Hot melt adhesive stirring device

Abstract

The present application relates to a kind of hot melt glue stirring device, including container, air pump and stirring assembly, container is used to accommodate hot melt glue;Air pump is arranged on the container, for the hot melt glue is discharged to make the bubble in hot melt glue interior;Stirring assembly divides container into discharge area and stirring area, stirring assembly includes rotating shaft and stirring piece, rotating shaft is arranged in container, stirring piece is connected to the end of rotating shaft away from container, stirring piece is provided with parabolic groove, parabolic groove is recessed towards the axis direction close to rotating shaft, parabolic groove is used to throw hot melt glue from stirring area to discharge area, air pump is arranged in discharge area, the track of hot melt glue from parabolic groove to discharge area is recorded as first track, the track of air pump discharge is recorded as second track, first track and second track intersect.Gas and the impact of hot melt glue, bubble is generated, it helps to reduce the viscosity of hot melt glue, because the existence of bubble can introduce gap in hot melt glue, reduce the interaction force between molecules, so that hot melt glue more easily flow.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hot melt adhesive film, in particular to a hot melt adhesive stirring device. BACKGROUND

[0002] Hot melt adhesive is a solid adhesive composed of high molecular polymer, resin and other additives. It is melted into a flowing liquid by heating, and then solidified into a solid adhesive during the cooling process. It can be applied or sprayed in liquid form on the surface to be bonded after heating, and then quickly solidified to form a strong bond. However, if the viscosity is too high during the process of applying or spraying on the surface to be bonded, it may result in uneven coating thickness during the application process, especially at the edges or corners. This may cause inconsistencies in the appearance or functional differences of the product. Secondly, high viscosity hot melt adhesive may result in a rough surface of the coating, with unevenness or poor texture. This may affect the texture and appearance of the product. Moreover, high viscosity hot melt adhesive may have difficulty penetrating into small pores or fibers during the application process, reducing the permeability and coverage of the coating.

[0003] Therefore, it is necessary to provide a hot melt adhesive stirring device to solve the problem of high viscosity of hot melt adhesive during the process of applying or spraying on the surface to be bonded. SUMMARY

[0004] The present application provides a hot melt adhesive stirring device to solve the problem of high viscosity of hot melt adhesive during the process of applying or spraying on the surface to be bonded.

[0005] A hot melt adhesive stirring device, comprising:

[0006] A container for containing hot melt adhesive;

[0007] A gas pump provided on the container for blowing gas to the hot melt adhesive to generate bubbles inside the hot melt adhesive;

[0008] A stirring assembly for dividing the container into a gas blowing area and a stirring area, the stirring assembly is provided in the container, the stirring assembly includes a rotating shaft and a stirring piece, one end of the rotating shaft is connected to the inside of the container, the other end is connected to the stirring piece, the stirring piece is provided with a parabolic groove, the parabolic groove is recessed towards the axis of the rotating shaft, the parabolic groove is used to throw hot melt adhesive from the stirring area to the gas blowing area, the gas pump is provided in the gas blowing area, the trajectory of hot melt adhesive from the parabolic groove to the gas blowing area is recorded as the first trajectory, the gas blowing trajectory of the gas pump is recorded as the second trajectory, and the first trajectory and the second trajectory intersect.

[0009] In one embodiment, the cross-sectional shape of the parabolic groove is a right angle, and the first trajectory is a parabolic line when viewed along the axis of the rotating shaft.

[0010] In one embodiment, the hot melt adhesive stirring device further comprises a sensor arranged in the container, the sensor is used to detect the trajectory surface of the hot melt adhesive from the parabolic groove to the air outlet area, the inner wall of the parabolic groove has a nearest end and a farthest end from the axis of the rotating shaft, the trajectory of the hot melt adhesive through the nearest end to the air outlet area is recorded as the first curve, the trajectory of the hot melt adhesive through the farthest end to the air outlet area is recorded as the second curve, and the trajectory surface is the interval surface of the first curve and the second curve.

[0011] In one embodiment, the hot melt adhesive stirring device comprises a controller arranged on the outer wall of the container, the sensor and the air pump are electrically connected to the controller, the air pump is provided with an air outlet part, the air outlet part has a first boundary and a second boundary, the first boundary and the second boundary enclose the second trajectory, the controller is used to control the positions of the first boundary and the second boundary, the extension line of the first boundary intersects the first curve, and the extension line of the second boundary intersects the second curve.

[0012] In one embodiment, the stirring part comprises a guide part and a parabolic part connected to the guide part, the parabolic part is provided with a parabolic groove, and the parabolic part is connected to the rotating shaft.

[0013] In one embodiment, the stirring assembly comprises a first stirring part and a second stirring part, the rotating shaft is connected to the first stirring part, the first stirring part is connected to the second stirring part, and the second stirring part is connected to the rotating shaft.

[0014] In one embodiment, the first stirring part comprises a first guide part and a first parabolic part, the second stirring part comprises a second guide part and a second parabolic part, and the first parabolic part is connected to the second parabolic part.

[0015] In one embodiment, the hot melt adhesive stirring device comprises an application assembly arranged at one end of the container away from the air pump, and the application assembly is used to apply hot melt adhesive to the interface in need of bonding.

[0016] In one embodiment, the application assembly comprises a shell and a rolling part, the shell is communicated to one end of the container away from the air pump, and the rolling part is rotationally connected to one end of the shell away from the container.

[0017] In one embodiment, the shell comprises a support part and a cleaning part connected to the support part, the rolling part is rotationally connected to the cleaning part, and the support part is connected to the container.

[0018] The above-mentioned hot melt adhesive mixing device has at least the following beneficial effects:

[0019] First, as the hot melt adhesive is thrown from the parabolic chute into the venting zone, it intersects with the air pump's venting trajectory. This intersection causes collisions between the gas and the hot melt adhesive. These collisions generate bubbles, improving the internal bubble formation within the hot melt adhesive. This bubble formation helps reduce the viscosity of the hot melt adhesive, making it easier to apply or spray onto the surface to be bonded. Second, the intersecting first and second trajectories promote effective mixing of the hot melt adhesive between the mixing and venting zones. As the hot melt adhesive is thrown into the venting zone, it intersects with the air pump's venting trajectory while simultaneously mixing with the surrounding hot melt adhesive. This mixing action evenly disperses the bubbles in the hot melt adhesive throughout the coating area, improving the uniformity and consistency of the coating. Furthermore, the gas collisions and mixing caused by the intersecting first and second trajectories effectively reduce the viscosity of the hot melt adhesive. During bubble formation and mixing, the impact and agitation of the gas disrupt the molecular structure of the hot melt adhesive, reducing the intermolecular attraction and thus lowering its viscosity. In this way, the reduced viscosity of the hot melt adhesive makes it easier to flow and apply, improving the uniformity and effectiveness of the coating process. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of a hot melt adhesive mixing device in a first position according to an embodiment;

[0022] Figure 2 This is a schematic diagram of a hot melt adhesive mixing device in the second position according to an embodiment;

[0023] Figure 3 This is an exploded view of a hot melt adhesive mixing device according to an embodiment;

[0024] Figure 4 This is a schematic diagram of a hot melt adhesive mixing device according to one embodiment;

[0025] Figure 5 This is a schematic diagram of the stirring component of a hot melt adhesive mixing device according to one embodiment;

[0026] Figure 6 for Figure 1 The hot melt adhesive mixing device shown is a cross-sectional view along PP.

[0027] Reference Signs:

[0028] 10, hot melt glue stirring device; 11, container; 12, air pump; 121, air outlet; 121a, first boundary; 121b, second boundary; 13, stirring assembly; 13a, air outlet area; 13b, stirring area; 131, rotating shaft; 132, stirring piece; 1321, guide part; 1322, parabolic part; 1322a, parabolic groove; 1323a, first curve; 1324a, second curve; a1325, trajectory surface; 1326, first stirring piece; 1327, second stirring piece; 14, coating assembly; 141, shell; 1411, support part; 1412, cleaning part; 142, rolling piece; 143, elastic piece. DETAILED DESCRIPTION

[0029] In order to facilitate the understanding of the present application, a more complete understanding of the present application can be had by reference to the following description and the accompanying drawings. In the Figures, the preferred embodiments of the application are depicted. However, the application can be realized in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete. It will fully convey the scope of the application to those skilled in the art, the best mode for carrying out the application, and it will be understood that where

[0030] It is to be understood that where the terms "fixed" or "attached" are used herein, they can be direct or indirect and the term "connected" is not necessarily direct. It is to be understood that the terms "vertical", "horizontal", "left", "right", and the like as used herein are made only for purposes of illustration and are not intended to be limiting.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this description, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0032] Reference Figures 1-6The application discloses a hot melt adhesive stirring device 10, which comprises a container 11, a gas pump 12 and a stirring assembly 13. The container 11 is used for containing hot melt adhesive. The gas pump 12 is arranged on the container 11 and is used for blowing gas to the hot melt adhesive to generate bubbles in the hot melt adhesive. The stirring assembly 13 divides the container 11 into a gas blowing area 13a and a stirring area 13b. The stirring assembly 13 comprises a rotating shaft 131 and a stirring piece 132. The rotating shaft 131 is arranged in the container 11, and the stirring piece 132 is connected to one end of the rotating shaft 131 away from the container 11. The stirring piece 132 is provided with a parabolic groove 1322a, which is recessed towards the axis of the rotating shaft 131. The parabolic groove 1322a is used for throwing the hot melt adhesive from the stirring area 13b to the gas blowing area 13a. The gas pump 12 is arranged in the gas blowing area 13a. The trajectory of the hot melt adhesive from the parabolic groove 1322a to the gas blowing area 13a is recorded as a first trajectory, and the gas blowing trajectory of the gas pump 12 is recorded as a second trajectory. The first trajectory and the second trajectory intersect.

[0033] Firstly, when the hot melt adhesive is thrown from the parabolic groove 1322a to the gas blowing area 13a, it intersects with the gas blowing trajectory of the gas pump 12. This intersection causes the collision of gas and hot melt adhesive, generating bubbles. The formation of bubbles helps to reduce the viscosity of the hot melt adhesive, because the existence of bubbles can introduce voids in the hot melt adhesive, reducing the intermolecular interaction force, making the hot melt adhesive flow more easily. Secondly, the intersecting first trajectory and second trajectory can promote the effective mixing of the hot melt adhesive between the stirring area 13b and the gas blowing area 13a. When the hot melt adhesive is thrown to the gas blowing area 13a, it will also mix with the surrounding hot melt adhesive while intersecting with the gas blowing trajectory of the gas pump 12. This mixing effect can uniformly disperse the bubbles in the hot melt adhesive in the entire coating area, thereby improving the uniformity and consistency of the coating. Moreover, the viscosity of the hot melt adhesive refers to the degree of resistance to flow. The intersecting first trajectory and second trajectory cause the interaction of gas and hot melt adhesive, causing the formation of bubbles and the stirring of the hot melt adhesive. This action can destroy the molecular structure of the hot melt adhesive, reduce the intermolecular attraction, thereby reducing the viscosity of the hot melt adhesive. Reducing the viscosity of the hot melt adhesive helps to increase its flowability, making it easier to penetrate into small pores or fibers, and improving the permeability and coverage of the coating.

[0034] It should be noted that the initial position of the stirring piece 132 is recorded as the first position, and the position where the hot melt adhesive is thrown to the air outlet area 13a by the stirring piece 132 is recorded as the second position. The container 11 can be a hollow hemispherical shape for containing hot melt adhesive, and the air pump 12 is fixedly connected to the container 11. The air outlet of the air pump 12 is located in the container 11, which is used to air the hot melt adhesive to generate bubbles inside the hot melt adhesive. The first trajectory refers to the trajectory of the hot melt adhesive thrown from the parabolic groove 1322a to the air outlet area 13a. That is, the hot melt adhesive is thrown away from the stirring area 13b through the parabolic groove 1322a under the action of the stirring piece 132 and moves to the air outlet area 13a. The second trajectory refers to the trajectory of the air pump 12 discharging air, that is, the path of the air pump 12 discharging air outward. The hot melt adhesive stirring device 10 can further include a driving motor, and the end of the rotating shaft 131 away from the stirring piece 132 is fixedly connected to the output end of the driving motor.

[0035] Specifically, in some embodiments, the cross-sectional shape of the parabolic groove 1322a is a right angle shape, and the first trajectory is a parabolic line shape as viewed along the axis direction of the rotating shaft 131.

[0036] The hot melt adhesive stirring device 10 can further include a sensor (not shown in the figure) arranged in the container 11. The sensor is used to detect the trajectory surface a1325 of the hot melt adhesive from the parabolic groove 1322a to the air outlet area 13a. As viewed along the axis direction of the rotating shaft 131, the inner wall of the parabolic groove 1322a has a nearest end and a farthest end to the axis of the rotating shaft 131. The trajectory of the hot melt adhesive thrown to the air outlet area 13a through the nearest end is recorded as the first curve 1323a, and the trajectory of the hot melt adhesive thrown to the air outlet area 13a through the farthest end is recorded as the second curve 1324a. The trajectory surface a1325 is the interval surface of the first curve 1323a and the second curve 1324a.

[0037] Reference Figure 4 When the stirring piece 132 is in the second position, the hot melt adhesive is thrown to the air outlet area 13a, and at this time the first trajectory is a parabolic line shape.

[0038] Specifically, the hot melt adhesive stirring device 10 can further include a controller (not shown in the figure) arranged on the outer wall of the container 11. The sensor and the air pump 12 are electrically connected to the controller. The air pump 12 is provided with an air outlet portion 121, and the air outlet portion 121 has a first boundary 121a and a second boundary 121b. The first boundary 121a and the second boundary 121b enclose the second trajectory. The controller is used to control the positions of the first boundary 121a and the second boundary 121b. The extension line of the first boundary 121a intersects the first curve 1323a, and the extension line of the second boundary 121b intersects the second curve 1324a.

[0039] In the embodiment, the driving motor is a direct current motor, and the movement of the rotating shaft 131 is controlled by adjusting the torque and the rotating speed. For example, the torque range can be 10 Nm-20 Nm, the rotating speed range can be 1000 r / min-2000 r / min, and the rotating angle of the rotating shaft 131 can be 90°, so that the first trajectory is a parabolic line. The trajectory surface a 1325 is an interval surface surrounded by the first curve 1323a and the second curve 1324a, which can be regarded as the overall shape of the parabolic line trajectory, and determines the movement range of the hot melt adhesive in the stirring device. In other words, the trajectory surface a 1325 is a collection of the first trajectory. The sensor is an optical sensor, which can use the reflection, absorption or scattering of light to detect the trajectory surface a 1325. For example, when the hot melt adhesive is thrown by the stirring piece 132 to the air outlet area 13a, part of the hot melt adhesive leaves the original liquid surface, and the light source of the container 11 is partially blocked. At this time, the sensor detects the trajectory surface a 1325 of the hot melt adhesive and provides a feedback signal to the controller. The gas of the air pump 12 can be high-pressure gas, so as to control the angle between the first boundary 121a and the second boundary 121b.

[0040] Specifically, the controller controls the positions of the first boundary 121a and the second boundary 121b as follows:

[0041] Firstly, the driving motor outputs torque to drive the stirring piece 132 to rotate, so that the stirring piece 132 throws the hot melt adhesive to the air outlet area 13a. The sensor detects the trajectory surface a 1325 of the hot melt adhesive from the parabolic groove 1322a to the air outlet area 13a and transmits relevant information to the controller. The controller calculates the current trajectory surface a 1325, i.e. the interval surface of the first curve 1323a and the second curve 1324a, according to the information detected by the sensor. According to the parabolic line trajectory surface a 1325, the controller controls the output of the air pump 12 to control the positions and angles of the first boundary 121a and the second boundary 121b. The controller can use a feedback control method to constantly adjust the output of the air pump 12 by monitoring the trajectory information fed back by the sensor in real time, so that the extension line of the first boundary 121a intersects with the first curve 1323a, and the extension line of the second boundary 121b intersects with the second curve 1324a. The controller can be a PID controller, which calculates and adjusts the output according to the errors between the first curve 1323a and the first boundary 121a and between the second curve 1324a and the second boundary 121b, so as to achieve more accurate control. It should be noted that after the driving motor drives the stirring piece 132 to rotate so that the stirring piece 132 throws the hot melt adhesive to the air outlet area 13a, the driving motor is paused for a period of time, and then continues to rotate after the air pump 12 discharges the trajectory surface a 1325.

[0042] By adjusting the positions of the first boundary 121a and the second boundary 121b through the controller, the impact position and angle of the gas bubbles in the hot melt adhesive can be accurately controlled, so that the extension line of the first boundary 121a intersects with the first curve 1323a, and the extension line of the second boundary 121b intersects with the second curve 1324a, which can ensure that the gas accurately impacts the hot melt adhesive to generate bubbles, destroy the cohesion of the hot melt adhesive, and reduce the viscosity of the hot melt adhesive. This can make the hot melt adhesive more easily flow and mix, thereby improving the stirring efficiency and process stability. Secondly, the generated bubbles are accurately covered by the hot melt adhesive, thereby mixing with the hot melt adhesive of the gas outlet area 13a, sequentially reducing the viscosity of the hot melt adhesive of the gas outlet area 13a, and then rotating through the stirring piece 132, so that the hot melt adhesive of the gas outlet area 13a mixes with the hot melt adhesive of the stirring area 13b, thereby reducing the viscosity of the hot melt adhesive in the container 11. This setting will not cause waste of gas, which helps to reduce gas consumption and improve production efficiency and cost-effectiveness.

[0043] In other embodiments, the cross-sectional shape of the parabolic groove 1322a can be arc-shaped, and the trajectory surface a 1325 can form a plane, and the gas pump 12 can perform gas output on the trajectory surface a 1325.

[0044] Reference Figure 5 In some embodiments, the stirring piece 132 includes a guide portion 1321 and a parabolic portion 1322 connected to the guide portion 1321, the parabolic portion 1322 is provided with a parabolic groove 1322a, and the parabolic portion 1322 is connected to the rotating shaft 131.

[0045] In the present embodiment, the guide portion 1321 is provided with a sharp end, which is arranged at one end of the guide portion 1321 away from the parabolic portion 1322, so as to guide the flow of the hot melt adhesive and ensure the flow path of the hot melt adhesive in the container 11. Through the combined design of the guide portion 1321 and the parabolic portion 1322, the stirring efficiency can be improved. The guide portion 1321 guides the hot melt adhesive to flow into the parabolic groove 1322a, and the movement of the parabolic portion 1322 effectively stirs and mixes the hot melt adhesive.

[0046] In some embodiments, the stirring assembly 13 includes a first stirring piece 1326 and a second stirring piece 1327, the first stirring piece 1326 and the second stirring piece 1327 have the same shape, the rotating shaft 131 is connected to the first stirring piece 1326, the first stirring piece 1326 is connected to the second stirring piece 1327, and the second stirring piece 1327 is connected to the rotating shaft 131. Specifically, the first stirring piece 1326 includes a first guide portion and a first parabolic portion, the second stirring piece 1327 includes a second guide portion and a second parabolic portion, and the first parabolic portion is connected to the second parabolic portion.

[0047] In the embodiment, the first stirring member 1326 and the second stirring member 1327 are oppositely arranged, i.e., both are fixedly connected to one end of the rotating shaft 131, and the first stirring member 1326 and the second stirring member 1327 can move in a mutually symmetrical manner during stirring. In other words, the opposite arrangement means that the first stirring member 1326 and the second stirring member 1327 are both fixedly connected to one end of the rotating shaft 131 and are connected to each other through a connecting structure. Such opposite arrangement enables the two stirring members 132 to move according to a mutually symmetrical manner, thereby achieving a more uniform mixing effect. By arranging two stirring members 132 of the same shape, the stirring movement of the two stirring members 132 can be performed simultaneously during stirring. In this way, the hot melt adhesive can be more fully mixed to achieve a more uniform state. In other words, when the rotating shaft 131 rotates the first stirring member 1326, the first stirring member 1326 and the second stirring member 1327 move synchronously through the connecting structure. Since the two stirring members 132 are of the same shape, they produce similar stirring effects and flow paths during stirring. In this way, the hot melt adhesive can flow back and forth between the two stirring members 132 and be fully mixed during stirring, thereby enabling the bubbles to be uniformly mixed in the hot melt adhesive.

[0048] Reference Figure 3 and Figure 6 In some embodiments, the hot melt adhesive stirring device 10 comprises an application assembly 14 arranged at the end of the container 11 away from the air pump 12, and the application assembly 14 is used to apply hot melt adhesive to the interface that needs to be bonded.

[0049] Specifically, the application assembly 14 comprises a housing 141 and a rolling member 142, the housing 141 is communicated to the end of the container 11 away from the air pump 12, and the rolling member 142 is rotatably connected to the end of the housing 141 away from the container 11. The housing 141 can be a cylinder, and the container 11 is provided with an adhesive outlet, and the housing 141 is communicated to the adhesive outlet. The rolling member 142 can be a sphere, and the housing 141 is sleeved on the rolling member 142, so that the rolling member 142 is rotatably connected to the housing 141. Such a structure enables the hot melt adhesive to be applied from the adhesive outlet in the container 11 to the interface that needs to be bonded through the rotation of the housing 141 and the rolling member 142. The rotation of the rolling member 142 can uniformly apply the hot melt adhesive to the interface, ensuring the uniformity and stability of the bonding effect. The position of the application assembly 14 is away from the air pump 12 to avoid interference of the air pump 12 with the application process, thereby better controlling the process and quality of the application.

[0050] Specifically, the shell 141 includes a support part 1411 and a cleaning part 1412 connected to the support part 1411, and the rolling member 142 is rotationally connected to the cleaning part 1412, and the support part 1411 is connected to the container 11. Due to the viscosity of hot melt adhesive, the rolling member 142 may accumulate hot melt adhesive residues during the application process. The design of the cleaning part 1412 can remove the remaining hot melt adhesive by contacting and cleaning the surface of the rolling member 142. This helps to prevent the accumulation of hot melt adhesive residues during the application process, ensuring the quality and effect of the application. The function of the cleaning part 1412 is to maintain the cleanliness of the rolling member 142, preventing any contaminants or foreign matter from adhering to the surface of the rolling member 142. This helps to avoid contamination of the hot melt adhesive, maintains the purity of the application, and ensures the quality of the bonding interface. Secondly, by regularly cleaning the rolling member 142, it can ensure that the surface of the rolling member 142 remains smooth and clean, reducing any interference of impurities in the application process. This can improve the uniformity and stability of the application, thereby improving the application quality of the hot melt adhesive on the bonding interface.

[0051] Specifically, the application assembly 14 includes an elastic member 143, which is provided in the support part 1411, one end of the elastic member 143 is rotationally connected to the rolling member 142, and the other end is connected to the container 11. The elastic member 143 can be a spring or a silicone rubber part with elasticity, and the presence of the elastic member 143 can ensure that the rolling member 142 maintains uniform contact pressure with the application plane. This helps to achieve uniform application of hot melt adhesive, allowing it to form a consistent thickness on the interface that needs to be bonded. This can improve the reliability and consistency of bonding. Through the pressure action of the elastic member 143, it can ensure that the rolling member 142 fully contacts and compacts the application plane. This helps to eliminate any air bubbles or voids that may exist, allowing the hot melt adhesive to be more uniformly distributed during the application process and promoting good bonding with the interface. Secondly, the design of the elastic member 143 can be adjusted as needed to adapt to different application materials or application thickness requirements. By adjusting the strength or pressure of the elastic member 143, control and adjustment of the application process can be achieved to meet specific application requirements.

[0052] In some embodiments, the hot melt adhesive stirring device 10 includes a heating member (not labeled in the figure) fixedly connected to the container 11 for heating with the hot melt adhesive stirring device 10. The heating member can be a heating plate that can heat the application device or the container 11. When the application device is not used for a long time, the hot melt adhesive left on the surface of the rolling member 142 may solidify, at which time the heating plate is started to heat the application device to allow the rolling member 142 to rotate. Secondly, during stirring, the heating plate can heat the container 11 to maintain the fluidity of the hot melt adhesive, thereby allowing the stirring and mixing to be more thorough, achieving the purpose of reducing the viscosity of the hot melt adhesive.

[0053] Therefore, the hot melt adhesive stirring device 10 is disclosed, which comprises a container 11, a gas pump 12 and a stirring assembly 13. The container 11 is used for containing hot melt adhesive. The gas pump 12 is arranged on the container 11 and used for blowing gas to the hot melt adhesive to generate bubbles in the hot melt adhesive. The stirring assembly 13 divides the container 11 into a gas blowing area 13a and a stirring area 13b. The stirring assembly 13 comprises a rotating shaft 131 and a stirring piece 132. The rotating shaft 131 is arranged in the container 11. The stirring piece 132 is connected to one end of the rotating shaft 131 away from the container 11. The stirring piece 132 is provided with a parabolic groove 1322a which is recessed towards the axis of the rotating shaft 131. The parabolic groove 1322a is used for throwing the hot melt adhesive from the stirring area 13b to the gas blowing area 13a. The gas pump 12 is arranged in the gas blowing area 13a. The trajectory of the hot melt adhesive from the parabolic groove 1322a to the gas blowing area 13a is recorded as a first trajectory. The gas blowing trajectory of the gas pump 12 is recorded as a second trajectory. The first trajectory and the second trajectory intersect.

[0054] Firstly, when the hot melt adhesive is thrown from the parabolic groove 1322a to the gas blowing area 13a, it intersects with the gas blowing trajectory of the gas pump 12. This intersection causes the collision between the gas and the hot melt adhesive, generating bubbles. The formation of bubbles helps to reduce the viscosity of the hot melt adhesive, because the existence of bubbles introduces voids in the hot melt adhesive, reducing the intermolecular interaction force, making the hot melt adhesive flow more easily. Secondly, the intersecting first trajectory and second trajectory can promote the effective mixing of the hot melt adhesive between the stirring area 13b and the gas blowing area 13a. When the hot melt adhesive is thrown to the gas blowing area 13a, it will also mix with the surrounding hot melt adhesive while intersecting with the gas blowing trajectory of the gas pump 12. This mixing effect can uniformly disperse the bubbles in the hot melt adhesive in the entire coating area, thereby improving the uniformity and consistency of the coating. Moreover, the viscosity of the hot melt adhesive refers to the degree of resistance to flow. The intersecting first trajectory and second trajectory cause the interaction between the gas and the hot melt adhesive, causing the formation of bubbles and the stirring of the hot melt adhesive. This action can destroy the molecular structure of the hot melt adhesive, reduce the intermolecular attraction, thereby reducing the viscosity of the hot melt adhesive. Reducing the viscosity of the hot melt adhesive helps to increase its flowability, making it easier to penetrate into small pores or fibers, and improving the permeability and coverage of the coating.

[0055] The technical features of the above-described embodiments can be combined in any manner. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, but as long as the combinations of the technical features do not exist contradictions, they should be considered as the scope of the present disclosure.

[0056] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the patent. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, several modifications and improvements can be made, which are within the scope of protection of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A hot melt adhesive mixing device, characterized in that, include: Containers used to hold hot melt adhesive; An air pump, located on the container, is used to vent air from the hot melt adhesive to generate bubbles inside the hot melt adhesive; A stirring assembly divides the container into a gas outlet zone and a stirring zone. The stirring assembly is located inside the container and includes a rotating shaft and a stirring element. One end of the rotating shaft is connected to the inside of the container, and the other end is connected to the stirring element. The stirring element is provided with a parabolic trough, which is recessed towards the axis of the rotating shaft. The parabolic trough is used to throw hot melt adhesive from the stirring zone to the gas outlet zone. An air pump is located in the gas outlet zone. The trajectory of the hot melt adhesive from the parabolic trough to the gas outlet zone is recorded as a first trajectory, and the gas outlet trajectory of the air pump is recorded as a second trajectory. The first trajectory and the second trajectory intersect. The cross-sectional shape of the parabolic trough is right-angled, and when viewed along the axial direction of the rotation axis, the first trajectory is a planar parabola.

2. The hot melt adhesive mixing device according to claim 1, characterized in that, The hot melt adhesive mixing device also includes a sensor located inside the container. The sensor is used to detect the trajectory of the hot melt adhesive from the parabolic trough to the venting zone. When viewed along the axis of the rotation shaft, the inner wall of the parabolic trough has a closest end and a farthest end from the axis of the rotation shaft. The trajectory of the hot melt adhesive from the closest end to the venting zone is denoted as the first curve, and the trajectory of the hot melt adhesive from the farthest end to the venting zone is denoted as the second curve. The trajectory surface is the interval between the first curve and the second curve.

3. The hot melt adhesive mixing device according to claim 2, characterized in that, The hot melt adhesive mixing device includes a controller disposed on the outer wall of the container. The sensor and the air pump are electrically connected to the controller. The air pump has an air outlet with a first boundary and a second boundary. The first boundary and the second boundary form a second trajectory. The controller is used to control the position of the first boundary and the second boundary. The extension line of the first boundary intersects the first curve, and the extension line of the second boundary intersects the second curve.

4. The hot melt adhesive mixing device according to claim 1, characterized in that, The stirring component includes a guide portion and a parabolic portion connected to the guide portion. The parabolic portion has a parabolic groove and is connected to the rotating shaft.

5. The hot melt adhesive mixing device according to claim 1, characterized in that, The stirring assembly includes a first stirring element and a second stirring element, the rotating shaft is connected to the first stirring element, the first stirring element is connected to the second stirring element, and the second stirring element is connected to the rotating shaft.

6. The hot melt adhesive mixing device according to claim 5, characterized in that, The first stirring component includes a first guide portion and a first parabolic portion, and the second stirring component includes a second guide portion and a second parabolic portion, wherein the first parabolic portion is connected to the second parabolic portion.

7. The hot melt adhesive mixing device according to claim 1, characterized in that, The hot melt adhesive mixing device includes a coating component, which is located at the end of the container away from the air pump. The coating component is used to apply hot melt adhesive to the interface that needs to be bonded.

8. The hot melt adhesive mixing device according to claim 7, characterized in that, The application assembly includes a housing and a roller, the housing being connected to the end of the container away from the air pump, and the roller being rotatably connected to the end of the housing away from the container.

9. The hot melt adhesive mixing device according to claim 8, characterized in that, The housing includes a support portion and a cleaning portion connected to the support portion, the rolling element is rotatably connected to the cleaning portion, and the support portion is connected to the container.

Images