CN112958767A - Cavity-adjustable metal powder injection molding system and injection method thereof - Google Patents
Cavity-adjustable metal powder injection molding system and injection method thereof Download PDFInfo
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- CN112958767A CN112958767A CN202110272760.8A CN202110272760A CN112958767A CN 112958767 A CN112958767 A CN 112958767A CN 202110272760 A CN202110272760 A CN 202110272760A CN 112958767 A CN112958767 A CN 112958767A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/22—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip
- B22F3/225—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip by injection molding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/005—Transportable screening plants
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/003—Apparatus, e.g. furnaces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/004—Filling molds with powder
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/20—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by extruding
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- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
Abstract
The invention relates to the technical field of metallurgical equipment and discloses a cavity-adjustable metal powder injection molding system and an injection method thereof. When a sieve section of thick bamboo is rotatory, the guide vane through its inner wall makes metal powder continuously move right on the one hand, on the other hand filters finer metal powder through smart mouthful, finer metal powder falls via smart mouthful, get into the feed cylinder, thicker metal powder that can't be strained by smart mouthful then is guided by the guide vane and continuously moves right, discharge from the coarse filtration mouth of a sieve section of thick bamboo right-hand member finally, fall into the feed bin, therefore, can accomplish the separation of thickness metal powder, only remain finer metal powder, promote the quality of metallurgical product.
Description
Technical Field
The invention relates to the technical field of metallurgical equipment, in particular to a cavity-adjustable metal powder injection molding system and an injection method thereof.
Background
Powder metal forming is one of the basic processes in powder metal production, with the aim of forming loose metal powder into semi-finished or finished products of predetermined geometry, size, density and strength. Compression molding is the most widely used molding method in metal powder metallurgy production, but in practical application, we find that the traditional metal powder injection molding device still has some defects, for example, the traditional metal powder injection molding device has low automation degree, needs a plurality of devices to be used in cooperation during molding, and has high cost, and the traditional metal powder injection molding device has a single extrusion chamber, only can extrude metal powder into a semi-finished product with a fixed shape, and is not convenient for adjusting the molding shape of the metal powder.
Meanwhile, in the powder metallurgy production, the particle size of the metal powder is generally required to be between 0.5 and 20 microns, because theoretically, the finer the particle, the larger the specific surface area is, and the stronger the surface effects, such as surface activity, surface adsorption capacity, catalytic capacity and the like, are, the easier the molding and sintering are. However, in the conventional metal powder injection molding apparatus, it is not convenient to screen out large particles of metal powder, which results in poor quality of metallurgical products.
Based on this, we propose a cavity adjustable metal powder injection molding system and an injection method thereof, which hopefully solve the disadvantages in the prior art.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides the cavity-adjustable metal powder injection molding system and the injection method thereof, and the cavity-adjustable metal powder injection molding system has the advantages of high automation degree, capability of screening out large-particle metal powder and convenience in adjusting the molding shape of the metal powder.
(II) technical scheme
In order to realize the purposes of high automation degree, capability of screening out large-particle metal powder and convenience for adjusting the forming shape of the metal powder, the invention provides the following technical scheme: a cavity-adjustable metal powder injection molding system comprises a feeding cylinder, wherein a connecting frame is fixedly installed on the outer wall of the feeding cylinder, a first motor is fixedly installed on the outer wall of the connecting frame, a connecting shaft is fixedly connected to the top of an output shaft of the first motor, a conveying auger is fixedly installed at the tail end of the connecting shaft, and the conveying auger is movably arranged inside the feeding cylinder;
the top of the feeding barrel is fixedly provided with a feeding barrel, the top of the feeding barrel is fixedly provided with a feeding hopper, the outer wall of the feeding hopper is fixedly provided with a feeding pipe, and a screening device is connected between the feeding pipe and a connecting shaft and can screen metal powder added from the feeding pipe to remove large-particle metal powder;
a bottom box is fixedly installed at the left end of the bottom of the feeding cylinder, a material receiving groove is formed in the bottom box, and a feed opening communicated with the material receiving groove is formed in the outer wall of the feeding cylinder;
the bottom box is also internally provided with a plurality of extrusion cavities, and the plugging device is movably arranged in the material receiving groove and is used for plugging the extrusion cavities or opening the extrusion cavities and guiding metal powder into the extrusion cavities or opening the extrusion cavities;
the extrusion rods are inserted into the extrusion cavities, the third motor is fixedly mounted at the top of the bottom box, and the control device connected between the third motor and the extrusion rods is used for driving the extrusion rods to move back and forth in the extrusion cavities so as to extrude the metal powder to be molded or open the extrusion cavities to discharge the molded metal powder;
as a preferred technical scheme of the invention, the screening device comprises a fixed bearing, a screen cylinder, a fine filtering port and a rough filtering port, the fixed bearing is fixedly installed on the inner top wall of the feeding hopper, the screen cylinder is fixedly installed on the inner wall of the fixed bearing, and a guide vane is arranged on the inner wall of the screen cylinder and used for guiding metal powder to roll to the right side;
the bottom of filling tube extends to the inside of a sieve section of thick bamboo and with sieve a section of thick bamboo by the left end of a sieve section of thick bamboo and do not connect with, the right-hand member fixed mounting of a sieve section of thick bamboo has the cross axle, the outer wall fixed mounting of cross axle has from the driving wheel, the outer wall fixed mounting of connecting axle has the action wheel, the action wheel is connected through the hold-in range with from between the driving wheel.
As a preferred technical scheme of the invention, the outer wall of the screen cylinder, which is positioned inside the feeding hopper, is provided with a fine filtering opening, and the opening position of the fine filtering opening corresponds to the top position of the feeding cylinder;
the outer wall of sieve section of thick bamboo right-hand member has seted up the coarse filtration mouth, the outer wall fixed mounting who goes into the hopper has material receiving box, material receiving box's inside is formed with the feed bin, the feed bin is on same vertical line with the coarse filtration mouth.
As a preferred technical scheme of the invention, the inner top wall of the feeding hopper is also fixedly provided with a cleaning brush, and the cleaning brush is used for cleaning metal powder on the inner wall of the fine filtering opening to prevent the metal powder from blocking the fine filtering opening.
As a preferred technical scheme of the invention, the plugging device comprises a plugging block, a threaded rod, a nut and a second motor, wherein the plugging block is movably arranged on the inner wall of the material receiving groove, a slope inclining to the left side is formed at the top of the plugging block, the threaded rod is rotatably connected to the bottom of the plugging block, the bottom end of the threaded rod extends to the outside of the bottom box and is fixedly connected with a bottom plate, a limiting rod is inserted into the bottom plate, and the limiting rod is fixedly arranged at the bottom of the bottom box;
the outer wall threaded connection of threaded rod has the nut, the nut rotates the bottom that sets up at the under casing, the outer wall fixed mounting of nut has outer ring gear, the outer wall meshing of outer ring gear has the gear, gear fixed mounting is at the output shaft top of second motor, second motor fixed mounting is on the outer wall of under casing.
As a preferred technical scheme of the invention, the control device comprises a screw rod, a nut and a vertical rod, the screw rod is fixedly installed at the top of an output shaft of the third motor, the nut is in threaded connection with the outer wall of the screw rod, the vertical rod is fixedly installed on the outer wall of the nut, and the tail end of the extrusion rod is fixedly installed on the outer wall of the vertical rod;
the bottom of the vertical rod is also fixedly provided with a guide sleeve, a guide rod is inserted into the guide sleeve, and the guide rod is fixedly arranged on the outer wall of the bottom box;
the tail ends of the screw rod and the guide rod are fixedly provided with baffle plates for preventing the guide sleeve from falling off the guide rod or preventing the screw nut from separating from the screw rod.
As a preferable technical solution of the present invention, the extrusion chamber includes a first extrusion groove, a second extrusion groove, and a third extrusion groove having a predetermined shape and diameter, the extrusion rod includes a first pressure rod, a second pressure rod, and a third pressure rod, and the shape and diameter of the first pressure rod, the second pressure rod, and the third pressure rod are respectively coupled with the shape and diameter of the inner wall of the first extrusion groove, the second extrusion groove, and the third extrusion groove.
As a preferable technical scheme of the invention, the threaded rod and the blocking block are internally provided with a material pushing device, and when the blocking block blocks the extrusion cavity, the material pushing device is used for ejecting gas to push extruded metal powder out of the extrusion cavity.
As a preferred technical scheme of the invention, the material pushing device comprises a gas pipe, a transverse groove, a movable rod and a sealing plate, wherein the transverse groove is formed inside the blocking block, the gas pipe communicated with the transverse groove is formed inside the threaded rod, the tail end of the gas pipe is fixedly connected with a gas inlet pipe, and the tail end of the gas inlet pipe is fixedly connected with a gas generating device;
a fixed plate is fixedly arranged on the inner wall of the transverse groove, a movable rod is inserted into the fixed plate, a tail plate is fixedly arranged at the right end of the movable rod, and a spring is fixedly connected between the tail plate and the fixed plate;
the left end of the movable rod is fixedly provided with a sealing plate, the outer wall of the right side of the sealing plate is in a circular truncated cone shape, and the left end of the transverse groove is provided with a sealing groove coupled with the outer wall of the sealing plate.
An injection method of a cavity-adjustable metal powder injection molding system is used for the cavity-adjustable metal powder injection molding system and comprises the following steps:
s01: starting a first motor to enable a connecting shaft at the top of an output shaft of the first motor to rotate, wherein the rotation of the connecting shaft drives a conveying auger at the tail end of the connecting shaft to rotate on one hand, and drives a screen drum to rotate through a driving wheel, a synchronous belt and a driven wheel on the other hand;
s02: adding metal powder into the screen cylinder through the feeding pipe, wherein the metal powder enters the screen cylinder, and when the screen cylinder rotates, on one hand, the metal powder continuously moves rightwards through the guide blade on the inner wall of the screen cylinder, on the other hand, the finer metal powder is filtered through the fine filtering opening formed in the outer wall of the screen cylinder, falls downwards through the fine filtering opening and enters the feeding cylinder through the feeding cylinder;
the coarse metal powder which cannot be filtered by the fine filter opening is guided by the guide vane to continuously move rightwards, and is finally discharged from a coarse filter opening formed in the outer wall of the right end of the screen cylinder and falls into a storage bin to finish the separation of coarse metal powder and fine metal powder;
s03: the thinner metal powder falling into the feeding cylinder continuously moves to the left side under the conveying action of the conveying auger and finally enters a material receiving groove in the bottom box through the discharge port;
s04: controlling a second motor to enable a gear at the top of an output shaft of the second motor to rotate, wherein the gear rotates to drive a nut to rotate through an outer gear ring meshed with the outer wall of the gear, the nut rotates to drive a threaded rod in threaded connection with the inner wall of the nut to ascend or descend, and the threaded rod ascends or descends to drive a blocking block at the top end of the threaded rod to ascend or descend;
when the top end of the block is positioned at the bottom of any extrusion cavity, the metal powder falling from the feed opening enters the extrusion cavity under the guiding action of the slope at the top of the block;
s05: after a preset amount of metal powder enters the extrusion cavity, controlling a second motor to operate, and enabling the blocking block to move upwards through transmission to block the extrusion cavity;
s06: controlling a third motor to enable a screw rod at the top of an output shaft of the third motor to rotate, wherein the screw rod rotates to drive a screw nut in threaded connection with the outer wall of the screw rod to move left and right, and the screw nut moves left and right to drive an extrusion rod to move left and right through a vertical rod;
when the extrusion rod moves rightwards in the extrusion cavity, the extrusion rod is matched with the blocking block to extrude the metal powder, so that the metal powder is extruded and formed;
s07: after the metal powder is extruded and formed, the third motor is controlled again, the extrusion rod is moved leftwards through transmission, and the extrusion rod is separated from the extrusion cavity;
s08: the gas generating device blows gas into the transverse groove through the gas inlet pipe and the gas conveying pipe, the gas is accumulated in the transverse groove, the sealing plate is pushed outwards to be separated from the sealing groove, and the gas in the transverse groove is discharged through a gap between the sealing plate and the sealing groove and enters the extrusion cavity;
s09: the gas is filled into the extrusion chamber and pushes the extruded metal powder to the left side, so that the extruded metal powder can be discharged from the left end of the extrusion chamber.
(III) advantageous effects
Compared with the prior art, the invention provides a cavity-adjustable metal powder injection molding system and an injection method thereof, and the cavity-adjustable metal powder injection molding system has the following beneficial effects:
1. the cavity-adjustable metal powder injection molding system and the injection method thereof are characterized in that metal powder is added into a screen cylinder through a feeding pipe, the metal powder enters the screen cylinder, when the screen cylinder rotates, on one hand, the metal powder continuously moves rightwards through a guide blade on the inner wall of the screen cylinder, on the other hand, the fine metal powder is filtered through a fine filtering opening formed in the outer wall of the screen cylinder, the fine metal powder falls downwards through the fine filtering opening and enters the feeding cylinder through the feeding cylinder, and the coarse metal powder which is coarse and cannot be filtered by the fine filtering opening is guided by the guide blade to continuously move rightwards, finally, the coarse metal powder is discharged from a coarse filtering opening formed in the outer wall of the right end of the screen cylinder and falls into a storage bin, so that the separation of the coarse metal powder and the fine metal powder can be completed, only the fine metal powder is reserved, and the quality of metallurgical products.
2. The cavity-adjustable metal powder injection molding system and the injection method thereof control a second motor to rotate a gear at the top of an output shaft of the second motor, the gear rotates to drive a nut to rotate through an outer gear ring meshed with the outer wall of the gear, the nut rotates to drive a threaded rod in threaded connection with the inner wall of the nut to ascend or descend, and the threaded rod ascends or descends to drive a blocking block at the top end of the threaded rod to ascend or descend; when the top of sprue was located the bottom in arbitrary extrusion chamber, the metal powder that falls into by the feed opening can get into this extrusion chamber under the guide effect on sprue top slope, and the sprue is located the extrusion chamber that different positions guide metal powder got into different diameters, shape, can make later stage metal powder be squeezed into different shapes to, reached the effect of being convenient for adjust metal powder shaping shape.
3. After metal powder with a preset quantity enters an extrusion cavity, a second motor is controlled to run to drive a blocking block to move upwards through transmission to block the extrusion cavity, then a third motor is controlled to run to rotate a lead screw at the top of an output shaft of the third motor, the lead screw rotates to drive a screw in threaded connection with the outer wall of the lead screw to move left and right, the screw moves left and right to drive an extrusion rod to move left and right through a vertical rod, and when the extrusion rod moves right in the extrusion cavity, the extrusion rod is matched with the blocking block to extrude the metal powder, so that the metal powder is extruded and formed.
4. The cavity-adjustable metal powder injection molding system and the injection method thereof have the advantages that after metal powder is extruded and molded, the third motor is controlled again, the extrusion rod is moved leftwards through transmission, the extrusion rod is separated from the extrusion cavity, then the gas generating device blows gas into the transverse groove through the gas inlet pipe and the gas conveying pipe, the gas is accumulated in the transverse groove, the sealing plate is pushed outwards, the sealing plate is separated from the sealing groove, at the moment, the gas in the transverse groove can be discharged through a gap between the sealing plate and the sealing groove and enters the extrusion cavity, the gas is filled into the extrusion cavity, the extruded metal powder is pushed leftwards, and the extruded metal powder can be discharged from the left end of the extrusion cavity, so that the advantage of facilitating the discharge of the extruded metal powder is achieved.
Drawings
FIG. 1 is a cross-sectional view of the overall structure of the present invention;
FIG. 2 is an enlarged schematic view of a portion of a screen cylinder according to the present invention;
FIG. 3 is an enlarged view taken at A of FIG. 2 in accordance with the present invention;
FIG. 4 is an enlarged schematic view of a bottom box portion of the present invention;
FIG. 5 is an enlarged view of the invention at B of FIG. 4;
fig. 6 is a cross-sectional view of a portion of a plug and threaded rod of the present invention;
FIG. 7 is an enlarged view at C of FIG. 6 in accordance with the present invention;
FIG. 8 is a schematic view of an extrusion chamber and an extrusion stem in an embodiment of the present invention.
In the figure: 1. a feed barrel; 2. a connecting frame; 3. a first motor; 4. a connecting shaft; 5. conveying the auger; 6. feeding into a charging barrel; 7. feeding into a hopper; 8. a feed tube; 9. fixing the bearing; 10. a screen cylinder; 11. a guide vane; 12. fine filtering; 13. cleaning with a brush; 14. a coarse filtration port; 15. a material receiving box; 16. a storage bin; 17. a horizontal axis; 18. a driven wheel; 19. a synchronous belt; 20. a driving wheel; 21. a feeding port; 22. a bottom box; 23. a material receiving groove; 24. an extrusion chamber; 2401. a first extrusion groove; 2402. a second extrusion groove; 2403. a third extrusion groove; 25. blocking; 26. a slope; 27. a threaded rod; 28. a base plate; 29. a limiting rod; 30. a nut; 31. an outer ring gear; 32. a gear; 33. a second motor; 34. an extrusion stem; 3401. a first pressure lever; 3402. a second compression bar; 3403. a third compression bar; 35. a vertical rod; 36. a guide sleeve; 37. a guide bar; 38. a nut; 39. a screw rod; 40. a third motor; 41. a baffle plate; 42. an air inlet pipe; 43. a gas delivery pipe; 44. a transverse groove; 45. a fixing plate; 46. a movable rod; 47. a tail plate; 48. a spring; 49. a sealing plate; 50. sealing the groove.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Referring to fig. 1-8, a cavity-adjustable metal powder injection molding system includes a feeding cylinder 1, a connecting frame 2 is fixedly installed on the outer wall of the feeding cylinder 1, a first motor 3 is fixedly installed on the outer wall of the connecting frame 2, a connecting shaft 4 is fixedly connected to the top of an output shaft of the first motor 3, a conveying auger 5 is fixedly installed at the tail end of the connecting shaft 4, and the conveying auger 5 is movably arranged inside the feeding cylinder 1;
the top of the feeding barrel 1 is fixedly provided with a feeding barrel 6, the top of the feeding barrel 6 is fixedly provided with a feeding hopper 7, the outer wall of the feeding hopper 7 is fixedly provided with a feeding pipe 8, and a screening device is connected between the feeding pipe 8 and the connecting shaft 4 and can screen metal powder added from the feeding pipe 8 to remove large-particle metal powder;
a bottom box 22 is fixedly installed at the left end of the bottom of the feeding barrel 1, a material receiving groove 23 is formed inside the bottom box 22, and a feed opening 21 communicated with the material receiving groove 23 is formed in the outer wall of the feeding barrel 1;
the bottom box 22 is also internally provided with a plurality of extrusion cavities 24, and a plugging device movably arranged in the material receiving groove 23 is used for plugging the extrusion cavities 24 or opening the extrusion cavities 24 and guiding metal powder into the interior;
the extrusion rods 34 are inserted into the extrusion cavities 24, the third motor 40 is fixedly mounted at the top of the bottom box 22, and the control device is connected between the third motor 40 and the extrusion rods 34 and used for driving the extrusion rods 34 to move back and forth in the extrusion cavities 24 so as to extrude metal powder to be molded or open the extrusion cavities 24 to discharge the molded metal powder;
in this embodiment, the material sieving device comprises a fixed bearing 9, a sieve cylinder 10, a fine filtering port 12 and a coarse filtering port 14, the fixed bearing 9 is fixedly installed on the inner top wall of the feeding hopper 7, the sieve cylinder 10 is fixedly installed on the inner wall of the fixed bearing 9, and a guide vane 11 is arranged on the inner wall of the sieve cylinder 10 and used for guiding the metal powder to roll to the right side;
the bottom of the feeding pipe 8 extends into the screen drum 10 from the left end of the screen drum 10 and is not connected with the screen drum 10, the right end of the screen drum 10 is fixedly provided with a transverse shaft 17, the outer wall of the transverse shaft 17 is fixedly provided with a driven wheel 18, the outer wall of the connecting shaft 4 is fixedly provided with a driving wheel 20, and the driving wheel 20 is connected with the driven wheel 18 through a synchronous belt 19;
the outer wall of the screen cylinder 10 positioned in the feeding hopper 7 is provided with a fine filtering opening 12, and the opening position of the fine filtering opening 12 corresponds to the top position of the feeding cylinder 6;
a coarse filter opening 14 is formed in the outer wall of the right end of the screen cylinder 10, a material receiving box 15 is fixedly mounted on the outer wall of the feeding hopper 7, a bin 16 is formed inside the material receiving box 15, and the bin 16 and the coarse filter opening 14 are on the same vertical line;
when the screen cylinder 10 rotates, on one hand, the metal powder continuously moves rightwards through the guide vane 11 on the inner wall of the screen cylinder, on the other hand, the fine filtering opening 12 formed in the outer wall of the screen cylinder filters the fine metal powder, the fine metal powder falls downwards through the fine filtering opening 12 and enters the feeding cylinder 1 through the charging barrel 6, and the coarse metal powder which is coarse and cannot be filtered by the fine filtering opening 12 is guided by the guide vane 11 to continuously move rightwards, and is finally discharged from the coarse filtering opening 14 formed in the outer wall of the right end of the screen cylinder 10 and falls into the storage bin 16, so that the separation of the coarse metal powder and the fine metal powder can be completed, only the fine metal powder is reserved, and the quality of metallurgical products is improved.
In this embodiment, the inner top wall of the feeding hopper 7 is further fixedly provided with a cleaning brush 13, and when the screen drum 10 rotates, the cleaning brush 13 is used for cleaning metal powder on the inner wall of the fine filtering opening 12, so as to prevent the metal powder from blocking the fine filtering opening 12.
In the embodiment, the plugging device comprises a plugging block 25, a threaded rod 27, a nut 30 and a second motor 33, wherein the plugging block 25 is movably arranged on the inner wall of the material receiving groove 23, a slope 26 inclined towards the left side is formed at the top of the plugging block 25, the threaded rod 27 is rotatably connected to the bottom of the plugging block 25, the bottom end of the threaded rod 27 extends to the outside of the bottom box 22 and is fixedly connected with a bottom plate 28, a limiting rod 29 is inserted into the bottom plate 28, and the limiting rod 29 is fixedly arranged at the bottom of the bottom box 22;
the outer wall threaded connection of threaded rod 27 has nut 30, and nut 30 rotates and sets up in the bottom of under casing 22, and the outer wall fixed mounting of nut 30 has outer ring gear 31, and the outer wall meshing of outer ring gear 31 has gear 32, and gear 32 fixed mounting is at the output shaft top of second motor 33, and second motor 33 fixed mounting is on the outer wall of under casing 22.
In this embodiment, the control device includes a screw 39, a nut 38 and a vertical rod 35, the screw 39 is fixedly installed at the top of an output shaft of the third motor 40, the nut 38 is connected to an outer wall of the screw 39 in a threaded manner, the vertical rod 35 is fixedly installed on an outer wall of the nut 38, and the tail end of the extrusion rod 34 is fixedly installed on an outer wall of the vertical rod 35;
the bottom of the vertical rod 35 is also fixedly provided with a guide sleeve 36, a guide rod 37 is inserted into the guide sleeve 36, the guide rod 37 is fixedly arranged on the outer wall of the bottom box 22, and the sleeve connection of the guide sleeve 36 on the guide rod 37 limits the rotation of the nut 38 and the vertical rod 35, so that the nut 38 and the vertical rod 35 can only move in a left-right translation manner under the drive of the screw rod 39.
The ends of the screw rod 39 and the guide rod 37 are fixedly provided with a baffle 41 for preventing the guide sleeve 36 from falling off the guide rod 37 or preventing the screw nut 38 from being separated from the screw rod 39.
In this embodiment, referring to fig. 8, the extrusion cavity 24 includes a first extrusion groove 2401, a second extrusion groove 2402 and a third extrusion groove 2403 with a predetermined shape and diameter, the extrusion rod 34 includes a first pressing rod 3401, a second pressing rod 3402 and a third pressing rod 3403, and the shape and diameter of the first pressing rod 3401, the second pressing rod 3402 and the third pressing rod 3403 are respectively coupled with the shape and diameter of the inner wall of the first extrusion groove 2401, the second extrusion groove 2402 and the third extrusion groove 2403;
when the metal powder is located in the first pressing groove 2401, the second pressing groove 2402 or the third pressing groove 2403, the metal powder is pressed in different shapes, so that the metal powder is located in different pressing cavities 24, and the forming shape of the metal powder can be adjusted.
In this embodiment, the threaded rod 27 and the block 25 are further provided with a material pushing device inside, and when the block 25 blocks the extrusion cavity 24, the material pushing device is used for ejecting gas to push the extruded metal powder out of the extrusion cavity 24.
In this embodiment, the pushing device includes an air pipe 43, a transverse groove 44, a movable rod 46 and a sealing plate 49, the transverse groove 44 is formed inside the blocking block 25, the air pipe 43 communicated with the transverse groove 44 is formed inside the threaded rod 27, the tail end of the air pipe 43 is fixedly connected with an air inlet pipe 42, and the tail end of the air inlet pipe 42 is fixedly connected with a gas generating device;
a fixed plate 45 is fixedly installed on the inner wall of the transverse groove 44, a movable rod 46 is inserted into the fixed plate 45, a tail plate 47 is fixedly installed at the right end of the movable rod 46, and a spring 48 is fixedly connected between the tail plate 47 and the fixed plate 45;
a sealing plate 49 is fixedly mounted to the left end of the movable rod 46, the outer wall of the right side of the sealing plate 49 is a circular truncated cone, and a sealing groove 50 coupled to the outer wall of the sealing plate 49 is formed at the left end of the lateral groove 44.
An injection method of a cavity-adjustable metal powder injection molding system is used for the cavity-adjustable metal powder injection molding system and comprises the following steps:
the method comprises the following steps: starting the first motor 3 to enable the connecting shaft 4 at the top of the output shaft of the first motor 3 to rotate, wherein the connecting shaft 4 rotates to drive the conveying auger 5 at the tail end to rotate on one hand, and drives the screen drum 10 to rotate through the driving wheel 20, the synchronous belt 19 and the driven wheel 18 on the other hand;
step two: adding metal powder into a screen cylinder 10 through a feeding pipe 8, wherein the metal powder enters the screen cylinder 10, when the screen cylinder 10 rotates, on one hand, the metal powder is continuously moved rightwards through a guide vane 11 on the inner wall of the screen cylinder, on the other hand, the finer metal powder is filtered through a fine filtering opening 12 formed in the outer wall of the screen cylinder, falls downwards through the fine filtering opening 12 and enters the feeding cylinder 1 through a feeding cylinder 6;
the thicker metal powder which cannot be filtered by the fine filtering port 12 is guided by the guide vane 11 to continuously move rightwards, and finally is discharged from a coarse filtering port 14 formed on the outer wall of the right end of the screen cylinder 10 and falls into a storage bin 16 to complete the separation of the coarse metal powder and the fine metal powder;
step three: the thinner metal powder falling into the feeding cylinder 1 continuously moves to the left side under the conveying action of the conveying auger 5 and finally enters a material receiving groove 23 in the bottom box 22 through the discharge opening 21;
step four: controlling a second motor 33 to enable a gear 32 at the top of an output shaft of the second motor to rotate, driving a nut 30 to rotate by the rotation of the gear 32 through an outer gear ring 31 meshed with the outer wall of the gear, driving a threaded rod 27 in threaded connection with the inner wall of the nut 30 to ascend or descend by the rotation of the nut 30, and driving a blocking block 25 at the top end of the threaded rod 27 to ascend or descend by the ascending or descending of the threaded rod 27;
when the top end of the block 25 is positioned at the bottom of any extrusion cavity 24, the metal powder falling from the feed opening 21 enters the extrusion cavity 24 under the guiding action of the top slope 26 of the block 25;
step five: after a preset amount of metal powder enters the extrusion cavity 24, controlling the second motor 33 to operate to drive the blocking block 25 to move upwards through transmission, and blocking the extrusion cavity 24;
step six: controlling a third motor 40 to rotate a screw rod 39 at the top of an output shaft of the third motor, wherein the screw rod 39 rotates to drive a screw nut 38 in threaded connection with the outer wall of the screw rod to move left and right, and the screw nut 38 moves left and right to drive an extrusion rod 34 to move left and right through a vertical rod 35;
when the extrusion rod 34 moves rightwards in the extrusion cavity 24, the extrusion rod 34 is matched with the block 25 to extrude the metal powder, so that the metal powder is extruded and formed;
step seven: after the metal powder is extruded and formed, the third motor 40 is controlled again, the extrusion rod 34 is moved leftwards through transmission, and the extrusion rod 34 is separated from the extrusion cavity 24;
step eight: the gas generator blows gas into the transverse groove 44 through the gas inlet pipe 42 and the gas conveying pipe 43, the gas is accumulated in the transverse groove 44, the sealing plate 49 is pushed outwards, the sealing plate 49 is separated from the sealing groove 50, and at the moment, the gas in the transverse groove 44 is discharged through a gap between the sealing plate 49 and the sealing groove 50 and enters the extrusion cavity 24;
step nine: the gas is charged into the extrusion chamber 24 and pushes the extruded metal powder to the left side, so that the extruded metal powder is discharged from the left end of the extrusion chamber 24.
The working principle and the using process of the invention are as follows:
starting the first motor 3 to enable the connecting shaft 4 at the top of the output shaft of the first motor 3 to rotate, wherein the connecting shaft 4 rotates to drive the conveying auger 5 at the tail end to rotate on one hand, and drives the screen drum 10 to rotate through the driving wheel 20, the synchronous belt 19 and the driven wheel 18 on the other hand;
adding metal powder into a screen cylinder 10 through a feeding pipe 8, wherein the metal powder enters the screen cylinder 10, when the screen cylinder 10 rotates, on one hand, the metal powder is continuously moved rightwards through a guide vane 11 on the inner wall of the screen cylinder, on the other hand, the finer metal powder is filtered through a fine filtering opening 12 formed in the outer wall of the screen cylinder, falls downwards through the fine filtering opening 12 and enters the feeding cylinder 1 through a feeding cylinder 6;
the thicker metal powder which cannot be filtered by the fine filtering port 12 is guided by the guide vane 11 to continuously move rightwards, and finally is discharged from a coarse filtering port 14 formed on the outer wall of the right end of the screen cylinder 10 and falls into a storage bin 16 to complete the separation of the coarse metal powder and the fine metal powder;
the thinner metal powder falling into the feeding cylinder 1 continuously moves to the left side under the conveying action of the conveying auger 5 and finally enters a material receiving groove 23 in the bottom box 22 through the discharge opening 21;
controlling a second motor 33 to enable a gear 32 at the top of an output shaft of the second motor to rotate, driving a nut 30 to rotate by the rotation of the gear 32 through an outer gear ring 31 meshed with the outer wall of the gear, driving a threaded rod 27 in threaded connection with the inner wall of the nut 30 to ascend or descend by the rotation of the nut 30, and driving a blocking block 25 at the top end of the threaded rod 27 to ascend or descend by the ascending or descending of the threaded rod 27;
when the top end of the block 25 is positioned at the bottom of any extrusion cavity 24, the metal powder falling from the feed opening 21 enters the extrusion cavity 24 under the guiding action of the top slope 26 of the block 25;
after a preset amount of metal powder enters the extrusion cavity 24, controlling the second motor 33 to operate to drive the blocking block 25 to move upwards through transmission, and blocking the extrusion cavity 24;
controlling a third motor 40 to rotate a screw rod 39 at the top of an output shaft of the third motor, wherein the screw rod 39 rotates to drive a screw nut 38 in threaded connection with the outer wall of the screw rod to move left and right, and the screw nut 38 moves left and right to drive an extrusion rod 34 to move left and right through a vertical rod 35;
when the extrusion rod 34 moves rightwards in the extrusion cavity 24, the extrusion rod 34 is matched with the block 25 to extrude the metal powder, so that the metal powder is extruded and formed;
after the metal powder is extruded and formed, the third motor 40 is controlled again, the extrusion rod 34 is moved leftwards through transmission, and the extrusion rod 34 is separated from the extrusion cavity 24;
the gas generator blows gas into the transverse groove 44 through the gas inlet pipe 42 and the gas conveying pipe 43, the gas is accumulated in the transverse groove 44, the sealing plate 49 is pushed outwards, the sealing plate 49 is separated from the sealing groove 50, and at the moment, the gas in the transverse groove 44 is discharged through a gap between the sealing plate 49 and the sealing groove 50 and enters the extrusion cavity 24;
the gas is charged into the extrusion chamber 24 and pushes the extruded metal powder to the left side, so that the extruded metal powder is discharged from the left end of the extrusion chamber 24.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A cavity-adjustable metal powder injection molding system comprising a feed cylinder (1), characterized in that: the feeding device comprises a feeding barrel (1), a connecting frame (2) is fixedly arranged on the outer wall of the feeding barrel (1), a first motor (3) is fixedly arranged on the outer wall of the connecting frame (2), a connecting shaft (4) is fixedly connected to the top of an output shaft of the first motor (3), a conveying auger (5) is fixedly arranged at the tail end of the connecting shaft (4), and the conveying auger (5) is movably arranged inside the feeding barrel (1); the feeding device comprises a feeding barrel (1), a feeding hopper (7), a feeding pipe (8) and a screening device, wherein the feeding barrel (6) is fixedly installed at the top of the feeding barrel (1), the feeding hopper (7) is fixedly installed at the top of the feeding barrel (6), the feeding pipe (8) is fixedly installed on the outer wall of the feeding hopper (7), and the screening device is connected between the feeding pipe (8) and a connecting shaft (4) and can screen metal powder added from the feeding pipe (8) to remove large-particle metal powder; a bottom box (22) is fixedly installed at the left end of the bottom of the feeding barrel (1), a material receiving groove (23) is formed in the bottom box (22), and a feed opening (21) communicated with the material receiving groove (23) is formed in the outer wall of the feeding barrel (1); the bottom box (22) is also internally provided with a plurality of extrusion cavities (24), and the plugging device is movably arranged in the material receiving groove (23) and is used for plugging the extrusion cavities (24) or opening the extrusion cavities (24) and guiding metal powder into the extrusion cavities (24); the metal powder extrusion device is characterized in that extrusion rods (34) are inserted into the extrusion cavities (24), a third motor (40) is fixedly mounted at the top of the bottom box (22), and a control device connected between the third motor (40) and the extrusion rods (34) is used for driving the extrusion rods (34) to move back and forth in the extrusion cavities (24) so as to extrude metal powder to be molded or open the extrusion cavities (24) to discharge the molded metal powder.
2. The cavity adjustable metal powder injection molding system of claim 1, wherein: the screening device comprises a fixed bearing (9), a screening cylinder (10), a fine filtering port (12) and a coarse filtering port (14), the fixed bearing (9) is fixedly installed on the inner top wall of the feeding hopper (7), the screening cylinder (10) is fixedly installed on the inner wall of the fixed bearing (9), and a guide vane (11) is arranged on the inner wall of the screening cylinder (10) and used for guiding metal powder to roll to the right side; the bottom of filling tube (8) is extended to the inside of a sieve section of thick bamboo (10) and is disconnected from with a sieve section of thick bamboo (10) by the left end of a sieve section of thick bamboo (10), the right-hand member fixed mounting of a sieve section of thick bamboo (10) has cross axle (17), the outer wall fixed mounting of cross axle (17) has from driving wheel (18), the outer wall fixed mounting of connecting axle (4) has action wheel (20), action wheel (20) and from being connected through hold-in range (19) between driving wheel (18).
3. The cavity adjustable metal powder injection molding system of claim 2, wherein: the outer wall of the screen drum (10) positioned in the feeding hopper (7) is provided with a fine filtering opening (12), and the opening position of the fine filtering opening (12) corresponds to the top position of the feeding drum (6); coarse filtration mouth (14) have been seted up to the outer wall of a sieve section of thick bamboo (10) right-hand member, the outer wall fixed mounting who goes into hopper (7) has material receiving box (15), the inside of material receiving box (15) is formed with feed bin (16), feed bin (16) and coarse filtration mouth (14) are on same vertical line.
4. The cavity adjustable metal powder injection molding system of claim 3, wherein: go into the interior roof of hopper (7) still fixed mounting have brush cleaner (13), brush cleaner (13) are used for cleaning the metal powder on smart mouth (12) inner wall of straining, prevent that metal powder from blockking up smart mouth (12) of straining.
5. The cavity adjustable metal powder injection molding system of claim 4, wherein: the blocking device comprises a blocking block (25), a threaded rod (27), a nut (30) and a second motor (33), the blocking block (25) is movably arranged on the inner wall of the material receiving groove (23), a slope (26) inclined towards the left side is formed at the top of the blocking block (25), the threaded rod (27) is rotatably connected to the bottom of the blocking block (25), the bottom end of the threaded rod (27) extends to the outside of the bottom box (22) and is fixedly connected with a bottom plate (28), a limiting rod (29) is inserted into the bottom plate (28), and the limiting rod (29) is fixedly mounted at the bottom of the bottom box (22); the outer wall threaded connection of threaded rod (27) has nut (30), nut (30) rotate and set up the bottom in under casing (22), the outer wall fixed mounting of nut (30) has outer ring gear (31), the outer wall meshing of outer ring gear (31) has gear (32), gear (32) fixed mounting is at the output shaft top of second motor (33), second motor (33) fixed mounting is on the outer wall of under casing (22).
6. The cavity adjustable metal powder injection molding system of claim 5, wherein: the control device comprises a screw rod (39), a nut (38) and a vertical rod (35), the screw rod (39) is fixedly installed at the top of an output shaft of a third motor (40), the nut (38) is in threaded connection with the outer wall of the screw rod (39), the vertical rod (35) is fixedly installed on the outer wall of the nut (38), and the tail end of the extrusion rod (34) is fixedly installed on the outer wall of the vertical rod (35); the bottom of the vertical rod (35) is also fixedly provided with a guide sleeve (36), a guide rod (37) is inserted into the guide sleeve (36), and the guide rod (37) is fixedly arranged on the outer wall of the bottom box (22); the tail ends of the screw rod (39) and the guide rod (37) are fixedly provided with baffle plates (41) for preventing the guide sleeve (36) from falling off the guide rod (37) or preventing the screw nut (38) from falling off the screw rod (39).
7. The cavity adjustable metal powder injection molding system of claim 6, wherein: the extrusion chamber (24) comprises a first extrusion groove (2401), a second extrusion groove (2402) and a third extrusion groove (2403) which are preset in shape and diameter, the extrusion rod (34) comprises a first pressing rod (3401), a second pressing rod (3402) and a third pressing rod (3403), and the shapes and the diameters of the first pressing rod (3401), the second pressing rod (3402) and the third pressing rod (3403) are respectively coupled with the shapes and the diameters of the inner walls of the first extrusion groove (2401), the second extrusion groove (2402) and the third extrusion groove (2403).
8. The cavity adjustable metal powder injection molding system of claim 7, wherein: the threaded rod (27) and the blocking block (25) are internally provided with a material pushing device, and when the blocking block (25) blocks the extrusion cavity (24), the material pushing device is used for ejecting gas to push the extruded metal powder out of the extrusion cavity (24).
9. The cavity adjustable metal powder injection molding system of claim 8, wherein: the pushing device comprises an air conveying pipe (43), a transverse groove (44), a movable rod (46) and a sealing plate (49), the transverse groove (44) is formed inside the blocking block (25), the air conveying pipe (43) communicated with the transverse groove (44) is formed inside the threaded rod (27), the tail end of the air conveying pipe (43) is fixedly connected with an air inlet pipe (42), and the tail end of the air inlet pipe (42) is fixedly connected with a gas generating device; a fixed plate (45) is fixedly installed on the inner wall of the transverse groove (44), a movable rod (46) is inserted into the fixed plate (45), a tail plate (47) is fixedly installed at the right end of the movable rod (46), and a spring (48) is fixedly connected between the tail plate (47) and the fixed plate (45);
the left end fixed mounting of movable rod (46) has closing plate (49), the outer wall on closing plate (49) right side is the round platform shape, the left end of horizontal groove (44) is formed with sealing groove (50) of the outer wall coupling of closing plate (49).
10. An injection method of a cavity adjustable metal powder injection molding system, for a cavity adjustable metal powder injection molding system according to any one of claims 1 to 9, characterized in that: the method comprises the following steps:
s01: starting a first motor (3) to enable a connecting shaft (4) at the top of an output shaft of the first motor (3) to rotate, wherein the connecting shaft (4) rotates to drive a conveying auger (5) at the tail end of the connecting shaft to rotate on one hand, and drive a screen drum (10) to rotate through a driving wheel (20), a synchronous belt (19) and a driven wheel (18) on the other hand;
s02: metal powder is added into a screen drum (10) through a feeding pipe (8), the metal powder enters the screen drum (10), when the screen drum (10) rotates, on one hand, the metal powder is continuously moved rightwards through a guide vane (11) on the inner wall of the screen drum, on the other hand, finer metal powder is filtered through a fine filtering opening (12) formed in the outer wall of the screen drum, and the finer metal powder falls downwards through the fine filtering opening (12) and enters the feeding barrel (1) through a feeding barrel (6);
the coarse metal powder which cannot be filtered by the fine filtering opening (12) is guided by the guide vane (11) to continuously move rightwards, and is finally discharged from a coarse filtering opening (14) formed in the outer wall of the right end of the screen cylinder (10) and falls into a storage bin (16) to complete the separation of coarse metal powder and fine metal powder;
s03: the fine metal powder falling into the feeding barrel (1) continuously moves to the left side under the conveying action of the conveying auger (5) and finally enters a material receiving groove (23) in the bottom box (22) through the discharging opening (21);
s04: controlling a second motor (33) to enable a gear (32) at the top of an output shaft of the second motor to rotate, wherein the gear (32) rotates to drive a nut (30) to rotate through an outer gear ring (31) meshed with the outer wall of the gear, the nut (30) rotates to drive a threaded rod (27) connected with the inner wall of the nut in a threaded mode to ascend or descend, and the threaded rod (27) ascends or descends to drive a blocking block (25) at the top end of the threaded rod to ascend or descend;
when the top end of the block (25) is positioned at the bottom of any extrusion cavity (24), the metal powder falling from the feed opening (21) enters the extrusion cavity (24) under the guiding action of the top slope (26) of the block (25);
s05: after a preset amount of metal powder enters the extrusion cavity (24), controlling a second motor (33) to operate, and enabling the blocking block (25) to move upwards through transmission to block the extrusion cavity (24);
s06: the third motor (40) is controlled to rotate a screw rod (39) at the top of an output shaft of the third motor, the screw rod (39) rotates to drive a screw nut (38) in threaded connection with the outer wall of the screw nut to move left and right, and the screw nut (38) moves left and right and drives an extrusion rod (34) to move left and right through a vertical rod (35);
when the extrusion rod (34) moves rightwards in the extrusion cavity (24), the extrusion rod (34) is matched with the block (25) to extrude the metal powder, so that the metal powder is extruded and formed;
s07: after the metal powder is extruded and formed, the third motor (40) is controlled again, the extrusion rod (34) is moved leftwards through transmission, and the extrusion rod (34) is separated from the extrusion cavity (24);
s08: the gas generator blows gas into the transverse groove (44) through the gas inlet pipe (42) and the gas conveying pipe (43), the gas is accumulated in the transverse groove (44), the sealing plate (49) is pushed outwards, the sealing plate (49) is separated from the sealing groove (50), and the gas in the transverse groove (44) is discharged through a gap between the sealing plate (49) and the sealing groove (50) and enters the extrusion cavity (24);
s09: the gas is charged into the extrusion chamber (24) and pushes the extruded metal powder to the left side, so that the extruded metal powder can be discharged from the left end of the extrusion chamber (24).
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| CN202110272760.8A CN112958767A (en) | 2021-03-13 | 2021-03-13 | Cavity-adjustable metal powder injection molding system and injection method thereof |
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| CN202110272760.8A CN112958767A (en) | 2021-03-13 | 2021-03-13 | Cavity-adjustable metal powder injection molding system and injection method thereof |
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| CN113618065A (en) * | 2021-08-08 | 2021-11-09 | 曹菁 | Powder metallurgy injection molding system |
| CN113681697A (en) * | 2021-08-19 | 2021-11-23 | 青岛金福鑫塑料机械有限公司 | Processing equipment for producing plate by utilizing fly ash granulation and preparation process thereof |
| CN114871428A (en) * | 2022-07-07 | 2022-08-09 | 徐州威德金属制品有限公司 | Quantitative feeding device for metal powder processing |
| CN116037927A (en) * | 2023-02-28 | 2023-05-02 | 连云港富驰智造科技有限公司 | Powder metallurgy injection molding device |
| CN116079050A (en) * | 2022-11-25 | 2023-05-09 | 广州市迅兴精密工业有限公司 | Metal powder injection molding equipment |
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Application publication date: 20210615 |