granulator

Abstract

This utility model discloses a granulator, belonging to the field of grinding wheel manufacturing. It includes a base and a hopper fixedly installed on the base. The hopper is used for feeding. The granulator also includes a screen cylinder, a pressure knife, a grinding knife, a scraper, a receiving tray, and a scraper plate. The screen cylinder is fixed below the hopper, and a screen is provided at the bottom of the screen cylinder. The pressure knife and grinding knife are rotatably installed inside the screen cylinder. The pressure knife presses against the grinding knife, causing the grinding knife to contact the screen and extrude the mixture from the screen. The scraper is rotatably installed outside the screen cylinder and scrapes the mixture extruded from the screen to form granules. The receiving tray is located below the screen cylinder and the scraper to receive the scraped-off granules. The scraper is located above the receiving tray to scrape the granules off the receiving tray. Through this design, the scraper scrapes the mixture extruded from the screen from the screen, and the scraper scrapes the granules off the receiving tray, preventing granules from sticking to the screen or receiving tray, thus improving the uniformity of abrasive particle size and production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of grinding wheel manufacturing, and in particular to granulators. Background Technology

[0002] Abrasive grains, as hard particles (such as alumina, silicon carbide, or diamond) on the surface of a grinding wheel, cut directly into the workpiece material through their sharp edges, removing metals or non-metals. During the cutting process, the hardness (e.g., diamond with a Mohs hardness of 10) and sharpness of the abrasive grains determine the cutting efficiency.

[0003] In the abrasive manufacturing process, abrasive materials (such as alumina, silicon carbide, or diamond) are mixed with binders (ceramics, resins, metals, etc.) in a specific ratio and then granulated into particles of a certain size using a granulator. However, when the existing mixture has excessive viscosity, the granules produced by extrusion stick to the screen or receiving plate and are not easily detached. This causes newly produced particles to adhere to the previous ones, affecting the consistency of the abrasive particle size. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, one of the objectives of this utility model is to provide a granulator in which particles do not stick to the screen or receiving plate, thereby improving the uniformity of abrasive particle size.

[0005] One of the objectives of this utility model is achieved through the following technical solution: A pellet mill includes a base and a hopper fixedly installed on the base. The hopper is used for feeding material. The pellet mill also includes a screen cylinder, a pressure knife, a grinding knife, a scraper, a receiving tray, and a scraper plate. The screen cylinder is fixed below the hopper, and a screen is provided at the bottom of the screen cylinder. The pressure knife and the grinding knife are rotatably installed inside the screen cylinder. The pressure knife presses against the grinding knife, causing the grinding knife to contact the screen and extrude the mixture from the screen. The scraper is rotatably installed outside the screen cylinder and scrapes the mixture extruded from the screen to form pellets. The receiving tray is located below the screen cylinder and the scraper to receive the scraped-off pellets. The scraper plate is located above the receiving tray and scrapes the pellets off the receiving tray.

[0006] Furthermore, the receiving tray is rotatably mounted on the base, and the scraper is fixedly mounted on the base.

[0007] Furthermore, the projection of the scraper in the vertical direction forms an angle with the radius of the receiving tray.

[0008] Furthermore, the pellet mill also includes a enclosure fixed to the base, the enclosure surrounding the receiving tray, the enclosure having a discharge port, and the scraper located inside the enclosure.

[0009] Furthermore, the screen cylinder includes a cylinder body, a first screen, and a second screen, with the first screen and the second screen respectively fixed to both ends of the cylinder body.

[0010] Furthermore, the pellet mill also includes a rotating shaft, on which the pressing knife and the grinding knife are both mounted.

[0011] Furthermore, the pressing knife includes multiple cutting sections, each of which is straight and a gap is formed between adjacent cutting sections.

[0012] Furthermore, the number of blades is three, and the included angle between two adjacent blades is 120 degrees.

[0013] Furthermore, there are multiple scrapers arranged around the screen.

[0014] Furthermore, the projection of each scraper in the vertical direction forms an angle with the radius of the screen cylinder.

[0015] Compared to existing technologies, this utility model granulator includes a base and a hopper fixedly installed on the base. The hopper is used for feeding. The granulator also includes a screen cylinder, a pressure knife, a grinding knife, a scraper, a receiving tray, and a scraper plate. The screen cylinder is fixed below the hopper, and a screen is provided at the bottom of the screen cylinder. The pressure knife and the grinding knife are rotatably installed inside the screen cylinder. The pressure knife presses against the grinding knife, causing the grinding knife to contact the screen and extrude the mixture from the screen. The scraper is rotatably installed outside the screen cylinder. The scraper scrapes the mixture extruded from the screen from the screen to form granules. The receiving tray is located below the screen cylinder and the scraper to receive the scraped-off granules. The scraper is located above the receiving tray to scrape the granules off the receiving tray. Through the above design, the scraper scrapes the mixture extruded from the screen from the screen, and the scraper scrapes the granules off the receiving tray, preventing granules from sticking to the screen or receiving tray, thus improving the uniformity of the abrasive particle size and production efficiency. Attached Figure Description

[0016] Figure 1 This is a front view of the pellet mill of this utility model; Figure 2 for Figure 1 A partial structural diagram of a pellet mill; Figure 3 This is a top view of the granulator of this utility model; Figure 4 for Figure 3 A partial structural diagram of a pellet mill.

[0017] In the diagram: 10, base; 20, hopper; 30, screen cylinder; 31, cylinder body; 32, first screen; 33, second screen; 40, rotating shaft; 50, pressure knife; 60, grinding knife; 70, scraper; 80, receiving tray; 90, scraper; 100, enclosure; 101, discharge port. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or it can be fixed through another intermediate component. When a component is said to be "connected to" another component, it can be directly connected to the other component or it may be fixed through another intermediate component. When a component is said to be "set on" another component, it can be set directly on the other component or it may be set through another intermediate component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0021] Please see Figures 1 to 4 This utility model granulator is used to form a mixture into granules. In this embodiment, the granules are abrasive particles, and the mixture is formed by mixing abrasive and binder in a certain proportion, resulting in high viscosity.

[0022] The pellet mill includes a base 10, a hopper 20, a screen cylinder 30, a rotating shaft 40, a pressing knife 50, a grinding knife 60, a scraper 70, a receiving tray 80, a scraper 90, and a surrounding barrier 100.

[0023] The base 10 is used to install the hopper 20, screen cylinder 30, rotating shaft 40, pressing knife 50, grinding knife 60, scraper 70, receiving tray 80, scraper 90 and enclosure 100.

[0024] The hopper 20 is used for feeding the mixture. Specifically, the hopper 20 is fixed to the base 10 and is located above the screen cylinder 30, the pressure knife 50, the grinding knife 60, the scraper 70, and the receiving tray 80. The hopper 20 has a conical structure to facilitate feeding. The bottom of the hopper 20 is connected to the screen cylinder 30 and communicates with the interior of the screen cylinder 30.

[0025] The screen cylinder 30 is used to extrude the mixture. Specifically, the screen cylinder 30 is equipped with a screen, and the adhered mixture is extruded through the screen to form granules. The screen is disposed on the side wall of the screen cylinder 30. In this embodiment, the screen cylinder 30 includes a cylinder body 31, a first screen 32, and a second screen 33, which are respectively fixed to both ends of the cylinder body 31. When the screen cylinder 30 is in use, the second screen 33 at the bottom is active. Because the grinding blade 60 and the mixture rub against the screen when the screen is active, the screen is easily damaged. This application has a double screen design. When the second screen 33 at the bottom is damaged, the screen cylinder 30 is reversed. At this time, the first screen 32 is at the bottom and is active. This design can improve the service life of the screen cylinder 30 and reduce the frequency of screen cylinder 30 replacement.

[0026] The rotating shaft 40 is rotatably mounted inside the screen cylinder 30. The rotating shaft 40 is used to drive the pressure knife 50 and the grinding knife 60 to rotate.

[0027] The pressure cutter 50 is mounted on the rotating shaft 40 and can move along the axial direction of the rotating shaft 40, so that the pressure cutter 50 presses against the grinding cutter 60. The pressure cutter 50 includes a blade section. When the pressure cutter 50 rotates, it has a crushing effect on the mixture, preventing the mixture from sticking and hardening in the hopper 20 and the screen cylinder 30 due to accumulation. Specifically, there are multiple blade sections, and gaps are formed between the multiple blade sections. In this embodiment, each blade section is straight, there are 3 blade sections, and the included angle between two adjacent blade sections is 120 degrees.

[0028] The grinding blade 60 is positioned corresponding to the screen and crushes the mixture inside the screen, extruding the mixture through the screen to form granules.

[0029] A scraper 70 surrounds the screen and scrapes off the particles extruded from the screen. Specifically, there are multiple scrapers 70, which are rotatably mounted on the base 10. The vertical projection of each scraper 70 forms an angle with the radius of the screen cylinder 30, so that the end of the scraper 70 makes inclined contact with the screen wall.

[0030] The receiving tray 80 is located below the screen cylinder 30. Since the particles are squeezed out from the side wall at the bottom of the screen cylinder 30, the diameter of the receiving tray 80 is larger than the diameter of the screen cylinder 30. To prevent particles from sticking to the receiving tray 80, the receiving tray 80 is rotatably mounted on the base 10, and the scraper 90 is fixed to the base 10. When the receiving tray 80 rotates, the scraper 90 hangs the particles on the receiving tray 80 onto the discharge port 101. Specifically, there are multiple scrapers 90 arranged in a ring, with the vertical projection of each scraper 90 forming an angle with the radius of the screen cylinder 30. The projection of the scraper 90 forms an acute angle with the projection of the scraper 70.

[0031] The enclosure 100 is fixed to the base 10 and surrounds the receiving tray 80 to prevent particles from falling outside the receiving tray 80. Specifically, the enclosure 100 is provided with a discharge port 101.

[0032] The granulator of this invention features a double-screen design in its screen cylinder 30. When the second screen 33 at the bottom is damaged, the screen cylinder 30 is reversed, at which point the first screen 32 is at the bottom and operates. This design extends the service life of the screen cylinder 30 and reduces the frequency of replacement. The scraper 70 scrapes the mixture extruded from the screen off the screen, and the scraper 90 scrapes the particles off the receiving tray 80, preventing particles from sticking to the screen or the receiving tray 80, thus improving the uniformity of abrasive particle size and production efficiency.

[0033] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the concept of this utility model. These are all equivalent modifications and improvements made to the above embodiments based on the essential technology of this utility model, and all of these fall within the protection scope of this utility model.

Claims

1. A pellet mill, comprising a base and a hopper fixedly installed on the base, the hopper being used for feeding material, characterized in that: The granulator also includes a screen cylinder, a pressure knife, a grinding knife, a scraper, a receiving tray, and a scraper plate. The screen cylinder is fixed below the hopper, and a screen is provided at the bottom of the screen cylinder. The pressure knife and the grinding knife are rotatably installed inside the screen cylinder. The pressure knife presses against the grinding knife, causing the grinding knife to contact the screen and extrude the mixture from the screen. The scraper is rotatably installed outside the screen cylinder and scrapes the mixture extruded from the screen to form granules. The receiving tray is located below the screen cylinder and the scraper to receive the scraped-off granules. The scraper plate is located above the receiving tray to scrape the granules off the receiving tray.

2. The granulator according to claim 1, characterized in that: The receiving tray is rotatably mounted on the base, and the scraper is fixedly mounted on the base.

3. The granulator according to claim 2, characterized in that: The vertical projection of the scraper forms an angle with the radius of the receiving tray.

4. The granulator according to claim 2, characterized in that: The pellet mill also includes a enclosure fixed to the base, the enclosure surrounding the receiving tray, the enclosure having a discharge port, and the scraper located inside the enclosure.

5. The granulator according to claim 1, characterized in that: The screen cylinder includes a cylinder body, a first screen, and a second screen, with the first screen and the second screen respectively fixed to both ends of the cylinder body.

6. The granulator according to claim 1, characterized in that: The pellet mill also includes a rotating shaft, on which the pressing knife and the grinding knife are both mounted.

7. The granulator according to claim 1, characterized in that: The pressing knife includes multiple blades, each blade is straight, and a gap is formed between adjacent blades.

8. The granulator according to claim 7, characterized in that: The number of blades is three, and the included angle between two adjacent blades is 120 degrees.

9. The granulator according to claim 1, characterized in that: The number of scrapers is multiple, and the multiple scrapers are arranged around the screen.

10. The granulator according to claim 9, characterized in that: The vertical projection of each scraper forms an angle with the radius of the screen cylinder.

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