CN210706047U - Large-size warping-preventing easy-to-take polymer three-dimensional printing bottom plate - Google Patents
Large-size warping-preventing easy-to-take polymer three-dimensional printing bottom plate Download PDFInfo
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- CN210706047U CN210706047U CN201921630846.8U CN201921630846U CN210706047U CN 210706047 U CN210706047 U CN 210706047U CN 201921630846 U CN201921630846 U CN 201921630846U CN 210706047 U CN210706047 U CN 210706047U
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Abstract
The utility model discloses a three-dimensional printing bottom plate of anti-warping easy-to-take polymer of jumbo size, it is provided with a plurality of dovetail grooves along its length direction or width direction to print the bottom plate, adopts dovetail groove (narrow on top wide down), packs the dovetail groove with the printing material before printing for printing and dovetail groove packing material consolidation are a whole, and the trapezoidal material in the dovetail groove can effectively fix the printing, restrain its deformation, and is obvious to the printing effect of jumbo size finished piece, avoids the power loss of bottom plate heating simultaneously; the printing bottom plate does not need to be heated before printing, so that the energy is saved and the environment is protected; the warping of the large-size plastic part in the printing process can be effectively prevented; after printing is finished, the printing piece and the printing substrate are made of different materials, so that the connecting part has no adhesion and material sticking risks, and the printing piece with a large size is convenient to take down from the substrate; the mechanism is anti-warping, is not restricted by printing material kind, and the structural reliability is high.
Description
[ technical field ] A method for producing a semiconductor device
The utility model belongs to the technical field of the vibration material disk makes, concretely relates to piece polymer three-dimensional printing bottom plate is easily got in proof warp of jumbo size.
[ background of the invention ]
Fused Deposition Modeling (FDM) is a widely used 3D printing technique for polymers. In this additive manufacturing technique, a plastic polymer is heated to melt and is piled up and adhered to a predetermined printing position in the form of a melt, and a printed product is finally piled up and adhered and molded from the melt one by one.
In the process, shrinkage deformation can be generated in the polymer cooling and hardening process, and due to the fact that temperatures of all parts are different and shapes are uneven in the printing process, the generated shrinkage deformation is not synchronous and uniform, and when the shrinkage deformation generated in the printing part is larger than the bonding force between the printing part and the bottom plate, the part can fall off from the part of the printing bottom plate to generate warping deformation.
The larger the product size is, the more obvious the warpage is, the warped product can even interfere the movement of the printer nozzle to cause that the printing can not be continued, so that the FDM technology is difficult and serious in the application of the rapid forming of large-size parts, and the popularization and application of the FDM technology are hindered.
Therefore, technicians generally suppress the occurrence of warp deformation by applying a high-temperature-resistant plastic film to the printing substrate, applying a water-soluble glue, raising the heating temperature of the printing substrate, and the like. However, these measures are effective for small-sized printed products or materials with low shrinkage per se, but have a limited effect for large-sized products (molded sizes greater than 2m) or materials with relatively large shrinkage deformation.
[ Utility model ] content
The utility model aims to overcome the defects of the prior art and provide a large-size warp-proof easy-to-take polymer three-dimensional printing bottom plate; the method is used for solving the problem that when a large-size workpiece is manufactured by an FDM technology, the workpiece is easy to fall off from the part of a printing bottom plate and warp.
In order to achieve the above purpose, the utility model adopts the following technical scheme to realize:
a three-dimensional printing bottom plate of a large-size warping-preventing easy-to-take polymer comprises: the printing substrate is provided with M trapezoidal grooves along the length direction or the width direction of the upper surface of the printing substrate, all the trapezoidal grooves are parallel to each other, and M is a natural number not less than 2; the width of the trapezoid groove on the upper surface of the printing substrate is smaller than the width of the trapezoid groove inside the printing substrate, and the printing substrate is made of metal.
The utility model discloses a further improvement lies in:
preferably, M is 5, and the distances between adjacent trapezoidal grooves are equal.
Preferably, the length of the printing substrate along the trapezoidal groove array direction is set to be D, one side edge of the printing substrate is set to be a reference side edge, and the vertical distances between the center line of the 5 trapezoidal grooves along the length direction of the printing substrate and the reference side edge are respectively 10% D, 30% D, 50% D, 70% D and 90% D.
Preferably, the number of the trapezoidal grooves used in the printing process is 2 or 3.
Preferably, in the printing process, when 2 trapezoidal grooves are used, the 2 trapezoidal grooves are respectively the trapezoidal grooves closest to two sides of the printed piece, and the two trapezoidal grooves are arranged at the lower part of the printed piece;
when 3 trapezoid-shaped grooves are used, the trapezoid-shaped grooves on the two sides are respectively the trapezoid-shaped grooves closest to the two sides of the printed matter, and the central line of the middle trapezoid-shaped groove along the length direction is spatially superposed with the central line of the printed matter; the trapezoidal grooves of the two side parts are arranged at the lower part of the printed piece.
Preferably, the bottom of the trapezoidal groove is provided with a guide rail along the length direction of the trapezoidal groove, and a trapezoidal sleeve is fixedly arranged on the guide rail.
Preferably, the guide rail is a ball guide rail; the trapezoidal sleeve and the guide rail are connected in a threaded manner.
Preferably, the included angle between the side edge of the trapezoidal sleeve and the bottom edge of the trapezoidal sleeve is β1The included angle between the side edge of the trapezoidal groove and the bottom edge of the trapezoidal groove is β2，β1＝β2(ii) a The width of the upper end of the trapezoidal sleeve is larger than the diameter of the nozzle of the printing head, and the width of the upper end of the trapezoidal sleeve is the same as that of the nozzle of the printing headSmaller than the diameter of the bottom surface of the print head nozzle.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model discloses a three-dimensional printing bottom plate of anti-warping easy-to-take polymer of jumbo size, it is provided with a plurality of dovetail grooves along its length direction or width direction to print the bottom plate, adopts dovetail groove (narrow on top wide down), packs the dovetail groove with the printing material before printing for printing and dovetail groove packing material consolidation are a whole, and the trapezoidal material in the dovetail groove can effectively fix the printing, restrain its deformation, and is obvious to the printing effect of jumbo size finished piece, avoids the power loss of bottom plate heating simultaneously; the printing bottom plate does not need to be heated before printing, so that the energy is saved and the environment is protected; the warping of the large-size plastic part in the printing process can be effectively prevented; after printing is finished, the printing piece and the printing substrate are made of different materials, the difference of expansion coefficients enables the connecting part to have no adhesion and material sticking risks, and the printing piece with large size is convenient to take down from the substrate; the mechanism is anti-warping, is not restricted by printing material kind, and the structural reliability is high.
Furthermore, the number of the trapezoidal grooves is 5, and the distances between the adjacent trapezoidal grooves are equal; the trapezoidal grooves are formed in too many numbers, so that the integral rigidity of the printing substrate is easily damaged; the number of the trapezoidal grooves is too small, so that the size of the applicable printed piece is small; the distances between the adjacent trapezoidal grooves are equal, so that the printed material in the trapezoidal grooves can give uniform fixing force to a printed part in the printing process.
Further, not only the distance between the adjacent dovetail groove equals, along the array direction in dovetail groove, all dovetail grooves will print the base plate partition for in-process of printing, the base plate can be evenly printed and born the power that is dragged.
Furthermore, in the printing process, the number of the used trapezoidal grooves is 2 or 3, two trapezoidal grooves are edge parts, and one trapezoidal groove is middle; the two side parts are used for ensuring that the side part which is most easy to warp does not warp, and the middle part is used for providing uniform fixing force; if the number of the used trapezoidal grooves exceeds 4, the printed matter is not easy to remove when being removed from the printing substrate.
Furthermore, the bottom surface of the trapezoidal groove is provided with a slide rail, so that the printed workpiece can integrally slide out of the printing platform to finish taking the workpiece; the guide rail is provided with a trapezoidal sleeve, a printed piece is bonded with a printed material in the trapezoidal sleeve, and the printed piece is easy to separate from the trapezoidal sleeve by means of the slide rail.
Furthermore, the guide rail is preferably a ball guide rail, the sliding property of the ball guide rail is good, and the printed piece is easy to move out of the printing substrate; the preferred threaded connection of mode of connection of trapezoidal cover and guide rail makes things convenient for the dismantlement and the clearance of trapezoidal cover.
Furthermore, the side of the trapezoid sleeve is tightly attached to the side of the trapezoid groove, the width of the upper end of the trapezoid sleeve is larger than the diameter of the nozzle of the printing head, the trapezoid sleeve can be filled with the printing material in the filling process, and no redundant material enters a gap between the trapezoid sleeve and the printing substrate.
[ description of the drawings ]
Fig. 1 is a three-dimensional structure diagram of a printing bottom plate of the utility model;
fig. 2 is a top view of the printing substrate of the present invention;
fig. 3 is a side view of the printing plate of the present invention;
FIG. 4 is a cross-sectional view of a print shoe A-A cross-section of the present invention;
FIG. 5 is a detail view at B;
fig. 6 is a bottom view of the nozzle.
Wherein: 1-printing a substrate; 2-a trapezoidal sleeve; 3-screws; 4-a guide rail; 5-end fixing lock; 6-guide ball; 7-a trapezoidal groove; 8-a nozzle; 9-nozzle.
[ detailed description ] embodiments
The present invention will be described in further detail with reference to the accompanying drawings:
in the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly and encompass, for example, both fixed and removable connections; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The utility model discloses a large-size warp-proof easy-to-take polymer three-dimensional printing bottom plate; the bottom plate is mainly used for improving the bonding force between a printed piece and the substrate by adding the trapezoidal groove on the bottom plate, and preventing the printed piece from warping in the printing process; the printing device comprises a printing substrate 1, a trapezoidal sleeve 2, a screw 3, a guide rail 4, an end fixing block 5, a guide rail ball 6 and a trapezoidal groove 7.
Referring to fig. 1 and 2, the device is provided with a plurality of trapezoidal grooves 7 on a printing substrate 1 along the length direction or the width direction, all the trapezoidal grooves 7 on the printing substrate 1 are parallel to each other, and the distances between the adjacent trapezoidal grooves 7 are equal; the trapezoidal groove 7 is parallel to the length direction or the width direction of the print substrate 1, and the trapezoidal groove 7 penetrates the entire surface of the print substrate 1 in the length direction or the width direction of the print substrate 1. Assuming that the trapezoidal grooves 7 are parallel to the width direction, all the trapezoidal grooves 7 are arrayed in the length direction, the number of the trapezoidal grooves 7 is preferably set to 5, any one of the wide sides of the printing substrate 1 is set as a reference side, the length of the printing substrate 1 in the length direction is set to D, the trapezoidal groove closest to the reference side is the first trapezoidal groove 7, the center line of the first trapezoidal groove 7 in the length direction thereof is 10% D from the reference side, the center line of the second trapezoidal groove 7 in the length direction thereof is 30% D from the reference side, the center line of the third trapezoidal groove 7 in the length direction thereof equally divides the length direction of the printing substrate 1, the center line of the fourth trapezoidal groove in the length direction thereof is 70% D from the reference side, and the center line of the fifth trapezoidal groove in the length direction thereof is 90% D from the reference side. It is assumed that the trapezoidal groove 7 is parallel to the width direction, and if the trapezoidal groove 7 is parallel to the length direction, the same applies.
In the printing process, in order to prevent the final piece taking difficulty, the using number of the trapezoidal grooves 7 is 2-3, and the using number of the trapezoidal grooves 7 is determined according to the size of a printed piece and the distance between the printing trapezoidal grooves 7; specifically, the following three cases are classified:
(1) if the length span of the printed matter is larger than the distance between the two trapezoidal grooves 7 but smaller than the distance between the three trapezoidal grooves 7, the requirement of fixing and preventing the edge of the printed matter from warping can be met by using the two trapezoidal grooves 7, and the center line of the printed matter is superposed with the bisector between the two trapezoidal grooves 7.
(2) If the length span of the printed matter is larger than the distance between the three trapezoidal grooves 7, the center line of the printed matter and the center line of the middle trapezoidal groove 7 spatially coincide using three adjacent trapezoidal grooves 7.
(3) If the length span of the printed matter is larger than the distance between the N trapezoidal grooves 7, and N is a natural number which is more than or equal to 5, the most middle trapezoidal groove 7 and the trapezoidal grooves 7 which are closest to the two side edges of the printed matter are used; the distance between the two trapezoidal grooves 7 on the edge part is less than or equal to the length of the printed piece, namely, the two trapezoidal grooves 7 on the edge part are completely covered by the printed piece in the printing process, so that the printed material in the trapezoidal grooves 7 can be adhered to the printed piece.
From the above description, it can be seen that in any form, the two trapezoidal grooves 7 closest to the two side edges of the printed material are needed to ensure that the edge portion most prone to warp does not warp. On the other hand, when the width of the bottom surface of the printed matter covers more than 4 trapezoidal grooves 7, the internal trapezoidal grooves 7 are required to be sealed by using a metal plate before printing, so that the number of the trapezoidal grooves 7 bonded with the bottom surface of the printed matter is not more than 3, and the difficulty in taking the printed matter is avoided.
Referring to fig. 3 and 4, the inner bottom of the trapezoidal groove 7 is provided with a guide rail 4 along the length direction thereof, the guide rail 4 is preferably a ball guide rail, and referring to fig. 5, the balls in the guide rail 4 are arranged in the printing substrate 1; the guide rail 4 can enable the printed piece to slide out of the guide rail 4 after printing is finished, and the problem that the printed piece with large size is not suitable for taking the printed piece after printing is finished is solved. The guide rail 4 is fixedly provided with a trapezoidal sleeve 2 along the length direction of the guide rail, the section of the trapezoidal sleeve 2 is trapezoidal, the bottom edge of the trapezoidal sleeve 2 is fixedly arranged on the guide rail 4, the included angle between the two side edges and the bottom edge is the same as the included angle between the side edge of the trapezoidal groove 7 and the bottom of the trapezoidal groove 7, the side edge part of the trapezoidal sleeve 2 can be completely attached and arranged in the trapezoidal groove 7, and meanwhile, the upper end face of the trapezoidal sleeve 2 is flush with the upper end face of the trapezoidal groove 7; when the trapezoid sleeve 2 is filled with the material, no redundant material enters a gap between the trapezoid sleeve 2 and the printing substrate 1; the fixing mode of the trapezoid sleeve 2 and the printing substrate 1 is preferably a screw 3 fixing mode, and more preferably a countersunk screw fixing mode.
Referring to fig. 3 and 4, the width of the upper end of the trapezoidal sleeve 2 is larger than the diameter of the printing head nozzle 9 and smaller than the diameter of the bottom surface of the printing head nozzle 8; referring to fig. 6, the bottom surface of any one nozzle 8 is provided with a nozzle 8 for material, and the width of the upper end of the trapezoidal sleeve 2 is larger than the diameter of the nozzle 9, so that the material is prevented from entering a gap between the trapezoidal sleeve 2 and the printing substrate 1 when the material is filled in the trapezoidal sleeve 2, and difficulty in taking the material is avoided.
Referring to fig. 3, end fixing locks 5 are fixedly arranged at both ends of each trapezoidal groove 7 (in the figure, only one trapezoidal groove 7 at the edge is shown for the purpose of showing the structure of the end of the trapezoidal groove 7); two sides of one end part of any trapezoidal groove 7 are respectively provided with an end part fixing lock 5, one end of each end part fixing lock 5 is fixedly arranged on the printing substrate 1, and the other end of each end part fixing lock 5 is detachably arranged at the end part of the guide rail 4; one end of each guide rail 4 is provided with two end fixing locks 5 to prevent the guide rails 4 from sliding in the printing process, and when the printing is finished, the end fixing locks 5 are detached from the ends of the guide rails 4 to enable the guide rails 4 to slide out; the end fixing lock 5 can be a latch structure.
Before filling, a layer of coating is coated on the inner surface of the trapezoidal sleeve 2 arranged on the guide rail 4 for anti-sticking treatment, so that materials are prevented from being bonded with the trapezoidal sleeve 2, the difficulty in taking out the parts is avoided, and the coating can be a polytetrafluoroethylene coating.
The process of additive manufacturing a print by FDM technique using this printing substrate 1 includes the steps of:
(1) determining a trapezoidal groove 7 to be used according to the size of a printed matter;
(2) covering the trapezoidal groove 7 which is not needed by using a metal plate;
(3) filling the trapezoid sleeve 2 in the used trapezoid groove 7 with a printed material, wherein the upper surface of the printed substrate 1 is a plane after the filling is finished;
(4) printing is started on the printing substrate 1 by the FDM technique, and when the first layer is printed, the angle between the printing direction of the print head and the center line of the trapezoidal groove 7 in the longitudinal direction is α, 0 ° < α ≦ 90 °, and preferably α ≦ 90 °.
(5) Printing of the second layer … continues on the first layer until the entire print is printed.
The method comprises the steps of firstly determining a trapezoidal groove to be used, fixedly covering a metal plate on the unused trapezoidal groove, then filling a printed material in the used trapezoidal groove, printing by an FDM technology, wherein an included angle is formed between a printing direction and the center line of the trapezoidal groove along the length direction when a first layer is printed, so that a bonding point is ensured between the printed first layer and the printed material in the trapezoidal groove, if the printing direction is parallel to the center line of the trapezoidal groove along the length direction, the printed material on a part of a printed channel is not in contact with the printed material in the trapezoidal groove, the effect of connecting a printing bottom plate and a printed piece cannot be realized, and the effect of preventing the warping phenomenon cannot be realized.
Preferably, the inner surface of the trapezoidal groove is subjected to anti-sticking treatment before printing, so that materials are prevented from being bonded with the trapezoidal sleeve, the final piece taking is facilitated, and the included angle α is preferably 90 degrees, so that the maximum bonding force is ensured.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A three-dimensional printing bottom plate of a polymer of warpage proof easily got of jumbo size, its characterized in that includes: the printing substrate (1), the upper surface of the printing substrate (1) is provided with M trapezoidal grooves (7) along the length direction or the width direction, all the trapezoidal grooves (7) are parallel to each other, and M is a natural number not less than 2; the width of the trapezoid groove (7) on the upper surface of the printing substrate (1) is smaller than the width of the printing substrate (1) inside, and the printing substrate (1) is made of metal.
2. The three-dimensional printing bottom plate of large-size warp-proof easy-to-take polymer as claimed in claim 1, wherein M is 5, and the distances between adjacent trapezoidal grooves (7) are equal.
3. The large-size warpage-preventing easy-to-take polymer three-dimensional printing bottom plate as claimed in claim 2, wherein the length of the printing substrate (1) along the array direction of the trapezoidal grooves (7) is set to be D, and the perpendicular distances between the center line of the 5 trapezoidal grooves (7) along the length direction thereof and the reference side are respectively 10% D, 30% D, 50% D, 70% D and 90% D, with one side of the printing substrate (1) as the reference side.
4. The three-dimensional printing bottom plate of large-size warp-proof easy-to-take polymer as claimed in claim 1, wherein the number of the trapezoidal grooves (7) used in the printing process is 2 or 3.
5. The three-dimensional printing bottom plate of the large-size warping-proof easy-to-take part polymer as claimed in claim 4, wherein during printing, when 2 trapezoidal grooves (7) are used, the 2 trapezoidal grooves (7) are respectively the trapezoidal grooves (7) closest to two sides of the printed part, and the two trapezoidal grooves (7) are arranged at the lower part of the printed part;
when 3 trapezoidal grooves (7) are used, the trapezoidal grooves (7) on the two sides are respectively the trapezoidal grooves (7) closest to the two sides of the printed matter, and the central line of the middle trapezoidal groove (7) in the length direction is spatially superposed with the central line of the printed matter; the trapezoidal grooves (7) of the two side parts are arranged at the lower part of the printed piece.
6. The large-size warping-preventing easy-to-take piece polymer three-dimensional printing bottom plate according to claim 1, wherein a guide rail (4) is arranged at the bottom of the trapezoidal groove (7) along the length direction of the trapezoidal groove, and a trapezoidal sleeve (2) is fixedly arranged on the guide rail (4).
7. The large-size warpage-preventing polymer three-dimensional printing bottom plate as claimed in claim 6, wherein the guide rail (4) is a ball guide rail; the trapezoidal sleeve (2) and the guide rail (4) are connected in a threaded manner.
8. The large-size warpage-preventing easy-taking polymer three-dimensional printing bottom plate as claimed in claim 6, wherein the included angle between the side edge of the trapezoidal sleeve (2) and the bottom edge of the trapezoidal sleeve (2) is β1The included angle between the side edge of the trapezoidal groove (7) and the bottom edge of the trapezoidal groove (7) is β2，β1＝β2(ii) a The width of the upper end of the trapezoid sleeve (2) is larger than the diameter of the printing head nozzle (9) and smaller than the diameter of the bottom surface of the printing head nozzle (8).
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| CN201921630846.8U CN210706047U (en) | 2019-09-27 | 2019-09-27 | Large-size warping-preventing easy-to-take polymer three-dimensional printing bottom plate |
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| CN201921630846.8U CN210706047U (en) | 2019-09-27 | 2019-09-27 | Large-size warping-preventing easy-to-take polymer three-dimensional printing bottom plate |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110481013A (en) * | 2019-09-27 | 2019-11-22 | 西安增材制造国家研究院有限公司 | A kind of easy pickup polymer three-dimensional printing bottom plate of large scale warpage preventing and Method of printing |
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2019
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110481013A (en) * | 2019-09-27 | 2019-11-22 | 西安增材制造国家研究院有限公司 | A kind of easy pickup polymer three-dimensional printing bottom plate of large scale warpage preventing and Method of printing |
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