Platform device suitable for 3D printing and manufacturing process of upper printing plate thereof

Abstract

The present invention discloses a platform device suitable for 3D printing and a manufacturing process of an upper printing plate thereof, wherein the platform device comprises a lower bottom plate and an upper printing plate, the upper printing plate comprises a composite wood board layer, and at least one printing layer is provided on the upper surface of the composite wood board layer; wherein the manufacturing process of the upper printing plate comprises: S1, selecting a corresponding number of composite wood boards for splicing to form a composite wood board layer; S2, then evenly spreading them on the composite wood board layer with a sieve; S3, using a leveling scraper and a vibrating air hammer to evenly knock and flatten the granular materials spread on the composite wood board layer; S4, spraying the resin instant glue evenly on the laid granular materials through a spray head; S5, the upper printing plate is formed after the resin instant glue is completely dried. The present invention does not need to be heated, can be well fixed to the printing material as a whole, can effectively prevent warping, and can meet the printing requirements of various temperatures and various volumes, and has low cost and a wide range of use.

Description

Technical Field

[0001] The present invention relates to the field of 3D printing of FDM (fused deposition modeling), and in particular to a platform device suitable for 3D printing and a manufacturing process of an upper printing plate thereof. Background Art

[0002] 3D printing is a technology that uses digital model files as the basis, using powdered metal or plastic and other bondable materials to construct objects by printing layer by layer. FDM technology is the most commonly used technology in 3D printing using plastic as raw material.

[0003] The printing material is generally extruded onto the platform device through an extrusion device of the 3D printing device. The platform device includes a lower base plate and an upper printing plate. The lower base plate is generally a steel plate, and the upper printing plate is arranged on the lower base plate. The printing material extruded by the extrusion device will flow into the upper printing plate and be fixed as a whole with the upper printing plate.

[0004] When the printing material is extruded at high temperature and undergoes heat exchange with the outside world to release thermal stress, it will produce uncertain warping, thus affecting the final printing quality and accuracy.

[0005] In the prior art, the following two methods are generally used to solve the above-mentioned warping problem:

[0006] 1. The upper printing plate is made of a polyester platform plate, and a heating plate is set on the lower bottom plate. The platform plate is heated by the heating plate, so that the platform plate and the printing material are fully bonded together, and the adhesion is very strong, which can effectively prevent warping. However, when the printing device is used for large and super-large components, a set of large heating plates and polyester platform plates of matching sizes need to be designed accordingly, and the power consumption demand is quite high. In addition, the cost of the polyester platform plate is also very high, and it takes a long time to customize and purchase, which increases the printing cost in disguise.

[0007] 2. The upper printing plate is made of masking paper and ordinary glue sticks and fixed to the lower base plate by bonding. However, this structure is generally only suitable for the anti-warping process of relatively low-temperature printing materials (such as PLA, etc.). For example, when used for printing nylon and ABS, the warping force will be much greater than the bonding force between the printing material and the cold-treated base plate due to the excessive printing heat, and the cost is also high. Summary of the invention

[0008] In order to solve the above problems, the present invention provides a platform device suitable for 3D printing and a manufacturing process of an upper printing plate thereof.

[0009] To achieve the above object, the technical solution of the present invention is as follows:

[0010] A platform device suitable for 3D printing, the platform device comprising a lower base plate and an upper printing plate, the upper printing plate comprising a composite wood layer, at least one printing layer is provided on the upper surface of the composite wood layer, and the printing material extruded by the extrusion device of the printer can be directly fixed to the printing layer as a whole without heating.

[0011] By adopting the above technical solution, the present application can be well fixed to the printing material without heating, can effectively prevent warping, and can meet the printing requirements of various temperatures.

[0012] In a preferred embodiment of the present invention, the printing layer includes a glue layer and a granular material layer, and the granular material layer is composed of a plurality of granular materials of the same specification or type as the printing material.

[0013] By adopting the above technical solution, the connection firmness between the printing material and the upper printing plate can be improved.

[0014] In a preferred embodiment of the present invention, the glue layer is a resin instant glue layer, and the composite wood board layer is formed by splicing a plurality of independent composite wood boards.

[0015] By adopting the above technical solution, the cost can be reduced, and the requirements of various printing volumes can be met, thereby increasing the scope of application.

[0016] In a preferred embodiment of the present invention, the upper printing plate is detachably arranged on the lower base plate.

[0017] By adopting the above technical solution, the upper printing plate can be easily replaced.

[0018] In a preferred embodiment of the present invention, an adjusting structure is provided on the lower bottom plate, and the upper printing plate is detachably arranged on the adjusting structure, and the adjusting structure can drive the upper printing plate to move up and down.

[0019] By adopting the above technical solution, the height of the platform device can be adjusted to meet the requirements of various printing heights.

[0020] In a preferred embodiment of the present invention, a plurality of support columns are provided at the bottom of the lower base plate, a plurality of groups of through holes are provided on the lower base plate, each group of through holes consists of a first through hole and a second through hole located on the same horizontal line, the first through hole is located on the left side of the lower base plate, and the second through hole is located on the right side of the lower base plate, the adjustment structure is located at the bottom of the lower base plate, the adjustment structure includes a plurality of first lifting cylinders and a plurality of second lifting cylinders, the telescopic end of each first lifting cylinder passes through a first through hole correspondingly, the telescopic end of each second lifting cylinder passes through a second through hole correspondingly, a rectangular connecting block is respectively provided at the top end of the telescopic end of each first lifting cylinder and the top end of the telescopic end of each second lifting cylinder, a threaded connecting groove is provided on the upper surface of the rectangular connecting block, and a plurality of connecting holes are respectively provided on both sides of the upper printing plate, each connecting hole corresponds to a first through hole or a third through hole.

[0021] By adopting the above technical solution, the adjustment structure is simple and practical, easy to install, and the cost is reduced.

[0022] In a preferred embodiment of the present invention, the adjustment structure also includes a plurality of third lifting cylinders, the lower base plate is also provided with a plurality of third through holes, and each third through hole is located on the same horizontal line as a group of through holes, the telescopic end of each third lifting cylinder passes through a corresponding third through hole, and a hemispherical connecting block is provided at the top of the telescopic end of each third lifting cylinder, and the arc surface of the hemispherical connecting block contacts the lower surface of the upper printing plate.

[0023] By adopting the above technical solution, the adjustment structure can also adjust the horizontal angle of the upper printing plate, thereby improving the printing accuracy.

[0024] In a preferred embodiment of the present invention, the platform device further comprises a controller, and the controller is respectively connected to each first lifting cylinder, each second lifting cylinder and each third lifting cylinder.

[0025] By adopting the above technical solution, the adjustment structure is easy to operate, and only one controller is needed to simultaneously control the operation of each first lifting cylinder or each second lifting cylinder or each third lifting cylinder.

[0026] In a preferred embodiment of the present invention, the platform device further comprises a plurality of infrared distance sensors, which are respectively arranged on four sides of the composite wood board layer and connected to the controller.

[0027] By adopting the above technical solution, the distance between the upper printing plate and the extruder can be detected in real time, which facilitates the correction of the height and horizontal angle of the upper printing plate and improves the printing accuracy.

[0028] In addition, the present invention also provides a manufacturing process of the upper printing plate, which comprises:

[0029] S1, according to the printing volume requirement, select a corresponding number of composite wood boards and splice them to form a composite wood board layer, and the thickness of the composite wood board layer is at least 30 cm;

[0030] S2, prepare granular materials of the same specifications or types as the printing materials, and then spread them evenly on the composite wood board layer using a sieve;

[0031] S3, using a leveling scraper and a vibrating air hammer to evenly knock and level the granular materials spread on the composite wood layer, so that each granular material lies evenly on the composite wood layer;

[0032] S4, select matching resin instant glue according to the paved granular materials and spray the resin instant glue evenly on the paved granular materials through the spraying head. When spraying, the spraying force and flow rate should be controlled to prevent excessive flow rate from destroying the previously evenly laid granular materials;

[0033] S5, wait for 3-4 hours, and the upper printing plate will be formed after the resin instant glue is completely dry.

[0034] By adopting the above technical solution, the manufacturing cost of the upper printing plate is very low and it is easy to manufacture, and it can be manufactured by only using a few very low-priced commonly used materials.

[0035] In addition, the upper printing plate can be manufactured into a corresponding volume according to the actual printing volume requirements, which can meet the requirements of various printing volumes.

[0036] The beneficial effects of the present invention are:

[0037] The invention can be well fixed with the printing material without heating, can effectively prevent warping, can meet the printing requirements of various temperatures and various volumes, and has low cost and a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0039] Figure 1 It is a structural schematic diagram of Example 1;

[0040] Figure 2 It is a structural schematic diagram of Example 2;

[0041] Figure 3 for Figure 2 A magnified image of area A;

[0042] Figure 4 This is a working principle diagram of Example 2.

[0043] Figure numerals: 100, lower base plate; 110, support column; 200, upper printing plate; 210, composite wood layer; 220, printing layer; 221, glue layer; 222, granular material layer; 310, first lifting cylinder; 320, second lifting cylinder; 330, third lifting cylinder; 410, rectangular connecting block; 420, hemispherical connecting block; 500, screw; 600, controller; 700, infrared distance sensor. DETAILED DESCRIPTION

[0044] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below.

[0045] Example 1

[0046] See also Figure 1 The platform device suitable for 3D printing provided in this embodiment includes a lower base plate 100 and an upper printing plate 200.

[0047] The lower base plate 100 has the same structure as the existing one, and can be specifically a rectangular steel plate, which is used to install the upper printing plate 200 .

[0048] The upper printing plate 200 is mounted on the upper surface of the lower base plate 100. The printing material extruded by the extruder on the 3D printing device can flow into the upper surface thereof and be directly fixed to the upper printing plate 200 as a whole without heating. In this way, the present embodiment can be well fixed to the printing material as a whole without heating, can effectively prevent warping, and can meet the printing requirements of various temperatures.

[0049] The upper printing board 200 includes a composite wood layer 210 and at least one printing layer 220 .

[0050] The composite wood layer 210 is disposed on the upper surface of the lower base plate 100 and serves as a carrier of the printing layer 220 .

[0051] The composite wood board layer 210 can be specifically formed by splicing a number of independent composite wood boards, which not only reduces the cost but also allows the corresponding number of composite wood boards to be selected for splicing according to the actual printing volume, so that this embodiment can meet the needs of various printing volumes.

[0052] The splicing method between the composite wood boards is the existing technology, such as gluing, screwing, plugging, etc.

[0053] The printing layer 220 is used to be directly integrated with the printing material fixing body and has very high firmness. The number of the printing layer 220 can be determined according to actual needs, such as the thickness of the printing material. If the thickness of the printing material increases, the number of the printing layer 220 must also increase accordingly, so as to improve the firmness between the printing material and the printing material.

[0054] The printing layer 220 may specifically consist of a glue layer 221 and a granular material layer 222 . The granular material layer 222 specifically consists of a plurality of granular materials of the same specification or type as the printing material. The glue layer 221 specifically is a resin instant glue layer.

[0055] In this way, each granular material of the granular layer 222 can be directly fixed on the upper surface of the composite wood board layer 210 through the glue layer 221. When the printing material flows into the printing layer 220, due to the high temperature of the printing material and the good heat insulation performance of the composite wood board layer 210, the temperature of the printing material will cause the glue layer 221 to melt. After the glue layer 221 melts, the printing material and the granular materials on the granular layer 222 will be bonded together, thereby making the printing material and the printing layer 220 directly bonded together. In addition, since the granular materials on the granular layer 222 are of the same specification or type as the printing material, the firmness is very high.

[0056] In addition, the lower bottom plate 100 and the upper printing plate 200 can be connected in a detachable manner. Specifically, a plurality of screw holes corresponding to each other can be respectively opened on the lower bottom plate 100 and the upper printing plate 200, and then the lower bottom plate 100 and the upper printing plate 200 can be installed by passing screws through the screw holes. Moreover, the disassembly is also very convenient, and only the screws need to be removed from the screw holes. In this way, the corresponding upper printing plate 200 can be replaced according to printing materials of different specifications or types in this embodiment, thereby improving the scope of use.

[0057] The present embodiment further provides a manufacturing process of the upper printing plate 200, which includes:

[0058] S1, according to the printing volume requirement, select a corresponding number of composite wood boards and splice them to form a composite wood board layer 210, the thickness of the composite wood board layer is at least 30 cm;

[0059] S2, preparing granular materials of the same specification or type as the printing material, and then evenly spreading them on the composite wood board layer 210 using a sieve;

[0060] S3, using a leveling scraper and a vibrating air hammer to evenly knock and level the granular materials spread on the composite wood board layer 210, so that each granular material lies evenly on the composite wood board layer 210;

[0061] S4, select matching resin instant glue according to the paved granular materials and spray the resin instant glue evenly on the paved granular materials through the spraying head. When spraying, the spraying force and flow rate should be controlled to prevent excessive flow rate from destroying the previously evenly laid granular materials;

[0062] S5, waiting for 3-4 hours, the resin instant glue is completely dried to form the upper printing plate 200.

[0063] In addition, if the number of printed layers 220 is greater than one, each time a layer is added, the above S2-S4 can be repeated after S5, except that the object of scattering the granular material in S2 is changed to the previous printed layer 220 instead of the composite wood board layer 210.

[0064] Furthermore, when the printed layer 220 is damaged, the above-mentioned S2-S4 can be used to repair it, so that the printed layer 220 can be reused, reducing the cost.

[0065] The upper printing plate 200 manufactured by the above process has a very low cost and is easy to manufacture because the above printing layer 220 is only composed of common and low-cost granular materials and resin glue.

[0066] In addition, the above-mentioned printing layer 220 only needs to select the corresponding amount of particles and resin glue according to the printing volume requirements and lay it on the composite wood board layer 210, so that the upper printing board 200 can meet various printing volume requirements.

[0067] Furthermore, since the print layer 220 is formed by melting the glue layer 221 due to the temperature of the print material, thereby bonding the print material and the granular layer 222 together, this embodiment does not require a heating plate to be provided on the lower base plate 100 to heat the print layer 220, and can meet printing requirements of various temperatures.

[0068] The following is the specific application of this embodiment:

[0069] The ultra-large volume 3D printing used for the landscape bridge and the smaller volume 3D printing used for the 5-meter bridge respectively, in the actual printing process, the bonding effect between the printing material and the upper printing plate 200 is very ideal, and in the process of releasing the thermal stress when the temperature of the printing material drops from 230°C when it is extruded to 0°C, there is no obvious detachment from the bottom, so the firmness is very high.

[0070] The following is a table of mechanical properties test of the sample strip after printing by the 3D printer using this embodiment:

[0071]

[0072] In the above table, samples 1 and 2 are the bending strengths in the xy direction, and samples 3 and 4 are the bending strengths in the z direction. Both the bending strengths in the xy direction and the bending strengths in the z direction are higher than the strengths of the splines printed by the platform device in the prior art, so this embodiment also improves the strength of the printed product.

[0073] Example 2

[0074] See also Figure 2 and Figure 3 The platform device suitable for 3D printing provided in this embodiment includes a lower base plate 100, an upper printing plate 200 and an adjustment structure.

[0075] The lower base plate 100 has the same structure as the existing one, and can be specifically a rectangular steel plate, which is used to install the upper printing plate 200 .

[0076] The upper printing plate 200 is mounted on the adjustment structure. The printing material extruded by the extruder on the 3D printing device can flow into its upper surface and be directly fixed to the upper printing plate 200 without heating. In this way, the embodiment does not need heating and can be well fixed to the printing material, which can effectively prevent warping and meet the printing requirements of various temperatures.

[0077] The upper printing board 200 includes a composite wood layer 210 and at least one printing layer 220 .

[0078] The composite wood layer 210 is disposed on the adjustment structure and serves as a carrier of the printing layer 220 .

[0079] The composite wood board layer 210 can be specifically formed by splicing a number of independent composite wood boards, which not only reduces the cost but also allows the corresponding number of composite wood boards to be selected for splicing according to the actual printing volume, so that this embodiment can meet the needs of various printing volumes.

[0080] The splicing method between the composite wood boards is the existing technology, such as gluing, screwing, plugging, etc.

[0081] The printing layer 220 is used to be directly integrated with the printing material fixing body and has very high firmness. The number of the printing layer 220 can be determined according to actual needs, such as the thickness of the printing material. If the thickness of the printing material increases, the number of the printing layer 220 must also increase accordingly, so as to improve the firmness between the printing material and the printing material.

[0082] The printing layer 220 may specifically consist of a glue layer 221 and a granular material layer 222 . The granular material layer 222 specifically consists of a plurality of granular materials of the same specification or type as the printing material. The glue layer 221 specifically is a resin instant glue layer.

[0083] In this way, each granular material of the granular layer 222 can be directly fixed on the upper surface of the composite wood board layer 210 through the glue layer 221. When the printing material flows into the printing layer 220, due to the high temperature of the printing material and the good heat insulation performance of the composite wood board layer 210, the temperature of the printing material will cause the glue layer 221 to melt. After the glue layer 221 melts, the printing material and the granular materials on the granular layer 222 will be bonded together, thereby making the printing material and the printing layer 220 directly bonded together. In addition, since the granular materials on the granular layer 222 are of the same specification or type as the printing material, the firmness is very high.

[0084] The adjustment structure is arranged below the lower bottom plate 100 , and is used to support the upper printing plate 200 , and can drive the upper printing plate 200 to move up and down and adjust the horizontal angle of the upper printing plate 200 .

[0085] A plurality of support columns 110 are provided at the bottom of the lower base plate 100, and the lower base plate 100 can be suspended by the support columns 110, so as to facilitate the installation of the adjustment structure. A plurality of groups of through holes are provided on the lower base plate 100, and each group of through holes consists of a first through hole and a second through hole located on the same horizontal line. The first through hole is located on the left side of the lower base plate 100, and the second through hole is located on the right side of the lower base plate 100.

[0086] The adjustment structure includes a plurality of first lifting cylinders 310 and a plurality of second lifting cylinders 320, each of which is respectively arranged below the lower bottom plate 100, and each telescopic end of each first lifting cylinder 310 passes through a first through hole, and each telescopic end of each second lifting cylinder 320 passes through a second through hole, and a rectangular connecting block 410 is respectively provided at the top of the telescopic end of each first lifting cylinder 310 and the top of the telescopic end of each second lifting cylinder 320, and a threaded connecting groove is provided on the upper surface of each rectangular connecting block 410.

[0087] A plurality of connection holes are respectively provided on both sides of the upper printing plate 200, and each connection hole is matched with a first through hole or a third through hole. Thus, the upper printing plate 200 and the adjustment structure can be detachably mounted by passing the screws 500 through the connection holes on the upper printing plate 200 and connecting with the threaded connection grooves on the rectangular connection block 410. Thus, the corresponding upper printing plate 200 can be replaced according to printing materials of different specifications or types in this embodiment, thereby improving the scope of use.

[0088] Since the upper printing plate 200 is supported by each first lifting cylinder 310 and each second lifting cylinder 320, the lifting and lowering of the upper printing plate 200 is achieved by simultaneously controlling the extension and retraction of each first lifting cylinder 310 and each second lifting cylinder 320, so that the height of the platform device can be adjusted in this embodiment to meet various printing height requirements.

[0089] In addition, the adjustment structure also includes a plurality of third lifting cylinders 330, and a plurality of third through holes are provided on the lower base plate 100, and each third through hole is located on the same horizontal line as a group of through holes, and the telescopic end of each third lifting cylinder 330 passes through a corresponding third through hole, and a hemispherical connecting block 420 is provided at the top of the telescopic end of each third lifting cylinder 330, and the arc surface of the hemispherical connecting block 420 contacts the lower surface of the upper printing plate 200.

[0090] When the height of the upper printing plate 200 needs to be adjusted, each of the first lifting cylinders 310 , each of the second lifting cylinders 320 , and each of the third lifting cylinders 330 can be controlled to work simultaneously.

[0091] When the horizontal angle of the upper printing plate 200 does not meet the printing requirements, the third lifting cylinder 330 may be stopped from working, and each of the first lifting cylinders 310 and each of the second lifting cylinders 320 may be controlled to work respectively, so that the upper printing plate 200 can be rotated on the hemispherical connecting block 420 to achieve angle fine-tuning, so that the horizontal angle of the upper printing plate 200 meets the printing requirements, thereby improving the printing accuracy.

[0092] See also Figure 4 In addition, the present embodiment may further include a controller 600, which is respectively connected to each first lifting cylinder 310, each second lifting cylinder 320 and each third lifting cylinder 330. In this way, the controller 600 can simultaneously control the operation of each first lifting cylinder 310, each second lifting cylinder 320 and each third lifting cylinder 330, and can also control the operation of the corresponding cylinders individually, thereby improving work efficiency.

[0093] Furthermore, since when there is an error in the horizontal angle of the upper printing plate 200, the error value is generally very small and therefore difficult to detect, the present embodiment further includes a plurality of infrared distance sensors 700, which can be respectively arranged on the four sides of the composite wood board layer 210 and connected to the controller 600.

[0094] Through these infrared distance sensors 700, the distance between each part of the upper printing plate 200 and the extruder can be measured in real time, and the sensed distance information can be sent to the controller 600. Before printing, the distance between each part of the upper printing plate 200 and the extruder can be understood in real time through the controller 600. When the distance information transmitted by the infrared distance sensor 700 is different, it proves that there is a problem with the horizontality of the upper printing plate 200. At this time, printing can be stopped first, and the corresponding cylinder can be controlled by the controller 600 to work until the distance information subsequently transmitted by each infrared distance sensor 700 is the same, which proves that the upper printing plate 200 is in a horizontal state. Only then can printing be performed.

[0095] The present embodiment further provides a manufacturing process of the upper printing plate 200, which includes:

[0096] S1, according to the printing volume requirement, select a corresponding number of composite wood boards and splice them to form a composite wood board layer 210, the thickness of the composite wood board layer is at least 30 cm;

[0097] S2, preparing granular materials of the same specification or type as the printing material, and then evenly spreading them on the composite wood board layer 210 using a sieve;

[0098] S3, using a leveling scraper and a vibrating air hammer to evenly knock and level the granular materials spread on the composite wood board layer 210, so that each granular material lies evenly on the composite wood board layer 210;

[0099] S4, select matching resin instant glue according to the paved granular materials and spray the resin instant glue evenly on the paved granular materials through the spraying head. When spraying, the spraying force and flow rate should be controlled to prevent excessive flow rate from destroying the previously evenly laid granular materials;

[0100] S5, waiting for 3-4 hours, the resin instant glue is completely dried to form the upper printing plate 200.

[0101] In addition, if the number of printed layers 220 is greater than one, each time a layer is added, the above S2-S4 can be repeated after S5, except that the object of scattering the granular material in S2 is changed to the previous printed layer 220 instead of the composite wood board layer 210.

[0102] Furthermore, when the printed layer 220 is damaged, the above-mentioned S2-S4 can be used to repair it, so that the printed layer 220 can be reused, reducing the cost.

[0103] The upper printing plate 200 manufactured by the above process has a very low cost and is easy to manufacture because the above printing layer 220 is only composed of common and low-cost granular materials and resin glue.

[0104] In addition, the above-mentioned printing layer 220 only needs to select the corresponding amount of particles and resin glue according to the printing volume requirements and lay it on the composite wood board layer 210, so that the upper printing board 200 can meet various printing volume requirements.

[0105] Furthermore, since the print layer 220 is formed by melting the glue layer 221 due to the temperature of the print material, thereby bonding the print material and the granular layer 222 together, this embodiment does not require a heating plate to be provided on the lower base plate 100 to heat the print layer 220, and can meet printing requirements of various temperatures.

[0106] The following is the specific application of this embodiment:

[0107] The ultra-large volume 3D printing used for the landscape bridge and the smaller volume 3D printing used for the 5-meter bridge respectively, in the actual printing process, the bonding effect between the printing material and the upper printing plate 200 is very ideal, and in the process of releasing the thermal stress when the temperature of the printing material drops from 230°C when it is extruded to 0°C, there is no obvious detachment from the bottom, so the firmness is very high.

[0108] The following is a table of mechanical properties test of the sample strip after printing by the 3D printer using this embodiment:

[0109]

[0110] In the above table, samples 1 and 2 are the bending strengths in the xy direction, and samples 3 and 4 are the bending strengths in the z direction. Both the bending strengths in the xy direction and the bending strengths in the z direction are higher than the strengths of the splines printed by the platform device in the prior art, so this embodiment also improves the strength of the printed product.

[0111] Compared with the above-mentioned embodiment 1, this embodiment has all the advantages of embodiment 1 and also has the advantages of meeting various printing heights and improving printing accuracy.

[0112] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A platform device suitable for 3D printing, the platform device comprising a lower base plate (100) and an upper printing plate (200), characterized in that: The upper printing plate (200) comprises a composite wood board layer (210), at least one printing layer (220) is provided on the upper surface of the composite wood board layer (210), and the printing material extruded by the extrusion device of the printer can be directly fixed to the printing layer (220) as a whole without the need for heating; The printing layer (220) comprises a glue layer (221) and a granular material layer (222); the granular material layer (222) is composed of a plurality of granular materials of the same specification or type as the printing material; the glue layer (221) is a resin instant glue layer (221); the composite wood board layer (210) is formed by splicing a plurality of independent composite wood boards; and the upper printing board (200) is detachably arranged on the lower base plate (100).

2. A platform device suitable for 3D printing according to claim 1, characterized in that: The lower bottom plate (100) is provided with an adjustment structure, and the upper printing plate (200) is detachably arranged on the adjustment structure, and the adjustment structure can drive the upper printing plate (200) to rise and fall.

3. A platform device suitable for 3D printing according to claim 2, characterized in that: The bottom of the lower bottom plate (100) is provided with a plurality of support columns, the lower bottom plate (100) is provided with a plurality of groups of through holes, each group of through holes is composed of a first through hole and a second through hole located on the same horizontal line, the first through hole is located on the left side of the lower bottom plate (100), and the second through hole is located on the right side of the lower bottom plate (100), the adjustment structure is located at the bottom of the lower bottom plate (100), and the adjustment structure comprises a plurality of first lifting cylinders (310) and a plurality of second lifting cylinders (320), each first lifting cylinder ( The telescopic end of each lifting cylinder (310) passes through a first through hole, and the telescopic end of each second lifting cylinder (320) passes through a second through hole. A rectangular connecting block (410) is provided at the top of each telescopic end of the first lifting cylinder (310) and the top of each telescopic end of the second lifting cylinder (320). A threaded connecting groove is provided on the upper surface of the rectangular connecting block (410). A plurality of connecting holes are provided on both sides of the upper printing plate (200), and each connecting hole is matched with a first through hole or a third through hole.

4. A platform device suitable for 3D printing according to claim 3, characterized in that: The adjustment structure further comprises a plurality of third lifting cylinders (330), the lower bottom plate (100) is further provided with a plurality of third through holes, and each third through hole is located on the same horizontal line as a group of through holes, the telescopic end of each third lifting cylinder (330) passes through a corresponding third through hole, and the top end of the telescopic end of each third lifting cylinder (330) is provided with a hemispherical connecting block (420), and the arc surface of the hemispherical connecting block (420) contacts the lower surface of the upper printing plate (200).

5. A platform device suitable for 3D printing according to claim 4, characterized in that: The platform device further comprises a controller (600), wherein the controller (600) is respectively connected to each first lifting cylinder (310), each second lifting cylinder (320) and each third lifting cylinder (330).

6. A platform device suitable for 3D printing according to claim 5, characterized in that: The platform device also includes a plurality of infrared distance sensors (700), which are respectively arranged on four sides of the composite wood board layer (210) and connected to the controller (600).

7. A manufacturing process of an upper printing plate (200) of a platform device suitable for 3D printing according to any one of claims 1 to 6, characterized in that: The manufacturing process comprises: S1, according to the printing volume requirement, selecting a corresponding number of composite wood boards and splicing them to form a composite wood board layer (210), wherein the thickness of the composite wood board layer (210) is at least 30 cm; S2, preparing granular materials of the same specification or type as the printing material, and then evenly spreading them on the composite wood board layer (210) using a sieve; S3, using a leveling scraper and a vibrating air hammer to evenly knock and level the granular materials spread on the composite wood board layer (210), so that each granular material lies evenly on the composite wood board layer (210); S4, select matching resin instant glue according to the paved granular materials and spray the resin instant glue evenly on the paved granular materials through the spraying head. When spraying, the spraying force and flow rate should be controlled to prevent excessive flow rate from destroying the previously evenly laid granular materials; S5, waiting for 3-4 hours, the resin instant glue is completely dried to form the upper printing plate (200).

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