Raw material mixing device for adhesive tape production

Abstract

The invention discloses a raw material mixing device for adhesive tape production, and relates to the related technical field of mixing equipment.The raw material mixing device comprises a mixing cylinder, an outer stirring frame and an inner stirring frame are rotationally installed in the mixing cylinder, the inner stirring frame is installed in the outer stirring frame, and a reciprocating mechanism and a rotating mechanism are installed at the upper end of the mixing cylinder; the rotating mechanism comprises a top surface gear, a bottom surface gear and a supporting gear, the reciprocating mechanism comprises a driving gear, a linkage gear, a driven gear and a half-surface gear, and the reciprocating mechanism is used for driving the outer stirring frame and the inner stirring frame to synchronously perform periodic angular reciprocating rotation in the same circumferential direction; the rotating mechanism is used for driving the outer stirring frame and the inner stirring frame to rotate around the same axis at a uniform speed in opposite directions; the problems that due to the fact that an existing mixing device adopts a single rotating mode, mixing dead angles are formed, the mixing efficiency of high-viscosity materials is low, macroscopic convection and microcosmic dispersion are difficult to coordinate, and microcomponents are not evenly dispersed are solved.

Description

Technical Field

[0001] This invention relates to the technical field of mixing equipment, specifically to a raw material mixing device for tape production. Background Technology

[0002] In the tape production process, raw material mixing is a crucial step that determines the adhesive's performance. Currently, the mixing equipment commonly used in the industry typically consists of a mixing drum and a mechanical stirring system installed inside. This stirring system usually comprises a drive motor, a main shaft, and stirring blades mounted on the main shaft. Some improved models also add a scraping mechanism to the stirring shaft. The basic workflow is as follows: after the adhesive matrix, tackifying resin, fillers, and various additives are added to the mixing drum, the motor is started to drive the stirring shaft to rotate at a constant speed. The initial mixing and dispersion of the materials is achieved through the shearing action of the blades and the resulting fluid circulation. This device, with its simple structure and convenient control based on a single rotation, has become the fundamental equipment for mixing tape raw materials.

[0003] However, this type of mixing device based on uniform rotation has significant technical drawbacks. First, the fixed rotating flow field creates specific flow patterns within the mixing drum, easily generating dead zones near the drum wall, bottom corners, and between adjacent blades. High-viscosity materials are prone to stagnation in these areas, leading to macroscopically uneven mixing. Second, for adhesive systems with non-Newtonian properties, single-rotation shearing efficiency is low, and materials easily "slip" as the blades rotate as a whole, resulting in a limited effective shearing area, high energy consumption, and poor mixing. Third, although the wall scraping mechanism can remove material adhering to the wall, its continuous friction with the drum wall leads to component wear and localized temperature rise, and it cannot promote deep exchange between the wall material and the bulk material. Most importantly, existing devices struggle to reconcile the contradiction between macroscopic convection and microscopic dispersion: increasing the rotation speed enhances shearing but easily causes centrifugal separation of components with different specific gravities; decreasing the rotation speed avoids stratification but fails to effectively break up powder agglomerates, making uniform dispersion of trace additives particularly difficult. These problems severely impact the quality stability and production efficiency of adhesive tape products. Therefore, in order to solve the above-mentioned problems, a raw material mixing device for tape production is provided. Summary of the Invention

[0004] The purpose of this invention is to provide a raw material mixing device for tape production, in order to solve the problems mentioned in the background art, such as the formation of mixing dead zones, low mixing efficiency of high-viscosity materials, difficulty in coordinating macroscopic convection and microscopic dispersion, and uneven dispersion of trace components caused by the use of a single rotation mode in existing mixing devices.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a raw material mixing device for tape production, comprising a mixing cylinder, wherein an outer stirring frame and an inner stirring frame are rotatably installed inside the mixing cylinder, and the inner stirring frame is installed inside the outer stirring frame; The upper end of the mixing cylinder is equipped with a reciprocating mechanism and a rotating mechanism. The reciprocating mechanism is used to drive the outer and inner stirring frames to perform periodic angular reciprocating rotation synchronously along the same circumferential direction. The rotating mechanism is used to drive the outer and inner stirring frames to perform uniform rotational motions in opposite directions around the same axis.

[0006] In a further embodiment, the mixing cylinder has an inlet and an outlet at its upper and lower ends, respectively. A feed gate is installed at the upper inlet of the mixing cylinder, and a discharge gate is installed at the lower inlet and outlet of the mixing cylinder.

[0007] In a further embodiment, an outer casing is fixedly installed at the upper end of the mixing cylinder, and both the reciprocating mechanism and the rotating mechanism are installed inside the outer casing, with the reciprocating mechanism located above the rotating mechanism.

[0008] In a further embodiment, the reciprocating mechanism includes a driving gear, a linkage gear, a driven gear, and a half-face gear. The driving gear and the driven gear are both rotatably mounted on the central axis of the outer casing, and the driving gear is located at the upper end of the driven gear. There are two linkage gears and two half-face gears, and both linkage gears and half-face gears are rotatably installed inside the outer casing. The two linkage gears mesh on both sides of the driving gear, and the two half-face gears mesh on both sides of the driven gear. The linkage gear and half-face gear located on the same side are coaxially connected.

[0009] In a further embodiment, the rotating mechanism includes a top gear, a bottom gear, and a support gear. The top gear, bottom gear, and support gear are all bevel gears. The top gear and bottom gear are rotatably and symmetrically mounted inside the outer casing, with the top gear located above the bottom gear. Multiple support gears are provided, and the multiple support gears are arranged in a ring array and mesh between the top gear and the bottom gear.

[0010] In a further embodiment, the driven gear and the top gear are coaxially connected, and the rotation of the driven gear drives the top gear to rotate synchronously.

[0011] In a further embodiment, the outer stirring frame includes a main shaft, a first disturbance frame, and a collar. The main shaft is rotatably installed inside the mixing cylinder, and the upper end of the main shaft passes through the bottom gear and is fixedly connected to the lower end of the top gear. One end of the first disturbance frame is fixedly connected to the lower end of the main shaft, and the collar is fixedly connected to the other end of the first disturbance frame and is sleeved on the main shaft.

[0012] In a further embodiment, the inner stirring frame includes a sleeve, a second disturbance frame, and a support plate. The sleeve is fitted onto the outer wall of the main shaft, one side of the second disturbance frame is fixedly connected to the outer wall of the sleeve, the support plate is fixedly fitted onto the outer side of the sleeve, and the support plate is located above the second disturbance frame. The upper end of the sleeve passes through the upper end of the mixing cylinder and is fixedly connected to the lower end of the bottom gear.

[0013] In a further embodiment, a collar is fitted onto the outer wall of the sleeve, a support disc is used to support the collar, and multiple rollers that stabilize the rotation of the collar are rotatably mounted in a ring array inside the collar.

[0014] In a further embodiment, a bracket is fixedly installed at the lower end of the mixing cylinder, and the lower end of the main shaft is rotatably inserted into the upper end of the bracket.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. The present invention is a raw material mixing device for tape production. By setting an outer stirring frame and an inner stirring frame, and making the two form a compound motion mode in the mixing drum, that is, simultaneously performing periodic angular reciprocating rotation in the same direction and uniform rotation in opposite directions, the problem of existing single rotary mixing devices being prone to mixing dead angles due to fixed flow field and having low shearing efficiency for high viscosity materials is solved. 2. By setting a reciprocating mechanism to drive the outer and inner stirring frames to rotate synchronously to enhance macroscopic convection, and setting a rotating mechanism to drive the two to rotate stably in opposite directions at a uniform speed to enhance microscopic shearing, the problem of existing devices being unable to coordinate the contradiction between macroscopic mixing and microscopic dispersion, and unable to effectively break up powder agglomerates and uniformly disperse trace amounts of liquid additives is solved. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a raw material mixing device for tape production proposed in this invention; Figure 2 This is a schematic diagram of a half-section of the mixing cylinder of a raw material mixing device for tape production proposed in this invention; Figure 3 This is a schematic diagram of the overall connection structure of the outer stirring frame, inner stirring frame, reciprocating mechanism, and rotating mechanism of a raw material mixing device for tape production proposed in this invention. Figure 4 This is a schematic diagram of the overall structure of the outer stirring frame of a raw material mixing device for tape production proposed in this invention; Figure 5 This is a schematic diagram of the overall structure of the inner stirring frame of a raw material mixing device for tape production proposed in this invention; Figure 6 This is a partial structural diagram of the outer and inner mixing frames of a raw material mixing device for tape production proposed in this invention; Figure 7 This is a half-sectional view of the outer casing of a raw material mixing device for tape production proposed in this invention. Figure 8 This is a half-sectional front view of the outer casing of a raw material mixing device for tape production proposed in this invention; Figure 9 This is a schematic diagram of the reciprocating mechanism of a raw material mixing device for tape production proposed in this invention; Figure 10 This is a schematic diagram of the rotating mechanism of a raw material mixing device for tape production proposed in this invention.

[0017] In the diagram: 1. Mixing cylinder; 11. Feed gate; 12. Discharge gate; 13. Outer casing; 2. Outer mixing frame; 21. Main shaft; 22. First disturbance frame; 23. Collar; 231. Roller; 3. Inner mixing frame; 31. Sleeve; 32. Second disturbance frame; 33. Support plate; 4. Reciprocating mechanism; 41. Driving gear; 42. Linkage gear; 43. Driven gear; 44. Half-face gear; 5. Rotating mechanism; 51. Top surface gear; 52. Bottom surface gear; 53. Support gear; 6. Bracket. Detailed Implementation

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see Figures 1-10 This embodiment provides a raw material mixing device for tape production, including a mixing cylinder 1, which constitutes the main container space for material mixing and reaction. To facilitate material input and final product discharge, the mixing cylinder 1 has an inlet and an outlet at its upper and lower ends, respectively. The upper inlet is equipped with an inlet gate 11, which opens during material input and closes during mixing to create a essentially closed mixing environment, preventing volatilization or contamination. The lower outlet is equipped with a discharge gate 12. After the mixing process is completed, opening the discharge gate 12 allows the uniformly mixed tape raw material to be discharged for the next process. This design with separate inlets and outlets at the top and bottom conforms to the direction of gravity flow and facilitates the organization of the production process.

[0020] An outer casing 13 is fixedly installed at the upper end of the mixing cylinder 1. This outer casing 13 plays a crucial role in protection and integration. The core transmission components of the device are completely enclosed within the outer casing 13, forming a clean and safe external structure. This effectively prevents dust and foreign objects from entering the precision transmission system, and also avoids accidental contact between operators and moving parts, ensuring production safety. More importantly, the outer casing 13 provides a stable, coaxial mounting base for all internal transmission components, ensuring the accuracy and reliability of the entire power transmission path. In this embodiment, both the reciprocating mechanism 4 and the rotating mechanism 5 are integrated and installed inside the outer casing 13. This integrated design makes the device compact, occupies a small area, and facilitates overall installation, debugging, and maintenance. Specifically, the reciprocating mechanism 4 is located above the rotating mechanism 5, forming a top-down power transmission sequence, making the overall transmission chain clear and the energy transmission path well-defined.

[0021] The interior of mixing drum 1 is the key area for achieving material mixing. Here, an outer stirring frame 2 and an inner stirring frame 3 are rotatably mounted. For example... Figure 3 As shown, the inner mixing frame 3 is installed inside the outer mixing frame 2, forming a coaxial nested spatial relationship. This nested structure allows the movements of the two mixing frames to be independent yet closely related, laying the foundation for generating a complex flow field. Both the outer mixing frame 2 and the inner mixing frame 3 are tubular structures. This structure ensures sufficient mechanical strength while minimizing rotational resistance and allowing the mixed materials to flow freely inside and outside the frame, avoiding the "material encapsulation" and flow obstruction phenomena that may occur with traditional solid impellers. When the outer mixing frame 2 and the inner mixing frame 3 are driven to rotate in opposite directions, a velocity gradient is formed between the frame structures of the outer mixing frame 2 and the inner mixing frame 3, thereby generating a strong shear force. This shear force is crucial for breaking up powder agglomerates (such as fillers and pigments) in the adhesive, breaking up droplets, and promoting uniform mixing at the microscale, which is a key factor in improving the performance of the final tape product.

[0022] To drive the two mixing racks to generate the required combined motion, two sets of cooperating mechanical transmission systems are carefully arranged within the outer casing 13: a reciprocating mechanism 4 and a rotating mechanism 5. The core function of the reciprocating mechanism 4 is to drive the outer mixing rack 2 and the inner mixing rack 3 to perform synchronous, periodic angular reciprocating rotations along the same circumferential direction. Note that "synchronous" here means that the phase and period of the rotational motion are consistent, but the instantaneous values ​​of the angular velocities of the outer mixing rack 2 and the inner mixing rack 3 may differ slightly due to minor differences in the transmission chain, but the macroscopic motion pattern is synchronized. This rotational motion mimics the action of hand "kneading," which can periodically squeeze, stretch, and fold the material. For high-viscosity, thixotropic adhesive tape raw materials, this low-frequency, large-displacement reciprocating motion is more effective than simple high-speed rotation in disrupting the internal structural network of the material, preventing it from re-thickening in the low-shear region after shear thinning, thereby achieving homogenization from the macroscopic to the mesoscopic scale. Meanwhile, the reciprocating rotation can continuously "push" the low-speed stagnant material near the wall and bottom of the mixing cylinder 1 towards the central high-shear zone, fundamentally solving the problem of mixing dead zones.

[0023] Specifically, such as Figure 7 , Figure 8 and Figure 9As shown, the reciprocating mechanism 4 consists of a driving gear 41, a linkage gear 42, a driven gear 43, and a faceted gear 44. The driving gear 41 and the driven gear 43 are rotatably mounted on the central axis of the outer casing 13 via bearings, with the driving gear 41 located at the upper end of the driven gear 43. The linkage gear 42 and the faceted gear 44 are both configured as pairs, symmetrically mounted within the outer casing 13. The two linkage gears 42 mesh with the two sides of the driving gear 41, receiving rotational power from it. The two faceted gears 44 mesh with the two sides of the driven gear 43. Crucially, the linkage gear 42 and the faceted gear 44 on the same side are coaxially connected via a short shaft, ensuring that their rotational speed and direction of rotation remain consistent. The reciprocating motion is achieved through the special design of the faceted gear 44: each faceted gear 44 has teeth distributed on only half of its circumference, while the other half is a smooth, toothless surface. The two facet gears 44 are installed in the same direction, meaning that after installation, the tooth surfaces of the facet gears 44 always maintain the same orientation. When the motor drives the driving gear 41 to rotate at a constant speed, the power is transmitted to the two facet gears 44 through the linkage gear 42. Within one motion cycle, when the toothed part of one facet gear 44 meshes with the driven gear 43, it drives the driven gear 43 to rotate in one direction; at this time, the toothless surface of the other facet gear 44 faces the driven gear 43, and the two disengage. As the facet gears 44 continue to rotate, the previously meshed facet gears 44 disengage, and the previously disengaged facet gears 44 engage, thereby driving the driven gear 43 to rotate in the opposite direction. This cycle repeats, and the two alternately working facet gears 44 convert the constant speed rotation input from the motor into the periodic reciprocating rotation of the driven gear 43. This method of achieving reciprocating motion through pure gear transmission is reliable in structure, precise in motion law, and does not require complex cam or crank-connecting rod mechanisms, making maintenance simple. In practical applications, in order to reduce the impact and noise generated at the moment of meshing switching between the half-face gear 44 and the driven gear 43, and to protect the gear from damage, elastic buffers can be set on the edge teeth on both sides of the half-face gear 44 when the teeth enter and disengage. For example, a layer of rubber pad or engineering plastic can be vulcanized and wrapped. The impact energy is absorbed by the elastic deformation of the material, which significantly improves the smoothness of transmission and the life of components.

[0024] The rotating mechanism 5, working in conjunction with the reciprocating mechanism 4, drives the outer stirring frame 2 and the inner stirring frame 3 to rotate at a constant speed in opposite directions around the same axis. Here, "constant speed" refers to a stable rotational speed output after transmission through the gear system, provided the motor input is constant. The superposition of reverse rotation and reciprocating rotation acts as a multiplier for the mixing capacity of this device. Based on the axial and radial convection caused by rotation, reverse rotation provides continuous, high-shear circumferential motion. These two motion modes are not simply superimposed but rather modulated: rotation alters the flow field boundary generated by reverse rotation, causing it to constantly change; while reverse rotation applies shear at every instant of rotation, ensuring that the material is subjected to multi-directional, time-varying forces at any spatial point, thus producing a sophisticated effect similar to "chaotic mixing," with mixing efficiency and uniformity far exceeding that of a single motion mode.

[0025] like Figure 7 , Figure 8 and Figure 10 As shown, the rotating mechanism 5 is specifically implemented using a bevel gear set. The rotating mechanism 5 includes a top gear 51, a bottom gear 52, and multiple support gears 53, all of which are bevel gears. The top gear 51 and bottom gear 52 are rotatably mounted symmetrically within the outer casing 13 via bearings, with the top gear 51 positioned above the bottom gear 52. The multiple support gears 53 are arranged in a circular array, simultaneously meshing between the top gear 51 and the bottom gear 52, playing a crucial role in transmitting power and changing direction. The driven gear 43 is coaxially connected to the top gear 51 via a shaft, thus the reciprocating rotation of the driven gear 43 is directly and synchronously transmitted to the top gear 51. The reciprocating rotation of the top gear 51 is transmitted to the bottom gear 52 through the circular array of support gears 53. According to the principle of bevel gear transmission, the top gear 51 and the bottom gear 52 rotate in opposite directions via an intermediate support gear 53. Therefore, when the top gear 51 reciprocates, the bottom gear 52 also reciprocates synchronously but in the opposite direction. It is important to emphasize that the reciprocating rotation generated by the reciprocating mechanism 4 is transmitted simultaneously to the outer stirring frame 2 and the inner stirring frame 3 connected to them through the path of the driven gear 43, the top gear 51, the support gear 53, and the bottom gear 52, so that the two can produce the aforementioned synchronous reciprocating rotation.

[0026] Next, the specific structure of the mixing rack and its connection relationships will be described in detail. For example... Figure 3 and Figure 4As shown, the outer stirring frame 2 is the main body responsible for performing the stirring task in the external mixing area. The outer stirring frame 2 includes a main shaft 21, a first disturbance frame 22, and a collar 23. The main shaft 21 is the core load-bearing and transmission shaft of the entire stirring system, with both its upper and lower ends supported by bearings. The upper end of the main shaft 21 passes through the bottom gear 52 and the sealing structure at the upper end of the mixing cylinder 1, and is finally fixedly connected to the lower center of the top gear 51. This means that all the motion of the top gear 51 (reciprocating rotation + uniform rotation) will be directly transmitted to the main shaft 21 without any loss. The lower end of the main shaft 21 extends into the interior of the mixing cylinder 1, and one end of the first disturbance frame 22 is fixedly connected to the lower end of the main shaft 21. The first disturbance frame 22 is typically designed as a frame composed of multiple radial rods. The collar 23 is fixedly connected to the upper end of the first disturbance frame 22 and is sleeved on the main shaft 21 (the sleeve 31 is located between the main shaft 21 and the collar 23). This further enhances the stability of the connection between the first disturbance frame 22 and the main shaft 21, ensuring that no strong deformation or vibration will occur under complex stress.

[0027] like Figure 3 and Figure 5 As shown, the inner stirring frame 3 is nested within the outer stirring frame 2, responsible for stirring the materials in the internal area. The inner stirring frame 3 includes a sleeve 31, a second disturbance frame 32, and a support plate 33. The sleeve 31 is sleeved on the outer wall of the main shaft 21 via bearings, allowing the sleeve 31 to rotate freely independently of the main shaft 21. One side of the second disturbance frame 32 is fixedly connected to the outer wall of the sleeve 31, and its structure may be similar to the first disturbance frame 22 or optimized for the inner flow field. The support plate 33 is fixedly sleeved on the outside of the sleeve 31, located above the second disturbance frame 32. The upper end of the sleeve 31 also penetrates the sealing structure at the upper end of the mixing cylinder 1 and is fixedly connected to the lower center of the bottom gear 52. Therefore, all the movements of the bottom gear 52 (reciprocating rotation in the opposite direction to the top gear 51 plus uniform rotation in the opposite direction) will be directly transmitted to the sleeve 31, thereby driving the entire inner stirring frame 3 to move.

[0028] To achieve independent movement of the inner and outer mixing frames and establish a stable relative motion relationship between them, the collar 23 is designed to fit onto the outer wall of the sleeve 31. Simultaneously, a key function of the support plate 33 is to support the collar 23 from below, providing a stable sliding support surface for the collar 23 (along with the entire outer mixing frame 2) in the axial direction, preventing it from shifting due to axial forces during operation. To significantly reduce the frictional resistance of the collar 23 sliding on the support plate 33 and rotating relative to the sleeve 31, and to ensure power transmission efficiency and motion accuracy, such as... Figure 6As shown, multiple rollers 231 are rotatably mounted in a ring array inside the collar 23. These rollers 231 constitute a highly efficient bearing structure. More preferably, the rollers 231 are configured in two sets: the cylindrical surfaces of the first set of rollers 231 contact the outer wall of the sleeve 31, mainly bearing radial force and allowing smooth relative rotation between the collar 23 and the sleeve 31; the end faces of the second set of rollers 231 contact the upper surface of the support disk 33, mainly bearing axial force and allowing the collar 23 to slide smoothly relative to the support disk 33 (when small axial displacement occurs). This dual-set roller 231 design creates a low-resistance kinematic pair between the outer stirring frame 2 and the inner stirring frame 3 in both the radial and axial directions, ensuring that the complex compound motion transmitted by the top gear 51 and the bottom gear 52 can be executed clearly and independently without generating additional frictional power consumption, vibration, or structural damage due to mutual interference.

[0029] Finally, a bracket 6 is fixedly installed at the lower end of the mixing drum 1. The lower end of the main shaft 21 is rotatably connected to the upper end of the bracket 6 via a bearing. The bracket 6 provides stable radial and axial support to the lower end of the main shaft 21, and together with the drive support at the upper end, it forms a two-point support system for the main shaft 21. This ensures the dynamic stability of the main shaft 21 under combined high-speed reverse rotation and reciprocating rotation conditions, prevents excessive deflection or vibration problems that may occur on a long cantilever shaft, and ensures the smooth and reliable operation of the entire machine.

[0030] To ensure the stability of the rotation of the outer stirring frame 2 and the inner stirring frame 3, multiple first disturbance frames 22 and second disturbance frames 32 are provided. Figure 3 For example, there are two first disturbance frames 22 and two second disturbance frames 32, and the two first disturbance frames 22 and the two second disturbance frames 32 are arranged symmetrically.

[0031] The working process of this embodiment is as follows: The motor mounted on the outer casing 13 to drive the drive gear 41 is started. The motor outputs a uniform rotation, driving the drive gear 41 to rotate. The drive gear 41 drives the linkage gears 42 on both sides to rotate, and the linkage gears 42 drive the two coaxial half-face gears 44 to rotate synchronously. The two phase-shifted half-face gears 44 alternately mesh to drive the driven gear 43, causing it to output periodic reciprocating rotation. The reciprocating rotation of the driven gear 43 drives the coaxial top gear 51 to reciprocate synchronously. The reciprocating rotation of the top gear 51 directly drives the main shaft 21 and the outer stirring frame 2, which are fixed to it, to reciprocate; on the other hand, through the multiple support gears 53 in a ring array, it drives the bottom gear 52 to reciprocate in the opposite direction. The reverse reciprocating rotation of the bottom gear 52 drives the sleeve 31 and the inner stirring frame 3, which are fixed to it, to reciprocate synchronously but in the opposite direction to the outer stirring frame 2. Simultaneously, the uniform rotational input of the motor, through a series of gear pairs including the driving gear 41, the linkage gear 42, the half-face gear 44, the driven gear 43, the top gear 51, the support gear 53, and the bottom gear 52, is ultimately transmitted and converted into a stable and continuous counter-uniform rotational motion between the outer stirring frame 2 (main shaft 21) and the inner stirring frame 3 (sleeve 31). Therefore, the outer stirring frame 2 and the inner stirring frame 3 are simultaneously performing two types of motion: one is a periodic angular reciprocating rotation with the same frequency and direction; the other is a uniform rotation with a stable speed and opposite direction. The synthesis of these two motions in three-dimensional space makes the motion trajectories of the first disturbance frame 22 and the second disturbance frame 32 extremely complex, generating strong stretching, compression, shearing, and convection effects on the tape material within the mixing drum 1. This achieves highly uniform mixing from macroscopic to microscopic levels in a very short time, without any dead zones in the flow.

[0032] Compared to existing adhesive tape mixing devices, this invention employs a purely mechanical transmission system, innovatively combining and synchronously driving two basic motion modes: reciprocating rotation and reverse rotation. This solves long-standing technical problems in the industry, such as dead zones, uneven shearing, low dispersion efficiency, and component separation due to centrifugal force during the mixing process of high-viscosity, non-Newtonian adhesives. Through the precision and reliability of gear transmission, the complex mixing process is simplified and mechanized. While improving mixing quality and efficiency, it ensures equipment durability and low maintenance costs, demonstrating outstanding substantive features and significant progress.

[0033] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A raw material mixing device for tape production, comprising a mixing cylinder (1), characterized in that: The mixing cylinder (1) is rotatably equipped with an outer stirring frame (2) and an inner stirring frame (3), with the inner stirring frame (3) installed inside the outer stirring frame (2); The upper end of the mixing cylinder (1) is equipped with a reciprocating mechanism (4) and a rotating mechanism (5). The reciprocating mechanism (4) is used to drive the outer stirring frame (2) and the inner stirring frame (3) to perform periodic angular reciprocating rotation synchronously along the same circumferential direction. The rotating mechanism (5) is used to drive the outer stirring frame (2) and the inner stirring frame (3) to perform uniform rotational motion in opposite directions around the same axis.

2. The raw material mixing device for tape production according to claim 1, characterized in that: The mixing cylinder (1) has an inlet and an outlet at its upper and lower ends, respectively. A feed gate (11) is installed at the upper feed inlet of the mixing cylinder (1), and a discharge gate (12) is installed at the lower feed outlet of the mixing cylinder (1).

3. The raw material mixing device for tape production according to claim 2, characterized in that: The upper end of the mixing cylinder (1) is fixedly installed with an outer cover (13). The reciprocating mechanism (4) and the rotating mechanism (5) are both installed inside the outer cover (13), and the reciprocating mechanism (4) is located above the rotating mechanism (5).

4. The raw material mixing device for tape production according to claim 3, characterized in that: The reciprocating mechanism (4) includes a driving gear (41), a linkage gear (42), a driven gear (43), and a half-face gear (44). The driving gear (41) and the driven gear (43) are rotatably mounted on the central axis of the outer casing (13), and the driving gear (41) is located at the upper end of the driven gear (43). The linkage gear (42) and the half-face gear (44) are both provided in pairs, and the linkage gear (42) and the half-face gear (44) are rotatably installed in the outer casing (13). The two linkage gears (42) are respectively meshed on both sides of the driving gear (41), and the two half-face gears (44) are respectively meshed on both sides of the driven gear (43). The linkage gear (42) and the half-face gear (44) located on the same side are coaxially connected.

5. The raw material mixing device for tape production according to claim 4, characterized in that: The rotating mechanism (5) includes a top gear (51), a bottom gear (52), and a support gear (53). The top gear (51), bottom gear (52), and support gear (53) are all bevel gears. The top gear (51) and bottom gear (52) are rotatably and symmetrically mounted inside the outer casing (13), with the top gear (51) located above the bottom gear (52). There are multiple support gears (53), and the multiple support gears (53) are meshed in a ring array between the top gear (51) and the bottom gear (52).

6. The raw material mixing device for tape production according to claim 5, characterized in that: The driven gear (43) is coaxially connected to the top gear (51), and the rotation of the driven gear (43) drives the top gear (51) to rotate synchronously.

7. The raw material mixing device for tape production according to claim 6, characterized in that: The external stirring frame (2) includes a main shaft (21), a first disturbance frame (22) and a collar (23). The main shaft (21) is rotatably installed inside the mixing cylinder (1), and the upper end of the main shaft (21) passes through the bottom gear (52) and is fixedly connected to the lower end of the top gear (51). One end of the first disturbance frame (22) is fixedly connected to the lower end of the main shaft (21), and the collar (23) is fixedly connected to the other end of the first disturbance frame (22) and is sleeved on the main shaft (21).

8. The raw material mixing device for tape production according to claim 7, characterized in that: The inner stirring frame (3) includes a sleeve (31), a second disturbance frame (32), and a support plate (33). The sleeve (31) is sleeved on the outer wall of the main shaft (21). One side of the second disturbance frame (32) is fixedly connected to the outer wall of the sleeve (31). The support plate (33) is fixedly sleeved on the outer side of the sleeve (31) and is located above the second disturbance frame (32). The upper end of the sleeve (31) passes through the upper end of the mixing cylinder (1) and is fixedly connected to the lower end of the bottom gear (52).

9. A raw material mixing device for tape production according to claim 8, characterized in that: The collar (23) is sleeved on the outer wall of the sleeve (31), and the support plate (33) is used to support the collar (23). The collar (23) has multiple rollers (231) arranged in a ring array inside to stabilize the rotation of the collar (23).

10. A raw material mixing device for tape production according to claim 9, characterized in that: A bracket (6) is fixedly installed at the lower end of the interior of the mixing cylinder (1), and the lower end of the main shaft (21) is rotatably inserted into the upper end of the bracket (6).

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