Gluing equipment for corrugated board production and application method

Abstract

Gluing equipment for corrugated board production comprises an electric drive guide roller, a glue supply mechanism, a gluing roller, an electric push rod, an air compressor and an electromagnetic valve and further comprises a detection mechanism, a control circuit and a residual glue amount detection mechanism. The upper ends of the electric push rods and the outsides of the two sides of the gluing roller are mounted together; the electric push rods are mounted in front of the support frames on the two sides of the set of electrically driven guide rollers at the rear end; glue inlets of the two sets of gluing rollers are connected in series through valves and hoses respectively and are connected with one end of a first electromagnetic valve; the glue supply mechanism comprises a glue box, a glue conveying pipe, a pressure switch and a glue adding pipe which are installed together, each set of detection mechanism comprises a spring and a pressure resistor which are installed together, and the residual glue amount detection mechanism comprises a glue receiving plate, a linear bearing, a pressure sensor and a prompt circuit which are installed together; a gluing method of the gluing equipment for corrugated board production comprises three steps. The upper layer and the lower layer of a core paper interlayer can be synchronously glued, the working efficiency and the gluing quality are improved, and a worker can be prompted when excessive glue drips.

Description

Technical Field

[0001] The invention relates to the technical field of corrugated board production, in particular to a gluing device for corrugated board production and an application method. Background Art

[0002] Corrugated cardboard is a multi-layer paper bonded together. It consists of at least one layer of wavy (including rectangular, triangular, trapezoidal, etc.) core paper interlayer (commonly known as corrugated paper, corrugated core paper, corrugated paper core, corrugated base paper) and two layers of cardboard (also known as boxboard, boxboard). It has high mechanical strength and can withstand collisions and falls during transportation. The actual performance of cartons made of corrugated cardboard depends on three factors: the characteristics of the core paper and cardboard and the structure of the carton itself.

[0003] In the actual production of corrugated paperboard, it is necessary to apply glue to the upper and lower ends of the core paper sandwich, and then adhere the core paper sandwich to the lower and upper ends of the two layers of paperboard to form the corrugated paperboard. In the existing technology, the upper and lower ends of the core paper sandwich are applied with glue manually or mechanically. The manual method is usually only used in small corrugated paperboard manufacturers due to its low efficiency. The equipment for mechanically applying glue to the upper and lower ends of the core paper interlayer is generally provided with two sets of electric drive guide rollers distributed up and down at the front and rear ends of the working area (the surface of each set of two guide rollers is respectively annularly distributed with grooves and convex grooves of the same shape and depth as the upper and lower ends of the core paper interlayer. Before applying glue to the core paper interlayers of different heights, the staff adjusts the distance between the two guide rollers of the two sets of guide rollers respectively). The staff feeds the core paper interlayer to be glued from the rear end of the rear guide roller, and the glue roller between the front and rear sets of guide rollers applies glue to the upper end of the core paper interlayer. After the glue is applied, the front guide roller pulls the core paper interlayer to move forward (the front guide roller also has the function of dispersing the glue evenly), enters the gluing process of the lower end of the next core paper interlayer, and finally enters the bonding and drying process of the core paper interlayer and the two layers of cardboard. Although the existing mechanical glue rollers meet the needs of gluing the core paper interlayer to a certain extent, there are still some specific technical problems due to structural limitations. Specifically, the glue coating roller can only apply glue to the upper end of the core paper interlayer at a time. In this way, other mechanisms are required to move the upper end of the core paper interlayer to the lower end after gluing the upper end (gluing at the upper end is gluing the wavy upper convex part of the core paper interlayer, and gluing at the lower end is gluing the lower side of the flat part of the core paper interlayer) in order to glue the lower end of the core paper interlayer that is at the upper end. Since the above working mode cannot gluing the upper and lower ends of the core paper interlayer synchronously, it is not conducive to improving work efficiency, and the overall production equipment is relatively more complicated. In addition, the height of the existing glue roller is fixed. Before gluing the core paper interlayer with different wave heights, the technician needs to adjust the height of the glue roller. The above operation will bring inconvenience to the relevant technicians. More importantly, when the relevant technicians are inexperienced and fail to adjust the glue roller into place, it is possible that during the subsequent gluing, the distance between the lower end of the glue roller and the upper end of the core paper interlayer is too large or too small, resulting in poor gluing effect of the core paper interlayer (in actual production, the lower end of the glue outlet hole of the glue roller needs to fit the upper gluing part of the core paper interlayer. If the distance is too large, the glue cannot be effectively applied to the gluing part of the upper end of the core paper interlayer. After the glue drips to the side end of the upper gluing part, it will not only affect the gluing effect of the corresponding gluing part of the core paper interlayer, but also cause unnecessary waste of glue. If the distance is too small, it may cause the glue roller to apply too much pressure on the core paper interlayer, causing it to deform, affecting the quality of the finished corrugated board). Summary of the invention

[0004] In order to overcome the shortcomings of relatively low work efficiency, relatively complex production equipment and high cost in the existing corrugated board production due to the inability to simultaneously apply glue to the upper and lower layers of the core paper interlayer, and the inability to effectively ensure that the glue outlet holes of the glue coating roller fit the gluing position of the core paper interlayer, and the drawback that the gluing quality cannot be guaranteed, the present invention provides a gluing device and a gluing method for corrugated board production, which can synchronously apply glue to the upper and lower layers of the core paper interlayer under the joint action of relevant mechanisms, thereby improving the work efficiency, and the applied production equipment is relatively simple and low in cost, and can effectively ensure that the glue outlet holes of the upper and lower glue coating rollers fit the gluing position of the core paper interlayer, thereby improving the gluing quality.

[0005] The technical solution adopted by the present invention to solve its technical problem is:

[0006] A gluing device for corrugated cardboard production, comprising an electrically driven guide roller, a glue supply mechanism, a gluing roller, an electric push rod, an air compressor, and an electromagnetic valve, characterized in that it also has a detection mechanism, a control circuit, and a glue-residue detection mechanism; the gluing rollers are provided with at least two sets, and the electric push rods are provided with multiple sets, one end of the gluing roller is a closed structure, and the other end has a glue inlet, a glue outlet pipe is installed at a distance at the lower end of the gluing roller, a gluing pipe is installed at the lower end of each glue outlet pipe, and the lower end of each gluing pipe has multiple glue outlet holes; among the multiple sets of electric push rods, the upper ends of two sets and the other two sets of electric push rods are respectively installed together with the outer ends of both sides of the two sets of gluing rollers; the multiple sets of electric push rods are respectively installed At the upper and lower front ends of the support frames on both sides of a set of electric-driven guide rollers at the rear end, the glue coating pipes of one set and the other set of glue coating rollers are respectively located between the lower side of the upper guide roller and the upper side of the lower guide groove; there are at least two solenoid valves, and the glue inlets of the two sets of glue coating rollers are respectively connected to one end of a valve, and the other ends of the two valves are respectively connected in series with one end of the first solenoid valve through a hose; the glue supply mechanism includes a glue tank, a glue delivery hose, a pressure switch, and a glue adding hose. The glue tank is installed on the side of a set of electric-driven guide rollers at the rear end, and the lower ends of the air inlet pipes of the glue adding hose and the pressure switch and one end of the second solenoid valve are respectively installed at the upper end of the glue tank. A sealing cover is installed at the upper end of the glue adding hose, and one end of the glue delivery hose is installed At the lower end of one side of the glue tank, the other end of the glue delivery pipe is connected to the other end of the first solenoid valve, and the other end of the second solenoid valve is connected to the exhaust pipe of the air compressor; the detection mechanism includes at least two sets, each set of detection mechanism includes a spring, a pressure resistor, two sets of glue coating rollers are installed with a guide seat, one end of the glue outlet pipe of the two sets of glue coating rollers is slidably sealed in the guide seat, and a support plate is installed on the outside of one side of one of the glue outlet pipes, one end of the springs of the two detection mechanisms are respectively installed on the support plates, and the outer ends of the two guide seats are respectively installed with fixed plates, and the pressure resistors of the two detection mechanisms are respectively installed on the two fixed plates; the glue amount detection mechanism includes a glue connecting plate, a linear bearing and a pressure sensor and a prompt circuit. The bearing seat sleeve of the linear bearing is installed on the inner side of a support frame of a set of electric drive guide rollers at the rear end. The upper end of the bearing rod of the linear bearing is installed at the lower end of the glue plate. The pressure sensor is installed at the side end of the bearing seat of the linear bearing. The control circuit and the prompt circuit are installed in the control box. The power supply output end of the pressure switch is electrically connected to one end of the power supply input of the second solenoid valve, the signal output end of the pressure sensor is electrically connected to the signal input end of the prompt circuit, the signal output ends of the two pressure resistors are electrically connected to the two signal input ends of the control circuit respectively, and the multi-way power supply output end of the control circuit is electrically connected to the power supply input ends of multiple sets of electric push rods respectively.

[0007] Preferably, the solenoid valve is a normally closed valve core solenoid valve; glue is added to the glue box; the other ends of the springs of the two sets of detection mechanisms are respectively in contact with the pressure resistor force surfaces of the two sets of detection mechanisms, and the pressure resistor force surfaces of the upper set of detection mechanisms face downward, and the pressure resistor force surfaces of the lower set of detection mechanisms face upward.

[0008] Preferably, the lower side of the glue tube of the glue outlet pipe in the upper set of glue coating roller guide seat and the upper side of the glue tube of the glue outlet pipe in the other set of glue coating roller guide seat are in the same plane as the lower side of the remaining glue tubes of the upper set of glue coating rollers and the upper side of the remaining glue tubes of the lower set of glue coating rollers when the springs of the two sets of detection mechanisms are not compressed.

[0009] Preferably, the upper end of the force-bearing surface of the pressure sensor contacts the lower end of the glue bonding plate.

[0010] Preferably, the control circuit includes electrically connected resistors, adjustable resistors, and a single-chip microcomputer module, one end of the two adjustable resistors is respectively connected to one end of the two resistors and two signal input ends of the single-chip microcomputer module, and the other end of the two resistors is connected to the negative power input end of the single-chip microcomputer module; the single-chip microcomputer module can also be replaced by one of a PLC and a host computer.

[0011] Preferably, the prompt circuit includes an electrically connected single-chip microcomputer module and an adjustable resistor, a resistor, and an alarm, the power input end of the alarm is connected to the power output end of the single-chip microcomputer module, one end of the adjustable resistor is connected to one end of the resistor and the signal input end of the single-chip microcomputer module, and the negative power input end of the single-chip microcomputer module is connected to the other end of the resistor.

[0012] A gluing method for a gluing device for producing corrugated paperboard, characterized in that it comprises the following steps: S1: feeding a core paper interlayer to be glued from between the rear ends of two guide rollers at the rear end, and the two guide rollers at the front end pull the core paper interlayer to move forward after gluing; S2: an air compressor outputs compressed air into a glue tank, and glue with pressure enters the interior of two glue rollers through two valves respectively, and the lower side of the glue tube of the upper glue roller and the upper side of the glue tube of the lower glue roller synchronously output glue with pressure to synchronously glue the upper and lower layers of the core paper interlayer; S3: pressure resistors of two sets of detection mechanisms synchronously detect the pressure applied to the upper and lower layers of the core paper interlayer by one of the glue tubes of the two sets of glue rollers, and when the pressure is too large, the electric push rod can be controlled to drive the upper set of glue rollers upward and the lower set of glue rollers downward respectively, and when the pressure is too small, the electric push rod can be controlled to drive the upper set of glue rollers downward and the lower set of glue rollers upward respectively, so as to ensure the gluing effect and reduce the probability of damaging the core paper interlayer.

[0013] Preferably, in step S2, an upper set of glue coating rollers applies glue to the wavy convex parts of the core paper interlayer, and a lower set of glue coating rollers applies glue to the lower flat parts of the core paper interlayer.

[0014] Preferably, in step S2, the pressure switch can monitor the pressure in the glue tank. When the pressure is lower than a threshold, the second solenoid valve opens and the air compressor pressurizes the glue tank. When the pressure is higher than the threshold, the second solenoid valve closes and the air compressor no longer pressurizes the glue tank.

[0015] Preferably, in step S2, the glue amount detection mechanism monitors the glue amount of the lower set of glue rollers in real time, and can alarm the staff and adjust the opening and closing degree of the valve core of the second valve when the glue amount is too much to prevent glue waste.

[0016] Compared with the prior art, the present invention has the following advantages: (1) Based on two sets of electrically driven guide rollers respectively arranged at the front and rear ends of the working area, the present invention can synchronously apply glue to the upper and lower layers of the core paper interlayer through two vertically distributed glue coating rollers during operation, thereby improving work efficiency, and the applied production equipment is relatively simple and low in cost. Under the action of two sets of detection mechanisms, etc., it can also effectively ensure that the glue outlet holes of the upper and lower glue coating rollers fit the gluing parts of the core paper interlayer, thereby improving the gluing quality; (2) Due to the action of gravity and the absence of shielding effect of the core paper interlayer, when there is too much glue in the glue box, the glue coating rollers at the lower end will drip onto the glue connection plate of the glue residual amount detection mechanism. When too much glue drips per unit time, the prompt circuit and alarm can be used to prompt the staff to adjust the glue output amount of the second manual valve, thereby preventing glue waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 It is a schematic diagram of the overall structure of a gluing device for producing corrugated paperboard according to the present invention;

[0019] Figure 2 It is a partial structural schematic diagram of a gluing device for producing corrugated paperboard according to the present invention;

[0020] Figure 3 The invention discloses a circuit diagram of a gluing device for producing corrugated paperboard. DETAILED DESCRIPTION

[0021] Figure 1-Figure 3As shown in the figure, a gluing device for corrugated cardboard production includes two sets of electric drive guide rollers 1 with two guide rollers distributed up and down respectively arranged at the front and rear ends of the working area, a power module T1, a glue supply mechanism, a gluing roller 3, an electric push rod, an air compressor (not shown in the figure), solenoid valves DC1 and DC2, and also has a detection mechanism, a control circuit 4 and a glue amount detection mechanism; the gluing roller 3 has two sets and the electric push rod has four sets, the left end of the gluing roller 3 is a closed structure, and the right end has a glue inlet 31, the lower end of the gluing roller 3 is vertically welded with a glue outlet pipe 32 interconnected with the inside at a certain distance, and the lower end of each glue outlet pipe 32 is horizontally welded with a glue outlet pipe 32 interconnected with the inside The glue coating tubes 33 are interconnected, and the lower ends of each glue coating tube 33 are spaced apart and have multiple glue outlet holes 34; the upper ends of the push columns of two of the electric push rods M1 are respectively welded to the left and right sides of the lower end of one of the glue coating rollers 3, and the glue coating tube 33 of one of the glue coating rollers is located on the lower side, and the upper ends of the push columns of the other two sets of electric push rods M2 are respectively welded to the left and right sides of the lower end of the other set of glue coating rollers 3, and the glue coating tube 33 of the other set of glue coating rollers is located on the upper side; the rear sides of the cylinders of two of the two sets and the other two sets of electric push rods are respectively installed on the upper and lower front sides of the left and right end support frames 101 of a set of electric drive guide rollers at the rear end, and one set and the other set of glue coating rollers The glue coating pipe 33 of the glue roller is respectively located between the lower side of the upper guide roller 1 and the upper side of the lower guide groove 1; there are two solenoid valves, and the right sides of the glue inlets 31 of the two sets of glue coating rollers 3 are respectively connected to one end of a manual valve 5 through threads, and the other ends of the two manual valves 5 are respectively connected in series through a soft rubber tube 6 (to ensure that the electric push rod can drive the glue coating roller up or down to a certain extent) and a three-way pipe, the two ends of which are respectively connected through pipes, and the third end of the three-way pipe is connected to one end of the first solenoid valve DC1 through a pipe, and the other end of the first solenoid valve DC1 is threadedly installed with a glue inlet pipe 7; the glue supply mechanism includes a glue tank 21, a glue delivery pipe 22, a pressure switch D, a glue adding pipe 23, a glue tank 21 is installed on the right side of a set of electric drive guide rollers 1 at the rear end, the lower end of the glue adding hose 23 and the lower end of the air inlet pipe of the pressure switch D, and the connecting pipe of the lower end of the second solenoid valve DC2 are respectively welded to the left and right sides of the upper end of the glue box 21, and the glue adding hose 23 and the air inlet pipe of the pressure switch D, the connecting pipe of the second solenoid valve DC2 and the glue box 21 are interconnected, a sealing cover 24 is installed on the upper end of the glue adding hose 21 through threads, the right side of the glue outlet hose 22 is welded to the middle of the lower left end of the glue box 21, the left side of the glue delivery hose 22 and the right side end of the glue inlet hose 7 of the first solenoid valve are installed together through a pipeline joint, and the other end of the second solenoid valve DC2 is connected to the exhaust pipe of the air compressor through a pipeline;The detection mechanism includes two sets, each set of detection mechanism includes a spring 81, a pressure resistor RT1 (RT2), a cylindrical guide seat 35 interconnected with the interior is welded in the middle of the two sets of glue coating rollers, one end of a rubber outlet pipe 32 of the two sets of glue coating rollers is slidably sealed in the guide seat 35, and the outer side of the other end of the rubber outlet pipe located on the inner side of the guide roller is welded with a hollow limit plate 36 (to prevent the rubber outlet pipe from escaping from the guide seat), and a support plate 37 is welded horizontally on the right side of the rubber outlet pipe. One end of the spring 81 of the two sets of detection mechanisms is respectively welded to the two support plates 37, and the right outer ends of the two guide seats are respectively welded with fixing plates 38. The pressure of the two detection mechanisms The resistors RT1 (RT2) are insulated and installed on the two fixed plates 38 respectively; the glue amount detection mechanism includes a glue connection plate 91, a linear bearing 92, a pressure sensor T3, and a prompt circuit 93. The bearing seat sleeves of the two sets of linear bearings 92 (the bearing rods are slidably sleeved in the bearing seat sleeves) are respectively installed in the middle of the inner side of the two support frames 101 of the rear end set of electric drive guide rollers, and the upper ends of the bearing rods of the two sets of linear bearings 92 are respectively installed at the lower end of the glue connection plate 91, and the pressure sensor T3 is installed at the rear side end of the bearing seat sleeve of the left end linear bearing 92; the power module T1, the control circuit 4, and the prompt circuit 93 are installed on the circuit board in the control box 10, and the control box 10 is installed at the front outer side of the glue box 21. ;

[0022] Figure 1-Figure 3As shown in the figure, the solenoid valves DC1 and DC2 are normally closed valve core solenoid valves; glue is added to the glue box 21 through the glue adding tube 23 after the sealing cover 24 is opened; the other ends of the springs 81 of the two detection mechanisms are in contact with the force-bearing surfaces of the pressure resistors RT1 (RT2) of the two detection mechanisms, respectively, with the force-bearing surface of the pressure resistor RT1 of the upper detection mechanism facing downward and the force-bearing surface of the pressure resistor RT2 of the lower detection mechanism facing upward. The lower side of the glue-bearing tube 33 of the glue-discharging tube in the middle guide seat of the upper set of glue-coating rollers 3 and the upper side of the glue-bearing tube 33 of the glue-discharging tube in the middle guide seat of the lower set of glue-coating rollers are in the same plane with the lower side of the glue-bearing tube 33 of the remaining glue-discharging tubes of the upper set of glue-coating rollers and the upper side of the glue-bearing tube 33 of the remaining glue-discharging tubes of the lower set of glue-coating rollers when the springs 81 of the two detection mechanisms are not compressed. The upper end of the force-bearing surface of the pressure sensor T3 is in contact with the left side of the lower end of the glue-connecting plate 91. The control circuit includes resistors R1 and R2, adjustable resistors RP1 and RP2, and a single-chip computer module T2 connected by wires. One end of the two adjustable resistors RP1 and RP2 is respectively connected to one end of the two resistors R1 and R2 and two signal input terminals 3 and 4 of the single-chip computer module T2. The other end of the two resistors R1 and R2 is connected to the negative power input terminal 2 of the single-chip computer module T2. The single-chip computer module can also be replaced by one of the PLC and the host computer. The prompt circuit includes a single-chip computer module T4 and an adjustable resistor RP3, a resistor R3, and an alarm BT connected by circuit board wiring. The power input terminal of the alarm BT is connected to the power output terminals 4 and 5 of the single-chip computer module T4. One end of the adjustable resistor RP3 is connected to one end of the resistor R3 and the signal input terminal 3 of the single-chip computer module T4. The negative power input terminal 2 of the single-chip computer module T4 is connected to the other end of the resistor R3. Figure 3 The adjustable resistors RP1, RP2, and RP3 have a resistance of 100K (adjusted to 19K, 19K, and 9K, respectively, in this embodiment); the resistances of resistors R1, R2, and R3 are 3K, 3K, and 2K, respectively; the power module T1 is an AC 220V to DC 24V power module; the solenoid valves DC1 and DC2 are 1W normally closed valve core solenoid valves; the pressure switch D is an adjustable normally closed contact pressure switch; the electric tow rods M1 and M2 are 100W reciprocating electric telescopic rods; the alarm BT is a high-decibel continuous sound alarm of model SFM-27; the single-chip microcomputer modules T2 and T4 are models STM32F103C8T6; the pressure sensor T3 is a high-precision pressure weighing sensor finished product of model DYZ-100, which has two power input terminals and one signal output terminal; the pressure resistors RT1 and RT2 are high-precision resistive strain gauges of model BX120-3AA.

[0023] Figure 1-Figure 3As shown in the figure, the power input terminals 1 and 2 of the power module T1 and the two poles of the AC 220V power supply are connected via wires, the power output terminals 3 and 4 of the power module T1 and the power input terminals 1 and 2 of the pressure sensor T3, the power input terminals 1 and 2 of the single-chip module T4 of the prompt circuit, the power input terminals 1 and 2 of the single-chip module T2 of the control circuit, and the power input terminal of the pressure switch D are connected via wires, and the power output terminal of the pressure switch D and the negative power output terminal 4 of the power module T1 are connected to the power input terminal of the second solenoid valve DC2 via wires. The power input terminal of the first solenoid valve DC1 is connected in series with the power output terminals 3 and 4 of the power module T1 via a power switch S1 and connected via wires. The signal output terminal 3 of the pressure sensor T3 and the other end of the adjustable resistor RP3 of the signal input terminal of the prompt circuit are connected through a wire, one end of the two pressure resistors RT1 and RT2 and the positive power input terminal of the single-chip module T2 are connected through a wire, and the other ends of the two pressure resistors RT1 and RT2 and the other ends of the adjustable resistors RP1 and RP2 are connected through wires. The 5th and 6th pins and the 7th and 8th pins, the 9th and 10th pins and the 11th and 12th pins of the single-chip module T2 of the four-way power output terminal of the control circuit and the positive and negative and negative and positive and negative power input terminals of two sets of electric push rods M1 and the other two sets of electric push rods M2 are connected through wires.

[0024] Figure 1-Figure 3As shown in , after the AC 220V power supply enters the power input terminal of the power module T1, the 3rd and 4th pins of the power module T1 output a stable DC 24V power supply and enter the power input terminal of the pressure sensor T3, the prompt circuit, the control circuit, and the pressure switch D. After opening the power input terminals of the two sets of electric drive guide rollers 1, the staff feeds the core paper sandwich to be glued from between the two guide rollers 1 at the rear end, and the two guide rollers 1 at the front end pull the core paper sandwich to move forward after gluing (the front guide rollers also have the function of dispersing glue evenly), and enter the next core paper sandwich lower end gluing process, and finally enter the core paper sandwich and two layers of cardboard bonding and drying process. Open the valve cores of the two manual valves 5 (and turn on the power switch S1 of the solenoid valve DC1, so that the valve core of the solenoid valve DC1 is powered on), the air compressor outputs compressed air into the glue tank 21, and the pressurized glue enters the two glue rollers 3 through the two manual valves 5 respectively, and the multiple glue holes on the lower side of the glue tube 33 at the lower end of the upper glue roller and the multiple glue holes on the upper side of the glue tube 33 at the upper end of the lower glue roller synchronously output glue with a certain flow rate and pressure to synchronously glue the upper and lower layers of the core paper interlayer. In actual situations, when the height of the upper or lower end of the core paper interlayer changes, one of the upper glue pipes or one of the lower glue pipes will change synchronously with the change of the height of the upper or lower end of the core paper interlayer through the glue pipe (when the upper end height of the core paper interlayer becomes higher or the lower end height becomes lower, one of the upper glue pipes goes up along the guide seat and the lower glue pipe goes down along the guide seat). When the distance between the two sets of detection mechanisms at the upper or lower end of the glue-coated tube and the core paper interlayer is relatively large (or the contact area between the two sets of glue-coated tubes and the upper or lower end of the core paper interlayer is very small), since the spring 81 of the upper or lower set of detection mechanisms compresses the force surface of the upper pressure resistor RT1 or the lower pressure resistor RT2, the resistance value of the upper pressure resistor RT1 or the lower pressure resistor RT2 is relatively large, and the voltage divided by the 24V power supply through the pressure resistor RT1, the adjustable resistor RP1 and the resistor R1 is large, or the voltage divided by the 24V power supply through the pressure resistor RT2, the adjustable resistor RP2 and the resistor R2 is relatively large, so the voltage signal entering the 3rd or 4th pin of the microcontroller module T2 is relatively low (for example, lower than 3V).When the distance between the two sets of detection mechanisms at the upper or lower end of the glue-coated tube and the core paper interlayer is relatively small (or the contact area between the two sets of glue-coated tubes and the upper or lower end of the core paper interlayer is large), since the spring 81 of the upper or lower set of detection mechanisms compresses the force surface of the upper pressure resistor RT1 or the lower pressure resistor RT2 to be relatively high (after the spring is compressed, although it can absorb part of the force, the force acting on the pressure resistor will still increase), the resistance value of the pressure resistor RT1 or the pressure resistor RT2 is relatively small, and the voltage divided by the 24V power supply through the pressure resistor RT1, the adjustable resistor RP1 and the resistor R1 is small, or the voltage divided by the 24V power supply through the pressure resistor RT2, the adjustable resistor RP2 and the resistor R2 is small, so the voltage signal entering the 3rd or 4th pin of the single-chip module T2 is relatively high (for example, higher than 3V). When the distance between the two sets of detection mechanisms at the upper or lower end of the glue-coated tube and the core paper interlayer is appropriate (that is, the contact surface between the two sets of glue-coated tubes and the upper or lower end of the core paper interlayer is appropriate and just completely in contact), the force exerted by the spring 81 of the upper or lower set of detection mechanisms compressing the force-bearing surface of the pressure resistor RT1 or the pressure resistor RT2 is relatively appropriate, the resistance value of the pressure resistor RT1 or the lower pressure resistor RT2 is relatively appropriate, the 24V power supply is appropriately divided through the pressure resistor RT1, the adjustable resistor RP1 and the resistor R1, or the 24V power supply is appropriately divided through the pressure resistor RT2, the adjustable resistor RP2 and the resistor R2, so that the voltage signal entering the 3rd or 4th pin of the microcontroller module T2 is relatively appropriate (for example, 3V). When the voltage signal input to pin 3 or 4 of the single-chip microcomputer module T3 is lower than 3V, pins 5 and 6 or pins 11 and 12 of the single-chip microcomputer module T3 will respectively output power to the positive and negative power input terminals of two sets of electric push rods M1 or the negative and positive power input terminals of the other two sets of electric push rods M2. The two sets of electric push rods M1 drive a set of glue coating rollers at the upper end downward, and the other two sets of electric push rods M2 drive a set of glue coating rollers at the lower end upward. When the spacing is appropriate, when the signal voltage entering pin 3 or 4 of the single-chip microcomputer module is at 3V, pins 5 and 6 or pins 11 and 12 of the single-chip microcomputer module T3 stop outputting power, and the distance between the glue coating tubes of the two detection mechanisms and the upper or lower ends of the core paper interlayer is in an appropriate state. When the voltage signal output by pin 3 or 4 of the single-chip microcomputer module T3 is higher than 3V, pins 7 and 8 or pins 9 and 10 of the single-chip microcomputer module T3 will respectively output power to the positive and negative power input terminals of two sets of electric push rods M1 or the positive and negative power input terminals of the other two sets of electric push rods M2. The two sets of electric push rods M1 drive the upper set of glue coating rollers upward, and the other two sets of electric push rods M2 drive the lower set of glue coating rollers downward. When the spacing is appropriate, when the signal voltage entering pin 3 or 4 of the single-chip microcomputer module is at 3V, pins 7 and 8 or pins 9 and 10 of the single-chip microcomputer module T3 stop outputting power, and the distance between the glue coating tubes of the two detection mechanisms and the upper or lower ends of the core paper interlayer is in an appropriate state.Through the above, when the present invention is working, the upper and lower layers of the core paper sandwich can be glued synchronously through two sets of glue rollers vertically distributed up and down, which improves the work efficiency, and the applied production equipment is relatively simple and low-cost. Under the action of two sets of detection mechanisms, it can also effectively ensure that the glue outlet holes of the upper and lower glue rollers fit the glue coating parts of the core paper sandwich, thereby improving the glue coating quality. In actual situations, the technicians modify the program data inside the single-chip module T2 respectively, and can set the input voltage signal to be relatively large or relatively small, and the corresponding four-way power output end outputs power, that is, the distance between the glue tubes of the two sets of detection mechanisms and the upper or lower ends of the core paper sandwich and the contact force threshold can be set according to needs to meet better glue coating effects. It should be noted that the height of the lateral interface of the upper or lower end of the core paper interlayer is respectively consistent. When the glue coating tubes of the two sets of glue coating rollers contact the upper or lower end of the core paper interlayer respectively and the height of the upper or lower end of the core paper interlayer becomes higher or lower respectively, the remaining glue coating tubes of the two sets of glue coating rollers will compress and deform other corresponding positions of the upper or lower end of the core paper interlayer. Therefore, the present invention can automatically adjust the height of the glue coating tubes of the upper and lower glue coating rollers when the height of the upper or lower end of the core paper interlayer becomes higher or lower respectively, and can also provide good protection for the core paper interlayer.

[0025] Figure 1-Figure 3As shown, in the present invention, when the air pressure in the glue tank 21 is lower than a certain level (for example, lower than 0.2MPa), the internal contacts of the pressure switch D are closed, so that the valve core of the electromagnetic valve DC2 is energized and opened, and the compressed air output by the air compressor enters the glue tank 21; when the air pressure in the glue tank 21 is higher than a certain level (for example, higher than 0.2MPa), the internal contacts of the pressure switch D are open, so that the valve core of the electromagnetic valve DC2 is de-energized and opened, and the compressed air output by the air compressor no longer enters the glue tank 21. Through the above, the present invention can always keep the glue at a suitable pressure, and keep the glue tubes of the two sets of glue rollers under a constant pressure state to stably output glue (the staff adjusts the opening and closing degree of the valve cores of the two sets of manual valves respectively, so that the amount of glue and the pressure entering the two sets of glue rollers are in a suitable state). When the lower glue coating roller is coating the core paper interlayer with glue, if the lower set of glue coating rollers outputs too much glue, it will drip onto the glue connecting plate 91 of the glue residual amount detection mechanism, and the weight of the glue will act on the force surface of the pressure sensor T3 (linear bearing guide) through the glue connecting plate 91. When the amount of glue on the glue connecting plate 91 of the pressure sensor T3 is more, the voltage signal output from its pin 3 is relatively high, and vice versa. When the production time period is not large and the amount of glue dripping is not much, the voltage signal output from pin 3 of the pressure sensor T3 enters the signal input terminal pin 3 of the single-chip module T4 through the adjustable resistor RP3 and the resistor R3 for voltage division, and the voltage is relatively low (for example, lower than 2V), and the pins 4 and 5 of the single-chip module T4 do not output power, and the alarm BT will not sound. During the production period, when there is a relatively large amount of glue dripping, the voltage signal output from pin 3 of the pressure sensor T3 is divided by the adjustable resistors RP3 and R3 and enters the microcontroller module T4, and the signal voltage is relatively high (for example, higher than 2V). Pins 4 and 5 of the microcontroller module T4 output power to the power input terminal of the alarm BT. The alarm BT will be energized and sound to remind the staff to adjust the second manual valve to reduce the amount of glue output, thereby preventing glue waste.

[0026] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes that fall within the meaning and scope of the equivalent elements of the claims are included in the present invention.

[0027] In addition, it should be understood that although the present specification is described according to the implementation mode, the implementation mode does not only include an independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in the embodiments can also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A gluing device for corrugated board production, comprising an electric drive guide roller, a glue supply mechanism, a gluing roller, an electric push rod, an air compressor, and a solenoid valve, characterized in that: It also has a detection mechanism, a control circuit and a glue residue detection mechanism; the glue coating rollers have at least two sets and the electric push rods have multiple sets. One end of the glue coating roller is a closed structure and the other end has a glue inlet. The lower end of the glue coating roller is installed with a glue outlet pipe at a distance. The lower end of each glue outlet pipe is installed with a glue coating pipe, and the lower end of each glue coating pipe has multiple glue outlet holes; among the multiple sets of electric push rods, the upper ends of two sets and the other two sets of electric push rods are respectively installed with the outer ends of both sides of the two sets of glue coating rollers; the multiple sets of electric push rods are respectively installed on the upper and lower front ends of the support frames on both sides of a set of electric drive guide rollers at the rear end, and the glue coating of one set and the other set of glue coating rollers The tubes are respectively located between the lower side of the upper guide roller and the upper side of the lower guide groove; there are at least two solenoid valves, and the glue inlets of the two sets of glue coating rollers are respectively connected to one end of a valve, and the other ends of the two valves are respectively connected in series with one end of the first solenoid valve through hoses; the glue supply mechanism includes a glue tank, a glue delivery hose, a pressure switch, and a glue adding hose. The glue tank is installed on the side of a set of electric drive guide rollers at the rear end, the lower ends of the air inlet pipes of the glue adding hose and the pressure switch, and one end of the second solenoid valve are respectively installed at the upper end of the glue tank, a sealing cover is installed at the upper end of the glue adding hose, one end of the glue delivery hose is installed at the lower end of one side of the glue tank, and the other end of the glue delivery hose is connected to the other end of the first solenoid valve The first end of the second solenoid valve is connected to the exhaust pipe of the air compressor; the detection mechanism includes at least two sets, each set of detection mechanism includes a spring, a pressure resistor, two sets of glue rollers are installed with a guide seat, one end of the glue outlet pipe of the two sets of glue rollers is slidably sealed in the guide seat, one side of one of the glue outlet pipes is installed with a support plate, one end of the spring of the two detection mechanisms is respectively installed on the support plate, the outer ends of the two guide seats are respectively installed with a fixed plate, and the pressure resistors of the two detection mechanisms are respectively installed on the two fixed plates; the glue amount detection mechanism includes a glue connection plate, a linear bearing and a pressure sensor, a prompt circuit, a linear bearing, a pressure sensor ... The bearing seat sleeve of the linear bearing is installed on the inner side of the support frame of a set of electric drive guide rollers at the rear end, the upper end of the bearing rod of the linear bearing is installed at the lower end of the glue plate, and the pressure sensor is installed on the side end of the bearing seat of the linear bearing; the control circuit and the prompt circuit are installed in the control box; the power supply output end of the pressure switch is electrically connected to one end of the power supply input of the second solenoid valve, the signal output end of the pressure sensor is electrically connected to the signal input end of the prompt circuit, the signal output ends of the two pressure resistors are electrically connected to the two signal input ends of the control circuit respectively, and the multi-way power supply output end of the control circuit is electrically connected to the power supply input ends of multiple sets of electric push rods respectively.

2. The gluing equipment for corrugated board production according to claim 1, characterized in that: The solenoid valve is a normally closed valve core solenoid valve; glue is added to the glue box; the other ends of the springs of the two sets of detection mechanisms are respectively in contact with the pressure resistor force surfaces of the two sets of detection mechanisms, the pressure resistor force surface of the upper set of detection mechanisms faces downward, and the pressure resistor force surface of the lower set of detection mechanisms faces upward.

3. The gluing equipment for corrugated board production according to claim 1, characterized in that: The lower side of the glue pipe of the glue outlet pipe in the upper set of glue coating roller guide seat and the upper side of the glue pipe of the glue outlet pipe in the other set of glue coating roller guide seat are in the same plane as the lower side of the remaining glue coating pipes of the upper set of glue coating rollers and the upper side of the remaining glue coating pipes of the lower set of glue coating rollers when the springs of the two sets of detection mechanisms are not compressed.

4. The gluing equipment for corrugated board production according to claim 1, characterized in that: The upper end of the force-bearing surface of the pressure sensor contacts the lower end of the adhesive bonding plate.

5. The gluing equipment for corrugated board production according to claim 1, characterized in that: The control circuit includes electrically connected resistors, adjustable resistors, and a single-chip microcomputer module. One end of the two adjustable resistors is respectively connected to one end of the two resistors and two signal input ends of the single-chip microcomputer module, and the other end of the two resistors is connected to the negative power input end of the single-chip microcomputer module. The single-chip microcomputer module can also be replaced by one of a PLC and a host computer.

6. The gluing equipment for corrugated board production according to claim 1, characterized in that: The prompt circuit includes an electrically connected single-chip microcomputer module and an adjustable resistor, a resistor, and an alarm. The power input end of the alarm is connected to the power output end of the single-chip microcomputer module, one end of the adjustable resistor is connected to one end of the resistor and the signal input end of the single-chip microcomputer module, and the negative power input end of the single-chip microcomputer module is connected to the other end of the resistor.

7. A gluing method for gluing equipment for corrugated board production according to any one of claims 1 to 6, characterized in that: The method comprises the following steps: S1: feeding the core paper interlayer to be coated with glue from between the rear ends of the two guide rollers at the rear end, and the two guide rollers at the front end pull the core paper interlayer to move forward after being coated with glue; S2: the air compressor outputs compressed air into the glue tank, and the pressurized glue enters the inside of the two glue coating rollers through two valves respectively, and the lower side of the glue coating tube of the upper glue coating roller and the upper side of the glue coating tube of the lower glue coating roller synchronously output pressurized glue to synchronously coat the upper and lower layers of the core paper interlayer; S3: the pressure resistors of the two sets of detection mechanisms synchronously detect the pressure applied to the upper and lower layers of the core paper interlayer by one of the glue coating tubes of the two sets of glue coating rollers. When the pressure is too large, the electric push rod can be controlled to drive the upper set of glue coating rollers to move upward and the lower set of glue coating rollers to move downward respectively. When the pressure is too small, the electric push rod can be controlled to drive the upper set of glue coating rollers to move downward and the lower set of glue coating rollers to move upward respectively, so as to ensure the gluing effect and reduce the probability of damaging the core paper interlayer.

8. The gluing method of a gluing device for producing corrugated board according to claim 7, characterized in that: In step S2, a set of glue coating rollers at the upper end applies glue to the wavy convex parts of the core paper interlayer, and a set of glue coating rollers at the lower end applies glue to the flat lower part of the core paper interlayer.

9. The gluing method of a gluing device for producing corrugated board according to claim 7, characterized in that: In step S2, the pressure switch can monitor the pressure in the glue tank. When the pressure is lower than the threshold, the second solenoid valve opens and the air compressor pressurizes the glue tank. When the pressure is higher than the threshold, the second solenoid valve closes and the air compressor no longer pressurizes the glue tank.

10. The gluing method of a gluing device for producing corrugated board according to claim 7, characterized in that: In step S2, the glue amount detection mechanism monitors the glue amount of the lower set of glue rollers in real time. When the glue amount is too much, it can alarm the staff and adjust the opening and closing degree of the valve core of the second valve to prevent glue waste.

Images