Plywood glue spraying equipment

Abstract

The present invention discloses a plywood glue spraying device, including a glue storage system, a glue spraying system and a glue feeding system, wherein the glue storage system includes a first frame and a glue storage tank; the glue spraying system includes a second frame and a glue spraying device arranged on the second frame; the glue feeding system includes a glue conveying device for conveying glue in the glue storage tank to the glue spraying device and a heat preservation device for ensuring constant temperature conveying of the glue; and also includes a gas conveying device for supplying air to each nozzle. The plywood glue spraying device of the present invention can deliver glue at a constant temperature to prevent the glue from solidifying due to temperature reduction during the conveying process, thereby ensuring the fluidity and viscosity of the glue. In addition, the plywood glue spraying device uses a nozzle spraying method to apply glue to the slab at the gluing station, which is not only fast, but also can evenly spray the glue at various positions of the slab at the same time, so that the degree of curing of the glue at various positions on the slab is consistent, thereby improving the spraying effect.

Description

Technical Field

[0001] The invention relates to plywood processing equipment, in particular to plywood glue spraying equipment. Background Art

[0002] Plywood is a three-layer or multi-layer plate material made by peeling wood segments into veneers or planing wood blocks into thin wood, and then gluing them with adhesives. It usually uses an odd number of veneers, and the fiber directions of adjacent veneers are glued perpendicular to each other. Plywood is one of the common materials for furniture and one of the three major wood-based panels. It can also be used as a material for airplanes, ships, trains, cars, buildings, and packaging boxes. A group of veneers is usually assembled and glued in such a way that the grain directions of adjacent layers are perpendicular to each other. Usually, the surface board and the inner layer board are symmetrically arranged on both sides of the center layer or the core of the board. The veneers coated with glue are staggered in the direction of the wood grain, and pressed under heating or non-heating conditions. The number of layers is generally odd, and a few have even numbers. The physical and mechanical properties in the longitudinal and transverse directions are slightly different. Common types of plywood include three-ply board and five-ply board. Plywood can improve the utilization rate of wood and is a major way to save wood.

[0003] In the process of plywood processing, it is necessary to compound multiple single sheets by adhesive. For this reason, a series of plywood gluing machines have appeared on the market, such as the invention patent application with the authorization announcement number CN109333691A disclosed "a plywood glue spraying process device", the plywood glue spraying process device includes a body, the body is a central symmetrical structure, one side of the body is fixedly provided with a fixed rod, the other side of the body is fixedly provided with a support plate, one side of the fixed rod is fixedly provided with a plug rod, one side of the plug rod is provided with a clamping block, the inside of the clamping block is provided with a slot, the slot is matched with the plug rod, and the plug rod is sleeved with a reset spring, one end and the other end of the reset spring are elastically connected to the clamping block and the fixed rod respectively, and the fixed rod is fixedly connected with a connecting rod. The present invention starts working by turning on the heater switch to heat the glue in the storage box, the glue heating can improve its viscosity, and can also soften the glue, and the glue pump switch is turned on to start the glue pump to pump the glue in the storage boxes on both sides to the nozzle for spraying.

[0004] However, the above-mentioned plywood spraying process device only heats the glue in the storage box to soften it. However, during the glue transportation process, the heat in the glue will continue to dissipate when the glue is transported in the glue transportation pipeline, causing the temperature of the glue to continue to drop. When the length of the glue transportation pipeline increases, this change is more obvious. In this way, the glue will continue to solidify during the transportation process, thereby affecting the fluidity and viscosity of the glue. Summary of the invention

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a plywood glue spraying device, which can deliver glue at a constant temperature to prevent the glue from solidifying due to temperature reduction during the transportation process, thereby ensuring the fluidity and viscosity of the glue. In addition, the plywood glue spraying device uses a nozzle spraying method to apply glue to the slab at the gluing station, which is not only fast, but also can evenly spray the glue at various positions of the slab at the same time, so that the degree of curing of the glue at various positions on the slab is consistent, thereby improving the spraying effect.

[0006] The technical solution of the present invention to solve the above technical problems is:

[0007] A plywood glue spraying device comprises a glue storage system, a glue spraying system and a glue delivery system for delivering glue in the glue storage system to the glue spraying system, wherein:

[0008] The glue storage system comprises a first frame and a glue storage tank arranged on the first frame;

[0009] The glue spraying system comprises a second frame and a glue spraying device arranged on the second frame, wherein the glue spraying device comprises a bracket arranged on the second frame, a glue spraying module arranged on the bracket, and a control module for controlling the flow rate of glue sprayed by multiple glue spraying modules to be consistent, wherein the glue spraying modules are multiple groups, and the multiple groups of glue spraying modules are evenly arranged on the bracket along the extension direction of the second frame; each group of glue spraying modules comprises a nozzle;

[0010] The glue delivery system includes a glue delivery device for delivering glue in the glue storage tank to the glue spraying device and a heat preservation device for ensuring constant temperature delivery of the glue, wherein:

[0011] The glue delivery device includes a glue delivery pipeline and a glue delivery mechanism for driving the glue to move in the glue delivery pipeline, wherein the glue delivery pipeline includes a glue manifold and a glue delivery pipe, wherein the glue manifold is arranged on the bracket and extends along the length direction of the second frame; the liquid inlet of each nozzle is connected to the glue manifold; the glue delivery pipe is used to connect the glue manifold and the storage tank to realize the transitional delivery of glue between the glue storage tank and the glue manifold;

[0012] The heat preservation device comprises a first heating interlayer arranged on the glue storage tank for heating the glue in the glue storage tank, a second heating interlayer for heating the glue in the glue delivery pipe, a hot water supply device and a hot water circulation delivery device for driving hot water to circulate in the first heating interlayer and the second heating interlayer, wherein the first heating interlayer is wrapped on the outer wall of the glue storage tank, and the second heating interlayer is wrapped on the outer wall of the glue delivery pipe; the hot water supply device, the first heating interlayer, the second heating interlayer and the hot water circulation delivery device form a closed loop;

[0013] It also includes a gas delivery device for supplying gas to each nozzle, the gas delivery device includes a gas manifold and a gas delivery mechanism for driving the gas to move to the gas manifold; wherein the gas manifold is arranged on the bracket and extends along the length direction of the second frame; the air inlet of each nozzle is connected to the gas manifold.

[0014] Preferably, the glue storage tank includes an outer tank body arranged on the first frame and an inner tank body arranged inside the outer tank body, wherein the gap between the outer tank body and the inner tank body constitutes the first heating interlayer; the glue delivery pipeline includes an inner pipeline and an outer pipeline, and the gap between the inner pipeline and the outer pipeline constitutes the second heating interlayer.

[0015] Preferably, the hot water circulation and delivery device comprises a hot water delivery pump and a hot water delivery pipeline, wherein the hot water delivery pump, the first heating interlayer, the second heating interlayer, and the hot water supply device are connected through the hot water delivery pipeline.

[0016] Preferably, a stirring device for stirring the glue is provided on the first frame, and the stirring device comprises a stirring rod and a stirring motor for driving the stirring rod for stirring, wherein the stirring rod extends downward into the inner tank body.

[0017] Preferably, the control module includes a liquid pressure reducing valve arranged between the glue manifold and each nozzle and a gas pressure reducing valve arranged between the gas manifold and each nozzle, wherein the liquid pressure reducing valve is used to control the flow rate of the glue entering each nozzle to remain consistent; and the gas pressure reducing valve is used to control the flow rate of the gas entering each nozzle to remain consistent.

[0018] Preferably, the glue spraying system also includes a vertical adjustment device for adjusting the height of the glue spraying device, wherein the vertical adjustment device includes a turbine screw lift arranged on a frame and a vertical drive mechanism for driving the turbine screw lift to work, wherein the turbine screw lift includes a screw transmission mechanism and a worm gear mechanism for driving the screw nut in the screw transmission mechanism to rotate; the vertical drive mechanism is driven by a motor or manually.

[0019] Preferably, it also includes a recycling system for recycling glue, wherein the recycling system includes a glue recycling box, a glue recycling tank for recycling glue arranged below the glue spraying device, and a glue recycling pipe connected to the glue recycling tank, wherein the glue recycling tank is installed on the second frame through a detachable connection structure, and the cross-sectional area of ​​the bottom of the glue recycling tank gradually decreases downward to form a guide part for guiding the glue to enter the glue recycling pipe; the inlet end of the glue recycling pipe is connected to the bottom of the glue recycling tank, and the outlet end is connected to the inlet end of the glue recycling box, and the outlet end of the glue recycling box is connected to the feed port of the glue storage tank; the outlet end of the glue recycling pipe is provided with a glue recovery control valve for opening or closing the outlet end of the glue recycling pipe; the bottom of the glue recycling tank is provided with a filter between the inlet end of the glue recycling pipe and the bottom of the glue recycling tank for filtering impurities in the recovered glue.

[0020] Preferably, the glue recovery box is provided with a diaphragm pump for delivering the glue in the glue recovery box into the glue storage tank, wherein a filter is provided between the liquid inlet end of the diaphragm pump and the outlet end of the glue recovery box; the gas inlet end of the diaphragm pump is connected to the air supply device through a gas delivery pipe, wherein a pressure reducing valve and a solenoid valve are provided between the gas inlet end of the diaphragm pump and the air supply device, wherein the pressure reducing valve is used to control the flow rate of the gas, and the solenoid valve is used to control the opening and closing of the gas delivery pipe.

[0021] Preferably, the glue spraying system also includes a cleaning device, wherein the cleaning device includes a first cleaning mechanism for cleaning the nozzle and a second cleaning mechanism for cleaning the glue manifold and the nozzle, when the glue spraying device is on standby, the first cleaning mechanism cleans each nozzle; when the glue spraying device is stopped, the second cleaning mechanism cleans the glue delivery mechanism and each nozzle.

[0022] Preferably, the first cleaning mechanism includes a cleaning liquid manifold and a cleaning liquid conveying mechanism for driving the cleaning liquid to move to the cleaning liquid manifold, wherein the cleaning liquid manifold is installed on the bracket and extends along the length direction of the second frame; a cleaning liquid control valve for controlling the opening or closing of the cleaning liquid manifold is provided at the inlet end of the cleaning liquid manifold; the cleaning liquid manifold is connected to the liquid inlet of each nozzle; the glue spraying module also includes a manual three-way ball valve arranged between the nozzle and the glue manifold and the cleaning liquid manifold, wherein the lower end of the manual three-way ball valve is connected to the liquid inlet of the nozzle, one of the other two ends of the manual three-way ball valve is connected to the glue manifold, and the other end is connected to the cleaning liquid manifold.

[0023] Preferably, the second cleaning mechanism includes a three-way reversing valve arranged between the glue storage tank and the glue conveying mechanism, wherein one end of the three-way reversing valve is connected to the outlet end of the glue storage tank, one of the other two ends is connected to the barreled cleaning liquid, and the other end is connected to the inlet end of the glue conveying mechanism.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. The glue delivery system in the present invention is provided with a first heating interlayer and a second heating interlayer, wherein the first heating interlayer is wrapped around the outer wall of the glue storage tank, and the second heating interlayer is wrapped around the outer wall of the glue delivery pipe, so that the hot water in the first heating interlayer can heat the glue in the glue storage tank and keep it within a predetermined temperature range, and the second heating interlayer heats the glue in the glue delivery pipe and keeps it within a predetermined temperature range, or makes the temperature of the glue in the glue storage tank consistent with the temperature of the glue in the glue delivery pipe, ensuring that the glue is transported under constant temperature conditions, thereby ensuring that the glue has good fluidity and viscosity, which can prevent the glue from solidifying and ensure the spraying effect.

[0026] 2. The glue delivery system of the present invention can ensure that the glue is temporarily stored and delivered at a constant temperature, thereby ensuring that the glue has good fluidity and viscosity, which is beneficial to the composite of the slab.

[0027] 3. The glue spraying system of the present invention has multiple groups of glue spraying modules, and the multiple groups of glue spraying modules are evenly arranged along the length direction of the frame, so that nozzles are arranged above each position of the slab, and the spraying range of these nozzles covers all positions on the slab; when spraying glue, all nozzles spray glue to the upper surface of the slab at the same time, so that the glue is sprayed on each position of the slab. Compared with the roller-type coating method, the glue spraying system of the present invention has a faster spraying speed and higher efficiency.

[0028] 4. Since the multiple glue spraying modules of the glue spraying system in the present invention spray glue onto the slab at the same time, the curing degree of the glue at each position of the slab is the same, thereby ensuring the bonding effect of the glue.

[0029] 5. Since the glue spraying system of the present invention mixes gas and glue in the nozzle before spraying, the volume of the sprayed glue particles is smaller and the spraying is more uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1-Figure 4 It is a structural schematic diagram of the plywood glue spraying equipment of the present invention, wherein: Figure 1 is a schematic diagram of the three-dimensional structure. Figure 2 For the main view, Figure 3 is a top view, Figure 4 It is the left view.

[0031] Figure 5 and Figure 6 Schematic diagram of the three-dimensional structure of the glue storage system, glue delivery system and recycling system from two different perspectives.

[0032] Figure 7-Figure 9 is a schematic diagram of the structure of the glue spraying system, wherein: Figure 7 is a schematic diagram of the three-dimensional structure. Figure 8 is a side view (section view), Fig. 9 This is a partial enlarged view.

[0033] Figure 10-12 is a schematic diagram of the structure of the glue spraying system (part of the frame is removed), wherein: Fig.10 and Fig.11 Schematic diagram of the three-dimensional structure from two different perspectives. Fig.12 This is a top view.

[0034] Fig.13 It is a structural block diagram of the plywood glue spraying equipment of the present invention. DETAILED DESCRIPTION

[0035] The present invention is further described in detail below in conjunction with embodiments and drawings, but the embodiments of the present invention are not limited thereto.

[0036] See also Figure 1-Figure 13 The plywood glue spraying equipment of the present invention comprises a glue storage system A, a glue spraying system C, a glue delivery system B for delivering glue in the glue storage system A to the glue spraying system C, and an integrated control cabinet E.

[0037] See also Figure 1-Figure 13 The glue storage system A includes a first frame and a glue storage tank 1 arranged on the first frame.

[0038] See also Figure 1-Figure 13 The glue spraying system C includes a second frame 47 and a glue spraying device arranged on the second frame 47, wherein the glue spraying device includes a bracket 46 arranged on the second frame 47, a glue spraying module arranged on the bracket 46, and a control module for controlling the flow rate of glue sprayed by multiple glue spraying modules to remain consistent, wherein the glue spraying modules are divided into multiple groups, and the multiple groups of glue spraying modules are evenly arranged on the bracket 46 along the extension direction of the second frame 47; each group of glue spraying modules includes a nozzle 40.

[0039] See also Figure 1-Figure 13 The glue delivery system B includes a glue delivery device for delivering the glue in the glue storage tank 1 to the glue spraying device and a heat preservation device for ensuring constant temperature delivery of the glue.

[0040] See also Figure 1-Figure 13The glue delivery device includes a glue delivery pipeline and a glue delivery mechanism for driving the glue to move in the glue delivery pipeline, wherein the glue delivery pipeline includes a glue manifold 34 and a glue delivery pipe 2, wherein the glue manifold 34 is arranged on the bracket 46 and extends along the length direction of the second frame 47; the liquid inlet of each nozzle 40 is connected to the glue manifold 34; the glue delivery pipe 2 is used to connect the glue manifold 34 and the storage tank 1, so as to realize the transitional delivery of glue between the glue storage tank 1 and the glue manifold 34.

[0041] See also Figure 1-Figure 13 The heat preservation device includes a first heating interlayer 4 arranged on the glue storage tank 1 for heating the glue in the glue storage tank 1, a second heating interlayer 5 for heating the glue in the glue delivery pipe, a hot water supply device and a hot water circulation delivery device for driving hot water to circulate in the first heating interlayer 4 and the second heating interlayer 5, wherein the first heating interlayer 4 is wrapped on the outer wall of the glue storage tank 1, and the second heating interlayer 5 is wrapped on the outer wall of the glue delivery pipe; the hot water supply device, the first heating interlayer 4, the second heating interlayer 5 and the hot water circulation delivery device constitute a closed loop.

[0042] See also Figure 1-Figure 13 The plywood glue spraying equipment of the present invention also includes a gas delivery device for supplying gas to each nozzle 40, and the gas delivery device includes a gas manifold 42 and a gas delivery mechanism 19 for driving the gas to move to the gas manifold 42; wherein the gas manifold 42 is arranged on the bracket 46 and extends along the length direction of the second frame 47; the air inlet of each nozzle 40 is connected to the gas manifold 42.

[0043] See also Figure 1-Figure 13 The glue storage tank 1 includes an outer tank body arranged on a first frame and an inner tank body arranged inside the outer tank body, and the gap between the outer tank body and the inner tank body constitutes the first heating interlayer 4; the glue delivery pipeline includes an inner pipeline and an outer pipeline, and the gap between the inner pipeline and the outer pipeline constitutes the second heating interlayer 5.

[0044] In addition to the above-mentioned embodiments, the first heating interlayer 4 and the second heating interlayer 5 and the glue storage tank 1 and the glue delivery pipeline can be a split structure, for example, an insulation box is arranged outside the glue storage tank 1. In addition, in this embodiment, the glue delivery pipeline for delivering glue (such as the glue recovery pipe 49 and the glue manifold 34) can be designed as an inner and outer double-layer or multi-layer pipeline structure, which can ensure that the glue is delivered under constant temperature conditions, greatly ensuring the fluidity and viscosity of the glue.

[0045] See also Figure 1-Figure 13The hot water circulation and delivery device includes a hot water delivery pump 6 and a hot water delivery pipeline 7, wherein the hot water delivery pump 6, the first heating interlayer 4, the second heating interlayer 5, and the hot water supply device are connected through the hot water delivery pipeline 7 to form the closed loop. Since the hot water delivery pump 6, the first heating interlayer 4, the second heating interlayer 5, and the hot water supply device form a closed loop, the hot water delivery pump 6 circulates the hot water in the hot water supply device on the closed loop, thereby ensuring that the temperature of the hot water on the closed loop remains consistent and reaches a predetermined temperature range. And since the hot water supply device includes a water supply device and a heating device 33 for heating water arranged at the lower end of the outer tank body, the heating device 33 is a heater; the hot water entering the first heating interlayer 4 is heated by the heating device 33 to reach a predetermined temperature, so that not only the hot water in the first heating interlayer 4, the second heating interlayer 5 and the hot water delivery pipeline 7 can be recycled, but also the hot water in the first heating interlayer 4, the second heating interlayer 5 and the hot water delivery pipeline 7 can reach a predetermined temperature range, so that the glue located in the glue storage tank 1 and the glue delivery pipeline is at the most suitable temperature, so that it has better properties, such as fluidity and adhesion; in this way, it is not only conducive to the transportation of glue and the glue spraying device spraying glue on the slab, but also conducive to the composite of plywood; for this reason, a water level sensor 8 and a temperature sensor 9 are arranged at the lower end of the outer tank body, which are used to monitor the water level and temperature in the first heating interlayer 4 in real time.

[0046] See also Figure 1-Figure 13 The lower end of the glue storage tank 1 in this embodiment is provided with a hot water discharge port 10 for discharging the hot water of the first heating interlayer 4 and a glue discharge port 11 for discharging the glue in the glue storage tank 1, wherein the hot water discharge port 10 and the glue discharge port 11 are provided with a connecting valve for controlling the opening or closing thereof, wherein when the plywood glue spraying device of the present invention is working, the hot water discharge port 10 is used to communicate with the hot water delivery pipe 7 or the hot water delivery pump 6; the glue discharge port 11 is used to communicate with the glue delivery pipe or the glue delivery pump 24; when the plywood glue spraying device of the present invention stops working, the connecting valves in the hot water discharge port 10 and the glue discharge port 11 can be opened manually or electrically to empty the hot water in the first heating interlayer 4 and the glue in the inner tank body. In addition, when cleaning the glue storage tank 1, the cleaning liquid in the first heating interlayer 4 and the inner tank body can also be discharged by opening the connecting valves in the hot water discharge port 10 and the glue discharge port 11. Therefore, the communication valve may be a three-way ball valve 26 or an electric three-way ball valve 35 .

[0047] See also Figure 1-Figure 13The first frame is provided with a stirring device 12 for stirring the glue, the stirring device 12 includes a stirring rod and a stirring motor for driving the stirring rod for stirring, wherein the stirring rod extends downward into the inner tank body. By providing the stirring device 12, the glue in the glue storage tank 1 can be stirred so that it is heated evenly, thereby maintaining good fluidity and facilitating transportation.

[0048] In addition, the glue storage tank 1 of the present embodiment is provided with a feeding port connected to the inner tank body at the upper end, and the feeding port is multiple and is used to replenish glue to the glue storage tank 1; the glue storage tank 1 is also provided with a drying tank 13 at the upper end, which is used to dry the air entering the first heating interlayer 4 or the inner tank body, and the glue storage tank 1 is provided with a drying tank installation position at the upper end, and a breathing valve 14 is installed on the drying tank 13, and the drying tank 13 is connected to the breathing valve 14; in addition, the glue storage tank 1 is also provided with a cleaning port at the upper end, which is used to communicate with a cleaning device or a cleaning pipeline, and the inner wall of the inner tank body or the outer tank body is cleaned by the cleaning liquid in the cleaning device or the cleaning pipeline.

[0049] See also Figure 1-Figure 13 The plywood glue spraying device of the present invention further includes a recycling system D for recycling glue, wherein the recycling system D includes a glue recycling box 16, a glue recycling tank 48 for recycling glue arranged below the glue spraying device, and a glue recycling pipe 49 connected to the glue recycling tank 48, wherein the glue recycling tank 48 is installed on the second frame 47 through a detachable connection structure, and the cross-sectional area of ​​the bottom of the glue recycling tank 48 gradually decreases downward, forming a guide portion for guiding the glue to enter the glue recycling pipe 49, and filtering impurities in the recycled glue. At the same time, in order to facilitate the cleaning of the side walls of the frame and the glue recycling tank 48, polytetrafluoroethylene can be sprayed or polytetrafluoroethylene patches can be attached to the side walls of the second frame 47 and the glue recycling tank 48.

[0050] See also Figure 1-Figure 13 The inlet end of the glue recovery pipe 49 is connected to the bottom of the glue recovery tank 48, and the outlet end is connected to the inlet end of the glue recovery box 16 through a glue delivery pipeline. The outlet end of the glue recovery box 16 is connected to one of the feed ports of the glue storage tank 1 through a glue delivery pipeline; the outlet end of the glue recovery pipe 49 is provided with a glue recovery control valve (for example, a straight-through ball valve) for opening or closing the outlet end of the glue recovery pipe 49; the bottom of the glue recovery tank 48 is provided with a filter screen 50 between the inlet end of the glue recovery pipe 49 and the bottom of the glue recovery tank 48, which is used to filter impurities in the recovered glue. Through the above structure, the excess glue flows to the bottom of the glue recovery tank 48, and flows into the glue recovery box 16 through the glue recovery pipe 49, thereby realizing the recycling and reuse of the glue.

[0051] See also Figure 1-Figure 13 The glue recovery box 16 is provided with a diaphragm pump 17 for delivering the glue in the glue recovery box 16 into the glue storage tank 1, wherein a filter 18 is provided between the liquid inlet end of the diaphragm pump 17 and the outlet end of the glue recovery box 16; the gas inlet end of the diaphragm pump 17 is connected with the gas delivery mechanism 19 through a gas delivery pipeline, wherein a pressure reducing valve 20 and a solenoid valve 21 are provided between the gas inlet end of the diaphragm pump 17 and the gas delivery mechanism 19, wherein the pressure reducing valve 20 is used to control the flow rate of the gas, and the solenoid valve 21 is used to control the opening and closing of the gas delivery pipeline; in addition, a liquid level alarm is provided in the glue recovery box 16 for monitoring and alarming the liquid level of the glue in the box.

[0052] The gas delivery device and the gas delivery mechanism 19 in this embodiment can share a set of gas supply equipment, and can be driven separately through gas delivery pipelines and various types of control valves, thereby saving costs.

[0053] See also Figure 1-Figure 13 The control module in the glue spraying system C of the present invention includes a liquid pressure reducing valve 45 disposed between the glue manifold 34 and each nozzle 40 and a gas pressure reducing valve 41 disposed between the gas manifold 42 and each nozzle 40, wherein the liquid pressure reducing valve 45 is used to control the flow rate of the glue entering each nozzle 40 to be consistent; and the gas pressure reducing valve 41 is used to control the flow rate of the gas entering each nozzle 40 to be consistent. Through the above arrangement, the flow rates of the glue entering the nozzle 40 and the air flow are kept consistent, so that the flow rate of the glue sprayed from each nozzle 40 is kept consistent.

[0054] In addition, the glue spraying system C in the present invention is provided with a solenoid valve 21 between the liquid pressure reducing valve 45 and the nozzle 40, which is used to control the connection and disconnection of the pipeline between the liquid pressure reducing valve 45 and the nozzle 40; and a solenoid valve 21 is provided between the gas pressure reducing valve 41 and the nozzle 40, which is used to control the connection and disconnection of the pipeline between the gas pressure reducing valve 41 and the nozzle 40.

[0055] See also Figure 1-Figure 13The glue spraying system C of the present invention also includes a vertical adjustment device 51 for adjusting the height of the glue spraying device, wherein the vertical adjustment device 51 includes a worm screw lifter arranged on the second frame 47 and a vertical drive mechanism for driving the worm screw lifter to work, wherein the worm screw lifter includes a screw transmission mechanism and a worm gear mechanism for driving the screw nut in the screw transmission mechanism to rotate; the vertical drive mechanism is driven by a motor or manually. The worm in the worm gear mechanism is driven by a motor or manually, thereby driving the worm and the screw nut in the screw transmission mechanism to rotate, and then driving the screw in the screw transmission mechanism and the bracket 46 connected to the screw to move vertically, thereby adjusting the height of the glue spraying device installed on the bracket 46.

[0056] In this embodiment, the vertical drive mechanism is driven manually, that is, the worm in the worm gear mechanism is driven to rotate by adjusting the rotating wheel, thereby driving the glue spraying device on the bracket 46 to move vertically. In order to facilitate adjustment, a spray height gauge is also provided on the second frame 47 for the operator to use as a reference for adjusting the height of the glue spraying device.

[0057] The glue delivery mechanism of this embodiment is a glue delivery pump 24, for example a gear pump; the inlet end of the glue delivery pump 24 is connected to the glue storage tank 1 through a glue delivery pipe 2, and the outlet end is connected to the inlet end of the glue delivery pipe 2, and the outlet end of the glue delivery pipe 2 is connected to the inlet end of the glue manifold 34.

[0058] See also Figure 1-Figure 13 The plywood glue spraying device of the present invention further comprises a cleaning device, wherein the cleaning device comprises a first cleaning mechanism for cleaning the nozzle 40 and a second cleaning mechanism for cleaning the glue delivery pump 24, the glue delivery pipe 2, the glue manifold 34 and the nozzle 40. When the glue spraying device is on standby, the first cleaning mechanism cleans each nozzle 40; when the glue spraying device is stopped, the second cleaning mechanism cleans the glue delivery pump 24, the glue delivery pipe 2, the glue manifold 34 and each nozzle 40.

[0059] The first cleaning mechanism includes a cleaning liquid manifold 44 and a cleaning liquid conveying mechanism for driving the cleaning liquid to move to the cleaning liquid manifold 44, wherein the cleaning liquid manifold 44 is mounted on the bracket 46 and extends along the length direction of the second frame 47; the inlet end of the cleaning liquid manifold 44 is provided with a cleaning liquid control valve (for example, a straight ball valve) for controlling its opening or closing; the cleaning liquid control valve is a straight ball valve 39; the cleaning liquid manifold 44 is connected to the liquid inlet of each nozzle 40. Through the above arrangement, when the glue spraying system C of the present invention is temporarily stopped (standby), the cleaning liquid control valve is opened, and the nozzle 40 can be cleaned when the glue spraying system C of the present invention is temporarily stopped. In addition, the inlet end of the cleaning liquid manifold 44 is provided with a filter 18 for filtering the cleaning liquid.

[0060] See also Figure 1-Figure 13 The glue spraying module further includes a manual three-way ball valve 26 disposed between the nozzle 40 and the glue manifold 34 and the cleaning liquid manifold 44, wherein the lower end of the manual three-way ball valve 26 is communicated with the liquid inlet of the nozzle 40, one of the other two ends of the manual three-way ball valve 26 is connected to the glue manifold 34, and the other end is communicated with the cleaning liquid manifold 44. Through the above arrangement, when it is necessary to clean the nozzle 40, the liquid inlet of the nozzle 40 is communicated with the cleaning liquid manifold 44 through the manual three-way ball valve 26, so that the cleaning liquid enters the nozzle 40, and the nozzle 40 is cleaned.

[0061] See also Figure 1-Figure 13 , the cleaning liquid delivery mechanism includes a cleaning liquid delivery pump and a cleaning liquid delivery pipeline 52, wherein the inlet end of the cleaning liquid delivery pump is connected to the cleaning liquid storage tank 3, and the outlet end is connected to the inlet end of the cleaning liquid delivery pipeline 52, and the outlet end of the cleaning liquid delivery pipeline 52 is connected to the inlet end of the cleaning liquid manifold 44. The cleaning liquid in the cleaning liquid storage tank 3 is delivered to the position to be cleaned by the cleaning liquid delivery pump to achieve cleaning. In addition, the cleaning liquid delivery pump in this embodiment is driven by air pressure, that is, the gas inlet of the cleaning liquid storage tank 3 is connected to the gas delivery mechanism 19, and the high-pressure gas is delivered to the cleaning liquid storage tank 3 through the gas delivery mechanism 19, so that the cleaning liquid in the cleaning liquid storage tank 3 flows out from the discharge port of the cleaning liquid storage tank 3, and enters the cleaning liquid manifold 44 through the cleaning liquid delivery pipeline 52, so as to achieve cleaning of the nozzle 40. A gas pressure reducing valve 41 and a pressure regulating valve 43 are also arranged between the cleaning liquid storage tank 3 and the gas delivery mechanism 19, and the pressure regulating valve 43 has a water-gas separator and a stop valve. Since the cleaning liquid delivery pump is the gas delivery mechanism 19 in the gas delivery device, this can save costs.

[0062] See also Figure 1-Figure 13, the second cleaning mechanism includes an electric three-way valve 35 disposed between the glue storage tank 1 and the glue delivery pump 24, wherein one end of the electric three-way valve 35 is connected to the outlet end of the glue storage tank 1, one of the other two ends is connected to the outlet end of the barreled cleaning liquid, and the other end is connected to the inlet end of the glue delivery pump 24. Through the above arrangement, when the glue spraying system C of the present invention is shut down for a long time, the barreled cleaning liquid is connected to the glue delivery pump 24 by controlling the electric three-way ball valve 35, and the cleaning liquid is delivered to the glue delivery pipe 2, the glue manifold 34 and each nozzle 40 through the glue delivery pump 24, so as to clean the glue delivery pump 24, the glue delivery pipe 2, the glue manifold 34 and each nozzle 40, thereby preventing the glue from solidifying and clogging the pipeline.

[0063] In addition to the above method, after the plywood glue spraying equipment of the present invention is shut down, the cleaning liquid delivery pipeline 52 can also be manually connected to the corresponding devices or pipelines in the glue storage system A, glue delivery system B, glue spraying system C and recovery system D to clean them.

[0064] See also Figure 1-Figure 13 The glue spraying system C further includes a detection device, which detects whether the slab of the plywood reaches the bottom of the glue spraying device; the detection device is a single group or multiple groups, and each group of detection devices is a contact sensor (such as a pressure sensor) or a non-contact sensor (photoelectric sensor). Through the above detection device, it is judged whether the slab reaches the glue coating station. In addition, a plurality of air exhaust ports 53 are provided on the second frame 47.

[0065] See also Figure 1-Figure 13 In this embodiment, a diaphragm type pulsation damper 36 and a mass flow meter 25 are provided at the glue delivery pipe 2 between the glue delivery pump 24 and the glue manifold 34; in addition to the above description, a pressure sensor 38, a hose 31 and a basket filter 22 for detecting pressure are also provided in the glue delivery pipe 2 in the glue delivery system B of the present invention. Among them, a check valve 29 and a three-way ball valve are also connected between the mass flow meter 25 and the glue delivery pump 24, wherein one end of the three-way ball valve is connected to the mass flow meter 25, one of the other two ends is connected to the check valve 29, and the other end is used as a discharge port; the other end of the check valve 29 is connected to the outlet end of the glue delivery pump 24; when the three-way ball valve is adjusted to full pass, the glue in the main pipeline (i.e., the glue delivery pipe 2) can be discharged.

[0066] In addition, the glue delivery system B of the present invention is also provided with a return pipe 37 for conveying the glue in the glue delivery pipe back to the glue storage tank 1. The starting point of the return pipe 37 is located between the check valve 29 and the three-way ball valve, and the end point is located at the feed port of the glue storage tank 1. From the starting point to the end point, an electric straight-through ball valve 28, a back pressure valve 27 (for adjusting the pressure in the pipeline) and a three-way ball valve 26 (when fully open, the glue in the return pipe 37 is discharged) are sequentially arranged.

[0067] See also Figure 1-Figure 13 The working principle of the plywood glue spraying equipment of the present invention is:

[0068] The plywood glue spraying device of the present invention is arranged between the conveying devices of the plywood slabs. When the plywood slabs move to the glue spraying station, that is, when they are located below the glue spraying device, the control system controls the plywood glue spraying device of the present invention to work, so as to spray glue on the slabs, which specifically includes two working processes of glue feeding and glue spraying, wherein:

[0069] The glue feeding process is as follows:

[0070] During operation, the preheated glue is added to the glue storage tank 1, and the glue conveying mechanism conveys the glue in the glue storage tank 1 to the glue conveying pipeline. The glue in the glue conveying pipeline enters the glue spraying device along the glue conveying pipeline, and the glue spraying device sprays the glue on the plywood blank, thereby completing the glue delivery work. At the same time, the hot water supply device adds hot water to the first heating interlayer 4 and the second heating interlayer 5, and the hot water circulation conveying device drives the hot water to circulate in the first heating interlayer 4 and the second heating interlayer 5. Since the first heating interlayer 4 is wrapped around the outer wall of the glue storage tank 1, and the second heating interlayer 5 is wrapped around the outer wall of the glue delivery pipe, the hot water in the first heating interlayer 4 can heat the glue in the glue storage tank 1 and keep it within a predetermined temperature range (the predetermined temperature range refers to the temperature range with the best fluidity and viscosity of the glue), and the second heating interlayer 5 heats the glue in the glue delivery pipe and keeps it within a predetermined temperature range, or keeps the temperature of the glue in the glue storage tank 1 consistent with the temperature of the glue in the glue delivery pipe, thereby ensuring that the glue is transported under constant temperature conditions and that the glue has good fluidity and viscosity, which can prevent the glue from solidifying and ensure the spraying effect, and can also ensure that the slabs sprayed with glue can be bonded more tightly.

[0071] The glue spraying process is as follows:

[0072] When the glue delivery mechanism delivers glue to the glue manifold 34 through the glue delivery pipe, the gas delivery mechanism 19 delivers gas to the gas manifold 42, and the gas entering the gas manifold 42 moves to the nozzles 40 of each glue spraying module, while the glue entering the glue manifold 34 moves to each nozzle 40, in which the glue and the gas are fully mixed and then sprayed out through the nozzle opening of the nozzle 40, thereby evenly spraying the glue on the plywood blank.

[0073] In the above-mentioned glue spraying process, since there are multiple groups of glue spraying modules, and multiple groups of glue spraying modules are evenly arranged along the length direction of the frame, nozzles 40 are arranged above each position of the slab, and the spraying range of these nozzles 40 covers all positions on the slab; when spraying glue, all nozzles 40 spray glue to the upper surface of the slab at the same time, so that the glue is sprayed on various positions of the slab. Compared with the roller-type coating method, the glue spraying system C of the present invention has a faster spraying speed and higher efficiency. In addition, since multiple glue spraying modules spray glue onto the slab at the same time, the curing degree of the glue at various positions of the slab is the same, thereby ensuring the bonding effect of the glue. In addition, since the glue spraying system C of the present invention mixes the gas and glue in the nozzle 40 before spraying, the volume of the glue particles sprayed is smaller and the spraying is more uniform.

[0074] After the glue spraying is completed, the conveying device conveys the slab sprayed with glue to the next processing station, and then conveys the slab to be sprayed to the spraying station. The plywood glue spraying equipment of the present invention repeats the glue feeding-glue spraying work.

[0075] The above is a preferred embodiment of the present invention, but the embodiment of the present invention is not limited to the above content. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A plywood glue spraying device, comprising a glue storage system, a glue spraying system and a glue delivery system for delivering glue in the glue storage system to the glue spraying system, characterized in that: The glue storage system comprises a first frame and a glue storage tank arranged on the first frame; The glue spraying system comprises a second frame and a glue spraying device arranged on the second frame, wherein the glue spraying device comprises a bracket arranged on the second frame, a glue spraying module arranged on the bracket, and a control module for controlling the flow rate of glue sprayed by multiple glue spraying modules to be consistent, wherein the glue spraying modules are multiple groups, and the multiple groups of glue spraying modules are evenly arranged on the bracket along the extension direction of the second frame; each group of glue spraying modules comprises a nozzle; The glue delivery system includes a glue delivery device for delivering glue in the glue storage tank to the glue spraying device and a heat preservation device for ensuring constant temperature delivery of the glue, wherein: The glue delivery device comprises a glue delivery pipeline and a glue delivery mechanism for driving the glue to move in the glue delivery pipeline, wherein the glue delivery pipeline comprises a glue manifold and a glue delivery pipe, wherein the glue manifold is arranged on the bracket and extends along the length direction of the second frame; the liquid inlet of each nozzle is connected to the glue manifold; the glue delivery pipe is used to connect the glue manifold and the glue storage tank to realize the transitional delivery of glue between the glue storage tank and the glue manifold; The heat preservation device comprises a first heating interlayer arranged on the glue storage tank for heating the glue in the glue storage tank, a second heating interlayer for heating the glue in the glue delivery pipe, a hot water supply device and a hot water circulation delivery device for driving hot water to circulate in the first heating interlayer and the second heating interlayer, wherein the first heating interlayer is wrapped on the outer wall of the glue storage tank, and the second heating interlayer is wrapped on the outer wall of the glue delivery pipe; the hot water supply device, the first heating interlayer, the second heating interlayer and the hot water circulation delivery device form a closed loop; Also included is a gas delivery device for supplying gas to each nozzle, the gas delivery device includes a gas manifold and a gas delivery mechanism for driving the gas to move to the gas manifold; wherein the gas manifold is arranged on the bracket and extends along the length direction of the second frame; the gas inlet of each nozzle is connected to the gas manifold; The glue storage tank comprises an outer tank body arranged on a first frame and an inner tank body arranged inside the outer tank body, wherein the gap between the outer tank body and the inner tank body constitutes the first heating interlayer; the glue delivery pipeline comprises an inner pipeline and an outer pipeline, and the gap between the inner pipeline and the outer pipeline constitutes the second heating interlayer; The hot water circulation delivery device comprises a hot water delivery pump and a hot water delivery pipeline, wherein the hot water delivery pump, the first heating interlayer, the second heating interlayer, and the hot water supply device are connected through the hot water delivery pipeline; The first frame is provided with a stirring device for stirring the glue, the stirring device comprising a stirring rod and a stirring motor for driving the stirring rod for stirring, wherein the stirring rod extends downward into the inner tank body; The control module includes a liquid pressure reducing valve arranged between the glue manifold and each nozzle and a gas pressure reducing valve arranged between the gas manifold and each nozzle, wherein the liquid pressure reducing valve is used to control the flow rate of the glue entering each nozzle to be consistent; the gas pressure reducing valve is used to control the flow rate of the gas entering each nozzle to be consistent; It also includes a recycling system for recycling glue, wherein the recycling system includes a glue recycling box, a glue recycling tank for recycling glue arranged below the glue spraying device, and a glue recycling pipe connected to the glue recycling tank, wherein the glue recycling tank is installed on the second frame through a detachable connection structure, and the cross-sectional area of ​​the bottom of the glue recycling tank gradually decreases downward to form a guide part for guiding the glue to enter the glue recycling pipe; the inlet end of the glue recycling pipe is connected to the bottom of the glue recycling tank, and the outlet end is connected to the inlet end of the glue recycling box, and the outlet end of the glue recycling box is connected to the feed port of the glue storage tank; the outlet end of the glue recycling pipe is provided with a glue recovery control valve for opening or closing the outlet end of the glue recycling pipe; the bottom of the glue recycling tank is provided with a filter between the inlet end of the glue recycling pipe and the bottom of the glue recycling tank for filtering impurities in the recovered glue.

2. The plywood glue spraying equipment according to claim 1, characterized in that: The glue spraying system also includes a vertical adjustment device for adjusting the height of the glue spraying device, wherein the vertical adjustment device includes a worm screw lift arranged on a frame and a vertical drive mechanism for driving the worm screw lift to work, wherein the worm screw lift includes a screw transmission mechanism and a worm gear mechanism for driving the screw nut in the screw transmission mechanism to rotate; the vertical drive mechanism is driven by a motor or manually.

3. The plywood glue spraying equipment according to claim 1, characterized in that: The glue recovery box is provided with a diaphragm pump for delivering the glue in the glue recovery box into the glue storage tank, wherein a filter is provided between the liquid inlet end of the diaphragm pump and the outlet end of the glue recovery box; the gas inlet end of the diaphragm pump is connected to the air supply device through a gas delivery pipeline, wherein a pressure reducing valve and a solenoid valve are provided between the gas inlet end of the diaphragm pump and the air supply device, wherein the pressure reducing valve is used to control the flow rate of the gas, and the solenoid valve is used to control the opening and closing of the gas delivery pipeline.

4. The plywood glue spraying equipment according to claim 1, characterized in that: The glue spraying system also includes a cleaning device, wherein the cleaning device includes a first cleaning mechanism for cleaning the nozzle and a second cleaning mechanism for cleaning the glue delivery mechanism and the nozzle. When the glue spraying device is on standby, the first cleaning mechanism cleans each nozzle; when the glue spraying device is stopped, the second cleaning mechanism cleans the glue delivery mechanism and each nozzle.

5. The plywood glue spraying equipment according to claim 4, characterized in that: The first cleaning mechanism comprises a cleaning liquid manifold and a cleaning liquid conveying mechanism for driving the cleaning liquid to move to the cleaning liquid manifold, wherein the cleaning liquid manifold is mounted on the bracket and extends along the length direction of the second frame; a cleaning liquid control valve for controlling the opening or closing of the cleaning liquid manifold is provided at the inlet end of the cleaning liquid manifold; the cleaning liquid manifold is communicated with the liquid inlet of each nozzle; the glue spraying module further comprises a manual three-way ball valve arranged between the nozzle and the glue manifold and the cleaning liquid manifold, wherein the lower end of the manual three-way ball valve is communicated with the liquid inlet of the nozzle, one of the other two ends of the manual three-way ball valve is communicated with the glue manifold, and the other end is communicated with the cleaning liquid manifold; The second cleaning mechanism includes a three-way reversing valve arranged between the glue storage tank and the glue conveying mechanism, wherein one end of the three-way reversing valve is connected to the outlet end of the glue storage tank, one of the other two ends is connected to the barreled cleaning liquid, and the other end is connected to the inlet end of the glue conveying mechanism.

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