Flat-die granulator

Abstract

The utility model discloses a flat die granulator which comprises a machine body and a vertical main shaft arranged on the machine body, a flat die is arranged at the upper end of the main shaft and is fixed by a nut and a key, a conical press roll is arranged on the upper edge of the flat die, a press roll shaft is jacked by a jackscrew on the machine body, an anti-sliding groove is arranged outside the conical press roll, and the large end of the anti-sliding groove is closed. A stock bin is arranged above the machine body and the flat die, and a jackscrew is arranged outside the stock bin and abuts against the upper face of the outer end of the pressing roller shaft. The lower end of the vertical main shaft installed on the machine body is provided with a speed reducing mechanism connected with a motor. Compared with a cylindrical compression roller, the flat-die granulator adopts the conical compression roller, so that the relative speed of the compression roller and the flat die is reduced, the extrusion force applied to materials is larger, the yield and the quality of granules are improved, and the jackscrew on the granulator body limits the gap between the conical compression roller shaft frame and the flat die, so that the production efficiency is improved. Therefore, the gap between the compression roller and the flat die can be adjusted without depending on experience and feeling after the machine is started, and the adjusting screw on the stock bin can be directly screwed down.

Description

Technical Field

[0001] The utility model relates to the technical field of particle manufacturing machinery, in particular to a flat die granulator. Background Art

[0002] Flat die pellet mill is a commonly used pellet making machine, which is often used to make powdered or small granular feed and other materials into cylindrical pellets.

[0003] The current flat die granulator uses a cylindrical roller to rotate and roll on a circular flat die with through holes, thereby squeezing powdery or small granular raw materials through the through holes to form cylindrical granules.

[0004] Since the gap between the roller and the flat die is adjusted based on feeling and experience, the output and life of the flat die pelletizer cannot reach the expected value. Since the linear speed of the cylindrical roller and the flat die is too different, the hardness of the material particles and the life of the roller and the flat die are affected. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a flat die pelletizer, which is used to solve the problem that the gap between the pressing roller and the flat die of the current flat die pelletizer is adjusted by experience and feeling, thereby affecting the service life of the flat die and the pressing roller and the particle output of the flat die pelletizer.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0007] A flat die pelletizing machine comprises a base, a gearbox fixedly connected to the base from bottom to top, a fuselage and a silo, wherein a flat die is arranged near the top in the fuselage, through holes are distributed on the flat die, a pressure roller shaft is arranged above the flat die, a pressure roller is rotatably connected to the pressure roller shaft, a fuselage discharge port is arranged on the outside of the fuselage, and the fuselage discharge port is lower than the flat die, a motor connected to the flat die through a gearbox is arranged on the base, a hollow regulating chamber protruding outward is arranged at a position corresponding to the outer end of the pressure roller shaft, a vertical notch is arranged on the outer wall of the regulating chamber, a pressure roller shaft head is fixedly connected to the outer end of the pressure roller shaft, and the pressure roller shaft head is slidably arranged in the notch; a pressure roller limiting screw is arranged on the fuselage, the upper end of the pressure roller limiting screw abuts against the bottom of the pressure roller shaft head, and the pressure roller limiting screw is turned to adjust the gap between the pressure roller and the flat die; a pressure roller adjusting screw is threadedly connected to the upper part of the regulating chamber.

[0008] Furthermore, a pressure roller limiting screw is provided on the machine body, and the upper end of the pressure roller limiting screw is against the bottom of the pressure roller shaft head.

[0009] Furthermore, the pressing roller is in the shape of a truncated cone with a smaller diameter inside and a larger diameter outside, and the inner end of the pressing roller shaft is tilted downward.

[0010] Furthermore, the radius of the inner end of the pressure roller is r, the radius of the outer end of the pressure roller is R, the distance between the lowest point of the inner end of the pressure roller and the axis of the flat die is d, and the distance between the lowest point of the outer end of the pressure roller and the axis of the flat die is D, then: R / r=D / d.

[0011] Furthermore, the outer circumference of the pressure roller is provided with an anti-skid groove, and the anti-skid groove is arranged along the generatrix of the pressure roller.

[0012] Furthermore, the outer end of the anti-slip groove is blocked.

[0013] Furthermore, the number of the pressing rollers is at least two and they are evenly distributed along the circumferential direction with the axis of the flat die as the center. The number of the pressing roller shafts is consistent with the number of the pressing rollers, and the inner ends of the pressing roller shafts are fixedly connected to each other.

[0014] The positive effects of the utility model are:

[0015] The utility model is provided with a truncated cone-shaped pressing roller, which ensures that when the pressing roller rolls on the flat die, the relative speed between the pressing roller and the flat die is reduced, which can greatly reduce the wear of the pressing roller and increase the pressure of the flat die and the pressing roller on the material. The gap between the pressing roller and the flat die can be adjusted by the pressing roller adjusting screw and the pressing roller limiting screw, so as to limit the gap between the pressing roller and the flat die, thereby ensuring the output and quality of the granulator and reducing unnecessary wear of the flat die and the pressing roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is the front view of the utility model;

[0017] Figure 2 yes Figure 1 A top view of

[0018] Figure 3 yes Figure 2 Cross-sectional view of the middle AA part;

[0019] Figure 4 yes Figure 2 Enlarged view of the left part;

[0020] In the figure:

[0021] 1. Gearbox; 2. Discharge port of machine body; 3. Material bin; 4. Pressure roller adjustment screw; 5. Pressure roller limit screw; 6. Motor; 7. Base; 8. Adjustment chamber; 9. Pressure roller shaft; 10. Pressure roller; 11. Anti-skid groove; 12. Through hole; 13. Flat die; 14. Main shaft; 15. Notch; 16. Pressure roller shaft head; 17. Machine body. DETAILED DESCRIPTION

[0022] Example 1

[0023] like Figures 1 to 4As shown, a flat die pelletizing machine comprises a rectangular base 7, a gearbox 1 fixedly connected to the top surface of the left portion of the base 7 from bottom to top, a body 17 and a silo 3, a flat die 13 is arranged near the top inside the body 17, through holes are distributed on the flat die 13, a pressure roller shaft 9 is arranged above the flat die 13, a pressure roller 10 is rotatably connected to the pressure roller shaft 9, a body discharge port 2 is arranged on the outside of the body 17, and the body discharge port 2 is lower than the flat die 13, and a motor 6 is provided on the base 7 that is transmission-connected to the flat die 13 through the gearbox 1.

[0024] The pressure rollers 10 are three evenly distributed along the circumferential direction with the axis of the flat die 13 as the center, the number of the pressure roller shafts 9 is three, and the pressure roller shafts 9 correspond to the pressure rollers 10 one by one. The inner ends of the pressure roller shafts 9 are fixedly connected to each other to form a herringbone shape.

[0025] The silo 3 has a hollow adjustment chamber 8 protruding outward at a position corresponding to the outer end of each roller shaft 9, and a vertical notch 15 is provided on the outer wall of each adjustment chamber 8. A roller shaft head 16 is fixedly connected to the outer end of the roller shaft 9, and the upper and lower surfaces of the roller shaft head 16 are both flat, and the outer end of the roller shaft head 16 is slidably arranged in the corresponding notch 15. A vertical roller adjustment screw 4 is threadedly connected to the upper part of the adjustment chamber 8, and the lower end of the roller adjustment screw 4 is close to the upper side of the corresponding roller shaft head 16.

[0026] A vertical roller limit screw 5 is threadedly connected through the lower part of the adjustment chamber 8, and the upper end of the roller limit screw 5 abuts against the bottom of the roller shaft head 16. Nuts are screwed on the roller adjustment screw 4 and the roller limit screw 5 to lock the vertical positions of the roller adjustment screw 4 and the roller limit screw 5 and prevent the roller adjustment screw 4 and the roller limit screw 5 from loosening.

[0027] The working process of the utility model is:

[0028] The raw materials are put into the silo 3 from the top, and the motor 6 drives the flat die 13 to rotate. The raw materials are squeezed between the pressing roller 10 and the flat die 13, and fall down through the through hole 12 to form columnar particles, and then discharged through the discharge port 2 of the machine body.

[0029] By turning the roller adjustment screw 4 and the roller limit screw 5, the height of the roller shaft head 16 can be adjusted, and then the height of the roller shaft 9 and the height of the three rollers 10 can be adjusted, so as to adjust the gap between the three rollers 10 and the flat die 13.

[0030] Example 2

[0031] The difference between this embodiment and embodiment 1 is that:

[0032] The pressure roller 10 is a truncated cone with a smaller diameter inside and a larger diameter outside, and the inner end of the pressure roller shaft 9 is tilted downward. The radius of the inner end of the pressure roller 10 is r, the radius of the outer end of the pressure roller 10 is R, the distance between the lowest point of the inner end of the pressure roller 10 and the axis of the flat die 13 is d, and the distance between the lowest point of the outer end of the pressure roller 10 and the axis of the flat die 13 is D, then: R / r=D / d.

[0033] Since R / r=D / d, it is ensured that when the pressure roller 10 rolls along the flat die 13, the arc length of each circle on the side of the pressure roller 10 that is coaxial with the end face and rolls on the flat die 13 is equal to the arc length of the circle's rotation, that is, when the pressure roller 10 rolls on the flat die 13, the relative sliding between the pressure roller 10 and the flat die 13 is relatively small, which can greatly reduce the wear of the pressure roller 10 and increase the pressure of the flat die and the pressure roller on the material.

[0034] Example 3

[0035] The difference between this embodiment and embodiment 2 is that:

[0036] The outer circumference of the pressure roller 10 is provided with an anti-skid groove 11 , which is arranged along the generatrix of the pressure roller 10 , and the outer end of the anti-skid groove 11 is blocked.

[0037] The anti-skid groove 11 is provided and the outer end of the anti-skid groove 11 is blocked, so as to prevent the raw materials from flowing to the outside of the pressing roller 10 and gathering at the bottom of the inner wall of the silo 3, thereby reducing the utilization rate of the raw materials.

[0038] The above-mentioned embodiments are described in detail and specifically, and express the preferred embodiments of the utility model. They are only used to illustrate the technical ideas and features of the utility model. The purpose is to enable technicians in this field to understand the content of the utility model and implement it accordingly, but they are not limited to the utility model. The patent scope of the utility model cannot be limited only by this embodiment. That is, all equivalent changes or modifications made to the spirit disclosed by the utility model, for researchers or technicians in this field, within the structure of the utility model, the local improvements within the system and the changes and transformations between subsystems are still within the patent scope of the utility model. At present, the technical solution of this application has been pilot-tested, that is, a small-scale experiment of the product before large-scale mass production; after the pilot test, a user survey was conducted in a small range, and the survey results showed that the user satisfaction was high; now we are preparing for the formal production of the product for industrialization, including intellectual property risk warning surveys.

Claims

1. A flat die pelletizer, characterized in that: The invention comprises a base (7), a gearbox (1) fixedly connected to the base (7) in order from bottom to top, a body (17) and a silo (3), wherein a flat die (13) is provided in the body (17) near the top, through holes are distributed on the flat die (13), a pressure roller shaft (9) is provided above the flat die (13), a pressure roller (10) is rotatably connected to the pressure roller shaft (9), a body discharge port (2) is provided on the outside of the body (17), and the body discharge port (2) is lower than the flat die (13), a motor (6) is provided on the base (7) and is transmission-connected to the flat die (13) through the gearbox (1), and the silo (3) is connected to the pressure roller shaft (9) by the gearbox (1). The position corresponding to the outer end of the roller shaft (9) is a hollow adjustment chamber (8) protruding outward, and a vertical notch (15) is provided on the outer wall of the adjustment chamber (8). The outer end of the pressure roller shaft (9) is fixedly connected to a pressure roller shaft head (16), and the pressure roller shaft head (16) is slidably arranged in the notch (15); a pressure roller limiting screw (5) is provided on the machine body (17), and the upper end of the pressure roller limiting screw (5) is against the bottom of the pressure roller shaft head (16). The pressure roller limiting screw (5) is turned to adjust the gap between the pressure roller (10) and the flat die (13); the upper part of the adjustment chamber (8) is threadedly connected to a pressure roller adjustment screw (4).

2. A flat die pelletizer according to claim 1, characterized in that: The pressing roller (10) is in the shape of a truncated cone with a smaller diameter inside and a larger diameter outside, and the inner end of the pressing roller shaft (9) is tilted downward.

3. A flat die pelletizer according to claim 2, characterized in that: The radius of the inner end of the pressing roller (10) is r, the radius of the outer end of the pressing roller (10) is R, the distance between the lowest point of the inner end of the pressing roller (10) and the axis of the flat die (13) is d, and the distance between the lowest point of the outer end of the pressing roller (10) and the axis of the flat die (13) is D, then: R / r=D / d.

4. A flat die pelletizer according to claim 1, characterized in that: The outer circumference of the pressure roller (10) is provided with an anti-skid groove (11), and the anti-skid groove (11) is arranged along the generatrix of the pressure roller (10).

5. A flat die pelletizer according to claim 4, characterized in that: The outer end of the anti-slip groove (11) is blocked.

6. A flat die pelletizer according to claim 1, characterized in that: The pressing rollers (10) are at least two uniformly distributed in the circumferential direction with the axis of the flat die (13) as the center, the number of the pressing roller shafts (9) is consistent with the number of the pressing rollers (10), and the inner ends of the pressing roller shafts (9) are fixedly connected to each other.

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