A polyurethane-sealed rock wool composite board and its preparation process

Abstract

This invention discloses a polyurethane-sealed rock wool composite board and its preparation process, belonging to the field of composite board production technology. The process includes uncoiling, edge trimming, molding, gluing, pressing and sealing, curing, and cutting. The gluing mechanism includes two support plates, each equipped with a first drive motor, a first ball screw, and a movable rod. The end of the movable rod is connected to a glue storage box, and the surface of the glue storage box is equipped with glue spray heads facing opposite directions, spraying glue onto the upper and lower surfaces of the rock wool board and the opposite surface of the metal sheet. The first drive motor drives the glue spray heads to reciprocate, achieving uniform glue application. The conveying mechanism includes a movable plate, with multiple rotating rollers with protrusions mounted on its side. A third drive motor drives the rotating rollers to rotate synchronously, actively conveying the rock wool board. This invention also includes a leveling guide roller and an automatic tensioning mechanism. This invention achieves synchronous and uniform glue application to multiple surfaces and active and stable conveying, avoiding fiber damage to the rock wool board surface and improving bonding quality and production efficiency.

Description

Technical Field

[0001] This invention relates to the field of composite board production technology, and in particular to a polyurethane-sealed rock wool composite board and its preparation process. Background Technology

[0002] Polyurethane-sealed rock wool composite board is a new type of building insulation material. It consists of two layers of thin metal plates, a rock wool insulation layer in the middle, and a polyurethane sealing structure. It has excellent thermal insulation performance, fire resistance, and structural strength, and is widely used in building envelope systems such as industrial plants, cold storage, and clean rooms.

[0003] In the production process of polyurethane-sealed rock wool composite panels, the adhesive application process between the rock wool board and the thin metal sheet is a crucial step affecting the bonding quality of the composite panel. Existing adhesive application mechanisms typically employ fixed spray nozzles, with the rock wool board sliding along a track as it passes beneath the nozzle to complete the adhesive application. However, this method presents the following technical problems:

[0004] In existing technologies, the glue spray head is typically mounted in a fixed position on the frame, and its spraying angle and spraying range cannot be adjusted. When the conveying speed of the rock wool board fluctuates, the board surface warps slightly, or the width specifications change, the fixed glue spraying trajectory is difficult to precisely match the actual surface of the rock wool board. This easily leads to glue accumulation at the edges of the board surface, while glue-deficient areas appear in the middle or ends of the board surface. Local glue deficiency directly reduces the bonding strength between the rock wool board and the metal sheet, and is prone to quality defects such as peeling and hollowing during long-term use. On the other hand, excessive glue not only wastes glue, but may also overflow in subsequent lamination processes, affecting the cleanliness of the board surface and the quality of edge sealing. In severe cases, it may even lead to uneven polyurethane foam molding.

[0005] To address the aforementioned issues, the applicant designed a first-generation adhesive application mechanism, such as... Figure 1 As shown. However, in actual use, the applicant found that the organization still has some technical problems: rock wool boards are usually conveyed by sliding on inclined tracks by their own weight. The speed of this conveying method is difficult to control precisely, especially when the slope of the track and the coefficient of friction of the board surface change. The rock wool boards are prone to uneven sliding speed, deviation, or even jamming, affecting the synchronization of the adhesive application sequence. More importantly, the continuous friction between the rock wool board and the track surface during the sliding process can easily cause the surface fibers to break, powder, or fall off, damaging the microstructure of the rock wool board surface, thereby weakening the wetting and anchoring effect of the adhesive on the rock wool substrate; because the track lifts and obstructs the bottom of the rock wool board, the adhesive can only be sprayed on one side of the metal sheet below, and the bottom of the rock wool board cannot be sprayed, resulting in a decrease in adhesion and ultimately affecting the overall bonding strength and durability of the composite board.

[0006] In summary, existing gluing mechanisms have significant shortcomings in terms of gluing uniformity, conveying stability, and multi-surface simultaneous gluing capability. There is an urgent need to develop a new gluing mechanism that can achieve reciprocating motion for uniform gluing, active and stable conveying, and multi-surface simultaneous gluing, in order to improve the overall quality and production efficiency of polyurethane edge-sealed rock wool composite panels. Summary of the Invention

[0007] The purpose of this invention is to address the technical deficiencies in the prior art by proposing a polyurethane-sealed rock wool composite board and its preparation process.

[0008] To achieve the above objectives, the technical solution adopted by this invention is as follows: a preparation process for a polyurethane-sealed rock wool composite board, comprising the following steps:

[0009] Step 1: Place the steel sheet coils on the upper and lower uncoiling mechanisms and uncoil them simultaneously;

[0010] Step 2: Coat the two rolls of thin metal sheet with film and trim the edges. At the same time, slit and rewind the trimmed edges.

[0011] Step 3: Pass the two trimmed metal sheets through a forming machine or molding machine in sequence to prepare the preset concave and convex shapes;

[0012] Step 4: After the rock wool boards are cut by the rock wool cutting device, they are stacked on the conveyor belt. The multiple neatly arranged rock wool boards, as well as the metal sheets placed above and below the rock wool boards, are conveyed to the gluing mechanism.

[0013] Step 5: At the glue application mechanism, the rock wool board is positioned between the two metal sheets, and then the glue is applied to the contact surface between the rock wool board and the two metal sheets through the glue application mechanism.

[0014] Step 6: Simultaneously output the glued rock wool board and two metal sheets to the pressing mechanism to press them together to form a combined board; at the same time, extrude polyurethane mixture to seal the edges on both sides of the rock wool board and between the two metal sheets.

[0015] Step 7: The assembled panels are preheated in the preheating system.

[0016] Step 8: The preheated board enters the edge sealing and curing device, where the polyurethane mixture on both sides is extruded and heat-set to obtain a cured continuous board.

[0017] Step 9: The cured continuous sheet is cut into preset lengths using a band saw cutting system;

[0018] Step 10: The palletizing system automatically stacks the items, and the packaging system completes the packaging.

[0019] Preferably, the glue application mechanism includes two support plates arranged from top to bottom. A first drive motor is installed on the top of the two support plates. A first ball screw is installed on the movable end of the first drive motor. The movable end of the first ball screw is connected to one end of a movable rod. The other end of the movable rod extends to one side of the conveying mechanism and is connected to a glue storage box. The two glue storage boxes are located above and below the conveying mechanism, respectively. Two glue spraying heads with opposite orientations are installed on the surface of each of the two glue storage boxes, which are used to spray glue onto the upper and lower surfaces of the rock wool board and the opposite surfaces of the two metal sheets, respectively.

[0020] Preferably, a bracket is installed between the two support plates, and support blocks are installed on both symmetrical sides of the bracket. The bottom of the support plate is placed on the top of the two support blocks, and guide rods are installed at both ends of the support plate. The bottom ends of the guide rods penetrate the top of the support blocks and extend below them. A second drive motor is installed on both symmetrical sides of the bracket. The movable end of the second drive motor is connected to two worm gear transmission components in sequence through a transmission shaft. The top ends of the worms in the two worm gear transmission components are installed at the bottom of the support plate.

[0021] Preferably, two pulley support plates are installed on the top of the support plate, and a pulley is installed between the two pulley support plates. The bottom of the movable rod slides in contact with the arc surface of the pulley.

[0022] Preferably, a guide fixing frame is installed on the top of the support plate, and an installation groove is opened on the surface of the guide fixing frame. The first ball screw is installed in the installation groove, and both ends of the first ball screw are installed through bearings on both ends of the inner wall of the installation groove.

[0023] Preferably, the conveying mechanism includes two symmetrically arranged fixed plates located on one side of the support; a parallel movable plate is provided between the two fixed plates, and a second electric cylinder is installed at both ends of the two fixed plates. The movable end of the second electric cylinder passes through the side of the fixed plate and is installed on the side of the movable plate. Multiple rotating rollers are installed on the side of the two movable plates through mounting concave seats, and multiple protrusions are installed along the arc surface of the rotating rollers.

[0024] Preferably, two coaxially fixed transmission gears are connected to the top of each of two adjacent rotating rollers along the length of the movable plate, and a transmission gear chain connects the transmission gears on the two adjacent rotating rollers.

[0025] Two rotating rollers are located at the ends and are positioned correspondingly along the width direction of the movable plate. One of the rotating rollers has a drive gear meshing with a guide gear on one side above it. The guide gear is mounted on the surface of the movable plate via a rotating shaft. The lower end of the other rotating roller is connected to a third drive motor.

[0026] A U-shaped ball screw mounting seat is provided between the two corresponding rotating rollers. The two ends of a bidirectional helical ball screw are mounted on the inner walls of the mounting seat via bearings. The helical directions of the left and right sides of the bidirectional helical ball screw are opposite. Movable sleeves are provided on the opposite helical directions of the bidirectional helical ball screw. A limit groove is formed on the lower surface of the ball screw mounting seat. A slider is installed at the lower part of the two movable sleeves, extending into the limit groove and sliding along it. Tensioning gears are mounted on both movable sleeves via rotating shafts. A ring-shaped tensioning gear chain connects the two tensioning gears, the guide gear, and the transmission gear coaxially mounted with the third drive motor.

[0027] Preferably, one end of the lead screw of the bidirectional helical ball screw passes through the ball screw mounting seat and is mounted with a driven gear through a rotating shaft; a rack is meshed on one side of the driven gear, one end of the rack is slidably inserted into one end of the guide groove, and the other end of the guide groove and the other end of the rack are respectively mounted on two movable plates through brackets.

[0028] Preferably, a first electric cylinder is installed at each end of the two fixed plates, a roller mounting plate is installed between the movable ends of the two first electric cylinders, and a leveling guide roller is connected below the roller mounting plate.

[0029] The polyurethane-sealed rock wool composite board of the present invention includes two parallel and opposite metal sheets, with a rock wool board and a polyurethane strip between the two metal sheets, and the side of the polyurethane strip is cured and connected to the side of the rock wool board.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] This invention employs a reciprocating adhesive application structure. Through the coordination of a first drive motor, a first ball screw, and a movable rod, the adhesive storage box and the spray nozzle reciprocate linearly along the conveying direction of the rock wool board. The spray nozzle continuously sprays adhesive during its movement, forming a continuous and uniform adhesive layer on the surface of the rock wool board. This overcomes the problems of localized adhesive shortages or adhesive buildup caused by the fixed spraying position of traditional fixed spray nozzles, effectively improving the overall bonding quality of the composite board.

[0032] In existing technologies, rock wool boards rely entirely on sliding tracks in the adhesive application area, leading to fiber damage and adhesive blockage. This invention retains the track only in the transition section before adhesive application, replacing it with an active conveying mechanism in the adhesive application area. The track guides the rock wool board to the improved conveying mechanism. Multiple rotating rollers with protrusions are installed on a movable plate, and a third drive motor, transmission gears, and gear chains ensure synchronous rotation of all rollers. This allows the rock wool board to be actively and smoothly conveyed forward under the frictional force between the protrusions and the board surface. This structure completely eliminates problems such as speed fluctuations, offset, and jamming when the rock wool board slides on the inclined track, achieving precise control of the conveying speed. More importantly, the contact between the protrusions and the rock wool board is rolling contact, changing the friction mode from sliding friction to rolling friction. This significantly reduces damage to the surface fibers of the rock wool board, maintains the integrity of the microstructure of the rock wool board surface, and creates favorable conditions for good adhesive wetting and anchoring. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the conveying mechanism structure before the improvement in the background art of the present invention;

[0034] Figure 2 This is a schematic diagram of the adhesive coating mechanism of the present invention;

[0035] Figure 3 This is a connection structure diagram of the first drive motor and the first ball screw of the present invention;

[0036] Figure 4 This is a schematic diagram of the improved conveying mechanism and adhesive coating mechanism of the present invention;

[0037] Figure 5 This is a schematic diagram of the conveying mechanism of the present invention;

[0038] Figure 6 This is a schematic diagram showing the installation position of the glue spraying head on the glue spraying mechanism in this invention;

[0039] Figure 7 This is a schematic diagram of the installation structure of the tensioning gear and guide gear of the present invention;

[0040] Figure 8 This is a schematic diagram showing the connection between the bidirectional helical ball screw, tension gear, driven gear, and rack of the present invention.

[0041] Figure 9 This is a schematic diagram of the connection between the guide groove and the rack of the present invention;

[0042] Figure 10 This is a schematic diagram of the structure of the polyurethane-sealed rock wool composite panel of the present invention;

[0043] Figure 11 This is a schematic diagram of the arrangement structure of the rock wool board of the present invention.

[0044] In the diagram: 1. Lower layer metal sheet conveyor; 2. Slide rail; 3. Glue spray head; 4. Glue storage box; 5. First drive motor; 6. Movable rod; 7. Guide fixing frame; 8. Worm gear transmission component; 9. Support plate; 10. Drive shaft; 11. Pulley support plate; 12. Support block; 13. Second drive motor; 14. Guide rod; 15. Bracket; 16. Pulley; 17. First ball screw; 18. First electric cylinder; 19. Leveling guide roller; 20. Roller mounting plate; 21. Movable plate; 22. Fixing plate; 23. Second electric cylinder; 24. Third drive motor; 25. Rotating roller; 26. Movable sleeve; 27. Protrusion; 28. Transmission gear; 29. ​​Transmission gear chain; 30. Mounting concave seat; 31. Mounting groove; 32. Driven gear; 33. Guide groove component; 34. Rack; 35 36. Tensioning gear chain; 37. Bidirectional spiral ball screw; 38. Tensioning gear; 39. Guide gear; 40. Limiting groove; 41. Slider; 42. Ball screw mounting base; 43. Metal sheet; 44. Polyurethane strip; 45. Rock wool board. Detailed Implementation

[0045] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0046] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this invention, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," and "set up" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. The following describes embodiments of the invention based on its overall structure.

[0047] like Figure 10 The polyurethane-sealed rock wool composite panel shown includes two parallel and oppositely arranged metal sheets 42. A rock wool board 44 and a polyurethane strip 43 are disposed between the two metal sheets 42, and the side of the polyurethane strip 43 is connected to the side of the rock wool board 44. Figure 11 As shown, the rock wool board 44 between the two metal sheets 42 has been cut into individual strips and arranged in a staggered manner, like a wooden floor.

[0048] This invention also provides a preparation process for a polyurethane-sealed rock wool composite board, comprising the following steps:

[0049] Step 1: Place the steel sheet coils on the upper and lower uncoiling mechanisms and uncoil them simultaneously;

[0050] Step 2: Coat the two rolls of thin metal sheet with film and trim the edges. At the same time, slit and rewind the trimmed edges.

[0051] Step 3: Pass the two trimmed metal sheets through a forming machine or molding machine in sequence to prepare the preset concave and convex shapes;

[0052] Step 4: After the rock wool boards are cut by the rock wool cutting device, they are stacked on the conveyor belt. The multiple neatly arranged rock wool boards, as well as the metal sheets placed above and below the rock wool boards, are conveyed to the gluing mechanism.

[0053] Step 5: At the glue application mechanism, the rock wool board is positioned between the two metal sheets, and then the glue is applied to the contact surface between the rock wool board and the two metal sheets through the glue application mechanism.

[0054] Step 6: Simultaneously output the glued rock wool board and two metal sheets to the pressing mechanism to press them together to form a combined board; at the same time, extrude polyurethane mixture to seal the edges on both sides of the rock wool board and between the two metal sheets.

[0055] Step 7: The assembled panels are preheated in the preheating system.

[0056] Step 8: The preheated board enters the edge sealing and curing device, where the polyurethane mixture on both sides is extruded and heat-set to obtain a cured continuous board.

[0057] Step 9: The cured continuous sheet is cut into preset lengths using a band saw cutting system;

[0058] Step 10: The palletizing system automatically stacks the items, and the packaging system completes the packaging.

[0059] like Figure 1-9As shown, to match the manufacturing process, the present invention has also specifically improved the glue application mechanism and the conveying mechanism. The glue application mechanism includes two support plates 9 arranged from top to bottom. A first drive motor 5 is installed on the top of the two support plates 9. A first ball screw 17 is installed on the movable end of the first drive motor 5. A movable rod 6 is provided above the first ball screw 17. One end of the movable rod 6 extends to one side of the conveying mechanism. One end of the movable rod 6 is connected to a glue storage box 4. The two glue storage boxes 4 are located above and below the conveying mechanism, respectively. Two glue spraying heads 3 facing opposite directions are installed on the end faces of the two glue storage boxes 4, which are used to spray glue onto the upper and lower surfaces of the rock wool board 44 and the opposite surfaces of the two metal sheets 42, respectively.

[0060] During operation, the movable end of the first drive motor 5 is controlled to rotate in both forward and reverse directions, thereby driving the first ball screw 17 to rotate. The movable end of the first ball screw 17 can drive the movable rod 6 to move back and forth in a straight line, thereby causing the glue storage box 4 and the glue spraying head 3 to move back and forth above and below the rock wool board 44. This reciprocating glue application method allows the glue spraying head to spray a uniform glue layer on the surface of the rock wool board 44 and the metal sheet 42, overcoming the defect of uneven glue application caused by fixed glue spraying heads.

[0061] A bracket 15 is installed between two support plates 9. Support blocks 12 are installed on both symmetrical sides of the bracket 15. The bottom of the support plate 9 rests on the top of the two support blocks 12. Guide rods 14 are installed at both ends of the support plate 9, with the bottom ends of the guide rods 14 penetrating the top of the support blocks 12 and extending below them. Second drive motors 13 are installed on both symmetrical sides of the bracket 15. The movable ends of the second drive motors 13 are connected to two worm gear transmission components 8 in sequence via a transmission shaft 10. The top ends of the worms in the two worm gear transmission components 8 are installed at the bottom of the support plate 9. This structure allows the second drive motor 13 to drive the two worm gear transmission components 8 to move synchronously via the transmission shaft 10. The worms in the worm gear transmission components 8 move up and down, thereby causing the support plate 9 to rise and fall along the direction of the guide rods 14. By controlling the rise and fall of the support plate 9, the distance between the spray nozzle and the surfaces of the rock wool board 44 and the metal sheet 42 can be adjusted, thus adapting to the adhesive application needs of rock wool boards 44 and metal sheets 42 of different thicknesses and improving the versatility of the adhesive application mechanism.

[0062] Two pulley support plates 11 are installed on the top of the support plate 9, and a pulley 16 is installed between the two pulley support plates 11. The bottom of the movable rod 6 slides in contact with the arc surface of the pulley 16. The pulley 16 provides support and guidance for the movable rod 6, reduces the frictional resistance of the movable rod 6 during reciprocating movement, and improves the smoothness and reliability of the movement.

[0063] A guide frame 7 is mounted on the top of the support plate 9. The surface of the guide frame 7 has a mounting groove 31. The first ball screw 17 is installed in the mounting groove 31, with both ends of the first ball screw 17 passing through bearings and mounted on the inner wall of the mounting groove 31. This installation structure ensures the stability of the first ball screw 17's installation position and smooth rotation. The movable end of the first ball screw 17 can slide back and forth in a straight groove 31, guaranteeing the accuracy of the reciprocating motion of the movable rod 6.

[0064] Another core innovation of this invention lies in the improved conveying mechanism, replacing the traditional sliding conveying method with a sliding connection active conveying structure. Specifically, two symmetrically arranged fixing plates 22 are provided on one side of the support 15, and the support 15 can be fixedly connected to the ground by bolts, thereby improving the stability of the support 15. First, the rock wool board 44 is conveyed to the front end of the conveying mechanism using the existing slide 2, and then the conveying mechanism clamps and conveys the rock wool board 44 from both sides, without obstructing the upper and lower surfaces of the rock wool board 44, enabling double-sided adhesive spraying.

[0065] One of the fixed plates 22 is connected to the bracket 15. A movable plate 21 arranged in parallel is provided between the two fixed plates 22. A second electric cylinder 23 is installed at both ends of the two fixed plates 22. The movable end of the second electric cylinder 23 passes through the side of the fixed plate 22 and is installed on the side of the movable plate 21. By controlling the extension and retraction of the four second electric cylinders 23, the distance between the two movable plates 21 can be adjusted to meet the conveying requirements of rock wool boards 44 of different widths.

[0066] Multiple rotating rollers 25 are mounted on the sides of both movable plates 21 via mounting concave seats 30. Multiple protrusions 27 are mounted along the arc surface of the rotating rollers 25. The protrusions 27 increase the friction between the rotating rollers 25 and the rock wool board 44, enabling the rotating rollers 25 to effectively drive the rock wool board 44 forward while avoiding damage to the surface fibers of the rock wool board 44.

[0067] Along the length of the movable plate 21, each adjacent rotating roller 25 is connected to a transmission gear 28, and a transmission gear chain 29 connects the two adjacent transmission gears 28. At the ends of the movable plate 21, two corresponding rotating rollers 25 are located, one of which has a guide gear 38 meshing with one side of a transmission gear 28 above it. The guide gear 38 is mounted on the surface of the movable plate 21 via a rotating shaft. The lower end of the other rotating roller 25 is connected to a third drive motor 24.

[0068] A U-shaped ball screw mounting seat 41 is provided between the two corresponding rotating rollers 25. The two ends of a bidirectional helical ball screw 36 are respectively mounted on the inner walls of the two sides of the ball screw mounting seat 41 via bearings. The helical directions of the left and right sides of the bidirectional helical ball screw 36 are opposite. Movable sleeves 26 are respectively provided on the helical directions of the bidirectional helical ball screw 36. A limiting groove 39 is formed on the lower surface of the ball screw mounting seat 41. A slider 40 is installed on the lower part of the two movable sleeves 26. The slider 40 extends into the limiting groove 39 and can slide along the limiting groove 39. A tensioning gear 37 is mounted on each of the two movable sleeves 26 via a rotating shaft. An annular tensioning gear chain 35 is connected and fitted between the two tensioning gears 37, the guide gear 38, and the transmission gear 28 coaxially mounted with the third drive motor 24.

[0069] One end of the bidirectional helical ball screw 36 extends out of the ball screw mounting base 41 and is mounted with a driven gear 32 via a rotating shaft; a rack 34 meshes with one side of the driven gear 32, and one end of the rack 34 slides into the groove of one end of the guide groove 33. The other end of the guide groove 33 and the other end of the rack 34 are respectively mounted on two movable plates 21 via brackets.

[0070] When the distance between the two movable plates 21 changes, the relative position between the rack 34 and the driven gear 32 changes, driving the driven gear 32 to rotate, which in turn drives the screw of the double-sided helical ball screw 36 to rotate. Since the helical directions of the double-sided helical ball screw 36 are opposite, when the screw rotates, the two movable sleeves 26 on the double-sided helical ball screw 36 will move synchronously towards or away from each other, thereby driving the tension gear 37 to move, ensuring that the tension gear chain 35 remains taut. This automatic tensioning mechanism ensures the stability and reliability of the gear chain transmission; regardless of the change in the distance between the movable plates 21, the transmission system maintains a good working condition. The cooperation between the limiting groove 39 and the slider 40 guides and limits the movable end of the double-sided helical ball screw 36, ensuring its linearity and stability of movement.

[0071] A first electric cylinder 18 is installed at the end of each of the two fixed plates 22. A roller mounting plate 20 is installed between the moving ends of the two first electric cylinders 18, and a leveling guide roller 19 is connected below the roller mounting plate 20. The rock wool board 44 reaches the connection point with the conveying mechanism from the slide 2. Driven by the first electric cylinders 18, the leveling guide roller 19 moves downward to flatten and smooth the surface of the rock wool board 44, making the upper surface of the rock wool board 44 uniform in height and flat, which can further improve the molding quality. It should be noted that when the front end of the rock wool board 44 enters the conveying mechanism, the lower rear end is still supported by the slide 2. When the leveling guide roller 19 presses down on the rock wool board 44, it will not fall off. Furthermore, the front end of the conveying mechanism is connected to the slide 2, and the rear end is connected to the pressing mechanism. The conveying mechanism only clamps and conveys the rock wool board 44 on both sides in the middle section. During this period, the rock wool board 44 is not completely suspended. One end is always supported by the slide 2 or the pressing mechanism. Furthermore, since the rock wool boards 44, which have been independently cut into strips, are arranged in a staggered manner with the same length direction, there is good friction between adjacent rock wool boards 44. While the rock wool boards 44 in front and on the left and right sides are clamped and conveyed forward, they can simultaneously drive the rock wool boards 44 on the same side and behind to be sequentially pulled into the conveying mechanism.

[0072] When the adhesive coating mechanism of the present invention is working, the conveying mechanism causes the rock wool board 44 to be actively conveyed forward under the drive of the rotating roller 25. The third drive motor 24 drives all the rotating rollers 25 to rotate synchronously through transmission components such as transmission gear 28, transmission gear chain 29, and tension gear chain 35. The protrusions 27 on the surface of the rotating roller 25 contact the rock wool board 44, and drive the rock wool board 44 to move by friction. At the same time, the metal sheet 42 located above the rock wool board 44 is conveyed and fed by the guide rollers located at the front and rear ends of the upper part of the conveying mechanism. Since the guide rollers only roll and support the front and rear ends of the upper metal sheet 42, they do not block the adhesive spraying area on the lower surface of the upper metal sheet 42. The metal sheet 42 located below the rock wool board 44 is supported and conveyed by the lower metal sheet conveyor 1, and the upper surface of the lower metal sheet 42 is the adhesive spraying area.

[0073] Two sets of glue storage boxes 4 and their corresponding glue spraying heads 3 move back and forth along the conveying direction of the rock wool board 44 under the drive of the first drive motor 5, so as to uniformly apply glue to the upper and lower surfaces of the rock wool board 44 and the surfaces of the upper and lower metal sheets 42.

[0074] In this design, the top of the glue storage box 4 is equipped with a glue replenishment interface, which is connected to an external glue tank via a flexible glue supply hose. The flexible glue supply hose is arranged along the cable chain and extends and retracts with the reciprocating movement of the glue storage box 4. A glue supply pump is installed inside the external glue tank, and a liquid level sensor is installed inside the glue storage box 4. The liquid level sensor is electrically connected to the glue supply pump. When the glue level in the glue storage box 4 is lower than a set value, the glue supply pump automatically starts replenishing glue; when the liquid level reaches the upper limit, the glue supply pump stops working.

[0075] In this scheme, the first drive motor 5, the second drive motor 13, the third drive motor 24, the first electric cylinder 18 and the second electric cylinder 23 are all connected to the PLC through wires. At the same time, the PLC is also connected to the glue supply pump through wires via a liquid level sensor.

[0076] In this scheme, the PLC calculates the conveying speed of the rock wool board 44 in real time based on the speed feedback of the third drive motor 24, and sends the speed signal to the servo driver of the first drive motor 5 so that the reciprocating speed of the glue storage box 4 matches the conveying speed of the rock wool board, ensuring that the glue spraying trajectory is continuous and uniform.

[0077] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A process for the preparation of a polyurethane edged rock wool composite panel, characterized in that, Includes the following steps: Step 1: Place the steel sheet coils on the upper and lower uncoiling mechanisms and uncoil them simultaneously; Step 2: Coat the two rolls of thin metal sheet with film and trim the edges. At the same time, slit and rewind the trimmed edges. Step 3: Pass the two trimmed metal sheets through a forming machine or molding machine in sequence to prepare the preset concave and convex shapes; Step 4: After the rock wool boards are cut by the rock wool cutting device, they are stacked on the conveyor belt. The multiple neatly arranged rock wool boards, as well as the metal sheets placed above and below the rock wool boards, are conveyed to the gluing mechanism. Step 5: At the glue application mechanism, place the rock wool board between the two metal sheets, and then apply glue to the contact surface between the rock wool board and the two metal sheets through the glue application mechanism. Step 6: Simultaneously output the glued rock wool board and two metal sheets to the pressing mechanism to press them together to form a combined board; at the same time, extrude polyurethane mixture to seal the edges on both sides of the rock wool board and between the two metal sheets. Step 7: The assembled panels are preheated in the preheating system. Step 8: The preheated board enters the edge sealing and curing device, where the polyurethane mixture on both sides is extruded and heat-set to obtain a continuous board after curing. Step 9: The cured continuous sheet is cut into preset lengths using a band saw cutting system; Step 10: The palletizing system automatically stacks the items, and the packaging system completes the packaging. The glue application mechanism includes two support plates (9) arranged from top to bottom. A first drive motor (5) is installed on the top of the two support plates (9). A first ball screw (17) is installed on the movable end of the first drive motor (5). One end of the movable rod (6) is connected to the movable end of the first ball screw (17). The other end of the movable rod (6) extends to one side of the conveying mechanism and is connected to a glue storage box (4). The two glue storage boxes (4) are located above and below the conveying mechanism, respectively. Two glue spraying heads (3) with opposite orientations are installed on the surface of each of the two glue storage boxes (4), respectively used to spray glue onto the upper and lower surfaces of the rock wool board (44) and the opposite surfaces of the two metal sheets (42). A bracket (15) is installed between the two support plates (9). Support blocks (12) are installed on both symmetrical sides of the bracket (15). The bottom of the support plate (9) is placed on the top of the two support blocks (12). Guide rods (14) are installed at both ends of the support plate (9). The bottom end of the guide rod (14) passes through the top of the support block (12) and extends below it. A second drive motor (13) is installed on both symmetrical sides of the bracket (15). The movable end of the second drive motor (13) is connected to two worm gear transmission components (8) in sequence through a transmission shaft (10). The top end of the worm in the two worm gear transmission components (8) is installed at the bottom of the support plate (9). The conveying mechanism includes two symmetrically arranged fixed plates (22) located on one side of the bracket (15); a parallel movable plate (21) is provided between the two fixed plates (22), and a second electric cylinder (23) is installed at both ends of the two fixed plates (22). The movable end of the second electric cylinder (23) passes through the side of the fixed plate (22) and is installed on the side of the movable plate (21). Multiple rotating rollers (25) are installed on the side of the two movable plates (21) through mounting concave seats (30), and multiple protrusions (27) are installed along the arc surface of the rotating rollers (25). Along the length of the movable plate (21), the top of each of two adjacent rotating rollers (25) is connected to two coaxially fixed transmission gears (28), and a transmission gear chain (29) is connected between the transmission gears (28) on the two adjacent rotating rollers (25). Two rotating rollers (25) are located at the ends and are corresponding to each other along the width direction of the movable plate (21). One of the rotating rollers (25) has a guide gear (38) meshing with one side of a transmission gear (28) above it. The guide gear (38) is mounted on the surface of the movable plate (21) via a rotating shaft. The lower end of the other rotating roller (25) is connected to a third drive motor (24). A U-shaped ball screw mounting seat (41) is provided between the two corresponding rotating rollers (25). The two ends of a bidirectional spiral ball screw (36) are respectively mounted on the inner walls of the two sides of the ball screw mounting seat (41) via bearings. The spiral directions of the left and right sides of the bidirectional spiral ball screw (36) are opposite. Movable sleeves (26) are respectively provided on the spirals of the bidirectional spiral ball screw (36) with opposite spiral directions. A limiting groove (39) is opened on the lower surface of the ball screw mounting seat (41). A slider (40) is installed on the lower part of the two movable sleeves. The slider (40) extends into the limiting groove (39) and can slide along the limiting groove (39). A tensioning gear (37) is installed on each of the two movable sleeves (26) via a rotating shaft. A ring-shaped tensioning gear chain (35) is connected and fitted between the two tensioning gears (37), the guide gear (38), and the transmission gear (28) coaxially mounted with the third drive motor (24).

2. The preparation process of the polyurethane edge-banded rock wool composite board according to claim 1, characterized in that, Two pulley support plates (11) are installed on the top of the support plate (9), and a pulley (16) is installed between the two pulley support plates (11). The bottom of the movable rod (6) slides in contact with the arc surface of the pulley (16).

3. The preparation process of a polyurethane-sealed rock wool composite board according to claim 1, characterized in that, The top of the support plate (9) is equipped with a guide fixing frame (7), and the surface of the guide fixing frame (7) is provided with an installation groove (31). The first ball screw (17) is installed in the installation groove (31), and both ends of the first ball screw (17) are installed through bearings on both ends of the inner wall of the installation groove (31).

4. The preparation process of a polyurethane-sealed rock wool composite board according to claim 1, characterized in that, One end of the double-sided helical ball screw (36) passes through the ball screw mounting seat (41) and is mounted with a driven gear (32) through a rotating shaft; a rack (34) meshes with one side of the driven gear (32), one end of the rack (34) slides into the groove of one end of the guide groove (33), and the other end of the guide groove (33) and the other end of the rack (34) are respectively mounted on two movable plates (21) through brackets.

5. The preparation process of a polyurethane-sealed rock wool composite board according to claim 1, characterized in that, A first electric cylinder (18) is installed at the end of each of the two fixed plates (22), and a roller mounting plate (20) is installed between the movable ends of the two first electric cylinders (18). A leveling guide roller (19) is connected below the roller mounting plate (20).

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