Automatic glue dispensing and glue recycling device for wrapping machines

Abstract

The automatic glue dispensing and glue recycling device for winding machines, through the coordinated design of the inner and outer glue tanks, allows for dynamic glue scraping during inner tank adjustment, solving the leakage problem of traditional passive collection devices. It also adapts to different tube lengths. The outer glue tank does not contact the tube, allowing for the collection of glue overflowing from the inner tank, preventing glue loss and resolving issues of excessive glue and leakage during recycling. After recycling, the glue is filtered sequentially through a T-type filter, a secondary filter, and a tertiary filter, effectively improving filtration quality and resulting in higher uniformity of product strength. The use of a heating device further enhances the utilization efficiency of the recycled glue, enabling glue reuse, reducing material costs, and increasing production efficiency. It eliminates the need for manual glue scraping during machine rotation, meeting safety standards and reducing labor intensity.

Description

Technical Field

[0001] This utility model relates to the technical field of auxiliary equipment for wet molding of fiberglass pipes, specifically an automatic glue dispensing and glue recycling device for a winding machine. Background Technology

[0002] In wet winding technology, the winding machine is the core equipment, responsible for precision molding. Resin-impregnated glass fibers are wound layer by layer onto the surface of a cylindrical mold. During this process, the adhesive scraping step is crucial for quality control. The adhesive scraper must ensure uniform adhesive distribution. Insufficient adhesive will result in incomplete fiber impregnation, leading to white streaks in the tube and weakening its pressure resistance. Excessive adhesive will cause dripping at the bottom of the mold, wasting raw materials and affecting structural density. The process requires precise removal of excess adhesive and the recovery and purification of resin through a two-stage filtration system, achieving a recycling rate of over 80% to ensure the mechanical properties of the finished product, keeping raw material loss below 10%, and improving production economics.

[0003] In existing technologies, the solution disclosed in CN221756837U involves adding an adhesive scraping device to a wrapping machine, but this requires equipment modification, has limited functionality, suffers from adhesive leakage during operation, and is ineffective at scraping adhesive from products with excessive amounts, resulting in low production efficiency. The solution disclosed in CN117021615A is a passive adhesive collection device, primarily addressing environmental pollution and resin waste, but it cannot recover or filter large quantities of adhesive. How to achieve effective scraping and large-scale recovery and filtration of excess adhesive is a pressing issue that needs to be addressed. Summary of the Invention

[0004] The purpose of this invention is to provide an automatic glue dispensing and glue recycling device for a wrapping machine. By setting an external glue tank, it can effectively scrape off excess glue. By setting multi-stage filtration, it can improve the recycling rate of glue. By using a heating device, it can improve the fluidity of the glue and achieve high-efficiency recycling, thus solving the problems in the prior art.

[0005] The technical solution adopted by this utility model to solve its technical problem is: an automatic glue dispensing and glue recycling device for a wrapping machine, including an inner glue tank that can be vertically lifted and horizontally moved. The top of the inner glue tank is open, and a first glue outlet pipe connected to the bottom of the inner glue tank is installed. Arc-shaped grooves are formed on the top of two parallel side walls of the inner glue tank. An inner glue tank scraper is provided on the top of one of the side walls between the two arc-shaped grooves, with the scraper positioned at the higher end of the arc-shaped groove. An outer glue tank is also installed on the outer periphery of the inner glue tank. A slot communicating with the outer glue tank is formed on the side wall of the inner glue tank. A T-shaped filter screen is also installed inside the inner glue tank. The horizontal mesh of the T-shaped filter is located at the bottom of the slot, and the vertical mesh is located on one side along the length of the slot. A secondary recycling tank is installed at the bottom of the inner glue tank, and a tertiary recycling tank is installed at the bottom of the secondary recycling tank. A heating device is installed at the bottom of the tertiary recycling tank. The secondary recycling tank contains a secondary filter, and a second glue outlet pipe connected to the tertiary recycling tank is installed at the bottom of the secondary recycling tank. The tertiary recycling tank contains a tertiary filter, and a third glue outlet pipe is installed on the side wall of the tertiary recycling tank. The mesh size of the secondary filter is larger than that of the T-shaped filter, and the mesh size of the tertiary filter is larger than that of the secondary filter. Inner glue tank slide rails are installed on both sides along the length of the secondary recycling tank. Guide blocks that cooperate with the inner glue tank slide rails are provided on the side wall of the inner glue tank. A telescopic cylinder is installed on the secondary recycling tank, and the piston rod end of the telescopic cylinder is connected to the side wall of the inner glue tank via a magnet. The heating device includes a heating water tank, inside which an electric heating rod is installed. The positive and negative terminals of the electric heating rod are located on the side wall of the heating water tank, respectively. An inlet and an outlet are also provided on the side wall of the heating water tank. A base plate is provided at the bottom of the heating device, and a lifting cylinder is installed on the base plate. The piston rod of the lifting cylinder is fixedly located at the bottom of the heating device. A guide rod is provided at the bottom of the heating device, and a guide sleeve that mates with the guide rod is provided on the base plate. Two I-beam guide rails are arranged side-by-side at the bottom of the base plate, parallel to the horizontal movement direction of the inner rubber groove box. Bearing-type sliders that mate with the I-beam guide rails are installed at the four corners of the bottom of the base plate. Each bearing-type slider includes a support plate, on which two sets of vertical shafts are arranged side-by-side, and bearings that mate with the I-beam guide rails are installed on the vertical shafts.

[0006] The positive effects of this utility model are as follows: The automatic glue dispensing and glue recycling device for a winding machine, through the coordinated design of the inner and outer glue tanks, allows for dynamic glue scraping during the adjustment of the inner glue tank, solving the glue leakage problem of traditional passive collection devices. It also adapts to different tube lengths. The outer glue tank does not contact the tube, allowing for the collection of glue overflowing from the inner glue tank, preventing glue loss and resolving issues of excessive glue and glue leakage during recycling. After recycling, the glue is filtered sequentially through a T-type filter, a secondary filter, and a tertiary filter, effectively improving the filtration quality and resulting in higher uniformity of product strength. The use of a heating device further enhances the utilization efficiency of the recycled glue, enabling glue reuse, reducing material costs, and increasing production efficiency. It eliminates the need for manual glue scraping during equipment rotation, meeting safety standards and reducing labor intensity. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is the front view of this utility model; Figure 3 yes Figure 2 Yes, it is the right view; Figure 4 yes Figure 2 An enlarged view of the sectional view along the AA direction; Figure 5 This is a structural diagram of the inner glue tray box; Figure 6 This is a schematic diagram of the secondary recycling tank; Figure 7 This is a schematic diagram of the three-stage recycling tank. Figure 8 This is a schematic diagram of the heating device; Figure 9 Yes, this is a schematic diagram of the structure of the bearing-type slider located on the I-beam guide rail. Detailed Implementation

[0008] The present invention relates to an automatic glue dispensing and glue recycling device for a winding machine, such as... Figure 1-5As shown, the device includes an inner glue tank 1 capable of vertical lifting and horizontal movement. The top of the inner glue tank 1 is open, and a first glue outlet pipe 2 is installed at the bottom of the inner glue tank 1. Arc-shaped grooves 3 are formed on the top of two parallel side walls of the inner glue tank 1. An inner glue tank scraper 4 is located on the top of one of the side walls between the two arc-shaped grooves 3, positioned at the higher end of the arc-shaped groove 3. The inner glue tank scraper 4 is located on one side of the bottom of the mold tube and can scrape off the glue on the mold tube. The arc-shaped grooves 3 are designed to fit the shape of the mold tube. Vertical lifting of the inner glue tank 1 allows the inner glue tank scraper 4 to move upwards to contact the mold tube. Horizontal movement of the inner glue tank 1 scrapes and collects the glue along the length of the mold tube, and the scraped glue enters the inner glue tank 1. The vertical lifting and horizontal movement of the inner glue tank 1 can be achieved by using an existing lifting cylinder or electric push rod as power and equipped with a guiding device.

[0009] The tube made in the mold is composed of multiple strands of glass fiber wound together. Each strand needs to be fully impregnated with epoxy resin to ensure its bonding strength. Full impregnation means that the resin completely coats the glass fiber. Therefore, as each glass fiber forms the tube, excess resin is squeezed out to the surface. An inner resin groove scraper 4 is needed to scrape the excess resin into the inner resin groove box 1. In actual use, the resin flows along the inner wall under the scraper and accumulates in the inner resin groove box 1. As the groove moves longitudinally, it collects the resin from the tube. However, if the movement is too fast along the length of the tube, the resin will flow to both sides of the scraper, i.e., out of the inner resin groove box 1.

[0010] To solve the above problems, an outer glue tank 5 is installed on the outer periphery of the inner glue tank 1. The side wall of the inner glue tank 1 is provided with a slot 6 that communicates with the outer glue tank 5. The outer glue tank 5 does not contact the pipe body. During the process of scraping the glue by the inner glue tank scraper 4, most of the glue will fall into the inner glue tank 1, and a small part of the glue that flows out of the scraper will enter the outer glue tank 5 and then enter the inner glue tank 1 through the slot 6, so as to realize the all-round recovery of the scraped glue and avoid glue leakage.

[0011] To filter the recycled adhesive and remove internal impurities, thereby improving the strength of products manufactured using the recycled adhesive, a T-shaped filter screen 7 is installed inside the inner adhesive tank 1. The horizontal mesh of the T-shaped filter screen 7 is located at the lower part of the slot 6, and the vertical mesh is located on one side of the length direction of the slot 6. The first adhesive outlet pipe 2 is located within the space formed by the horizontal and vertical meshes of the T-shaped filter screen 7 and the inner wall of the inner adhesive tank 1. This arrangement of the T-shaped filter screen 7 can filter the adhesive that directly enters the inner adhesive tank 1, or it can filter the adhesive that first enters the outer adhesive tank 5 and then enters the inner adhesive tank 1 through the slot 6, ensuring that the adhesive in the inner adhesive tank 1 is filtered by the T-shaped filter screen 7 before being discharged through the first adhesive outlet pipe 2.

[0012] A secondary recycling tank 8 is installed at the bottom of the inner glue tank 1, and a tertiary recycling tank 9 is installed at the bottom of the secondary recycling tank 8. A heating device is installed at the bottom of the tertiary recycling tank 9. The first glue outlet pipe 2 is connected to the secondary recycling tank 8. A secondary filter screen 10 is installed inside the secondary recycling tank 8. A second glue outlet pipe 11 connected to the tertiary recycling tank 9 is installed at the bottom of the secondary recycling tank 8. A tertiary filter screen 12 is installed inside the tertiary recycling tank 9. A third glue outlet pipe 13 is installed on the side wall of the tertiary recycling tank 9. The mesh size of the secondary filter screen 10 is larger than that of the T-shaped filter screen 7, and the mesh size of the tertiary filter screen 12 is larger than that of the secondary filter screen 10.

[0013] The above three filters allow the adhesive to be filtered three times. The first T-shaped filter 7 filters out the scraped glass fiber filaments. The second secondary filter 10 performs centralized filtration, filtering out short glass fiber filaments and other impurities. The third tertiary filter 12 performs temperature difference filtration. Furthermore, after the adhesive is heated by the heating device in the last layer, its fluidity is enhanced, resulting in a faster filtration speed.

[0014] In the original process, the adhesive scraped off the pipe was collected in a bucket and then placed in an oven for heating until it reached the process temperature before being poured into the impregnation tank. This patent introduces a heating device into the third-layer filtration device, ensuring the filtered adhesive reaches 20℃-27℃ for immediate use. The heating device consumes significantly less electricity than the oven, improving production efficiency and reducing costs. The heating device can be an existing electromagnetic heater or resistance wire heater, converting electrical energy into heat energy and releasing it.

[0015] When using the automatic glue dispensing and glue recycling device for the winding machine described in this utility model, move the inner glue tank 1 to the bottom of the tube body, and let the inner glue tank scraper 4 contact the tube body. Figure 3Rotating counterclockwise in the indicated direction, excess adhesive, under the reverse force of the inner adhesive tank scraper 4, flows along the inner wall of the scraper into the inner adhesive tank box 1. When scraping one circumference of the tube and moving to the next circumference, the inner adhesive tank box 1 needs to move forward along the length of the tube. Excess adhesive will overflow into the outer adhesive tank 5, and the adhesive in the outer adhesive tank 5 will flow back into the inner adhesive tank box 1 through the slot hole 6. Whether the adhesive directly enters the inner adhesive tank box 1 or first enters the outer adhesive tank 5 and then flows back into the inner adhesive tank box 1, it must pass through the T-shaped filter screen 7 to remove some large particles and broken glass fibers, thus achieving automatic scraping and primary filtration of the adhesive.

[0016] After primary filtration, the adhesive solution enters the secondary recovery tank 8 through the first dispensing pipe 2, where it undergoes further filtration through a finer mesh screen 10 to remove even smaller particles. The adhesive solution then enters the tertiary recovery tank 9 through the second dispensing pipe 11, where it is filtered through a denser tertiary filter screen 12. At this point, the adhesive solution temperature is too low to reach the process temperature. The heating device raises the temperature to above 20°C, allowing the adhesive solution to then pass through the third dispensing pipe 13 into the dipping tank of the winding machine, achieving adhesive recycling and reuse. After three layers of filtration, the impurity removal rate can reach 80%, improving the strength and quality of products made from the reused adhesive solution.

[0017] Furthermore, to achieve horizontal movement of the inner glue tank 1, inner glue tank slide rails 29 can be installed on both sides of the secondary recovery tank 8 along its length. Guide blocks 14 that cooperate with the inner glue tank slide rails 29 are provided on the side wall of the inner glue tank 1. A telescopic cylinder 15 is installed on the secondary recovery tank 8. The piston rod end of the telescopic cylinder 15 is connected to the side wall of the inner glue tank 1 via a magnet 16. The telescopic movement of the piston rod of the telescopic cylinder 15 can drive the inner glue tank 1 to move along the length of the tube, thereby scraping off the glue from the outer circumference of the tube. The magnet 16 connects the piston rod of the telescopic cylinder 15 and the inner glue tank 1 magnetically. A ferromagnetic plate that can attract the magnet 16 can be provided on the outer surface of the inner glue tank 1. The advantage of the magnet 16 is that it allows the inner glue tank 1 to easily detach from the telescopic rod during cleaning, facilitating disassembly.

[0018] Furthermore, such as Figure 8As shown, the heating device may include a heating water tank 17, in which an electric heating rod 18 is installed. The positive and negative terminals of the electric heating rod 18 are located on the side wall of the heating water tank 17, respectively. An inlet 19 and an outlet 20 are also provided on the side wall of the heating water tank 17. By introducing water into the inlet 19 as a heat exchange medium, continuous heating of the adhesive can be achieved, improving its fluidity and filtration speed. Combined with the heating device to enhance the fluidity of the adhesive, filtration and temperature control are simultaneously completed, eliminating the need for oven reheating. Compared to the traditional process of returning the adhesive to the oven, this reduces energy consumption and enables immediate recycling of the adhesive.

[0019] Furthermore, in order to achieve the vertical lifting and lowering of the inner rubber tank 1, the bottom of the heating device can be provided with a base plate 21, and a lifting cylinder 22 is installed on the base plate 21. The piston rod of the lifting cylinder 22 is fixedly set at the bottom of the heating device. The bottom of the heating device is provided with a guide rod 23, and the base plate 21 is provided with a guide sleeve 24 that cooperates with the guide rod 23. The setting of the guide rod 23 and the guide sleeve 24 provides the necessary guidance for the vertical lifting and lowering of the device, and also makes the device more stable when it moves up and down.

[0020] When the length of the tube for scraping adhesive is short, full coverage scraping along the length of the tube can be achieved by moving the inner adhesive tank 1 relative to the secondary recycling tank 8. If the tube is a long product, the use of the telescopic cylinder 15 to push the inner adhesive tank 1 is limited. To solve the above problem and allow the inner adhesive tank 1 to move a longer distance, the bottom of the base plate 21 is provided with two I-beam guide rails 25 arranged side by side. The I-beam guide rails 25 are parallel to the horizontal movement direction of the inner adhesive tank 1. Bearing-type sliders that cooperate with the I-beam guide rails 25 are installed at the four corners of the bottom of the base plate 21.

[0021] like Figure 9 As shown, each bearing-type slider includes a support plate 26. The support plate 26 has two sets of vertical shafts 27 arranged side-by-side. Bearings 28 that mate with the I-beam guide rails 25 are mounted on the vertical shafts 27. The bearings 28 on both sides clamp and fix the I-beam guide rails 25, and their rotation reduces friction during relative movement. The adhesive scraping device can move relative to the length of the I-beam guide rails 25 under manual or external motor drive. This allows the adhesive recovery device to be freely adjusted according to the pipe length, supporting adaptability to large products.

[0022] In this utility model patent, the coordinated design of the inner glue tank 1 and the outer glue tank 5 can scrape off excess epoxy resin from the tube body, solving the problem of excessive resin that occurs and cannot be avoided in production, and preventing excessive resin from affecting the quality of the tube body. The resin is filtered and recycled through multiple layers of filters. The scraped resin undergoes primary filtration through a high-density filter, followed by secondary and tertiary filtration, resulting in an impurity removal rate of over 80%. A heating device further enhances the utilization efficiency of the epoxy resin by raising its temperature. Heating also improves its fluidity, eliminating the need for reheating in an oven before directly pouring the resin into the impregnation tank, achieving high-efficiency recycling.

[0023] The technical solution of this utility model is not limited to the scope of the embodiments described herein. All technical contents not described in detail herein are publicly known technologies.

Claims

1. An automatic glue dispensing and glue recycling device for a winding machine, characterized in that: The device includes an inner glue tank (1) capable of vertical lifting and horizontal movement. The top of the inner glue tank (1) is open, and a first glue outlet pipe (2) is installed at the bottom of the inner glue tank (1). Arc-shaped grooves (3) are provided on the top of two parallel side walls of the inner glue tank (1). An inner glue tank scraper (4) is provided on the top of one of the side walls between the two arc-shaped grooves (3). The inner glue tank scraper (4) is located at the higher end of the arc-shaped groove (3). An outer glue tank (5) is also installed on the outer periphery of the inner glue tank (1). A slot (6) communicating with the outer glue tank (5) is provided on the side wall of the inner glue tank (1). A T-shaped filter screen (7) is also installed inside the inner glue tank (1). The horizontal mesh of the T-shaped filter screen (7) is located below the slot (6). The vertical mesh is located on one side of the length direction of the slot (6). A secondary recycling tank (8) is installed at the bottom of the inner glue tank box (1). A tertiary recycling tank (9) is installed at the bottom of the secondary recycling tank (8). A heating device is installed at the bottom of the tertiary recycling tank (9). A secondary filter screen (10) is installed in the secondary recycling tank (8). A second glue outlet pipe (11) connected to the tertiary recycling tank (9) is installed at the bottom of the secondary recycling tank (8). A tertiary filter screen (12) is installed in the tertiary recycling tank (9). A third glue outlet pipe (13) is installed on the side wall of the tertiary recycling tank (9). The mesh count of the secondary filter screen (10) is greater than that of the T-type filter screen (7). The mesh count of the tertiary filter screen (12) is greater than that of the secondary filter screen (10).

2. The automatic glue dispensing and glue recycling device for a winding machine according to claim 1, characterized in that: Both sides of the secondary recycling tank (8) are equipped with inner glue tank slide rails (29) in the length direction. The inner glue tank box (1) has guide blocks (14) on its side wall that cooperate with the inner glue tank slide rails (29). A telescopic cylinder (15) is installed on the secondary recycling tank (8). The piston rod end of the telescopic cylinder (15) is connected to the side wall of the inner glue tank box (1) through a magnet block (16).

3. The automatic glue dispensing and glue recycling device for a winding machine according to claim 1, characterized in that: The heating device includes a heating water tank (17), and an electric heating rod (18) is installed inside the heating water tank (17). The positive and negative terminals of the electric heating rod (18) are located on the side wall of the heating water tank (17), and an inlet (19) and an outlet (20) are also provided on the side wall of the heating water tank (17).

4. The automatic glue dispensing and glue recycling device for a winding machine according to claim 1, characterized in that: The heating device has a base plate (21) at the bottom, and a lifting cylinder (22) is installed on the base plate (21). The piston rod of the lifting cylinder (22) is fixedly installed at the bottom of the heating device. The bottom of the heating device has a guide rod (23), and the base plate (21) has a guide sleeve (24) that cooperates with the guide rod (23).

5. The automatic glue dispensing and glue recycling device for a winding machine according to claim 4, characterized in that: The bottom of the base plate (21) is provided with two I-beam guide rails (25) arranged side by side. The I-beam guide rails (25) are parallel to the horizontal movement direction of the inner rubber groove box (1). Bearing-type sliders that cooperate with the I-beam guide rails (25) are installed at the four corners of the bottom of the base plate (21). Each bearing-type slider includes a support plate (26). The support plate (26) is provided with two sets of vertical shafts (27) arranged side by side. Bearings (28) that cooperate with the I-beam guide rails (25) are installed on the vertical shafts (27).

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