A single-layer paper straw continuous forming and gluing device and manufacturing method

Abstract

The application provides a single-layer paper straw continuous forming and gluing device and a manufacturing method, and relates to the technical field of paper straw production and processing. The device comprises a feeding assembly, a dispensing assembly, a glue liquid concentration assembly, a forming assembly, a heat sealing machine and a traction assembly. The feeding assembly is used for storing a paper straw roll. The paper straw roll can sequentially pass through the dispensing assembly, the glue liquid concentration assembly, the forming assembly, the heat sealing machine and the traction assembly. The dispensing assembly can apply glue liquid to one side edge of the paper straw roll. The glue liquid concentration assembly can concentrate the glue liquid applied to the paper straw roll. The forming assembly can bend the paper straw roll and cover one side of the paper straw roll, on which glue liquid is applied, on the other side. The heat sealing machine can abut against the overlapping part of the paper straw roll and supply heat to the overlapping part. The traction assembly can drive the formed paper straw roll to move in the direction from the dispensing assembly to the heat sealing machine. The application has the advantage that the glue liquid is not easy to spread when the paper straw roll is bent.

Description

Technical Field

[0001] This application relates to the field of paper straw production and processing technology, and in particular to a single-layer paper straw continuous forming and gluing device and manufacturing method. Background Technology

[0002] Paper straws are straws made of paper. A single-layer paper straw continuous forming and coating device is a device used to coat paper strips with glue and roll the paper strips into a tube shape.

[0003] Existing apparatus for preparing single-layer paper straws generally includes an adhesive coating device, a forming mold, and a heat sealing device. In preparing a paper straw, the adhesive coating device first applies adhesive to one side of a paper strip. Then, the forming mold bends the paper strip along its length to form a tube, with the adhesive-coated side overlapping the other side. Finally, the heat sealing device heats the overlapping area so that the dried adhesive adheres to both sides of the paper strip.

[0004] However, during the process of bending the paper strip coated with adhesive into a tubular structure, the adhesive on one side of the paper strip is prone to spreading and dripping from the paper strip or flowing to the other side of the paper strip, causing the paper straw to be poorly bonded and become waste. In addition, the adhesive dripping from the paper strip will also dirty the device for preparing single-layer paper straws.

[0005] In view of this, there is a need to provide a device for continuous forming and gluing of single-layer paper straws and a manufacturing method thereof. Summary of the Invention

[0006] To address the problem that adhesive tends to spread during the preparation of single-layer paper straws, leading to defective products or soiling of the equipment, this application provides a continuous forming adhesive coating apparatus and manufacturing method for single-layer paper straws.

[0007] In a first aspect, this application provides a single-layer paper straw continuous forming and gluing device, which adopts the following technical solution: it includes a feeding component, a dispensing component, a glue concentration component, a forming component, a heat sealing machine, and a traction component. The feeding component is used to store paper straw rolls, and the paper straw rolls can sequentially pass through the dispensing component, the glue concentration component, the forming component, the heat sealing machine, and the traction component.

[0008] The dispensing assembly can apply adhesive to one side of the paper straw roll, the adhesive concentration assembly can concentrate the adhesive applied to the paper straw roll, the forming assembly can bend the paper straw roll and cover the side of the paper straw roll with adhesive onto the other side, the heat sealing machine can abut against the overlapping part of the paper straw roll and supply heat to the overlapping part, and the traction assembly can drive the formed paper straw to move in the direction from the dispensing assembly to the heat sealing machine.

[0009] By adopting the above technical solution, the adhesive concentration component can concentrate the adhesive applied to the paper straw roll, so that when the paper straw roll is bent by the forming component, the concentrated adhesive is not easy to spread, thereby reducing the situation of adhesive spreading causing waste or dirtying the equipment.

[0010] Specifically, the adhesive concentration component includes an air blowing pipe and an air source. The air blowing pipe is positioned above the side of the paper straw roll coated with the adhesive, and the length direction of the air blowing pipe is parallel to the feeding direction of the paper straw roll. The end of the air blowing pipe near the dispensing component is closed, and an air inlet connected to the air source is provided on the end of the air blowing pipe away from the dispensing component. Multiple fine holes are provided on the portion of the air blowing pipe facing the paper straw roll.

[0011] By adopting the above technical solution, during the process of the paper straw roll moving from the dispensing assembly to the forming assembly, the air blowing pipe can blow a gentle breeze from top to bottom onto the adhesive applied to the paper straw roll, thereby accelerating the evaporation rate of the solvent in the adhesive and concentrating the adhesive so that it does not easily spread out when it is bent by the forming assembly. The airflow velocity of the air blowing pipe toward the paper straw roll gradually weakens as it approaches the dispensing assembly, thereby avoiding the situation where the adhesive applied to the paper straw roll is blown away by the strong airflow velocity when it first comes into contact with the airflow.

[0012] Furthermore, the adhesive concentration assembly also includes a support plate, on which a support groove matching the paper straw roll is formed along the feeding direction on the support surface of the support plate. The support groove can support the paper straw roll as it moves from the dispensing assembly to the forming assembly.

[0013] By adopting the above technical solution, the support groove can support the paper straw roll when it is blown to the ground by the air pipe, so that the paper straw roll is not easily affected by the airflow and will not flip up and down, resulting in the glue being thrown out of the paper straw roll.

[0014] Furthermore, a limiting strip is provided on one side of the supporting surface of the support plate along the feeding direction, and multiple limiting posts are provided at equal intervals on the other side of the supporting surface of the support plate along the feeding direction. Each limiting post has an abutment surface perpendicular to the horizontal plane on the side near the limiting strip. The abutment surface and the limiting strip form the supporting groove, and the abutment surface can abut against the side of the paper straw roll coated with the adhesive. A ventilation groove is formed between two adjacent limiting posts. Multiple abutment rotating shafts are provided at equal intervals along the feeding direction in the supporting groove. The two ends of the abutment rotating shafts are respectively connected to the limiting strip and the adjacent limiting post. The length direction of the abutment rotating shaft is perpendicular to the feeding direction and parallel to the horizontal plane. Each abutment rotating shaft is rotatably connected to an abutment pressure roller, which can abut against the part of the paper straw roll except for the area where the adhesive is to be applied.

[0015] By adopting the above technical solution, the paper straw roll can be clamped between the abutting pressure roller and the bottom of the support groove, so that the paper straw roll remains horizontal during the process of moving from the dispensing assembly to the forming assembly. This avoids the paper straw roll from flipping up and down due to airflow, which would affect the normal operation of the dispensing assembly and the forming assembly. When the abutting pressure roller comes into contact with the paper straw roll, it will not come into contact with the adhesive applied to the paper straw roll, thus preventing the adhesive applied to the paper straw roll from being crushed by the abutting pressure roller. After the airflow comes into contact with the paper straw roll, it can leave the guide groove through the ventilation groove, so that the airflow is less likely to form turbulence in the guide groove. This prevents the adhesive applied to the paper straw roll from being blown away by turbulence or the paper straw roll from vibrating up and down under the influence of turbulence.

[0016] Optionally, the support plate is equipped with a circulating hot water pipe inside.

[0017] By adopting the above technical solution, the temperature inside the support tank can be increased by setting up a circulating hot water pipe, which can heat the adhesive applied to the paper straw roll, thereby increasing the concentration speed of the adhesive.

[0018] Furthermore, the dispensing assembly includes a receiving plate, a pair of movable slot blocks, and a dispensing machine. The receiving plate has multiple oblong holes, which are symmetrically arranged along the feeding direction, and the length direction of each oblong hole is perpendicular to the feeding direction. Each of the two movable slot blocks has a fixing through hole that matches the oblong hole. A bolt passes through the fixing through hole, and the threaded section of the bolt can extend into the oblong hole and be screwed into a nut to fix the movable slot block to the receiving frame. A guide groove matching the paper straw roll is formed between the two movable slot blocks. The dispensing head of the dispensing machine can abut against one side of the paper straw roll to apply the adhesive to that side.

[0019] By adopting the above technical solution, the guide groove can limit the paper straw roll, so that the dispensing head can apply adhesive to the paper straw roll; the waist-shaped hole can facilitate the adjustment of the distance between the two moving groove blocks, so that the width of the guide groove can adapt to paper straw rolls of different widths.

[0020] Furthermore, the dispensing assembly also includes multiple receiving pressure rollers, and a receiving rotating shaft is provided in the guide groove. The length direction of the receiving rotating shaft is perpendicular to the feeding direction and parallel to the horizontal plane. One end of the receiving rotating shaft is connected to the movable groove block near the dispensing head. The receiving pressure rollers are rotatably connected to the receiving rotating shaft. The receiving pressure rollers can abut against the portion of the paper straw roll except for the area where the adhesive is to be applied, so that the bottom surface of the paper straw roll fits against the bottom of the guide groove.

[0021] By adopting the above technical solution, the paper straw roll can be clamped between the receiving pressure roller and the bottom of the guide groove, so that the paper straw roll is less likely to deviate during movement, causing the dispensing head to come into contact with and apply adhesive to parts of the paper straw roll that are not intended to be coated with adhesive; when the receiving pressure roller comes into contact with the paper straw roll, it will not come into contact with the adhesive applied to the paper straw roll, thereby preventing the adhesive applied to the paper straw roll from being crushed by the receiving pressure roller.

[0022] Specifically, the forming component includes a forming mold and a limiting rod. The forming mold has a forming groove along the feeding direction. A guide section and a forming section are sequentially formed in the forming groove along the feeding direction. The guide section is a conical surface with a diameter that gradually decreases along the feeding direction. The connection between the guide section and the forming section is a smooth transition. The forming section is a cylindrical surface with a cross-sectional diameter that is the same as the outer diameter of the formed paper straw. The shape of the limiting rod matches the forming groove. The limiting rod is fixedly connected to the forming mold, and a forming gap is formed between the limiting rod and the groove wall of the forming groove. The paper straw roll can enter the forming gap and automatically bends when passing through the forming gap.

[0023] By adopting the above technical solution, when the paper straw roll passes through the guide section, its two sides will gradually bend upward along the groove wall of the conical surface, and finally overlap each other when it is about to enter the forming section, so that the paper straw roll maintains a tubular structure after entering the forming section, thereby enabling the heat sealing machine to contact the overlapping part of the paper straw roll and supply heat to the overlapping part.

[0024] Specifically, the traction assembly includes a traction frame, a support plate, pulleys, a belt, and a drive device. The traction frame has two support plates arranged sequentially from top to bottom. The surface of each support plate extends along the feeding direction, and the pulleys are rotatably connected to both ends of each support plate along the feeding direction. The two pulleys on the same support plate are connected by belt drive. The drive device is connected to the pulleys and can drive the pulleys to rotate along the feeding direction. A traction space matching the formed paper straw is formed between the upper and lower belts, so that the paper straw can be driven by the belt and move along the feeding direction when it enters the traction space.

[0025] By adopting the above technical solution, the drive device can drive both the upper and lower belts to rotate in the feeding direction, so that the belts can apply a frictional force to the paper suction tube entering the traction space in the feeding direction, thereby enabling the paper suction tube to move in the feeding direction.

[0026] Secondly, the single-layer paper straw manufacturing method provided in this application adopts the following technical solution:

[0027] S1. Apply adhesive evenly to the predetermined adhesive application position on the paper straw roll using the dispensing assembly;

[0028] S2. Use the adhesive concentration component to accelerate the evaporation of solvent in the adhesive applied to the paper straw roll, so as to concentrate the adhesive.

[0029] S3. Use the forming component to bend the paper straw roll into a tube shape, and make the side of the paper straw roll coated with adhesive cover the other side.

[0030] S4. Use a heat sealing machine to heat and bond the overlapping parts of the paper straw roll;

[0031] S5. Use the traction component to drive the formed paper straw to continue moving along the feeding direction.

[0032] By adopting the above technical solution, the adhesive is less likely to spread when the paper straw roll is bent and formed, thereby reducing the occurrence of waste products or equipment dirt caused by the spread of adhesive.

[0033] In summary, this application includes at least one of the following beneficial technical effects:

[0034] 1. An air blowing pipe is installed to blow a gentle breeze from top to bottom onto the adhesive applied to the paper straw roll, which accelerates the evaporation rate of the solvent in the adhesive and concentrates the adhesive. This prevents the concentrated adhesive from spreading when the paper straw roll is bent by the forming component, thus reducing the possibility of adhesive spreading and causing waste or equipment contamination. The support groove and abutment roller clamp the paper straw roll between the abutment roller and the bottom of the support groove, keeping the paper straw roll horizontal as it moves from the dispensing component to the forming component. This prevents the paper straw roll from being flipped up and down by airflow, which could cause the adhesive to be thrown out of the paper straw roll.

[0035] 2. Installing a circulating hot water pipe inside the support plate can increase the temperature inside the support groove, thereby heating the adhesive applied to the paper straw roll and increasing the concentration speed of the adhesive. Attached Figure Description

[0036] Figure 1 This is a perspective view of a single-layer paper straw continuous forming and gluing device according to this application.

[0037] Figure 2 yes Figure 1 A schematic enlarged view of area A in the middle, showing the dispensing assembly.

[0038] Figure 3 It is along Figure 2 A schematic cross-sectional view taken along the central axis in the length direction of a mid-waisted hole.

[0039] Figure 4 yes Figure 1 A schematic enlarged view of area B in the middle, showing the molding components and the hot press.

[0040] Figure 5 It is along Figure 4A schematic cross-sectional view of the molding assembly and the hot press, taken from the central axis of the middle limit rod.

[0041] Figure 6 yes Figure 1 A schematic enlarged view of region C, showing the adhesive concentration component.

[0042] Figure 7 yes Figure 1 A schematic enlarged view of region D, showing the traction assembly.

[0043] Figure 8 It is along Figure 7 A schematic cross-sectional view taken along the axis of the belt along its length.

[0044] Reference numerals: 1. Feeding assembly; 2. Dispensing assembly; 21. Receiving plate; 211. Waist-shaped hole; 22. Moving trough block; 221. Fixing through hole; 23. Dispensing machine; 24. Receiving pressure roller; 241. Receiving rotating shaft; 25. Vertical support plate; 251. Connecting through hole; 3. Adhesive concentration assembly; 31. Air blowing pipe; 311. Air inlet; 32. Support plate; 321. Limiting strip; 322. Limiting position. Column; 323, Abutting shaft; 3231, Abutting pressure roller; 324, Circulating hot water pipe; 325, Support groove; 326, Ventilation groove; 4, Molding component; 41, Molding mold; 411, Guide section; 412, Molding section; 42, Limiting rod; 43, Limiting rod connector; 5, Heat sealing machine; 6, Traction component; 61, Traction frame; 62, Bearing plate; 63, Pulley; 64, Belt. Detailed Implementation

[0045] Figure 1 This is a perspective view of a single-layer paper straw continuous forming and gluing device according to this application. Figure 2 yes Figure 1 A schematic enlarged view of area A in the middle, showing the dispensing assembly. (Refer to...) Figure 1 and Figure 2A continuous forming and gluing device for single-layer paper straws includes a feeding assembly 1, a dispensing assembly 2, a glue concentration assembly 3, a forming assembly 4, a heat sealing machine 5, and a traction assembly 6. The feeding assembly 1 stores paper straw rolls, which sequentially pass through the dispensing assembly 2, the glue concentration assembly 3, the forming assembly 4, the heat sealing machine 5, and the traction assembly 6. The dispensing assembly 2 applies food-grade adhesive to one side of the paper straw roll. The glue concentration assembly 3 concentrates the applied adhesive on the paper straw roll. The forming assembly 4 bends the paper straw roll and... One side of the paper straw roll coated with adhesive overlaps the other side. An adhesive concentration component 3 is provided to concentrate the adhesive applied to the paper straw roll, so that when the paper straw roll is bent by the forming component 4, the concentrated adhesive is less likely to spread, thereby reducing the possibility of adhesive spreading and causing waste or equipment contamination. The heat sealing machine 5 can abut against the overlapping part of the paper straw roll and supply heat to the overlapping part to accelerate the curing of the adhesive and achieve effective bonding. The traction component 6 can drive the formed paper straw to move in the direction from the dispensing component 2 to the heat sealing machine 5 to achieve automatic feeding.

[0046] Figure 3 It is along Figure 2 A schematic cross-sectional view taken along the central axis of the mid-waisted hole along its length. See also... Figure 2 and Figure 3 The feeding assembly 1 includes a straw paper roll feeding tray, and the dispensing assembly 2 includes a receiving plate 21, a pair of movable slot blocks 22, and a dispensing machine 23. The receiving plate 21 has four oblong holes 211, which are symmetrically arranged in pairs along the feeding direction, and the length direction of each oblong hole 211 is perpendicular to the feeding direction. Each of the two movable slot blocks 22 has a fixing through hole 221 that matches the oblong hole 211. A bolt is inserted into the fixing through hole 221, and the screw section of the bolt can extend into the oblong hole 211 and be screwed with a nut. The movable slot block 22 is fixedly connected to the receiving frame by the bolt and nut. A guide groove matching the straw paper roll is formed between the two movable slot blocks 22. The guide groove can limit the straw paper roll, so that the dispensing head of the dispensing machine 23 can abut against one side of the straw paper roll and apply glue to that side.

[0047] Understandably, when adjusting the width of the guide groove, both bolts on the same movable groove block 22 can be unscrewed from their corresponding nuts, allowing the movable groove block 22 to move along the oblong hole 211. After the movable groove block 22 is moved to the appropriate position, all the unscrewed bolts are screwed back into their corresponding nuts to fix the position of the movable groove block 22, thereby enabling the adjustment of the guide groove width to accommodate paper straw rolls of different widths. Specifically, the dispensing assembly 2 may also include a vertical support plate 25, on which multiple rows of connecting through holes 251 are equally spaced from bottom to top. This allows workers to screw the vertical support plate 25 to the receiving plate 21 by inserting bolts through the same row of connecting through holes 251, and also allows workers to adjust the height of the receiving plate 21 by selecting connecting through holes 251 of different heights to screw into the receiving plate 21.

[0048] Specifically, the dispensing assembly 2 also includes multiple receiving pressure rollers 24, and a receiving rotating shaft 241 is provided in the guide groove. The length direction of the receiving rotating shaft 241 is perpendicular to the feeding direction and parallel to the horizontal plane. One end of the receiving rotating shaft 241 is connected to the moving groove block 22 near the dispensing head. The receiving pressure rollers 24 are rotatably connected to the receiving rotating shaft 241. The receiving pressure rollers 24 can abut against the part of the paper straw roll except for the area where the glue is to be applied. While preventing the glue applied to the paper straw roll from being crushed by the abutting pressure rollers 3231, the paper straw roll can also be clamped between the receiving pressure rollers 24 and the bottom of the guide groove, so that the paper straw roll is less likely to deviate during movement, resulting in the dispensing head abutting against the part of the paper straw roll other than the area where the glue is to be applied and applying glue.

[0049] Figure 4 yes Figure 1 A schematic enlarged view of area B, showing the molding components and the hot press. Figure 5 It is along Figure 4 A schematic cross-sectional view of the molding assembly and the hot press, taken along the central axis of the middle limiting rod. See also... Figure 4 and Figure 5The forming component 4 includes a forming mold 41, a limiting rod 42, and a limiting rod connector 43. The forming mold 41 has a forming groove along the feeding direction. A guide section 411 and a forming section 412 are sequentially formed in the forming groove along the feeding direction. The guide end is a conical surface with a diameter that gradually decreases along the feeding direction. The connection between the guide section 411 and the forming section 412 is smooth. The forming section 412 is a cylindrical surface with a cross-sectional diameter that is the same as the outer diameter of the formed paper straw. The shape of the limiting rod 42 matches the forming groove. One end of the limiting rod 42 is fixedly connected to the limiting rod connector 43. The other end of the limiting rod connector 43 extends parallel to the side away from the limiting rod 42 and is fixedly connected to the forming mold 41, so that the limiting rod 42 is suspended in the forming groove and a forming gap is formed between the limiting rod 42 and the groove wall.

[0050] Understandably, as the paper straw roll passes through the guide section 411, its two sides gradually bend upwards along the conical groove wall, finally approaching each other as it enters the forming section 412. Before the single-layer paper straw continuous forming and gluing device starts working, the worker only needs to first send the paper straw roll coated with glue along the forming groove to a position close to the heat sealing machine 5, and then manually attach the side of the paper straw roll coated with glue to the side of the other side to make the paper straw roll in a bonded state. Then, the paper straw roll is sent into the heat sealing machine 5 and the overlapping part of the paper straw roll is brought into contact with the heat sealing machine 5 to heat seal the paper straw roll into a paper straw. Finally, the formed paper straw is sent into the traction component 6. After the single-layer paper straw continuous forming and gluing device starts working, the paper straw rolls that subsequently enter the heat sealing machine 5 will maintain the same bonded state under the guidance of the already formed paper straws, thereby achieving automatic bending and bonding of the paper straw rolls. Specifically, the limiting rod 42 can extend all the way to the bottom of the heat sealing machine 5 so that the overlapping part of the paper straw roll is sandwiched between the limiting rod 42 and the heat sealing machine 5, so that the adhesive in the overlapping part can fully contact the paper straw roll on the upper and lower sides, so that the adhesive can play a better bonding role.

[0051] Figure 6 yes Figure 1 A schematic enlarged view of region C, showing the adhesive concentration assembly. See details... Figure 1 and Figure 6The adhesive concentration component 3 includes an air blowing pipe 31 and an air source device (not shown in the figure). One end of the air blowing pipe 31 rests on the limiting rod connector 43, and the other end of the air blowing pipe 31 is tied to the receiving shaft 241 by a cable tie, so that the air blowing pipe 31 can be located directly above the side of the paper straw roll coated with adhesive. The length direction of the air blowing pipe 31 is parallel to the feeding direction of the paper straw roll. The end of the air blowing pipe 31 near the dispensing component 2 is closed, and the end of the air blowing pipe 31 away from the dispensing component 2 is provided with an air inlet 311 connected to the air source device. The part of the air blowing pipe 31 facing the paper straw roll is provided with multiple fine holes (not shown in the figure), and the diameter of the fine holes can be 1 mm.

[0052] The above design allows the air blowing pipe 31 to blow a gentle breeze from top to bottom onto the adhesive applied to the paper straw roll as it moves from the dispensing assembly 2 to the forming assembly 4. This accelerates the evaporation rate of the solvent in the adhesive, thereby concentrating the adhesive and preventing it from spreading out when it is bent by the forming assembly 4. The design also ensures that the airflow velocity of the air blowing pipe 31 toward the paper straw roll gradually decreases as it approaches the dispensing assembly 2. This prevents the adhesive applied to the paper straw roll from being blown away by the strong airflow velocity when it first comes into contact with the airflow.

[0053] See Figure 1 and Figure 6 The adhesive concentration assembly 3 also includes a support plate 32. A support groove 325, matching the paper straw roll, is formed on the support surface of the support plate 32 along the feeding direction. The support groove 325 supports the paper straw roll as it moves from the dispensing assembly 2 to the forming assembly 4, preventing the paper straw roll from being flipped up and down by airflow, thus preventing the adhesive from being thrown out of the paper straw roll. A limiting strip 321 is provided on one side of the support surface of the support plate 32 along the feeding direction, and multiple limiting posts 322 are equally spaced on the other side of the support surface of the support plate 32 along the feeding direction. Each limiting post 322 has a contact surface perpendicular to the horizontal plane on the side near the limiting strip 321. A support groove 325 is formed between the contact surface and the limiting strip 321, and the contact surface can contact the side of the paper straw roll coated with adhesive. A ventilation groove 326 is formed between two adjacent limiting posts 322, so that the airflow can leave the guide groove through the ventilation groove 326 after contacting the paper straw roll, so that the airflow is not prone to turbulence in the guide groove, thus preventing the adhesive on the paper straw roll from being blown away by turbulence or the paper straw roll from vibrating up and down under the influence of turbulence.

[0054] The support groove 325 is provided with multiple abutment shafts 323 at equal intervals along the feeding direction. The two ends of the abutment shafts 323 are respectively connected to the limiting strip 321 and the adjacent limiting post 322. The length direction of the abutment shafts 323 is perpendicular to the feeding direction and parallel to the horizontal plane. Each abutment shaft 323 is rotatably connected to an abutment pressure roller 3231. The abutment pressure roller 3231 can abut against the part of the paper straw roll except for the area to be coated with adhesive. The above design allows the paper straw roll to be held between the pressure roller 3231 and the bottom of the support groove 325, so that the paper straw roll remains horizontal as it moves from the dispensing assembly 2 to the forming assembly 4. This avoids the paper straw roll from flipping up and down due to airflow, which would affect the normal operation of the dispensing assembly 2 and the forming assembly 4. The above design also ensures that the pressure roller 3231 does not come into contact with the adhesive applied to the paper straw roll when it comes into contact with it, thus preventing the adhesive applied to the paper straw roll from being crushed by the pressure roller 3231.

[0055] See Figure 1 and Figure 6 The support plate 32 is equipped with a circulating hot water pipe 324, which can increase the temperature in the support groove 325 to heat the adhesive applied to the paper straw roll, thereby increasing the concentration speed of the adhesive.

[0056] Figure 7 yes Figure 1 A schematic enlarged view of region D, showing the traction assembly. Figure 8 It is along Figure 7 A schematic cross-sectional view taken along the longitudinal axis of the belt. See also Figure 7 and Figure 8 The traction assembly 6 includes a traction frame 61, a support plate 62, pulleys 63, belts 64, and a drive device. The traction frame 61 has two support plates 62 arranged sequentially from top to bottom. The surface of each support plate 62 extends along the feeding direction, and pulleys 63 are rotatably connected to both ends of each support plate 62 along the feeding direction. The two pulleys 63 located on the same support plate 62 are connected by a belt 64. The drive device is connected to the pulleys 63 and can drive the pulleys 63 to rotate along the feeding direction. A traction space matching the formed paper straw is formed between the upper and lower belts 64. The belts 64 can apply a frictional force to the paper straw entering the traction space along the feeding direction, thereby enabling the paper straw to move along the feeding direction.

[0057] Based on the structure of the above-mentioned continuous forming and gluing apparatus for single-layer paper straws, a second aspect of this application also provides a method for manufacturing single-layer paper straws. This method utilizes the aforementioned continuous forming and gluing apparatus for single-layer paper straws, and specifically includes:

[0058] S1. Apply adhesive evenly to a predetermined adhesive application position on the paper straw roll using the dispensing assembly. The predetermined adhesive application position may be the side edge of the paper straw roll along its own length direction.

[0059] S2. The solvent in the adhesive applied to the paper straw roll is accelerated by heating the adhesive or increasing the gas flow rate on the surface of the adhesive using an adhesive concentration component, so as to concentrate the adhesive.

[0060] S3. Use the forming component to bend the paper straw roll into a tube shape, and make the side of the paper straw roll coated with adhesive cover the other side.

[0061] S4. Use a heat sealing machine to heat and bond the overlapping parts of the paper straw roll;

[0062] S5. The traction component is used to drive the formed paper straw to continue moving along the feeding direction, so that the subsequent paper straw roll can move along the direction from the dispensing component to the heat sealing machine, thereby realizing automatic feeding.

[0063] Since the single-layer paper straw manufacturing method of this application is implemented by the above-mentioned single-layer paper straw continuous forming and coating device, it can also have all the technical effects of the above-mentioned single-layer paper straw continuous forming and coating device. In particular, it can concentrate the glue before the paper straw roll is bent by the forming component 4, so that the concentrated glue is not easy to spread when the paper straw roll is bent by the forming component 4, thereby reducing the situation of glue spreading and causing waste or dirtying the equipment.

[0064] The implementation principle of the single-layer paper straw continuous forming and gluing device described in this application is as follows:

[0065] The air blowing pipe 31 blows a gentle breeze from top to bottom onto the adhesive applied to the paper straw roll, accelerating the evaporation rate of the solvent in the adhesive and concentrating it. This prevents the concentrated adhesive from spreading when the paper straw roll is bent by the forming component 4, thus reducing the risk of waste or equipment contamination. The support groove 325 and the abutment roller 3231 hold the paper straw roll between the bottom of the abutment roller 3231 and the support groove 325, keeping the paper straw roll horizontal as it moves from the dispensing component 2 to the forming component 4. This prevents the paper straw roll from being flipped up and down by the airflow, which could cause the adhesive to be thrown out of the paper straw roll.

[0066] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A continuous forming and gluing device for single-layer paper straws, characterized in that, include: The assembly includes a feeding component (1), a dispensing component (2), a glue concentration component (3), a forming component (4), a heat sealing machine (5), and a traction component (6). The feeding component (1) is used to store paper straw rolls, which can pass sequentially through the dispensing component (2), the glue concentration component (3), the forming component (4), the heat sealing machine (5), and the traction component (6). The dispensing assembly (2) can apply adhesive to one side of the paper straw roll, the adhesive concentration assembly (3) can concentrate the adhesive applied to the paper straw roll, the forming assembly (4) can bend the paper straw roll and cover the side of the paper straw roll with the adhesive on the other side, the heat sealing machine (5) can abut against the overlapping part of the paper straw roll and supply heat to the overlapping part, and the traction assembly (6) can drive the formed paper straw to move in the direction from the dispensing assembly (2) to the heat sealing machine (5). The adhesive concentration component (3) includes an air blowing pipe (31) and an air source. The air blowing pipe (31) is located above the side of the paper straw roll coated with the adhesive, and the length direction of the air blowing pipe (31) is parallel to the feeding direction of the paper straw roll. The end of the air blowing pipe (31) near the dispensing component (2) is closed, and the end of the air blowing pipe (31) away from the dispensing component (2) is provided with an air inlet (311) connected to the air source. The part of the air blowing pipe (31) facing the paper straw roll is provided with multiple fine holes.

2. The single-layer paper straw continuous forming and gluing device according to claim 1, characterized in that: The adhesive concentration assembly (3) also includes a support plate (32), on which a support groove (325) matching the paper straw roll is formed along the feeding direction. The support groove (325) can support the paper straw roll as it moves from the dispensing assembly (2) to the forming assembly (4).

3. The single-layer paper straw continuous forming and gluing device according to claim 2, characterized in that: The support plate (32) has a limiting strip (321) on one side along the feeding direction on the supporting surface, and multiple limiting posts (322) are equally spaced on the other side along the feeding direction on the supporting surface of the support plate (32). Each limiting post (322) has a contact surface perpendicular to the horizontal plane on the side near the limiting strip (321). The contact surface and the limiting strip (321) form the supporting groove (325), and the contact surface can contact the side of the paper straw roll coated with the adhesive. A ventilation groove is formed between two adjacent limiting posts (322). 326); The support groove (325) is provided with a plurality of abutment shafts (323) at equal intervals along the feeding direction. The two ends of the abutment shafts (323) are respectively connected to the limiting strip (321) and the adjacent limiting post (322). The length direction of the abutment shafts (323) is perpendicular to the feeding direction and parallel to the horizontal plane. Each abutment shaft (323) is rotatably connected with an abutment pressure roller (3231). The abutment pressure roller (3231) can abut against the part of the paper straw roll except for the area where the adhesive is to be applied.

4. A single-layer paper straw continuous forming and gluing device according to any one of claims 2 or 3, characterized in that: The support plate (32) is equipped with a circulating hot water pipe (324).

5. The single-layer paper straw continuous forming and gluing device according to claim 1, characterized in that: The dispensing assembly (2) includes a receiving plate (21), a pair of movable slots (22), and a dispensing machine (23). The receiving plate (21) has multiple oblong holes (211), which are symmetrically arranged along the feeding direction, and the length direction of each oblong hole (211) is perpendicular to the feeding direction. Each of the two movable slots (22) has a fixing through hole (221) that matches the oblong hole (211). A bolt is inserted through the through hole (221), and the bolt's threaded section can extend into the waist-shaped hole (211) and be screwed into the nut, so that the movable slot block (22) is fixedly connected to the receiving frame by the bolt and the nut being screwed into it. A guide groove matching the paper straw roll is formed between the two movable slot blocks (22). The dispensing head of the dispensing machine (23) can abut against one side of the paper straw roll to apply the adhesive at that side.

6. The single-layer paper straw continuous forming and gluing device according to claim 5, characterized in that: The dispensing assembly (2) also includes multiple receiving pressure rollers (24). A receiving rotating shaft (241) is provided in the guide groove. The length direction of the receiving rotating shaft (241) is perpendicular to the feeding direction and parallel to the horizontal plane. One end of the receiving rotating shaft (241) is connected to the moving groove block (22) near the dispensing head. The receiving pressure rollers (24) are rotatably connected to the receiving rotating shaft (241). The receiving pressure rollers (24) can abut against the part of the paper straw roll except for the area where the adhesive is to be applied, so that the bottom surface of the paper straw roll is in contact with the bottom of the guide groove.

7. The single-layer paper straw continuous forming and gluing device according to claim 1, characterized in that: The forming component (4) includes a forming mold (41) and a limiting rod (42). The forming mold (41) has a forming groove along the feeding direction. A guide section (411) and a forming section (412) are formed sequentially in the forming groove along the feeding direction. The guide section (411) is a conical surface with a diameter that gradually decreases along the feeding direction. The connection between the guide section (411) and the forming section (412) is smooth. The forming section (412) is a cylindrical surface with a cross-sectional diameter that is the same as the outer diameter of the formed paper straw. The shape of the limiting rod (42) matches the forming groove. The limiting rod (42) is fixedly connected to the forming mold (41) and a forming gap is formed between the limiting rod (42) and the groove wall of the forming groove. The paper straw roll can enter the forming gap and automatically bend when passing through the forming gap.

8. The single-layer paper straw continuous forming and gluing device according to claim 1, characterized in that: The traction assembly (6) includes a traction frame (61), a support plate (62), a pulley (63), a belt (64), and a drive device. The traction frame (61) has two support plates (62) arranged sequentially from top to bottom. The surface of each support plate (62) extends along the feeding direction, and the pulleys (63) are rotatably connected to both ends of each support plate (62) along the feeding direction. The two pulleys (63) located on the same support plate (62) are connected by the belt (64). The drive device is connected to the pulleys (63) and can drive the pulleys (63) to rotate along the feeding direction. A traction space matching the formed paper straw is formed between the upper and lower belts (64), so that the paper straw can be driven by the belt (64) and move along the feeding direction when it enters the traction space.

9. A method for manufacturing a single-layer paper straw, implemented using the continuous forming and gluing apparatus for single-layer paper straws as described in any one of claims 1 to 8, characterized in that: S1. Apply adhesive evenly to the predetermined adhesive application position on the paper straw roll using the dispensing assembly; S2. Use the adhesive concentration component to accelerate the evaporation of solvent in the adhesive applied to the paper straw roll, so as to concentrate the adhesive. S3. Use the forming component to bend the paper straw roll into a tube shape, and make the side of the paper straw roll coated with adhesive cover the other side. S4. Use a heat sealing machine to heat and bond the overlapping parts of the paper straw roll; S5. Use the traction component to drive the formed paper straw to continue moving along the feeding direction.

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