Hot melt adhesive particle drying and screening integrated machine

Abstract

The present application relates to the field of plastic forming post-processing, and discloses a hot melt adhesive particle drying and screening integrated machine, which comprises a shell, a feeding port is arranged on the top side of the shell, a first discharging port is arranged on the bottom side of the shell, an annular partition plate is connected to the inner wall of the shell, a second discharging port is arranged on the outer side of the shell above the annular partition plate, a screening mechanism, a rotating device and a screening barrel, the rotating device is drivingly connected to the screening barrel, the screening barrel is rotationally connected to the inner top side of the shell, a plurality of screening holes are arranged on the side wall of the screening barrel, a bottom plate capable of opening or closing the screening barrel is arranged on the bottom side of the screening barrel, and the bottom side of the screening barrel is rotationally connected to the inner side of the annular partition plate, a blowing mechanism, an airflow can be formed in the screening barrel and directed to the side wall of the screening barrel, and a dispersing mechanism is arranged on the inner top side of the shell, the present application saves the processing time of the hot melt adhesive particles, improves the drying and screening efficiency of the hot melt adhesive particles, and effectively prevents the clogging caused by the screening of the hot melt adhesive particles.

Description

Technical Field

[0001] This invention relates to the field of post-processing of plastic molding and discloses an integrated machine for drying and screening hot melt adhesive granules. Background Technology

[0002] After being granulated and water-cooled, hot melt adhesive granules need to be dried and sieved. Currently, this involves feeding the granules into a hot air blower to remove surface moisture, followed by sieving in a vibrating screen. The vibrating screen is then equipped with a hot air drying unit to further dry the granules. This process requires multiple transfer devices, necessitating a large amount of equipment and floor space. Furthermore, the hot air blower is ineffective at removing moisture from the hot melt adhesive granules, causing them to easily stick together and clog the vibrating screen, resulting in poor sieving efficiency. Therefore, there is an urgent need for a device that can better dry and sieve hot melt adhesive granules. Summary of the Invention

[0003] The purpose of this invention is to provide an integrated drying and screening machine for hot melt adhesive particles, so as to solve one or more technical problems existing in the prior art, and at least provide a beneficial option or create conditions.

[0004] According to a first aspect of the present invention, a hot melt adhesive particle drying and screening integrated machine includes: a shell, with a feed inlet on the top side and a first discharge outlet on the bottom side; an annular partition is connected to the inner wall of the shell, and a second discharge outlet is provided on the outer side of the shell above the annular partition; and a screening mechanism including a rotating device and a screening barrel, wherein the rotating device is disposed on the shell and is throttle-connected to the screening barrel, the screening barrel being rotatably connected to the inner top side of the shell, and the top side of the screening barrel is directly opposite the feed inlet. The sieve has an upper opening and multiple sieve holes on its side wall. A bottom plate is provided on the bottom side of the sieve, allowing it to be opened or closed. The bottom side of the sieve is rotatably connected to the inner side of the annular partition. An air blowing mechanism is located on the bottom plate, which generates an airflow towards the side wall of the sieve. A dispersion mechanism is located on the top side of the outer casing, forming a dispersion surface below the upper opening. This dispersion surface extends downwards at an angle towards the side wall of the sieve.

[0005] This technical solution has at least the following beneficial effects: Water-cooled hot melt adhesive granules are fed into a screening barrel through the inlet. At this time, the bottom plate of the screening barrel is closed. After entering the screening barrel, the hot melt adhesive granules fall into the dispersion surface below the upper opening. The inclined dispersion surface guides the hot melt adhesive granules, causing them to fall onto the side wall of the screening barrel. Due to the rotation of the screening barrel by the rotating device, the hot melt adhesive granules inside the screening barrel experience centrifugal force. Under the action of gravity, the hot melt adhesive granules gradually move downwards, slowly moving downwards along the inner wall of the screening barrel. The hot melt adhesive particles are spread out, allowing smaller particles to pass directly through the screening holes on the side wall of the screening barrel and enter the upper cavity formed by the outer side of the screening barrel, the inner side of the outer shell, and the top side of the annular partition. This effectively ensures the screening effect as the hot melt adhesive particles move relative to each other along the side wall of the screening barrel. During this process, centrifugal force can also be used to remove moisture from the hot melt adhesive particles, achieving preliminary drying. Because the air blowing mechanism creates an airflow towards the side wall of the screening barrel, as the hot melt adhesive particles gradually move down to the air blowing mechanism, the airflow can blow the hot melt adhesive particles near the middle of the screening barrel back to be close to the side of the screening barrel. Since the hot melt adhesive particles have already been preliminarily dried and dehydrated, the airflow can provide upward lift to the particles, causing them to be thrown back onto the side wall of the screening barrel. The airflow blowing onto the particles also achieves a drying effect. After screening, smaller particles in the upper cavity can be discharged from the second outlet. When the bottom plate of the screening barrel is opened, hot melt adhesive particles of the required size can fall from the bottom of the barrel to the bottom of the outer shell and be discharged outwards from the first outlet. This process of throwing hot melt adhesive particles onto the screening barrel via airflow is repeated. The sidewall not only dries the hot melt adhesive particles but also, in conjunction with the centrifugal force provided by the rotating screening drum and the gravity of the particles themselves, gradually spreads them downwards along the sidewall, thus achieving screening of the hot melt adhesive particles. This allows for direct drying and screening of water-cooled hot melt adhesive particles within the same equipment, reducing the need for transferring the particles, saving processing time, improving the efficiency of drying and screening, and effectively preventing clogging during screening. This also enhances the stability and reliability of long-term processing of hot melt adhesive particles.

[0006] According to some embodiments of the present invention, the dispersing mechanism includes a fixed frame and a fixed column connected to the bottom side of the fixed frame. The dispersing surface is formed on the top surface of the fixed column. The bottom plate is provided with a through hole corresponding to the position of the fixed column. An opening and closing driving member is connected to the bottom side of the annular partition. The opening and closing driving member is connected to the bottom plate. The opening and closing driving member drives the bottom plate to move upward against the bottom side of the annular partition, so that the bottom end of the fixed column blocks the through hole. Alternatively, the opening and closing driving member drives the bottom plate downward away from the annular partition and the fixed column.

[0007] According to some embodiments of the present invention, an annular air guide surface is formed on the outer side of the fixed column, the annular air guide surface extends from bottom to top in a direction away from the axis of the fixed column, and the blowing mechanism is provided with an air outlet end on the base plate near the annular air guide surface, and multiple air outlet ends are provided around the annular air guide surface.

[0008] According to some embodiments of the present invention, the base plate is formed with a confluence section, the inner diameter of which gradually decreases from top to bottom.

[0009] According to some embodiments of the present invention, the air blowing mechanism includes a jacket disposed on the bottom side of the base plate and a plurality of air outlets disposed on the base plate. The jacket extends around the through hole, and an annular air cavity is formed between the jacket and the base plate. The plurality of air outlets respectively form the air outlet end, and an air receiving head communicating with the annular air cavity is disposed on the outside of the jacket.

[0010] According to some embodiments of the present invention, the dispersing surface extends around the fixed column, and the vertical cross-sectional shape of the dispersing surface is arc-shaped.

[0011] According to some embodiments of the present invention, a heating source is provided inside the fixed column, and the heating source is used to heat the side wall of the fixed column.

[0012] According to some embodiments of the present invention, a recycling pipe is provided on the outer side of the outer shell, the recycling pipe extends around the outer shell, the first discharge port is provided on both sides of the outer shell, the two ends of the recycling pipe are respectively connected to the two first discharge ports, and a recycling fan is connected to the middle of the recycling pipe.

[0013] According to some embodiments of the present invention, the present invention further includes a transfer hopper, a conveying pipe and a water collection tank, one end of the conveying pipe being connected to the feed inlet, the transfer hopper being connected to the top side of the end of the conveying pipe away from the feed inlet, the water collection tank being connected to the bottom side of the end of the conveying pipe away from the feed inlet, a partition net being provided at the position where the conveying pipe is connected to the water collection tank, and a conveying device for feeding material to the feed inlet being provided inside the conveying pipe.

[0014] According to some embodiments of the present invention, the conveying pipe is inclined downward from the feed inlet toward the water collection tank.

[0015] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly explained below. Obviously, the described drawings are only a part of the embodiments of the present invention, and not all of them. Those skilled in the art can obtain other design schemes and drawings based on these drawings without creative effort.

[0017] Figure 1 This is an overall front view of the present invention.

[0018] Figure 2 This is a schematic diagram of the overall internal structure of the present invention.

[0019] Figure 3 yes Figure 2 A magnified view of part A.

[0020] In the attached diagram: 100-outer shell, 110-feed inlet, 120-first outlet, 130-annular partition, 150-second outlet, 161-fixed frame, 162-fixed column, 163-dispersion surface, 170-heating source, 181-recovery pipe, 182-recovery fan, 210-rotating device, 220-screening barrel, 221-drying section, 222-transition section, 223-screening section, 230-bottom plate, 231-through hole, 240-opening and closing drive component, 310-jacket, 320-air outlet, 330-air inlet, 410-transfer hopper, 420-conveying pipe, 430-water collection tank, 440-conveying device. Detailed Implementation

[0021] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0022] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0023] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0024] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0025] In the description of this application, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0026] In the description of this application, the use of terms such as "one embodiment," "some embodiments," "an example," "some instances," "some embodiments," "illustrative embodiment," "example," "specific example," and "some examples" indicates that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0027] Reference Figure 1 and Figure 2According to a first aspect embodiment of the present invention, a hot melt adhesive particle drying and screening integrated machine includes a housing 100, a screening mechanism, and an air blowing mechanism. A feed inlet 110 is provided on the top side of the housing 100, a first discharge outlet 120 is provided on the bottom side of the housing 100, an annular partition 130 is connected to the inner wall of the housing 100, and a second discharge outlet 150 is provided on the outer side of the housing 100 above the annular partition 130. In practical applications, a switch valve is respectively provided at the feed inlet 110, the first discharge outlet 120, and the second discharge outlet 150 to independently control the opening and closing of the feed inlet 110, the first discharge outlet 120, and the second discharge outlet 150. The screening mechanism includes a rotating device 210 and a screening drum 220. The rotating device 210 is disposed on the housing 100 and is drively connected to the screening drum 220. The rotating device 210 can... A motor drives the screening barrel 220 to rotate via gears and a gear ring. The screening barrel 220 is rotatably connected to the inner top side of the outer shell 100. The top side of the screening barrel 220 has an upper opening opposite the feed inlet 110. The side wall of the screening barrel 220 has multiple screening holes. The bottom side of the screening barrel 220 has a bottom plate 230 that can be opened or closed. The bottom side of the screening barrel 220 is rotatably connected to the inner side of the annular partition 130. An air blowing mechanism is provided on the bottom plate 230, which can generate an airflow towards the side wall of the screening barrel 220. A dispersion mechanism is provided on the inner top side of the outer shell 100. The dispersion mechanism has a dispersion surface 163 located below the upper opening. The dispersion surface 163 extends downward at an angle towards the side wall of the screening barrel 220.

[0028] As described above, the water-cooled hot melt adhesive granules are fed into the screening tank 220 through the feed inlet 110. At this time, the bottom plate 230 on the bottom side of the screening tank 220 is closed. After entering the screening tank 220, the hot melt adhesive granules fall into the dispersion surface 163 below the upper opening. The inclined dispersion surface 163 guides the hot melt adhesive granules, causing them to fall onto the side wall of the screening tank 220. Due to the rotation of the rotating device 210, the screening tank 220 rotates, causing the hot melt adhesive granules in the screening tank 220 to have centrifugal force. Under the action of gravity, the hot melt adhesive granules in the screening tank 220 gradually move downwards, thus concentrating the hot melt adhesive granules within the screening tank 220. The wall slowly moves downwards and spreads out, allowing smaller hot melt adhesive particles to pass directly through the screening holes on the side wall of the screening barrel 220 and enter the upper cavity formed by the outer side of the screening barrel 220, the inner side of the outer shell 100, and the top side of the annular partition 130. This effectively ensures the screening effect when the hot melt adhesive particles move relative to each other along the side wall of the screening barrel 220. During this process, centrifugal force can also be used to throw out the moisture from the hot melt adhesive particles, achieving preliminary drying. Because the air blowing mechanism forms an airflow towards the side wall of the screening barrel 220 inside the screening barrel 220, when the hot melt adhesive particles gradually move downwards to the air blowing mechanism, the airflow can re-pick up the hot melt adhesive particles near the middle of the screening barrel 220. The airflow is blown close to the side wall of the screening barrel 220. Since the hot melt adhesive particles have been initially dried, the airflow can provide upward lift to the particles, causing them to be thrown back to the side wall of the screening barrel 220. The airflow also dries the hot melt adhesive particles. After screening, smaller particles in the upper cavity can be discharged from the second outlet 150. When the bottom plate 230 of the screening barrel 220 is opened, hot melt adhesive particles of the required size can fall from the bottom of the screening barrel 220 to the bottom of the outer shell 100 and be discharged outwards from the first outlet 120. This process is achieved through airflow. The hot melt adhesive granules are thrown onto the side wall of the screening drum 220, which not only dries the granules but also allows them to gradually spread downwards along the side wall of the drum due to the centrifugal force provided by the rotation of the screening drum 220 and the gravity of the granules themselves. This achieves sieving of the hot melt adhesive granules, allowing for direct drying and sieving of water-cooled hot melt adhesive granules within the same equipment. This reduces the need for transferring the granules, saves processing time, improves the efficiency of drying and sieving, and effectively prevents clogging during sieving, thus enhancing the stability and reliability of long-term processing of hot melt adhesive granules.

[0029] Therefore, when using this integrated hot melt adhesive particle drying and screening machine, in the initial stage of rotating and screening the hot melt adhesive particles, the rotation speed of the screening drum 220 can be increased to give the hot melt adhesive particles a greater centrifugal force, which will cause the water on the surface of the hot melt adhesive particles to be thrown off. Then, the rotation speed of the rotating device 210 driving the screening drum 220 to rotate is reduced, so that the hot melt adhesive particles obtain a centrifugal force less than gravity. This causes the hot melt adhesive particles to gradually spread downward on the inner side wall of the screening drum 220. When the hot melt adhesive particles move relative to the inner side wall of the screening drum 220, they pass through multiple screening holes on the side wall of the screening drum 220, and the smaller hot melt adhesive particles are discharged from the screening holes outward from the screening drum 220.

[0030] Furthermore, in order to improve the drying and screening effect of hot melt adhesive particles in the screening barrel 220, in this embodiment, the side wall of the screening barrel 220 is formed with a drying section 221, a transition section 222 and a screening section 223 connected sequentially from top to bottom. The drying section 221 extends vertically, the transition section 222 is inclined downward towards the center of the screening barrel 220, and the screening section 223 is arched in an arc shape towards the center of the screening barrel 220. Multiple water passage holes are respectively provided on the drying section 221 and the transition section 222, and multiple screening holes are formed on the screening section 223. The diameter of the water passage holes is smaller than that of the screening holes. The rotating device 210 controls the screening barrel 220 to first rotate continuously at a first speed for a set time, and then rotate continuously at a second speed for a set time. The first speed is greater than the second speed. During operation, hot melt adhesive particles are propelled by airflow to the top of the screening drum 220, entering the area formed by the drying section 221 and the transition section 222. The inclined transition section 222 effectively slows down the falling speed of the hot melt adhesive particles. Due to the small size of the water passages on the drying section 221 and the transition section 222, the hot melt adhesive particles cannot pass through. At this time, the screening drum 220 rotates at a high initial speed to fling the water off the hot melt adhesive particles, achieving the main spin-drying function. Then, the screening drum 220 reduces its speed to a second speed. As the device rotates, the centrifugal force on the hot melt adhesive particles is less than the gravitational force. The hot melt adhesive particles can gradually pass through multiple screening holes on the screening section 223 from the transition section 222 downwards. Since the screening section 223 is arc-shaped, it can better catch the hot melt adhesive particles falling downwards and increase the travel distance of the hot melt adhesive particles through the screening section 223, thereby achieving screening and further drying on the screening section 223. In this way, through variable speed dynamic screening, combined with the structure of the screening barrel 220, more efficient drying and screening of hot melt adhesive particles can be achieved.

[0031] In a further embodiment where the bottom plate 230 opens or closes the bottom side of the screening barrel 220, such as Figure 3As shown, the dispersing mechanism includes a fixed frame 161 and a fixed column 162 connected to the bottom side of the fixed frame 161. The dispersing surface 163 is formed on the top surface of the fixed column 162. The bottom plate 230 is provided with a through hole 231 corresponding to the position of the fixed column 162. The bottom side of the annular partition 130 is connected to an opening and closing drive member 240. The opening and closing drive member 240 is connected to the bottom plate 230. The opening and closing drive member 240 drives the bottom plate 230 to abut against the bottom side of the annular partition 130, so that the bottom end of the fixed column 162 blocks the through hole 231. Hole 231, or the opening and closing drive component 240 drives the base plate 230 downward away from the annular partition 130 and the fixed column 162. In practical applications, the opening and closing drive component 240 can be a cylinder, electric screw or hydraulic cylinder, etc., to drive the base plate 230 to move up and down. The number of opening and closing drive components 240 can be one or more. For example, opening and closing drive components 240 are respectively provided on both sides of the annular partition 130. At this time, the two sides of the base plate 230 provide driving force for the base plate 230 to move up and down, improving the stability of the movement of the base plate 230. When the bottom of the screening barrel 220 needs to be opened, the opening and closing drive 240 drives the bottom plate 230 downward away from the annular partition 130 and the fixed column 162. At this time, the hot melt adhesive particles in the screening barrel 220 can fall downward from the outer edge of the bottom plate 230 and the through hole 231 to the bottom of the outer shell 100. Finally, the screened hot melt adhesive particles are discharged from the first discharge port 120 on the bottom side of the outer shell 100. When the bottom of the screening barrel 220 needs to be closed, the opening and closing drive 240 drives the bottom plate 230 downward, so that the outer edge of the bottom plate 230 abuts against the bottom side of the annular partition 130. At this time, the bottom end of the fixed column 162 also abuts against the through hole 231 of the bottom plate 230, blocking and sealing the through hole 231. The hot melt adhesive particles can be filled into the screening barrel 220.

[0032] The air blowing mechanism can be positioned with the air outlet facing the side wall of the screening barrel 220, thereby blowing the hot melt adhesive particles toward the side wall of the screening barrel 220. In order to better achieve the effect of throwing the hot melt adhesive particles toward the side wall of the screening barrel 220, in this embodiment, an annular air guide surface is formed on the outer side of the fixed column 162. The annular air guide surface extends from bottom to top in a direction away from the axis of the fixed column 162. The air blowing mechanism is provided with an air outlet on the base plate 230 near the annular air guide surface, and multiple air outlets are arranged around the annular air guide surface. Multiple air outlets blow air upwards near the annular air guide surface, pushing the hot melt adhesive particles upwards to the annular air guide surface. At this time, the hot melt adhesive particles move in a parabolic trajectory towards the side wall of the screening barrel 220 along the guide surface of the annular air guide surface, which helps to guide the airflow and form an airflow towards the side wall of the screening barrel 220. This reduces the splashing of hot melt adhesive particles when they reach the side wall of the screening barrel 220, and blows small hot melt adhesive particles such as dust outwards from the screening holes.

[0033] To improve the downward discharge of hot melt adhesive particles from the bottom plate 230 as it leaves the screening barrel 220, in this embodiment, the bottom plate 230 has a confluence section with an inner diameter that gradually decreases from top to bottom. When the screening and drying of the hot melt adhesive particles stops, the particles converge at the through-hole 231 of the bottom plate 230 within the confluence section. When the bottom plate 230 leaves the screening barrel 220, the hot melt adhesive particles can be quickly discharged downwards from the through-hole 231, thus accelerating material flow and improving overall work efficiency. Furthermore, the inclined confluence section also facilitates airflow guidance. Combined with the annular air guide surface, this guides the airflow, creating a circulating airflow within the area between the fixed column 162 and the screening barrel 220, which is beneficial for the circulating screening of hot melt adhesive particles within the screening barrel 220.

[0034] As a specific implementation of the air blowing mechanism, the air blowing mechanism includes a jacket 310 disposed on the bottom side of the base plate 230 and a plurality of air outlets 320 disposed on the base plate 230. The jacket 310 extends around the through hole 231, and an annular air cavity is formed between the jacket 310 and the base plate 230. The plurality of air outlets 320 respectively form the air outlet ends. An air receiving head 330 communicating with the annular air cavity is disposed on the outside of the jacket 310. In use, the air receiving head 330 is connected to an external fan or air tank, etc., and airflow is sent into the annular air cavity through the air receiving head 330, and air is blown into the screening barrel 220 from the plurality of air outlets 320 to realize the blowing, throwing and drying of hot melt adhesive particles.

[0035] To further improve the screening effect of hot melt adhesive particles through the side wall of the screening barrel 220, multiple air outlets 320 are inclined, that is, they form an angle with the vertical. At this time, the multiple air outlets 320 form a rotating upward airflow around the annular air guide surface, which provides both radial external force along the annular air guide surface and circumferential external force to the hot melt adhesive particles when they are thrown.

[0036] The dispersing surface 163 can be an inclined plane. In this case, multiple interconnected dispersing surfaces 163 are arranged around the outside of the fixed column 162. In this embodiment, the dispersing surface 163 extends around the fixed column 162, and the vertical cross-sectional shape of the dispersing surface 163 is arc-shaped. The top of the fixed column 162, which gradually narrows upward, forms a conical structure. When hot melt adhesive particles fall, it can reduce the residence time of the hot melt adhesive particles at the top of the fixed column 162 and better disperse the hot melt adhesive particles in all directions, thereby improving the uniformity of the distribution of hot melt adhesive particles in the screening tank 220 when feeding.

[0037] To further improve the drying effect on hot melt adhesive particles, in this embodiment, a heating source 170 is provided inside the fixing column 162. The heating source 170 is used to heat the side wall of the fixing column 162. The heating source 170 can be an electric heating element such as a PTC heating tube, a heating film, or an electric heating wire. When the airflow and hot melt adhesive particles flow along the annular air guide surface, the side wall of the fixing column 162 can heat the airflow and heat and dry the surface of the hot melt adhesive particles. This cleverly increases the heating time of the airflow and hot melt adhesive particles, and drying can be achieved more quickly.

[0038] To promptly remove dust and humid air outside the screening chamber 220, in this embodiment, a recovery pipe 181 is provided on the outer side of the outer shell 100. The recovery pipe 181 extends around the outer shell 100, and first discharge ports 120 are respectively provided on both sides of the outer shell 100. The two ends of the recovery pipe 181 are respectively connected to the two first discharge ports 120, and a recovery fan 182 is connected to the middle of the recovery pipe 181. The recovery fan 182 provides negative pressure to the inside of the recovery pipe 181, drawing air from both sides of the outer shell 100 through the two ends of the recovery pipe 181, thereby more efficiently adsorbing and recovering air from the inside of the outer shell 100.

[0039] In practical applications, the recovery fan 182 can be connected to the heat exchanger to transfer heat to the pipeline of the air inlet 330, thereby realizing the recovery and utilization of heat and reducing the overall energy consumption.

[0040] After water cooling molding, the hot melt adhesive particles have a lot of moisture on their surface. Traditional processing methods directly feed them into a hot air blower without pre-treatment. To further improve the drying effect of the hot melt adhesive particles, this invention also includes a transfer hopper 410, a conveying pipe 420, and a water collection tank 430. One end of the conveying pipe 420 is connected to the feed inlet 110. The transfer hopper 410 is connected to the top side of the end of the conveying pipe 420 away from the feed inlet 110. The water collection tank 430 is connected to the bottom side of the end of the conveying pipe 420 away from the feed inlet 110. A mesh is provided at the position where the conveying pipe 420 is connected to the water collection tank 430. A conveying device 440 is provided inside the conveying pipe 420 to feed the hot melt adhesive particles to the feed inlet 110. The conveying device 440 can be a screw conveyor to push the hot melt adhesive particles inside the conveying pipe 420 towards the feed inlet 110. After water cooling and molding, the hot melt adhesive granules are fed into the transfer silo 410 for temporary storage. The transfer silo 410 provides a drainage function for the hot melt adhesive granules, allowing water on the surface of the granules to collect and drip onto the screen. The water then enters the water collection tank 430 for recycling. After a set set time of stillness, the conveying device 440 feeds the hot melt adhesive granules from the conveying pipe 420 into the feed inlet 110. This pretreatment of the hot melt adhesive granules effectively reduces the water content when they enter the screening tank 220, improving the overall processing efficiency. Furthermore, it cleverly coordinates with the processing time of the hot melt adhesive granules in the screening tank 220, achieving a buffering function within the transfer silo 410.

[0041] To improve water collection efficiency, in this embodiment, the conveying pipe 420 is inclined downward from the inlet 110 toward the water collection tank 430. In practical applications, the inclination angle of the conveying pipe 420 can be between 3 and 5 degrees, so that the inside of the conveying pipe 420 is inclined to form the effect of collecting water into the water collection tank, so that the hot melt adhesive particles located in the conveying pipe 420 can also be collected into the water collection tank when they agglomerate into water droplets.

[0042] The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A hot melt adhesive granule drying and screening integrated machine, characterized in that: include: The outer shell (100) has a feed inlet (110) on the top side and a first discharge outlet (120) on the bottom side. An annular partition (130) is connected to the inner wall of the outer shell (100). A second discharge outlet (150) is provided on the outer side of the outer shell (100) above the annular partition (130). The screening mechanism includes a rotating device (210) and a screening barrel (220). The rotating device (210) is disposed on the outer shell (100) and is connected to the screening barrel (220). The screening barrel (220) is rotatably connected to the inner top side of the outer shell (100). The top side of the screening barrel (220) has an upper opening opposite the feed inlet (110). The side wall of the screening barrel (220) is provided with a plurality of screening holes. The bottom side of the screening barrel (220) is provided with a bottom plate (230) that can open or close the screening barrel (220). The bottom side of the screening barrel (220) is rotatably connected to the inner side of the annular partition (130). An air blowing mechanism is provided on the bottom plate (230), and the air blowing mechanism can form an airflow toward the side wall of the screening barrel (220) inside the screening barrel (220); A dispersing mechanism is disposed on the top side inside the outer shell (100). The dispersing mechanism has a dispersing surface (163) located below the upper opening. The dispersing surface (163) extends downwards at an incline toward the side wall of the screening barrel (220). The dispersing mechanism includes a fixed frame (161) and a fixed column (162) connected to the bottom side of the fixed frame (161). The dispersing surface (163) is formed on the top surface of the fixed column (162). The bottom plate (230) has a through hole (231) corresponding to the position of the fixed column (162). The bottom side of the annular partition (130) is connected to an opening and closing drive member (240). The opening and closing drive member (240) is driven by the bottom plate (130). 230), the opening and closing drive (240) drives the base plate (230) to abut against the bottom side of the annular partition (130) and make the bottom end of the fixing post (162) block the through hole (231), or the opening and closing drive (240) drives the base plate (230) to move downward away from the annular partition (130) and the fixing post (162). The outer side of the fixing post (162) forms an annular air guide surface. The annular air guide surface extends from bottom to top in a direction away from the axis of the fixing post (162). The blowing mechanism is provided with an air outlet on the base plate (230) near the annular air guide surface. Multiple air outlets are provided around the annular air guide surface.

2. The integrated drying and screening machine for hot melt adhesive particles according to claim 1, characterized in that: The base plate (230) has a confluence section, the inner diameter of which gradually decreases from top to bottom.

3. The integrated drying and screening machine for hot melt adhesive particles according to claim 1, characterized in that: The air blowing mechanism includes a sleeve (310) disposed on the bottom side of the base plate (230) and a plurality of air outlets (320) disposed on the base plate (230). The sleeve (310) extends around the through hole (231), and an annular air cavity is formed between the sleeve (310) and the base plate (230). The plurality of air outlets (320) respectively form the air outlet end. An air inlet (330) communicating with the annular air cavity is disposed on the outside of the sleeve (310).

4. The integrated drying and screening machine for hot melt adhesive particles according to claim 1, characterized in that: The dispersion surface (163) extends around the fixed column (162), and the vertical cross-sectional shape of the dispersion surface (163) is arc-shaped.

5. The integrated drying and screening machine for hot melt adhesive particles according to claim 1, characterized in that: The fixed column (162) is provided with a heating source (170) inside, which is used to heat the side wall of the fixed column (162).

6. The integrated drying and screening machine for hot melt adhesive particles according to claim 1, characterized in that: A recycling pipe (181) is provided on the outside of the outer shell (100). The recycling pipe (181) extends around the outer shell (100). The first discharge port (120) is provided on both sides of the outer shell (100). The two ends of the recycling pipe (181) are respectively connected to the two first discharge ports (120). A recycling fan (182) is connected to the middle of the recycling pipe (181).

7. The integrated drying and screening machine for hot melt adhesive particles according to claim 1, characterized in that: It also includes a transfer hopper (410), a conveying pipe (420), and a water collection tank (430). One end of the conveying pipe (420) is connected to the feed inlet (110). The transfer hopper (410) is connected to the top side of the end of the conveying pipe (420) away from the feed inlet (110). The water collection tank (430) is connected to the bottom side of the end of the conveying pipe (420) away from the feed inlet (110). A mesh is provided at the position where the conveying pipe (420) is connected to the water collection tank (430). A conveying device (440) for feeding material to the feed inlet (110) is provided inside the conveying pipe (420).

8. The integrated drying and screening machine for hot melt adhesive particles according to claim 7, characterized in that: The conveying pipe (420) is inclined downward from the feed inlet (110) toward the water collection tank (430).

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