A pelletizing blade for a pellet mill and a cutting control method

Abstract

This invention relates to the field of granulator blade technology, specifically to a granulator blade for a granulator and a cutting control method. The blade includes an outer cylinder with one open end, multiple blade holders, and a first adjustment mechanism. The blade holders are equidistantly arranged around the outer cylinder, and each blade holder has a fixed cutting blade. First connecting rods are hinged to both ends of one side of each blade holder, and the other ends of second connecting rods are hinged to the outer wall of the outer cylinder. The first adjustment mechanism is used to simultaneously adjust the expansion or contraction of the multiple blade holders. The first adjustment mechanism includes a threaded sleeve threaded to one end of the outer cylinder, with multiple connecting posts installed around the threaded sleeve. Multiple sliders are slidably arranged around the outer cylinder, and the other ends of the connecting posts are respectively fixed to one side of the sliders. Second connecting rods are hinged to each slider, and the other ends of the second connecting rods are respectively hinged to one side of each blade holder. This invention allows multiple cutting blades to be adjusted simultaneously, ensuring uniform adjustment distances and accelerating the adjustment speed.

Description

Technical Field

[0001] This invention relates to the field of pelletizing blade technology, and more particularly to a pelletizing blade for a pellet mill and a cutting control method. Background Technology

[0002] Dry granulation is a method of uniformly mixing drugs with diluents, disintegrants, lubricants, etc., compressing them into strips or flakes, and then grinding and cutting them into the desired particle size. Current dry granulation machines primarily generate the desired particle size through the extrusion and cutting of the material by high-speed rotating granulating blades and a screen. The extruded material flakes are cut into fragments by the crushing blades, and the unidirectionally rotating granulating blades push these fragments against the screen for grinding and cutting. The main factors affecting the granulation effect are the screen aperture size, the rotation speed of the granulating blades, and the gap between the granulating blades and the screen. Generally, the screen aperture is fixed, and the rotation speed of the granulating blades is easy and quick to adjust. Therefore, the main factor affecting the granulation effect is the control of the gap between the granulating blades and the screen, and this gap can be adjusted in most common dry granulation machines.

[0003] However, existing adjustment methods generally involve cutting a slot in the blade holder and using screws to adjust the position of the cutter on the blade holder. Since there are usually multiple sets of single-piece cutters around the blade holder, this adjustment method requires adjusting each one individually, which is too slow and makes it difficult to ensure that the adjustment distance of each cutter is the same (when multiple sets of cutters are working, they rotate in a circle, and the distance between each cutter and the blade holder must be kept the same), making it inconvenient to use. Summary of the Invention

[0004] To achieve the above objectives, the present invention provides a pelletizing blade for a pelletizer and a cutting control method thereon.

[0005] A pelletizing cutter for a pellet mill includes an outer cylinder with one open end, multiple cutter holders, and a first adjusting mechanism. The cutter holders are equidistantly arranged around the outer cylinder, and each cutter holder is fixed with a cutting blade. A first connecting rod is hinged to both ends of one side of each cutter holder, and the other end of each second connecting rod is hinged to the outer wall of the outer cylinder. The first adjusting mechanism is used to simultaneously adjust the opening or closing of the multiple cutter holders. The first adjusting mechanism includes a threaded sleeve threaded to one end of the outer cylinder, and multiple connecting posts are installed around the threaded sleeve. Multiple sliders are slidably arranged around the outer cylinder, and the other ends of the multiple connecting posts are respectively fixed to one side of the multiple sliders. A second connecting rod is hinged to each slider, and the other end of each of the multiple second connecting rods is respectively hinged to one side of the cutter holder.

[0006] Furthermore, an end ring is fitted onto one end of the outer wall of the threaded sleeve, and the end ring is rotatably connected to the threaded sleeve. One end of each of the multiple connecting posts is fixed to one side of the end ring.

[0007] Furthermore, the outer cylinder has an annular cavity around its interior, and the sliders are all slidably disposed within the annular cavity. The outer cylinder has multiple strip grooves around its outer wall that communicate with the annular cavity, and one end of each slider passes through one of the multiple strip grooves.

[0008] Furthermore, each side of the blade holder has a mounting slot, and the cutter is inserted into the mounting slot. Positioning holes are opened on both sides of the cutter. A fixed positioning head is provided at one end of the mounting slot, and a movable positioning head is movably provided on the other side of the mounting slot. The fixed positioning head and the movable positioning head are used to position the two positioning holes respectively. A fastening screw is fixed at the other end of the movable positioning head, and the other end of the fastening screw extends to the outside.

[0009] Furthermore, the bottom of the cutter has a positioning groove, and the bottom wall of the mounting groove is fixed with a positioning protrusion, and the positioning groove is adapted to the positioning protrusion.

[0010] Furthermore, one end of the threaded sleeve is fitted with a rubber sleeve, and the rubber sleeve has anti-slip texture.

[0011] Furthermore, it also includes an inner cylinder that is slidably connected to the inside of the outer cylinder. A second adjustment mechanism is provided between the inner cylinder and the outer cylinder. The outer cylinder is mounted on the drive shaft of the drive system through the inner cylinder.

[0012] Furthermore, the second adjustment mechanism includes a threaded column rotatably connected to one end of the inner cylinder, a nut threadedly connected to the threaded column, a plurality of connecting rods fixed to the outer wall of the nut, the other end of each connecting rod being fixed to the inner wall of the outer cylinder, the other end of the threaded column extending into the threaded sleeve and coaxially arranged therewith, and a hexagonal groove being opened at one end of the threaded column.

[0013] Furthermore, the inner cylinder has multiple limiting grooves around its outer wall, and the inner wall of the outer cylinder has multiple limiting protrusions around its outer wall. The multiple limiting grooves are slidably connected to the multiple limiting protrusions.

[0014] A method for controlling the cutting of a pelletizing blade in a pellet mill, comprising the following steps:

[0015] Step 1: During operation, the drive system will rotate the outer cylinder by installing the inner cylinder, causing the knife holder and cutter to rotate, thus performing the cutting and granulation operation;

[0016] Step 2: The cutting angle of the cutter needs to be adjusted. This can be done through the first adjustment mechanism, which involves adjusting the position of the connecting column by rotating the threaded sleeve, and then adjusting the position of the cutter holder by the slider and connecting rod, thereby achieving precise control of the cutting angle.

[0017] Step 3: If the depth or position of the cutting blade needs to be adjusted, the positioning of the cutting blade can be adjusted inside the tool holder, that is, by fixing the positioning head, moving the positioning head and tightening the screws to adjust the position of the cutting blade in the mounting slot.

[0018] Step 4: The position between the entire pellet mill cutter assembly and the drive shaft needs to be adjusted. This can be achieved by rotating the threaded column of the second adjustment mechanism. This adjustment can affect the relative position between the inner and outer cylinders, thereby achieving the purpose of adjusting the position of the entire cutter assembly.

[0019] Step 5: The cutting angle, cutting depth, and tool assembly position can all be precisely adjusted to meet different granulation requirements and achieve efficient and precise granulation operations.

[0020] The beneficial effects of this invention are:

[0021] The present invention, through the provision of a first adjustment mechanism, enables multiple cutters to be adjusted together, and ensures uniform adjustment distance, thereby accelerating the adjustment speed.

[0022] The present invention, through the provision of a second adjustment mechanism, allows for readjustment of the blade holder when its overall position shifts after adjustment, thus preventing parts of the blade holder from failing to be granulated. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a three-dimensional schematic diagram of an embodiment of the present invention;

[0025] Figure 2 This is a schematic planar cross-sectional view of an embodiment of the present invention;

[0026] Figure 3 This is a schematic diagram of the mounting inner cylinder and the first adjustment mechanism according to an embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram of the adjustment mechanism according to an embodiment of the present invention;

[0028] Figure 5 This is a schematic diagram of the installation inner cylinder according to an embodiment of the present invention;

[0029] Figure 6 This is a schematic diagram of the blade holder and cutting blade according to an embodiment of the present invention;

[0030] Figure 7This is a schematic cross-sectional view of the tool holder according to an embodiment of the present invention.

[0031] The diagram is marked as follows:

[0032] 1. Outer cylinder; 2. Inner cylinder mounting; 3. Tool holder; 4. Cutting blade; 5. Strip groove; 6. End ring; 7. First connecting rod; 8. Second connecting rod; 9. Slider; 10. Connecting post; 11. Positioning hole; 12. Positioning groove; 13. Fixed positioning head; 14. Moving positioning head; 15. Fastening screw; 16. Annular cavity; 17. Nut; 18. Threaded post; 19. Threaded sleeve; 20. Limiting groove; 21. Hexagonal groove; 22. Connecting rod. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments.

[0034] It should be noted that, unless otherwise defined, the technical or scientific terms used in this invention should have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0035] like Figures 1-7 As shown, a granulator sizing knife includes an outer cylinder 1 with one open end, multiple knife holders 3, and a first adjustment mechanism. The knife holders 3 are equidistantly arranged around the outer cylinder 1, and each knife holder 3 is fixed with a cutting blade 4. Both ends of one side of each knife holder 3 are hinged to a first connecting rod 7, and the other end of each first connecting rod 7 is hinged to the outer wall of the outer cylinder 1. The first adjustment mechanism is used to simultaneously adjust the expansion or contraction of the multiple knife holders 3. The first adjustment mechanism includes a threaded sleeve 19 threaded to one end of the outer cylinder 1. Multiple connecting posts 10 are installed around the threaded sleeve 19. Multiple sliders 9 are slidably arranged around the outer cylinder 1. The other ends of the multiple connecting posts 10 are respectively fixed to one side of the multiple sliders 9. Each slider 9 is hinged to a second connecting rod 8, and the other ends of the multiple second connecting rods 8 are respectively hinged to one side of the knife holder 3.

[0036] One end of the outer wall of the threaded sleeve 19 is fitted with an end ring 6, which is rotatably connected to the threaded sleeve 19. One end of each of the multiple connecting posts 10 is fixed to one side of the end ring 6.

[0037] The outer cylinder 1 has an annular cavity 16 around its interior. The sliders 9 are all slidably disposed in the annular cavity 16. The outer cylinder 1 has multiple strip grooves 5 around its outer wall that communicate with the annular cavity 16. One end of each slider 9 passes through the multiple strip grooves 5. The position of the connecting column 10 is adjusted by rotating the threaded sleeve 19. Then, the sliders 9 and the second connecting rod 8 drive the multiple tool holders 3 to unfold or retract, thereby precisely controlling the cutting angle.

[0038] The blade holder 3 has a mounting slot on one side, and the cutter 4 is inserted into the mounting slot. The cutter 4 has positioning holes 11 on both sides. A fixed positioning head 13 is provided at one end of the mounting slot, and a movable positioning head 14 is provided on the other side of the mounting slot. The fixed positioning head 13 and the movable positioning head 14 are used to position the two positioning holes 11 respectively. A fastening screw 15 is fixed at the other end of the movable positioning head 14, and the other end of the fastening screw 15 extends to the outside.

[0039] The bottom of the cutter 4 has a positioning groove 12, and a positioning protrusion is fixed on the bottom wall of the mounting groove. The positioning groove 12 is adapted to the positioning protrusion.

[0040] One end of the threaded sleeve 19 is fitted with a rubber sleeve, and the rubber sleeve has anti-slip texture.

[0041] It also includes an inner cylinder 2, which is slidably connected to the inside of the outer cylinder 1. A second adjustment mechanism is provided between the inner cylinder 2 and the outer cylinder 1. The outer cylinder 1 is mounted on the drive shaft of the drive system through the inner cylinder 2.

[0042] The second adjustment mechanism includes a threaded post 18 rotatably connected to one end of the inner cylinder 2. A nut 17 is threaded onto the threaded post 18. Multiple connecting rods 22 are fixed to the outer wall of the nut 17. The other end of each connecting rod 22 is fixed to the inner wall of the outer cylinder 1. The other end of the threaded post 18 extends into the threaded sleeve 19 and is coaxially arranged therewith. A hexagonal groove 21 is opened at one end of the threaded post 18. By using a tool to turn the threaded post 18 through the hexagonal groove 21, the relative position between the inner cylinder 2 and the outer cylinder 1 is changed, and the depth or position of the cutter 4 is adjusted.

[0043] The inner cylinder 2 has multiple limiting grooves 20 around its outer wall, and the outer cylinder 1 has multiple limiting protrusions around its inner wall. The multiple limiting grooves 20 are slidably connected to the multiple limiting protrusions to achieve the limiting effect on the inner cylinder 2 and prevent it from rotating with the threaded column 18.

[0044] A method for controlling the cutting of a pelletizing blade in a pellet mill, comprising the following steps:

[0045] During operation, the drive system will rotate the outer cylinder 1 by installing the inner cylinder 2, which will cause the knife holder 3 and the cutter 4 to rotate, and perform cutting and granulation operations.

[0046] If the cutting angle of the cutter 4 needs to be adjusted, it can be done through the first adjustment mechanism, that is, by rotating the threaded sleeve 19 to adjust the position of the connecting column 10, and then by adjusting the position of the tool holder 3 through the slider 9 and the second connecting rod 8, thereby achieving precise control of the cutting angle;

[0047] If the depth or position of the cutting blade needs to be adjusted, the positioning of the cutting blade 4 can be adjusted inside the tool holder 3, that is, by fixing the positioning head 13, moving the positioning head 14 and fastening the screw 15 to adjust the position of the cutting blade 4 in the mounting slot.

[0048] The position between the entire pellet mill cutter assembly and the drive shaft needs to be adjusted. This can be achieved by rotating the threaded post 18 of the second adjustment mechanism. This adjustment can affect the relative position between the inner cylinder 2 and the outer cylinder 1, thereby achieving the purpose of adjusting the position of the entire cutter assembly.

[0049] The cutting angle, cutting depth, and tool assembly position can all be precisely adjusted to meet different granulation requirements, achieving efficient and precise granulation operations.

[0050] Working principle: During normal use, the drive system rotates the inner cylinder 2 to rotate the outer cylinder 1, causing the cutter holder 3 and the cutter 4 to rotate for cutting and granulation. When it is necessary to adjust the cutting range of the cutter 4 and the gap between it and the screen, the position of the connecting column 10 can be adjusted by rotating the threaded sleeve 19. This, in turn, drives multiple cutter holders 3 to unfold or retract via the slider 9 and the second connecting rod 8, allowing for precise control of the cutting angle. Since the relative position of the entire device changes after the cutter holders 3 unfold or retract, adjustments are needed. The threaded column 18 can be turned with a tool to change the relative position between the inner cylinder 2 and the outer cylinder 1, adjusting the depth or position of the cutter 4. Alternatively, the fastening screw 15 can be loosened to separate the moving positioning head 14 from the cutter 4 for easy replacement.

[0051] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the invention is limited to these examples; within the framework of the invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity.

[0052] This invention is intended to cover all such substitutions, modifications, and variations falling within the broad scope of the claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A granulator finishing knife comprising an open-ended outer cylinder (1), a plurality of knife holders (3) and a first adjustment mechanism, characterized in that, The cutter seat (3) is equidistantly arranged around the outer cylinder (1), and each cutter seat (3) is fixed with a cutter (4); both ends of one side of the cutter seat (3) are hingedly connected with first connecting rods (7), and the other ends of the first connecting rods (7) are hingedly connected to the outer wall of the outer cylinder (1); the first adjusting mechanism is used for simultaneously adjusting the expansion or contraction of the plurality of cutter seats (3); the first adjusting mechanism comprises a threaded sleeve (19) which is screw-connected to one end of the outer cylinder (1); a plurality of connecting columns (10) are arranged on the threaded sleeve (19) along one circle thereof; a plurality of sliding blocks (9) are slidingly arranged on the outer cylinder (1) along one circle thereof; the other ends of the plurality of connecting columns (10) are respectively fixed to one side of the plurality of sliding blocks (9); second connecting rods (8) are hingedly connected to the sliding blocks (9); the other ends of the plurality of second connecting rods (8) are respectively hingedly connected to one side of the cutter seats (3). The installation inner cylinder (2) is slidingly connected to the inside of the outer cylinder (1); the second adjusting mechanism is arranged between the installation inner cylinder (2) and the outer cylinder (1); and the outer cylinder (1) is installed on the driving shaft of the driving system through the installation inner cylinder (2). The second adjusting mechanism comprises a threaded column (18) which is rotationally connected to one end of the installation inner cylinder (2); a nut (17) is screw-connected to the threaded column (18); a plurality of connecting rods (22) are fixed to the outer wall of the nut (17); the other ends of the connecting rods (22) are fixed to the inner wall of the outer cylinder (1); the other end of the threaded column (18) extends into the threaded sleeve (19) and is coaxially arranged with the threaded sleeve (19); and a hexagonal groove (21) is formed in one end of the threaded column (18). A plurality of limiting grooves (20) are formed in one circle of the outer wall of the installation inner cylinder (2); a plurality of limiting convex edges are arranged on one circle of the inner wall of the outer cylinder (1); and the plurality of limiting grooves (20) are respectively slidingly connected to the plurality of limiting convex edges.

2. A granulator sizing knife according to claim 1 wherein, An end ring (6) is sleeved on one end of the outer wall of the threaded sleeve (19); the end ring (6) is rotationally connected to the threaded sleeve (19); and the one ends of the plurality of connecting columns (10) are fixed to one side of the end ring (6).

3. A sizing knife for a granulator according to claim 2, wherein An annular cavity (16) is formed in one circle of the inside of the outer cylinder (1); the sliding blocks (9) are slidingly arranged in the annular cavity (16); a plurality of strip-shaped grooves (5) which are in communication with the annular cavity (16) are formed in one circle of the outer wall of the outer cylinder (1); and the one ends of the plurality of sliding blocks (9) respectively pass through the plurality of strip-shaped grooves (5).

4. A sizing knife for a granulator according to claim 1, wherein An installation slot is formed in one side of the cutter seat (3); the cutter (4) is inserted into the installation slot; positioning holes (11) are formed in both sides of the cutter (4); a fixed positioning head (13) is arranged in one end of the installation slot; a movable positioning head (14) is movably arranged in the other side of the installation slot; the fixed positioning head (13) and the movable positioning head (14) are respectively used for positioning the two positioning holes (11); the other end of the movable positioning head (14) is fixed with a fastening screw (15); and the other end of the fastening screw (15) extends to the outside.

5. A sizing knife for a granulator according to claim 4, wherein A positioning groove (12) is formed in the bottom of the cutter (4); a positioning convex is fixed to the bottom wall of the installation slot; and the positioning groove (12) is matched with the positioning convex.

6. A sizing knife for a granulator according to claim 1, wherein A rubber sleeve is sleeved on one end of the threaded sleeve (19); and anti-skid lines are formed on the rubber sleeve.

7. A method of cutting control of a granulator sizing knife according to any one of claims 1 to 6, wherein Comprising the following steps: Step one: during operation, the drive system will rotate the outer cylinder (1) through the installation of the inner cylinder (2), so that the tool holder (3) and the cutting knife (4) rotate, and the cutting granulation operation is carried out; Step two: if the cutting angle of the cutting knife (4) needs to be adjusted, the first adjusting mechanism can be used, that is, the position of the connecting column (10) is adjusted by rotating the threaded sleeve (19), and then the position of the tool holder (3) is adjusted through the slider (9) and the connecting rod (8), so as to realize accurate control of the cutting angle; Step three: if the depth or position of the cutting blade needs to be adjusted, the position of the cutting knife (4) in the installation slot can be adjusted inside the tool holder (3), that is, the position of the cutting knife (4) in the installation slot is adjusted by fixing the positioning head (13) and the moving positioning head (14) and the fastening screw (15); Step four: if the position between the entire granulator tool assembly and the drive shaft needs to be adjusted, the threaded column (18) of the second adjusting mechanism can be rotated to achieve this adjustment, which can affect the relative position between the installation inner cylinder (2) and the outer cylinder (1), so as to achieve the purpose of adjusting the position of the entire tool assembly; Step five: the cutting angle, cutting depth and tool assembly position can be accurately adjusted to meet different granulation requirements and realize efficient and accurate granulation operation.

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