A device for making pencil lead material

Abstract

The utility model relates to grinding device technical field especially for a kind of pencil core material production is connected machine grinding device, including three-roll grinder, and be used for material crushing to be provided with broken material mechanism on the three-roll grinder, and broken material mechanism includes: main component, including fixed in the broken material box of three-roll grinder top, two roller shafts are rotatably installed between left and right ends in broken material box interior, several broken heads are fixed on the outer wall of roller shaft, and the broken head on two roller shafts is staggered arrangement, and the top of broken material box is fixed with feeding hopper;Pushing material component, including the mounting bracket of fixed in the rear end of feeding hopper inner wall, the hydraulic cylinder is installed on the mounting bracket upper end, the lower output end of hydraulic cylinder is fixed with pressing plate, and the upper end of pressing plate is fixed with protective shell;Through forced pressure material and collaborative crushing, solve material jam and bridging problem, improve crushing uniformity and eating smoothness;It has self-cleaning function simultaneously, prevent mechanism jam and wear, enhance equipment running stability and automation level.

Description

Technical Field

[0001] This utility model relates to the field of grinding equipment technology, specifically to an in-line grinding device for making pencil lead materials. Background Technology

[0002] In the pencil lead manufacturing process, material grinding is one of the key steps that determines the quality and performance of the finished product; with the continuous improvement of industrial automation, higher requirements are placed on the continuous and integrated operation of production equipment. According to publication number CN209885888U, a three-roll mill for pencil lead is disclosed. This technology discloses that it includes a frame body, roller one, roller two, roller three, and a storage bin. A U-shaped groove is formed in the middle of the frame body. Roller one, roller two, and roller three are fixed above the inside of the groove. A discharge plate, which is inclined, is fixed to the side of the frame body near roller three. Adjustment buttons are symmetrically fixed to both sides of the top of the frame body. One, adjustment buttons are symmetrically fixed on one side of the frame body near the unloading plate. Two, baffles are fixed on both sides of the inside of the groove and on both sides of roller one, roller two and roller three. A feeding device is fixed on the side of the groove surface away from the unloading plate. The feeding device includes a moving plate, a spur gear, a worm gear, a worm shaft and a support column. The moving plate is located below roller one and roller two. A spur gear is fixed at the bottom of the moving plate and the bottom of the moving plate is provided with gear teeth that are compatible with the spur gear. In the existing production of pencil lead grinding materials, since the raw materials are often viscous or flaky, bridging and blockage are prone to occur during the feeding stage before entering the three-roll mill. This results in the material not being able to enter the grinding area evenly and continuously, which in turn affects the smooth progress of subsequent grinding processes and the continuity of the overall production process. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides an in-line grinding device for pencil lead production. By using forced pressing and coordinated crushing, it solves the problems of material blockage and bridging, improving crushing uniformity and feeding smoothness. At the same time, it has a self-cleaning function to prevent mechanical jamming and wear, enhancing the stability and automation level of equipment operation.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a grinding device for producing pencil lead materials, comprising a three-roll mill, wherein the three-roll mill is equipped with a crushing mechanism for crushing materials, the crushing mechanism comprising: The main components include a crushing box fixed to the top of the three-roll mill, two rollers rotatably installed between the left and right ends inside the crushing box, several crushing heads fixed on the outer wall of the rollers, and the crushing heads on the two rollers are staggered. A feeding hopper is fixed to the top of the crushing box. The feeding assembly includes a mounting bracket fixed to the rear end of the inner wall of the feeding hopper. A hydraulic cylinder is mounted on the upper end of the mounting bracket. A pressure plate is fixed to the lower output end of the hydraulic cylinder. A protective shell is fixed to the upper end of the pressure plate.

[0005] Preferably, the feeding assembly further includes guide rails fixed on the left and right sides of the front end of the mounting frame, with sliders slidably mounted on the guide rails and pressure plates fixed on the sliders.

[0006] Preferably, the feeding assembly further includes scrapers fixed on the left and right sides of the bottom of the pressure plate, and the scraping surface of the scrapers is adapted to the contour of the guide rail.

[0007] Preferably, the main component further includes a gear fixed to the right end of the roller shaft, and the two gears mesh for transmission. A driven pulley is fixed to the left end of one of the roller shafts, and a transmission pulley is fixed to the left end of one of the rollers on the three-roll mill. A belt is installed between the transmission pulley and the driven pulley.

[0008] Preferably, the crushing mechanism further includes a cutter bed fixed to the front end of the three-roll mill, and the front end of the three-roll mill is provided with an inclined conveyor belt.

[0009] Preferably, the discharge port of the three-roll mill, the drop point of the cutter bed, and the receiving end of the inclined conveyor belt are arranged in a corresponding manner, one above the other.

[0010] Beneficial effects This invention provides an in-line grinding device for making pencil lead materials. Compared with the prior art, it has the following advantages: 1. After the flaky or lumpy material is fed into the hopper, the hydraulic cylinder is activated to drive the pressure plate downward, forcing the material into the crushing box. At the same time, the two rollers rotate in opposite directions, and the crushing heads arranged in a staggered manner on their surfaces shear, tear and squeeze the material to achieve efficient crushing. This solves the problem of bridging and clogging of viscous or flaky materials during the feeding process, ensuring that the material is crushed evenly and continuously into a particle size suitable for the three-roll mill, improving the feeding smoothness, grinding uniformity and automation and stability of the entire production line in subsequent grinding processes.

[0011] 2. When the pressure plate reciprocates along the guide rail under the drive of the hydraulic cylinder, the scraper fixed on it moves synchronously. By using its contact with the surface of the guide rail, it continuously scrapes off any material debris that may adhere to or splash onto the guide rail. This prevents sticky materials from accumulating and hardening on the surface of the guide rail, and avoids problems such as slider movement jamming, increased wear, or even failure caused by contaminants. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the front end of this utility model; Figure 2 This is a three-dimensional structural diagram of the rear end of this utility model; Figure 3 This is a schematic diagram of the material crushing mechanism in this utility model; Figure 4 This is a schematic diagram of the material pushing component in this utility model.

[0013] In the diagram: 1. Three-roll mill; 2. Crushing mechanism; 21. Main component; 211. Crushing box; 212. Roller; 213. Crushing head; 214. Feed hopper; 215. Gear; 216. Driven pulley; 217. Transmission pulley; 218. Belt; 22. Pushing assembly; 221. Mounting frame; 222. Hydraulic cylinder; 223. Pressure plate; 224. Protective shell; 225. Scraper; 226. Guide rail; 227. Slider; 23. Cutter bed; 24. Inclined conveyor belt. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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.

[0015] Please see Figure 1 - Figure 4 This utility model provides a technical solution: a grinding device for making pencil lead materials, including a three-roll mill 1, a crushing mechanism 2 on the three-roll mill 1 for crushing materials, the crushing mechanism 2 including: The main component 21 includes a crushing box 211 fixed on the top of the three-roll mill 1. Two rollers 212 are rotatably installed between the left and right ends inside the crushing box 211. Several crushing heads 213 are fixed on the outer wall of the rollers 212, and the crushing heads 213 on the two rollers 212 are staggered. A feeding hopper 214 is fixed on the top of the crushing box 211. The feeding assembly 22 includes a mounting bracket 221 fixed to the rear end of the inner wall of the feeding hopper 214. A hydraulic cylinder 222 is mounted on the upper end of the mounting bracket 221. A pressure plate 223 is fixed to the lower output end of the hydraulic cylinder 222. A protective shell 224 is fixed to the upper end of the pressure plate 223.

[0016] In this embodiment, after the sheet or block material is fed into the hopper 214, the hydraulic cylinder 222 is activated to drive the pressure plate 223 to move downward, forcibly pressing the material into the crushing box 211. At the same time, the two rollers 212 rotate in opposite directions, and the crushing heads 213 arranged on their surfaces shear, tear and squeeze the material to achieve efficient crushing. This solves the problem of bridging and clogging of viscous or sheet materials during the feeding process, ensuring that the material is crushed uniformly and continuously to a particle size suitable for the three-roll mill 1, improving the feeding smoothness, grinding uniformity and automation and stability of the entire production line in subsequent grinding processes.

[0017] Specifically, the pusher assembly 22 also includes guide rails 226 fixed on the left and right sides of the front end of the mounting bracket 221. A slider 227 is slidably mounted on the guide rails 226, and the pressure plate 223 is fixed on the slider 227.

[0018] In this embodiment, when the hydraulic cylinder 222 is activated, the driving pressure is transmitted through the pressure plate 223 to the slider 227 fixed thereto, forcing the slider 227 to make a stable linear motion along the trajectory defined by the guide rail 226, thereby ensuring that the pressure plate 223 always remains vertically pressed down without swaying during the material pushing process.

[0019] Specifically, the feeding assembly 22 also includes scraper heads 225 fixed on the left and right sides of the bottom of the pressure plate 223, and the scraping surface of the scraper head 225 is adapted to the contour of the guide rail 226.

[0020] In this embodiment, when the pressure plate 223 reciprocates along the guide rail 226 under the drive of the hydraulic cylinder 222, the scraper head 225 fixed on it moves synchronously. By using its contact with the surface of the guide rail 226, it continuously scrapes off material debris that may adhere to or splash onto the guide rail 226. This prevents sticky materials from accumulating and hardening on the surface of the guide rail 226, and avoids problems such as jamming, increased wear, or even failure of the slider 227 caused by contaminants.

[0021] Specifically, the main component 21 also includes a gear 215 fixed to the right end of the roller 212, and the two gears 215 mesh for transmission. A driven pulley 216 is fixed to the left end of one of the rollers 212, and a transmission pulley 217 is fixed to the left end of one of the rollers on the three-roll mill 1. A belt 218 is installed between the transmission pulley 217 and the driven pulley 216.

[0022] In this embodiment, the rotation of the three-roll mill 1 roller is transmitted to the driven pulley 216 through the transmission pulley 217 and belt 218, thereby driving one of the roller shafts 212 to rotate. The gear 215 at the right end of the roller shaft 212 meshes with the gear 215 on the other roller shaft 212, forcing the two roller shafts 212 to rotate synchronously in opposite directions at the same linear speed. This allows the main component 21 to operate synchronously without an independent motor, reducing equipment manufacturing costs and daily energy consumption, and achieving energy-saving operation.

[0023] Specifically, the crushing mechanism 2 also includes a cutter bed 23 fixed at the front end of the three-roll mill 1, and an inclined conveyor belt 24 is provided at the front end of the three-roll mill 1.

[0024] In this embodiment, the sheet material ground by the three-roll mill 1 is carried out by the rotating rollers and scraped off the roller surface completely and efficiently by the blade bed 23 fixed at the front end at a specific angle. The scraped material then falls naturally into the receiving end of the inclined conveyor belt 24 located directly below it under the action of gravity.

[0025] Specifically, the discharge port of the three-roll mill 1, the drop point of the cutter bed 23, and the receiving end of the inclined conveyor belt 24 are arranged in a corresponding manner, one above the other.

[0026] In this embodiment, by sequentially setting up multiple three-roll mills 1 in subsequent processes and connecting each machine in series using inclined conveyor belts 24, a complete continuous grinding production line can be constructed, enabling materials to be automatically transferred and repeatedly ground between all units without any manual intervention, thereby improving production efficiency and capacity.

[0027] The working principle and usage process of this utility model are as follows: First, sheet-like or block-like materials are fed into the hopper 214. The hydraulic cylinder 222 is activated to drive the pressure plate 223 to press down steadily along the guide rail 226 under the guidance of the slider 227, forcibly pushing the material into the crushing box 211. During this process, the scraper head 225 fixed to the bottom of the pressure plate 223 scrapes away any debris that may adhere to the surface of the guide rail 226, achieving self-cleaning. The material entering the crushing box 211 is then sheared and crushed by the crushing heads 213 arranged in a staggered manner on two opposing rotating rollers 212. The double rollers 212 achieve strictly synchronous reverse rotation through the gear 215 meshing at the right end. The power comes from the transmission pulley 217 at the left end of the three-roll mill 1 roller, which is transmitted to the driven pulley 216 via the belt 218, realizing the power sharing and rhythm synchronization between the crushing mechanism 2 and the main machine. The crushed material falls into the three-roll mill 1 for grinding. The formed flake material is scraped off at a specific angle by the front cutter bed 23 as the rollers rotate. Because the discharge port of the three-roll mill 1, the drop point of the cutter bed 23, and the receiving end of the inclined conveyor belt 24 are arranged in a corresponding vertical sequence, the scraped material falls precisely to the receiving end of the inclined conveyor belt 24 under the action of gravity. Finally, the material is automatically conveyed to the next three-roll mill 1 by the inclined conveyor belt 24, and so on. Through the series connection of multiple devices and conveyor belts, a complete continuous grinding production line is formed, realizing the automatic and continuous step-by-step transfer and repeated grinding of materials between multiple units. The entire process requires no manual intervention, which significantly improves production efficiency, product quality stability, and the degree of automation of the production line.

[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0029] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A grinding apparatus for producing pencil lead materials, comprising a three-roll mill (1), characterized in that: The three-roll mill (1) is equipped with a crushing mechanism (2) for crushing materials. The crushing mechanism (2) includes: The main component (21) includes a crushing box (211) fixed on the top of the three-roll mill (1). Two rollers (212) are rotatably installed between the left and right ends inside the crushing box (211). Several crushing heads (213) are fixed on the outer wall of the rollers (212), and the crushing heads (213) on the two rollers (212) are staggered. A feeding hopper (214) is fixed on the top of the crushing box (211). The feeding assembly (22) includes a mounting bracket (221) fixed to the rear end of the inner wall of the feeding hopper (214). A hydraulic cylinder (222) is mounted on the upper end of the mounting bracket (221). A pressure plate (223) is fixed to the lower output end of the hydraulic cylinder (222). A protective shell (224) is fixed to the upper end of the pressure plate (223).

2. The in-line grinding device for producing pencil lead materials according to claim 1, characterized in that: The pusher assembly (22) also includes guide rails (226) fixed on the left and right sides of the front end of the mounting frame (221), a slider (227) is slidably mounted on the guide rails (226), and a pressure plate (223) is fixed on the slider (227).

3. The in-line grinding device for producing pencil lead materials according to claim 2, characterized in that: The feeding assembly (22) also includes scrapers (225) fixed on the left and right sides of the bottom of the pressure plate (223), and the scraping surface of the scraper (225) is adapted to the contour of the guide rail (226).

4. The in-line grinding device for producing pencil lead materials according to claim 1, characterized in that: The main component (21) also includes a gear (215) fixed to the right end of the roller (212), and the two gears (215) mesh for transmission. A driven pulley (216) is fixed to the left end of one of the rollers (212), and a transmission pulley (217) is fixed to the left end of one of the rollers on the three-roll mill (1). A belt (218) is installed between the transmission pulley (217) and the driven pulley (216).

5. The in-line grinding device for producing pencil lead materials according to claim 1, characterized in that: The crushing mechanism (2) also includes a cutter bed (23) fixed at the front end of the three-roll mill (1), and an inclined conveyor belt (24) is provided at the front end of the three-roll mill (1).

6. The in-line grinding device for producing pencil lead materials according to claim 5, characterized in that: The discharge port of the three-roll mill (1), the drop point of the cutter bed (23), and the receiving end of the inclined conveyor belt (24) are arranged in a corresponding manner, one above the other.

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