A glue applicator for timber.

Abstract

This utility model discloses a glue-applying device for timber, including a glue-applying table and a conveyor belt positioned in the center of the table. A variable-speed motor is fixedly connected to one end of the glue-applying table. A mounting bracket is connected above the glue-applying table, and a dust removal mechanism and a cylinder are mounted on the bracket. A glue-applying roller and a glue-dispensing mechanism are fixedly connected to the piston output end of the cylinder. The glue-dispensing mechanism includes a pressure glue storage tank and multiple glue-dispensing tubes evenly connected to the bottom of the pressure glue storage tank. The bottom of each glue-dispensing tube is conical and has a glue outlet. A matching ball bearing is installed inside the outlet, and a miniature spring is located above the ball bearing. A limiting and sealing ring protrudes inward at the bottom of the outlet, and a vertical glue-guiding groove is provided on the inner wall of the outlet. This design controls the glue-dispensing action by using multiple glue-dispensing tubes connected to the pressure glue storage tank and utilizing the cooperation of the ball bearings and springs. The thickness of the adhesive coating on the timber is controlled by adjusting the variable-speed motor of the conveyor belt.

Description

Technical Field

[0001] This utility model relates to the technical field of wood gluing equipment, and in particular to a gluing device for wood. Background Technology

[0002] Applying adhesive to the core of timber is a core process in wood processing, primarily used for splicing timber (such as finger joints and planar joints) to create larger or more stable structural materials. Its function extends beyond mere bonding; it comprehensively enhances material properties. After application, pressure curing allows the adhesive to penetrate the wood fibers, creating a "glue nail effect" that binds the dispersed timber blocks together, significantly improving bending and tensile strength. Timber often contains knots, cracks, or rotten parts; during splicing, these defects can be removed, allowing smaller pieces to be joined into larger, high-quality pieces, improving resource utilization. Furthermore, wood naturally exhibits anisotropy and is susceptible to warping due to humidity. The adhesive layer inhibits moisture penetration and, through staggered splicing (such as combining vertical finger joints with planar joints), reduces shrinkage differences, significantly improving dimensional stability.

[0003] In existing technologies, the main methods for applying adhesive to timber cores are dip coating and roller coating. Dip coating involves immersing the timber core in a glue tank, allowing the adhesive to evenly cover the surface, then removing it to dry or proceed to the next processing step. This method uses a large amount of adhesive, easily leading to waste, and requires subsequent steps such as evenly applying or scraping off excess adhesive. Roller coating uses a roller to evenly apply the adhesive to the wood surface, with the roller rolling in the glue tank. While this method provides even coverage, excess adhesive often adheres to the roller, easily dripping during application and causing waste. Furthermore, it is difficult to control the adhesive thickness on the timber. In addition, the surface of the timber core easily adheres to sawdust and dust; failure to clean it before applying adhesive will affect the bonding strength and effectiveness of the adhesive. Utility Model Content

[0004] This utility model addresses the technical problems of excessive and wasteful adhesive during the application of glue to timber cores and the difficulty in controlling the uniformity of the coating thickness. It provides a glue application device for timber, including a glue application table and a conveyor belt disposed in the center of the glue application table. One end of the glue application table is fixedly connected to a variable speed motor, and the output end of the variable speed motor is fixedly connected to the shaft of the drive roller of the conveyor belt.

[0005] A mounting bracket is connected above the glue application table, and a dust removal mechanism and a cylinder are mounted on the mounting bracket.

[0006] The dust removal mechanism includes a roller brush and a micro motor connected to one side of the roller brush. The output end of the micro motor is fixedly connected to the rotating shaft of the roller brush.

[0007] A connecting plate is fixedly connected to the piston output end of the cylinder, and a glue-applying roller and a glue-dispensing mechanism are fixedly connected to the bottom of the connecting plate. The glue-dispensing mechanism includes a pressure glue storage tank and multiple glue-dispensing pipes uniformly connected to the bottom of the pressure glue storage tank.

[0008] The dispensing tube has a guide hole at the top center, which is connected to the pressure storage tank. The bottom of the dispensing tube is conical and has a dispensing hole. A matching ball bearing is installed in the dispensing hole. A miniature spring is installed above the ball bearing. The top of the miniature spring is fixedly connected to the top of the dispensing tube. The bottom of the dispensing hole has an inwardly protruding limiting and sealing ring to prevent the ball bearing from falling out of the dispensing hole. A vertical guide groove is provided on the inner wall of the dispensing hole.

[0009] Preferably, in the above technical solution, the dust removal mechanism further includes a brush frame installed above the roller brush, a telescopic sleeve is fixedly connected above the brush frame, the top end of the telescopic sleeve is fixedly connected to the mounting bracket, and a spring is sleeved on the outer periphery of the telescopic sleeve.

[0010] Preferably, in the above technical solution, the conveyor belt has multiple transmission support rollers parallel to the drive roller inside.

[0011] Preferably, in the above technical solution, a rotating crank arm and a mounting base for fixing the rotating crank arm are provided between the glue-applying roller and the connecting plate.

[0012] Preferably, in the above technical solution, the mounting base is fixedly connected to the bottom of the connecting plate, and the middle section of the rotating arm is provided with an adjusting joint.

[0013] Preferably, in the above technical solution, the cylinder is fitted with a clamp on its outer periphery and is fixedly connected to the mounting bracket by the clamp.

[0014] Preferably, in the above technical solution, a liquid level observation window is provided on one side of the pressure storage tank.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] This invention utilizes multiple glue-dispensing tubes connected to a pressure glue storage tank. Each tube dispenses glue independently, making it suitable for applying glue to timber of various widths. The glue-dispensing tubes employ a combination of ball bearings and springs to control the glue dispensing action. When the timber squeezes the ball bearings upwards, the tube begins dispensing glue. After the timber separates from the tube, the spring inside the tube controls the ball bearings to close the tube. By adjusting the variable-speed motor of the conveyor belt, the contact time between the timber and the glue-dispensing tube is controlled, preventing excessive glue waste and thus controlling the thickness of the glue coating on the timber.

[0017] This invention utilizes a dust removal mechanism installed before the glue applicator. A micro-motor drives a roller brush to clean sawdust and dust from the surface of the timber, preventing these particles from affecting the adhesive strength after gluing. The telescopic sleeve and spring at the top of the dust removal mechanism can assist in precise dust removal based on the thickness of the timber, making it suitable for gluing timber of varying thicknesses.

[0018] The cylinder installed above the glue-applying roller and the glue-dispensing mechanism in this invention can adjust the distance between the glue-applying roller and the glue-dispensing mechanism according to the thickness of the wood, ensuring that the wood can stably contact the glue-dispensing tube of the glue-dispensing mechanism, squeezing the ball bearings to dispense glue. At the same time, it ensures that the glue-applying roller stably contacts the adhesive on the wood and applies it evenly to a certain thickness. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a gluing device for timber according to the present invention;

[0020] Figure 2 This is a schematic diagram of the glue storage bin and glue dispensing pipe of a glue applicator for timber according to this utility model.

[0021] Figure 3 for Figure 1 Enlarged view of the telescopic sleeve and spring;

[0022] Figure 4 This is a schematic diagram of the internal structure of the glue dispensing tube in a glue applicator for timber according to this utility model. Figure 1 ;

[0023] Figure 5 This is a schematic diagram of the internal structure of the glue dispensing tube in a glue applicator for timber according to this utility model. Figure 2 ;

[0024] Figure 6 This is a side view of the internal structure of the glue-dispensing tube opening in a glue-applying device for timber according to this utility model.

[0025] Explanation of key figure labels:

[0026] 1-Glue application table, 2-Variable speed adjustable motor, 3-Mounting bracket, 4-Dust removal mechanism, 5-Cylinder, 6-Glue application roller, 8-Glue dispensing mechanism, 11-Drive roller, 12-Transmission support roller, 13-Conveyor belt, 41-Roller brush, 42-Micro motor, 44-Brush holder, 45-Telescopic sleeve, 46-Spring, 51-Connecting plate, 52-Clamp, 61-Rotating crank arm, 62-Mounting base, 63-Adjusting joint, 81-Pressure glue storage tank, 82-Glue dispensing tube, 83-Liquid level observation window, 821-Glue outlet, 822-Ball bearing, 823-Micro spring, 824-Glue guide hole, 825-Glue guide groove, 8211-Limiting and closing ring. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] like Figures 1-6As shown, this utility model discloses a gluing device for timber, comprising a gluing table 1 and a conveyor belt 13 disposed in the center of the gluing table 1. A variable speed motor 2 is fixedly connected to one end of the gluing table 1, and the output end of the variable speed motor 2 is fixedly connected to the shaft of the drive roller 11 of the conveyor belt 13. The conveyor belt 13 is driven by the variable speed motor 2, allowing the conveyor belt 13 to adjust its conveying speed under the drive of the variable speed motor 2. A mounting bracket 3 is connected above the gluing table 1, and a dust removal mechanism 4 and a cylinder 5 are mounted on the mounting bracket 3. A clamp 52 is fitted around the outer periphery of the cylinder 5, and the cylinder 5 is fixedly connected to the mounting bracket 3 via the clamp 52. The dust removal mechanism 4 includes a roller brush 41 and a micro motor 42 connected to one side of the roller brush 41, and the output end of the micro motor 42 is fixedly connected to the shaft of the roller brush 41. The micro motor 42 ensures that it can drive the roller brush 41 to rotate and sweep away dust and debris. The dust removal mechanism 4 also includes a brush holder 44 installed above the roller brush 41. A telescopic sleeve 45 is fixedly connected to the top of the brush holder 44. The top end of the telescopic sleeve 45 is fixedly connected to the mounting bracket 3. A spring 46 is fitted around the outer periphery of the telescopic sleeve 45. The roller brush 41 is designed to be telescopic, which ensures that the flexible bristles on the roller brush 41 can stably contact wood of different thicknesses and can thoroughly clean the dust and wood chips on the wood. The piston output end of the cylinder 5 is fixedly connected to a connecting plate 51. The bottom of the connecting plate 51 is fixedly connected to a glue-applying roller 6 and a glue-dispensing mechanism 8. The glue-dispensing mechanism 8 includes a pressure glue storage tank 81 and multiple glue-dispensing pipes 82 evenly connected to the bottom of the pressure glue storage tank 81. Multiple glue-dispensing tubes 82 should be designed side by side, and the width of the timber determines the number of glue-dispensing tubes 82 operating simultaneously. A glue-guiding hole 824 is provided at the center of the top of each glue-dispensing tube 82, and it is connected to the pressure glue storage chamber 81. The bottom of each glue-dispensing tube 82 is conical and has a glue outlet hole 821. A matching ball bearing 822 is provided inside the glue outlet hole 821. A miniature spring 823 is provided above the ball bearing 822, and the top of the miniature spring 823 is fixedly connected to the top of the glue-dispensing tube 82. An inwardly protruding limiting and sealing ring 8211 is provided at the bottom of the glue outlet hole 821 to prevent the ball bearing 822 from falling out of the glue outlet hole 821. A vertical glue-guiding groove 825 is provided on the inner wall of the glue outlet hole 821.When the timber comes into contact with the glue discharge tube 82 as it moves along the conveyor belt 13, the thickness of the timber presses the ball bearing 822 upwards, causing the ball bearing 822 to move upwards and disengage from the limiting and closing ring 8211. At this time, the adhesive in the glue discharge tube 82, under the action of the pressure storage bin 81, drips onto the timber along the guide groove 825 on the inner wall of the glue outlet 821. The timber continues to move forward with the conveyor belt 13, and the ball bearing 822 rolls on the timber, with adhesive continuously dripping onto the upper surface of the timber. When the other end of the timber disengages from the glue discharge tube 82, the ball bearing 822, under the elastic force of the miniature spring 823, resumes close contact with the limiting and closing ring 8211, sealing the adhesive from flowing out of the glue outlet 821. This prevents glue from overflowing after the timber has been glued, thus preventing adhesive waste and avoiding the impact of adhesive dripping onto the conveyor belt 13.

[0029] In this embodiment, the conveyor belt 13 has multiple transmission support rollers 12 parallel to the drive roller 11 inside. The transmission support rollers 12 in the middle section of the conveyor belt 13 can provide support for the wood on the conveyor belt 13 during dust removal, glue application, and glue coating, preventing the conveyor belt 13 from being stretched and deformed by external forces during these processes, thus affecting the working effect of the wood. A rotating arm 61 and a mounting seat 62 for fixing the rotating arm 61 are provided between the glue coating roller 6 and the connecting plate 51. The mounting seat 62 is fixedly connected to the bottom of the connecting plate 51, and an adjusting joint 63 is provided in the middle section of the rotating arm 61. The distance between the glue coating roller 6 and the glue discharge tube 82 can be appropriately adjusted through the mounting seat 62, and the adjusting joint 63 on the rotating arm 61 can finely adjust the distance between the glue coating roller 6 and the wood, thereby adjusting the glue coating thickness on the wood. The glue dispensing rate of the glue dispensing tube 82 is constant. By adjusting the variable speed motor 2, the contact time between the wood and the glue dispensing tube 82 can be adjusted, thereby adjusting the amount of adhesive on the wood. Then, in conjunction with the glue application roller 6, it is applied to a certain thickness of adhesive. Different glue application thicknesses can be selected according to the wood with different hardness to facilitate subsequent processing.

[0030] In this embodiment, a liquid level observation window 83 is provided on one side of the pressure adhesive storage tank 81. The pressure adhesive storage tank 81 is mainly used to store adhesive and apply a certain pressure to it, so that the dispensing rate of the dispensing tube 82 is more uniform. A scale corresponding to the contents of the tank is provided next to the liquid level observation window 83. The remaining amount of adhesive inside can be directly observed through the liquid level observation window 83, which is convenient for real-time replenishment later.

[0031] This invention utilizes multiple glue-dispensing tubes connected to a pressure glue storage tank. Each tube dispenses glue independently, making it suitable for gluing timber of various widths. The glue-dispensing tubes employ a combination of ball bearings and springs to control the dispensing action. When the timber squeezes the ball bearings upwards, the tube begins dispensing glue. After the timber separates from the tube, the spring inside the tube controls the ball bearings to close the tube. Adjusting the variable-speed motor of the conveyor belt controls the contact time between the timber and the glue-dispensing tube, preventing excessive glue waste and thus controlling the glue coating thickness. A dust removal mechanism located before the glue-dispensing tubes uses a micro-motor-driven roller brush to clean sawdust and dust from the timber surface, preventing surface sawdust and dust from affecting the adhesive strength after gluing. The telescopic sleeve and spring at the top of the dust removal mechanism assist in proper dust removal based on the timber thickness, making it suitable for gluing timber of different thicknesses. In addition, the cylinders above the glue-applying roller and the glue-dispensing mechanism can adjust the distance between the glue-applying roller and the glue-dispensing mechanism according to the thickness of the timber. This ensures that the timber can stably contact the glue-dispensing tube of the glue-dispensing mechanism, squeezing the ball bearings to dispense glue. At the same time, it ensures stable contact between the glue-applying roller and the adhesive on the timber, spreading it evenly at a certain thickness. This solves the technical problems of excess and waste of adhesive and difficulty in controlling the uniform thickness of the coating when applying glue to the timber core, thus improving the efficiency and quality of glue application.

[0032] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A glue-applying device for timber, characterized in that: It includes a glue application table (1) and a conveyor belt (13) set in the center of the glue application table (1). One end of the glue application table (1) is fixedly connected to a variable speed motor (2), and the output end of the variable speed motor (2) is fixedly connected to the shaft of the drive roller (11) of the conveyor belt (13). A mounting bracket (3) is connected above the glue application table (1), and a dust removal mechanism (4) and a cylinder (5) are installed on the mounting bracket (3). The dust removal mechanism (4) includes a roller brush (41) and a micro motor (42) connected to one side of the roller brush (41). The output end of the micro motor (42) is fixedly connected to the rotating shaft of the roller brush (41). The piston output end of the cylinder (5) is fixedly connected to a connecting plate (51), and the bottom of the connecting plate (51) is fixedly connected to a glue-applying roller (6) and a glue-dispensing mechanism (8). The glue-dispensing mechanism (8) includes a pressure glue storage tank (81) and a plurality of glue-dispensing pipes (82) uniformly connected to the bottom of the pressure glue storage tank (81). The top center of the dispensing tube (82) is provided with a guide hole (824) and is connected to the pressure storage tank (81). The bottom of the dispensing tube (82) is conical and has a dispensing hole (821). The dispensing hole (821) is provided with a matching ball (822). A miniature spring (823) is provided above the ball (822). The top of the miniature spring (823) is fixedly connected to the top of the dispensing tube (82). The bottom of the dispensing hole (821) is provided with an inwardly protruding limiting and closing ring (8211) to restrict the ball (822) from falling out of the dispensing hole (821). The inner wall of the dispensing hole (821) is provided with a vertical guide groove (825).

2. The gluing device for wood according to claim 1, characterized in that: The dust removal mechanism (4) also includes a brush holder (44) installed above the roller brush (41). A telescopic sleeve (45) is fixedly connected above the brush holder (44). The top end of the telescopic sleeve (45) is fixedly connected to the mounting bracket (3). A spring (46) is sleeved on the outer periphery of the telescopic sleeve (45).

3. The gluing device for wood according to claim 1, characterized in that: The conveyor belt (13) is provided with a plurality of transmission support rollers (12) that are parallel to the drive roller (11).

4. The gluing device for wood according to claim 1, wherein: A rotating crank arm (61) and a mounting base (62) for fixing the rotating crank arm (61) are provided between the coating roller (6) and the connecting plate (51).

5. The glue applicator for timber according to claim 4, characterized in that: The mounting base (62) is fixedly connected to the bottom of the connecting plate (51), and the middle section of the rotating arm (61) is provided with an adjusting joint (63).

6. The gluing device for wood according to claim 1, wherein: The cylinder (5) is fitted with a clamp (52) on its outer periphery and is fixedly connected to the mounting bracket (3) by the clamp (52).

7. The glue applicator for timber according to claim 1, characterized in that: The pressure storage tank (81) is provided with a liquid level observation window (83) on one side.

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