CN115179373A - Preparation method of polyurethane plywood - Google Patents
Preparation method of polyurethane plywood Download PDFInfo
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- CN115179373A CN115179373A CN202210712174.5A CN202210712174A CN115179373A CN 115179373 A CN115179373 A CN 115179373A CN 202210712174 A CN202210712174 A CN 202210712174A CN 115179373 A CN115179373 A CN 115179373A
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- polyurethane foam
- foam board
- plywood
- polyurethane
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27D—WORKING VENEER OR PLYWOOD
- B27D1/00—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27D—WORKING VENEER OR PLYWOOD
- B27D3/00—Veneer presses; Press plates; Plywood presses
- B27D3/02—Veneer presses; Press plates; Plywood presses with a plurality of press plates, i.e. multi- platen hot presses
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27G—ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
- B27G11/00—Applying adhesives or glue to surfaces of wood to be joined
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K5/00—Treating of wood not provided for in groups B27K1/00, B27K3/00
- B27K5/04—Combined bleaching or impregnating and drying of wood
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K2240/00—Purpose of the treatment
- B27K2240/20—Removing fungi, molds or insects
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Mechanical Engineering (AREA)
- Veneer Processing And Manufacture Of Plywood (AREA)
Abstract
The invention provides a preparation method of a polyurethane plywood, belongs to the technical field of plywood preparation, and solves the technical problems of lack of linkage among existing processing equipment, low processing efficiency, low adhesion of the plywood and the like. The preparation method of the polyurethane plywood comprises the steps of performing frosting treatment on the side edges and the surfaces of the polyurethane foam board and the wood veneer, and removing impurities to obtain the smooth and clean polyurethane foam board and the wood veneer; soaking the treated polyurethane foam board and the wood veneer into the insect-proof liquid at the temperature of 30-45 ℃ for the following time: 100-150min; drying the soaked polyurethane foam board and wood veneer at the drying temperature of 120-150 ℃ until the water content reaches 15-20%; and (4) putting the dried polyurethane foam board and the dried wood veneer into clear water for washing. The invention has the advantages of improving the continuity of preparation, reducing the cost, improving the adhesive force of the plywood and improving the quality of the plywood.
Description
Technical Field
The invention belongs to the technical field of plywood preparation, relates to plywood, and particularly relates to a preparation method of polyurethane plywood.
Background
Along with the development of society and the gradual improvement of the living standard of people, people pay more and more attention to the quality and grade of house decoration, so wood floors are selected more and more, but as the forest resources in the world are gradually reduced and wood raw materials are deficient, wood floors completely cut by wood boards are less and less, people gradually turn to plywood in the light of eyes, and the wood boards are formed by gluing crushed aggregates.
Through search, for example, chinese patent literature discloses a method for preparing multilayer plywood [ application number: 201911151215.2; publication No.: CN 110861170B. The plywood is prepared by cutting wood into wood chips, wood particles or wood shavings, drying, soaking the wood chips, wood particles or wood shavings in insect-proof solution for a period of time, taking out the wood chips, naturally drying the wood chips, soaking the wood chips in the insect-proof solution again, taking out the wood chips and drying the wood chips to obtain a plywood raw material; firstly, paving plywood raw materials flatly, spraying an adhesive, paving a layer of sound insulation material, spraying the adhesive on the surface, paving a layer of plywood raw materials, and pressurizing to prepare a first-level plywood; cutting a plurality of arc-shaped grooves on two side surfaces of the first-level plywood by using metal wires, spraying adhesives on the upper side and the lower side of the first-level plywood, paving plywood raw materials, and pressurizing to synthesize a second-level plywood; and repeating the steps for a plurality of times to form the multistage plywood, airing, spraying mildew-proof liquid on the synthesized multistage plywood, and drying to obtain a finished plywood product. The preparation method of the plywood is simple to operate, and the prepared plywood has no aldehyde, good safety and is convenient to widely popularize.
Although the plywood that discloses in this patent agent feature of environmental protection is good, however, this plywood is when preparing, and every step all adopts solitary equipment, lacks linkage nature between the equipment, not only influences the efficiency of processing, reduces plywood finished product quality, and equipment cost is higher moreover to when rubber coating pressfitting operation, need carry out multiple operation, the rubber coating that leads to the first layer can carry out the pressfitting many times, can lead to the fact the influence to the adhesive force of plywood.
Disclosure of Invention
The invention aims to provide a preparation method of a polyurethane plywood aiming at the problems in the prior art, and the technical problems to be solved are as follows: how to realize the continuity of improving preparation, reduce cost to improve the adhesive force of plywood, improve the quality of plywood.
The purpose of the invention can be realized by the following technical scheme:
a preparation method of a polyurethane plywood comprises the following steps:
s1, cutting a polyurethane foam board and a wood veneer into preset sizes, performing sanding treatment on the side edges and the surfaces of the polyurethane foam board and the wood veneer, and removing impurities to obtain a smooth and clean polyurethane foam board and a smooth and clean wood veneer;
s2, soaking the treated polyurethane foam board and the wood veneer into insect-proof liquid at the soaking temperature of 30-45 ℃ for the following time: 100-150min;
s3, drying the soaked polyurethane foam board and the soaked wood veneer at the drying temperature of 120-150 ℃ until the water content reaches 15-20%;
s4, placing the dried polyurethane foam board and the dried wood veneer into clear water for washing, washing the surfaces of the polyurethane foam board and the wood veneer clean, and drying again at the drying temperature of 140-180 ℃ until the water content of the polyurethane foam board and the wood veneer reaches 5-9%;
s5, transferring the dried polyurethane foam board and the dried wood single board into a gluing mechanism by using a first conveying mechanism, simultaneously coating polyurethane adhesive on the wood single board and the dried wood single board by using the gluing mechanism, and trowelling the polyurethane adhesive by using a trowelling assembly during gluing;
s6, after the smearing is completed, the polyurethane foam board and the wood single board are transferred to a hot pressing mechanism through the first conveying mechanism, the polyurethane foam board and the wood single board are stacked on a lower hot pressing board of the hot pressing mechanism through the second conveying mechanism, and then the polyurethane foam board is pressed between the two wood single boards through the cooperation of the upper hot pressing board and the lower hot pressing board, so that the polyurethane plywood is obtained.
Preferably, the sizing amount of the wood veneer and the polyurethane foam board in S5 is 330-380g/m2.
Preferably, the temperature of the hot pressing in the S6 is 110-120 ℃, and the pressing time is 40-60min.
Preferably, after the pressurization is finished, the pressure is maintained for 20-30min, and then the pressure is released, wherein the hot pressing pressure required by the pressure maintaining is 1.4-1.8MPa.
Preferably, the equipment adopted in the steps S2-S6 is plywood processing equipment, the plywood processing equipment comprises a base, a soaking box is fixed at the left end of the base, a support frame is fixed at the right end of the base, a first conveying mechanism is arranged between the soaking box and the support frame, the first conveying mechanism comprises a support column fixedly connected with the upper end of the soaking box, a threaded rod is rotatably connected between the support column and the support frame, a rotating motor is fixed on the support frame, an output shaft end of the rotating motor is fixedly connected with one end of the threaded rod, a moving seat is connected with the threaded rod through threads, a hydraulic rod is fixed on the moving seat, a clamping assembly is arranged at the other end of the hydraulic rod, a hot pressing plate is arranged on the clamping assembly, a first moving assembly is further arranged on the base, a gluing mechanism is arranged on the moving assembly, the gluing mechanism is located between the soaking box and the support frame, a hot pressing mechanism is arranged in the support frame, and a second conveying mechanism is arranged on the hot pressing.
By adopting the structure, when the polyurethane foam board and the wood veneer are in operation, the polyurethane foam board and the wood veneer which are well processed are clamped and fixed by the clamping mechanism, then the hydraulic rod is utilized to drive the clamping mechanism to descend, so that the polyurethane foam board and the wood veneer enter the inside of the soaking box and are soaked by the insect-proof liquid, the soaking temperature is 30-45 ℃, and the soaking time is as follows: 100-150min, after soaking, discharging insect-proof liquid, heating the interior of a soaking box to 120-150 ℃ by using an upper hot pressing plate, drying the polyurethane foam board and the wood veneer, after the water content of the polyurethane foam board and the wood veneer is driven to 15-20%, adding clear water into the soaking box, washing the polyurethane foam board and the wood veneer by using the clear water, after the surfaces are washed clean, heating the interior of the soaking box to 140-180 ℃ by using the upper hot pressing plate again, enabling the water content of the polyurethane foam board and the wood veneer to reach 5-9%, then driving a clamping component to ascend by using a hydraulic rod, enabling the polyurethane foam board and the wood veneer to move out of the soaking box, starting a rotating motor, driving a threaded rod to rotate by using the rotating motor, and enabling a moving seat to drive the polyurethane foam board and the wood veneer to move to a gluing mechanism, then the first moving component is opened, so that the gluing part of the gluing mechanism is respectively positioned at the upper sides of the wood single plate at the lowest layer and the polyurethane foam plate at the middle layer, polyurethane adhesive is simultaneously smeared on the polyurethane foam plate and the wood single plate, meanwhile, the smearing component is utilized to smear the polyurethane adhesive, after smearing is finished, the threaded rod is rotated to drive the moving seat to move, so that the polyurethane foam plate and the wood single plate are moved to the upper part of the hot pressing mechanism, the second conveying mechanism is utilized to clamp the front side and the rear side of the polyurethane foam plate and the wood single plate, at the moment, the clamping component is loosened, then the polyurethane foam plate and the wood single plate are stacked on the hot pressing mechanism by utilizing the second conveying mechanism, simultaneously, the hydraulic rod is utilized to drive the upper hot pressing plate to descend, and the polyurethane foam plate and the wood single plate are hot pressed by utilizing the cooperation of the upper hot pressing plate and the hot pressing mechanism, the polyurethane plywood is obtained, so that the continuity of plywood processing is improved, the flow production of the plywood is realized, the drying of the base material and the hot press molding of the plywood are realized by utilizing the upper hot press plate, the cost of equipment is reduced, the polyurethane foam plate and the wood veneer can be simultaneously subjected to gluing and hot pressing, the adhesive force between the plywood is ensured, and the processing quality of the plywood is improved.
Preferably, the clamping mechanism comprises a sealing plate, the sealing plate is fixedly connected with the telescopic end of the hydraulic rod, a second moving assembly is fixed to the other side of the sealing plate, two vertical plates are arranged on the second moving assembly, three clamping seats are fixed to opposite surfaces of the two vertical plates, clamping grooves are formed in the clamping seats, reserved spaces are formed between the clamping seats and the clamping grooves, and a hot pressing plate is arranged on the lower side of the second moving assembly.
Structure more than adopting, at the during operation, utilize the second to remove the subassembly and drive two riser reverse motion, from last down placing in proper order on the grip slipper that corresponds according to the order of timber veneer-polyurethane foam board-timber veneer, this kind of mode of placement, it is convenient to mutually support with rubber coating mechanism and hot pressing mechanism, then utilize the second to remove the subassembly and drive two risers relative motion, fix timber veneer and polyurethane foam board, after fixed the completion, the hydraulic stem drives the closing plate and descends, make timber veneer and polyurethane foam board enter into the soak the incasement, the setting of closing plate, realize the sealed of soaking the case.
Preferably, hot pressing mechanism includes the supporting seat, is fixed with down the hot pressboard on the supporting seat, and the cavity has been seted up to the inside of supporting seat, is fixed with driving motor on the supporting seat, and driving motor's output shaft end is fixed with the two-way threaded rod that stretches into in the cavity, and threaded connection has two movable plates on the two-way threaded rod, and the upper end of movable plate stretches out the cavity and is connected with second conveying mechanism, and lower hot pressboard is located between two movable plates.
Structure more than adopting, after the centre gripping subassembly moved the top of hot press mechanism, open driving motor, driving motor drives two-way threaded rod and rotates, thereby drive two movable plate opposite directions motions, make two movable plates centre gripping respectively in the front and back both sides of timber veneer and polyurethane foam board, then utilize second movable assembly to drive two riser reverse motions, make timber veneer and polyurethane foam board and centre gripping groove break away from, at this moment, utilize second conveying mechanism to drive timber veneer and polyurethane foam board decline, make timber veneer and polyurethane foam board pile up in proper order on hot pressboard down, then open the hydraulic stem, make the movable plate drive hot pressboard decline, utilize the cooperation of hot pressboard and last hot pressboard down, realize the hot pressing operation to the plywood, do not need the manual work to pile up, full automation, the efficiency of work is improved.
Preferably, the upper end of movable plate is fixed with two risers, and swivelling joint has two drive rollers between two risers, is fixed with the conveying motor on one of them riser, and the output shaft end and one of them drive roller fixed connection of conveying motor, two drive rollers pass through the conveyer belt transmission and connect, two be fixed with the backup pad between the riser, one side that the backup pad is close to hot pressboard down is fixed with a plurality of elastic component, and elastic component's the other end is fixed with the gusset plate, and the gusset plate is contradicted with the inboard of conveyer belt.
Structure more than adopting, when transporting timber veneer and polyurethane foam board, conveying motor drives the drive roller and rotates, the drive roller drives the conveyer belt rotation, thereby utilize the conveyer belt to drive timber veneer and polyurethane foam board decline, make timber veneer and polyurethane foam board pile up in proper order under on the hot pressboard, and the setting of elastic component and gusset plate, at the operation, can utilize the cooperation of elastic component and gusset plate, support the conveyer belt, thereby guarantee the stability of two conveyer belts to timber veneer and polyurethane foam board centre gripping, make timber veneer and polyurethane foam board can steadily fall, prevent timber veneer and polyurethane foam board skew, the processingquality of plywood is improved.
Preferably, the rubber coating mechanism includes the storage case, be fixed with the conveying pump on the storage case, the discharge end of conveying pump is fixed with first conveying pipeline, is fixed with two second conveying pipelines on the first conveying pipeline, and the other end of second conveying pipeline is fixed with the discharging pipe, and the downside of discharging pipe is fixed with a plurality of shower nozzles, and the one end and the storage case fixed connection of discharging pipe are fixed with two assemblies of floating, floating subassembly and discharging pipe one-to-one on the storage case.
Structure more than adopting, after the centre gripping subassembly moves on the rubber coating mechanism, first removal subassembly drives the storage case and moves forward, make two discharging pipes be located the top right-hand member of the timber veneer of below and middle polyurethane foam board respectively, then open the conveying pump, make simultaneously open rotating electrical machines and floating the subassembly, when the shower nozzle with polyurethane adhesive spraying timber veneer and polyurethane foam board on, make timber veneer and polyurethane foam board move to the right, realize the comprehensive spraying to timber veneer and polyurethane foam board, and utilize floating the subassembly to float the polyurethane adhesive on timber veneer and polyurethane foam board, make polyurethane adhesive distribute evenly, after the discharging pipe shifts out the right-hand member of timber veneer and polyurethane foam board, utilize first removal subassembly, make the discharging pipe move backward, break away from the centre gripping subassembly, the setting in headspace, can make the discharging pipe have sufficient spraying space, guarantee the comprehensiveness of spraying.
Preferably, floating the subassembly and include the fixing base, fixing base and storage case fixed connection, the spout has been seted up to the downside of fixing base, the inside of spout is fixed with the slide rail, sliding connection has the vibrations seat on the slide rail, the lower extreme of vibrations seat is fixed with the mounting panel, the downside of mounting panel is fixed with a plurality of vertical troweling boards, be fixed with horizontal troweling board between the adjacent vertical troweling board, the inside swivelling joint of spout has the rotation axis, be provided with floating motor in the fixing base, the output shaft end and the rotation axis fixed connection of floating motor, be fixed with the carousel on the rotation axis, annular wave groove has been seted up on the rotation disc, sliding connection has the sliding column in the annular wave groove, be fixed with the connecting seat on the vibrations seat, the connecting seat passes through connecting rod and sliding column fixed connection.
Structure more than adopting, when spreading out the polyurethane adhesive, open the floating motor, it is rotatory to drive the rotation axis, the rotation axis is rotatory to drive the rotary disk and rotate, thereby make the slip post slide in annular wave groove, utilize annular wave groove drive slip post to reciprocate to remove about, make the mounting panel drive vertical floating plate and horizontal floating plate and shake at a small circle at a high speed, thereby make vertical floating plate vertically float the polyurethane adhesive, utilize horizontal floating plate to carry out horizontal floating simultaneously, the floating is effectual, prevent that the polyurethane adhesive from scribbling inhomogeneous or have the adhesive force that the bubble influences the plywood, improve the processingquality of plywood, and horizontal floating plate can set up the mid portion at vertical floating plate, realize vertical floating earlier, at horizontal floating, at last at vertical floating, further improvement floating effect.
Compared with the prior art, the preparation method of the polyurethane plywood has the following advantages:
1. the preparation method of the polyurethane plywood is simple to operate, easy to implement, good in environmental protection performance and good in linkage effect among preparation devices, can realize flow processing of the plywood, improves processing efficiency, reduces processing cost, can simultaneously glue a polyurethane foam board and a wood veneer during gluing and hot pressing, and then simultaneously carries out hot press molding, so that the preparation steps are reduced, the plywood cannot be subjected to hot pressing for many times, and the adhesive force of the plywood can be improved.
2. By adopting the plywood processing equipment, the linkage operation of the device is realized, the equipment cost is reduced, the processing quality of the plywood is improved, the drying of the base material and the hot press molding of the plywood are realized by utilizing the upper hot press plate, the equipment cost is reduced, the polyurethane foam plate and the wood veneer can be simultaneously subjected to gluing and hot pressing, the adhesive force between the plywood is ensured, and the processing quality of the plywood is improved.
3. The setting of second transport mechanism, when transporting timber veneer and polyurethane foam board, the conveying motor drives the drive roller and rotates, the drive roller drives the conveyer belt rotation, thereby utilize the conveyer belt to drive timber veneer and polyurethane foam board decline, make timber veneer and polyurethane foam board pile up in proper order under on the hot pressboard, and the setting of elastic component and gusset plate, at the operation, can utilize the cooperation of elastic component and gusset plate, support the conveyer belt, thereby guarantee the stability of two conveyer belts to timber veneer and polyurethane foam board centre gripping, make timber veneer and polyurethane foam board can steadily fall, prevent timber veneer and polyurethane foam board skew, improve the processingquality of plywood.
4. Shakeout the structure setting of subassembly, when spreading out the polyurethane adhesive, open floating motor, it is rotatory to drive the rotation axis, the rotation axis is rotatory, it rotates to drive the rotary disk, thereby make the slip post slide in annular wave groove, utilize annular wave groove to drive the slip post and remove about reciprocating, make the mounting panel drive vertical troweling board and horizontal troweling board at the high-speed vibrations of minizone, thereby make vertical troweling board vertically float to the polyurethane adhesive, utilize horizontal troweling board to transversely float simultaneously, it is effectual to float, prevent that the polyurethane adhesive from smearing inhomogeneous or having the adhesive force that the bubble influences the plywood, improve the processingquality of plywood, and horizontal troweling board can set up the mid portion at vertical troweling board, realize vertical troweling earlier, at horizontal troweling, at last at vertical troweling, further floating effect of improvement.
Drawings
FIG. 1 is a process flow diagram of the present invention.
FIG. 2 is a table of tests in the present invention.
Figure 3 is a schematic view of the structure of the plywood processing apparatus of the present invention.
Fig. 4 is a schematic view of the structure of the clamping assembly of the present invention.
Fig. 5 is a schematic structural view of the hot press mechanism of the present invention.
Fig. 6 is a schematic structural view of a second conveyance mechanism in the present invention.
Fig. 7 is a schematic view of the structure of the glue applying mechanism of the present invention.
Fig. 8 is a schematic perspective view of the floating mechanism of the present invention.
Fig. 9 is a schematic view of the internal structure of the troweling mechanism of the present invention.
Fig. 10 is a partial enlarged view at a in fig. 9.
In the figure, 1, a base; 2. a soaking box; 3. a support post; 4. a support frame; 5. a threaded rod; 6. a rotating electric machine; 7. a movable seat; 8. a hydraulic lever; 9. a clamping mechanism; 10. a first moving assembly; 11. a gluing mechanism; 12. a sealing plate; 13. a second moving assembly; 14. a vertical plate; 15. a clamping seat; 16. a clamping groove; 17. mounting a hot pressing plate; 18. a supporting seat; 19. a drive motor; 20. a bidirectional threaded rod; 21. moving the plate; 22. a vertical plate; 23. a drive roller; 24. a conveying motor; 25. a conveyor belt; 26. a lower hot pressing plate; 27. a support plate; 28. an elastic member; 29. a reinforcing plate; 30. a material storage box; 31. a delivery pump; 32. a first feed delivery pipe; 33. a second delivery pipe; 34. a discharge pipe; 35. a spray head; 36. a fixed seat; 37. a vibration seat; 38. mounting a plate; 39. longitudinally troweling; 40. transversely troweling; 41. a chute; 42. a slide rail; 43. a rotating shaft; 44. rotating the disc; 45. an annular wave groove; 46. a sliding post; 47. a connecting seat; 48. a connecting rod.
Detailed Description
The following are specific embodiments of the present invention and are further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.
Example one
As shown in fig. 1, a preparation method of a polyurethane plywood comprises the following steps:
s1, cutting a polyurethane foam board and a wood veneer into preset sizes, performing sanding treatment on the side edges and the surfaces of the polyurethane foam board and the wood veneer, and removing impurities to obtain a smooth and clean polyurethane foam board and a smooth and clean wood veneer;
s2, soaking the treated polyurethane foam board and the wood veneer into insect-proof liquid at 38 ℃ for the following time: 125min;
s3, drying the soaked polyurethane foam board and wood veneer at the drying temperature of 135 ℃ until the water content reaches 17%;
s4, placing the dried polyurethane foam board and the dried wood veneer into clear water for washing, washing the surfaces of the polyurethane foam board and the wood veneer clean, and drying again at the drying temperature of 160 ℃ until the water content of the polyurethane foam board and the wood veneer reaches 7%;
s5, transferring the dried polyurethane foam board and the dried wood single board into a gluing mechanism by using a first conveying mechanism, simultaneously smearing polyurethane adhesive on the wood single board and the polyurethane foam board by using the gluing mechanism, and smearing the polyurethane adhesive by using a smearing component during gluing;
s6, after the smearing is completed, the polyurethane foam board and the wood single board are transferred to a hot pressing mechanism through the first conveying mechanism, the polyurethane foam board and the wood single board are stacked on a lower hot pressing board of the hot pressing mechanism through the second conveying mechanism, and then the polyurethane foam board is pressed between the two wood single boards through the cooperation of the upper hot pressing board and the lower hot pressing board, so that the polyurethane plywood is obtained.
Preferably, the sizing amount on the wood veneer and the polyurethane foam board in S5 are both 355g/m2.
Preferably, the temperature of the hot pressing in S6 is 115 ℃ and the pressing time is 50min.
Preferably, after the pressurization is finished, the pressure is maintained for 25min, and then the pressure is released, wherein the hot pressing pressure required by the pressure maintaining is 1.6MPa.
Example two
As shown in fig. 1, a method for preparing a polyurethane plywood comprises the following steps:
s1, cutting a polyurethane foam board and a wood veneer into preset sizes, performing sanding treatment on the side edges and the surfaces of the polyurethane foam board and the wood veneer, and removing impurities to obtain a smooth and clean polyurethane foam board and a smooth and clean wood veneer;
s2, soaking the treated polyurethane foam board and the wood veneer into insect-proof liquid at 38 ℃ for the following time: 125min;
s3, drying the soaked polyurethane foam board and the soaked wood veneer at the drying temperature of 135 ℃ until the water content reaches 17%;
s4, placing the dried polyurethane foam board and the dried wood veneer into clear water for washing, washing the surfaces of the polyurethane foam board and the wood veneer clean, and drying again at the drying temperature of 160 ℃ until the water content of the polyurethane foam board and the wood veneer reaches 7%;
s5, transferring the dried polyurethane foam board and the dried wood single board into a gluing mechanism by using a first conveying mechanism, simultaneously coating polyurethane adhesive on the wood single board and the dried wood single board by using the gluing mechanism, and trowelling the polyurethane adhesive by using a trowelling assembly during gluing;
s6, after the smearing is completed, the polyurethane foam board and the wood single board are transferred to a hot pressing mechanism through the first conveying mechanism, the polyurethane foam board and the wood single board are stacked on a lower hot pressing board of the hot pressing mechanism through the second conveying mechanism, and then the polyurethane foam board is pressed between the two wood single boards through the cooperation of the upper hot pressing board and the lower hot pressing board, so that the polyurethane plywood is obtained.
Preferably, the sizing amount on the wood veneer and the polyurethane foam board in S5 are both 355g/m2.
Preferably, the temperature of hot pressing in S6 is 115 ℃ and the pressing time is 50min.
Preferably, after the pressurization is finished, the pressure is maintained for 25min, and then the pressure is released, wherein the hot pressing pressure required by the pressure maintaining is 1.6MPa.
Preferably, as shown in fig. 3-10, the device used in steps S2-S6 is a plywood processing device, the plywood processing device includes a base 1, a soaking tank 2 is fixed to the left end of the base 1, a support frame 4 is fixed to the right end of the base 1, a first conveying mechanism is arranged between the soaking tank 2 and the support frame 4, the first conveying mechanism includes a pillar 3 fixedly connected to the upper end of the soaking tank 2, a threaded rod 5 is rotatably connected between the pillar 3 and the support frame 4, a rotating motor 6 is fixed to the support frame 4, an output shaft end of the rotating motor 6 is fixedly connected to one end of the threaded rod 5, a movable base 7 is connected to the threaded rod 5 through a thread, a hydraulic rod 8 is fixed to the movable base 7, a clamping assembly is arranged at the other end of the hydraulic rod 8, an upper hot pressing plate 17 is arranged on the clamping assembly, a first movable assembly 10 is further arranged on the base 1, a gluing mechanism 11 is arranged on the movable assembly, the gluing mechanism 11 is arranged between the soaking tank 2 and the support frame 4, a hot pressing mechanism is arranged in the support frame 4, and a second conveying mechanism is arranged on the hot pressing mechanism.
Structure more than adopting, at the during operation, the polyurethane foam board that will handle and timber veneer utilize fixture 9 to carry out the centre gripping fixed, then utilize hydraulic stem 8 to drive fixture 9 and descend for polyurethane foam board and timber veneer enter into the inside of steeping box 2, utilize protection against insects liquid to soak, and the soak temperature is 38 ℃, and the soak time is: 125min, after soaking, discharging the insect-proof liquid, heating the interior of the soaking box 2 to 135 ℃ by using an upper hot pressing plate 17, drying the polyurethane foam board and the wood veneer, adding clear water into the soaking box 2 after the water content of the polyurethane foam board and the wood veneer is driven to be 17%, washing the polyurethane foam board and the wood veneer by using the clear water, washing the surface of the polyurethane foam board and the wood veneer, heating the interior of the soaking box 2 to 160 ℃ by using the upper hot pressing plate 17 again to enable the water content of the polyurethane foam board and the wood veneer to reach 7%, then driving a clamping component to ascend by using a hydraulic rod 8 to enable the polyurethane foam board and the wood veneer to move out of the soaking box 2, starting a rotating motor 6, driving a threaded rod 5 to rotate by the rotating motor 6, and enabling a moving seat 7 to drive the polyurethane foam board and the wood veneer to move to a gluing mechanism 11, then, the first moving assembly 10 is opened, so that the gluing part of the gluing mechanism 11 is respectively positioned at the upper sides of the lowest layer of wood veneer and the middle layer of polyurethane foam board, polyurethane adhesive is simultaneously smeared on the polyurethane foam board and the wood veneer, meanwhile, the smearing assembly is used for smearing the polyurethane adhesive, after smearing is completed, the threaded rod 5 is used for rotating and driving the moving seat 7 to move, so that the polyurethane foam board and the wood veneer are moved above the hot-pressing mechanism, the second conveying mechanism is used for clamping the front side and the rear side of the polyurethane foam board and the wood veneer, at the moment, the clamping assembly is loosened, then the second conveying mechanism is used for stacking the polyurethane foam board and the wood veneer on the hot-pressing mechanism, meanwhile, the hydraulic rod 8 is used for driving the upper hot-pressing board 17 to descend, and the polyurethane foam board and the wood veneer are hot-pressed by the cooperation of the upper hot-pressing board 17 and the hot-pressing mechanism, obtain polyurethane plywood to improve the continuity of plywood processing, realized the flow production to the plywood, and utilize last hot pressboard 17 to realize the drying to the substrate and to the hot briquetting of plywood, reduced the cost of equipment, and can carry out rubber coating and hot pressing to polyurethane foam board and timber veneer simultaneously, guarantee the adhesive force between the plywood, improve the quality of plywood processing
Preferably, the clamping mechanism 9 includes a sealing plate 12, the sealing plate 12 is fixedly connected with the telescopic end of the hydraulic rod 8, a second moving assembly 13 is fixed on the other side of the sealing plate 12, two vertical plates 14 are arranged on the second moving assembly 13, three clamping seats 15 are fixed on the opposite surfaces of the two vertical plates 14, a clamping groove 16 is formed in the clamping seat 15, a reserved space is formed between the clamping seat 15 and the clamping groove 16, and an upper hot pressing plate 17 is arranged on the lower side of the second moving assembly 13.
Structure more than adopting, at the during operation, utilize second removal subassembly 13 to drive two riser 14 reverse motion, from last down placing in proper order on corresponding grip slipper 15 according to the order of timber veneer-polyurethane foam board-timber veneer, this kind of placing method, conveniently mutually support with rubber coating mechanism 11 and hot press mechanism, then utilize second removal subassembly 13 to drive two riser 14 relative motion, fix timber veneer and polyurethane foam board, after the fixed completion, hydraulic stem 8 drives closing plate 12 and descends, make timber veneer and polyurethane foam board enter into the steeping box 2, the setting of closing plate 12, realize the sealing to steeping box 2.
Preferably, the hot pressing mechanism comprises a supporting seat 18, a lower hot pressing plate 26 is fixed on the supporting seat 18, a cavity is formed in the supporting seat 18, a driving motor 19 is fixed on the supporting seat 18, a bidirectional threaded rod 20 extending into the cavity is fixed at an output shaft end of the driving motor 19, two moving plates 21 are connected to the bidirectional threaded rod 20 in a threaded mode, the upper ends of the moving plates 21 extend out of the cavity and are connected with the second conveying mechanism, and the lower hot pressing plate 26 is located between the two moving plates 21.
Structure more than adopting, after the centre gripping subassembly moved the top of hot press mechanism, drive motor 19 was opened, drive motor 19 drove two-way threaded rod 20 and rotates, thereby drive two movable plates 21 and move in opposite directions, make two movable plates 21 centre gripping respectively in the front and back both sides of timber veneer and polyurethane foam board, then utilize second movable assembly 13 to drive two riser 14 reverse motion, make timber veneer and polyurethane foam board and centre gripping groove 16 break away from, at this moment, utilize second conveying mechanism to drive timber veneer and polyurethane foam board decline, make timber veneer and polyurethane foam board pile up in proper order on hot pressboard 26 down, then open hydraulic stem 8, make movable plate 21 drive hot pressboard 17 decline, utilize the cooperation of hot pressboard 26 and last hot pressboard 17 down, realize the hot pressing operation to the plywood, do not need the manual work to pile up, full automation, the efficiency of work has been improved.
Preferably, the upper end of movable plate 21 is fixed with two risers 22, swivelling joint has two drive rollers 23 between two risers 22, be fixed with conveying motor 24 on one of them riser 22, conveying motor 24's output shaft end and one of them drive roller 23 fixed connection, two drive rollers 23 pass through conveyer belt 25 transmission and connect, be fixed with backup pad 27 between two risers 22, one side that backup pad 27 is close to hot pressboard 26 down is fixed with a plurality of elastic component 28, the other end of elastic component 28 is fixed with gusset plate 29, gusset plate 29 contradicts with the inboard of conveyer belt 25.
Structure more than adopting, when transporting timber veneer and polyurethane foam board, conveying motor 24 drives drive roller 23 and rotates, drive roller 23 drives the conveyer belt 25 rotatory, thereby utilize conveyer belt 25 to drive timber veneer and polyurethane foam board decline, make timber veneer and polyurethane foam board pile up in proper order under on hot pressboard 26, and the setting of elastic component 28 and gusset plate 29, in operation, can utilize the cooperation of elastic component 28 and gusset plate 29, support conveyer belt 25, thereby guarantee the stability of two conveyer belts 25 to timber veneer and polyurethane foam board centre gripping, make timber veneer and polyurethane foam board can steadily fall, prevent timber veneer and polyurethane foam board skew, improve the processingquality of plywood.
Preferably, glue coating mechanism 11 includes storage tank 30, be fixed with feeding pump 31 on the storage tank 30, the discharge end of feeding pump 31 is fixed with first conveying pipeline 32, be fixed with two second conveying pipelines 33 on the first conveying pipeline 32, the other end of second conveying pipeline 33 is fixed with discharging pipe 34, the downside of discharging pipe 34 is fixed with a plurality of shower nozzles 35, and the one end and the storage tank 30 fixed connection of discharging pipe 34, be fixed with two floating subassemblies on the storage tank 30, floating subassembly and discharging pipe 34 one-to-one.
Structure more than adopting, after the centre gripping subassembly moves on rubber coating mechanism 11, first removal subassembly 10 drives storage tank 30 and moves forward, make two discharging pipes 34 be located the top right-hand member of the timber veneer of below and middle polyurethane foam board respectively, then open conveying pump 31, make simultaneously turn on rotating electrical machines 6 and floating subassembly, when shower nozzle 35 with polyurethane adhesive spraying timber veneer and polyurethane foam board on, make timber veneer and polyurethane foam board move to the right, realize the comprehensive spraying to timber veneer and polyurethane foam board, and utilize floating subassembly to float the polyurethane adhesive on timber veneer and polyurethane foam board, make polyurethane adhesive distribute evenly, after discharging pipe 34 shifts out the right-hand member of timber veneer and polyurethane foam board, utilize first removal subassembly 10, make discharging pipe 34 shift backward, break away from the centre gripping subassembly, the setting in reservation space, can make discharging pipe 34 have sufficient spraying space, guarantee the comprehensiveness of spraying.
Preferably, the floating assembly includes fixing base 36, fixing base 36 and storage case 30 fixed connection, spout 41 has been seted up to fixing base 36's downside, spout 41's inside is fixed with slide rail 42, sliding connection has vibrations seat 37 on the slide rail 42, the lower extreme of vibrations seat 37 is fixed with mounting panel 38, mounting panel 38's downside is fixed with a plurality of vertical trowelling boards 39, be fixed with horizontal trowelling board 40 between the adjacent vertical trowelling board 39, the inside swivelling joint of spout 41 has rotation axis 43, be provided with floating motor in the fixing base 36, the output shaft end and the rotation axis 43 fixed connection of floating motor, be fixed with carousel 44 on the rotation axis 43, annular wave groove 45 has been seted up on the rotation disc 44, sliding connection has sliding column 46 in the annular wave groove 45, be fixed with connecting seat 47 on the vibrations seat 37, connecting seat 47 passes through connecting rod 48 and sliding column 46 fixed connection.
By adopting the structure, when the polyurethane adhesive is leveled, the leveling motor is started, the rotating shaft 43 is driven to rotate, the rotating shaft 43 rotates to drive the rotating disc 44 to rotate, so that the sliding column 46 slides in the annular wave groove 45, the sliding column 46 is driven to move left and right in a reciprocating manner by utilizing the annular wave groove 45, the mounting plate 38 drives the longitudinal leveling plate 39 and the transverse leveling plate 40 to vibrate at a high speed in a small range, so that the longitudinal leveling plate 39 performs longitudinal leveling on the polyurethane adhesive, meanwhile, the transverse leveling plate 40 performs transverse leveling, the leveling effect is good, the adhesive force of the plywood, which is not uniformly smeared by the polyurethane adhesive or influenced by bubbles, is prevented, the processing quality of the plywood is improved, the transverse leveling plate 40 can be arranged in the middle part of the longitudinal leveling plate 39, the longitudinal leveling, the transverse leveling and the final longitudinal leveling are realized, and the leveling effect is further improved.
EXAMPLE III
As shown in fig. 1, a method for preparing a polyurethane plywood comprises the following steps:
s1, cutting a polyurethane foam board and a wood veneer into preset sizes, performing sanding treatment on the side edges and the surfaces of the polyurethane foam board and the wood veneer, and removing impurities to obtain a smooth and clean polyurethane foam board and a smooth and clean wood veneer;
s2, soaking the treated polyurethane foam board and the wood veneer into insect-proof liquid at the soaking temperature of 30 ℃ for the following time: 150min;
s3, drying the soaked polyurethane foam board and the soaked wood veneer at the drying temperature of 120 ℃ until the water content reaches 20%;
s4, placing the dried polyurethane foam board and the dried wood veneer into clear water for washing, washing the surfaces of the polyurethane foam board and the wood veneer clean, and drying again at the drying temperature of 180 ℃ until the water content of the polyurethane foam board and the wood veneer reaches 5%;
s5, transferring the dried polyurethane foam board and the dried wood single board into a gluing mechanism by using a first conveying mechanism, simultaneously coating polyurethane adhesive on the wood single board and the dried wood single board by using the gluing mechanism, and trowelling the polyurethane adhesive by using a trowelling assembly during gluing;
s6, after the smearing is completed, the polyurethane foam board and the wood single board are transferred to a hot pressing mechanism through the first conveying mechanism, the polyurethane foam board and the wood single board are stacked on a lower hot pressing board of the hot pressing mechanism through the second conveying mechanism, and then the polyurethane foam board is pressed between the two wood single boards through the cooperation of the upper hot pressing board and the lower hot pressing board, so that the polyurethane plywood is obtained.
Preferably, the sizing amount of the wood veneer and the polyurethane foam board in S5 are both 380g/m2.
Preferably, the temperature of the hot pressing in S6 is 110 ℃ and the pressing time is 60min.
Preferably, after the pressurization is finished, the pressure is maintained for 20min, and then the pressure is released, wherein the hot pressing pressure required by the pressure maintaining is 1.8MPa.
The plywood processing equipment adopted in the preparation method of the polyurethane plywood in the embodiments S2 to S6 is the same as that in the embodiment, and the difference is that the process conditions are different.
Example four
As shown in fig. 1, a method for preparing a polyurethane plywood comprises the following steps:
s1, cutting a polyurethane foam board and a wood veneer into preset sizes, performing sanding treatment on the side edges and the surfaces of the polyurethane foam board and the wood veneer, and removing impurities to obtain a smooth and clean polyurethane foam board and a smooth and clean wood veneer;
s2, soaking the treated polyurethane foam board and the wood veneer into insect-proof liquid at the soaking temperature of 45 ℃ for the following time: 100min;
s3, drying the soaked polyurethane foam board and the soaked wood veneer at the drying temperature of 150 ℃ until the water content reaches 15%;
s4, placing the dried polyurethane foam board and the dried wood veneer into clear water for washing, washing the surfaces of the polyurethane foam board and the wood veneer clean, and drying the polyurethane foam board and the wood veneer again at the drying temperature of 140 ℃ until the water content of the polyurethane foam board and the wood veneer reaches 9%;
s5, transferring the dried polyurethane foam board and the dried wood single board into a gluing mechanism by using a first conveying mechanism, simultaneously coating polyurethane adhesive on the wood single board and the dried wood single board by using the gluing mechanism, and trowelling the polyurethane adhesive by using a trowelling assembly during gluing;
s6, after the smearing is completed, the polyurethane foam board and the wood single board are transferred to a hot pressing mechanism through the first conveying mechanism, the polyurethane foam board and the wood single board are stacked on a lower hot pressing board of the hot pressing mechanism through the second conveying mechanism, and then the polyurethane foam board is pressed between the two wood single boards through the cooperation of the upper hot pressing board and the lower hot pressing board, so that the polyurethane plywood is obtained.
Preferably, the sizing amount on the wood veneer and the polyurethane foam board in S5 are both 330g/m2.
Preferably, the temperature of the hot pressing in S6 is 120 ℃ and the pressing time is 40min.
Preferably, after the pressurization is finished, the pressure is maintained for 30min, and then the pressure is released, wherein the hot pressing pressure required by the pressure maintaining is 1.4MPa.
The plywood processing equipment adopted in the preparation method of the polyurethane plywood in the embodiments S2 to S6 is the same as that in the embodiment, and the difference is that the process conditions are different.
Examples of the experiments
The performance tests of the polyurethane plywood prepared in the examples 1-4 are compared according to the national standard, and the performance test indexes are shown in the following table:
as can be seen from the test data in the above table, the flexible modulus, the static bending strength, the wet strength and the peel adhesion of the polyurethane plywood prepared in example two are all higher than those of the polyurethane plywood prepared in example one, and therefore, the flexible modulus, the static bending strength, the wet strength and the peel adhesion of the polyurethane plywood can be improved comprehensively by using the plywood processing equipment of the present invention.
In comparison with the third and fourth examples, the process conditions of only processing temperature, time and the like are different, the equipment used in the production steps is the same, and the elastic modulus, the static bending strength, the wet strength and the peel adhesion of the polyurethane plywood prepared in the third and fourth examples are lower than those of the polyurethane plywood prepared in the second example, so that it can be seen that the process conditions of processing temperature, time and the like also affect the elastic modulus, the static bending strength, the wet strength and the peel adhesion of the polyurethane plywood.
The preparation method of the polyurethane plywood is simple to operate, easy to implement, good in environmental protection performance and good in linkage effect among preparation devices, can realize flow processing of the plywood, improves processing efficiency, reduces processing cost, can simultaneously glue a polyurethane foam board and a wood veneer during gluing and hot pressing, and then simultaneously carries out hot press molding, so that the preparation steps are reduced, the plywood cannot be subjected to hot pressing for many times, and the adhesive force of the plywood can be improved.
By adopting the plywood processing equipment, the linkage operation of the device is realized, the cost of the equipment is reduced, the processing quality of the plywood is improved, the drying of the base material and the hot press molding of the plywood are realized by utilizing the upper hot press plate, the cost of the equipment is reduced, the polyurethane foam plate and the wood veneer can be simultaneously subjected to gluing and hot pressing, the adhesive force between the plywood is ensured, and the processing quality of the plywood is improved.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (10)
1. The preparation method of the polyurethane plywood is characterized by comprising the following steps of:
s1, cutting a polyurethane foam board and a wood veneer into preset sizes, performing sanding treatment on the side edges and the surfaces of the polyurethane foam board and the wood veneer, and removing impurities to obtain a smooth and clean polyurethane foam board and a smooth and clean wood veneer;
s2, soaking the treated polyurethane foam board and the wood veneer into insect-proof liquid at the soaking temperature of 30-45 ℃ for the following time: 100-150min;
s3, drying the soaked polyurethane foam board and the soaked wood veneer at the drying temperature of 120-150 ℃ until the water content reaches 15-20%;
s4, putting the dried polyurethane foam board and the dried wood veneer into clear water for washing, washing the surfaces of the polyurethane foam board and the wood veneer, drying again at the drying temperature of 140-180 ℃ until the water content of the polyurethane foam board and the wood veneer reaches 5-9%;
s5, transferring the dried polyurethane foam board and the dried wood single board into a gluing mechanism by using a first conveying mechanism, simultaneously coating polyurethane adhesive on the wood single board and the dried wood single board by using the gluing mechanism, and trowelling the polyurethane adhesive by using a trowelling assembly during gluing;
s6, after the smearing is completed, the polyurethane foam board and the wood single board are transferred to a hot pressing mechanism through the first conveying mechanism, the polyurethane foam board and the wood single board are stacked on a lower hot pressing board of the hot pressing mechanism through the second conveying mechanism, and then the polyurethane foam board is pressed between the two wood single boards through the cooperation of the upper hot pressing board and the lower hot pressing board, so that the polyurethane plywood is obtained.
2. The method of claim 1, wherein the wood veneer and the polyurethane foam board in S5 are applied with glue in an amount of 330-380g/m 2 。
3. The method for preparing polyurethane plywood as claimed in claim 1, wherein the temperature of the hot pressing in S6 is 110-120 ℃ and the pressing time is 40-60min.
4. The method for preparing polyurethane plywood according to claim 3, wherein after the pressurization is completed, the pressure is maintained for 20-30min, and then the pressure is released, and the hot pressing pressure required for the pressure maintaining is 1.4-1.8MPa.
5. The method for manufacturing polyurethane plywood according to claim 1, the equipment adopted in the steps S2-S6 is plywood processing equipment which comprises a base (1), the left end of base (1) is fixed with soaking case (2), the right-hand member of base (1) is fixed with support frame (4), be provided with first conveying mechanism between soaking case (2) and support frame (4), first conveying mechanism include with soaking case (2) upper end fixed connection's pillar (3), swivelling joint has threaded rod (5) between pillar (3) and support frame (4), be fixed with rotating electrical machines (6) on support frame (4), the output axle head of rotating electrical machines (6) and the one end fixed connection of threaded rod (5), threaded rod (5) are gone up threaded connection and are removed seat (7), be fixed with hydraulic stem (8) on removing seat (7), the other end of hydraulic stem (8) is provided with the centre gripping subassembly, be provided with hot platen (17) on the centre gripping subassembly, still be provided with first removal subassembly (10) on base (1), be provided with on the removal subassembly and glue coating mechanism (11), glue coating mechanism (11) are located and soak between soaking case (2) and support frame (4), be provided with hot press mechanism in support frame (4), be provided with second conveying mechanism on the hot pressing.
6. The preparation method of the polyurethane plywood according to claim 5, wherein the clamping mechanism (9) comprises a sealing plate (12), the sealing plate (12) is fixedly connected with the telescopic end of the hydraulic rod (8), a second moving assembly (13) is fixed on the other side of the sealing plate (12), two vertical plates (14) are arranged on the second moving assembly (13), three clamping seats (15) are fixed on the opposite surfaces of the two vertical plates (14), a clamping groove (16) is formed in each clamping seat (15), a reserved space is formed between each clamping seat (15) and each clamping groove (16), and an upper hot pressing plate (17) is arranged on the lower side of the second moving assembly (13).
7. The preparation method of polyurethane plywood according to claim 5, wherein the hot pressing mechanism comprises a supporting base (18), a lower hot pressing plate (26) is fixed on the supporting base (18), a cavity is formed in the supporting base (18), a driving motor (19) is fixed on the supporting base (18), a bidirectional threaded rod (20) extending into the cavity is fixed at an output shaft end of the driving motor (19), two moving plates (21) are connected to the bidirectional threaded rod (20) in a threaded manner, the upper ends of the moving plates (21) extend out of the cavity and are connected with the second conveying mechanism, and the lower hot pressing plate (26) is located between the two moving plates (21).
8. The preparation method of a polyurethane plywood according to claim 7, wherein two vertical plates (22) are fixed at the upper end of the moving plate (21), two driving rollers (23) are rotatably connected between the two vertical plates (22), one of the vertical plates (22) is fixed with a conveying motor (24), the output shaft end of the conveying motor (24) is fixedly connected with one of the driving rollers (23), the two driving rollers (23) are in transmission connection through a conveying belt (25), a supporting plate (27) is fixed between the two vertical plates (22), one side of the supporting plate (27) close to the lower hot-pressing plate (26) is fixed with a plurality of elastic assemblies (28), the other end of each elastic assembly (28) is fixed with a reinforcing plate (29), and the reinforcing plate (29) is abutted against the inner side of the conveying belt (25).
9. The method for preparing polyurethane plywood according to claim 5, wherein the gluing mechanism (11) comprises a storage tank (30), a feed delivery pump (30) is fixed on the storage tank (30), a first feed delivery pipe (32) is fixed at the discharge end of the feed delivery pump (31), two second feed delivery pipes (33) are fixed on the first feed delivery pipe (32), a discharge pipe (34) is fixed at the other end of each second feed delivery pipe (33), a plurality of spray heads (35) are fixed on the lower side of the discharge pipe (34), one end of the discharge pipe (34) is fixedly connected with the storage tank (30), two leveling components are fixed on the storage tank (30), and the leveling components correspond to the discharge pipes (34) one to one.
10. The preparation method of a polyurethane plywood as claimed in claim 9, wherein the trowelling assembly includes a fixed base (36), the fixed base (36) is fixedly connected with the storage box (30), a sliding groove (41) is formed in the lower side of the fixed base (36), a sliding rail (42) is fixed inside the sliding groove (41), a vibration base (37) is slidably connected onto the sliding rail (42), a mounting plate (38) is fixed to the lower end of the vibration base (37), a plurality of longitudinal trowelling plates (39) are fixed to the lower side of the mounting plate (38), a transverse trowelling plate (40) is fixed between adjacent longitudinal trowelling plates (39), a rotating shaft (43) is rotatably connected inside the sliding groove (41), a trowelling motor is arranged inside the fixed base (36), an output of the trowelling motor is fixedly connected with the rotating shaft (43), a rotating disc (44) is fixed on the rotating shaft (43), a wavy groove (45) is formed in the rotating disc (44), a sliding column (46) is slidably connected inside the wavy groove (45), a connecting base (47) is fixed on the vibration base (37), and the connecting base (47) is fixedly connected with the sliding column (46) through a connecting rod (48).
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| CN115179373B (en) | 2023-05-09 |
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Effective date of registration: 20230410 Address after: No. 88, Xiaoxuzhuang Village, Dazhong Village Town, Lanling County, Linyi City, Shandong Province, 277700 Applicant after: Lanling County Senguangyuan Wood Industry Co.,Ltd. Address before: No. 17, East Junzi Ting Road, Kunshan City, Suzhou City, Jiangsu Province, 215000 Applicant before: Zhou Meijun |
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