CN109648910B - A material collecting groove device for improving powder ball pressing forming strength - Google Patents
A material collecting groove device for improving powder ball pressing forming strength Download PDFInfo
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- CN109648910B CN109648910B CN201910088140.1A CN201910088140A CN109648910B CN 109648910 B CN109648910 B CN 109648910B CN 201910088140 A CN201910088140 A CN 201910088140A CN 109648910 B CN109648910 B CN 109648910B
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- collecting groove
- material collecting
- powder
- roller
- hopper seat
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
- B30B11/16—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using pocketed rollers, e.g. two co-operating pocketed rollers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/30—Feeding material to presses
- B30B15/302—Feeding material in particulate or plastic state to moulding presses
- B30B15/308—Feeding material in particulate or plastic state to moulding presses in a continuous manner, e.g. for roller presses, screw extrusion presses
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Abstract
The invention belongs to the technical field of powder ball pressing, and discloses a material collecting groove device for improving powder ball pressing forming strength, which comprises a material collecting groove, a hopper seat, a prepressing screw for conveying powder, and two pressing rollers; the prepressing spiral is installed on the hopper seat, the material collecting groove is arranged at the bottom end of the hopper seat, a gradually converging conical channel is formed in an internal material channel of the material collecting groove, and the outer side of the lower end of the material collecting groove is attached to the roller surface of the compression roller; and the powder between the fixed compression roller and the movable compression roller is compressed into balls by providing constant pressing force for the movable compression roller. The application of the material collecting groove device can reduce the contact length and the contact area of the pre-compressed material and the roller surface of the compression roller, the average pressure of the contact area of the material and the roller surface is obviously improved under the condition of not increasing the thrust of the oil cylinder, and the molding strength of the finally pressed ball block is also obviously improved.
Description
Technical Field
The invention belongs to the technical field of powder ball pressing, and particularly relates to a material collecting groove device for improving powder ball pressing forming strength.
Background
The invention is conceived from the production process that coal powder and lime powder are pressed into balls or blocks through a ball press. Meanwhile, the method is also applied to the production process of pressing similar powder and granular materials into balls or other blocky materials through a ball press or a structure similar to the ball press.
The existing ball press machine presses balls by aiming at dry coal powder and lime powder under the condition without a binder according to the principle that: the mixed powder material after being pre-pressed and pressurized by adopting spiral feeding is conveyed between two oppositely-clamped compression rollers with ball sockets, two sides of each compression roller are provided with baffles to seal the pre-pressed powder material so as to maintain the pressure, and the two rollers with the ball sockets apply certain constant pressing force and rotate oppositely to bite the pre-pressed powder material. Forming the ball or the ball block after pressing by a pressing roller. The existing ball press needs to press ball blocks with qualified strength, large pressing force needs to be applied to a pressing roller device, the requirement on the rigidity of a frame is high, and the service life of a bearing of the pressing roller and the service life of the hardened pressing roller are damaged by the excessive pressing force. After the powder was filled to toper hopper, conical unloading screw mechanism was rotatory, and powdery material pressurized moves down along cylinder hopper seat to two compression roller junctions that dry powder ball press machine rotated in opposite directions, and surface machining has the ball socket, and the powder is pressed into oblate spheroid, and the compression roller rotates in succession, and the ball base is deviate from below.
As shown in fig. 1 and 6, a feeding system of a conventional ball press machine is composed of a hopper, a hopper seat, and a pre-pressing screw mechanism installed in the hopper seat. After the hopper is filled with powder, the pre-pressing screw mechanism rotates and conveys the powder, the powder is pressed and conveyed to two press roll surfaces of the ball press machine which rotate oppositely and are provided with ball sockets on the surfaces along an inner channel of the hopper seat, and the pre-pressed powder is bitten by the rotating press roll surfaces and is further pressurized by the rotating press roll surfaces. The press rolls rotate continuously, and the ball blocks fall off from the roll gaps of the two rolls. Because current ball press hopper seat is welded structure, hopper seat internal design have with the cylindrical passageway of pre-compaction spiral complex, because structural reason, hopper seat and both sides compression roller will be inevitable to form a great triangle-shaped cavity region. The material existing in the triangular cavity area has the following effects: because the material in the area is pre-compressed material and has certain strength, the positive pressure of the material in the area, which is in contact with the roller surface, and the thrust of the oil cylinder are approximately balanced and equal, under the condition that the thrust of the oil cylinder is not changed, the larger the projection area of the area in the vertical direction is, the smaller the average pressure which can be reached by the material is, and the smaller the pressure ball is, the smaller the strength of the formed ball block is, and the insufficient strength is caused; because the pre-compressed material has certain strength, the larger the contact area between the material and the roller surface is, the stronger the friction effect on the roller surface is, and the stronger the friction effect is, the lower the mechanical efficiency is.
Disclosure of Invention
In order to solve the above problems in the prior art, the present invention aims to provide a trough collecting device for improving the forming strength of powder material pressed balls, which can effectively improve the strength of pressed ball blocks without increasing the pressure of the ball press, or properly reduce the pressing force of the pressing roller and correspondingly reduce the power for driving the pressing roller when the ball forming strength is ensured to be inconvenient.
The technical scheme adopted by the invention is as follows:
a material collecting groove device for improving the powder material ball pressing forming strength comprises a material collecting groove, a hopper seat, a prepressing screw for conveying powder materials, and two pressing rollers which are driven by a speed reducer to rotate oppositely, wherein a plurality of arc ball sockets which are uniformly distributed are carved on the roller surfaces of the pressing rollers;
the prepressing spiral is installed on the hopper seat, the material collecting groove is arranged at the bottom end of the hopper seat, a gradually converging conical channel is formed in an internal material channel of the material collecting groove, the outer side of the lower end of the material collecting groove is attached to the roller surface of the compression roller, and the material collecting groove is located in a triangular area between the hopper seat and the two compression rollers;
one of the two press rolls is a fixed press roll, the other press roll is a movable press roll, and the pre-compressed materials between the fixed press roll and the movable press roll are pressed into balls by providing constant pressing force for the movable press roll;
the height of the material collecting groove is less than half of the distance between the hopper seat and the central connecting line of the two press rollers;
the height of the material collecting groove is larger than one third of the distance between the hopper seat and the central connecting line of the two pressing rollers.
Furthermore, the included angle between the inclined edge of the axial section of the material collecting groove and the bottom end face of the hopper seat is 40-50 degrees.
Furthermore, the inclined edge of the shaft section of the material collecting groove and the bottom end face of the hopper seat form an included angle of 45 degrees.
Furthermore, a constant pressing force is provided for the movable pressing roller through an oil cylinder group, a limiting block is arranged between a bearing seat of the movable pressing roller and a bearing seat of the fixed pressing roller, and the oil cylinder group pushes the movable pressing roller to move towards the limiting block.
Further, the collecting groove is detachably arranged at the bottom end of the hopper seat.
The invention has the beneficial effects that:
(1) the application of the material collecting groove device of the invention can reduce the contact height and the contact area of the pre-compressed material and the roller surface of the compression roller, under the condition of unchanging thrust of the oil cylinder, the average pressure of the material and the roller surface contact area is obviously improved, the forming strength of the finally pressed ball block is also obviously improved, the material collecting groove device of the invention can reduce the contact area of the pre-compressed material and the roller surface of the compression roller, thereby reducing the friction effect of the material and the roller surface, slightly reducing the torque for driving the compression roller to work, and the tapered channel gradually converging in the material collecting groove can reduce the abrupt change of the section of the pre-compressed material channel, and is beneficial to the maintenance of the intensity of the pre-compressed material and the improvement of the intensity of the final ball block.
(2) The material that gathers materials groove and precompression has obvious friction, designs for detachable construction, changes after the wearing and tearing of being convenient for.
Drawings
Fig. 1 is a basic configuration diagram of a conventional ball press machine.
Fig. 2 is a schematic structural diagram of the present invention.
Fig. 3 is an enlarged view at I of fig. 2.
Fig. 4 is a partially enlarged schematic view of fig. 2.
Fig. 5 is a plan view of the cylinder of the present invention.
Fig. 6 is a plan view of the cylinder of fig. 1.
In the figure: 1-a material collecting groove; 2-prepressing the spiral; 3-pressing roller; 301-side baffle; 302-the outer circle of the press roll; 303-fixing a bearing seat of the compression roller; 304-a bearing seat of the movable press roll; 4-hopper seat; 5-a tapered channel; 6-oil cylinder; 7-a limiting block; 8-triangular cavity.
Detailed Description
The invention is further explained below with reference to the drawings and the specific embodiments.
Example 1:
the basic structure of the existing ball press is shown in fig. 1, the existing ball press is composed of a pre-pressing screw for conveying powder materials, the pre-pressing screw is installed in a hopper seat, two pressing rollers driven by a double output shaft of a speed reducer and a coupling rotate oppositely, one of the two pressing rollers is a fixed pressing roller, the other pressing roller is a movable pressing roller, the existing ball press also comprises an oil cylinder group acting on the movable pressing roller to provide constant pressing force, the pre-pressed materials between the fixed pressing roller and the movable pressing roller are pressed into balls by providing constant pressing force for the movable pressing roller, when a hopper at the upper part of the pre-pressing screw is filled with powder, the pre-pressing screw rotates to convey the powder to a position between two pressing roller gaps of the ball press, which rotate oppositely and are provided with ball sockets on the surfaces, and the pre-pressed materials are bitten by the.
This embodiment provides a material collecting groove device for improving powder ball-pressing shaping intensity as shown in fig. 2 and 4, including material collecting groove 1 and the pre-compaction spiral 2 of carrying the powder, still include through the speed reducer drive and two compression rollers 3 of pivoted in opposite directions, be carved with a plurality of arc ball sockets of evenly arranging on the roll surface of compression roller, the powder of being convenient for being bitten is pressed into the ball piece.
The pre-compression spiral mounting is on hopper seat 4, the groove that gathers materials sets up the bottom of hopper seat, the inside material passageway of groove that gathers materials forms the toper passageway 5 of gradually converging, and the tapering of the inside material passageway design of groove that gathers materials to become gradually converging is favorable to reducing the contact height and the area of contact of pre-compression material and compression roller roll surface.
After increasing the groove device that gathers materials, material and compression roller after the precompression will obviously reduce one section length with compression roller roll surface contact in vertical direction, gather materials groove owing to bear the extrusion and the friction of material, adopt wear-resistant material sclerosis to handle, the setting of groove detachably that gathers materials is in the bottom of hopper seat designs into removable structure, the dismantlement and the change in the groove of gathering materials of being convenient for. The material channel in the material collecting groove is designed into a gradually converging conical channel; the terminal surface area of hopper seat exit end is better slightly to be greater than the terminal surface area of toper passageway entry end, the terminal surface of collecting groove entry end should be able to cover hopper seat export passageway cross-section avoids the cross-section sudden change to cause the material decompression after the pre-compaction.
The collecting groove is positioned in a triangular area between the hopper seat and the two compression rollers, two side baffles 301 are respectively arranged on two sides of the collecting groove, the two compression rollers and the two side baffles jointly enclose to form a triangular cavity 8 for sealing materials, the lower end of the collecting groove slightly converges towards the inner side of the collecting groove and is basically close to the roller surface, the outer side of the lower end of the collecting groove is in fit contact with an excircle 302 of the compression roller, and a narrow gap with proper length (the gap belongs to tolerance control property) is reserved between the outer side of the lower end of the collecting groove and the excircle of the compression roller to ensure the sealing effect of the compressed materials (as shown in figure 3); the two side baffles, the two compression rollers and the collecting tank are used for sealing the compressed materials between the two compression rollers together. The inner sides of the outlet ends of the internal channels of the material collecting grooves are trimmed and kept symmetrical, so that the materials can be conveyed to the surface of the compression roller uniformly.
The application of the collecting groove of the device of the invention can lead the material outlet of the pre-compressed material to descend for a certain height (the descending height of the material outlet of the powder is A, and the contact length of the material of the prior ball press machine shown in figure 1 in the vertical direction is H), thereby leading the projection area of the compressed material and the roller surface of the compression roller in the vertical direction to be obviously reduced, leading the contact area of the material and the roller surface of the compression roller to be obviously improved after the contact area of the material and the roller surface of the compression roller is reduced under the condition of unchanged thrust action of the oil cylinder, leading the average pressure of the residual contact area of the material and the roller surface to be obviously improved after the contact area of the material and the roller surface is reduced, further ensuring that the molding strength of the finally pressed ball block is also obviously improved, and because the separation action of the collecting groove reduces the contact length of the material and the roller surface of the compression roller.
The inclined edge of the shaft section of the collecting groove and the included angle of the bottom end face of the hopper seat are 40-50 degrees and designed into a certain convergence taper, the inclined edge of the shaft section of the collecting groove and the included angle of the bottom end face of the hopper seat are preferably 45 degrees, sudden change of the material section after pre-compression is avoided alternatively, the forming strength of the pressed ball block is good, and the pressed ball block is better in circularity.
The height of the material collecting groove is less than half of the distance between the hopper seat and the central connecting line of the two compression rollers, so that the discharge hole of the powder material is lowered by a certain height, the contact length of the material and the roller surface of the compression rollers can be effectively reduced, the average pressure of the contact area of the material and the roller surface is obviously improved, and the molding strength of the finally pressed ball block is also obviously improved.
The height of the material collecting groove is larger than one third of the distance between the hopper seat and the central connecting line of the two press rollers, and a certain convergent taper can be kept.
As shown in fig. 5, a constant pressing force is provided to the movable pressing roller through an oil cylinder group, a limit block is arranged between a bearing seat 304 of the movable pressing roller and a bearing seat 303 of the fixed pressing roller, the limit block is installed on the bearing seat of the fixed pressing roller, and the oil cylinder group pushes the movable pressing roller to displace towards the limit block. The oil cylinder group comprises two oil cylinders 6, correspondingly, the limiting blocks 7 are also two (the thickness of the limiting blocks can be adjusted so as to adjust the gap between the fixed compression roller and the movable compression roller as required), and the two oil cylinders are arranged on two sides of the movable compression roller. The distance between the movable compression roller and the fixed compression roller is adjusted by pushing the movable compression roller through the oil cylinder, so that the powder pressing force between the fixed compression roller and the movable compression roller is adjusted.
The material collecting groove device has the advantages that the strength of pressed ball blocks can be obviously improved under the condition of not increasing the thrust of an oil cylinder, and the torque for driving a compression roller to work is slightly reduced; or under the condition of ensuring that the strength of the pressed ball meets the requirement, the compression roller force of the oil cylinder is reduced, the reduction of the compression roller force reduces the load of the main drive, the existing rack has larger rigidity reserve after the compression roller force is reduced, the cross section size of the rack can be reduced under the condition of ensuring safety and reliability, the steel consumption of the rack is reduced, the lower compression roller force of the oil cylinder also prolongs the effective service life of the bearing, the service life of a working surface of the compression roller and the like, and the comprehensive benefit is obvious.
The present invention is not limited to the above-described alternative embodiments, and various other forms of products can be obtained by anyone in light of the present invention. The above detailed description should not be taken as limiting the scope of the invention, which is defined in the claims, and which the description is intended to be interpreted accordingly.
Claims (5)
1. The utility model provides a material collecting groove device for improving powder ball pressing forming strength which characterized in that: the device comprises a material collecting groove, a hopper seat, a prepressing screw for conveying powder, and two press rolls which are driven by a speed reducer to rotate in opposite directions, wherein a plurality of arc ball sockets which are uniformly distributed are carved on the roll surfaces of the press rolls;
the prepressing spiral is installed on the hopper seat, the material collecting groove is arranged at the bottom end of the hopper seat, a gradually converging conical channel is formed in an internal material channel of the material collecting groove, the outer side of the lower end of the material collecting groove is attached to the roller surface of the compression roller, and the material collecting groove is located in a triangular area between the hopper seat and the two compression rollers;
one of the two press rolls is a fixed press roll, the other press roll is a movable press roll, and the pre-compressed materials between the fixed press roll and the movable press roll are pressed into balls by providing constant pressing force for the movable press roll;
the height of the material collecting groove is less than half of the distance between the hopper seat and the central connecting line of the two press rollers;
the height of the material collecting groove is larger than one third of the distance between the hopper seat and the central connecting line of the two pressing rollers.
2. The trough device that collects for improving the forming strength of powder material pressed balls according to claim 1, wherein: the included angle between the bevel edge of the axial section of the material collecting groove and the bottom end face of the hopper seat is 40-50 degrees.
3. The trough device that collects for improving the forming strength of powder material pressed balls according to claim 2, wherein: the inclined edge of the shaft section of the material collecting groove and the bottom end face of the hopper seat form an included angle of 45 degrees.
4. The trough device that collects for improving the forming strength of powder material pressed balls according to claim 3, wherein: the constant pressing force is provided for the movable pressing roller through the oil cylinder group, a limiting block is arranged between a bearing seat of the movable pressing roller and a bearing seat of the fixed pressing roller, and the oil cylinder group pushes the movable pressing roller to move towards the limiting block.
5. The trough device for collecting powder used for improving the forming strength of powder material pressed balls according to any one of claims 1 to 4, wherein: the collecting groove is detachably arranged at the bottom end of the hopper seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910088140.1A CN109648910B (en) | 2019-01-29 | 2019-01-29 | A material collecting groove device for improving powder ball pressing forming strength |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910088140.1A CN109648910B (en) | 2019-01-29 | 2019-01-29 | A material collecting groove device for improving powder ball pressing forming strength |
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| Publication Number | Publication Date |
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| CN109648910A CN109648910A (en) | 2019-04-19 |
| CN109648910B true CN109648910B (en) | 2021-01-05 |
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| CN201910088140.1A Active CN109648910B (en) | 2019-01-29 | 2019-01-29 | A material collecting groove device for improving powder ball pressing forming strength |
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| CN117601492B (en) * | 2023-12-05 | 2024-04-30 | 山东东源新材料科技有限公司 | Desulfurization and denitrification catalyst shaping equipment and shaping method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE2523004A1 (en) * | 1974-05-23 | 1975-12-04 | Uss Eng & Consult | Briquette mfr. from hot reduced iron ore - using briquetting rolls under conditions which prevent briquettes sticking to rolls |
| GB1544534A (en) * | 1976-07-16 | 1979-04-19 | British Steel Corp | Production of metal strip or sheet |
| DE3509616C2 (en) * | 1985-02-27 | 1987-04-30 | Korf Engineering GmbH, 4000 Düsseldorf | Method for compacting iron particles and subsequent breaking apart of the compacted iron strip and device for carrying out this method |
| JPH0638639Y2 (en) * | 1990-08-20 | 1994-10-12 | 川崎重工業株式会社 | Roll compressor sealing device |
| CN201745206U (en) * | 2010-08-19 | 2011-02-16 | 刘家泽 | Material guide device for high-strength dry powder ball press |
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