CN113352612A - A two-way powder feeding mechanism for 3D printer - Google Patents
A two-way powder feeding mechanism for 3D printer Download PDFInfo
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- CN113352612A CN113352612A CN202110665444.7A CN202110665444A CN113352612A CN 113352612 A CN113352612 A CN 113352612A CN 202110665444 A CN202110665444 A CN 202110665444A CN 113352612 A CN113352612 A CN 113352612A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/30—Auxiliary operations or equipment
- B29C64/307—Handling of material to be used in additive manufacturing
- B29C64/321—Feeding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
- B29C64/205—Means for applying layers
- B29C64/214—Doctor blades
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y40/00—Auxiliary operations or equipment, e.g. for material handling
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Optics & Photonics (AREA)
- Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
Abstract
The invention provides a bidirectional powder feeding mechanism for a 3D printer, which comprises a powder hopper, a powder separating mechanism and a powder feeding mechanism, wherein the bottom of the powder hopper is embedded above the powder separating mechanism, and the powder feeding mechanism is arranged right below the powder separating mechanism; the powder feeding mechanism comprises a sleeve plate arranged right below the powder distributing mechanism and a bidirectional isolating guide strip fixedly arranged in the middle of the inner part of the sleeve plate, and the powder feeding mechanism can output powder twice through the powder distributing mechanism at an initial position, the output powder comprises forward laid powder and reserve powder during reverse laying, so that a scraper can continuously keep a laying state until unidirectional powder laying is finished when the scraper is in contact with the powder, bidirectional powder laying can be kept in the state, the powder laying stability is high, redundant lines cannot be generated, the scraper has a good working environment, and the appearance attractiveness of a workpiece is improved.
Description
Technical Field
The invention belongs to the field of 3D printers, and particularly relates to a bidirectional powder feeding mechanism for a 3D printer.
Background
The 3D printing technique, which may also be referred to as additive manufacturing, implements printing of three-dimensional models through an automated, numerically controlled, layer-by-layer material accumulation process. Compared with the traditional processing technology, the 3D printing technology does not need to manufacture a die additionally, and a finished product is directly processed. And can overcome the special structure obstacle that traditional machining can't realize, can realize the simplification production of arbitrary complicated structure part, can be automatic, directly, accurately will design the thought from the CAD model, convert into the model or the device that has certain function, 3D printer need spread powder on the powder bed before printing and handle.
Based on the above description, the inventor finds that the existing bidirectional powder feeding mechanism for the 3D printer mainly has the following defects, such as:
the existing bidirectional powder feeding mechanism needs to stop to supplement powder in the process of laying in the direction, and then carries the powder to lay, because in the laying surface of the powder bed, the scraper stays in the laying process to continuously lay the powder after supplementing the powder, and an obvious powder redundant line can appear at the front and back positions of the stagnation of the scraper on the powder bed in the process, and forms irreversible arrangement after laser curing, and the scraper easily interferes with the solidification redundant line when reversely laying.
Disclosure of Invention
In order to solve the technical problems, the invention provides a bidirectional powder feeding mechanism for a 3D printer, which aims to solve the problems that the existing bidirectional powder feeding mechanism needs to stop to replenish powder and then carry the powder to lay in the process of laying in the direction, a scraper stops to replenish the powder in the process of laying in the laying surface of a powder bed to continuously lay the powder, and an obvious powder redundant line appears at the positions before and after the stagnation of the scraper on the powder bed, forms irreversible arrangement after laser curing, and is easy to interfere with the solidified redundant line when the scraper is laid in the reverse direction.
Aiming at the defects of the prior art, the purpose and the effect of the bidirectional powder feeding mechanism for the 3D printer are achieved by the following specific technical means: a two-way powder feeding mechanism for a 3D printer, comprising: the powder distributing mechanism comprises a powder hopper, a powder distributing mechanism and a powder feeding mechanism, wherein the bottom of the powder hopper is embedded above the powder distributing mechanism, and the powder feeding mechanism is arranged right below the powder distributing mechanism;
the powder feeding mechanism comprises a sleeve plate arranged right below the powder distributing mechanism, a bidirectional guide separating strip fixedly arranged in the middle of the sleeve plate, a stop mechanism arranged right below the bidirectional guide separating strip, a bidirectional unloading plate arranged below the stop mechanism, and a scraper mechanism arranged below the bidirectional unloading plate; the bidirectional guide strip, the sleeve plate and the stock stop surround to form a first storage bin and a second storage bin which are symmetrically arranged; the powder dividing mechanism is used for respectively throwing equal amount of materials into the first storage bin and the second storage bin; the material blocking mechanism is used for controlling the first storage bin to discharge powder when the powder feeding mechanism is at an initial position, so that the powder is fed to the scraper mechanism through one side of the bidirectional unloading plate; and the material blocking mechanism is used for controlling the second storage bin to discharge powder when the powder feeding mechanism moves to the limit position, so that the powder is fed to the scraper mechanism through the other side of the bidirectional unloading plate.
As a further optimization, the stock stop comprises: the ejection mechanism comprises a baffle plate, a locking block, a guide rod, a spring and an ejector pin, wherein the baffle plate is provided with a discharge slot hole in a penetrating way; the spring is used for resetting the baffle when the powder feeding mechanism is at an initial position, so that the discharge groove hole of the baffle is opposite to the first storage bin for discharging powder; and the ejector pin is used for ejecting the baffle plate to compress the spring when the powder feeding mechanism moves to the limit position, so that the discharge groove hole of the baffle plate is over against the second storage bin for discharging powder.
As a further optimization, the locking blocks are symmetrically arranged on two sides of the baffle plate, and the locking blocks are accommodated in the accommodating cavity at the bottom of the sleeve plate so as to reduce the size.
As a further optimization, the scraper mechanism comprises a cutter locking bar, a side auxiliary bar and a blade clamped between the cutter locking bar and the bottom of the side auxiliary bar, wherein the top end of the cutter locking bar is fixedly arranged below the bidirectional unloading plate; the top of the side auxiliary strip is fixedly arranged on the lock knife strip.
As a further optimization, the powder separating mechanism comprises a hopper locking plate arranged below the powder hopper and penetrated by a feeding chute, a powder guiding suite arranged under the hopper locking plate, a powder discharging roller sleeve arranged in the powder guiding suite, powder conveying rollers arranged between the two powder discharging roller sleeves and wrapped, T-shaped locking plates arranged at two sides of the powder guiding suite, and a motor component arranged at the side surface of the powder guiding suite and mechanically connected with the powder conveying rollers, wherein the hopper locking plate is used for receiving materials thrown in the powder hopper, the materials fall into empty grooves above the two powder discharging roller sleeves, two groups of strip-shaped through holes are arranged below the powder guiding suite, the motor component drives the powder conveying rollers to rotate clockwise, strip-shaped grooves on the powder conveying rollers can carry the powder falling through the hopper locking plate, and the powder falls into strip-shaped grooves at the right side of the powder guiding suite after the powder conveying rollers rotate, and to send powder mechanism, and when defeated powder roller receives when motor element control anticlockwise rotation, the bar groove on defeated powder roller can carry the powder that falls through the hopper jam plate, the powder is in defeated powder roller falls into after rotatory in leading the left bar groove of powder external member, and to send powder mechanism.
As a further optimization, the bottom of the powder discharging roller sleeve is provided with a plurality of through grooves which are matched with the slotted holes at the bottom of the powder guiding sleeve one by one and used for enabling powder guided by the powder discharging roller sleeve to smoothly enter the powder guiding sleeve.
As a further optimization, the inclination angle of the outer side surface of the left slope and the right slope of the bidirectional unloading plate is 110-120 degrees.
As a further optimization, the outermost side of the extension inserting strip below the lock knife strip and the side auxiliary strip is provided with a guide-shaped slope.
Compared with the prior art, the invention has the following advantagesAdvantageous effects：
The powder feeding mechanism can output powder twice when the powder separating mechanism is at the initial position, the output powder comprises forward laid powder and reserve powder when the powder is laid reversely, the distances of the falling point areas of the powder before the powder is laid on the front side and the back side are consistent, and the falling point areas are arranged in the laying preparation range of the scraper mechanism, so that when the scraper enters a laying state after contacting the powder, the laying state can be continuously kept until the unidirectional powder laying is finished, the bidirectional powder laying can be kept in the state, the powder laying stability is high, redundant lines cannot be generated, the scraper has a good working environment, and the appearance attractiveness of a workpiece is improved.
Drawings
Fig. 1 is a schematic structural diagram of a bidirectional powder feeding mechanism for a 3D printer according to the present invention.
Fig. 2 is a detailed structural schematic diagram of the powder feeding mechanism.
Fig. 3 is a detailed structural schematic diagram of the stock stop.
Fig. 4 is a schematic cross-sectional structure diagram of a bidirectional powder feeding mechanism for a 3D printer according to the present invention.
Fig. 5 is a detailed structural diagram of the scraper mechanism.
Fig. 6 is a schematic sectional view of the doctor mechanism.
Fig. 7 is a sectional partially exploded view of the doctor mechanism.
Fig. 8 is a detailed structure diagram of the installation of the powder separating mechanism.
Fig. 9 is a detailed structure diagram of the installation of the powder separating mechanism.
Fig. 10 is a schematic view of the motor transmission structure.
In the figure: the powder feeding device comprises a powder hopper-1, a powder separating mechanism-2, a motor-3, a powder feeding mechanism-4, a sleeve plate-41, a bidirectional guide strip-42, a material blocking mechanism-43, a bidirectional discharge plate-44, a scraper mechanism-45, a locking block-431, a guide rod-432, a spring-433, a baffle-434, a thimble-435, a cutter locking strip-451, a blade-452, a side auxiliary strip-453, an inclined clamping strip 454, a 455 insertion strip, a hopper locking plate-21, a powder guide sleeve-22, a powder discharging roller sleeve-23, a powder conveying roller-24, a T locking plate-25, a gear-26 and a rack-31.
Detailed Description
The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Examples
As shown in figures 1 to 2:
the invention provides a bidirectional powder feeding mechanism for a 3D printer, which comprises: the powder distributing mechanism comprises a powder hopper 1, a powder distributing mechanism 2 and a powder feeding mechanism 4, wherein the bottom of the powder hopper 1 is embedded above the powder distributing mechanism 2, and the powder feeding mechanism 4 is arranged right below the powder distributing mechanism 2;
the powder feeding mechanism 4 comprises a sleeve plate 41 arranged right below the powder separating mechanism 2, a bidirectional guide strip 42 fixedly arranged in the middle of the inner part of the sleeve plate 41, a material stopping mechanism 43 arranged right below the bidirectional guide strip 42, a bidirectional discharging plate 44 arranged below the material stopping mechanism 43, and a scraper mechanism 45 arranged below the bidirectional discharging plate 44; the bidirectional guide strip 42, the sleeve plate 41 and the stock stop 43 surround to form a first storage bin and a second storage bin which are symmetrically arranged; the powder distributing mechanism 2 is used for respectively throwing equal amounts of materials into the first storage bin and the second storage bin; the material stopping mechanism 43 is used for controlling the powder discharging of the first storage bin when the powder feeding mechanism 4 is at an initial position, so that the powder is fed to the scraper mechanism 45 through one side of the bidirectional unloading plate 44; and the material blocking mechanism 43 is used for controlling the second storage bin to discharge powder when the powder feeding mechanism 4 moves to the limit position, so that the powder is fed to the scraper mechanism 45 through the other side of the bidirectional powder distributing plate 44.
As shown in fig. 3, the striker 43 includes: the device comprises a baffle 434, a locking block 431, a guide rod 432, a spring 433 and a thimble 435, wherein the baffle 434 is provided with a discharge slot hole in a penetrating manner, the locking block 431 is fixedly arranged on the baffle 434, the guide rod 432 penetrates through the locking block 431, one end of the guide rod 432 is sleeved with the spring 433, and the spring abuts against the locking block 431; the spring 433 is used for resetting the baffle 434 when the powder feeding mechanism 4 is at an initial position, so that the discharge slot of the baffle 434 is opposite to the first storage bin for discharging powder; the thimble 435 is used for pushing the baffle 434 to compress the spring 433 when the powder feeding mechanism 4 moves to the limit position, so that the discharge slot hole of the baffle 434 is opposite to the second storage bin for discharging powder.
The two ends of the guide rod 432 are embedded in the sleeve plate 41 and are in a fixed state, the locking block 431 and the baffle 434 are in a movable state, and the diameter of the left position of one sixth of the guide rod is 1.5 times that of the right position, so that the spring 433 can be just restrained.
The locking blocks 431 are symmetrically arranged at two sides of the baffle 434, and the locking blocks 431 are accommodated in the accommodating cavities at the bottom of the sleeve plate 41 to reduce the volume.
As shown in fig. 5, 6 and 7, the scraper mechanism 45 includes a blade locking strip 451, a side auxiliary strip 453 and a blade 452 clamped between the blade locking strip 451 and the bottom of the side auxiliary strip 453, wherein the top end of the blade locking strip 451 is fixed below the bidirectional discharging plate 44; the top of the side auxiliary bar 453 is fixed on the knife locking bar 451.
As a further improvement, the blade 452 is clamped between the locking blade 451 and the side auxiliary bar 453, the locking blade 451 and the side auxiliary bar 453 are simultaneously penetrated through by a plurality of bolts, an inclined clamping bar 454 is arranged above the blade 452, the insertion strips 455 are arranged below the locking blade 451 and the side auxiliary bar 453, the insertion strips 455 are made of rubber, the inclined clamping bar 454 above the locking blade 451 is transversely embedded in the insertion strips 455, the inclined clamping bar 454 is guided by the inclined surface on the insertion strips 455 during the installation process, the insertion strips 455 can be adaptively deformed according to the shape of the clamping groove formed between the blade 452 and the inclined clamping bar 454 during the gradual embedding process of the inclined clamping bar 454, and after the installation, the blade 452 is pressed to generate a certain inclination angle to extrude the powder during use.
As shown in fig. 8 and 9, the powder distributing mechanism 2 includes a hopper lock plate 21 disposed below the powder hopper 1 and having a feeding chute, a powder guiding sleeve 22 disposed under the hopper lock plate 21, a powder discharging roller sleeve 23 disposed inside the powder guiding sleeve 22, a powder conveying roller 24 disposed between the two powder discharging roller sleeves 23 and wrapped, T-lock plates 25 disposed at two sides of the powder guiding sleeve 22, and a motor assembly 3 disposed at a side of the powder guiding sleeve 22 and mechanically connected to the powder conveying roller 24, wherein the hopper lock plate 21 is used for receiving the material thrown by the powder hopper 1, the material falls into empty slots above the two powder discharging roller sleeves 23, two sets of bar-shaped through holes are disposed below the powder guiding sleeve 22, the motor assembly 3 drives the powder conveying roller 24 to rotate clockwise, the bar-shaped slots on the powder conveying roller 24 can carry the powder falling through the hopper lock plate 21, powder is in fall into after defeated powder roller 24 is rotatory in leading the bar groove on powder external member 22 right side, and to send powder mechanism 4 to send powder, and work as defeated powder roller 24 receives when motor element 3 control anticlockwise rotation, the bar groove on defeated powder roller 24 can carry through the powder that hopper jam plate 21 fell, the powder is in fall into after defeated powder roller 24 is rotatory in leading the left bar groove of powder external member 22, and to send powder mechanism 4 to send powder.
As a further improvement, the bottom of the powder discharging roller sleeve 23 is provided with a plurality of through grooves which are matched with the slotted holes at the bottom of the powder guiding sleeve 22 one by one, and the through grooves are used for enabling powder guided by the powder discharging roller sleeve 23 to smoothly enter the powder guiding sleeve 22.
Two groups of slotted holes are arranged below the powder discharging roller sleeve 23 and the powder guiding sleeve 22, and when each group of slotted holes rotates in the forward and reverse directions with the motor component 3, different effects are achieved on guiding the powder.
As a further improvement, the outer side surface of the left and right slopes of the bidirectional unloading plate 44 is inclined at an angle of 110-120 degrees.
Experiments show that the difference of the slope inclination angles of the bidirectional unloading plate 44 can cause the difference of the distances between powder falling points, when the angle is greater than 120 degrees, the slope angle is too large, the powder discharging efficiency is easily affected, when the powder is discharged, the distance between the powder falling points is too far and is relatively dispersed, when the angle is less than 110 degrees, the powder falling distance is too close, the impact force is large when the powder falls, the falling points can deviate towards the side of the cutter, and therefore the slope inclination angle of the bidirectional unloading plate 44 is preferably 115 degrees.
As a further improvement, the outermost side of the extension slip below the locking blade strip 451 and the side auxiliary strip 453 is provided with a guide-shaped slope.
As a further improvement, the motor assembly 3 comprises a gear 26 and a rack 31, one end of the powder conveying roller 24 is fixed with the gear 26 in a penetrating manner, and the gear 26 is connected with the motor assembly 3 through the rack 31.
The specific use mode and function of the embodiment are as follows:
when the motor assembly 3 is started, kinetic energy can be transmitted to the powder separating mechanism 2, so that the powder in the powder hopper 1 can be quantitatively transmitted through the consumption of the internal kinetic energy, and the powder is transmitted to the powder feeding mechanism 4;
in the motor assembly 3, one end of the powder conveying roller 24 is fixedly started with the gear 26 in a penetrating manner, when the powder conveying roller is rotated clockwise, the powder conveying roller 24 penetrating the gear 26 is driven by the rack 31, so that the powder conveying roller 24 is in a clockwise rotation motion state, the powder conveying roller 24 is accommodated in the powder conveying roller while being in contact with the powder in the rotating process through the two arc-shaped grooves arranged on the powder conveying roller 24, when the powder enters the side wall of the powder discharging roller sleeve 23 in a rotating manner, the powder accommodated in the powder conveying roller is separated from the powder in the powder hopper 1, when the powder passes through the groove opening below the right side of the powder discharging roller sleeve 23, the powder can be separated from the groove opening below the powder discharging roller sleeve 23 under the influence of the self weight of the powder, and falls down through the groove openings below the powder discharging roller sleeve 23, because the groove openings below the powder guiding sleeve 22 correspond to the groove openings of the powder discharging roller sleeve 3 of the powder discharging roller sleeve 2 one to one, and the powder can directly pass through the groove opening at the right end of the powder guiding sleeve 22, entering a powder feeding mechanism 4;
when the motor component 3 is started, the rotation is performed, the powder discharging roller sleeve 23 is driven to rotate anticlockwise through the transmission, and the powder finally enters the slotted hole on the left side of the powder guiding sleeve 22 through the slotted hole on the left side of the powder discharging roller sleeve 23 through the transmission motion of the powder so as to enter the powder feeding mechanism 4;
the discharge amount of the powder is controlled by the powder conveying roller 24, is in direct proportion to the number of turns of the powder conveying roller 24, and is controlled by the starting time of the motor component 3 through the number of turns, so that the introduction amount of the powder needs to be controlled, and the starting time of the motor component 3 needs to be controlled;
when the powder falls through the slotted hole at the right end of the powder guide sleeve 22, the powder enters the inclined plane at the right side of the bidirectional guide isolating bar 42 as shown in fig. 4, the powder can directly pass through the material blocking mechanism 43 and enter the inclined plane at the right side of the bidirectional unloading plate 44 to be guided due to the fact that the right side of the material blocking mechanism 43 at the bottom of the bidirectional guide isolating bar 42 is in a normally open state, so that the powder is output to a powder bed, and the powder output through the bidirectional unloading plate 44 can be stably output to the inside of the prepared working surface of the scraper mechanism 45 under the guidance of the inclined angle of 110-120 degrees;
when the powder falls through the slotted hole at the left end of the guide plate 22, the powder enters the inclined surface at the left side of the bidirectional guide bar 42 as shown in fig. 4, the left side of the material blocking mechanism 43 at the bottom of the bidirectional guide bar 42 is in a closed state, and the input powder is accumulated, and when accumulation is finished, the powder is stored above the material blocking mechanism 43 and in the left space inside the sleeve plate 41 and the bidirectional guide bar 42;
when the motor component 3 is powered off and stops working, the powder feeding mechanism 4 moves towards the right side to feed, and the powder uniformly accumulated on the preparation working surface on the right side of the scraper mechanism 45 is scraped;
when the powder feeding mechanism 4 moves to the rightmost side, as shown in fig. 4, the thimble 435 disposed at the rightmost side and on the same horizontal line with the baffle 434 presses the baffle 434, the pressed baffle 434 drives the lock 431 to move to the left side, and during the moving process, the lock 431 presses the spring 433, and the passage communicating with the powder discharge port at the right side of the bidirectional dispersing plate 44 as shown in fig. 4 is gradually closed, the powder outlet on the left side is gradually opened, when the powder outlet on the left side is completely opened, the powder stored in the space on the left side of the bidirectional isolating guide strip 42 enters the powder outlet on the left side and falls into the prepared working surface on the left side of the scraper mechanism 45, when the powder feeding mechanism 4 performs the scraping and laying process on the discharged powder toward the left side, the ejector pins 435 are gradually separated from the retainer 434, and the baffle 434 is restored to the original position in the resetting process of the spring 433, so that stable bidirectional powder paving operation is realized.
The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.
Claims (8)
1. The utility model provides a two-way powder feeding mechanism for 3D printer which characterized in that includes: the powder distributing device comprises a powder hopper (1), a powder distributing mechanism (2) and a powder feeding mechanism (4), wherein the bottom of the powder hopper (1) is embedded above the powder distributing mechanism (2), and the powder feeding mechanism (4) is arranged right below the powder distributing mechanism (2);
the powder feeding mechanism (4) comprises a sleeve plate (41) arranged right below the powder distributing mechanism (2), a bidirectional guide strip (42) fixedly arranged in the middle of the inner part of the sleeve plate (41), a material blocking mechanism (43) arranged right below the bidirectional guide strip (42), a bidirectional unloading plate (44) arranged below the material blocking mechanism (43), and a scraper mechanism (45) arranged below the bidirectional unloading plate (44); the bidirectional guide strip (42), the sleeve plate (41) and the material blocking mechanism (43) surround to form a first storage bin and a second storage bin which are symmetrically arranged; the powder distributing mechanism (2) is used for respectively feeding equal amount of materials to the first storage bin and the second storage bin; the material blocking mechanism (43) is used for controlling the powder discharge of the first storage bin when the powder feeding mechanism (4) is at an initial position, so that powder is fed to the scraper mechanism (45) through one side of the bidirectional unloading plate (44); and the material blocking mechanism (43) is used for controlling the second storage bin to discharge powder when the powder feeding mechanism (4) moves to the limit position, so that the powder is fed to the scraper mechanism (45) through the other side of the bidirectional unloading plate (44).
2. A bi-directional powder feed mechanism for a 3D printer as claimed in claim 1, wherein: the striker (43) comprises: the device comprises a baffle (434) which is provided with a discharging slot hole in a penetrating way, a locking block (431) which is fixedly arranged on the baffle (434), a guide rod (432) which penetrates through the locking block (431), a spring (433) which is sleeved at one end of the guide rod (432) and props against the locking block (431), and a thimble (435); the spring (433) is used for resetting the baffle (434) when the powder feeding mechanism (4) is at an initial position, so that the discharge slot hole of the baffle (434) is opposite to the first storage bin for discharging powder; the ejector pin (435) is used for ejecting the baffle plate (434) to compress the spring (433) when the powder feeding mechanism (4) moves to the limit position, so that the discharge groove hole of the baffle plate (434) is opposite to the second storage bin for discharging powder.
3. A bi-directional powder feed mechanism for a 3D printer as claimed in claim 2, wherein: the locking blocks (431) are symmetrically arranged at two sides of the baffle (434), and the locking blocks (431) are accommodated in an accommodating cavity at the bottom of the sleeve plate (41) to reduce the volume.
4. A bi-directional powder feed mechanism for a 3D printer as claimed in claim 1, wherein: the scraper mechanism (45) comprises a knife locking strip (451), a side auxiliary strip (453) and a blade (452) clamped between the knife locking strip (451) and the bottom of the side auxiliary strip (453), wherein the top end of the knife locking strip (451) is fixedly arranged below the bidirectional unloading plate (44); the top of the side auxiliary strip (453) is fixedly arranged on the knife locking strip (451).
5. A bi-directional powder feed mechanism for a 3D printer as claimed in claim 1, wherein: the powder distributing mechanism (2) comprises a hopper lock plate (21) arranged below a powder hopper (1) and penetrating through a feed chute, a powder guiding sleeve (22) arranged under the hopper lock plate (21), a powder discharging roller sleeve (23) arranged inside the powder guiding sleeve (22), two powder conveying rollers (24) coated in the middle of the powder discharging roller sleeves (23), T locking plates (25) arranged on two sides of the powder guiding sleeve (22), and a motor assembly (3) arranged on the side surface of the powder guiding sleeve (22) and mechanically connected with the powder conveying rollers (24), wherein the hopper lock plate (21) is used for bearing materials thrown in the powder hopper (1) and the materials fall into two empty grooves above the powder discharging roller sleeves (23), two sets of bar-shaped through holes are arranged below the powder guiding sleeve (22), and the motor assembly (3) drives the powder conveying rollers (24) to rotate clockwise, defeated powder roller (24) last bar groove can carry through the powder that hopper jam plate (21) fell, the powder is in defeated powder roller (24) is rotatory the back falls into lead in the bar groove on powder external member (22) right side, and to send powder mechanism (4) to send powder, and work as defeated powder roller (24) receive when motor element (3) control anticlockwise rotation, bar groove on defeated powder roller (24) can carry through the powder that hopper jam plate (21) fell, the powder is in defeated powder roller (24) is rotatory the back falls into lead in the left bar groove of powder external member (22), and to send powder mechanism (4) to send powder.
6. A bi-directional powder feed mechanism for a 3D printer as claimed in claim 1, wherein: the powder discharging roller sleeve (23) is provided with a plurality of through grooves at the bottom, the through grooves are matched with the slotted holes at the bottom of the powder guiding sleeve (22) one by one, and powder guided by the powder discharging roller sleeve (23) smoothly enters the powder guiding sleeve (22).
7. A bi-directional powder feed mechanism for a 3D printer as claimed in claim 1, wherein: the inclination angle of the outer side surface of the left slope and the right slope of the bidirectional unloading plate (44) is 110-120 degrees.
8. A bi-directional powder feed mechanism for a 3D printer as claimed in claim 4, wherein: and the outermost sides of the extension inserting strips below the locking knife strip (451) and the side auxiliary strips (453) are provided with guide-shaped slopes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN113352612B (en) | 2023-06-20 |
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