Double-sided gluing equipment for synthetic leather

Abstract

The invention relates to the technical field of synthetic leather production, in particular to synthetic leather double-sided gluing equipment which comprises a rack, an upper glue roller set is mounted on the upper portion in the rack, an upper glue groove is mounted in the rack and located above the upper glue roller set, the upper glue groove comprises a first glue groove, and a lower glue roller set is mounted below the lower portion in the rack and located above the lower glue groove; a lower glue groove is formed in the position, below the lower glue roller set, in the rack and comprises a second glue groove. The glue storage device is designed, the lower glue roller set drives a glue solution in the glue storage device to be stirred in the gluing process, and it is guaranteed that glue components are uniform. And the glue below the glue barrel can be conveyed to the upper part through the conveying groove, so that the glue in the glue barrel is stirred more sufficiently, and the glue is prevented from precipitating and layering. By designing the partition plate, a temporary storage area is formed through the partition plate and the upper portion of the glue barrel, the up-down flowing state is formed, and meanwhile when the gluing groove lacks glue, glue liquid can be automatically supplemented to the gluing groove in time.

Description

Technical Field

[0001] This invention relates to the field of synthetic leather production technology, specifically to a double-sided adhesive coating device for synthetic leather. Background Technology

[0002] Synthetic leather is a plastic product that mimics the composition and structure of natural leather and can serve as a substitute. Synthetic leather typically consists of multiple layers, including a base fabric layer, a foam layer, and a top layer. During production, these layers are bonded together by applying adhesive to the base surface. In the adhesive application process, using double-sided adhesive equipment to simultaneously apply adhesive to both sides of the base layer can effectively improve the production efficiency of synthetic leather.

[0003] Existing double-sided adhesive coating equipment for synthetic leather suffers from insufficient stirring of the adhesive during the coating process, resulting in uneven adhesive application. Furthermore, the adhesive tends to separate under gravity, leading to reduced adhesive effectiveness. Therefore, a new double-sided adhesive coating equipment for synthetic leather is needed to address these issues. Summary of the Invention

[0004] To address the issue of not interfering with the normal operation of the belt conveyor when testing equipment is used, this invention provides a double-sided adhesive coating device for synthetic leather, thereby resolving the aforementioned problem.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A double-sided adhesive coating device for synthetic leather includes a frame, an upper adhesive roller assembly installed inside the frame, an adhesive trough installed inside the frame above the upper adhesive roller assembly, the adhesive trough including an adhesive trough one, a lower adhesive roller assembly installed inside the frame below the lower adhesive roller assembly, and a lower adhesive trough installed inside the frame below the lower adhesive roller assembly, the lower adhesive trough including an adhesive trough two. The lower glue roller assembly includes a fixed frame, which is fixedly installed inside the machine frame. A second glue-applying roller is rotatably connected inside the fixed frame. A glue roller shaft is fixedly connected inside the second glue-applying roller, and both ends of the glue roller shaft pass through the fixed frame. A glue storage device is fixedly installed on one side of the frame. The glue storage device includes a glue bucket. A connecting frame is fixedly connected to the outside of the glue bucket and is fixedly connected to the frame. A drive shaft is rotatably connected to one side of the inside of the glue bucket. One end of the drive shaft is fixedly connected to a glue roller shaft. The other end of the drive shaft is fixedly connected to a bevel gear one inside the glue bucket. A rotating shaft one is rotatably connected inside the glue bucket. A bevel gear two is fixedly connected to the rotating shaft one near the bevel gear one. The bevel gear two meshes with the bevel gear one. A stirring rod is fixedly connected to the outside of the rotating shaft one. A sprocket one is fixedly connected through the glue bucket at the lower end of the rotating shaft. A partition is fixedly connected to the upper part of the glue bucket. A glue supply pipe one is fixedly connected to one side of the upper end of the glue bucket. One end of the glue supply pipe one is located inside the glue bucket and bends through the partition. A glue inlet with an upward opening is provided on the glue supply pipe one near the bend. One end of the glue supply pipe one is located above the glue tank one. A glue supply pipe two is fixedly connected to one side of the lower end of the glue bucket. One end of the glue supply pipe two is inserted into the glue tank two. A conveying trough is fixedly connected to one side of the glue bucket. A connecting pipe 1 is connected between the lower end of the glue bucket and the conveying trough. A connecting pipe 2 is connected between the upper end of the conveying trough and the conveying trough. The horizontal height of the connecting pipe 2 is higher than the horizontal height of the glue inlet. A rotating shaft 2 is rotatably connected inside the conveying trough. A sprocket 2 is fixedly connected to the lower end of the rotating shaft 2 through the conveying trough. A chain is provided on the outside of the sprocket 2 and the outer side of the sprocket 1. A conveying auger is fixedly connected to the outer side of the rotating shaft 2 inside the conveying trough.

[0006] Preferably, the gluing roller assembly includes a movable frame, which is slidably connected to the internal frame of the machine frame. Telescopic rods are installed between the two sides of the movable frame and the upper end of the machine frame. A gluing roller is rotatably connected inside the movable frame.

[0007] Preferably, a mounting bracket is fixedly connected to both sides of the glue tank, and the lower end of the mounting bracket is fixedly installed above the movable frame. The upper end of the glue applicator is embedded in the bottom end of the glue tank, and a gap is formed between the glue applicator and the glue tank.

[0008] Preferably, an installation frame 2 is fixedly installed on the side of the glue tank 1 near the upper end of the glue bucket. A baffle 1 is slidably connected inside the installation frame 2. A float plate is slidably connected inside the glue tank 1. A connecting rod is connected between the float plate and the lower end of the baffle plate. One side of the baffle plate 1 is attached to one end of the glue filling pipe 1 to block the glue filling pipe 1.

[0009] Preferably, the lower glue tank includes a fixed plate, which is fixedly installed inside the frame. A second glue tank is fixedly connected above the fixed plate. A movable plate is slidably connected inside the second glue tank. A spring is installed between the movable plate and the fixed plate. A second baffle is fixedly connected to the side of the movable plate near the lower end of the glue tank. One side of the second baffle blocks one end of the second glue supply pipe. An outlet is opened on the second baffle below the second glue supply pipe.

[0010] Preferably, a scraper is fixedly connected to the upper end of the glue tank, the lower end of the glue coating roller is located inside the glue tank, and the scraper is located on both sides of the lower end of the glue coating roller.

[0011] Preferably, one end of the fixing plate extends to the outside of the frame, and a motor is fixedly installed above one end of the fixing plate, with the motor fixedly connected to one end of the rubber roller shaft.

[0012] Preferably, the glue bucket has a glue inlet on one side, and the end of the glue inlet connected to the glue bucket is located below the partition.

[0013] Preferably, the glue filling tube is inserted at an angle into the upper end of the glue tank, the horizontal height of the bend of the glue filling tube is higher than the outer end of the glue filling tube, the horizontal height of the bend of the glue filling tube is lower than the glue inlet port, and the stirring rod is located above the partition plate and its two ends do not contact the glue filling tube.

[0014] Preferably, a support plate is fixedly installed on the front and rear sides of the frame, and the upper end of the support plate is at the same horizontal height as the upper end of the second glue-applying roller.

[0015] Compared with existing technologies, 1. This invention incorporates a glue storage device, which uses a set of glue rollers to stir the glue inside the storage device during the glue application process, ensuring uniform glue composition.

[0016] 2. The present invention is designed with a conveying trough, which ensures that the glue at the bottom of the glue bucket is transported to the top, so that the glue inside the glue bucket is more thoroughly stirred and the glue is prevented from settling and separating.

[0017] 3. The present invention is designed with a partition, which forms a temporary storage area with the top of the glue tank, creating an up-and-down flow state. At the same time, when the glue tank is low on glue, it can automatically and promptly replenish the glue. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structure of the top rubber roller assembly in this invention; Figure 3 This is a schematic diagram of the lower rubber roller assembly in this invention; Figure 4 This is a schematic diagram of the adhesive storage device in this invention; Figure 5 This is a schematic diagram of the internal structure of the glue bucket in this invention.

[0019] Figure 6 This is a schematic diagram of the structure above the partition in the glue bucket of the present invention; Figure 7 This is a schematic diagram of the upper glue tank in this invention; Figure 8 This is a schematic diagram of the lower glue tank in this invention; Figure 9 For the present invention Figure 8 A magnified structural diagram of A in the diagram.

[0020] In the diagram: 1. Frame; 2. Glue roller assembly; 21. Movable frame; 22. Glue coating roller one; 23. Telescopic rod; 3. Glue tray; 31. Mounting bracket one; 32. Glue tray one; 33. Mounting bracket two; 34. Baffle one; 35. Floating plate; 36. Connecting rod; 4. Lower glue roller assembly; 41. Fixing frame; 42. Glue coating roller two; 43. Glue roller shaft; 5. Lower glue tank; 51. Fixed plate; 52. Glue tank two; 53. Movable plate; 54. Spring; 55. Baffle two; 551. Outlet; 56. Scraper; 6. Electric motor; 7. Glue storage device; 71. Glue bucket; 72. Conveying trough; 73. Connecting frame; 74. Drive shaft; 741. Bevel gear one; 75. Glue inlet; 76. Glue filling pipe one; 761. Glue inlet; 77. Glue filling pipe two; 78. Partition plate; 711. Rotating shaft one; 712. Bevel gear two; 713. Stirring rod; 714. Sprocket one; 715. Connecting pipe one; 721. Rotating shaft two; 722. Sprocket two; 723. Conveying auger; 724. Connecting pipe two; 8. Pallet. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0022] Example: Please refer to Figure 1-9 The double-sided coating equipment for synthetic leather shown includes a frame 1, an upper glue roller group 2 installed inside the frame 1, an upper glue trough 3 installed inside the frame 1 above the upper glue roller group 2, the upper glue trough 3 includes glue trough 32, a lower glue roller group 4 installed inside the frame 1 below the lower glue roller group 4, and a lower glue trough 5 installed inside the frame 1 below the lower glue roller group 4, the lower glue trough 5 includes glue trough 52. The lower glue roller assembly 4 includes a fixed frame 41, which is fixedly installed inside the machine frame 1. A second glue roller 42 is rotatably connected inside the fixed frame 41, and a glue roller shaft 43 is fixedly connected inside the second glue roller 42. Both ends of the glue roller shaft 43 pass through the fixed frame 41. A glue storage device 7 is fixedly installed on one side of the frame 1. The glue storage device 7 includes a glue tank 71. A connecting frame 73 is fixedly connected to the outside of the glue tank 71 and is fixedly connected to the frame 1. A drive shaft 74 is rotatably connected to one side of the glue tank 71. One end of the drive shaft 74 is fixedly connected to a glue roller shaft 43. The other end of the drive shaft 74 is located inside the glue tank 71 and is fixedly connected to a bevel gear 741. A rotating shaft 711 is rotatably connected inside the glue tank 71. A bevel gear 712 is fixedly connected to the rotating shaft 711 near the bevel gear 741. The bevel gear 712 meshes with the bevel gear 741. A stirring rod 713 is fixedly connected to the outside of the rotating shaft 711. A sprocket 714 is fixedly connected to the lower end of the rotating shaft 711 through the glue tank 71. A partition 78 is fixedly connected to the upper part of the glue tank 71. A glue filling tube 76 is fixedly connected to one side of the upper end of the glue tank 71. One end of the glue filling tube 76 is located inside the glue tank 71 and bends through the partition 78. A glue inlet 761 with an upward opening is provided on the glue filling tube 76 near the bend. One end of the glue filling tube 76 is located above the glue tank 32. A glue filling tube 77 is fixedly connected to one side of the lower end of the glue tank 71. One end of the glue filling tube 77 is inserted into the glue tank 52. A conveying trough 72 is fixedly connected to one side of the glue bucket 71. A connecting pipe 715 connects the lower end of the glue bucket 71 to the conveying trough 72, and a connecting pipe 724 connects the upper end of the conveying trough 72 to the conveying trough 72. The horizontal height of the connecting pipe 724 is higher than that of the glue inlet 761. A rotating shaft 721 is rotatably connected inside the conveying trough 72. A sprocket 722 is fixedly connected to the lower end of the rotating shaft 721 through the conveying trough 72. A chain is provided on the outside of the sprocket 722 and the sprocket 714. A conveying auger 723 is fixedly connected to the outside of the rotating shaft 721 inside the conveying trough 72. The frame 1 constructs symmetrical glue application stations to achieve simultaneous double-sided glue application on synthetic leather substrates. The overall equipment has a "sandwich" layout: the upper layer is the upper glue roller group 2 and its supporting glue supply system, the lower layer is the lower glue roller group 4 and its supporting glue supply system, and the middle is the synthetic leather substrate conveying channel.

[0023] The frame 1 adopts a high-strength steel welded frame structure to provide overall support.

[0024] The lower rubber roller assembly 4 adopts a fixed rigid design, including: Fixed frame 41: Fixedly installed inside the lower part of the frame 1 to provide rigid support; second glue-applying roller 42: Rotatably connected inside the fixed frame 41 as the lower glue-applying main roller; glue roller shaft 43: Fixedly connected inside the second glue-applying roller 42, with both ends passing through the fixed frame 41, one end connected to the drive device, and the other end fixedly connected to the drive shaft 74 of the glue storage device 7.

[0025] Drive method: The output shaft of the drive unit is fixedly connected to one end of the glue roller shaft 43, driving the glue coating roller 42 to rotate. The rotation direction of the glue coating roller 42 matches the substrate conveying direction, realizing reverse or unidirectional glue coating.

[0026] The adhesive storage device 7 is installed on one side of the frame 1, serving as the centralized adhesive supply center for the upper and lower adhesive application stations, and includes: Glue Bucket 71: Main glue storage container, made of stainless steel, capacity designed according to production needs (usually 50-200L). Connecting Frame 73: Fixedly connected to the outside of Glue Bucket 71 and fixedly connected to Frame 1, providing support. Drive Shaft 74: Rotatably connected to one side inside Glue Bucket 71, one end fixedly connected to one end of Glue Roller Shaft 43, the other end located inside Glue Bucket 71 and fixedly connected to Bevel Gear 1 741. Bevel Gear 1 741 and Bevel Gear 2 712: Form a 90° steering transmission pair, converting horizontal rotation into vertical rotation. Moving Shaft 1 711: Rotatably connected to the inside of Glue Bucket 71, the upper end fixedly connected to Bevel Gear 2 712, the lower end passing through Glue Bucket 71 and fixedly connected to Sprocket 1 714. Stirring Rod 713: Fixedly connected to the outside of Moving Shaft 1 711.

[0027] Power transmission path: coating roller 2 42 → roller shaft 43 → drive shaft 74 → bevel gear 1 741 → bevel gear 2 712 → rotating shaft 1 711 → stirring rod 713.

[0028] Stirring action: When the coating roller 42 rotates, it drives the stirring rod 713 to rotate synchronously through the aforementioned transmission chain, continuously stirring the adhesive in the glue tank 71. The stirring speed is automatically adjusted according to the rotation speed of the coating roller to ensure that the adhesive is always in a uniform suspension state, preventing filler sedimentation and stratification.

[0029] Conveying trough 72: Fixedly connected to one side of glue tank 71, forming a glue circulation loop; Connecting pipe 1 715: Connects the lower end of glue tank 71 to the lower end of conveying trough 72, for glue outflow; Connecting pipe 2 724: Connects the upper end of conveying trough 72 to the upper end of glue tank 71, with a horizontal height higher than the glue inlet 761, for glue return; Partition 78: Glue temporary storage area, allowing glue to be discharged through 76.

[0030] Conveying auger mechanism: Rotating shaft 2 721: Rotatably connected inside the conveying trough 72, with its lower end passing through the conveying trough 72 and fixedly connected to sprocket 2 722. Sprocket 2 722 and sprocket 1 714: Connected by chain drive to achieve synchronous rotation. Conveying auger 723: Fixedly connected outside the rotating shaft 2 721 and located inside the conveying trough 72.

[0031] Circulation Principle: When the stirring rod 713 rotates, it drives the rotating shaft 721 to rotate via sprocket 714, chain, and sprocket 722. The conveying auger 723 draws the glue from the bottom of the glue bucket 71 into the conveying trough 72 through connecting pipe 715, then lifts it up to the height of connecting pipe 724, and returns it to the upper part of the glue bucket 71 through connecting pipe 724. This circulation process achieves forced convection of the glue, ensuring that the temperature and concentration of the glue in the glue bucket are uniform.

[0032] In this embodiment, specific references Figure 1 and Figure 2 Specifically: the gluing roller assembly 2 includes a movable frame 21, which is slidably connected to the internal frame 1. Telescopic rods 23 are installed between the two sides of the movable frame 21 and the upper end of the frame 1. A first gluing roller 22 is rotatably connected inside the movable frame 21. The gluing roller assembly 2 adopts an adjustable floating design, including: Movable frame 21: It is connected to the inside of the frame 1 on both sides and slides vertically. It achieves precise lifting and lowering movement through the guide rail. Glue roller 22: It is rotatably connected to the inside of the movable frame 21. The roller surface can be a textured roller or a smooth roller structure, which can be selected according to the glue coating process requirements. Telescopic rod 23: It is installed between the two sides of the movable frame 21 and the upper end of the frame 1. It is pneumatically or hydraulically driven and is used to adjust the contact pressure between the glue roller 22 and the substrate.

[0033] Adjustment principle: By extending and retracting the telescopic rod 23, the movable frame 21 drives the coating roller 22 to move up and down, thereby adjusting the contact pressure with the upper surface of the substrate. This design can adapt to synthetic leather substrates of different thicknesses (0.5-5mm) and compensate for gap changes caused by roller wear.

[0034] In this embodiment, specific references Figure 2 and Figure 7 Specifically: Mounting brackets 31 are fixedly connected to both sides of the glue tank 32. The lower end of the mounting brackets 31 is fixedly mounted above the movable frame 21. The upper end of the glue applicator roller 22 is embedded in the bottom end of the glue tank 32, forming a gap between the glue applicator roller 22 and the glue tank 32. The glue tank 3 includes: Glue tank 32: Used to store the glue supplied by the upward coating roller 22. Mounting frame 31: Fixedly connected to both sides of glue tank 32, with its lower end fixedly mounted above the movable frame 21 to achieve synchronous lifting and lowering of glue tank 32 and coating roller 22. Clearance fit: The upper end of coating roller 22 is embedded in the bottom end of glue tank 32, forming a precise clearance (usually 0.05-0.2mm) between them to control the amount of glue carried out.

[0035] In this embodiment, specific references Figure 4 and Figure 5Specifically: A mounting bracket 33 is fixedly installed on the side of the glue tank 32 near the upper end of the glue container 71. A baffle 34 is horizontally slidably connected inside the mounting bracket 33. A float 35 is vertically slidably connected inside the glue tank 32. A connecting rod 36 connects the float 35 and the lower end of the baffle 34. One side of the baffle 34 is attached to one end of the glue filling pipe 76, blocking the pipe. The automatic glue filling and liquid level control mechanism includes: Mounting bracket 2 33: fixedly installed on the side of glue tank 1 32 near the upper end of glue bucket 71; baffle 1 34: horizontally slidably connected to the inside of mounting bracket 2 33, and can move horizontally back and forth; float 35: vertically slidably connected to the inside of glue tank 1 32, floating on the surface of the glue liquid; connecting rod 36: connects the float 35 and the lower end of baffle 1 34 to form a lever-type linkage mechanism.

[0036] Working principle: When the glue tank 32 is full of glue, the float 35 rises, pushing the baffle 34 laterally via the connecting rod 36. This causes one side of the baffle 34 to contact the port of the glue supply pipe 76, blocking the pipe and stopping glue supply. When the glue level drops due to consumption, the float 35 sinks, and the baffle 34 moves in the opposite direction, opening the port of the glue supply pipe 76, allowing glue to be automatically replenished from the glue storage device 7. This mechanism achieves automatic and constant control of the glue tank level, ensuring a stable glue intake by the coating roller.

[0037] In this embodiment, specific references Figure 2 , 8 and Figure 9 Specifically: the lower glue tank 5 includes a fixed plate 51, which is fixedly installed inside the frame 1. A second glue tank 52 is fixedly connected above the fixed plate 51. A movable plate 53 is slidably connected inside the second glue tank 52. A spring 54 is installed between the movable plate 53 and the fixed plate 51. A second baffle 55 is fixedly connected to the movable plate 53 near the lower end of the glue tank 71. One side of the second baffle 55 blocks one end of the second glue pipe 77. An outlet 551 is opened on the second baffle 55 below the second glue pipe 77. The lower glue tank 5 includes: Fixed plate 51: Fixedly installed inside the frame 1; glue tank 2 52: Fixedly connected above the fixed plate 51, storing the glue supplied by the downward glue roller 2 42; movable plate 53: Slidingly connected to the inside of the glue tank 2 52, and can float in the vertical direction; spring 54: Installed between the movable plate 53 and the fixed plate 51, providing elastic support.

[0038] Automatic glue replenishment and liquid level control mechanism: Baffle 2 55: Fixedly connected to the movable plate 53 on the side near the lower end of the glue tank 71. Outlet 551: Opened on baffle 2 55, located below glue filling tube 2 77.

[0039] Working principle: When the glue tank 52 is full of glue, the movable plate 53 floats upward due to buoyancy, compressing the spring 54. The baffle 55 rises and blocks the port of the glue supply pipe 77, stopping glue supply. When the glue is consumed, the movable plate 53 sinks, the baffle 55 descends, opening the port of the glue supply pipe 77. At the same time, the outlet 551 connects to the inside of the glue tank 52, and the glue is automatically replenished from the glue storage device 7. The elastic coefficient of the spring 54 is designed according to the specific gravity of the glue and the required liquid level, ensuring that the liquid level fluctuation is controlled within ±5mm.

[0040] In this embodiment, specific references Figure 8 Specifically: A scraper 56 is fixedly connected to the upper end of glue tank 2 52, and the lower end of glue coating roller 2 42 is located inside glue tank 2 52. The scraper 56 is located on both sides of the lower end of glue coating roller 2 42. Among them, scraper 56: fixedly connected to the upper end of glue tank 2 52 and located on both sides of the lower end of glue coating roller 2 42, is used to scrape off excess glue from the surface of glue coating roller and control the glue coating thickness.

[0041] In this embodiment, specific references Figure 2 and Figure 8 Specifically: one end of the fixing plate 51 extends to the outside of the frame 1, and a motor 6 is fixedly installed on the upper part of one end of the fixing plate 51. The motor 6 is fixedly connected to one end of the glue roller shaft 43. The motor 6 is fixedly installed on the upper part of one end of the fixing plate 51, and its output shaft is fixedly connected to one end of the glue roller shaft 43, driving the second glue-applying roller 42 to rotate. The rotation direction of the second glue-applying roller 42 matches the substrate conveying direction, achieving reverse or unidirectional glue application.

[0042] In this embodiment, specific references Figure 4 and Figure 5 Specifically: A glue inlet 75 is provided on one side of the glue container 71, and the end of the glue inlet 75 connected to the glue container 71 is located below the partition 78. The glue inlet 75 is provided with a closed cap, and glue is added into the glue container 71 through the glue inlet 75.

[0043] In this embodiment, specific references Figure 5 and Figure 6 Specifically: the glue filling tube 76 is inserted at an angle into the upper part of the glue container 71. The horizontal height of the bend in the glue filling tube 76 is higher than the outer end of the glue filling tube 76, and the horizontal height of the bend in the glue filling tube 76 is lower than the port of the glue inlet 761. The stirring rod 713 is located above the partition plate 78, and its two ends do not contact the glue filling tube 76. When the glue above the partition plate 78 enters the glue filling tube 76 through the glue inlet 761, it preferentially flows to the outer end. When the outer end is blocked, the glue flows downwards after being bent at the bend, and the stirring rod 713 is located above the partition plate 78, with its two ends not contacting the glue filling tube 76 to avoid interference.

[0044] In this embodiment, specific references Figure 1 and Figure 2Specifically: Support plates 8 are fixedly installed on the front and rear sides of the frame 1, with the upper end of the support plates 8 at the same horizontal level as the upper end of the second glue-coating roller 42. The support plates 8 are fixedly installed on both the front and rear sides of the frame 1, with the upper end of the support plates 8 at the same horizontal level as the upper end of the second glue-coating roller 42, to support and guide the synthetic leather substrate smoothly into the double-sided glue-coating area.

[0045] Workflow Preparation phase: Glue injection: Inject the prepared glue into the glue container 71 through the glue injection port 75; Start motor 6: drive the glue coating roller 42 to rotate, and at the same time drive the stirring rod 713 and the conveying auger 723 to work; Adjust the gluing roller: Adjust the height of the first gluing roller 22 by using the telescopic rod 23 so that it is located at the upper end of the second gluing roller 42; Liquid level balance: The adhesive is automatically replenished to adhesive tank 1 32 and adhesive tank 2 52, and the liquid level control mechanism automatically adjusts to the set height.

[0046] Glue application stage: Substrate feeding: The synthetic leather substrate is guided from the previous process into the double-sided adhesive coating area via pallet 8.

[0047] Double-sided adhesive: Top surface: The glue-applying roller 22 takes glue from the glue tank 32 and evenly applies the glue to the top surface of the substrate; Lower surface: The second glue roller 42 takes glue from the second glue tank 52, and after being scraped evenly by the scraper 56, it is applied to the lower surface of the substrate; Synchronous adjustment: The pressure of applying glue is adjusted in real time through the telescopic rod 23 according to the thickness of the substrate to ensure that the amount of glue applied on both sides is consistent; Continuous glue supply: As the glue application proceeds, the glue tank level drops, and the automatic glue replenishment mechanism is activated to replenish glue from the glue tank 71. Circulating stirring: During the glue application process, the stirring rod 713 continuously stirs, and the conveying auger 723 forces circulation to ensure that the glue is uniform.

[0048] The motor 6 and telescopic rod 23 used in this invention are both existing known electrical devices, and both can be purchased and used directly on the market. Their structure, circuit and control principle are all existing known technologies. Therefore, the structure, circuit and control principle of the motor 6 and telescopic rod 23 will not be described in detail here.

[0049] All standard parts used in this application can be purchased from the market. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art and are also general components, which are common knowledge in this field.

[0050] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A double-sided adhesive coating device for synthetic leather, comprising a frame (1), characterized in that: The upper part of the frame (1) is equipped with a glue roller assembly (2), and the upper part of the frame (1) is equipped with a glue groove (3) above the glue roller assembly (2). The glue groove (3) includes a glue groove one (32). The lower part of the frame (1) is equipped with a glue roller assembly (4), and the lower part of the frame (1) is equipped with a glue groove (5) below the glue roller assembly (4). The glue groove (5) includes a glue groove two (52). The lower glue roller assembly (4) includes a fixed frame (41), which is fixedly installed inside the frame (1). A second glue roller (42) is rotatably connected inside the fixed frame (41), and a glue roller shaft (43) is fixedly connected inside the second glue roller (42). Both ends of the glue roller shaft (43) pass through the fixed frame (41). A glue storage device (7) is fixedly installed on one side of the frame (1). The glue storage device (7) includes a glue tank (71). A connecting frame (73) is fixedly connected to the outside of the glue tank (71). The connecting frame (73) is fixedly connected to the frame (1). A drive shaft (74) is rotatably connected to one side of the inside of the glue tank (71). One end of the drive shaft (74) is fixedly connected to the glue roller shaft (43). The other end of the drive shaft (74) is fixedly connected to a bevel gear (741) inside the glue tank (71). A rotating shaft (711) is rotatably connected inside the glue tank (71). A bevel gear (712) is fixedly connected to the rotating shaft (711) near the bevel gear (741). The bevel gear (712) and the bevel gear (741) are connected to each other. The rotating shaft (711) is fixedly connected to the outside of the rotating shaft (713). The lower end of the rotating shaft (711) passes through the glue bucket (71) and is fixedly connected to the sprocket (714). The upper part of the glue bucket (71) is fixedly connected to the partition (78). The upper side of the glue bucket (71) is fixedly connected to the glue tube (76). One end of the glue tube (76) is located inside the glue bucket (71) and bends through the partition (78). The glue tube (76) has an upward-opening glue inlet (761) near the bend. One end of the glue tube (76) is located above the glue tank (32). The lower side of the glue bucket (71) is fixedly connected to the glue tube (77). One end of the glue tube (77) is inserted into the glue tank (52). A conveying trough (72) is fixedly connected to one side of the glue bucket (71). A connecting pipe (715) is connected between the lower end of the glue bucket (71) and the conveying trough (72). A connecting pipe (724) is connected between the upper end of the conveying trough (72) and the conveying trough (72). The horizontal height of the connecting pipe (724) is higher than that of the glue inlet (761). A rotating shaft (721) is rotatably connected inside the conveying trough (72). A sprocket (722) is fixedly connected to the lower end of the rotating shaft (721) through the conveying trough (72). A chain is provided on the outside of the sprocket (722) and the sprocket (714). A conveying auger (723) is fixedly connected to the outside of the rotating shaft (721) inside the conveying trough (72).

2. The double-sided adhesive coating equipment for synthetic leather according to claim 1, characterized in that: The glue roller assembly (2) includes a movable frame (21), which is slidably connected to the internal frame (1) of the movable frame (21). Telescopic rods (23) are installed between the two sides of the movable frame (21) and the upper end of the frame (1). A glue roller (22) is rotatably connected inside the movable frame (21).

3. The double-sided adhesive coating equipment for synthetic leather according to claim 2, characterized in that: The glue tank (32) is fixedly connected to the two sides of the mounting frame (31). The lower end of the mounting frame (31) is fixedly installed above the movable frame (21). The upper end of the glue roller (22) is embedded in the bottom end of the glue tank (32), and a gap is formed between the glue roller (22) and the glue tank (32).

4. The double-sided adhesive coating equipment for synthetic leather according to claim 3, characterized in that: The glue tank (32) is fixedly installed with a mounting bracket (33) on the side near the upper end of the glue bucket (71). The mounting bracket (33) is horizontally slidably connected with a baffle (34). The glue tank (32) is vertically slidably connected with a float (35). A connecting rod (36) is connected between the float (35) and the lower end of the baffle (34). One side of the baffle (34) is attached to one end of the glue filling tube (76) to block the glue filling tube (76).

5. The double-sided adhesive coating equipment for synthetic leather according to claim 1, characterized in that: The lower glue tank (5) includes a fixed plate (51), which is fixedly installed inside the frame (1). A glue tank two (52) is fixedly connected above the fixed plate (51). A movable plate (53) is slidably connected inside the glue tank two (52). A spring (54) is installed between the movable plate (53) and the fixed plate (51). A baffle two (55) is fixedly connected on the movable plate (53) near the lower end of the glue tank (71). One side of the baffle two (55) blocks one end of the glue filling pipe two (77). An outlet (551) is opened on the baffle two (55) below the glue filling pipe two (77).

6. The double-sided adhesive coating equipment for synthetic leather according to claim 5, characterized in that: The upper end of the glue tank 2 (52) is fixedly connected to a scraper (56), the lower end of the glue coating roller 2 (42) is located inside the glue tank 2 (52), and the scraper (56) is located on both sides of the lower end of the glue coating roller 2 (42).

7. The double-sided adhesive coating equipment for synthetic leather according to claim 5, characterized in that: One end of the fixing plate (51) extends to the outside of the frame (1), and a motor (6) is fixedly installed on the top of one end of the fixing plate (51). The motor (6) is fixedly connected to one end of the rubber roller shaft (43).

8. The double-sided adhesive coating equipment for synthetic leather according to claim 1, characterized in that: The glue bucket (71) has a glue inlet (75) on one side, and the glue inlet (75) is connected to the glue bucket (71) at one end, which is located below the partition (78).

9. The double-sided adhesive coating equipment for synthetic leather according to claim 1, characterized in that: The glue filling tube (76) is inserted at an angle into the upper end of the glue tank (71). The horizontal height of the bend of the glue filling tube (76) is higher than the outer end of the glue filling tube (76), and the horizontal height of the bend of the glue filling tube (76) is lower than the port of the glue inlet (761). The stirring rod (713) is located above the partition plate (78) and its two ends do not contact the glue filling tube (76).

10. The double-sided adhesive coating equipment for synthetic leather according to claim 1, characterized in that: The frame (1) is fixedly installed with a support plate (8) on the front and rear sides. The upper end of the support plate (8) is at the same level as the upper end of the glue-coating roller (42).

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