A coating mechanism for producing a hot-melt adhesive film
Patent Information
- Application Number
- CN202522383455.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-10
- Publication Date
- 2026-10-27
- Estimated Expiration
- 2035-11-10
AI Technical Summary
[0004]有鉴于此，本实用新型的目的在于提出一种生产热熔胶膜的涂布机构，以解决目前热熔胶膜的涂布机构更换挤出模具效率低的问题
[0011]本实用新型的有益效果：从上面所述可以看出，本实用新型提供的一种生产热熔胶膜的涂布机构，通过旋转调节筒集成多个涂布模具的设计，配合精密的驱动系统，实现了在不同涂布模具之间的快速、精准切换，摒弃了传统技术中必须停机、排胶、拆卸和安装模具的繁琐流程，缩短了更换模具的时间，提高了生产线的灵活性和生产效率。
Smart Images
Figure CN224894594U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of hot melt adhesive film technology, and in particular to a coating mechanism for producing hot melt adhesive film. Background Technology
[0002] Hot melt adhesive film is a special adhesive that is solid at room temperature and can be bonded by applying pressure after being heated to a molten state. In the production process of hot melt adhesive film, slot coating is the mainstream coating and molding technology. Through a precision-machined slot extrusion die, the molten hot melt adhesive is coated onto the substrate or release paper in a uniform and continuous film form. The core of the slot coating mechanism lies in its extrusion die. By precisely controlling the gap of the die lip, the melt pressure and the coating speed, high-quality adhesive film products with uniform thickness and smooth surface can be obtained.
[0003] However, in actual production, in order to meet the different customer or product requirements for film thickness, it is necessary to replace the extrusion mold with a different die lip clearance. This requires stopping the production line, emptying the entire glue supply system and the hot melt glue remaining inside the mold to prevent the glue from cooling and solidifying, causing blockage or damage. Subsequently, the operators need to disassemble the heavy mold and install a new mold. After installation, the system needs to be reheated, new hot melt glue injected, and a period of debugging is required to restore stable production. The whole process consumes a lot of time and manpower, resulting in a significant reduction in production efficiency. Utility Model Content
[0004] In view of this, the purpose of this utility model is to propose a coating mechanism for producing hot melt adhesive film, so as to solve the problem of low efficiency in changing extrusion molds in the current hot melt adhesive film coating mechanism.
[0005] To achieve the above objectives, this utility model provides a coating mechanism for producing hot melt adhesive film, comprising: A horizontal base frame, with a horizontal conveying cylinder in the middle of the horizontal base frame, a horizontal conveying groove at the bottom of the horizontal conveying cylinder, and multiple horizontal heating tubes evenly arranged around the inside of the horizontal conveying cylinder; A rotating adjusting cylinder is nested and rotatably disposed outside the horizontal conveying cylinder. The inner wall of the rotating adjusting cylinder is in contact with the outer wall of the horizontal conveying cylinder. A rotating toothed ring is arranged around the outer end of the rotating adjusting cylinder. A drive gear is meshed with the outer side of the rotating toothed ring. An adjusting motor is connected to the shaft end of the drive gear. The adjusting motor is fixedly connected to the horizontal base frame. A coating mold, multiple coating molds are evenly arranged around the outside of the rotary adjusting cylinder. An extrusion slit is provided in the middle of the coating mold and a horizontal extrusion port is provided at the bottom end of the extrusion slit. The rotary adjusting cylinder drives all coating molds to rotate synchronously and move sequentially to the bottom of the horizontal conveying trough.
[0006] Furthermore, a horizontal support shaft is provided at the center of the horizontal conveying cylinder, and spiral conveying plates are symmetrically arranged on the left and right sides of the horizontal support shaft. The spiral conveying plates are rotatably connected to the horizontal conveying cylinder through the horizontal support shaft, and a conveying motor is connected to the shaft end of the horizontal support shaft.
[0007] Furthermore, a hollow conveying pipe is provided inside the horizontal support shaft, and a conveying opening is provided at the center of the hollow conveying pipe. The hollow conveying pipe is interconnected with the interior of the horizontal conveying cylinder through the conveying opening. A rotary joint is connected to the outer end of the hollow conveying pipe, and a conveying joint is connected to the outer side of the rotary joint.
[0008] Furthermore, horizontal guide strips are symmetrically arranged on the left and right sides of the bottom end of the coating mold, and a sliding sealing plate is arranged below the horizontal extrusion port. The sliding sealing plate is horizontally slidably connected to the coating mold through the horizontal guide strips. The sliding sealing plate and the horizontal extrusion port are mutually coordinated. When the sliding sealing plate is slidably inserted into the coating mold through the horizontal guide strips, it simultaneously seals the horizontal extrusion port.
[0009] Furthermore, a horizontal guide frame is arranged parallel to the rear side of the horizontal conveying cylinder, and a horizontal traction frame is slidably connected above the horizontal guide frame. A rotating fitting groove is provided in the middle of the front side of the horizontal traction frame, and a fitting traction block is provided at the rear end of the sliding sealing plate. The fitting traction block and the rotating fitting groove are mutually fitted. When the rotating adjusting cylinder drives all coating molds to rotate synchronously to directly below the horizontal conveying trough, the fitting traction block at the rear end of the sliding sealing plate installed on the corresponding coating mold synchronously engages with the rotating fitting groove.
[0010] Furthermore, a traction screw is arranged parallel to the outer side of the horizontal guide frame, and a traction motor is connected to the shaft end of the traction screw. A traction sleeve is arranged in the middle of the horizontal traction frame, and the horizontal traction frame is connected to the traction screw through the traction sleeve.
[0011] The beneficial effects of this utility model are as follows: As can be seen from the above description, the coating mechanism for producing hot melt adhesive film provided by this utility model integrates multiple coating molds through a rotating adjusting cylinder design. Combined with a precision drive system, it realizes rapid and accurate switching between different coating molds, eliminating the cumbersome process of stopping the machine, draining glue, disassembling and installing molds in traditional technology, shortening the mold replacement time, and improving the flexibility and production efficiency of the production line. Attached Figure Description
[0012] To more clearly illustrate the technical solutions in this utility model 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 for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0013] Figure 1 This is a front structural diagram of an embodiment of the present utility model; Figure 2 This is a schematic diagram of the horizontal base frame according to an embodiment of the present utility model; Figure 3 This is a schematic diagram of the structure of the horizontal conveying cylinder according to an embodiment of the present utility model; Figure 4 This is a schematic diagram of the structure of the rotary adjusting cylinder according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the internal structure of the horizontal conveying cylinder according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of the horizontal traction frame according to an embodiment of the present utility model.
[0014] The diagram is marked as follows: 1. Horizontal base frame; 101. Horizontal conveying cylinder; 102. Horizontal conveying trough; 103. Horizontal heating pipe; 104. Drive gear; 105. Adjusting motor; 2. Horizontal support shaft; 201. Spiral conveying plate; 202. Conveying motor; 3. Hollow conveying pipe; 301. Conveying opening; 302. Rotary joint; 303. Conveying joint; 4. Rotary adjusting cylinder; 401. Rotary gear ring; 402. Coating mold; 403. Extrusion slit; 404. Horizontal extrusion port; 405. Horizontal guide bar; 5. Sliding closing plate; 501. Fitting traction block; 6. Horizontal traction frame; 601. Traction screw sleeve; 602. Rotary fitting groove; 603. Horizontal guide frame; 604. Traction screw; 605. Traction motor. Detailed Implementation
[0015] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.
[0016] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.
[0017] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, a coating mechanism for producing hot melt adhesive film includes: A horizontal base frame 1 is provided, a horizontal conveying cylinder 101 is provided in the middle of the horizontal base frame 1, a horizontal conveying groove 102 is provided at the bottom of the horizontal conveying cylinder 101, and multiple horizontal heating tubes 103 are evenly arranged around the inside of the horizontal conveying cylinder 101. A rotating adjusting cylinder 4 is nested and rotatably disposed on the outside of the horizontal conveying cylinder 101. The inner wall of the rotating adjusting cylinder 4 is in contact with the outer wall of the horizontal conveying cylinder 101. A rotating gear ring 401 is arranged around the outer end of the rotating adjusting cylinder 4. A drive gear 104 is meshed on the outer side of the rotating gear ring 401. An adjusting motor 105 is connected to the shaft end of the drive gear 104. The adjusting motor 105 is fixedly connected to the horizontal base frame 1. Coating mold 402, multiple coating molds 402 are evenly arranged around the outside of the rotating adjusting cylinder 4. An extrusion slit 403 is provided in the middle of the coating mold 402. A horizontal extrusion port 404 is provided at the bottom end of the extrusion slit 403. The rotating adjusting cylinder 4 drives all coating molds 402 to rotate synchronously and move sequentially to the bottom of the horizontal conveying trough 102.
[0018] In this embodiment, the coating mechanism pre-installs multiple coating dies 402 with different horizontal extrusion nozzle 404 sizes on the outside of the rotary regulating cylinder 4. Multiple horizontal heating tubes 103 inside the horizontal conveying cylinder 101 are activated to heat the inside of the cylinder, keeping the hot melt adhesive in a stable molten state. The molten hot melt adhesive flows through the horizontal conveying cylinder 101 under pressure and exits from the horizontal conveying groove 102 at its bottom. When a hot melt adhesive film of a specific thickness needs to be produced, the output shaft of the regulating motor 105 drives the drive gear 104 to rotate. The drive gear 104 meshes with the rotating gear ring 401 fixed to the outer end of the rotary regulating cylinder 4, thereby driving the entire rotary regulating cylinder 4 to rotate smoothly around the horizontal conveying cylinder 101. The inner wall of the rotary regulating cylinder 4 is tightly fitted to the outer wall of the horizontal conveying cylinder 101, ensuring sealing during rotation and preventing hot melt adhesive leakage. As the rotary regulating cylinder 4 rotates, all the coating dies 402 installed on it rotate synchronously. By controlling the rotation angle of the regulating motor 105, the hot melt adhesive film can be produced. The target coating mold 402 is precisely moved and positioned directly below the horizontal conveying trough 102 at the bottom of the horizontal conveying cylinder 101. At this time, the molten hot melt adhesive flowing out from the horizontal conveying trough 102 will flow into the target coating mold 402 and finally form a uniform hot melt adhesive film that meets the design requirements on the downward moving substrate through its unique extrusion slit 403 and horizontal extrusion port 404. If the adhesive film thickness needs to be changed in subsequent production, there is no need to stop the machine to empty the system. Just repeat the above steps and drive the rotary adjusting cylinder 4 to rotate again to rotate another coating mold 402 with a different horizontal extrusion port 404 size to the working position. The whole process is continuous and fast. Thus, the design of integrating multiple coating molds 402 through the rotary adjusting cylinder 4, together with the precision drive system, realizes the rapid and precise switching between different coating molds 402. It eliminates the cumbersome process of stopping the machine, emptying adhesive, disassembling and installing molds in the traditional technology, shortens the mold change time, and improves the flexibility and production efficiency of the production line.
[0019] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6As shown, preferably, the conveying motor 202 of the coating mechanism drives the horizontal support shaft 2 to rotate at a constant speed at the center of the horizontal conveying cylinder 101. The spiral conveying plates 201 fixedly installed on the left and right sides of the horizontal support shaft 2 rotate synchronously. These two symmetrically distributed spiral conveying plates 201 generate axial pushing force when rotating, which continuously and stably conveys the molten hot melt adhesive that has entered the horizontal conveying cylinder 101 to the two sides of the cylinder. At the same time, it plays an efficient role in homogenization and distribution, ensuring that the pressure and flow rate of the molten hot melt adhesive are highly uniform along the entire axial length of the horizontal conveying cylinder 101. This allows the hot melt adhesive to pass through the horizontal conveying groove 102 and enter the coating mold 402 below with a uniform flow rate, which facilitates the formation of a high-quality adhesive film with a consistent thickness.
[0020] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, preferably, the molten hot melt adhesive in the coating mechanism is first injected through a fixed conveying joint 303, which is connected to the outer fixed end of the rotary joint 302. The rotary joint 302 transfers the adhesive from the external stationary pipeline to the internal rotating component. After passing through the rotary joint 302, the adhesive enters the hollow conveying pipe 3 set inside the horizontal support shaft 2. The hollow conveying pipe 3 rotates together with the horizontal support shaft 2, but the adhesive inside it is continuously and stably input through the rotary joint 302. The adhesive flows in the hollow conveying pipe 3 and finally flows out through the conveying opening 301 set at the center of the hollow conveying pipe 3. The position of this conveying opening 301 is precisely designed in the central area of the internal space of the horizontal conveying cylinder 101, and works in conjunction with the spiral conveying plates 201 symmetrically distributed on the horizontal support shaft 2. When the spiral conveying plates 201 rotate, they can efficiently and evenly convey and distribute the adhesive flowing in from the center to both sides and the entire cavity of the horizontal conveying cylinder 101, ensuring pressure balance along the axial length and providing a solid foundation for subsequent uniform coating.
[0021] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6As shown, preferably, horizontal guide bars 405 are symmetrically fixed on both the left and right sides of the bottom end of each coating mold 402. These two guide bars form a precise sliding track. The sliding closing plate 5 achieves a horizontal sliding connection with the coating mold 402 through this track. When the coating mold 402 is not in operation, for example, during the rotational mold changing process or when the production line is paused, the sliding closing plate 5 can be pushed to slide along the horizontal guide bars 405 directly under the coating mold 402. The dimensions of the sliding closing plate 5 are precisely designed so that when it is fully slid into place... When the sliding sealing plate 5 is in use, it can precisely block the entire horizontal extrusion port 404, forming a tight fit. As a physical barrier, the sliding sealing plate 5 isolates the precision horizontal extrusion port 404 from the external environment, effectively preventing mold damage and contamination caused by accidental collisions, scratches, or dust adhesion. In addition, the sliding sealing plate 5 blocks residual glue that may seep out from the inside of the mold, preventing it from dripping. When the coating mold 402 needs to be used for production, simply slide the sliding sealing plate 5 in the opposite direction along the horizontal guide bar 405 to completely expose the horizontal extrusion port 404 and restore normal coating operation.
[0022] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6As shown, preferably, a horizontal guide frame 603 is arranged parallel to the rear side of the horizontal conveying cylinder 101 in the coating mechanism. A horizontal traction frame 6 is slidably connected above the horizontal guide frame 603. The traction frame can move precisely in the horizontal direction on the guide frame. A special rotating fitting groove 602 is provided at the middle of the front side of the horizontal traction frame 6. A fitting traction block 501 is fixedly provided at the rear end of each sliding closing plate 5. The structure of the fitting traction block 501 cooperates with the rotating fitting groove 602. When the rotating adjusting cylinder 4 rotates, carrying the target coating mold 402 and finally precisely positioning it to the working position directly below the horizontal conveying cylinder 102, the fitting traction block 501 at the rear end of the sliding closing plate 5 installed on the mold also moves synchronously to the position corresponding to the rotating fitting groove 602 on the horizontal traction frame 6. Positioning and achieving automatic fitting connection, at this time, the traction motor 605 drives the traction screw 604, which is parallel to the outside of the horizontal guide frame 603, to rotate. Since the traction sleeve 601 is fixed in the middle of the horizontal traction frame 6, the traction sleeve 601 and the traction screw 604 form a helical pair. Therefore, when the traction screw 604 rotates forward and backward, it can drive the horizontal traction frame 6, which has been connected to the fitting traction block 501 through the rotating fitting groove 602, to perform precise horizontal reciprocating motion along the horizontal guide frame 603. By controlling the rotation direction of the traction motor 605, the horizontal traction frame 6 can pull the sliding sealing plate 5 connected to it, so that it slides smoothly along the horizontal guide strip 405 at the bottom of the coating mold 402, thereby realizing the sealing and opening operation of the sliding sealing plate 5 on the horizontal extrusion port 404, improving the safety and production efficiency of the equipment.
[0023] The coating mechanism for producing hot melt adhesive film provided by this utility model integrates multiple coating molds 402 through a rotating adjusting cylinder 4. Combined with a precision drive system, it realizes rapid and precise switching between different coating molds 402. It eliminates the cumbersome process of stopping the machine, draining glue, disassembling and installing molds in the traditional technology, shortens the mold replacement time, and improves the flexibility and production efficiency of the production line.
[0024] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of this utility model is limited to these examples; within the framework of this utility model, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of this utility model as described above, which are not provided in the details for the sake of brevity. Any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A coating mechanism for producing hot melt adhesive film, characterized in that, include: A horizontal base frame (1) is provided in the middle of the horizontal base frame (1), a horizontal conveying cylinder (101) is provided at the bottom of the horizontal conveying cylinder (101), and a horizontal conveying groove (102) is provided at the bottom of the horizontal conveying cylinder (101). Multiple horizontal heating tubes (103) are uniformly arranged around the inside of the horizontal conveying cylinder (101). A rotating adjusting cylinder (4) is nested and rotatably disposed on the outside of the horizontal conveying cylinder (101). The inner wall of the rotating adjusting cylinder (4) and the outer wall of the horizontal conveying cylinder (101) are in close contact with each other. A rotating gear ring (401) is arranged around the outer end of the rotating adjusting cylinder (4). A drive gear (104) is meshed with the outer side of the rotating gear ring (401). An adjusting motor (105) is connected to the shaft end of the drive gear (104). The adjusting motor (105) is fixedly connected to the horizontal base frame (1). Coating molds (402) are evenly arranged around the outside of the rotating adjusting cylinder (4). An extrusion slit (403) is provided in the middle of the coating mold (402). A horizontal extrusion port (404) is provided at the bottom end of the extrusion slit (403). The rotating adjusting cylinder (4) drives all the coating molds (402) to rotate synchronously and move to the bottom of the horizontal conveying trough (102) in sequence.
2. The coating mechanism for producing hot melt adhesive film according to claim 1, characterized in that, A horizontal support shaft (2) is provided at the center of the horizontal conveying cylinder (101). Spiral conveying plates (201) are symmetrically arranged on the left and right sides of the horizontal support shaft (2). The spiral conveying plates (201) are rotatably connected to the horizontal conveying cylinder (101) through the horizontal support shaft (2). A conveying motor (202) is connected to the shaft end of the horizontal support shaft (2).
3. The coating mechanism for producing hot melt adhesive film according to claim 2, characterized in that, The horizontal support shaft (2) is provided with a hollow conveying pipe (3) inside. The hollow conveying pipe (3) has a conveying opening (301) at its center. The hollow conveying pipe (3) is connected to the interior of the horizontal conveying cylinder (101) through the conveying opening (301). The outer end of the hollow conveying pipe (3) is connected to a rotary joint (302), and the outer side of the rotary joint (302) is connected to a conveying joint (303).
4. The coating mechanism for producing hot melt adhesive film according to claim 1, characterized in that, The coating mold (402) has horizontal guide strips (405) symmetrically arranged on the left and right sides of its bottom end. A sliding sealing plate (5) is arranged below the horizontal extrusion port (404). The sliding sealing plate (5) is horizontally slidably connected to the coating mold (402) through the horizontal guide strips (405). The sliding sealing plate (5) and the horizontal extrusion port (404) are mutually fitted. When the sliding sealing plate (5) is slidably inserted into the coating mold (402) through the horizontal guide strips (405), it simultaneously seals the horizontal extrusion port (404).
5. The coating mechanism for producing hot melt adhesive film according to claim 4, characterized in that, A horizontal guide frame (603) is arranged parallel to the rear side of the horizontal conveying cylinder (101). A horizontal traction frame (6) is slidably connected above the horizontal guide frame (603). A rotating fitting groove (602) is arranged in the middle of the front side of the horizontal traction frame (6). A fitting traction block (501) is arranged at the rear end of the sliding closing plate (5). The fitting traction block (501) and the rotating fitting groove (602) are mutually fitted. When the rotating adjusting cylinder (4) drives all the coating molds (402) to rotate synchronously to directly below the horizontal conveying trough (102) by rotation, the fitting traction block (501) at the rear end of the sliding closing plate (5) installed on the coating mold (402) is synchronously fitted and connected with the rotating fitting groove (602).
6. The coating mechanism for producing hot melt adhesive film according to claim 5, characterized in that, A traction screw (604) is arranged parallel to the outer side of the horizontal guide frame (603). A traction motor (605) is connected to the shaft end of the traction screw (604). A traction sleeve (601) is arranged in the middle of the horizontal traction frame (6). The horizontal traction frame (6) is connected to the traction screw (604) through the traction sleeve (601).