CN112248615B - Graphite seal forming device - Google Patents
Graphite seal forming device Download PDFInfo
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- CN112248615B CN112248615B CN202011065316.0A CN202011065316A CN112248615B CN 112248615 B CN112248615 B CN 112248615B CN 202011065316 A CN202011065316 A CN 202011065316A CN 112248615 B CN112248615 B CN 112248615B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
- B41C1/00—Forme preparation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
- B41C1/00—Forme preparation
- B41C1/14—Forme preparation for stencil-printing or silk-screen printing
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Abstract
The invention relates to the technical field of processing of graphite seals, in particular to a graphite seal forming device which comprises a first feeding bin, a second feeding bin, a rotary table, a forming device, a first pressing device and a second pressing device, the forming device is matched with the first pressing device to form a compact bottom layer stamp blank for engraving, then the second pressing device is used for pressing and forming an upper layer stamp main body which is formed by graphite raw material mixture containing fluoride salt on the basis of the bottom layer stamp blank, a material channel is formed in the stamp main body, then the fluoride salt is decomposed in the graphitization process, and forming a pore channel in the seal main body, finally adding resin particles into the material channel, and heating to enable the resin particles to form a protective layer on the surface layer of the graphite seal blank along the pore channel, so that the resin is firmly adsorbed on the graphite seal, and the technical problem of separation of graphite seal powder particles is solved.
Description
Technical Field
The invention relates to the technical field of graphite seal processing, in particular to a graphite seal forming device.
Background
Graphite is an allotrope of carbon, a gray black, opaque solid with a density of 2.25 grams per cubic centimeter, a melting point of 3652 ℃ and a boiling point of 4827 ℃. Stable chemical property, corrosion resistance and difficult reaction with acid, alkali and other medicaments. At 687 deg.C, carbon dioxide is generated by combustion in oxygen. Can be oxidized by strong oxidant such as concentrated nitric acid, potassium permanganate, etc. It can be used as antiwear agent and lubricant, high-purity graphite as neutron moderator in atomic reactor, crucible, electrode, brush, dry cell, graphite fibre, heat exchanger, cooler, arc furnace, arc lamp and pencil lead.
When graphite is used for manufacturing a graphite seal, due to the characteristics of graphite, the surface of the graphite seal is not processed, and the situation that powdery particle substances fall off can occur after the graphite seal is used for a long time, so that the surface of the graphite seal needs to be processed, the powdery particle substances are prevented from falling off, the resin material is coated on the surface of the graphite seal in the currently adopted mode, but the resin material can also fall off from the surface of the graphite seal after the graphite seal is used for a long time.
In Chinese patent with the patent application number of CN201510116004.0, the invention discloses a processing technology of a siliconized graphite product, 1, a graphite blank substrate is firstly subjected to rough machining and finish machining to obtain a graphite blank with a smooth surface, and the processing allowance is reserved for 0.05-0.5 mm; 2, carrying out graphite silicification on the graphite blank by adopting a vacuum vapor deposition reaction method to form a silicified graphite crude product with a silicon carbide layer on the surface of the graphite blank; 3, soaking the crude product of the silicified graphite obtained in the step 2 in molten sodium hydroxide to remove free silicon in the molten sodium hydroxide; and 4, finally, sequentially washing, drying and machining to obtain the needed silicified graphite product. The method adopts a vapor deposition reaction method to carry out silicon carbonization treatment on the surface of the finely-finished graphite, the surface of the graphite blank is smooth and clean, the uniform permeation of silicon is facilitated, and the damage to a silicon carbide layer formed on the surface is small during the post-mechanical processing; the reserved machining allowance is small, the post machining is easy, the precision of the siliconized graphite product is easy to control, and the yield is higher than 98%.
Although the technical solution disclosed in the above patent discloses a process for processing a siliconized graphite product, the solution is not suitable for processing a graphite stamp.
Disclosure of Invention
In order to solve the problems, the invention provides a graphite stamp forming device, which is characterized in that a forming device is matched with a first pressing device to form a compact bottom stamp blank for engraving, then an upper layer of a stamp main body formed by a graphite raw material mixture containing fluoride salt is formed by pressing through a second pressing device on the basis of the bottom stamp blank, a material channel is formed in the stamp main body, then the fluoride salt is decomposed in the graphitization process, a pore channel is formed in the stamp main body, finally resin particles are added into the material channel, and the resin particles are heated to form a protective layer on the surface layer of the graphite stamp blank along the pore channel, so that the resin is firmly adsorbed on a graphite stamp, and the technical problem of powdery separation of graphite stamp particles is solved.
In order to achieve the purpose, the invention provides the following technical scheme:
a graphite seal forming device comprises a first feeding bin and a second feeding bin which are arranged side by side, wherein a graphite raw material mixture subjected to stirring and kneading is stored in the first feeding bin, and a graphite raw material mixture containing fluoride salt subjected to stirring and kneading is stored in the second feeding bin;
The rotating disc is rotatably arranged right below the first feeding bin and the second feeding bin, and the first feeding bin is positioned in front of the second feeding bin along the rotating direction of the rotating disc;
the forming devices are arranged on the rotary table at equal intervals along the circumference of the axis of the rotary table and are provided with five groups, each forming device comprises a bottom plate and a forming cylinder, the forming cylinders are fixedly arranged on the rotary table and synchronously rotate along with the rotary table, the bottom plates are arranged at the bottom of the forming cylinders, and the bottom plates and the forming cylinders are combined to form forming cavities;
the first pressing device is arranged above the rotary table, is arranged between the first feeding bin and the second feeding bin, and is used for extruding and pressing the graphite raw material mixture added into the forming cylinder from the first feeding bin; and
the second suppression device, the second suppression device with a shaping section of thick bamboo one-to-one sets up, and it installs in the correspondence the open-top department of a shaping section of thick bamboo, it follows the rotation of carousel, and it includes tilting mechanism, rotary mechanism and telescopic machanism, tilting mechanism articulated install in the open-top department of a shaping section of thick bamboo, rotary mechanism reaches telescopic machanism all install in on the tilting mechanism, rotary mechanism drive telescopic machanism is flexible the extrusion, it is right by the graphite raw materials mixture that contains fluoride salt that the second adds the feed bin input in the shaping section of thick bamboo extrudees the suppression, makes the top of shaping intracavity fashioned graphite seal blank forms the material way that extends into this graphite seal blank inside.
As an improvement, a first feeding station, a pressing station, a second feeding station, a turning station, a forming station and a discharging station are sequentially arranged on the rotary table around the rotation direction of the rotary table, the first feeding station is located under the first feeding bin, the pressing station is located under the first pressing device, the second feeding station is located under the second feeding bin, the turning station is located on the opposite side of the first feeding station, the forming station is located on the opposite side of the pressing station, and the discharging station is located on the opposite side of the second feeding station.
As an improvement, the forming device is located when reinforced station department of first reinforced station, pressing station and second, by first reinforced storehouse, first suppression device and second are added the storehouse and are accomplished one time reinforced, once suppress and the reinforced work of secondary in proper order respectively, the forming device is located when upset station department, the tilting mechanism start of second suppression device makes rotary mechanism and telescopic machanism upset cover the open-top of a shaping section of thick bamboo, the forming device certainly upset station shifts to the in-process of shaping station, rotary mechanism drive telescopic machanism inserts the shaping intracavity carries out the secondary pressing, the forming device certainly shaping station shifts to the in-process of ejection of compact station, the bottom plate lifting will the shaping intracavity graphite seal blank is ejecting.
As an improvement, the forming cavity is square, and the bottom plate and the forming cavity are arranged in a profiling mode.
As an improvement, a lifting mechanism is arranged on the bottom plate, and the lifting mechanism comprises:
the screw rod is vertically connected and arranged below the bottom plate;
the gear is rotatably arranged at the bottom of the forming cylinder;
the screw rod nut is embedded in the central position of the gear and correspondingly matched with the screw rod;
the lifting rack is arranged between the forming station and the discharging station, and is matched with the gear to drive the screw rod nut to rotate so as to lift the bottom plate;
and the descending rack is arranged between the discharging station and the first feeding station, and is matched with the gear to drive the screw rod nut to rotate reversely, so that the bottom plate is descended and reset.
As a refinement, the first pressing device includes:
the pressing air cylinder is vertically arranged and is pushed downwards; and
the pressing plate is horizontally arranged on the pushing end of the pressing cylinder, and the shape of the cross section of the pressing plate and the shape of the cross section of the forming cavity are arranged in a copying manner.
As an improvement, the turnover mechanism comprises:
one end of the length direction of the turnover plate is hinged with the top of the forming barrel, and the other end of the turnover plate is freely arranged in a turnover and swinging mode;
the connecting plate is vertically arranged on the turnover plate, is close to the hinged end part of the turnover plate, and is provided with a kidney-shaped groove;
the roller is clamped in the kidney-shaped groove and can freely rotate in the kidney-shaped groove;
one end of the connecting arm is rotatably connected with the roller;
the guide wheel is horizontally and rotatably arranged at the other end of the connecting arm relative to the roller;
the guide disc is coaxially and fixedly arranged above the rotary disc, a guide groove for the guide wheel to roll is formed in the edge of the guide disc, and the guide groove comprises a first arc-shaped section and a second arc-shaped section, wherein the first arc-shaped section is arranged between the discharging station and the overturning station along the rotation direction of the rotary disc, and the second arc-shaped section is arranged between the overturning station and the forming station; and
and the supporting arm is arranged on the turntable, and the top of the supporting arm is sleeved with the connecting arm in a sliding manner.
As an improvement, the top of the forming cylinder is provided with a clamping groove which is clamped with the end part of the turnover plate which can freely turn over and swing.
As an improvement, the rotary mechanism comprises:
the rotating nut is rotatably arranged in the middle of the length direction of the turnover plate;
the rotary screw rod is vertically arranged on the turnover plate, is correspondingly matched with the rotary nut, and is arranged at the end part of the telescopic mechanism and fixedly connected with the telescopic mechanism;
the driven belt pulley is coaxially sleeved outside the rotating nut and synchronously rotates with the rotating nut;
the driving belt pulley is rotatably arranged at the end part of the turnover plate which can freely turn over and swing, and a transmission belt is wound between the driving belt pulley and the driven belt pulley;
the rotating gear is coaxially sleeved outside the driving belt pulley and synchronously rotates with the driving belt pulley;
the first rack is arranged between the overturning station and the forming station, is correspondingly matched with the rotating gear, and drives the rotating nut to rotate so as to enable the rotating screw rod to extend towards the bottom of the forming cavity; and
and the second rack is arranged at the forming station and correspondingly matched with the rotating gear to drive the rotating nut to rotate reversely, so that the rotating screw rod is separated from the forming cavity.
As an improvement, the telescopic mechanism comprises:
the telescopic cylinder comprises a plurality of sections of bobbins which are connected end to end and sleeved in a sliding telescopic manner, the bobbin positioned at the top is fixedly connected with the turnover plate along the axial direction of the telescopic cylinder, the bobbin positioned at the bottom is fixedly connected with the rotary screw rod, and the telescopic cylinder is driven by the telescopic screw rod to be stretched and retracted synchronously; and
and the pressing plate is fixedly connected with the bobbin close to the second section of the turnover plate and is arranged in a shape of profiling with the cross section of the forming cavity.
The invention has the beneficial effects that:
(1) the forming device is matched with the first pressing device to form a compact bottom-layer stamp blank for engraving, then the stamp main body which is formed by an upper-layer graphite raw material mixture containing fluoride salt is pressed and formed by the second pressing device on the basis of the bottom-layer stamp blank, a material channel is formed in the stamp main body, then the fluoride salt is decomposed in the graphitization process, a pore channel is formed in the stamp main body, finally, resin particles are added into the material channel, and the resin particles are heated to form a protective layer on the surface layer of the graphite stamp blank along the pore channel, so that the resin is firmly adsorbed on the graphite stamp, and the separation of powdery particles on the graphite stamp is avoided;
(2) According to the invention, the plurality of stations are arranged on the turntable, so that the forming device on each station performs the forming work of the corresponding graphite seal, and the forming device is switched and connected tightly between each station, thus the degree of automation is high and the processing efficiency is high;
(3) according to the invention, through the rotation of the turntable and the arrangement of the lifting mechanism, the bottom plate is gradually lifted in the process of transferring the forming station to the discharging station, and the graphite stamp blank positioned in the forming cylinder is ejected out of the forming cylinder and then discharged;
(4) according to the invention, the turnover mechanism is controlled to start in the rotating process of the turntable, so that the rotating mechanism and the telescopic mechanism can automatically cover the top opening of the forming cylinder, and the rotating mechanism can be started to drive the telescopic mechanism to stretch and retract through the rotation of the turntable, so that the telescopic mechanism is inserted into the forming cylinder to form a material channel on a graphite stamp blank, and in the stretching process of the telescopic mechanism, the pressing plate synchronously presses downwards to extrude and form a graphite raw material mixture in the forming cylinder;
(5) the invention drives the telescopic mechanism to extend and retract through the rotating mechanism, so that in the process of pressing the pressing plate downwards, the pressing plate which is pressed downwards can be locked through the matching of the rotating screw rod and the rotating nut on the rotating mechanism, the pressing plate keeps the pressing force, and the pressure maintaining treatment is carried out on the graphite raw material mixture in the forming cylinder.
In conclusion, the invention has the advantages of regular blank of the formed graphite stamp, high forming speed, uniform resin protective layer on the surface, strong adhesive force and the like, and is particularly suitable for the technical field of processing of graphite stamps.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a first schematic diagram illustrating a top view structure of the present invention;
FIG. 3 is a schematic top view of the present invention;
FIG. 4 is a perspective view of a second rack of the present invention;
FIG. 5 is a schematic perspective view of a molding apparatus according to the present invention;
FIG. 6 is a schematic perspective view of a second pressing apparatus according to the present invention;
FIG. 7 is a partial schematic view of a second pressing apparatus according to the present invention;
FIG. 8 is a perspective view of the guiding plate of the present invention;
FIG. 9 is a schematic cross-sectional view of the molding apparatus of the present invention;
FIG. 10 is a third schematic top view of the present invention;
FIG. 11 is a schematic cross-sectional view of the telescoping mechanism of the present invention;
FIG. 12 is a schematic cross-sectional view of the bobbin of the present invention;
fig. 13 is a schematic perspective view of a first pressing device according to the present invention.
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 is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
The first embodiment is as follows:
As shown in fig. 1 to 6, a graphite stamp forming apparatus includes a first feeding bin 11 and a second feeding bin 12 disposed side by side, wherein the first feeding bin 11 stores a graphite raw material mixture after stirring and kneading, and the second feeding bin 12 stores a graphite raw material mixture containing fluoride salt after stirring and kneading;
the rotating disc 2 is rotatably arranged right below the first feeding bin 11 and the second feeding bin 12, and the first feeding bin 11 is positioned in front of the second feeding bin 12 along the rotating direction of the rotating disc 2;
the forming devices 3 are arranged on the turntable 2 at equal intervals along the circumference of the axis of the turntable 2, five groups of the forming devices 3 are arranged, each forming device comprises a bottom plate 31 and a forming cylinder 32, the forming cylinders 32 are fixedly arranged on the turntable 2 and synchronously rotate along with the turntable 2, the bottom plates 31 are arranged at the bottoms of the forming cylinders 32 and are combined with the forming cylinders 32 to form forming cavities 30;
the first pressing device 4 is arranged above the rotary table 2, is arranged between the first feeding bin 11 and the second feeding bin 12, and is used for extruding and pressing the graphite raw material mixture added into the forming cylinder 32 from the first feeding bin 11; and
The second pressing device 5 is arranged corresponding to the forming cylinder 32 one by one, and is installed at the opening at the top of the forming cylinder 32 correspondingly, and the second pressing device 5 rotates along with the rotating disc 2, and comprises a turnover mechanism 51, a rotating mechanism 52 and a telescopic mechanism 53, wherein the turnover mechanism 51 is hinged and installed at the opening at the top of the forming cylinder 32, the rotating mechanism 52 and the telescopic mechanism 53 are installed on the turnover mechanism 51, the rotating mechanism 52 drives the telescopic mechanism 53 to perform telescopic extrusion, and the graphite raw material mixture containing fluoride salt input by the second feeding bin 12 in the forming cylinder 32 is extruded and pressed, so that the top of the graphite stamp blank 10 formed in the forming cavity 30 forms a material channel 101 extending into the graphite stamp blank 10.
The rotary table 2 is sequentially provided with a first feeding station 21, a pressing station 22, a second feeding station 23, an overturning station 24, a forming station 25 and a discharging station 26 around the rotation direction of the rotary table, the first feeding station 21 is located under the first feeding bin 11, the pressing station 22 is located under the first pressing device 4, the second feeding station 23 is located under the second feeding bin 12, the overturning station 24 is located on the opposite side of the first feeding station 21, the forming station 25 is located on the opposite side of the pressing station 22, and the discharging station 26 is located on the opposite side of the second feeding station 23.
Further, when the forming device 3 is located at the first feeding station 21, the pressing station 22 and the second feeding station 23, the first feeding bin 11, the first pressing device 4 and the second feeding bin 12 are respectively used for completing the primary feeding, the primary pressing and the secondary feeding in turn, when the forming device 3 is located at the turning station 24, the turning mechanism 51 of the second pressing device 5 is started to turn the rotating mechanism 52 and the telescoping mechanism 53 over and cover the top opening of the forming cylinder 32, during the transfer of the forming device 3 from the turning station 24 to the forming station 25, the rotating mechanism 52 drives the telescoping mechanism 53 to insert into the molding cavity 30 for secondary pressing, during the transfer of the forming means 3 from the forming station 25 to the outfeed station 26, the bottom plate 31 is lifted to eject the graphite stamp blank 10 formed in the forming cavity 30.
It should be noted that, in the raw material pressing process of the graphite product, the following steps exist:
firstly, feeding once, wherein initially, the forming device 3 is positioned at a first feeding station 21 below a first feeding bin 11, the first feeding bin 11 is used for feeding a mixture of coke and a binder into a forming cavity 30, the mixture is obtained by stirring, mixing and kneading, the coke is petroleum coke, pitch coke, mesocarbon microbeads or metallurgical coke, the raw material of the coke needs to be pretreated, and the binder is coal pitch, petroleum pitch, artificial resin or sugar solution;
Step two, pressing once, namely rotating the turntable 2 after charging, driving the forming device 3 to transfer to a pressing station 22 and be positioned below the first pressing device 4, then pressing down the first pressing device 4, and extruding the raw materials in the forming cavity 30 to enable the raw materials to form a compact bottom layer seal blank for engraving;
step three, secondary feeding, after pressing is completed, the forming device 3 rotates to a second feeding station 23 along with the turntable 2, the second feeding bin 12 injects raw materials into the forming cavity 30 to cover the bottom layer stamp blank formed in the primary pressing step, and at the moment, fluoride salt is added to the injected raw materials on the basis of the raw materials in the first feeding bin 11, and the fluoride salt and the raw materials are uniformly distributed in the raw materials through stirring and kneading;
turning, namely rotating the turntable 2 after the charging is finished, driving the forming device 3 to be transferred to a turning station 24, starting a turning mechanism 51 arranged on the forming cylinder 32, and driving the rotating mechanism 52 and the telescopic mechanism 53 to turn over and cover the opening at the top of the forming cylinder 32;
step five, secondary pressing, after the turning is finished, rotating the turntable 2, and in the process of transferring the forming device 3 from the turning station 24 to the forming station 25, starting the rotation of the rotating mechanism 52 to drive the telescopic mechanism 53 to extend into the forming cylinder 32 and insert the telescopic mechanism 53 into the raw material in the forming cylinder 32 to form a material channel 101, and simultaneously, carrying out secondary extrusion on the raw material in the forming cylinder 32 synchronously by using a pressing plate 533 arranged on the telescopic mechanism 53 so as to form the raw material in the forming cylinder 32 into the graphite stamp blank 10;
Step six, discharging, after finishing the secondary pressing, rotating the turntable 2 to drive the forming device 3 to transfer from the forming station 25 to the discharging station 26, in the transferring process, starting the reverse rotation of the rotating mechanism 52 to drive the retracting mechanism 53 to retract, then starting the turnover mechanism 51 to drive the rotating mechanism 52 and the retracting mechanism 53 to turn over and reset, then starting the lifting mechanism 33 to drive the bottom plate 31 to lift upwards, lifting and outputting the graphite stamp blank 10 in the forming cylinder 32 from the forming cylinder 32, transferring the output graphite stamp blank 10 to a dipping chamber to carry out dipping, roasting and graphitization treatment, wherein the dipping and roasting treatment leads the graphite stamp blank at the bottom layer and the graphite stamp blank at the upper layer to be connected into a whole, and in the graphitization treatment process, fluoride salt particles in the graphite stamp blank main body are decomposed to form fluorine gas, and a large-diameter pore flow channel is formed in the graphite stamp blank main body, and injecting resin particles into the material channel 101, heating the graphite stamp blank to heat and melt the resin particles into liquid, and then centrifugally rotating the graphite stamp blank to enable the resin liquid in the material channel 101 to wrap the graphite stamp blank 10 in the pore channel formed by fluoride salt through the centrifugal rotation effect to form a resin protective layer.
As shown in fig. 9 and 10, in a preferred embodiment, the forming cavity 30 is square, and the bottom plate 31 is formed to be flush with the forming cavity 30.
As shown in fig. 9 and 10, further, a lifting mechanism 33 is disposed on the bottom plate 31, and the lifting mechanism 33 includes:
the screw rod 331 is vertically connected and arranged below the bottom plate 31;
a gear 332, wherein the gear 332 is rotatably mounted at the bottom of the forming cylinder 32;
the screw rod nut 333 is embedded in the central position of the gear 332 and correspondingly matched with the screw rod 331;
the lifting rack 334 is arranged between the forming station 25 and the discharging station 26, and is matched with the gear 332 to drive the screw rod nut 333 to rotate so as to lift the bottom plate 31;
and the descending rack 335 is arranged between the discharging station 26 and the first feeding station 21, and is matched with the gear 332 to drive the screw rod nut 333 to rotate reversely, so that the bottom plate 31 descends and resets.
It should be noted that, the bottom plate 31 is in the forming cavity 30, the circumferential degree of freedom is limited, during the process of transferring the forming device 3 from the forming station 25 to the discharging station 26, the lead screw nut 333 is rotated through the rotation cooperation of the gear 332 and the lifting rack 334, and the lead screw 331 is lifted to drive the bottom plate 31 to be lifted, and during the process of transferring the forming device 3 from the discharging station 26 to the first feeding station 21, the lead screw nut 333 is reversed through the rotation of the gear 332 and the descending rack 335, and the lead screw 331 is descended to return the bottom plate to the forming cylinder 32.
As shown in fig. 13, as a preferred embodiment, the first pressing device 4 includes:
the pressing air cylinder 41 is vertically arranged, and the pressing air cylinder 41 pushes downwards; and
and the pressing plate 42 is horizontally arranged on the pushing end of the pressing cylinder 41, and the cross section shape of the pressing plate 42 is in a shape of copying with the cross section shape of the forming cavity 30.
The graphite material injected into the molding cavity 30 from the first feed bin 11 is pressed by the first pressing device 4 to form a dense underlying graphite stamp blank.
As shown in fig. 6 to 8, as a preferred embodiment, the turnover mechanism 51 includes:
the turning plate 511, one end of the turning plate 511 in the length direction is hinged with the top of the forming tube 32, and the other end is freely turned and swung;
the connecting plate 512 is vertically arranged on the turnover plate 511, is close to the hinged end part of the turnover plate 511, and is provided with a kidney-shaped groove 513;
a roller 514, wherein the roller 514 is clamped in the kidney-shaped groove 513 and can freely rotate in the kidney-shaped groove 513;
a connecting arm 515, one end of the connecting arm 515 is rotatably connected with the roller 514;
A guide wheel 516, wherein the guide wheel 516 is horizontally and rotatably arranged at the other end part of the connecting arm 515 relative to the roller 514;
the guide disc 517 is coaxially and fixedly arranged above the rotary disc 2, a guide groove 518 for the guide wheel 516 to roll is arranged at the edge of the guide disc 517, and the guide groove 518 comprises a first arc-shaped section 5181 arranged between the discharging station 26 and the turning station 24 along the rotation direction of the rotary disc 2 and a second arc-shaped section 5182 arranged between the turning station 24 and the forming station 25; and
and the supporting arm 519 is installed on the turntable 2, and the top of the supporting arm 519 is sleeved with the connecting arm 515 in a sliding manner.
Further, an engaging groove 321 that engages with an end portion of the reversing plate 511 that can be reversed and swung is provided at the top of the molding tube 32.
As shown in fig. 7, further, the rotating mechanism 52 includes:
the rotating nut is rotatably arranged in the middle of the length direction of the turnover plate 511;
a rotary screw 522 vertically installed on the turning plate 511, which is correspondingly matched with the rotary nut, and which is installed at the end of the telescoping mechanism 53 and fixedly connected with the telescoping mechanism 53;
The driven belt pulley 523 is coaxially sleeved outside the rotating nut, and the driven belt pulley 523 and the rotating nut rotate synchronously;
the driving pulley 524 is rotatably mounted at the end part of the overturning plate 511, which can freely overturn and swing, and a transmission belt 525 is wound between the driving pulley 524 and the driven pulley 523;
the rotating gear 526 is coaxially sleeved outside the driving pulley 524 and rotates synchronously with the driving pulley 524;
a first rack 527, which is disposed between the turning station 24 and the forming station 25, and which is correspondingly engaged with the rotating gear 526 to drive the rotating nut to rotate, so that the rotating screw 522 extends toward the bottom of the forming chamber 30; and
and the second rack 528 is arranged at the forming station 25, and is correspondingly matched with the rotating gear 526 to drive the rotating nut to rotate reversely, so that the rotating screw rod 522 is separated from the forming cavity 30.
As shown in fig. 9, 11 and 12, the telescopic mechanism 53 further includes:
the telescopic cylinder 531 comprises a plurality of sections of bobbins 532 which are connected end to end and sleeved in a sliding telescopic manner, the bobbins 532 positioned at the top are fixedly connected with the turnover plate 511 along the axial direction of the telescopic cylinder 531, the bobbins 532 positioned at the bottom are fixedly connected with the rotary lead screw 522, the rotary lead screw 522 stretches and retracts to drive the telescopic cylinder 531 to stretch and retract synchronously, and the bobbins 532 are mutually limited and connected with each other through limiting bosses 5321 and limiting rings 5322 respectively arranged at the top and the bottom so as to avoid separation; and
And the pressing plate 533 is fixedly connected with the bobbin 532 close to the second section of the turnover plate 511, and is arranged in a profiling manner with the cross section of the molding cavity 30.
It should be noted that, the turnover mechanism 51 is matched with the guide wheel 516 through the guide slot 518 on the guide disc 517, and adjusts the horizontal extension and contraction of the connecting arm 515, and on the first arc-shaped segment 5181, the connecting arm 515 is close to the central point of the turntable 2, and pulls the turnover plate 511, so that the turnover plate 511 is inclined, so that the opening at the top of the forming cylinder 32 is open, and on the second arc-shaped segment 5182, the connecting arm 515 is far away from the central point of the turntable 2, and pulls the turnover plate 511 to turn. The flipping panel 511 is laid over the top opening of the forming tube 32.
It is further described that, between the turning station 24 and the forming station 25, the rotating gear 526 is engaged with the first rack 527 to drive the driving pulley 524 to rotate, the rotating nut is rotated through the allocation of the driving belt 525 and the driven pulley 523, the rotating screw 522 is driven to extend into the forming cylinder 32 to further drive the telescopic cylinder 531 to extend and insert into the graphite material in the forming cylinder 32 to form the material passage 101, and in the process of extending the telescopic cylinder 531, the pressing plate 533 presses down the graphite material in the forming cylinder 32 for secondary extrusion pressing, and in the process of engaging the rotating gear 526 with the second rack 528, the rotating mechanism 52 is reversed to drive the telescopic cylinder 531 to retract and reset, and after the telescopic cylinder 531 resets, the turning mechanism 51 is turned over again to turn over the rotating mechanism 52 and the telescopic mechanism 53 to reset.
It should be emphasized here that the tilting mechanism 51, the rotating mechanism 52 and the telescoping mechanism 53 all have completed the return operation before the bottom plate 31 is lifted.
In addition, after the pressing plate 533 presses the graphite material in the molding cavity 30, the top end of the graphite stamp blank 10 in the molding cavity 30 is just below the bobbin 532 at the top of the telescopic cylinder 531, and after the telescopic cylinder 531 contracts, the telescopic cylinder 531 just separates from the graphite stamp blank 10.
The working process is as follows:
firstly, feeding once, wherein initially, the forming device 3 is positioned at a first feeding station 21 below a first feeding bin 11, the first feeding bin 11 is used for feeding a mixture of coke and a binder into a forming cavity 30, the mixture is obtained by stirring, mixing and kneading, the coke is petroleum coke, pitch coke, mesocarbon microbeads or metallurgical coke, the raw material of the coke needs to be pretreated, and the binder is coal pitch, petroleum pitch, artificial resin or sugar solution;
step two, pressing once, namely rotating the turntable 2 after charging, driving the forming device 3 to transfer to a pressing station 22 and be positioned below the first pressing device 4, then pressing down the first pressing device 4, and extruding the raw materials in the forming cavity 30 to enable the raw materials to form a compact bottom layer seal blank for engraving;
Step three, secondary feeding, after pressing is completed, the forming device 3 rotates to a second feeding station 23 along with the turntable 2, the second feeding bin 12 injects raw materials into the forming cavity 30 to cover the bottom layer stamp blank formed in the primary pressing step, and at the moment, fluoride salt is added to the injected raw materials on the basis of the raw materials in the first feeding bin 11, and the fluoride salt and the raw materials are uniformly distributed in the raw materials through stirring and kneading;
turning, namely rotating the turntable 2 after the charging is finished, driving the forming device 3 to be transferred to a turning station 24, starting a turning mechanism 51 arranged on the forming cylinder 32, and driving the rotating mechanism 52 and the telescopic mechanism 53 to turn over and cover the opening at the top of the forming cylinder 32;
step five, secondary pressing, after the turning is finished, rotating the turntable 2, and in the process of transferring the forming device 3 from the turning station 24 to the forming station 25, starting the rotation of the rotating mechanism 52 to drive the telescopic mechanism 53 to extend into the forming cylinder 32 and insert the telescopic mechanism 53 into the raw material in the forming cylinder 32 to form a material channel 101, and simultaneously, carrying out secondary extrusion on the raw material in the forming cylinder 32 synchronously by using a pressing plate 533 arranged on the telescopic mechanism 53 so as to form the raw material in the forming cylinder 32 into the graphite stamp blank 10;
Step six, discharging, after finishing the secondary pressing, rotating the turntable 2 to drive the forming device 3 to transfer from the forming station 25 to the discharging station 26, in the transferring process, starting the reverse rotation of the rotating mechanism 52 to drive the retracting mechanism 53 to retract, then starting the turnover mechanism 51 to drive the rotating mechanism 52 and the retracting mechanism 53 to turn over and reset, then starting the lifting mechanism 33 to drive the bottom plate 31 to lift upwards, lifting and outputting the graphite stamp blank 10 in the forming cylinder 32 from the forming cylinder 32, transferring the output graphite stamp blank 10 to a dipping chamber to carry out dipping, roasting and graphitization treatment, wherein the dipping and roasting treatment leads the graphite stamp blank at the bottom layer and the graphite stamp blank at the upper layer to be connected into a whole, and in the graphitization treatment process, fluoride salt particles in the graphite stamp blank main body are decomposed to form fluorine gas, and a large-diameter pore flow channel is formed in the graphite stamp blank main body, and injecting resin particles into the material channel 101, heating the graphite stamp blank to heat and melt the resin particles into liquid, and then centrifugally rotating the graphite stamp blank to enable the resin liquid in the material channel 101 to wrap the graphite stamp blank 10 in the pore channel formed by fluoride salt through the centrifugal rotation effect to form a resin protective layer.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (5)
1. The graphite stamp forming device comprises a first feeding bin (11) and a second feeding bin (12) which are arranged side by side, and is characterized in that a graphite raw material mixture after stirring and kneading is stored in the first feeding bin (11), and a graphite raw material mixture containing fluoride salt after stirring and kneading is stored in the second feeding bin (12);
the rotary table (2) is rotatably arranged right below the first feeding bin (11) and the second feeding bin (12), and the first feeding bin (11) is positioned in front of the second feeding bin (12) along the rotating direction of the rotary table (2);
the forming device (3) is arranged on the rotary table (2) at equal intervals along the axis circumference of the rotary table (2) and comprises five groups, the forming device (3) comprises a bottom plate (31) and a forming cylinder (32), the forming cylinder (32) is fixedly arranged on the rotary table (2) and synchronously rotates along with the rotary table (2), the bottom plate (31) is arranged at the bottom of the forming cylinder (32) and is combined with the forming cylinder (32) to form a forming cavity (30);
The first pressing device (4) is arranged above the rotary table (2), arranged between the first feeding bin (11) and the second feeding bin (12) and used for extruding and pressing the graphite raw material mixture added into the forming barrel (32) from the first feeding bin (11); and
second pressing devices (5), wherein the second pressing devices (5) are arranged in one-to-one correspondence with the forming cylinders (32), which is arranged at the top opening of the corresponding forming cylinder (32) and rotates along with the turntable (2), and comprises a turnover mechanism (51), a rotating mechanism (52) and a telescopic mechanism (53), the turnover mechanism (51) is hinged and arranged at the opening at the top of the forming cylinder (32), the rotating mechanism (52) and the telescopic mechanism (53) are both arranged on the turnover mechanism (51), the rotating mechanism (52) drives the telescopic mechanism (53) to perform telescopic extrusion, extruding and pressing the graphite raw material mixture containing fluoride salt input from the second feeding bin (12) in the forming cylinder (32) to form a material channel (101) extending into the graphite stamp blank (10) at the top of the graphite stamp blank (10) formed in the forming cavity (30);
A first feeding station (21), a pressing station (22), a second feeding station (23), a turning station (24), a forming station (25) and a discharging station (26) are sequentially arranged on the rotary table (2) along the rotation direction of the rotary table, the first feeding station (21) is positioned under the first feeding bin (11), the pressing station (22) is positioned under the first pressing device (4), the second feeding station (23) is positioned under the second feeding bin (12), the turning station (24) is positioned on the opposite side of the first feeding station (21), the forming station (25) is positioned on the opposite side of the pressing station (22), and the discharging station (26) is positioned on the opposite side of the second feeding station (23);
when the forming device (3) is positioned at the first feeding station (21), the pressing station (22) and the second feeding station (23), the first feeding bin (11), the first pressing device (4) and the second feeding bin (12) sequentially complete one-time feeding, one-time pressing and two-time feeding work respectively, when the forming device (3) is positioned at the overturning station (24), the overturning mechanism (51) of the second pressing device (5) is started to enable the rotating mechanism (52) and the telescopic mechanism (53) to overturn and cover the top opening of the forming cylinder (32), the forming device (3) is transferred to the forming station (25) from the overturning station (24), the rotating mechanism (52) drives the telescopic mechanism (53) to be inserted into the forming cavity (30) for two-time pressing, and the forming device (3) is transferred to the discharging station (26) from the forming station (25), the bottom plate (31) is lifted to eject the graphite stamp blank (10) formed in the forming cavity (30);
The turnover mechanism (51) comprises a turnover plate (511), a connecting plate (512), a roller (514), a connecting arm (515), a guide wheel (516), a guide disc (517) and a supporting arm (519), one end of the turnover plate (511) in the length direction is hinged with the top of the forming cylinder (32), the other end of the turnover plate is freely turned over and swung, the connecting plate (512) is vertically arranged on the turnover plate (511) and is close to the hinged end part of the turnover plate (511), a waist-shaped groove (513) is arranged on the connecting plate, the roller (514) is clamped in the waist-shaped groove (513) and freely rotates in the waist-shaped groove (513), one end of the connecting arm (515) is rotatably connected with the roller (514), the guide wheel (516) is horizontally rotatably arranged at the other end part of the connecting arm (515) relative to the roller (514), and the guide disc (517) is coaxially and fixedly arranged above the turntable (2), a guide groove (518) for the guide wheel (516) to roll is formed in the edge of the support arm, the guide groove (518) comprises a first arc-shaped section (5181) arranged between the discharging station (26) and the overturning station (24) and a second arc-shaped section (5182) arranged between the overturning station (24) and the forming station (25) along the rotation direction of the turntable (2), the support arm (519) is installed on the turntable (2), and the top of the support arm is slidably sleeved with the connecting arm (515);
The rotating mechanism (52) comprises a rotating nut, a rotating screw rod (522), a driven pulley (523), a driving pulley (524), a rotating gear (526), a first rack (527) and a second rack (528), the rotating nut is rotatably installed in the middle of the length direction of the turnover plate (511), the rotating screw rod (522) is vertically installed on the turnover plate (511), is correspondingly matched with the rotating nut and is arranged at the end part of the telescopic mechanism (53) and fixedly connected with the telescopic mechanism (53), the driven pulley (523) is coaxially sleeved outside the rotating nut and synchronously rotates with the rotating nut, the first rack (527) is arranged between the turnover station (24) and the forming station (25) and is correspondingly matched with the rotating gear (526) to drive the rotating nut to rotate, the rotary screw rod (522) is extended towards the bottom of the forming cavity (30), the second rack (528) is arranged at the forming station (25) and is correspondingly matched with the rotary gear (526), and the rotary nut is driven to rotate reversely, so that the rotary screw rod (522) is separated from the forming cavity (30);
Telescopic machanism (53) are including telescopic tube (531) and clamp plate (533), telescopic tube (531) are including linking up end to end, and slide a plurality of sections bobbin (532) that telescopic sleeve established, along the axial direction of this telescopic tube (531), are located the top bobbin (532) with returning face plate (511) fixed connection, be located the bottom bobbin (532) with rotatory lead screw (522) fixed connection, rotatory lead screw (522) are flexible to be driven telescopic tube (531) are flexible in step, clamp plate (533) with be close to the second section of returning face plate (511) bobbin (532) fixed connection, its with the cross-section profile modeling setting of shaping chamber (30) is personally submitted.
2. A graphite stamp forming apparatus according to claim 1, wherein said forming cavity (30) is square shaped, and said bottom plate (31) is contoured to said forming cavity (30).
3. The graphite stamp forming apparatus according to claim 1, wherein a lifting mechanism (33) is disposed on the base plate (31), the lifting mechanism (33) comprising:
the screw rod (331), the said screw rod (331) connects and sets up in the said bottom plate (31) vertically;
A gear (332), wherein the gear (332) is rotatably arranged at the bottom of the forming cylinder (32);
the screw rod nut (333), the said screw rod nut (333) is embedded in the central position of the said gear (332), it cooperates with said feed screw (331) correspondingly;
the lifting rack (334) is arranged between the forming station (25) and the discharging station (26), and is matched with the gear (332) to drive the screw rod nut (333) to rotate so as to lift the bottom plate (31);
and the descending rack (335) is arranged between the discharging station (26) and the first feeding station (21) and is matched with the gear (332) to drive the screw rod nut (333) to rotate reversely, so that the bottom plate (31) descends and resets.
4. A graphite stamp forming apparatus according to claim 1, wherein said first pressing means (4) comprises:
the pressing air cylinder (41), the pressing air cylinder (41) is vertically arranged and is pushed downwards; and
the pressing plate (42) is horizontally arranged on the pushing end of the pressing cylinder (41), and the cross section of the pressing plate (42) is in profiling arrangement with that of the forming cavity (30).
5. The graphite stamp molding apparatus according to claim 1, wherein a locking groove (321) for locking an end of the turnover plate (511) which can freely turn over and swing is provided at a top of the molding cylinder (32).
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|---|---|---|---|
| CN202011065316.0A CN112248615B (en) | 2020-09-30 | 2020-09-30 | Graphite seal forming device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011065316.0A CN112248615B (en) | 2020-09-30 | 2020-09-30 | Graphite seal forming device |
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| CN112248615B true CN112248615B (en) | 2021-09-28 |
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| CN110435202A (en) * | 2019-09-05 | 2019-11-12 | 宜昌精密石墨新材料有限公司 | A kind of high-efficiency automatic equipment producing highly difficult high-precision graphite packing |
| CN111688257A (en) * | 2020-05-07 | 2020-09-22 | 无锡宝亿沣密封材料有限公司 | Molding process and device of graphite packing ring |
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| JPS5858141A (en) * | 1981-09-30 | 1983-04-06 | Fukubi Kagaku Kogyo Kk | Apparatus for molding flexible graphite particle |
| CN202293382U (en) * | 2011-09-26 | 2012-07-04 | 南通锻压设备股份有限公司 | Side-pressing-type powder forming press |
| CN204367450U (en) * | 2014-11-28 | 2015-06-03 | 泰州航宇电碳制品有限公司 | Graphite electrical carbon Forming press machine |
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| CN112248615A (en) | 2021-01-22 |
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