CN112519328A

CN112519328A - Method for manufacturing multi-layer corrugated board

Info

Publication number: CN112519328A
Application number: CN202011392546.8A
Authority: CN
Inventors: 何欣悦; 李晨
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-12-02
Filing date: 2020-12-02
Publication date: 2021-03-19

Abstract

The invention belongs to the technical field of paperboard processing, and particularly relates to a method for manufacturing a multi-layer corrugated paperboard, which comprises the following steps: step one, preparing paper pulp: crushing, washing and cooking plant fiber raw materials to obtain semi-fluid paper pulp; step two, preparing a core plate: pressing the paper pulp into a wave-shaped core plate shape, and cooling to obtain a solid wave-shaped core plate; step three, preparing a panel: pressing the paper pulp into a panel shape, and cooling to obtain a solid panel; step four, bonding and forming: adhering the solid panels to two sides of the solid core board to obtain a multi-layer corrugated board; and the fourth step is completed by matching a device for manufacturing the multi-layer corrugated board. In the process of adhering the panels to the two sides of the core board, the core board is prevented from being bent, and the flatness of the multi-layer corrugated board is ensured; the invention ensures the uniform thickness of the glue layer and further ensures the flatness of the multi-layer corrugated board.

Description

Method for manufacturing multi-layer corrugated board

Technical Field

The invention belongs to the technical field of corrugated board processing, and particularly relates to a method for manufacturing a multi-layer corrugated board.

Background

The multi-ply corrugated board is a multi-ply glued body which is composed of a waved core and a flat face sheet. The multi-layer corrugated paper board has the advantages of low cost, light weight, easy processing, excellent printing adaptability, convenient storage and transportation and the like, can resist collision and falling in the transportation process, and has higher mechanical strength, so the multi-layer corrugated paper board is widely applied to the packaging of food and digital products. The multi-layer corrugated board is manufactured by preparing paper pulp, pressing the paper pulp into a wavy core board and a flat panel, and finally, adhering the core board and the panel together at intervals in sequence. The following problems exist in the manufacturing process of the multi-layer corrugated board at present: (1) in the process of sticking the panels to the two sides of the core board, the core board is difficult to be firmly clamped, the core board is easy to bend, and the flatness of the formed multilayer corrugated board is adversely affected; (2) paste the core both sides in-process with the panel, need be the strip with glue and cover at every bellied position in core surface, it is the same to be difficult to guarantee to glue the volume down at every turn when gluing down, causes glue film thickness inequality easily, can cause adverse effect to the multilayer corrugated cardboard roughness after the shaping equally.

Disclosure of Invention

Technical problem to be solved

The invention provides a method for manufacturing a multi-layer corrugated board, aiming at solving the following problems in the manufacturing process of the multi-layer corrugated board at present: (1) in the process of sticking the panels to the two sides of the core board, the core board is difficult to be firmly clamped, the core board is easy to bend, and the flatness of the formed multilayer corrugated board is adversely affected; (2) paste the core both sides in-process with the panel, need be the strip with glue and cover at every bellied position in core surface, it is the same to be difficult to guarantee to glue the volume down at every turn when gluing down, causes glue film thickness inequality easily, can cause adverse effect to the multilayer corrugated cardboard roughness after the shaping equally.

(II) technical scheme

In order to solve the technical problems, the invention adopts the following technical scheme:

a method for manufacturing a multi-layer corrugated board comprises the following steps:

step one, preparing paper pulp: the plant fiber raw material is crushed, washed and cooked to obtain semi-fluid paper pulp.

Step two, preparing a core plate: and pressing the paper pulp into a wave-shaped core plate shape, and cooling to obtain the solid wave-shaped core plate.

Step three, preparing a panel: pressing the paper pulp into a panel shape, and cooling to obtain a solid panel.

Step four, bonding and forming: and adhering the solid face plates to two sides of the solid core plate to obtain the multilayer corrugated board.

The fourth step is completed by matching the multilayer corrugated board manufacturing device, the multilayer corrugated board manufacturing device comprises an installation table, supporting legs are fixedly installed on the bottom surface of the installation table, and square grooves are horizontally formed in the front end surface and the rear end surface of the installation table, which are vertical surfaces, of the installation table. The side wall of the square groove is horizontally provided with a sliding groove. The square groove is internally provided with a vertical mounting plate through sliding fit of a sliding groove. The handle is arranged on the rear end face of the mounting plate. The mounting plate can be pushed to horizontally slide along the sliding groove in the square groove through the handle.

The vertical fixed mounting has a plurality of first horizon bars that are parallel to each other and evenly distributed on the terminal surface before the mounting panel, and vertical fixed mounting has a plurality of second horizon bars that are parallel to first horizon bar and evenly distributed on the preceding terminal surface of mounting panel. The second horizontal rods are positioned between two adjacent first horizontal rods, and the first horizontal rods and the second horizontal rods are arranged in a staggered mode. The first horizontal rod and the second horizontal rod are in sliding fit with the mounting table. A first limiting rod parallel to the first horizontal rod is fixedly installed on the front end face of the first horizontal rod. The upper surface of the first limiting rod is matched with the wave crest of the lower surface of the solid wave-shaped core plate. A second limiting rod parallel to the second horizontal rod is fixedly arranged on the front end face of the second horizontal rod. The lower surface of the second limiting rod is matched with the wave trough of the upper surface of the solid wave-shaped core plate. The guide way has been seted up to the level that lies in first gag lever post top on the terminal surface before the mount table, and sliding fit has electronic slider in the guide way. The multilayer corrugated board manufacturing device further comprises a glue discharging mechanism. The mounting panel drives first horizon bar and second horizon bar horizontal slip, and first gag lever post and the synchronous horizontal slip of second gag lever post when square inslot horizontal slip. After the first limiting rod and the second limiting rod are pushed out of the mounting table, the solid wave-shaped core plate is inserted between the first limiting rod and the second limiting rod, so that the wave crest positions of the upper surface of the first limiting rod and the lower surface of the solid wave-shaped core plate are matched with each other, the wave trough positions of the lower surface of the second limiting rod and the upper surface of the solid wave-shaped core plate are matched with each other, and the limiting support of the solid wave-shaped core plate is completed.

The glue discharging mechanism comprises a strip-shaped glue storage cavity, and the glue storage cavity is horizontally and fixedly installed on the electric sliding block along the length direction of the first limiting rod. The side wall of the glue storage cavity is provided with a feed inlet. The vertical sliding fit in the middle of the bottom surface of the glue storage cavity is provided with a first lifting plate arranged along the length direction of the first lifting plate, and the bottom end of the first lifting plate is horizontally and fixedly provided with a first magnet strip arranged along the length direction of the first lifting plate. The upper surface of the first limiting rod is fixedly provided with a second magnet strip parallel to the first magnet strip. An oil groove is formed in the top plate of the glue storage cavity, the oil groove is provided with three ports, and the port in the middle of the oil groove is in vertical sliding fit with the first lifting plate. The ports on two sides of the oil groove are symmetrically arranged. The lower surface of the rubber storage cavity top plate is vertically and fixedly provided with a first sealing sleeve at the position corresponding to the ports at the two sides of the oil groove, and the bottom of the first sealing sleeve is fixedly provided with a second sealing sleeve. The bottom of the second seal sleeve is fixedly connected to the upper surface of the glue storage cavity bottom plate. Inside and the oil groove intercommunication each other of first seal cover and vertical sliding fit have the second lifter plate. A horizontal sealing plate is vertically matched in the second sealing sleeve in a sliding manner, and the upper surface of the sealing plate is fixedly connected with the bottom surface of the second lifting plate. The bottom surface of the glue storage cavity is provided with a plurality of glue outlet grooves which are uniformly arranged along the length direction of the glue storage cavity corresponding to the position of the second seal sleeve. The side wall of the second sealing sleeve is provided with a plurality of glue feeding grooves which are uniformly arranged along the length direction of the glue storage cavity and are positioned below the sealing plate. A first one-way valve is installed in the glue outlet groove, and a second one-way valve is installed in the glue inlet groove. The first lifting plate is horizontally and fixedly provided with a supporting plate arranged along the length direction of the first lifting plate, and a first spring is vertically and fixedly connected between the supporting plate and the lower surface of the top plate of the glue storage cavity.

The first lifting plate is pushed upwards to drive the second lifting plate and the sealing plate to descend, and the supporting plate synchronously moves upwards to compress the first spring; glue is injected into the glue storage cavity through the feed inlet. After the glue injection is finished, the first lifting plate is loosened, the first lifting plate and the supporting plate move downwards under the action of the elastic force of the first spring to restore to the initial height, and meanwhile, the second lifting plate and the sealing plate are driven to ascend; when the sealing plate ascends, the glue in the glue storage cavity is sucked into the second sealing sleeve from the glue inlet groove through the second one-way valve. The electric sliding block drives the glue storage cavity to move intermittently, when the glue storage cavity moves to the upper part of the first limiting rod, the electric sliding block is static, mutual repulsion force is generated between the first magnet strip and the second magnet strip, and the first magnet strip and the first lifting plate are pushed to move upwards under the action of mutual repulsion force. The first spring of backup pad rebound compression is driven when first lifter plate rebound, and hydraulic oil in the oil groove is extruded simultaneously to first lifter plate, receives extruded hydraulic oil to promote second lifter plate and closing plate decline. When the sealing plate descends, the glue in the second sealing sleeve is extruded out through the glue outlet groove and the first one-way valve, and the extruded glue freely falls to the convex part on the upper surface of the solid wave-shaped core plate. After the electric sliding block continues to move, the mutual repulsion force between the first magnet strip and the second magnet strip disappears, the first lifting plate and the supporting plate move downwards under the action of the elastic force of the first spring and restore to the initial height, and meanwhile, the second lifting plate and the sealing plate are driven to rise; when the sealing plate ascends, the glue in the glue storage cavity is sucked into the second sealing sleeve from the glue inlet groove through the second one-way valve.

As a preferred technical scheme of the invention, the side wall of the glue storage cavity is fixedly provided with a vent pipe. The outer end of the breather pipe is communicated with the outside of the glue storage cavity, and the inner end of the breather pipe is positioned in the second sealing sleeve and above the sealing plate. The breather pipe is communicated with the part, located above the sealing plate, inside the second sealing sleeve and the outside of the glue storage cavity, so that the influence of air pressure on the vertical movement of the sealing plate is avoided.

As a preferable technical scheme of the invention, the front end surface of the mounting plate is fixedly provided with a mushroom button. The square groove end face is provided with a clamping groove matched with the mushroom button. The mounting plate can be fixed through the cooperation of the mushroom button and the clamping groove, so that the mounting plate cannot drive the solid wavy core plate to freely slide in the working process. When the mounting plate is pulled outwards, the mushroom button can be driven to be separated from the clamping groove.

According to a preferable technical scheme of the invention, the upper surface of the first limiting rod is uniformly provided with a plurality of first vent grooves, and the first limiting rod is internally provided with a second vent groove communicated with the first vent grooves. A third vent groove communicated with the second vent groove is formed in the first horizontal rod. The end part of the third air passing groove is vertically matched with a first magnet block which is in sealing fit with the inner wall of the third air passing groove in a sliding way. And a second spring is vertically and fixedly connected between the bottom of the first magnet block and the inner wall of the third air through groove. The mounting table is internally located above the three-way air groove and is provided with a holding tank, and a second magnet block is fixedly mounted in the holding tank. And the solid wavy core plate is inserted between the first limiting rod and the second limiting rod and then continuously pushed to the mounting plate until the first magnet block reaches the position corresponding to the second magnet block. Attractive force is generated between the first magnet block and the second magnet block, the first magnet block is driven to ascend through attractive force to elongate the second spring, meanwhile, air pressure in the third air passing groove, the second air passing groove and the first air passing groove is reduced, then the solid wavy core plate is tightly pressed on the surface of the first limiting rod through air pressure, relative sliding between the solid wavy core plate and the first limiting rod is avoided, and the supporting limiting effect on the solid wavy core plate is further improved.

As a preferred technical solution of the present invention, the bottom of the sidewall of the accommodating groove is fixedly provided with a limiting piece matched with the first magnet block, so as to prevent the first magnet block from entering the accommodating groove when the first magnet block rises, and ensure that the mounting plate can drive the first horizontal rod to freely horizontally slide.

As a preferable technical scheme of the invention, the first one-way valve comprises a sealing ring fixedly arranged in the glue outlet groove, and a guide rod is vertically and fixedly arranged on the lower surface of the sealing ring. And a sealing block matched with the sealing ring is arranged on the guide rod in a sliding way. The bottom end of the guide rod is fixedly provided with a supporting sheet. A third spring sleeved on the guide rod is fixedly connected between the supporting sheet and the sealing block. The second one-way valve has the same structure as the first one-way valve, and is different from the first one-way valve only in that the second one-way valve is in a transverse state. When the sealing plate descends, the glue in the second sealing sleeve is squeezed and pushes the sealing block to move downwards along the guide rod against the elastic force of the third spring. The sealing block is separated from the sealing ring, and the glue falls down from the space between the sealing block and the sealing ring. After the glue in the second sealing sleeve is completely extruded, the elastic force of the third spring pushes the sealing block to move upwards until the sealing block is attached to the sealing ring.

(III) advantageous effects

The invention has at least the following beneficial effects:

(1) the invention solves the following problems in the prior process of manufacturing the multi-layer corrugated board: in the process of sticking the panels to the two sides of the core board, the core board is difficult to be firmly clamped, the core board is easy to bend, and the flatness of the formed multilayer corrugated board is adversely affected; paste the core both sides in-process with the panel, need be the strip with glue and cover at every bellied position in core surface, it is the same to be difficult to guarantee to glue the volume down at every turn when gluing down, causes glue film thickness inequality easily, can cause adverse effect to the multilayer corrugated cardboard roughness after the shaping equally.

(2) In the process of adhering the panel to the two sides of the core plate, the surface of the core plate is stably supported and limited by the first limiting rod and the second limiting rod, so that the core plate is prevented from being bent; meanwhile, the core plate is tightly pressed on the surface of the first limiting rod under the action of air pressure, so that the core plate and the first limiting rod are prevented from sliding relatively, the supporting and limiting effect on the core plate is further improved, and the flatness of the multilayer corrugated board is ensured.

(3) According to the invention, in the process of adhering the panel to the two sides of the core plate, the glue is applied to the convex part on the surface of the core plate through the glue applying mechanism, and as the mutual repulsion force between the first magnet strip and the second magnet strip is constant in each glue applying process, the constant ascending distance of the first magnet strip and the first lifting plate can be ensured, so that the same glue amount falling from the glue outlet groove every time is ensured, the uniform thickness of the glue layer is further ensured, and the flatness of the multi-layer corrugated board is further ensured.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a step diagram illustrating a method of making a multi-ply corrugated paperboard in accordance with one embodiment of the present invention;

FIG. 2 is a schematic perspective view of a device for making a multi-ply corrugated cardboard in accordance with an embodiment of the present invention;

FIG. 3 is a second perspective view of an apparatus for making a multi-ply corrugated cardboard in accordance with an embodiment of the present invention;

FIG. 4 is a schematic diagram of an internal structure of a glue dispensing mechanism according to an embodiment of the present invention;

FIG. 5 is an enlarged schematic view at A in FIG. 4;

FIG. 6 is a schematic view of the internal structure of the mounting table in the embodiment of the present invention;

FIG. 7 is an enlarged schematic view at B of FIG. 6;

fig. 8 is an enlarged schematic view at C in fig. 6.

In the figure: 1-mounting table, 2-square groove, 3-sliding groove, 4-mounting plate, 5-handle, 6-first horizontal rod, 7-second horizontal rod, 8-first limiting rod, 9-second limiting rod, 10-guide groove, 11-electric slider, 12-glue-discharging mechanism, 121-glue-storing cavity, 122-feed inlet, 123-first lifting plate, 124-first magnet strip, 125-second magnet strip, 126-oil groove, 127-first sealing sleeve, 128-second sealing sleeve, 129-second lifting plate, 1210-sealing plate, 1211-glue-discharging groove, 1212-glue-inlet groove, 1213-first check valve, 12131-sealing ring, 12132-guide rod, 12133-sealing block, 12134-supporting plate, 12135-third spring, 1214, a second one-way valve, 1215, a support plate, 1216, a first spring, 1217, a vent pipe, 13, a mushroom button, 14, a clamping groove, 15, a first vent groove, 16, a second vent groove, 17, a third vent groove, 18, a first magnet block, 19, a second spring, 20, a holding groove, 21, a second magnet block and 22, a limiting piece.

Detailed Description

The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.

As shown in fig. 1, the present embodiment provides a method for manufacturing a multi-layer corrugated cardboard, comprising the following steps:

The fourth step is completed by matching a multilayer corrugated board manufacturing device as shown in fig. 2 to fig. 8, the multilayer corrugated board manufacturing device comprises a mounting table 1, supporting legs are fixedly mounted on the bottom surface of the mounting table 1, and a square groove 2 is horizontally formed in the front end surface and the rear end surface of the mounting table 1 and is a vertical surface. The side wall of the square groove 2 is horizontally provided with a sliding groove 3. A vertical mounting plate 4 is arranged in the square groove 2 through a sliding groove 3 in a sliding fit mode. The handle 5 is arranged on the rear end surface of the mounting plate 4. The mounting plate 4 can be pushed by the handle 5 to horizontally slide along the sliding groove 3 in the square groove 2. The front end surface of the mounting plate 4 is fixedly provided with a mushroom button 13. The end surface of the square groove 2 is provided with a clamping groove 14 which is matched with the mushroom button 13. The mounting plate 4 can be fixed through the matching of the mushroom button 13 and the clamping groove 14, and the mushroom button 13 can be driven to be separated from the clamping groove 14 when the mounting plate 4 is pulled outwards.

A plurality of first horizontal rods 6 which are parallel to each other and are uniformly distributed are vertically and fixedly installed on the front end face of the mounting plate 4, and a plurality of second horizontal rods 7 which are parallel to the first horizontal rods 6 and are uniformly distributed are vertically and fixedly installed on the front end face of the mounting plate 4. The second horizontal rods 7 are positioned between two adjacent first horizontal rods 6, and the first horizontal rods 6 and the second horizontal rods 7 are staggered. The first horizontal rod 6 and the second horizontal rod 7 are in sliding fit with the mounting table 1. A first limiting rod 8 parallel to the first horizontal rod 6 is fixedly arranged on the front end face of the first horizontal rod. The upper surface of the first limiting rod 8 is matched with the wave crest of the lower surface of the solid wave-shaped core plate. A second limiting rod 9 parallel to the second horizontal rod 7 is fixedly arranged on the front end face of the second horizontal rod. The lower surface of the second limiting rod 9 is matched with the wave trough of the upper surface of the solid wave-shaped core plate. A guide groove 10 is horizontally formed in the front end face of the mounting table 1 above the first limiting rod 8, and an electric sliding block 11 is arranged in the guide groove 10 in a sliding fit mode. The device for manufacturing the multi-layer corrugated board further comprises a glue discharging mechanism 12. The mounting plate 4 drives the first horizontal rod 6 and the second horizontal rod 7 to horizontally slide when horizontally sliding in the square groove 2, and the first limiting rod 8 and the second limiting rod 9 synchronously horizontally slide. After the first limiting rod 8 and the second limiting rod 9 are pushed out of the mounting table 1, the solid wave-shaped core plate is inserted between the first limiting rod 8 and the second limiting rod 9, so that the wave crests of the upper surface of the first limiting rod 8 and the wave crests of the lower surface of the solid wave-shaped core plate are matched with each other, the wave troughs of the lower surface of the second limiting rod 9 and the wave troughs of the upper surface of the solid wave-shaped core plate are matched with each other, and the limiting support of the solid wave-shaped core plate is completed.

The glue discharging mechanism 12 comprises a strip-shaped glue storage cavity 121, and the glue storage cavity 121 is horizontally and fixedly installed on the electric sliding block 11 along the length direction of the first limiting rod 8. The side wall of the glue storage cavity 121 is provided with a feed inlet 122. The middle part of the bottom surface of the glue storage cavity 121 is vertically matched with a first lifting plate 123 arranged along the length direction in a sliding manner, and a first magnet strip 124 arranged along the length direction is horizontally and fixedly installed at the bottom end of the first lifting plate 123. The upper surface of the first limiting rod 8 is fixedly provided with a second magnet bar 125 parallel to the first magnet bar 124. Oil groove 126 is opened to the inside oil groove 126 that has seted up of glue storage chamber 121 roof, and oil groove 126 has three port, the vertical sliding fit of port and first lifter plate 123 in the middle of it. The oil groove 126 is symmetrically arranged at both side ports. A first sealing sleeve 127 is vertically and fixedly mounted on the lower surface of the top plate of the glue storage cavity 121 corresponding to the ports on the two sides of the oil groove 126, and a second sealing sleeve 128 is fixedly mounted at the bottom of the first sealing sleeve 127. The bottom of the second sealing sleeve 128 is fixedly connected to the upper surface of the bottom plate of the glue storage cavity 121. The interior of the first gland 127 is interconnected with the oil sump 126 and has a second lift plate 129 in a vertical sliding fit. A horizontal sealing plate 1210 is vertically and slidably fitted in the second sealing sleeve 128, and the upper surface of the sealing plate 1210 is fixedly connected with the bottom surface of the second lifting plate 129. The bottom surface of the glue storage cavity 121 is provided with a plurality of glue outlet grooves 1211 uniformly arranged along the length direction of the glue storage cavity 121 at positions corresponding to the second sealing sleeve 128. The sidewall of the second sealing boot 128 is provided with a plurality of glue feeding grooves 1212 which are uniformly arranged along the length direction of the glue storage cavity 121 and are located below the sealing plate 1210. A first check valve 1213 is installed in the glue outlet 1211, and a second check valve 1214 is installed in the glue inlet 1212. A supporting plate 1215 is horizontally and fixedly arranged on the side surface of the first lifting plate 123 along the length direction of the first lifting plate, and a first spring 1216 is vertically and fixedly connected between the supporting plate 1215 and the lower surface of the top plate of the glue storage cavity 121. The side wall of the glue storage cavity 121 is fixedly provided with a vent pipe 1217. The outer end of the vent pipe 1217 is communicated with the outside of the glue storage cavity 121, and the inner end of the vent pipe 1217 is positioned in the second sealing sleeve 128 and above the sealing plate 1210. The vent pipe communicates the part of the second sealing sleeve 128 above the sealing plate 1210 with the outside of the glue storage cavity 121, so that the sealing plate 1210 is prevented from moving up and down under the action of air pressure.

The first lifting plate 123 is pushed upwards to drive the second lifting plate 129 and the sealing plate 1210 to descend, and the supporting plate 1215 synchronously moves upwards to compress the first spring 1216; glue is injected into the glue storage cavity 121 through the feed opening 122. After the glue injection is finished, the first lifting plate 123 is loosened, the first lifting plate 123 and the support plate 1215 move downwards under the action of the elastic force of the first spring 1216 to restore to the initial height, and simultaneously, the second lifting plate 129 and the sealing plate 1210 are driven to ascend; when the sealing plate 1210 ascends, the glue in the glue storage cavity 121 is sucked into the second sealing sleeve 128 from the glue inlet groove 1212 through the second one-way valve 1214. The electric sliding block 11 drives the glue storage cavity 121 to move intermittently, when the glue storage cavity 121 moves to the upper side of the first limiting rod 8, the electric sliding block 11 is static, mutual repulsion force is generated between the first magnet strip 124 and the second magnet strip 125, and the first magnet strip 124 and the first lifting plate 123 are pushed to move upwards under the action of the mutual repulsion force. When the first lifting plate 123 moves upward, the supporting plate 1215 is driven to move upward to compress the first spring 1216, the first lifting plate 123 simultaneously presses the hydraulic oil in the oil groove 126, and the pressed hydraulic oil pushes the second lifting plate 129 and the sealing plate 1210 to descend. When the sealing plate 1210 descends, the glue in the second sealing sleeve 128 is extruded out through the glue outlet groove 1211 and the first one-way valve 1213, and the extruded glue freely falls to the convex part on the upper surface of the solid wave-shaped core plate. After the electric slider 11 continues to move, the mutual repulsion force between the first magnet bar 124 and the second magnet bar 125 disappears, and the first lifting plate 123 and the support plate 1215 move downward under the action of the elastic force of the first spring 1216 to restore to the initial height, and simultaneously drive the second lifting plate 129 and the sealing plate 1210 to rise; when the sealing plate 1210 ascends, the glue in the glue storage cavity 121 is sucked into the second sealing sleeve 128 from the glue inlet groove 1212 through the second one-way valve 1214.

A plurality of first air grooves 15 are uniformly formed in the upper surface of the first limiting rod 8, and second air grooves 16 communicated with the first air grooves 15 are formed in the first limiting rod 8. A third vent groove 17 communicated with the second vent groove 16 is formed in the first horizontal rod 6. The end of the third vent groove 17 is vertically matched with a first magnet block 18 in a sliding way, and the first magnet block is matched with the inner wall of the third vent groove in a sealing way. A second spring 19 is vertically and fixedly connected between the bottom of the first magnet block 18 and the inner wall of the third air passing groove 17. An accommodating groove 20 is formed in the mounting table 1 above the three-way air groove 17, and a second magnet block 21 is fixedly mounted in the accommodating groove 20. The solid wave-shaped core plate is inserted between the first stop bar 8 and the second stop bar 9 and then the mounting plate 4 is pushed continuously until the first magnet block 18 reaches the position corresponding to the second magnet block 21. Attractive force is generated between the first magnet block 18 and the second magnet block 21, the first magnet block 18 is driven to ascend through the action of the attractive force to elongate the second spring 19, meanwhile, the air pressure in the third air through groove 17, the second air through groove 16 and the first air through groove 15 is reduced, then the solid wavy core plate is tightly pressed on the surface of the first limiting rod 8 through the action of the air pressure, the solid wavy core plate is prevented from sliding relative to the first limiting rod 8, and the supporting and limiting effect on the solid wavy core plate is further improved. The bottom of the sidewall of the receiving groove 20 is fixedly mounted with a limiting piece 22 cooperating with the first magnet block 18 to prevent the first magnet block 18 from entering the receiving groove 20 when ascending, so as to ensure that the mounting plate 4 can drive the first horizontal rod 6 to slide horizontally.

The first check valve 1213 includes a sealing ring 12131 fixedly installed in the glue outlet groove 1211, and a guide bar 12132 is vertically and fixedly installed on a lower surface of the sealing ring 12131. A sealing block 12133 interfitting with sealing ring 12131 is slidably fitted over guide stem 12132. A support sheet 12134 is fixedly mounted at the bottom end of the guide bar 12132. A third spring 12135 sleeved on the guide rod 12132 is fixedly connected between the support sheet 12134 and the sealing block 12133. The second check valve 1214 is identical in structure to the first check valve 1213 except that the second check valve 1214 is in a horizontal position. The lowering of seal plate 1210 compresses the glue in second gland 128 and pushes seal block 12133 downward along guide stem 12132 against the force of third spring 12135. Sealing block 12133 is separated from sealing ring 12131 and glue falls from between sealing block 12133 and sealing ring 12131. After the glue in second sealing boot 128 is completely squeezed out, the resilient action of third spring 12135 pushes sealing block 12133 upward until sealing block 12133 abuts against sealing ring 12131.

The working steps of the device for manufacturing the multi-layer corrugated board in the embodiment are as follows: promote mounting panel 4 horizontal slip in square inslot 2, mounting panel 4 drives first horizon bar 6 and the 7 horizontal slip of second horizon bar, and the synchronous horizontal slip of first gag lever post 8 and second gag lever post 9. After the first limiting rod 8 and the second limiting rod 9 are pushed out of the mounting table 1, the solid wave-shaped core plate is inserted between the first limiting rod 8 and the second limiting rod 9, so that the wave crests of the upper surface of the first limiting rod 8 and the wave crests of the lower surface of the solid wave-shaped core plate are matched with each other, the wave troughs of the lower surface of the second limiting rod 9 and the wave troughs of the upper surface of the solid wave-shaped core plate are matched with each other, and the limiting support of the solid wave-shaped core plate is completed. The electric sliding block 11 drives the glue storage cavity 121 to move intermittently, when the glue storage cavity 121 moves to the position above the first limiting rod 8, the electric sliding block 11 is static, and the glue discharging mechanism 12 discharges glue to the convex part of the upper surface of the solid wavy core plate. And after the glue is applied, adhering the solid panel to the position of the solid wavy core plate where the glue is applied. And after the glue is solidified, turning over the solid wave-shaped core plate, and adhering the other solid panel to the other surface of the solid wave-shaped core plate according to the steps.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for manufacturing a multi-layer corrugated board is characterized by comprising the following steps of:

step one, preparing paper pulp: crushing, washing and cooking plant fiber raw materials to obtain semi-fluid paper pulp;

step two, preparing a core plate: pressing the paper pulp into a wave-shaped core plate shape, and cooling to obtain a solid wave-shaped core plate;

step three, preparing a panel: pressing the paper pulp into a panel shape, and cooling to obtain a solid panel;

step four, bonding and forming: adhering the solid panels to two sides of the solid core board to obtain a multi-layer corrugated board;

the fourth step is completed by matching a multilayer corrugated board manufacturing device, the multilayer corrugated board manufacturing device comprises an installation table (1), supporting legs are fixedly installed on the bottom surface of the installation table (1), the front end surface and the rear end surface of the installation table (1) are vertical surfaces, and a square groove (2) is horizontally formed in the rear end surface of the installation table (1); a sliding groove (3) is horizontally arranged on the side wall of the square groove (2); a vertical mounting plate (4) is in sliding fit with the square groove (2) through a sliding groove (3); a handle (5) is arranged on the rear end surface of the mounting plate (4);

a plurality of first horizontal rods (6) which are parallel to each other and are uniformly distributed are vertically and fixedly arranged on the front end surface of the mounting plate (4), and a plurality of second horizontal rods (7) which are parallel to the first horizontal rods (6) and are uniformly distributed are vertically and fixedly arranged on the front end surface of the mounting plate (4); the second horizontal rods (7) are positioned between two adjacent first horizontal rods (6), and the first horizontal rods (6) and the second horizontal rods (7) are arranged in a staggered manner; the first horizontal rod (6) and the second horizontal rod (7) are in sliding fit with the mounting table (1); a first limiting rod (8) parallel to the first horizontal rod (6) is fixedly arranged on the front end surface of the first horizontal rod; the upper surface of the first limiting rod (8) is matched with the wave crest of the lower surface of the solid wave-shaped core plate; a second limiting rod (9) parallel to the second horizontal rod (7) is fixedly arranged on the front end surface of the second horizontal rod; the lower surface of the second limiting rod (9) is matched with the wave trough of the upper surface of the solid wave-shaped core plate; a guide groove (10) is horizontally formed in the front end face of the mounting table (1) above the first limiting rod (8), and an electric sliding block (11) is in sliding fit in the guide groove (10); the multilayer corrugated board manufacturing device also comprises a glue discharging mechanism (12);

the glue discharging mechanism (12) comprises a strip-shaped glue storage cavity (121), and the glue storage cavity (121) is horizontally and fixedly arranged on the electric sliding block (11) along the length direction of the first limiting rod (8); a feed inlet (122) is formed in the side wall of the glue storage cavity (121); a first lifting plate (123) arranged along the length direction of the glue storage cavity (121) is vertically and slidably matched with the middle of the bottom surface of the glue storage cavity, and a first magnet strip (124) arranged along the length direction of the first lifting plate (123) is horizontally and fixedly installed at the bottom end of the first lifting plate (123); a second magnet strip (125) parallel to the first magnet strip (124) is fixedly arranged on the upper surface of the first limiting rod (8); an oil groove (126) is formed in the top plate of the rubber storage cavity (121), the oil groove (126) is provided with three ports, and the port in the middle of the oil groove is vertically matched with the first lifting plate (123) in a sliding manner; the ports on the two sides of the oil groove (126) are symmetrically arranged; a first sealing sleeve (127) is vertically and fixedly installed on the lower surface of the top plate of the glue storage cavity (121) at a position corresponding to ports on two sides of the oil groove (126), and a second sealing sleeve (128) is fixedly installed at the bottom of the first sealing sleeve (127); the bottom of the second sealing sleeve (128) is fixedly connected to the upper surface of the bottom plate of the glue storage cavity (121); the interior of the first sealing sleeve (127) is communicated with the oil groove (126) and is vertically matched with a second lifting plate (129) in a sliding manner; a horizontal sealing plate (1210) is vertically matched in the second sealing sleeve (128) in a sliding manner, and the upper surface of the sealing plate (1210) is fixedly connected with the bottom surface of the second lifting plate (129); a plurality of glue outlet grooves (1211) which are uniformly arranged along the length direction of the glue storage cavity (121) are formed in the position, corresponding to the second sealing sleeve (128), of the bottom surface of the glue storage cavity (121); a plurality of glue inlet grooves (1212) which are uniformly arranged along the length direction of the glue storage cavity (121) and are positioned below the sealing plate (1210) are formed in the side wall of the second sealing sleeve (128); a first one-way valve (1213) is arranged in the glue outlet groove (1211), and a second one-way valve (1214) is arranged in the glue inlet groove (1212); the lateral surface of the first lifting plate (123) is horizontally and fixedly provided with a supporting plate (1215) which is arranged along the length direction of the first lifting plate, and a first spring (1216) is vertically and fixedly connected between the supporting plate (1215) and the lower surface of the top plate of the glue storage cavity (121).

2. A method of making a multi-ply corrugated paperboard as claimed in claim 1, wherein: a vent pipe (1217) is fixedly arranged on the side wall of the glue storage cavity (121); the outer end of the vent pipe (1217) is communicated with the outside of the glue storage cavity (121), and the inner end of the vent pipe (1217) is positioned in the second sealing sleeve (128) and above the sealing plate (1210).

3. A method of making a multi-ply corrugated paperboard as claimed in claim 1, wherein: a mushroom button (13) is fixedly arranged on the front end surface of the mounting plate (4); the end surface of the square groove (2) is provided with a clamping groove (14) which is matched with the mushroom button (13).

4. A method of making a multi-ply corrugated paperboard as claimed in claim 1, wherein: a plurality of first ventilation grooves (15) are uniformly formed in the upper surface of the first limiting rod (8), and second ventilation grooves (16) communicated with the first ventilation grooves (15) are formed in the first limiting rod (8); a third vent groove (17) communicated with the second vent groove (16) is formed in the first horizontal rod (6); a first magnet block (18) which is in sealing fit with the inner wall of the third air passing groove (17) is vertically matched with the end of the third air passing groove in a sliding manner; a second spring (19) is vertically and fixedly connected between the bottom of the first magnet block (18) and the inner wall of the third vent groove (17); an accommodating groove (20) is formed in the mounting table (1) and located above the three-way air groove (17), and a second magnet block (21) is fixedly mounted in the accommodating groove (20).

5. A method of making a multi-ply corrugated paperboard as claimed in claim 4, wherein: and the bottom of the side wall of the accommodating groove (20) is fixedly provided with a limiting piece (22) matched with the first magnet block (18).

6. A method of making a multi-ply corrugated paperboard as claimed in claim 1, wherein: the first check valve (1213) comprises a sealing ring (12131) fixedly arranged in the glue outlet groove (1211), and a guide rod (12132) is vertically and fixedly arranged on the lower surface of the sealing ring (12131); a sealing block (12133) which is matched with the sealing ring (12131) is glidingly matched on the guide rod (12132); a support sheet (12134) is fixedly arranged at the bottom end of the guide rod (12132); a third spring (12135) sleeved on the guide rod (12132) is fixedly connected between the support sheet (12134) and the sealing block (12133); the second check valve (1214) is identical in structure to the first check valve (1213) except that the second check valve (1214) is in a horizontal position.