Vertical mixing machine for plastic granulation

Abstract

The utility model provides a vertical mixing machine for plastic granulation, and belongs to the technical field of plastic granulation. Comprising a motor, a speed reducer, a barrel body and a screw, the motor and the speed reducer are both fixed to the top of the barrel body, an output shaft of the speed reducer and the screw are fixed together through a coupler, the motor can drive the screw to rotate through the speed reducer, and a feeding hopper and a discharging pipe are arranged on the barrel body; the upper portion of the screw is sleeved with a one-way bearing, and the one-way bearing is locked in the anticlockwise direction. The one-way bearing is sleeved with a connecting cylinder, and a set of scraper blade frames are symmetrically welded to the peripheral face of the connecting cylinder. A mounting plate is vertically fixed to the end, close to the inner wall of the barrel body, of each scraper frame, a scraper is arranged on each mounting plate, and each scraper can horizontally slide on the mounting plate; a cleaning opening is formed in the bottom of the barrel body, and a cleaning door capable of sliding up and down is arranged on the cleaning opening. The utility model has the advantages of low energy consumption, long service life and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of plastic granulation equipment, and relates to a vertical mixer for plastic granulation. Background Art

[0002] In the process of plastic granulation, various raw materials need to be stirred evenly in a mixer first, so as to obtain plastic particle products with uniform texture in subsequent processing. Among them, the vertical mixer is widely used in the mixing process of this industry. It can lift the raw materials from the bottom of the barrel to the top by the rapid rotation of the screw, and then scatter them in an umbrella shape and return to the bottom. In this way, the raw materials are stirred up and down in the barrel, and a large amount of raw materials can be evenly mixed in a short time.

[0003] However, during the mixing process, due to the rapid movement and impact of the materials, a large amount of dust composed of material debris will inevitably be generated. These dusts will adhere to the inner wall of the barrel. Therefore, when the materials to be stirred change, we need to clean it to avoid material doping and affecting the product quality. In the prior art, there are also many vertical mixers that can automatically complete the inner wall cleaning, but most of them directly fix the cleaning scraper on the top of the screw. In the actual use process, due to the continuous generation of dust, the cleaning during the mixing process is difficult to play a role; during the mixing process, due to a large amount of materials in the barrel, a huge resistance is generated to the movement of the scraper. Therefore, the scraper fixed on the screw not only consumes a large amount of energy during operation, but also is easily damaged. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a vertical mixer for plastic granulation aiming at the above problems existing in the prior art, aiming to make it more energy-saving and the service life of the scraper longer.

[0005] The purpose of the utility model can be realized by the following technical solutions: A vertical mixer for plastic granulation, including a motor, a reducer, a barrel and a screw. The motor and the reducer are both fixed on the top of the barrel. The output shaft of the reducer is fixed to the screw through a coupling. The motor can drive the screw to rotate through the reducer. The barrel is provided with a feed hopper and a discharge pipe. Its characterized in that, a one-way bearing is sleeved on the upper part of the screw, and the one-way bearing is locked in the counterclockwise direction; a connecting cylinder is sleeved on the one-way bearing, and a group of scraper frames are symmetrically welded on the outer peripheral surface of the connecting cylinder; one end of each scraper frame close to the inner wall of the barrel is vertically fixed with a mounting plate, and each mounting plate is provided with a scraper, and each scraper can slide horizontally on the mounting plate; a cleaning port is opened at the bottom of the barrel, and a cleaning door that can slide up and down is provided on the cleaning port.

[0006] Preferably, a end cover is detachably connected to the bottom of the barrel body. An installation sleeve is fixed on the upper surface of the end cover, and a bearing is provided between the lower part of the screw rod and the installation sleeve for connection. A dust-proof cover is sleeved on the screw rod. The dust-proof cover is in the shape of an inverted bowl, and the installation sleeve is located inside the dust-proof cover.

[0007] The advantages of the present utility model are as follows:

[0008] 1. In this mixer, the structures such as the scraper frame and the scraper are connected to the screw rod through a one-way bearing, so that the mixer operation can be carried out when the screw rod rotates clockwise, and when it rotates counterclockwise, it drives the scraper to rotate, thereby realizing the automatic cleaning of the inner wall of the barrel body, with low operation energy consumption and long service life of the scraper.

[0009] 2. In this mixer, the scraper can slide horizontally on the mounting plate. Therefore, when the scraper frame rotates, the scraper automatically adheres tightly to the inner wall of the barrel body under the action of centrifugal force, so that its position can be adjusted adaptively, and the cleaning effect is better. Description of the Drawings

[0010] Figure 1 is a three-dimensional structural schematic diagram of this mixer.

[0011] Figure 2 is a front-view structural schematic diagram of this mixer.

[0012] Figure 3 is a three-dimensional structural schematic diagram of the screw rod.

[0013] In the figure, 1. Motor; 2. Reducer; 3. Barrel body; 31. Feed hopper; 32. Discharge pipe; 4. Screw rod; 5. Coupling; 61. One-way bearing; 62. Connecting cylinder; 63. Scraper frame; 64. Mounting plate; 65. Scraper; 7. Cleaning door; 81. End cover; 82. Installation sleeve; 83. Bearing; 84. Dust-proof cover. Specific Embodiments

[0014] The following are specific embodiments of the present utility model in combination with the drawings. The technical solutions of the present utility model will be further described, but the present utility model is not limited to these embodiments.

[0015] As Figure 1 、 Figure 2 and Figure 3As shown, a vertical mixer for plastic granulation includes a motor 1, a reducer 2, a barrel 3 and a screw 4. The motor 1 and the reducer 2 are fixed on the top of the barrel 3. The output shaft of the reducer 2 and the screw 4 are fixed together by a coupling 5. The motor 1 can drive the screw 4 to rotate through the reducer 2. The barrel 3 is provided with a feed hopper 31 and a discharge pipe 32; the upper part of the screw 4 is sleeved with a one-way bearing 61, and the one-way bearing 61 is locked in the counterclockwise direction; the one-way bearing 61 is sleeved with a connecting tube 62, and a group of scraper frames 63 are symmetrically welded on the outer circumference of the connecting tube 62; a mounting plate 64 is vertically fixed to one end of each scraper frame 63 close to the inner wall of the barrel 3, and each mounting plate 64 is provided with a scraper 65, and each scraper 65 can slide horizontally on the mounting plate 64; a cleaning port is opened at the bottom of the barrel 3, and a cleaning door 7 that can slide up and down is provided on the cleaning port.

[0016] In this mixer, since the scraper frame 63, scraper 65 and other structures are connected to the screw 4 through a one-way bearing 61, when the mixer is working, the screw 4 rotates clockwise, so it will not drive the scraper 65 and other components to operate, thereby making its operation energy consumption lower. When cleaning is needed, we can reverse the motor 1 to drive the screw 4 and the scraper frame 63 to rotate in the opposite direction, and the scraper 65 automatically clings to the inner wall of the barrel 3 under the action of centrifugal force to complete the scraping and cleaning operation; and when cleaning, there is no material in the barrel 3, and the operation of the scraper frame 63 will not be subject to a large blocking force, thereby effectively avoiding the scraper frame 63 from being damaged by the resistance of the material, and extending its service life; at the same time, due to the flipping of the screw 4, it can drive the air in the barrel 3 downward, and we can slide up to open the cleaning door 7 at this time, and the dust in the barrel 3 will be discharged along with the air to achieve the cleaning effect.

[0017] like Figure 2 and Figure 3 As shown, the bottom of the barrel 3 is detachably connected with an end cover 81, and a mounting sleeve 82 is fixed on the upper surface of the end cover 81, and a bearing 83 is provided between the lower part of the screw 4 and the mounting sleeve 82 to connect them, and a dust cover 84 is provided on the screw 4, and the dust cover 84 is in the shape of an inverted bowl, and the mounting sleeve 82 is located in the dust cover 84. When the mixer is running, dust can easily enter the bearing 83, and after mixing with the lubricating oil, it forms sludge, and the sludge gradually solidifies, making the bearing 83 difficult to operate, which not only increases energy consumption invisibly, but also makes the bearing 83 easily damaged. The existence of the dust cover 84 can make the dust fall outside the mounting sleeve 82 through its outer wall, thereby realizing effective protection of the bearing 83.

[0018] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A vertical mixer for plastic pelletizing, comprising a motor (1), a speed reducer (2), a barrel (3) and a screw (4). The motor (1) and the speed reducer (2) are both fixed on the top of the barrel (3). The output shaft of the speed reducer (2) is fixedly connected to the screw (4) through a coupling (5). The motor (1) can drive the screw (4) to rotate through the speed reducer (2). The barrel (3) is provided with a feed hopper (31) and a discharge pipe (32); It is characterized in that, A one-way bearing (61) is sleeved on the upper part of the screw rod (4), and the one-way bearing (61) is locked in the counterclockwise direction; a connecting cylinder (62) is sleeved on the one-way bearing (61), and a group of scraper frames (63) are symmetrically welded on the outer peripheral surface of the connecting cylinder (62); at one end of each scraper frame (63) close to the inner wall of the barrel body (3), a mounting plate (64) is vertically fixed, and a scraper (65) is provided on each mounting plate (64), and each scraper (65) can slide horizontally on the mounting plate (64); a cleaning port is formed at the bottom of the barrel body (3), and a cleaning door (7) that can slide up and down is provided on the cleaning port.

2. The vertical mixer for plastic granulation according to claim 1, characterized in that, A end cover (81) is detachably connected to the bottom of the barrel body (3), a mounting sleeve (82) is fixed on the upper surface of the end cover (81), and a bearing (83) is provided between the lower part of the screw rod (4) and the mounting sleeve (82) for connection. A dust-proof cover (84) is sleeved on the screw rod (4), the dust-proof cover (84) is in the shape of an inverted bowl, and the mounting sleeve (82) is located inside the dust-proof cover (84).

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