A plastic film production raw material mixing machine

Abstract

This utility model discloses a mixing machine for raw materials in plastic film production, including an outer cylinder and an inner cylinder. The inner cylinder is rotatably installed centrally inside the outer cylinder, forming a cavity between them. A rotating shaft is vertically installed at the center of the outer cylinder, penetrating both the outer and inner cylinders. Active stirring blades are fixedly installed around the outer wall of the rotating shaft, inside the inner cylinder. Several sets of passive stirring blades are equidistantly installed along the circumferential direction on the inner wall of the inner cylinder. A drive gear disk is installed on the outer wall of the rotating shaft, below the outer cylinder. This utility model, through its dual stirring structure, allows the inner cylinder and active stirring blades to work together. The counter-current motion of the active and passive stirring blades creates strong convection and shear forces, ensuring thorough mixing of materials in both horizontal and vertical directions. This significantly improves mixing uniformity and efficiency, enabling the uniform mixing of raw materials for plastic film production with different densities, particle sizes, and shapes in a shorter time.

Description

Technical Field

[0001] This utility model relates to the field of plastic film production and processing technology, and in particular to a raw material mixing machine for plastic film production and processing. Background Technology

[0002] In the production and processing of plastic film, the uniformity of raw material mixing plays a crucial role in the quality of the final product. Uniformly mixed raw materials can ensure that the plastic film has stable physical properties, chemical properties, and appearance quality, such as good transparency, strength, and flexibility. If the raw materials are not mixed uniformly, defects such as spots, streaks, and uneven thickness may appear on the plastic film, which will seriously affect the product quality and market competitiveness.

[0003] Currently, the raw material mixing machines commonly used in the market for plastic film production and processing have some shortcomings.

[0004] Some mixers only use a single-shaft mixing method. During the rotation of the mixing blades, the material can only be mixed in a local area, making it difficult to achieve full mixing of the material in the entire mixing space. This single mixing method is prone to material stratification, especially for raw materials with different densities and particle sizes, resulting in poor mixing effect.

[0005] For example, when mixing granular and powdered raw materials, the granular materials may settle at the bottom, while the powdered materials tend to float on the top, making it difficult to meet the production requirements for the uniformity of the mixed materials.

[0006] Therefore, how to provide a mixing machine for raw materials in plastic film production and processing is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0007] One objective of this invention is to provide a mixing machine for raw materials used in plastic film production. This invention utilizes a dual-stirring structure, with the inner cylinder and active stirring blades working in tandem. The opposing movements of the active and passive stirring blades generate strong convection and shear forces, ensuring thorough mixing of materials in both horizontal and vertical directions. This significantly improves mixing uniformity and efficiency, enabling the uniform mixing of raw materials for plastic film production with different densities, particle sizes, and shapes in a shorter time.

[0008] A plastic film production and processing raw material mixing machine according to an embodiment of the present utility model includes an outer cylinder and an inner cylinder;

[0009] The inner cylinder is rotatably installed in the center inside the outer cylinder, and a cavity is formed between the inner cylinder and the outer cylinder. A rotating shaft that penetrates the outer cylinder and the inner cylinder is vertically installed at the center of the outer cylinder. Active stirring blades are fixedly installed on the outer wall of the rotating shaft and around the inner side of the inner cylinder. Several sets of passive stirring blades are equidistantly installed on the inner wall of the inner cylinder along the circumferential direction.

[0010] A drive gear disk is installed on the outer wall of the rotating shaft and below the outer cylinder. A transmission gear disk is meshed around the bottom of the outer cylinder and around the drive gear disk. A driven gear disk is meshed around the bottom of the outer cylinder and on the outside of each set of transmission gear disks. A rotating rod is provided at the inner center of the driven gear disk. The top of the rotating rod passes through the outer cylinder and a transmission gear is installed around the inside of the outer cylinder. A toothed ring is installed around the lower outer wall of the inner cylinder. The transmission gear and the toothed ring mesh with each other.

[0011] Furthermore, a protective cover is installed at the top connection between the outer cylinder and the inner cylinder, and a sealing cover is installed on the top of the protective cover via a movable connection.

[0012] Furthermore, support legs for supporting the outer cylinder are fixedly installed at the four corners of the bottom of the outer cylinder.

[0013] Furthermore, motor mounts are fixedly welded to the inner sides of the four sets of support legs, and a stirring motor is fixedly installed on the top of the motor mounts. The output shaft of the stirring motor is connected to the rotating shaft through a transmission method.

[0014] Furthermore, the active stirring blades are arranged in a ring on the rotating shaft, and each group of active stirring blades is equidistant.

[0015] Furthermore, the passive stirring blade is set at an inclined angle to the inner wall of the inner cylinder, and the inclined angle is 30°-60°.

[0016] Furthermore, the driving gear disk, transmission gear disk, and driven gear disk are all involute gears with the same module.

[0017] Furthermore, a sealing rubber ring is provided between the sealing cap and the protective cap to enhance the sealing effect.

[0018] The beneficial effects of this utility model are:

[0019] 1. This utility model uses active stirring blades that rotate with the shaft speed to perform central shearing and crushing of materials. The inner cylinder rotates in the opposite direction through gear transmission, and the passive stirring blades on its inner wall turn the materials at an inclined angle, forming a composite convection in the horizontal and vertical directions. The two work together to significantly enhance the shearing, diffusion and turning effect of the materials, greatly improve the mixing uniformity and shorten the mixing time.

[0020] 2. This utility model consists of a multi-stage transmission system composed of a drive gear disk, a transmission gear disk, and a driven gear disk. Stable power transmission is achieved through the meshing of involute gears with the same module. At the same time, the rotational speed of the inner cylinder 4 can be precisely controlled by adjusting the gear ratio to adapt to the mixing requirements of different plastic film raw materials and improve the versatility of the equipment. Attached Figure Description

[0021] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0022] Figure 1 This is a schematic diagram of the overall structure of a plastic film production and processing raw material mixing machine proposed in this utility model;

[0023] Figure 2 This is a schematic diagram of the opening structure of the sealing cover of a plastic film production raw material mixing machine proposed in this utility model;

[0024] Figure 3 This is a schematic diagram of the opening structure of the protective cover of a plastic film production raw material mixing machine proposed in this utility model;

[0025] Figure 4 This is a schematic diagram of the bottom structure of a raw material mixing machine for plastic film production and processing proposed in this utility model.

[0026] In the diagram: 1. Outer cylinder; 2. Protective cover; 3. Sealing cover; 4. Inner cylinder; 5. Rotating shaft; 6. Active stirring blade; 7. Passive stirring blade; 8. Gear ring; 9. Transmission gear; 10. Cavity; 11. Support leg; 12. Stirring motor; 13. Drive gear disk; 14. Rotating rod; 15. Transmission gear disk; 16. Driven gear disk; 17. Motor base. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0028] Example 1

[0029] refer to Figure 1-4 The plastic film production and processing raw material mixing machine of this embodiment is mainly composed of an outer cylinder 1, an inner cylinder 4, a rotating shaft 5, a stirring blade, a gear transmission mechanism, a protective cover 2, a sealing cover 3, support legs 11, a motor base 17, and a stirring motor 12.

[0030] The outer cylinder 1 serves as the outer shell of the mixer, protecting the internal structure and containing the materials. The inner cylinder 4 is rotatably and centrally installed inside the outer cylinder 1, forming a relatively independent mixing space. A rotating shaft 5, which passes through the outer cylinder 1 and the inner cylinder 4, is vertically installed at the center of the outer cylinder 1. The rotating shaft 5 is the core component for power transmission of the entire mixer.

[0031] Example 2

[0032] refer to Figure 1-4In this embodiment, active stirring blades 6 are fixedly installed on the outer wall of the rotating shaft 5 and around the inner side of the inner cylinder 4. The active stirring blades 6 are distributed in a ring on the rotating shaft 5, and each group of active stirring blades 6 is equidistant. Several groups of passive stirring blades 7 are equidistantly installed on the inner wall of the inner cylinder 4 along the circumferential direction. The passive stirring blades 7 are inclined at an angle to the inner wall of the inner cylinder 4, and the inclination angle is 30°-60°. In this embodiment, the inclination angle is preferably 45°.

[0033] When the stirring motor 12 starts, the output shaft at the top of the stirring motor 12 drives the rotating shaft 5 to rotate, thereby causing the active stirring blade 6 to follow the rotating shaft 5 in a circular motion. During the rotation, the active stirring blade 6 stirs the plastic film production raw materials located in the inner cylinder 4. At the same time, since the inner cylinder 4 will rotate under the drive of the gear transmission mechanism, the passive stirring blade 7 installed on the inner wall of the inner cylinder 4 will also rotate. The active stirring blade 6 and the passive stirring blade 7 rotate in different directions, and the tilt angle of the passive stirring blade 7 is set so that the material is not only mixed in the horizontal direction, but also turned over in the vertical direction during the stirring process, which greatly improves the mixing effect of the material.

[0034] Example 3

[0035] refer to Figure 1-4 This embodiment details the gear transmission mechanism and its transmission principle. A drive gear disk 13 is installed on the outer wall of the rotating shaft 5 and below the outer cylinder 1. A transmission gear disk 15 is meshed around the bottom of the outer cylinder 1 and surrounding the drive gear disk 13. A driven gear disk 16 is meshed around the bottom of the outer cylinder 1 and outside each set of transmission gear disks 15. A rotating rod 14 is provided at the inner center of the driven gear disk 16. The top of the rotating rod 14 penetrates the outer cylinder 1 and a transmission gear 9 is installed around the inside of the outer cylinder 1. A toothed ring 8 is installed around the lower outer wall of the inner cylinder 4. The transmission gear 9 meshes with the toothed ring 8. The drive gear disk 13, transmission gear disk 15 and driven gear disk 16 are all involute gears with the same module.

[0036] When the stirring motor 12 drives the rotating shaft 5 to rotate, the drive gear disk 13 rotates accordingly. Since the drive gear disk 13 meshes with the transmission gear disk 15, the rotation of the drive gear disk 13 will drive the transmission gear disk 15 to rotate. The transmission gear disk 15 meshes with the driven gear disk 16, thereby driving the driven gear disk 16 to rotate. When the driven gear disk 16 rotates, it drives the transmission gear 9 to rotate through the rotating rod 14. The transmission gear 9 meshes with the gear ring 8, ultimately causing the inner cylinder 4 to rotate. This multi-stage gear transmission structure can achieve stable power transmission and can adjust the rotation speed of the inner cylinder 4 according to different gear tooth ratios to adapt to different mixing requirements.

[0037] Example 4

[0038] refer to Figure 1-2 This embodiment focuses on describing the protection and sealing structure. A protective cover 2 is installed at the top connection between the outer cylinder 1 and the inner cylinder 4. The protective cover 2 can prevent external debris from entering the mixer and protect the internal structure and materials from contamination. A sealing cover 3 is installed on the top of the protective cover 2 through a movable connection. A sealing rubber ring is provided between the sealing cover 3 and the protective cover 2 to enhance the sealing effect.

[0039] When the mixer is working, the sealing cover 3 is closed. The sealing rubber ring can effectively prevent the dust generated by the material during the mixing process from leaking into the external environment, which not only ensures the cleanliness of the working environment, but also avoids material waste. At the same time, the setting of the protective cover 2 and the sealing cover 3 can also reduce the noise generated by the mixer to a certain extent.

[0040] Example 5

[0041] refer to Figure 4 This embodiment describes the support and power structure of the mixer. Support legs 11 are fixedly installed at the four corners of the bottom of the outer cylinder 1 to support the outer cylinder 1. The support legs 11 provide stable support for the entire mixer and ensure that the mixer will not shake during operation. Motor bases 17 are fixedly welded to the inner side of the four sets of support legs 11. A stirring motor 12 is fixedly installed on the top of the motor base 17. The output shaft of the stirring motor 12 is connected to the rotating shaft 5 through a transmission method.

[0042] The motor mount 17 can effectively fix the mixing motor 12 and reduce the impact of the vibration generated by the mixing motor 12 during operation on the overall structure of the mixer. As the power source of the mixer, the mixing motor 12 transmits power to the rotating shaft 5 through the output shaft, thereby driving the entire mixing and transmission system. In practical applications, a mixing motor 12 with appropriate power can be selected according to the specifications of the mixer and the mixing requirements.

[0043] Working principle: The stirring motor 12 is fixedly installed on the motor base 17. After the motor starts, the top output shaft directly drives the rotating shaft 5 to rotate. Active stirring blades 6 are fixedly installed around the outer wall of the rotating shaft 5 on the inner side of the inner cylinder 4. As the rotating shaft 5 rotates, the active stirring blades 6 rotate at high speed in a ring-shaped distribution, directly stirring the plastic film raw material in the inner cylinder 4, forming material tumbling and shearing in the central area, initially breaking up material clumps and promoting initial mixing. The drive gear disk 13 below the rotating shaft 5 rotates synchronously with the rotating shaft. The drive gear disk 13 meshes with the transmission gear disk 15 surrounding it, transmitting power to the transmission gear disk 15. The transmission gear disk 15 further meshes with the outer driven gear disk 16, driving the driven gear. As disk 16 rotates, the driven gear disk 16 drives the transmission gear 9 inside the outer cylinder 1 to rotate via the rotating rod 14 at its center. The transmission gear 9 meshes with the gear ring 8 on the outer wall of the inner cylinder 4, ultimately driving the inner cylinder 4 to rotate in the opposite direction to the rotating shaft 5. When the inner cylinder 4 rotates, the passive stirring blades 7, which are equidistantly installed on its inner wall, also rotate. The passive stirring blades 7 are inclined at an angle of 30°-60° to the inner wall of the inner cylinder 4. This design ensures that the material is not only pushed horizontally during the rotation of the inner cylinder, but also tumbled vertically due to the inclination angle. The counter-rotation of the active stirring blades 6 and the passive stirring blades 7 creates strong convection and shearing forces, significantly improving the mixing uniformity of the material. The annular space between the outer cylinder 1 and the inner cylinder 4 forms a circulation channel for the material. The rotation of the inner cylinder 4 causes the material to be squeezed and diffused between the inner and outer walls of the inner cylinder. Combined with the central stirring of the active stirring blades 6, a composite mixing mode of "central shearing + peripheral tumbling" is formed. Under the combined action of centrifugal force and stirring blades, the material continuously circulates inside and outside the inner cylinder, as well as in the upper and lower areas, ensuring that all raw materials are fully contacted and mixed. The protective cover 2 and sealing cover 3 at the top of the outer cylinder 1 and inner cylinder 4 form a closed structure. The sealing rubber ring enhances the sealing performance, preventing material dust from leaking out and protecting the internal structure from external contamination. The stable support of the support legs 11 ensures that the whole machine remains balanced when running at high speed, avoiding the impact of vibration on the mixing effect.

[0044] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A plastic film production processing raw material mixer, characterized in that, Includes an outer cylinder (1) and an inner cylinder (4); The inner cylinder (4) is rotatably installed in the center inside the outer cylinder (1), and a cavity is formed between the inner cylinder (4) and the outer cylinder (1). A rotating shaft (5) is vertically installed at the center of the outer cylinder (1) and penetrating the outer cylinder (1) and the inner cylinder (4). Active stirring blades (6) are fixedly installed on the outer wall of the rotating shaft (5) and around the inner side of the inner cylinder (4). Several sets of passive stirring blades (7) are equidistantly installed on the inner wall of the inner cylinder (4) along the circumferential direction. A drive gear disk (13) is installed on the outer wall of the rotating shaft (5) and below the outer cylinder (1). A transmission gear disk (15) is meshed around the bottom of the outer cylinder (1) and around the drive gear disk (13). A driven gear disk (16) is meshed around the bottom of the outer cylinder (1) and outside each set of transmission gear disks (15). A rotating rod (14) is provided at the inner center of the driven gear disk (16). The top of the rotating rod (14) passes through the outer cylinder (1) and a transmission gear (9) is installed around the inside of the outer cylinder (1). A toothed ring (8) is installed around the lower outer wall of the inner cylinder (4). The transmission gear (9) meshes with the toothed ring (8).

2. The plastic film production processing raw material mixing machine according to claim 1, characterized in that, A protective cover (2) is installed at the top connection of the outer cylinder (1) and the inner cylinder (4), and a sealing cover (3) is installed on the top of the protective cover (2) by means of a movable connection.

3. The raw material mixing machine for plastic film production and processing according to claim 1, characterized in that, The outer cylinder (1) has four fixed support legs (11) at the four corners of its bottom.

4. A raw material mixing machine for plastic film production and processing according to claim 3, characterized in that, The inner side of the four sets of support legs (11) is fixedly welded with motor bases (17), and the top of the motor bases (17) is fixedly installed with a stirring motor (12). The output shaft of the stirring motor (12) is connected to the rotating shaft (5) by a transmission method.

5. A raw material mixing machine for plastic film production and processing according to claim 1, characterized in that, The active stirring blades (6) are arranged in a ring on the rotating shaft (5), and each group of active stirring blades (6) is equidistant.

6. A raw material mixing machine for plastic film production and processing according to claim 1, characterized in that, The passive stirring blade (7) is set at an inclined angle to the inner wall of the inner cylinder (4), and the inclined angle is 30°-60°.

7. A raw material mixing machine for plastic film production and processing according to claim 1, characterized in that, The drive gear disk (13), transmission gear disk (15) and driven gear disk (16) are all involute gears with the same module.

8. A raw material mixing machine for plastic film production and processing according to claim 2, characterized in that, A sealing rubber ring is provided between the sealing cap (3) and the protective cap (2) to enhance the sealing effect.

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