Forced demolding device of granulator

Abstract

The utility model discloses a forced demoulding device of a pelletizer, which comprises an extrusion roller, grooves used for compressing raw material powder to form are distributed on the outer surface of the extrusion roller, a through hole communicated with a roller cavity of the extrusion roller is arranged at the bottom of the groove on the extrusion roller, and a demoulding rod is arranged in a reciprocating sliding way by penetrating through the through hole. The length of the demolding rod is larger than that of the penetrating hole, a demolding plate is arranged at the end, located in the groove, of the demolding rod and covers the penetrating hole, and a gravity block for driving the demolding rod to slide is arranged at the end, located in the cylinder cavity, of the demolding rod. The forced demoulding device is simple in structure, and forced demoulding in the forming groove on the granulator can be realized without being driven by external force.

Description

Technical Field

[0001] The utility model relates to a powder compression molding technology, in particular to a forced demoulding device for a granulator. Background Art

[0002] A granulator is a device that forms powdery materials such as clay, coke, coal powder, magnesia, bauxite, dolomite, iron powder, etc. by forced extrusion. Its structure is mostly a power mechanical drive of two horizontal extrusion rollers that rotate synchronously in opposite directions. The surfaces of the two extrusion rollers are respectively provided with corresponding grooves. During granulation, the configured powdery materials are transported between the two extrusion rollers and fall into the grooves on the surfaces of the two extrusion rollers. The two extrusion rollers rotate and the corresponding grooves close to compress the powdery materials in the grooves into a preform, and the preforms are removed from the grooves when the grooves on the extrusion rollers turn downward. In order to prevent the powdery materials from being loose and easy to break, a certain amount of binder or water is often added to the powdery materials to make them compact and not easy to break. However, this also increases the adhesion of the powdery materials after forming, making it difficult to demold the preforms in the grooves after forming. At the same time, if there is less powdery material in the groove, the pressure is small and the bonding force is insufficient during compression, making it easy for the preform to be broken and remain in the grooves, making it difficult to demold. These remaining powdery materials will affect the quality of the preforms that are compressed and formed by the next groove accepting the powdery materials. In order to solve the problem of powder remaining in the groove of the extrusion roller which is difficult to demold, some granulators are currently provided with a cleaning structure for cleaning the powder remaining in the groove, and some are provided with a demolding structure in the groove for clearing the remaining powder out of the groove; however, the cleaning structure is mostly not thorough in cleaning the powder remaining in the groove, and most of the existing demolding structures are driven by external force to achieve demolding, which leads to a complex demolding structure and difficult arrangement of structural components. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a forced demoulding device for a granulator which has a simple structure and can realize demoulding of retained powder without external force.

[0004] In order to solve the above technical problems, the technical solution of the utility model is: a forced demolding device for a granulator comprises an extrusion roller, the outer surface of the extrusion roller is provided with grooves for compressing raw material powder into molding, the extrusion roller is provided with a through hole connected to the barrel cavity of the extrusion roller at the bottom of the groove, a demolding rod is provided through the through hole for reciprocating sliding, the length of the demolding rod is greater than the length of the through hole, a demolding plate is provided at one end of the demolding rod located in the groove, the demolding plate covers the through hole, and a gravity block for driving the demolding rod to slide is provided at one end of the demolding rod located in the barrel cavity.

[0005] The demoulding driving device is a gravity block arranged on one end of the demoulding rod in the barrel cavity.

[0006] As a preferred technical solution, the shape of the stripping plate is adapted to the shape of the groove bottom.

[0007] As a preferred technical solution, the stripping plate is an arc-shaped elastic sheet, and when both ends of the stripping plate abut against the surface of the groove, a gap is left between the bottom of the stripping plate and the bottom of the groove.

[0008] As a preferred technical solution, an inner cavity extending in the axial direction is arranged inside the demoulding rod, and an impact block which slides back and forth is arranged in the inner cavity.

[0009] The forced demolding device of the granulator adopts the above technical solution, including an extrusion roller, the outer surface of which is provided with grooves for compressing raw material powder into molding, the extrusion roller is provided with a through hole connected to the barrel cavity of the extrusion roller at the bottom of the groove, a demolding rod is provided through the through hole for reciprocating sliding, the length of the demolding rod is greater than the length of the through hole, a demolding plate is provided at one end of the demolding rod located in the groove, the demolding plate covers the through hole, and a gravity block for driving the demolding rod to slide is provided at one end of the demolding rod located in the barrel cavity. The utility model is composed of a demoulding plate, a demoulding rod and a gravity block. The structure is simple and practical, and it is easy to arrange on the extrusion roller. Under the action of the gravity of each gravity block, the corresponding demoulding rod is driven to slide, so that the demoulding plate in the groove on the lower side of the extrusion roller is moved to push out and remove the retained material or the blank to realize forced demoulding, and the demoulding plate in the groove on the upper side of the extrusion roller is moved back to the bottom of the groove to accommodate the powder material for subsequent compression molding. The whole demoulding action can realize forced demoulding under the driving of the gravity of the demoulding device gravity block itself, without external force or specially set force-applying components. The structure is simple and compact, and it is easy to arrange. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The following drawings are only intended to illustrate and explain the present invention, and do not limit the scope of the present invention.

[0011] Figure 1 It is a structural schematic diagram of the utility model;

[0012] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0013] Figure 3 It is a schematic diagram of an embodiment of the utility model;

[0014] Figure 4 It is a schematic diagram of the arrangement of the extrusion rollers using the utility model;

[0015] Figure 5 It is a schematic diagram of the use of the utility model;

[0016] In the figure: 1-extrusion roller; 2-groove; 3-barrel cavity; 4-perforation; 5-mold stripping rod; 6-mold stripping plate; 7-gravity block; 8-gap; 9-parison; 10-barrel seat; 11-spindle. DETAILED DESCRIPTION

[0017] Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that, in the accompanying drawings, the same reference numerals are given to components having substantially the same structure and function, and in order to make the description more concise, redundant descriptions of substantially the same components are omitted.

[0018] like Figure 1 and Figure 2 As shown, the forced demoulding device of the granulator comprises an extrusion roller 1. The extrusion roller 1 mostly adopts a cylindrical barrel, and barrel seats 10 for installing a main shaft 11 are fixedly sleeved at both ends of the barrel; grooves 2 for compressing raw material powder into shape are distributed on the outer surface of the extrusion roller 1. The grooves 2 can be set to a hemispherical, cylindrical or other shape according to the requirements of the product. A through hole 4 connecting to the barrel cavity 3 of the extrusion roller 1 is arranged at the bottom of the groove 2 on the extrusion roller 1, and a demoulding rod 5 is arranged to slide back and forth through the through hole 4. The length of the demoulding rod 5 is greater than the length of the through hole 4. A demoulding plate 6 is arranged at one end of the demoulding rod 5 located in the groove 2. The demoulding plate 6 covers the through hole 4 to shield the powdery material, and a gravity block 7 for driving the demoulding rod 5 to slide is arranged at one end of the demoulding rod 5 located in the barrel cavity 3. The gravity of the gravity block 7 drives the corresponding demoulding rod 5 to slide, so that the demoulding plate 6 located in the groove 2 on the lower side of the extrusion roller 1 is pushed down to realize forced demoulding, and the demoulding plate 6 located in the groove 2 on the upper side of the extrusion roller 1 is moved back to the position for material storage. The length of the demoulding rod 5 is greater than the length of the perforation 4 to ensure that the demoulding plate 6 is pushed out and returned in the groove 2. The demoulding rod 5 can be detachably connected to the gravity block 7 and the demoulding rod 5 and the demoulding plate 6 are integrally arranged, the demoulding rod 5 and the demoulding plate 6 can be detachably connected and the demoulding rod 5 and the gravity block 7 are integrally arranged, or the demoulding rod 5 and the demoulding plate 6 and the demoulding rod 5 and the gravity block can be detachably connected to adapt to different installation working environments.

[0019] like Figure 1 and Figure 2 As shown, the shape of the stripper plate 6 is adapted to the shape of the bottom of the groove 2, so that the stripper plate 6 is close to the bottom of the groove 2 after returning to its original position, which is conducive to the molding of the powder material and also reduces the powder material falling into the perforation 4 to affect the sliding of the stripper rod 5. In addition, the stripper plate 6 can be in the form of a thin sheet, which is conducive to the molding of the powder material.

[0020] like Figure 3As shown, as an embodiment of the stripping plate 6, the stripping plate 6 is an arc-shaped elastic sheet. When the two ends of the stripping plate 6 are against the surface of the groove 2, a gap 8 is left between the bottom of the stripping plate 6 and the bottom of the groove 2. In this way, when compressing the powdered material in the groove 2, the stripping plate 6 can be squeezed to stick to the bottom of the groove 2 to facilitate the molding of the blank 9. After the compression is completed, the stripping plate 6 has a rebound tendency, which helps the gravity block 7 to drive the stripping rod 5 to slide and push the stripping plate 6 out to achieve forced demolding.

[0021] In addition, as an embodiment of the demolding rod 5, the demolding rod 5 is provided with an inner cavity extending in the axial direction (not shown in the figure), and a reciprocating impact block (not shown in the figure) is provided in the inner cavity, and a cylindrical impact block is preferably used; because the rotation speed of the extrusion drum 1 of the granulator such as the coal briquette extruder is usually between 20-40r / min, and the rotation speed is relatively low, so the impact block is less affected by the centrifugal effect of the rotation of the extrusion drum 1, so that the impact block generally slides to the lower end of the inner cavity of the demolding rod 5, that is, when the demolding rod 5 is located at the lower side of the extrusion drum 1, the impact block will slide to the side of the demolding plate 6, and by hitting the demolding rod 5, it is beneficial for the gravity block 7 to drive the demolding rod 5 to slide, so that the demolding plate 6 is pushed out to realize forced demolding; and when the demolding rod 5 is located at the upper side of the extrusion drum 1, the impact block will slide to the side of the gravity block 7, and by hitting the demolding rod 5, it is beneficial for the gravity block 7 to drive the demolding rod 5 to slide, so that the demolding plate 6 returns to its position and is close to the bottom of the groove 2.

[0022] like Figure 4 and Figure 5 As shown, the utility model is arranged at the groove 2 for compressing raw material powder into shape on the extrusion roller 1 of the granulator. The two extrusion rollers 1 of the granulator are arranged horizontally side by side and rotate towards each other under the drive of the granulator power system. The configured powdered coal and other powdered materials are sent to between the two extrusion rollers 1 by the feeding system and retained in the groove 2. When the two extrusion rollers 1 rotate towards each other and the grooves 2 corresponding to each other on the two extrusion rollers 1 are closed, the powdered materials in the groove 2 are compressed and formed into a preform 9. The two extrusion rollers 1 continue to rotate downward, and the preform 9 basically falls out of the groove 2 by its own weight and falls onto the conveying system, while the material attached to the groove 2 that has not fallen out As the extrusion drum 1 continues to rotate, the demolding rods 5 at each groove 2 slide under the action of gravity of the gravity block 7 to move the demolding plate 6 in the groove 2, and the groove 2 with material or preform 9 retained therein pushes out the retained material or preform 9 by the moved demolding plate 6 to achieve forced demolding, and when the extrusion drum 1 continues to rotate so that the groove 2 is located on the upper side of the extrusion drum 1, the demolding rods 5 slide under the action of gravity of the gravity block 7 to return the demolding plate 6 in the groove 2 to the bottom of the groove 2 for accommodating the powdered material for subsequent compression molding, and the entire demolding action can achieve forced demolding under the drive of the gravity of the demolding device gravity block 7 itself.

[0023] In the description of the present invention, it is necessary to understand that the terms indicating orientation or positional relationship in the present invention are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] As described above, the embodiments of the present invention have been specifically described above, but the present invention is not limited thereto. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations or substitutions can be made according to design requirements or other factors, and they are within the scope of the attached claims and their equivalents.

Claims

1. A forced demoulding device for a granulator, comprising an extrusion drum, the outer surface of which is provided with grooves for compressing raw material powder into shape, characterized in that: The extrusion roller is provided with a through hole connected to the cylinder cavity of the extrusion roller at the bottom of the groove, a demolding rod is provided through the through hole to slide back and forth, the length of the demolding rod is greater than the length of the through hole, a demolding plate is provided at one end of the demolding rod located in the groove, the demolding plate covers the through hole, and a gravity block is provided at one end of the demolding rod located in the cylinder cavity to drive the demolding rod to slide.

2. The forced demoulding device for a granulator according to claim 1, characterized in that: The shape of the stripping plate is adapted to the shape of the groove bottom.

3. The forced demoulding device for a granulator according to claim 1, characterized in that: The stripping plate is an arc-shaped elastic sheet. When both ends of the stripping plate abut against the surface of the groove, a gap is left between the bottom of the stripping plate and the bottom of the groove.

4. The forced demoulding device for a granulator according to any one of claims 1 to 3, characterized in that: An inner cavity extending in the axial direction is arranged inside the demoulding rod, and an impact block which slides back and forth is arranged in the inner cavity.

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