CN112549623B

CN112549623B - Two-group powder continuous forming production line for single crystal furnace production and method thereof

Info

Publication number: CN112549623B
Application number: CN202011136550.8A
Authority: CN
Inventors: 徐建其; 刘涛; 黄岱; 李贺
Original assignee: Sinosteel New Materials Co Ltd
Current assignee: Symantec Advanced Materials Co ltd
Priority date: 2020-10-22
Filing date: 2020-10-22
Publication date: 2022-07-15
Anticipated expiration: 2040-10-22
Also published as: CN112549623A

Abstract

The invention provides a continuous molding production line and a continuous molding production method for two groups of powder for single crystal furnace production, wherein the production line comprises a conveying belt, a rotary chain device arranged on one side above the conveying belt, a molding device, a track assembly and a powder adding device; the method comprises a die cavity feeding procedure, a die entering procedure, a feeding procedure, a lower layer powder compacting procedure, an upper layer powder compacting procedure and a demoulding procedure. The inner die is filled with slightly poor powder and tamped when the inner die is removed, so that the external high-quality powder is tamped and positioned by the slightly poor powder in time to prevent collapse.

Description

Two-group powder continuous forming production line for single crystal furnace production and method thereof

Technical Field

The invention relates to the field of single crystal production equipment, in particular to a continuous forming production line and a continuous forming production method for two groups of powder for single crystal furnace production.

Background

The single crystal furnace is a device for melting polycrystalline materials such as polycrystalline silicon and the like by using a graphite heater in an inert gas (mainly nitrogen and helium) environment and growing dislocation-free single crystals by using a Czochralski method. In the existing single crystal furnace thermal field, the material performance required by the whole thermal field at each position is different.

The manufacturing method of the single crystal furnace comprises the following steps: the entire thermal field material is fabricated from a single piece or multiple pieces of graphite material. However, if the crucible is made of a single piece of material, the crucible can only be designed by the highest standard of the three-piece crucible in the whole thermal field, and the material performance at other positions is excessive; if a plurality of pieces of material are used, the number of pieces to be produced increases, and therefore the production cost also increases.

Disclosure of Invention

In view of the above problems, one of the objectives of the present invention is to provide a continuous molding production line for two sets of powders for single crystal furnace production, which utilizes a mold-entering mechanism to extend into a mold cavity for positioning, first fills the gap between an inner mold and the mold cavity with high quality powder and compacts the powder, then the mold-entering mechanism fills the inner mold with slightly poor quality powder and compacts the powder while removing the mold cavity, and simultaneously utilizes a rotary chain device with multiple sets of molding devices to perform automatic and efficient molding operation, thereby solving the problem of excessive material waste cost caused by processing thermal field materials with single or multiple graphite materials in the background art.

In order to achieve the purpose, the invention provides the following technical scheme:

the utility model provides a single crystal growing furnace production is with two sets of powder continuous type shaping production lines, includes the conveyer belt, sets up in the gyration chain device of this conveyer belt top one side, its characterized in that still includes:

the forming device comprises a plurality of brackets fixedly arranged on the rotary chain device, mold feeding mechanisms which are restrained on the brackets in a one-to-one correspondence manner and can only move along the vertical direction, and mold cavities matched with the mold feeding mechanisms, wherein the mold cavities are arranged on a conveying belt right below the mold feeding mechanisms;

the mold entering mechanism comprises a core mold assembly, a first pressing assembly, a second pressing assembly, an inner mold assembly and a mold entering frame, the core mold assembly is arranged below the mold entering frame, the first pressing assembly and the second pressing assembly are sleeved on the outer side of the core mold assembly, and the first pressing assembly and the second pressing assembly press powder on the outer side of the core mold assembly to be dense;

the track assembly is arranged around the outer ring of the rotary chain device and comprises a first track unit and a second track unit, the first track unit drives the die-entering frame to vertically move, and the second track unit drives the inner die assembly to vertically move; and

the powder adds the device, this powder add the device set up in the inside top of gyration chain device, it includes that first powder adds storehouse, second powder and adds storehouse and feed unit, first powder adds the storehouse and passes through the hose one-to-one intercommunication the die cavity inside wall, feed unit one-to-one set up in cross powder passageway top, and it passes through the hose intercommunication the second powder adds the storehouse.

As an improvement, the core mold assembly comprises a rotating rod and a core mold rigidly connected to the bottom of the rotating rod, and the rotating rod is freely and rotatably connected to the mold frame; the first pressing assembly comprises a rotary table, a presser foot and a top cover, the rotary table is sleeved on the rotary rod and freely slides relative to the rotary rod, the presser foot is arranged at the bottom of the rotary table and penetrates through the core mold and slides relative to the core mold, the top cover is coated on the outer side of the rotary table, a transmission assembly is arranged between the rotary table and the mold inserting frame and is in transmission connection with the core mold assembly, a jacking unit is arranged on the core mold assembly and jacks the presser foot to press downwards, an elastic piece is arranged between the rotary table and the core mold and is connected with the rotary table, and the inner mold assembly can be matched with and abutted against the top cover; the second pressing assembly comprises a rotating piece sleeved on the core mold and a plurality of pressing rollers arranged on the circumference of the bottom of the rotating piece, and the pressing rollers are connected with the rotating piece through elastic reset; the inner die assembly comprises an inner die and an inner die frame integrally connected with the inner die, and the side wall of the inner cavity of the inner die is provided with a powder passage and a leaning platform which can be matched and abutted against the rotating piece.

As an improvement, the shape of the presser foot is matched with that of the core mold, and when the elastic piece is bounced to be reset, the presser foot is contracted into the core mold and forms a complete core mold model together with the core mold.

As an improvement, the turntable comprises a rotary drum and a toothed ring coaxially sleeved on the outer side of the rotary drum, the rotary drum is arranged in a sliding manner relative to the toothed ring along the axial direction, grooves are formed in the circumference of the rotary drum along the axial direction of the rotary drum in the same direction, and convex blocks matched with the grooves are arranged on the inner ring of the toothed ring.

As an improvement, the presser feet are hinged at the bottom of the rotary drum and are uniformly distributed along the circumference of the rotary drum at equal intervals.

As an improvement, the jacking unit comprises a first protrusion arranged on the top cover and a second protrusion arranged on the rotary drum, when the rotary drum rotates, the first protrusion butts against the second protrusion to jack the second protrusion, so that the pressure foot is driven to do rotary motion and press the powder material discontinuously.

As an improvement, the core mold is provided with a track boss which is arranged at the top of the core mold and protrudes out of the circumferential surface of the core mold; the inner cavity of the rotating piece is provided with a spiral track which is clamped and coated on the track boss and slides relative to the track boss, and the rotating piece moves circumferentially relative to the core mold along the axial direction.

As an improvement, drive assembly includes first gear, second gear, transmission shaft and spur rack, first gear and second gear set up respectively in the both ends of transmission shaft, first gear with the ring gear meshing sets up, the transmission shaft is followed the length direction who goes into the die carrier slides, the spur rack is fixed set up in go into on the die carrier, the second gear with the spur rack meshing of can cooperating.

As a refinement, the dosing unit comprises:

the feeding bin is fixedly arranged on the inner die, and an opening is formed in the bottom of the feeding bin;

the discharging wheel is matched with the feeding bin in a rotating mode and is arranged at the opening at the bottom of the feeding bin; and

the ratchet wheel is in transmission connection with the discharging wheel and the rotary table and is in meshing transmission with the straight rack.

The invention also aims to provide a continuous forming production method of two groups of powder for single crystal furnace production, which solves the problem of easy collapse in the combined compression forming of the two powder materials by utilizing the automatic production of an upper mold cavity process, a mold entering process, a material feeding process, a lower layer powder material compacting process, an upper layer powder material compacting process and a demolding process, replaces manual operation and improves the efficiency.

A continuous forming production method of two groups of powder for single crystal furnace production is characterized by comprising the following steps:

step one, a mold cavity forming process, wherein mold cavities are sequentially placed on a conveying belt at equal intervals, and the conveying belt drives a plurality of mold cavities to move forwards;

step two, in the mold entering process, the first track unit and the second track unit jointly drive the core mold assembly and the inner mold assembly of the mold entering mechanism to move downwards to enable the core mold assembly to reach a set height relative to the mold cavity, and at the moment, the second track unit continuously drives the inner mold assembly to move downwards until the bottom of the inner mold is attached to the bottom of the mold cavity;

step three, a feeding process, namely after the mold entering in the step two is finished, filling a cavity between the mold cavity and the inner mold with high-quality powder material by the first powder material adding bin to fill the cavity, driving the inner mold assembly to ascend by the second track unit, and gradually filling a cavity between the inner mold and the core mold with slightly poor powder material by the second powder material adding bin through the feeding unit;

step four, a lower layer powder compaction procedure, in the step three, the inner mold assembly moves upwards, the core mold assembly maintains the relative position with the mold cavity, the elastic part resets to enable the first pressing assembly to ascend, the transmission assembly transmits the rotary table to rotate, the presser foot hinged on the rotary table can do circular motion while ascending, and slightly inferior powder flowing below the presser foot is pressed and compacted until the presser foot is completely retracted into the core mold;

step five, an upper layer powder compaction process, after the step four, the inner mold assembly continues to rise, a leaning platform at the bottom of the inner mold props against the rotating piece to move, a spiral track arranged on the rotating piece is matched with a track boss arranged on the core mold, so that the rotating piece rotates and rises, and a press roller performs rolling pressing on slightly inferior powder flowing out of the inner mold;

and step six, a demolding procedure, wherein after the step five, the first track unit drives the core mold assembly to ascend until the mold entering mechanism is completely separated from the mold cavity, and the mold entering mechanism rotates along with the track assembly to be used.

The system of the invention has the advantages that:

(1) according to the invention, the mold entering mechanism is used for extending into the mold cavity for positioning, the high-quality powder is filled in the gap between the inner mold and the mold cavity and compacted, then the mold entering mechanism is used for filling slightly poor powder and compacting the inner mold while the inner mold is removed, so that the high-quality powder outside the inner mold is compacted and positioned by the slightly poor powder in time when the inner mold is removed, and collapse is prevented;

(2) according to the invention, when the die cavity is removed by using the die entering mechanism, the rotary table drives the presser foot to do circular motion, so that the presser foot is beneficial to pressing and tamping all powder around;

(3) according to the invention, the jacking bulge is utilized to jack the rotary table in the vertical direction, so that the pressure foot can effectively beat and press powder materials, the gap between the powder materials is eliminated, and the powder materials are better and more compact;

(4) according to the invention, the track boss is matched with the spiral track, so that the rotating piece rotates when driven by the inner die to ascend, the structure is simple, and additional power is not required to be added;

(5) according to the invention, the powder is rolled by the compression roller with elastic reset arranged on the circumference of the bottom of the rotating part, so that the powder on the top is further tamped;

(6) the invention realizes quantitative feeding to the inner cavity of the inner die by using the feeding unit, so that the dosing is more accurate and the consistency of the product is improved.

In conclusion, the invention has the advantages of simple structure, mold stripping tamping, convenience for extracting the inner mold and the like, and is particularly suitable for the field of single crystal production equipment.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a second schematic perspective view of the present invention;

FIG. 3 is an enlarged view of the point A in FIG. 2;

FIG. 4 is a schematic view of a molding apparatus of the present invention;

FIG. 5 is a schematic cross-sectional view taken along line B-B of FIG. 4;

FIG. 6 is an enlarged view of the point C in FIG. 4;

FIG. 7 is an enlarged view of FIG. 5 at D;

fig. 8 is a schematic view showing the movement of the core mold according to the present invention;

FIG. 9 is a schematic view of the top cover and turntable assembly of the present invention;

fig. 10 is a schematic view of a core mold structure of the present invention;

FIG. 11 is a schematic view of a rotating member according to the present invention;

FIG. 12 is a schematic view of the structure of a feeding unit of the present invention;

FIG. 13 is a schematic cross-sectional view of a feed unit of the present invention;

FIG. 14 is a schematic view of the turntable and presser foot arrangement of the present invention;

FIG. 15 is a schematic view of a ring gear structure according to the present invention;

FIG. 16 is a schematic process flow diagram of 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 to implicitly indicate 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.

Example 1:

as shown in fig. 1 to 4, a continuous molding production line for two sets of powders for single crystal furnace production comprises a conveyor belt 1, a rotary chain device 2 arranged on one side above the conveyor belt 1, and further comprises:

the forming device 3 comprises a plurality of supports 31 fixedly arranged on the rotating chain device 2, mold feeding mechanisms 32 which are constrained on the supports 31 and can only move along the vertical direction in a one-to-one correspondence manner, and mold cavities 33 matched with the mold feeding mechanisms 32, wherein the mold cavities 33 are arranged on the conveying belt 1 right below the mold feeding mechanisms 32;

the mold inserting mechanism 32 comprises a core mold component 321, a first pressing component 322, a second pressing component 323, an inner mold component 324 and a mold inserting frame 325, wherein the core mold component 321 is arranged below the mold inserting frame 325, the first pressing component 322 and the second pressing component 323 are sleeved outside the core mold component 321, and the first pressing component 322 and the second pressing component 323 press the powder outside the core mold component 321 to be dense;

the track assembly 4 is arranged around the outer ring of the rotating chain device 2 and comprises a first track unit 41 and a second track unit 42, the first track unit 41 drives the die entering frame 325 to vertically move, and the second track unit 42 drives the inner die assembly 324 to vertically move; and

powder adds device 5, this powder adds device 5 set up in the inside top of gyration chain device 2, and it includes first powder adds storehouse 51, second powder adds storehouse 52 and feed unit 53, first powder adds storehouse 51 and communicates through the hose one-to-one the die cavity 33 inside wall, feed unit 53 one-to-one set up in cross powder passageway 32411 top, and it communicates through the hose second powder adds storehouse 52.

It should be noted that the first track unit 41 and the second track unit 42 are provided with an ejection station for simultaneously driving the core mold assembly 321 and the inner mold assembly 324 to move downward, and the core mold assembly 321 and the inner mold assembly 324 are ejected into the mold cavity 33 at the ejection station; when the mold is removed, the second track unit 42 drives the inner mold assembly 324 to move upward, and then the first track unit 41 and the second track unit 42 simultaneously drive the core mold assembly 321 and the inner mold assembly 324 to move upward and remove from the mold cavity 33.

It should be noted that the powder adding device 5 and the rotary chain device 2 rotate synchronously in the same direction to discharge, and the powder is output after the mold feeding mechanism 32 enters the mold cavity 33 and is spliced under the electric control, and the powder is cut off under the control after the addition of the high-quality powder.

As shown in fig. 3 to 5, further, the core mold assembly 321 includes a rotating rod 3211 and a core mold 3212 rigidly connected to the bottom of the rotating rod 3211, and the rotating rod 3211 is freely rotatably connected to the mold frame 325; the first pressing component 322 includes a rotary table 3221 sleeved on the rotating rod 3211 and freely sliding with respect to the rotating rod 3211, a presser foot 3222 and a top cover 3223 arranged at the bottom of the rotary table 3221, the presser foot 3222 penetrates through the core mold 3212 and slides with respect to the core mold 3212, the top cover 3223 is covered on the outer side of the rotary table 3221, a transmission component 6 is arranged between the rotary table 3221 and the mold inserting frame 325 and is in transmission connection, a jacking unit 3224 is arranged on the core mold component 321 and jacks the presser foot 3222 to press down, an elastic component 35 is arranged between the rotary table 3221 and the core mold 3212 and is connected, and the inner mold component 324 can cooperatively abut against the top cover 3223; the second pressing assembly 323 includes a rotating member 3231 sleeved on the core mold 3212 and a plurality of pressing rollers 3232 disposed on the bottom circumference of the rotating member 3231, wherein the pressing rollers 3232 and the rotating member 3231 are elastically restored and connected; the inner mold assembly 324 comprises an inner mold 3241 and an inner mold frame 3242 integrally connected with the inner mold 3241, wherein a powder passing channel 32411 and a support 32412 capable of being matched and abutted against the rotating element 3231 are arranged on the side wall of an inner cavity of the inner mold 3241.

It should be noted that, after the mold-entering mechanism 32 enters the mold cavity 33, the powder adding device 5 fills the cavity between the mold cavity 33 and the inner mold 3241 with high-quality powder, and drives the mold-entering mechanism 32 to move in the reverse direction after the powder is filled, so as to drive the inner mold 3241 to relatively separate from the mold cavity 33.

It should be noted that the restoring force of the elastic member 35 is sufficient to drive the rotary table 3221 to ascend and return.

As shown in fig. 5, further, the outer shape of the presser foot 3222 matches the outer shape of the core mold 3212, and when the elastic member 35 is elastically released and reset, the presser foot 3222 is contracted into the core mold 3212 to form a complete core mold with the core mold 3212.

Further, the rotary table 3221 includes a rotary drum 32211 and a toothed ring 32212 coaxially sleeved outside the rotary drum 32211, the rotary drum 32211 is disposed in an axial direction to slide relative to the toothed ring 32212, a groove 322111 is disposed on a circumference of the rotary drum 32211 in the same direction along an axial direction thereof, and a protrusion 322121 disposed on an inner ring of the toothed ring 32212 and matching with the groove 322111 is disposed.

As shown in fig. 8 and 14, further, the presser foot 3222 is hinged to the bottom of the drum 32211, and is equally spaced along the circumference of the drum 32211.

It should be noted that, when the mold feeding mechanism 32 is taken out of the mold cavity 33, the turntable 3221 drives the presser foot 3222 to perform a circular motion, which is beneficial for the presser foot 3222 to press and tamp all the powder around, and the arrangement of the plurality of presser feet 3222 can make the pressed powder more uniform, and eliminate the phenomenon of seam bulging.

As shown in fig. 9, the pushing unit 3224 further includes a first protrusion 32241 disposed on the top cover 3223 and a second protrusion 32242 disposed on the rotary drum 32211, when the rotary drum 32211 rotates, the first protrusion 32241 pushes against the second protrusion 32242, so as to drive the pressing foot 3222 to intermittently press down the powder while making a rotary motion.

It should be noted that, through the transmission of the pushing unit 3224, the presser foot 3222 effectively beats and presses the powder, so as to eliminate the gap between the powder and make the powder more compact.

As shown in fig. 5, 7, 10 and 11, further, the core mold 3212 is provided with a trajectory projection 32121, the trajectory projection 32121 is provided on the top of the core mold 3212, and it is provided to protrude from the circumferential surface of the core mold 3212; a spiral track 32311 is provided in an inner cavity of the rotary member 3231, the spiral track 32311 engages and covers the track boss 32121 and slides with respect to the track boss 32121, and the rotary member 3231 moves in an axial direction and in a circular motion with respect to the core 3212.

As shown in fig. 4, 8 and 9, further, the transmission assembly 6 includes a first gear 61, a second gear 62, a transmission shaft 63 and a spur rack 64, the first gear 61 and the second gear 62 are respectively disposed at two ends of the transmission shaft 63, the first gear 61 is engaged with the toothed ring 32212, the transmission shaft 63 slides along the length direction of the mold feeding frame 325, the spur rack 64 is fixedly disposed on the mold feeding frame 325, and the second gear 62 is engaged with the spur rack 64.

As shown in fig. 8, 12 and 13, further, the feeding unit 53 includes:

the feeding bin 531 is fixedly arranged on the inner die 3241, and an opening is formed in the bottom of the feeding bin 531;

the discharging wheel 532 is matched with the feeding bin 531 in a rotating mode, and is arranged at the bottom opening of the feeding bin 531; and

the ratchet wheel 533 is in transmission connection with the discharging wheel 532 and the rotary table 3221, and the ratchet wheel 533 is in meshing transmission with the spur rack 64.

It should be noted that, the ratchet wheel 533 is arranged so that the discharging wheel 532 is not driven to rotate for discharging in the descending process of the inner mold 3241, and the discharging wheel 532 is driven to rotate for discharging in the ascending process of the inner mold 3241, which is just matched with the whole molding process; meanwhile, the discharging wheel 532 can rotate at a constant speed, and the powder is uniformly and quantitatively discharged, so that the batching is more accurate.

Example 2:

as shown in figures 1, 2 and 16, the continuous molding production method of two groups of powder materials for single crystal furnace production comprises the following steps:

step one, a die cavity 33 is arranged, wherein the die cavities 33 are sequentially arranged on the conveying belt 1 at equal intervals, and the conveying belt 1 drives the plurality of die cavities 33 to advance;

step two, in the mold entering process, the first track unit 41 and the second track unit 42 together drive the core mold assembly 321 and the inner mold assembly 324 of the mold entering mechanism 32 to move downward, so that the core mold assembly 321 reaches a set height relative to the mold cavity 33, and at this time, the second track unit 42 continues to drive the inner mold assembly 324 to move downward until the bottom of the inner mold 3241 is attached to the bottom of the mold cavity 33;

step three, a feeding process, namely after the mold feeding in the step two is completed, filling a high-quality powder filling cavity into the cavity between the mold cavity 33 and the inner mold 3241 by the first powder adding bin 51, then driving the inner mold assembly 324 to ascend by the second track unit 42, and gradually filling a slightly poor powder into the cavity between the inner mold 3241 and the core mold 3212 by the second powder adding bin 52 through the feeding unit 53;

step four, a lower layer powder compaction process, in step three, the inner mold component 324 moves upwards while the core mold component 321 maintains the relative position with the mold cavity 33, the elastic component 35 resets to enable the first pressing component 322 to ascend, the transmission component 6 transmits the rotary table 3221 to rotate, the presser foot 3222 hinged on the rotary table 3221 can do circular motion while ascending, and slightly inferior powder flowing below the presser foot 3221 is pressed and tamped until the presser foot 3222 is completely retracted into the core mold 3212;

step five, an upper layer powder compaction procedure, namely after the step four, the inner mold assembly 324 continuously rises, the leaning platform 32412 at the bottom of the inner mold 3241 props against the rotating member 3231 to move, a spiral track 32311 arranged on the rotating member 3231 is matched with a track boss 32121 arranged on the core mold 3212, so that the rotating member 3231 rotates and rises, and a press roller 3232 performs roll pressing on slightly inferior powder flowing out from the inner mold 3241;

step six, a demolding step, after the step five, the first track unit 41 drives the core mold assembly 321 to ascend until the mold-entering mechanism 32 is completely separated from the mold cavity 33, and the mold-entering mechanism 32 rotates along with the track assembly 4 for use.

The working process comprises the following steps:

the die cavity 33 is placed on the conveyer belt 1 right below the die-entering mechanism 32, the track component 4 drives the die-entering mechanism 32 to vertically move downwards until the position of the core die 3212 relative to the die cavity 33 reaches a preset position, the powder adding device 5 fills high-quality powder into the cavity between the die cavity 33 and the inner die 3241, meanwhile, high-frequency low-amplitude air vibration is applied to the upper surface of the space, so that the powder is slightly compacted and then the die-entering mechanism 32 is driven by the track component 4 to move reversely to drive the inner die 3241 to relatively separate from the die cavity 33, meanwhile, slightly poor powder is discharged downwards from a powder passing channel 32411 arranged in the inner cavity of the inner die 3241, the turntable 3221 rotates to drive the pressure foot 3222 to do circular motion to press the slightly poor powder to be closely attached to the high-quality powder, the pressure foot 3222 is driven to shrink into the core die 3212 by lifting and resetting of the turntable 3221 to form a complete core die model, the inner die 3241 continuously rises to drive the rotating piece 3231 to do circular motion to continue rolling of the slightly poor powder, until the mold-entering mechanism 32 is separated from the mold cavity 33, the filling molding is completed.

The above description is intended to be illustrative of the preferred embodiment of the present invention and should not be taken as limiting the invention, but rather, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Claims

1. The utility model provides a single crystal growing furnace production is with two sets of powder continuous type shaping production lines, includes conveyer belt (1), sets up in slewing chain device (2) of this conveyer belt (1) top one side, its characterized in that still includes:

the forming device (3) comprises a plurality of supports (31) fixedly arranged on the rotary chain device (2), mold entering mechanisms (32) which are restrained on the supports (31) in a one-to-one correspondence manner and can only move along the vertical direction, and mold cavities (33) matched with the mold entering mechanisms (32), wherein the mold cavities (33) are arranged on the conveying belt (1) right below the mold entering mechanisms (32);

the mold entering mechanism (32) comprises a core mold assembly (321), a first pressing assembly (322), a second pressing assembly (323), an inner mold assembly (324) and a mold entering frame (325), the core mold assembly (321) is arranged below the mold entering frame (325), the first pressing assembly (322) and the second pressing assembly (323) are sleeved on the outer side of the core mold assembly (321), and the first pressing assembly (322) and the second pressing assembly (323) press the compact powder on the outer side of the core mold assembly (321);

the track assembly (4) is arranged around the outer ring of the rotary chain device (2) and comprises a first track unit (41) and a second track unit (42), the first track unit (41) drives the die feeding frame (325) to vertically move, and the second track unit (42) drives the inner die assembly (324) to vertically move; and

the powder adding device (5) is arranged above the inside of the rotary chain device (2) and comprises a first powder adding bin (51), a second powder adding bin (52) and a feeding unit (53), the first powder adding bin (51) is communicated with the inner side wall of the die cavity (33) in a one-to-one correspondence mode through a hose, the feeding unit (53) is arranged above the powder passing channel (32411) in a one-to-one correspondence mode and communicated with the second powder adding bin (52) through a hose;

the core mold assembly (321) comprises a rotating rod (3211) and a core mold (3212) rigidly connected to the bottom of the rotating rod (3211), and the rotating rod (3211) is freely and rotatably connected to the mold frame (325); the first pressing assembly (322) comprises a rotary table (3221) which is sleeved on the rotary rod (3211) and freely slides relative to the rotary rod (3211), a pressure foot (3222) and a top cover (3223) which are arranged at the bottom of the rotary table (3221), wherein the pressure foot (3222) penetrates through the core mold (3212) and slides relative to the core mold (3212), the top cover (3223) covers the outer side of the rotary table (3221), a transmission assembly (6) is arranged between the rotary table (3221) and the mold inserting frame (325) and is in transmission connection with the transmission assembly, a pushing unit (3224) is arranged on the core mold assembly (321) to push the pressure foot (3222) to press downwards, an elastic piece (35) is arranged between the rotary table (3221) and the core mold (3212) to be connected with the transmission assembly, and the inner mold assembly (324) can be matched with the top cover (3223); the second pressing assembly (323) comprises a rotating piece (3231) sleeved on the core mold (3212) and a plurality of pressing rollers (3232) arranged on the circumference of the bottom of the rotating piece (3231), and the pressing rollers (3232) are connected with the rotating piece (3231) through elastic resetting; the inner die assembly (324) comprises an inner die (3241) and an inner die frame (3242) integrally connected with the inner die (3241), wherein a powder passing channel (32411) and a leaning platform (32412) capable of being matched and abutted against the rotating piece (3231) are arranged on the side wall of an inner cavity of the inner die (3241).

2. The two groups of powder continuous forming production lines for the single crystal furnace production as claimed in claim 1, wherein the shape of the presser foot (3222) is matched with the shape of the core mold (3212), and when the elastic member (35) is sprung open and reset, the presser foot (3222) is contracted into the core mold (3212) and forms a complete core mold model with the core mold (3212).

3. The two groups of powder continuous forming production lines for the single crystal furnace production according to claim 1, wherein the rotary table (3221) comprises a rotary drum (32211) and a toothed ring (32212) coaxially sleeved outside the rotary drum (32211), the rotary drum (32211) is axially slidably arranged relative to the toothed ring (32212), grooves (322111) are formed in the circumference of the rotary drum (32211) in the same direction along the axial direction of the rotary drum, and protrusions (322121) matched with the grooves (322111) are arranged on an inner ring of the toothed ring (32212).

4. The two groups of powder continuous forming production lines for the single crystal furnace production according to claim 3, wherein the pressure feet (3222) are hinged to the bottom of the rotating drum (32211) and are uniformly distributed along the circumference of the rotating drum (32211) at equal intervals.

5. The two groups of powder continuous forming production lines for single crystal furnace production according to claim 4, wherein the jacking unit (3224) comprises a first protrusion (32241) arranged on the top cover (3223) and a second protrusion (32242) arranged on the rotary drum (32211), and when the rotary drum (32211) rotates, the first protrusion (32241) pushes against the second protrusion (32242) to drive the presser foot (3222) to intermittently press down and press the powder while making a rotary motion.

6. The two groups of powder continuous forming production lines for the single crystal furnace production according to claim 1, characterized in that the core mold (3212) is provided with a track boss (32121), the track boss (32121) is arranged at the top of the core mold (3212) and protrudes out of the circumferential surface of the core mold (3212); the inner cavity of the rotating piece (3231) is provided with a spiral track (32311), the spiral track (32311) is clamped and covered on the track boss (32121) and slides relative to the track boss (32121), and the rotating piece (3231) moves along the axial direction relative to the core mould (3212) and simultaneously moves circularly.

7. The two groups of powder continuous type forming production lines for single crystal furnace production according to claim 3, wherein the transmission assembly (6) comprises a first gear (61), a second gear (62), a transmission shaft (63) and a spur rack (64), the first gear (61) and the second gear (62) are respectively arranged at two ends of the transmission shaft (63), the first gear (61) and the toothed ring (32212) are meshed, the transmission shaft (63) slides along the length direction of the mold entering frame (325), the spur rack (64) is fixedly arranged on the mold entering frame (325), and the second gear (62) and the spur rack (64) can be meshed in a matched manner.

8. The two-group powder continuous forming production line for single crystal furnace production according to claim 7, wherein the feeding unit (53) comprises:

the feeding bin (531) is fixedly arranged on the inner die (3241), and an opening is formed in the bottom of the feeding bin (531);

the discharging wheel (532) is matched with the feeding bin (531) in a rotating mode and is arranged at the opening at the bottom of the feeding bin (531); and

the ratchet wheel (533), the said discharge wheel (532) and said revolving stage (3221) of drive connection of the said ratchet wheel (533), the said ratchet wheel (533) engages with said spur rack (64) to drive the arrangement.

9. A continuous forming production method of two groups of powder materials for single crystal furnace production, which adopts the continuous forming production line of two groups of powder materials for single crystal furnace production as claimed in any one of claims 1-8, and is characterized by comprising the following steps:

step one, a die cavity (33) loading procedure, wherein die cavities (33) are sequentially placed on a conveying belt (1) at equal intervals, and the conveying belt (1) drives a plurality of die cavities (33) to advance;

step two, in the mold entering process, the first track unit (41) and the second track unit (42) drive the core mold assembly (321) and the inner mold assembly (324) of the mold entering mechanism (32) to move downwards together, so that the core mold assembly (321) reaches a set height relative to the mold cavity (33), and at the moment, the second track unit (42) continues to drive the inner mold assembly (324) to move downwards until the bottom of the inner mold (3241) is attached to the bottom of the mold cavity (33);

step three, a feeding process, namely after the mold feeding in the step two is completed, a first powder adding bin (51) fills a high-quality powder filling cavity into the cavity between the mold cavity (33) and the inner mold (3241), then a second track unit (42) drives the inner mold assembly (324) to ascend, and a second powder adding bin (52) gradually fills slightly poor powder into the cavity between the inner mold (3241) and the core mold (3212) through a feeding unit (53);

step four, a lower layer powder compacting procedure, in the step three, the inner mold component (324) moves upwards, the core mold component (321) maintains the relative position with the mold cavity (33), the elastic component (35) resets to enable the first pressing component (322) to ascend, the transmission component (6) transmits the rotary table (3221) to rotate, the presser foot (3222) hinged on the rotary table (3221) can do circular motion while ascending, and slightly different powder flowing below the presser foot (3222) is pressed and compacted until the presser foot (3222) is completely retracted into the core mold (3212);

step five, an upper layer powder compaction procedure, after the step four, the inner mold assembly (324) continues to rise, a leaning platform (32412) at the bottom of the inner mold (3241) props against the rotary piece (3231) to move, a spiral track (32311) arranged on the rotary piece (3231) is matched with a track boss (32121) arranged on the core mold (3212), so that the rotary piece (3231) rotates to rise, and a press roller (3232) presses slightly poor powder flowing out of the inner mold (3241);

and step six, in the demolding process, after the step five, the first track unit (41) drives the core mold assembly (321) to ascend until the mold feeding mechanism (32) is completely separated from the mold cavity (33), and the mold feeding mechanism (32) rotates along with the track assembly (4) for use.