for description, the main track board conveying belt 1 and the second corrugated paper upper die conveying belt 4 rotate clockwise, the first corrugated paper upper die conveying belt 2 and the second corrugated paper lower die conveying belt 3 rotate anticlockwise, and the rotating linear speeds of all the conveying belts are the same. The raw material paper is divided into three parts, wherein the first raw material paper is input from the left side of the contact part of the main track shoe conveyer belt 1 and the first corrugated paper upper die conveyer belt 2, is matched and pressed into longitudinal corrugated paper by longitudinal corrugated pressing lines on the working surfaces of the main track shoe conveyer belt 1 and the first corrugated paper upper die conveyer belt 2, and then is glued at a glue spreading roller 6; the second raw material paper is guided in by the core paper guide roller 5 and is bonded with the glued longitudinal corrugated paper; the third raw material paper is input from the right side of the contact part of the second corrugated paper upper die conveying belt 4 and the second corrugated paper lower die conveying belt 3, the second corrugated paper upper die conveying belt 4 and the transverse corrugated pressing lines on the working surface of the second corrugated paper lower die conveying belt 3 are matched and pressed into transverse corrugated paper, the transverse corrugated paper is turned downwards along with the counterclockwise direction of the second corrugated paper lower die conveying belt 3, glue is coated when passing through a glue coating roller 6, and then the second raw material paper which is bonded with longitudinal corrugated paper is contacted and bonded with the contact part of the second corrugated paper lower die conveying belt 3 and the main track board conveying belt 1, and a staggered double-corrugated-board core layer of the.
In the structure, the longitudinal corrugated paper is not suitable for curling in the corrugation direction, so that the longitudinal corrugated paper is conveyed in a straight line by the main track shoe conveyer belt 1 without turning after being pressed and formed until the staggered double corrugated paper board core layers are produced and output by equipment; the transverse corrugated paper is suitable for curling after being pressed and formed, has longitudinal elasticity, and can be buckled and captured again by the working surface of the second lower corrugated paper die conveying belt 3 in the process of approaching the main track shoe conveying belt 1 after being turned along with the second lower corrugated paper die conveying belt 3, so that the pressed corrugated corrugations of the transverse corrugated paper cannot be damaged in the process.
Claims (5)
1. The crawler belt type pressing and pasting equipment for producing the large-size staggered double corrugated board core layer is characterized by comprising a main crawler belt conveyer belt, a first corrugated paper upper die conveyer belt, a second corrugated paper lower die conveyer belt, a second corrugated paper upper die conveyer belt, a core paper guide roller and a glue coating roller;
the main track shoe conveying belt, the first corrugated paper upper die conveying belt, the second corrugated paper lower die conveying belt and the second corrugated paper upper die conveying belt are formed by splicing track shoes which are sequentially hinged, hinges of the main track shoe conveying belt, the first corrugated paper upper die conveying belt and the second corrugated paper upper die conveying belt are located on the side, away from the working face, of each track shoe, and when the adjacent track shoes are flattened, the working faces of the adjacent track shoes are spliced into flat planes;
a first corrugated paper upper die conveying belt is arranged above the front part of the main track shoe conveying belt, the working surface of the lower part of the first corrugated paper upper die conveying belt is in close contact with the working surface of the upper part of the main track shoe conveying belt, and longitudinal corrugated pressing lines which are mutually buckled at the close contact section of the working surfaces are arranged on the main track shoe conveying belt and the working surface of the first corrugated paper upper die conveying belt;
a second lower corrugated paper die conveying belt is arranged above the rear part of the main track shoe conveying belt, the lower working surface of the second lower corrugated paper die conveying belt is in close contact with the upper working surface of the main track shoe conveying belt, a second upper corrugated paper die conveying belt is arranged above the second lower corrugated paper die conveying belt, and transverse corrugated pressing lines which are mutually buckled at the close contact section of the working surfaces are arranged on the second lower corrugated paper die conveying belt and the working surface of the second upper corrugated paper die conveying belt;
a core paper guide roller is arranged above the middle part of the main track shoe conveying belt and is in close contact with the working surface of the upper part of the main track shoe conveying belt;
the glue spreader is provided with two glue spreader rollers which are respectively arranged on the working surface of the main track shoe conveyer belt between the first corrugated paper upper mould conveyer belt and the core paper guide roller and the side surface of the second corrugated paper lower mould conveyer belt facing to one side of the core paper guide roller.
2. The track plate type laminating apparatus for manufacturing large-sized staggered double corrugated cardboard cores according to claim 1, wherein the track plate is provided with a pair of hook and loop fasteners on the side surface, and when the track plate is in a state of contact with the upper and lower working surfaces, the pair of hook and loop fasteners lock the upper and lower track plates to be tightly connected.
3. The track pad type pressing and pasting device for producing the large-size staggered double corrugated cardboard core layer as claimed in claim 2, wherein the track pad is provided with a hinge hole on the side surface, a hinge hook is arranged at the hinge hole on the side surface of the track pad of the first upper corrugated paper mold conveying belt and the second lower corrugated paper mold conveying belt, a control slide rail matched with the hinge hook is arranged, and a hinge buckle is arranged at the hinge hole on the side surface of the track pad of the main track pad conveying belt and the second upper corrugated paper mold conveying belt.
4. The track plate type laminating apparatus for producing large-size staggered double corrugated cardboard core layers according to claim 3, wherein the hinge hook is a C-shaped hook, one end of the hinge hook is provided with a hinge shaft hinged with the hinge hole, the other end of the hinge hook is a working surface matched with the hinge buckle, the middle section of the hinge hook is hinged with a control shifting fork, and the control shifting fork is occluded on the control slide rail.
5. The caterpillar board type laminating apparatus for producing large-size staggered double corrugated cardboard core according to claim 1, further comprising a first corrugated paper prepressing device, wherein the first corrugated paper prepressing device is a plurality of rotating wheels staggered up and down, the wheel pitch of the first corrugated paper prepressing device is the same as the pitch of the longitudinal corrugated embossing crests, and the first corrugated paper prepressing device is arranged in an inclined or V-shaped manner in a plan view.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010925221.5A CN112026277A (en) | 2020-09-06 | 2020-09-06 | Crawler belt type pressing and pasting equipment for producing large-size staggered double corrugated paperboard core layers |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010925221.5A CN112026277A (en) | 2020-09-06 | 2020-09-06 | Crawler belt type pressing and pasting equipment for producing large-size staggered double corrugated paperboard core layers |
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| CN112026277A true CN112026277A (en) | 2020-12-04 |
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| CN202010925221.5A Pending CN112026277A (en) | 2020-09-06 | 2020-09-06 | Crawler belt type pressing and pasting equipment for producing large-size staggered double corrugated paperboard core layers |
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