CN115008752A - Jacking mechanism and three-dimensional inkjet printer - Google Patents
Jacking mechanism and three-dimensional inkjet printer Download PDFInfo
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- CN115008752A CN115008752A CN202210568471.7A CN202210568471A CN115008752A CN 115008752 A CN115008752 A CN 115008752A CN 202210568471 A CN202210568471 A CN 202210568471A CN 115008752 A CN115008752 A CN 115008752A
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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
- B29C64/379—Handling of additively manufactured objects, e.g. using robots
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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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Abstract
The invention discloses a jacking mechanism and a three-dimensional printer, wherein the height of a thimble on a thimble plate is set to be gradually reduced from a middle area to a peripheral area. In the process of separating the workpiece from the printing platform by the jacking mechanism, the ejector pins higher in the middle of the ejector pin plate can contact the workpiece firstly, part of the workpiece or part of the workpiece is jacked away from the printing platform, and then the lower ejector pins can jack the rest of the workpiece or the rest of the workpiece. The acting force of the jacking mechanism can be successively concentrated on the ejector pins contacted with the workpiece, so that the process of jacking the workpiece by the ejector pins is smoother, and the effect of separating the workpiece from the printing platform is improved. The highest ejector pin is arranged in the middle area of the ejector pin plate, so that the stress process of the ejector pin plate is reduced from the middle to the periphery; compare with regional all around, the regional structural strength in middle part is bigger, even bear the biggest effort of work piece earlier also can not be light fragile deformation, from this, can make thimble board's whole atress position more reasonable to improve thimble board's overall structure stability.
Description
Technical Field
The invention relates to the technical field of three-dimensional printers, in particular to a jacking mechanism and a three-dimensional printer.
Background
Three-dimensional printing is a technique of constructing an object by printing layer by layer using an adhesive material such as powdered metal, plastic, or photocurable resin on the basis of a digital model file.
The three-dimensional photo-curing forming method is an important branch of a three-dimensional printing technology, and comprises the steps of irradiating the surface of liquid photosensitive resin by utilizing laser with specific wavelength and intensity to cure a layer of resin in a specific area on the surface, descending a lifting platform for a certain distance after one layer of resin is cured, uniformly covering a layer of liquid resin on the cured layer by a coating scraper, irradiating and curing the next layer of resin by utilizing the laser, and repeating the steps to finally obtain a three-dimensional workpiece formed by stacking layers.
In the existing three-dimensional printer, after printing, a three-dimensional workpiece is separated from a printing platform through a thimble of a jacking mechanism, but the heights of the thimbles are the same, so that the acting force of the jacking mechanism is dispersed in the jacking process, the jacking difficulty is high, and the separation effect of the workpiece and the printing platform is poor.
Disclosure of Invention
The invention mainly aims to provide a jacking mechanism and aims to solve the technical problem of how to improve the separation effect of a workpiece and a printing platform.
In order to achieve the purpose, the jacking mechanism provided by the invention is applied to a three-dimensional printer and comprises a thimble plate, wherein the thimble plate comprises a plate body and a plurality of thimbles arranged on the plate body, the plate body is provided with a middle area and a peripheral area positioned around the middle area, the thimbles are distributed in the middle area and the peripheral area, and the heights of the thimbles are gradually reduced from the middle area to the peripheral area.
Optionally, the top ends of the plurality of thimbles are all located on a parabola with an opening facing the plate body.
Optionally, the thimble located at the center of the middle region is a first thimble, and on any side of the first thimble in the transverse direction, the height h of each thimble satisfies the following relation: h is ax 2 + c; wherein x is the distance between each thimble and the first thimble, and the unit of x is millimeter; the value interval of a is [ 0.005 ] to [ 0.001 ], and the value interval of c is [ 15 ] to [ 20 ].
Optionally, in the circumferential direction of the first thimble, heights of a plurality of thimbles that are equidistant from the first thimble decrease progressively along the circumferential direction of the first thimble.
Optionally, the largest one of the plurality of ejector pins is a second ejector pin, and the distance between the second ejector pin and the first ejector pin is greater than 0 and less than or equal to 200 mm.
Optionally, the plurality of ejector pins are distributed on the plate body at equal intervals.
Optionally, the height difference between two adjacent thimbles is 3mm to 5 mm.
Optionally, the jacking mechanism comprises at least two of the ejector plates, and the at least two ejector plates are mutually spliced along the length direction and/or the width direction of the plate body.
Optionally, the jacking mechanism further comprises a partition plate, the partition plate is detachably mounted on the ejector plate, the partition plate is provided with a plurality of through holes, and the through holes are used for the ejector pins to pass through, so that the partition plate is close to the ejector pins and connected to one end of the plate body.
The invention also provides a three-dimensional printer, which comprises a fixing plate, a material groove, a printing platform and a jacking mechanism; the jacking mechanism comprises a thimble plate, the thimble plate comprises a plate body and a plurality of thimbles arranged on the plate body, the plate body is provided with a middle area and a peripheral area positioned around the middle area, the thimbles are distributed in the middle area and the peripheral area, and the heights of the thimbles are gradually reduced from the middle area to the peripheral area;
the printing platform is connected with the fixed plate in a sliding mode in a direction perpendicular to the bottom of the trough, and the printing platform is used for bearing a formed workpiece; the ejection mechanism is arranged at the bottom of the trough, and when the printing platform moves towards the bottom of the trough, an ejector pin of the ejection mechanism penetrates through the printing platform and ejects the formed workpiece.
According to the technical scheme of the jacking mechanism, the heights of the thimbles on the thimble plate are set to be gradually reduced from the middle area to the peripheral area. In the process of separating the workpiece from the printing platform by the jacking mechanism, the ejector pin with a higher middle part of the ejector pin plate firstly contacts the workpiece to jack part of the workpiece or part of the workpiece away from the printing platform, and then the ejector pin with a lower middle part jacks the rest of the workpiece or the rest of the workpiece. Therefore, the acting force of the jacking mechanism can be successively concentrated on the ejector pins in contact with the workpiece, so that the process of jacking the workpiece by the ejector pins is smoother, and the effect of separating the workpiece from the printing platform is improved. In the process of jacking the workpiece by the jacking mechanism, the thimble which firstly contacts the workpiece is subjected to the largest force, because the workpiece is completely connected to the printing platform at the moment; the force applied to the ejector pin which is in contact with the workpiece is correspondingly reduced, because the connecting force between the workpiece and the printing platform is gradually reduced. Therefore, the highest ejector pin is arranged in the middle area of the ejector pin plate, so that the stress process of the ejector pin plate is reduced from the middle to the periphery; compared with the surrounding area, the structural strength of the middle area is higher, and the ejector retainer plate is not easy to damage and deform even if the largest acting force of a workpiece is borne firstly, so that the whole stress position of the ejector retainer plate is more reasonable, and the stability of the whole structure of the ejector retainer plate is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a jacking mechanism according to an embodiment of the present invention;
FIG. 2 is a schematic side view of a jack-up mechanism according to an embodiment of the present invention;
FIG. 3 is a schematic diagram showing the coordinates of parabolas on which the tips of the plurality of pins shown in FIG. 2 are located;
FIG. 4 is a schematic side view of a jack-up mechanism according to another embodiment of the present invention;
FIG. 5 is a schematic diagram showing the coordinates of parabolas on which the tips of the plurality of pins shown in FIG. 4 are located;
FIG. 6 is a schematic side view of a jack-up mechanism according to another embodiment of the present invention;
FIG. 7 is a schematic top view of a jacking mechanism according to an embodiment of the present invention.
The reference numbers illustrate:
| reference numerals | Name(s) | Reference numerals | Name (R) | Reference numerals | Name (R) |
| 100 | |
10 | |
20 | |
| 21 | |
22 | |
30 | Base plate |
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
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.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is 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 at least one such feature. In addition, the meaning of "and/or" appearing throughout is to include three juxtapositions, exemplified by "A and/or B," including either the A or B arrangement, or both A and B satisfied arrangement. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The invention provides a jacking mechanism and a three-dimensional printer. The three-dimensional printer is used for implementing a three-dimensional printing technology, the three-dimensional printing technology is a new manufacturing technology which takes a computer three-dimensional design model as a blueprint, and special materials such as metal powder, ceramic powder, plastics, cell tissues and the like are stacked and bonded layer by using a laser beam, a hot melting nozzle and the like through a software layering dispersion and numerical control molding system, and finally, the materials are stacked and molded to manufacture solid products. Different from the traditional manufacturing industry in which the raw materials are shaped and cut in a machining mode such as a die and a turn-milling mode to finally produce finished products, the three-dimensional printing technology changes a three-dimensional entity into a plurality of two-dimensional planes, and the materials are processed and overlapped layer by layer to produce, so that the manufacturing complexity is greatly reduced. Therefore, the digital manufacturing mode has the natural advantages of simple process, low customization cost, short production period and the like, and can be extended to a wider production crowd.
The three-dimensional printer comprises a fixing plate, a trough, a printing platform and a jacking mechanism.
The fixing plate is an integral frame of the three-dimensional printer; the feed groove is connected with the fixed plate and used for containing source liquid; the printing platform is connected with the fixing plate in a sliding mode in the direction perpendicular to the bottom of the material groove and used for bearing a forming part, namely laser beam irradiation source liquid is emitted by an optical mechanical platform of the three-dimensional printer and is solidified and formed on the printing platform; the jacking mechanism is arranged at the bottom of the trough and used for jacking the formed part after penetrating through the printing platform. The three-dimensional printer further comprises a material taking assembly, the material taking assembly is connected with the fixing plate in a sliding mode, and the material taking assembly is used for scraping molded parts from the printing platform.
In order to make the person skilled in the art have a more intuitive understanding of the three-dimensional printer of the present invention, the printing principle of the three-dimensional printer of the present invention will be explained by taking a specific implementation process as an example.
1: the optical machine platform emits laser beams to irradiate the source liquid in the material groove, and the source liquid is solidified and formed on the printing platform to obtain a formed workpiece; 2: the printing platform moves towards the bottom of the material groove until the jacking mechanism penetrates through the printing platform, and the jacking mechanism exerts force on the formed workpiece so as to separate the formed workpiece from the printing platform; 3: the material taking assembly sweeps the printing platform transversely to scrape the formed workpiece from the printing platform. And (4) repeating the steps 1 to 3 by the three-dimensional printer, thereby realizing the automatic production of the formed workpiece.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a jacking mechanism according to an embodiment of the present invention. The jacking mechanism comprises an ejector plate 100, and the ejector plate 100 is connected with the bottom of the trough. The ejector plate 100 includes a plate body 10 and an ejector pin 20, and the ejector pin 20 is attached to an upper surface of the plate body 10.
The printing platform is provided with a plurality of through holes, the area of the printing platform, where the through holes are formed, is used for bearing a formed workpiece, and the ejector pins 20 are used for penetrating through the through holes when the printing platform moves towards the bottom of the trough so as to jack up the formed workpiece.
Referring to fig. 2, fig. 2 is a schematic side projection view of a jacking mechanism according to an embodiment of the present invention. It can be understood that the number of the ejector pins 20 corresponds to the number of the through holes on the printing platform, the plate body 10 has a central region and a peripheral region located around the central region, the plurality of ejector pins 20 are distributed in the central region and the peripheral region, and the heights of the plurality of ejector pins 20 decrease from the central region to the peripheral region.
For example, the heights of the plurality of ejector pins 20 may be decreased radially with the highest ejector pin 20 as a center; namely, the first ring of needles 20 surrounds the highest needle 20, the height of the first ring of needles 20 is less than that of the highest needle 20, the second ring of needles 20 surrounds the first ring of needles 20, and the height of the second ring of needles 20 is less than that of the first ring of needles 20. Of course, the plurality of ejector pins 20 may also be divided into a plurality of rows along the length direction of the plate body 10, and the height of each ejector pin 20 in each row of ejector pins 20 is the same; the height of the rows of the plurality of ejector pins 20 decreases from the middle of the plate body 10 toward the opposite two sides of the plate body 10.
The height of the thimble 20 is the length of the thimble 20 from the end connected to the plate body 10 to the end away from the plate body 10. When the ejector plate 100 starts to eject the formed workpiece, the highest ejector pin 20 in the middle area contacts the formed workpiece first, and after a part of the formed workpiece is ejected by the highest ejector pin 20 or the adhesion between the formed workpiece and the printing platform is reduced, other ejector pins 20 with gradually decreasing heights sequentially contact the workpiece to eject the workpiece gradually. The formed workpiece may be a single workpiece with a larger projection area, or may be multiple workpieces with smaller projection areas, and in this embodiment, multiple workpieces with smaller projection areas distributed on the printing platform are taken as an example.
The highest ejector pin 20 in the middle area contacts with a part of the workpiece first, and as the ejector plate 100 and the printing platform approach each other, the acting force of the ejector plate 100 is concentrated on the contacted part of the workpiece through the highest ejector pin 20 so as to jack up the part of the workpiece first. It can be understood that when the other ejector pins 20 with decreasing heights contact the rest of the workpiece, the force applied to the ejector pin 20 with a larger height from the workpiece is reduced, and at this time, the force applied to the ejector pin plate 100 can be concentrated on the rest of the workpiece by the ejector pins 20 with decreasing heights, so as to smoothly eject the rest of the workpiece. That is to say, in the process of jacking up the workpiece, part of the workpiece is jacked up firstly, and the rest of the workpiece is jacked up, so that the jacked workpiece can be stressed in a centralized manner, and the jacking difficulty is reduced. In addition, in the process of jacking the workpiece by the ejector plate 100, the ejector pins 20 in the middle area are firstly stressed, the ejector pins 20 in the peripheral area are secondly stressed, and the stress on the ejector pins 20 in the peripheral area is obviously smaller as the ejector pins 20 in the middle area partially or locally jack up the workpiece; for the ejector plate 100, the structural strength of the middle area is greater than that of the peripheral area, so that the stress of the peripheral area is smaller than that of the middle area, the whole stress process of the ejector plate 100 can be more reasonable, the peripheral area is prevented from being deformed and damaged due to excessive stress, and the whole structural strength of the ejector plate 100 can be improved.
In the technical scheme of the jacking mechanism, the height of the thimble 20 on the thimble plate 100 is set to be gradually reduced from the middle area to the peripheral area. During the process of separating the workpiece from the printing platform by the jacking mechanism, the ejector pin 20 with a higher middle part of the ejector pin plate 100 contacts the workpiece first to jack part of the workpiece or part of the workpiece away from the printing platform, and then the ejector pin 20 with a lower middle part jacks the rest of the workpiece or the rest of the workpiece. Therefore, the acting force of the jacking mechanism can be successively concentrated on the ejector pins 20 which are in contact with the workpiece, so that the process of jacking the workpiece by the ejector pins 20 is smoother, and the effect of separating the workpiece from the printing platform is improved. In the process of jacking the workpiece by the jacking mechanism, the thimble 20 which firstly contacts the workpiece is subjected to the largest force, because the workpiece is completely connected to the printing platform at the moment; the force applied to the ejector pin 20 which is in rear contact with the workpiece is reduced accordingly, since the force of the connection between the workpiece and the printing platform is gradually reduced. Therefore, by arranging the highest ejector pin 20 in the middle area of the ejector plate 100, the stress process of the ejector plate 100 can be reduced from the middle to the periphery; compared with the surrounding area, the structural strength of the middle area is higher, and the ejector plate 100 cannot be easily damaged and deformed even if the maximum acting force of a workpiece is borne first, so that the whole stress position of the ejector plate 100 is more reasonable, and the stability of the whole structure of the ejector plate 100 is improved.
In the side projection direction of the ejector plate 100, the top ends of the plurality of ejector pins 20 may be located on a curve or a broken line opening toward the plate body 10, so that the pitch of the plurality of ejector pins 20 and the height thereof form a certain regular relationship. For example, referring to fig. 3, fig. 3 is a schematic coordinate diagram of a parabola where top ends of the plurality of thimbles 20 in fig. 2 are located. The top ends of the plurality of ejector pins 20 are all located on a parabola with an opening facing the plate body 10, it should be noted that the ejector pin plate 100 has a plurality of side projection directions, and in a certain side projection direction, the top ends of the plurality of ejector pins 20 are located on a parabola; in the projection direction of the other side, the top ends of the plurality of thimbles 20 are positioned on another parabola; that is, regardless of which side of the lateral direction the ejector plate 100 is projected, the projected tips of the ejector pins 20 fall on a parabola. Therefore, the height of the ejector pins 20 can be changed more orderly, and the time for each ejector pin 20 to contact the workpiece is more reasonable.
Specifically, as shown in fig. 3, the thimble 20 located at the center of the middle region is a first thimble 21, and on any side of the first thimble 21 in the transverse direction, the height h of each thimble 20 satisfies the following relation: h ═ ax2+ c; wherein x is a distance between each of the ejector pins 20 and the first ejector pin 21, and the unit of x is millimeter; the value interval of a is [ 0.005 ] to [ 0.001 ], and the value interval of c is [ 15 ] to [ 20 ]. It is understood that, in the above relation, c corresponds to the height of the uppermost needle 20, that is, the height of the first needle 21 at the center is the highest; the heights of the other pins 20 decrease with the distance from the first pin 21, and the variation rule satisfies the relation.
Since the distance between the pins 20 is always a positive value, the parabolas on both sides of the highest point of the parabola on the coordinate axis reflect the height of the pins 20 on both sides of the first pin 21. The distance x between the height h of each thimble 20 and the first thimble 21 is set to satisfy "h ═ ax2+ c", so that the height change of the plurality of thimbles 20 is more gradual, and after the first thimble 21 contacts the workpiece, the subsequent thimbles 20 can contact the rest of the workpiece more timely, thereby avoiding the stress time of the single thimble 20 from being too long, and improving the overall jacking efficiency of the thimble 20 to the workpiece.
In the circumferential direction of the first pin 21, the heights of the plurality of pins 20 that are equally spaced from the first pin 21 may be the same or different. If the heights of the plurality of pins 20 at equal intervals to the first pin 21 are the same, it is described that a in the above relation h ═ ax2+ c takes the same value in the parabola passing through each of the pins 20. Illustratively, in the circumferential direction of the first needle 21, the heights of the needles 20 equally spaced from the first needle 21 decrease progressively along the circumferential direction of the first needle 21. That is, in the multiple parabolas passing through the first thimble 21, the value of a is decreased progressively; taking 5 parabolas passing through the first thimble 21 as an example, a can be-0.001, -0.002, -0.003, -0.004 and-0.005 on each parabola. In this way, the heights of the plurality of pins 20 equally spaced from the first pin 21 are gradually decreased along the circumferential direction of the first pin 21, so that the top ends of the plurality of pins 20 are located on a spiral line.
For example, one of the needles 20 that is equidistant from the first needle 21 is defined as a third needle 20, and the height of the third needle 20 decreases progressively along the circumferential direction of the first needle 21. After the first thimble 21 contacts the workpiece, the third thimble 20 does not contact the workpiece all at the same time, but contacts the workpiece one after another, so that the workpiece can be jacked up along the spiral direction, and the stress time of each part of the workpiece can be staggered sufficiently, so that the single position of the workpiece can be stressed in a concentrated manner at one moment, and the concentrated stress position is variable. Therefore, the workpiece can be smoothly separated from the printing platform, so that the jacking difficulty of the jacking mechanism on the workpiece is reduced, and the jacking efficiency is improved.
For example, referring to fig. 4 and 5, fig. 4 is a schematic side projection view of another embodiment of the jacking mechanism of the present invention; fig. 5 is a schematic coordinate diagram of a parabola in which the top ends of the plurality of thimbles 20 in fig. 4 are located. The highest of the plurality of the thimbles 20 is a second thimble 22, and a distance D between the second thimble 22 and the first thimble 21 is greater than 0 and less than or equal to 200 mm. It should be noted that, at this time, the center needle 20 is no longer the highest needle 20, and therefore, the relationship between the height of each needle 20 and the pitch of the first needles 21 is: h-ax 2+ bx + c, as shown in fig. 5. At this time, the vertex of the parabola is the top end of the second thimble 22, and the distance between the second thimble 22 and the first thimble 21 is [ b/a ], so the value of b may be (0,0.2 ], and the distance between the second thimble 22 and the first thimble 21 is greater than 0 and less than or equal to 200 mm.
The first thimble 21 and the highest second thimble 22 in the center are set as different thimbles 20, so that the highest second thimble 22 does not need to be fixed in the center of the thimble plate 100. That is, the position of the second thimble 22 on the thimble plate 100 is adjustable, and the adjustment of the position of the second thimble 22 can be realized by movably connecting or detachably connecting the second thimble 22 to the thimble plate 100. Of course, regardless of the position of the second needle 22, the distance D between the second needle and the first needle 21 is less than or equal to 200 mm. That is, for the thimble plate 100, the position of the highest thimble 20 may be changed within a circle with a radius of 200mm, and the positions of the other thimbles 20 may be changed according to the position of the highest thimble 20, that is, the positions of the other thimbles 20 may be adjusted. Thus, the ejector pin plate 100 can correspond to workpieces of different shapes by setting the position of the highest ejector pin 20, so that a scheme for changing the height of the ejector pin 20 most suitable for ejecting a preset workpiece can be matched, and the ejecting effect on different workpieces is improved.
Illustratively, the plurality of ejector pins 20 are distributed on the plate body 10 at equal intervals, so that the distribution uniformity of the ejector pins 20 on the plate body 10 can be improved, and the overall stress distribution of the ejector pin plate 100 is more uniform. A
Illustratively, the height difference H between two adjacent thimbles 20 is 3mm to 5 mm. If the height difference H between two adjacent ejector pins 20 is less than 3mm, in the process of ejecting the workpiece, considering the deformation amount of the workpiece, when the workpiece is not effectively ejected from the printing platform by a higher ejector pin 20, the shorter ejector pin 20 may already contact the workpiece, which easily causes dispersion of the acting force; if the height difference H between two adjacent ejector pins 20 is greater than 5mm, after the workpiece is ejected by the higher ejector pin 20, the shorter ejector pin 20 can start to contact the workpiece only by relatively moving the ejecting mechanism and the printing platform by a relatively large ineffective distance, so that the workpiece separation efficiency is reduced; therefore, the height difference H between two adjacent thimbles 20 is 3mm to 5mm, which not only can ensure the separation effect of the workpieces, but also can improve the separation efficiency of the workpieces.
One ejector plate 100 may correspond to all the areas of the printing table, or may correspond to only a partial area of the printing table, and then the plurality of ejector plates 100 are combined to correspond to all the areas of the printing table. Referring to fig. 6 and 7, fig. 6 is a schematic side projection view of another embodiment of the jacking mechanism of the present invention; FIG. 7 is a schematic top view of a jacking mechanism according to an embodiment of the present invention. The jacking mechanism comprises at least two ejector pin plates 100, and the at least two ejector pin plates 100 are spliced with each other along the length direction and/or the width direction of the plate body 10.
At least two ejector pin plates 100 may be arranged along the same direction, or may be arranged in a grid shape, which is not limited herein, and only needs to satisfy that the arrangement direction is parallel to the plate body 10. The two adjacent ejector plates 100 may be connected to each other or not, and are not limited herein. After at least two ejector pin plates 100 are spliced, the upper ejector pins 20 can be arranged in the middle, and the lower ejector pins 20 can be arranged on two sides; or the middle of the lower set of the ejector pins 20 may be provided, and the upper set of the ejector pins 20 are provided at two sides, which is not limited herein. Divide ejector mechanism into a plurality of ejector plate 100 of amalgamation each other, can reduce the processing degree of difficulty to ejector plate 100, avoid carrying out a lot of processing to the great board of a monoblock area to prevent that the plate body 10 from warping, thereby improve ejector plate 100's structural stability.
Illustratively, as shown in fig. 7, the jacking mechanism comprises 4 ejector plates 100, and the 4 ejector plates 100 are spliced in a shape like a Chinese character 'tian'. 4 thimble boards 100 set up to the same specification, and the 20 groups of the highest thimble in each thimble board 100 are close to 4 thimble board 100's amalgamation department, so, can make 4 thimble boards 100 needles after the amalgamation whole highly arrange of sinusoidal to work piece that messenger print platform was last can begin to separate towards both sides from print platform's middle part, thereby can shorten all work pieces and follow the required time of print platform separation, with the separation efficiency to the work piece of improvement.
Illustratively, as shown in fig. 6 and 7, the jacking mechanism further comprises a base plate 30, and the at least two ejector plates 100 are mounted to the base plate 30. The base plate 30 can serve as a common coupling structure for a plurality of ejector plates 100, so that the structure of the jacking mechanism can be more compact and stable.
Exemplarily, the jacking mechanism further comprises a partition plate, the partition plate is detachably mounted on the ejector plate 100, the partition plate is provided with a plurality of via holes, and the via holes are used for the ejector pins 20 to pass through, so that the partition plate is close to the ejector pins 20 and is connected to one end of the plate body 10.
The bottom in silo is located to the jack-up mechanism, and the work piece falls into and can fall on the jack-up mechanism behind the silo, finally falls on the baffle, can not directly deposit at the upper surface of plate body 10. When the jacking mechanism needs to be cleaned, the partition plate can be detached from the ejector plate 100, and then the partition plate and the ejector plate 100 are separately cleaned, so that the cleaning effect on the partition plate and the ejector plate 100 can be improved simultaneously, and the cleaning difficulty on the jacking mechanism is reduced. The separator may be provided as a metal plate, so that the corrosion resistance of the separator can be improved to allow the separator, which is immersed in the source liquid for a long period of time, to maintain its shape.
When the jacking mechanism works, the scraps of the workpieces can be deposited on the partition plates and can not be deposited on the plate body 10 of the ejector plate 100; when the jacking mechanism needs to be cleaned, the partition plate can be detached from the ejector plate 100 and then cleaned independently. Compared with the ejector plate 100 with the ejector pins 20, the partition plate with the through holes is less difficult to clean, and the ejector plate 100 can not accumulate scraps under the isolation effect of the partition plate, so that the cleaning difficulty of the jacking mechanism can be reduced, and the cleaning efficiency is improved.
Because the heights of the thimbles 20 are gradually reduced from the middle area to the peripheral area, when the partition plate is installed, the thimble 20 with the highest middle part can firstly pass through the partition plate to be preliminarily positioned, and then other thimbles 20 with the gradually reduced heights gradually pass through the partition plate, that is, the through hole on the partition plate does not need to be completely aligned with the thimble 20 of the thimble plate 100 at a time, and only needs to be aligned with the highest thimble 20 in the thimbles 20 which do not pass through yet, so that the installation difficulty of the partition plate and the thimble plate 100 can be reduced.
The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. The utility model provides a jacking mechanism, is applied to three-dimensional printer, its characterized in that, jacking mechanism includes the thimble board, the thimble board include the plate body with install in a plurality of thimbles of plate body, the plate body has the middle part regional with be located the regional region all around of middle part, it is a plurality of the thimble distribute in the middle part is regional with regional all around, it is a plurality of the height of thimble certainly the middle part is regional court regional degressive all around.
2. The jacking mechanism of claim 1, wherein the tips of said plurality of said pins are each located on a parabola that opens toward said plate body.
3. The jacking mechanism as claimed in claim 2, wherein said ejector pin located at the center of said central region is a first ejector pin, and a height h of each of said ejector pins at either side of said first ejector pin in a lateral direction satisfies the following relationship: h is ax 2 + c; wherein x is the distance between each thimble and the first thimble, and the unit of x is millimeter; the value interval of a is [ 0.005 ] to [ 0.001 ], and the value interval of c is [ 15 ] to [ 20 ].
4. The jacking mechanism as claimed in claim 3, wherein in a circumferential direction of said first pin, heights of a plurality of pins equally spaced from said first pin decrease in a circumferential direction of said first pin.
5. The jacking mechanism of claim 3, wherein a highest one of said plurality of pins is a second pin, and a spacing between said second pin and said first pin is greater than 0 and less than or equal to 200 mm.
6. The jacking mechanism as claimed in any one of claims 1 to 5, wherein a plurality of said ejector pins are equally spaced on said plate body.
7. The jacking mechanism as claimed in claim 6, wherein the difference in height between two adjacent said thimbles is from 3mm to 5 mm.
8. A jacking mechanism as claimed in any one of claims 1 to 5, wherein said jacking mechanism includes at least two said ejector plates, said at least two ejector plates being jogged with one another in the length direction and/or width direction of said plate body.
9. The jacking mechanism as claimed in any one of claims 1 to 5, further comprising a partition plate, said partition plate being detachably mounted to said ejector plate, said partition plate defining a plurality of through holes for said ejector pins to pass through, such that said partition plate is connected to one end of said plate body adjacent to said ejector pins.
10. A three-dimensional printer comprising a holding plate, a hopper, a printing platform and the jacking mechanism of any one of claims 1 to 9; the printing platform is connected with the fixed plate in a sliding mode in a direction perpendicular to the bottom of the trough, and the printing platform is used for bearing a formed workpiece; the ejection mechanism is arranged at the bottom of the trough, and when the printing platform moves towards the bottom of the trough, an ejector pin of the ejection mechanism penetrates through the printing platform and ejects the formed workpiece.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210568471.7A CN115008752A (en) | 2022-05-23 | 2022-05-23 | Jacking mechanism and three-dimensional inkjet printer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210568471.7A CN115008752A (en) | 2022-05-23 | 2022-05-23 | Jacking mechanism and three-dimensional inkjet printer |
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