Hot bed assembly and 3D printer

Abstract

The utility model relates to the technical field of 3D printing, aims to solve the technical problem that some existing hot bed assemblies are poor in forming quality, and provides a hot bed assembly and a 3D printer. The hot bed assembly comprises a hot bed plate, a platform plate and an adsorption part. The platform plate is arranged on the hot bed plate and provided with a first surface facing the hot bed plate and a construction surface deviating from the hot bed plate. The adsorption part is located between the hot bed plate and the platform plate, the adsorption part is provided with a first side face, the adsorption part is configured to be connected with the hot bed plate, and the edge of the first surface is attached to the first side face so that the construction surface can be kept flat. The method has the beneficial effect that the forming quality is improved.

Description

Technical Field

[0001] The present application relates to the field of 3D printing technology, and in particular to a hot bed assembly and a 3D printer. Background Art

[0002] The build platforms of some known 3D printers are prone to edge warping during the printing process, resulting in poor print quality. Utility Model Content

[0003] This application provides a hot bed assembly and a 3D printer to solve the technical problem of poor molding quality of some known molding platforms.

[0004] The present application provides a heated bed assembly, comprising a heated bed plate, a platform plate, and an adsorption portion. The platform plate is disposed on the heated bed plate, and has a first surface facing the heated bed plate and a build surface facing away from the heated bed plate. The adsorption portion is located between the heated bed plate and the platform plate, and has a first side surface. The adsorption portion is configured to connect to the heated bed plate and maintain contact between the edge of the first surface and the first side surface.

[0005] When the hot bed assembly of the present application is working, the hot bed plate heats the platform plate, causing the temperature of the platform plate to increase, thereby ensuring a firm bond between the consumables and the platform plate. At the same time, the adsorption portion is connected to the hot bed plate, and the edges of the first side and the first surface are aligned. In this way, the platform plate maintains a stable connection with the hot bed plate through the adsorption portion, and the edge of the first surface is kept in contact with the first side through the adsorption portion, so that the build surface can be kept flat during the printing process, providing an accurate and reliable reference surface for the consumables to be formed into printed parts. There is no need to frequently adjust the horizontality of the hot bed assembly during printing, and the possibility of the edge of the platform plate warping during printing is greatly reduced, thereby improving the print quality of the workpiece. In addition, due to the reliable adsorption effect of the adsorption portion, the build surface can be kept flat during the printing of large-size prints and long-term printing, thereby improving the scope of printing application.

[0006] In one possible implementation:

[0007] The hot bed plate has a second surface, which is concave inward along a direction away from the platform plate to form a mounting groove. The adsorption portion is arranged in the mounting groove. The adsorption portion also has a second side surface opposite to the first side surface. The first side surface is attached to the first surface, and the second side surface is attached to the bottom surface of the mounting groove.

[0008] In one possible implementation:

[0009] The mounting groove passes through the side surface of the hot bed plate and forms an opening on the side surface of the hot bed plate. The adsorption portion is located inside the opening.

[0010] In one possible implementation:

[0011] The heated bed assembly further includes an adsorption plate, which is disposed between the heated bed plate and the platform plate. The adsorption plate has a third surface and a fourth surface opposite to each other. The third surface is attached to the heated bed plate. The adsorption plate is configured to attach the first surface to the fourth surface.

[0012] In one possible implementation:

[0013] The adsorption plate is provided with a first avoidance hole, which penetrates the adsorption plate along the thickness direction of the adsorption plate, and the adsorption part is provided in the first avoidance hole.

[0014] In one possible implementation:

[0015] There are multiple adsorption parts, and the multiple adsorption parts are distributed along the circumference of the platform plate.

[0016] In one possible implementation:

[0017] The platform plate has a first edge and a second edge arranged opposite to each other; the first edge is provided with two adsorption parts, and the two adsorption parts are respectively located at the two ends of the length direction of the first edge; the second edge is provided with another two adsorption parts, and the other two adsorption parts are respectively located at the two ends of the length direction of the second edge.

[0018] In one possible implementation:

[0019] The adsorption portion includes a magnetic structure, the platform plate includes a magnetic plate, the magnetic structure is detachably connected to a side of the hot bed plate facing the platform plate, and the magnetic plate is magnetically adsorbed to the magnetic structure.

[0020] The present application also provides a 3D printer, comprising the aforementioned hot bed assembly.

[0021] In one possible implementation:

[0022] The 3D printer also includes a support bracket, one side of which extends outwardly to form a connecting portion. A first avoidance groove is provided on an edge of the heated bed plate of the heated bed assembly. The orthographic projection of the first avoidance groove on the support bracket is located inward of the connecting portion. The first avoidance groove is configured to accommodate a fastening structure that secures the heated bed plate and the connecting portion. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 This is a schematic structural diagram of a 3D printer according to one or more embodiments of the present application.

[0025] Figure 2 This is a schematic structural diagram of a heated bed assembly according to one or more embodiments of the present application.

[0026] Figure 3 This is a schematic diagram of the exploded structure of the hot bed assembly according to one or more embodiments of the present application.

[0027] Figure 4 for Figure 2 A local enlarged schematic diagram of the V in the middle.

[0028] Figure 5 This is a schematic structural diagram of the heated bed assembly and support bracket according to one or more embodiments of the present application.

[0029] Figure 6 for Figure 2 A partial enlarged schematic diagram of point VI in the middle.

[0030] Description of main component symbols:

[0031]

[0032] DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0034] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may also be an element centered therein. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may also be an element centered therein. When an element is considered to be "set on" another element, it may be directly set on the other element or there may also be an element centered therein. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "or / and" as used herein includes any and all combinations of one or more of the relevant listed items.

[0036] Some embodiments of the present application are described in detail. In the absence of conflict, the following embodiments and features of the embodiments can be combined with each other.

[0037] See also Figure 1 , this embodiment provides a 3D printer 200, for example, a 3D printer 200 based on FDM technology.

[0038] The 3D printer 200 includes a base 201 , a heated bed assembly 100 , a frame 202 , a print head 208 , an X-axis displacement drive assembly 203 , a Y-axis displacement drive assembly 204 , a Z-axis displacement drive assembly 205 and a support bracket 206 .

[0039] The frame 202 is fixedly connected to the base 201. The Z-axis displacement drive assembly 205 is connected to the frame 202, the X-axis displacement drive assembly 203 is connected to the Z-axis drive assembly, the print head 208 is connected to the X-axis displacement drive assembly 203, and the Y-axis displacement drive assembly 204 is connected to the base 201 and connected to the heated bed assembly 100 via the support bracket 206.

[0040] In this way, relative displacement can occur between the print head 208 and the heated bed assembly 100 in the first direction X, the second direction Y, and the third direction Z, so that the print head 208 can extrude the consumable material on the heated bed assembly 100 and print a three-dimensional printed part.

[0041] In other embodiments, the heated bed assembly 100 and the print head 208 can be moved in other directions, which are not limited herein. For example, the Z-axis displacement drive assembly 205 can be disposed on the base 201 and connected to the heated bed assembly 100. The print head 208 is connected to the frame 202 via a bidirectional drive structure that is driven in both the first direction (X) and the second direction (Y) by the X-axis displacement drive assembly 203 and the Y-axis displacement drive assembly 204.

[0042] In some embodiments, see Figure 2 and Figure 3 The heated bed assembly 100 includes a heated bed plate 10, a platform plate 20 and an adsorption portion 30. The heated bed plate 10 is used to connect to the Y-axis displacement drive assembly 204 (see Figure 1). The platform plate 20 is arranged on the hot bed plate 10, and the platform plate 20 has a first surface P1 facing the hot bed plate 10 and a building surface P7 away from the hot bed plate 10. The building surface P7 is used to form a three-dimensional printed part. The adsorption portion 30 is located between the hot bed plate 10 and the platform plate 20, and the adsorption portion 30 has a first side surface P5. The adsorption portion 30 is configured to be connected to the hot bed plate 10 and keep the edge of the first surface P1 in contact with the first side surface P5 to keep the building surface P7 flat. Herein, keeping the building surface P7 flat means that the building surface P7 is roughly planar, and the hot bed assembly 100 can be leveled by some known leveling devices, so that the building surface P7 is formed into a plane perpendicular to the third direction Z.

[0043] When the heated bed assembly 100 of this embodiment is in operation, the heated bed plate 10 heats the platform plate 20, raising the temperature of the platform plate 20 and thereby ensuring a secure bond between the consumables and the platform plate 20. Simultaneously, the adsorption portion 30 is connected to the heated bed plate 10, aligning the edges of the first side surface P5 and the first surface P1. In this way, the platform plate 20 maintains a stable connection to the heated bed plate 10 via the adsorption portion 30, and the edge of the first surface P1 remains in contact with the first side surface P5 via the adsorption portion 30. This allows the build surface P7 to remain flat during the printing process, providing an accurate and reliable reference surface for the consumables to be formed into printed parts. Frequent adjustment of the level of the heated bed assembly 100 is unnecessary during printing, significantly reducing the possibility of the edge of the platform plate 20 warping during printing, thereby improving the print quality of the workpiece. Furthermore, due to the reliable adsorption of the adsorption portion 30, the build surface P7 remains flat even during the printing of large-scale prints and long printing times, thus expanding the printing application range.

[0044] In some embodiments, first side surface P5, first surface P1, and building surface P7 are all parallel to each other.

[0045] In some embodiments, the adsorption portion 30 includes a magnetic structure 30a, and the platform 20 includes a magnetic plate 20a. The magnetic structure 30a is detachably connected to the side of the hot bed 10 facing the platform 20, and the magnetic plate 20a is magnetically attached to the magnetic structure 30a. The magnetic attraction between the magnetic structure 30a and the magnetic plate 20a ensures that the edge of the first surface P1 is aligned with the first side surface P5 during printing. It also facilitates the removal of the platform 20 after printing, allowing for easy separation of the printed workpiece from the platform 20. This balances print quality and reliable separation of the printed workpiece. Furthermore, the magnetic structure 30a is directly located on the side of the hot bed 10 near the magnetic plate 20a, eliminating the need for additional components between the adsorption portion 30 and the platform 20. This ensures the reliability of the magnetic force between the adsorption portion 30 and the platform 20, improves the reliability of the alignment between the edge of the first surface P1 and the first side surface P5, further reduces the possibility of warping at the edge of the platform 20, and improves print quality.

[0046] In some embodiments, the magnetic plate 20a is a plate that has a magnetic field or can be attracted by a magnet. The magnetic structure 30a is a structure that has a magnetic field or can be attracted by a magnet. For example, the material of the magnetic plate 20a and the magnetic structure 30a can include a permanent magnet, an electromagnet, or a metal material that can be attracted by magnetism. For example, the magnetic plate 20a can be made of spring steel. The magnetic structure 30a is a permanent magnet or an electromagnet.

[0047] In some embodiments, the magnetic structure 30a and the heated bed plate 10 can be detachably connected by magnetic attraction, or by other connection methods such as threaded connection, pin connection, and snap connection.

[0048] In other embodiments, the adsorption portion 30 may be configured as an adsorption structure that generates adsorption force through vacuum adsorption. Therefore, in this embodiment, there are many structures of the adsorption portion 30 that achieve the adsorption effect, and this embodiment does not specifically limit them.

[0049] In some embodiments, see Figure 3 The heated bed assembly 100 further includes an adsorption plate 40, which is disposed between the heated bed plate 10 and the platform plate 20. The adsorption plate 40 has a third surface P3 and a fourth surface P4 opposite to each other. The third surface P3 is attached to the heated bed plate 10, and the adsorption plate 40 is configured to attach the first surface P1 to the fourth surface P4.

[0050] In this way, the center area of ​​the platform plate 20 can also be stabilized relative to the heated bed plate 10 via the suction plate 40, further improving printing quality. The third surface P3 can be bonded to the surface of the heated bed plate 10 using adhesive. Alternatively, the suction plate 40 can be connected to the heated bed plate 10 using screws, pins, or snaps, thereby ensuring that the third surface P3 adheres to the heated bed plate 10.

[0051] In some embodiments, the adsorption plate 40 may be configured as a soft magnetic sticker, which can be stably attached to the spring steel plate, thereby ensuring that most areas of the first surface P1 are stably attached to the fourth surface P4.

[0052] In some embodiments, see Figure 3 and Figure 4The hot bed plate 10 has a second surface P2, and the first surface P1 is attached to the second surface P2. The second surface P2 is concave inward in a direction away from the platform plate 20 to form a mounting groove C1. The adsorption portion 30 is arranged in the mounting groove C1. The adsorption portion 30 has a first side surface P5 and a second side surface P6 arranged opposite to each other. The first side surface P5 is attached to the first surface P1, and the second side surface P6 is attached to the bottom surface of the mounting groove C1. The mounting groove C1 can provide an installation space for the adsorption portion 30, so as to provide an adsorption portion 30 with a larger size in the third direction Z. When the adsorption portion 30 is a magnetic structure 30a, the magnetic force of the adsorption portion 30 can be increased. In addition, the mounting groove C1 can also provide a positioning and installation function for the adsorption portion 30, ensuring the installation reliability of the adsorption portion 30.

[0053] In some embodiments, see Figure 4 The mounting groove C1 extends through the side of the heated bed 10 and forms an opening K1 on the side of the heated bed 10. The suction unit 30 is located inside the opening K1. This simplifies the machining of the mounting groove C1 and provides a larger installation space for easily installing suction units 30 of different specifications.

[0054] In some embodiments, see Figure 3 The adsorption plate 40 is provided with a first avoidance hole K4, which extends through the adsorption plate 40 along its thickness. The adsorption unit 30 is located within the first avoidance hole K4. This prevents the adsorption plate 40 from interfering with the direct contact between the adsorption unit 30 and the platform plate 20, ensuring reliable adhesion between the adsorption unit 30 and the platform plate 20. Furthermore, the adsorption plate 40 does not interfere with the surface adsorption function between the platform plate 20 and the heated bed plate 10.

[0055] In some embodiments, see Figure 5 The number of adsorption parts 30 is multiple, and the number of adsorption parts 30 is multiple, and the multiple adsorption parts 30 are distributed along the circumference of the platform plate 20. The circumference of the platform plate 20 refers to the extending direction of the edge of the platform plate 20. In this way, the adsorption effect of the edge of the platform plate 20 can be further improved, thereby ensuring the flatness of the build surface P7 of the platform plate 20.

[0056] In some embodiments, the platform plate 20 is rectangular, and each of the four corners of the platform plate 20 is provided with at least one adsorption portion 30. In other embodiments, the platform plate 20 may also be elliptical, circular, or other shapes.

[0057] In some embodiments, see Figure 5The platform plate 20 has a first edge L1 and a second edge L2 disposed opposite to each other. Two adsorption portions 30 are provided on the first edge L1, one at each end of the lengthwise direction of the first edge L1. Another two adsorption portions 30 are provided on the second edge L2, one at each end of the lengthwise direction of the second edge L2.

[0058] In other embodiments, the adsorption portion 30 may be constructed as an annular structure, and the mounting groove C1 may be constructed as an annular groove. The annular structure refers to a closed belt-like structure with a hollow center. The annular structure is similar to the shape of the edge of the platform plate 20. For example, when the shape of the platform plate 20 is rectangular, the adsorption portion 30 is constructed as a rectangular annular structure. When the shape of the platform plate 20 is circular or elliptical, the adsorption portion 30 is constructed as a circular ring structure or an elliptical ring structure. In this way, the adsorption portion 30 can adsorb any position of the edge of the first surface P1 of the platform plate 20 on the first side surface P5.

[0059] In some embodiments, see Figure 5 The platform plate 20 also includes a third edge L3 and a fourth edge L4 disposed opposite to each other. The first edge L1, the third edge L3, the second edge L2, and the fourth edge L4 are sequentially connected along the circumference of the platform plate 20. The platform plate 20 also includes two protrusions 23. The two protrusions 23 are spaced apart from the third edge L3 and are formed to protrude outward in a direction away from the fourth edge L4. The two protrusions 23 facilitate the user's handheld removal of the platform plate 20 from the suction plate 40, thereby facilitating the removal of the platform plate 20 and the workpiece after printing is completed.

[0060] In some embodiments, see Figure 5 and Figure 6 A connecting portion 207 is formed on one side of the support bracket 206. A first clearance groove C2 is defined on the edge of the heated bed plate 10 of the heated bed assembly 100. The orthographic projection of the connecting portion 207 on the heated bed plate 10 is located inside the edge of the heated bed plate 10. The first clearance groove C2 is configured to accommodate a fastening structure (not shown) that secures the heated bed plate 10 to the connecting portion 207. The fastening structure passes through the first clearance groove C2 and connects to the connecting portion 207. The fastening structure can be configured as a screw, pin, or the like.

[0061] The edge of the adsorption plate 40 is provided with a second avoidance groove C3, and the fourth edge L4 is provided with a third avoidance groove C4. The second avoidance groove C3 and the third avoidance groove C4 correspond to the first avoidance groove C2. Thus, during the assembly of the heated bed assembly 100, the heated bed plate 10, the adsorption plate 40, and the platform plate 20 can be assembled first, and then the support bracket 206 can be connected to the heated bed plate 10 via the connecting portion 207 and fasteners. This serves both as a connection and a positioning function, facilitating the subsequent fastening of the support bracket 206 to the heated bed plate 10.

[0062] In this way, the first edge L1 , the second edge L2 , the third edge L3 and the fourth edge L4 all have related functional elements, and the functional elements do not interfere with each other, thereby ensuring the reliability of the heated bed assembly 100 .

[0063] In some embodiments, see Figure 3 The support bracket 206 defines a first fixing hole K2, and the heated bed 10 defines a second fixing hole K3. The 3D printer 200 further includes a fixing member (not shown) that passes through the second fixing hole K3 and the first fixing hole K2 to secure the heated bed 10 to the support bracket 206. The fixing member can be a fastening structure such as a pin or a screw.

[0064] In some embodiments, the adsorption plate 40 further defines a second avoidance hole K5. The second avoidance hole K5 corresponds to the second fixing hole K3. The second avoidance hole K5 is configured to accommodate a fixing member. This prevents the fixing member from interfering with the platform plate 20, ensuring the flatness of the build surface P7 of the platform plate 20 and improving printing quality.

[0065] The number and arrangement of the first fixing holes K2 , the second fixing holes K3 , and the second avoidance holes K5 can be set according to actual fixing requirements, and are not specifically limited in this embodiment.

[0066] In some embodiments, see Figure 3 The support bracket 206 includes an outer frame 2062, an inner frame 2061, and multiple connecting structures 2063. The inner frame 2061 is located inside the outer frame 2062 and is connected to the outer frame 2062 via multiple connecting structures 2063. The multiple connecting structures 2063 are distributed along the circumference of the inner frame 2061. The heated bed 10 is mounted on the outer frame 2062, the inner frame 2061, and the multiple connecting structures 2063. In this way, the support bracket 206 can provide uniform and stable support for the heated bed 10.

[0067] In some embodiments, the inner frame 2061 and the outer frame 2062 are both provided with first fixing holes K2 , so that the connection between the heated bed plate 10 and the supporting bracket 206 is more reliable.

[0068] The above embodiments are only used to illustrate the technical solutions of the present application and are not intended to limit the present application. Although the present application has been described in detail with reference to the above preferred embodiments, those skilled in the art should understand that modifications or equivalent replacements of the technical solutions of the present application should not depart from the spirit and scope of the technical solutions of the present application.

Claims

1. A hot bed assembly, characterized in that: include: Heated bed plate; a platform plate, the platform plate being disposed on the heated bed plate, the platform plate having a first surface facing the heated bed plate and a building surface facing away from the heated bed plate; The adsorption portion is located between the heated bed plate and the platform plate, and has a first side surface. The adsorption portion is configured to be connected to the heated bed plate and to keep the edge of the first surface in contact with the first side surface.

2. The hot bed assembly according to claim 1, characterized in that: The hot bed plate has a second surface, which is concave inward along a direction away from the platform plate to form a mounting groove. The adsorption portion is arranged in the mounting groove. The adsorption portion also has a second side surface opposite to the first side surface. The first side surface is attached to the first surface, and the second side surface is attached to the bottom surface of the mounting groove.

3. The hot bed assembly according to claim 2, characterized in that: The mounting groove passes through the side surface of the hot bed plate and forms an opening on the side surface of the hot bed plate. The adsorption portion is located inside the opening.

4. The heated bed assembly according to claim 1, wherein: The heated bed assembly further includes an adsorption plate, which is disposed between the heated bed plate and the platform plate. The adsorption plate has a third surface and a fourth surface opposite to each other. The third surface is attached to the heated bed plate. The adsorption plate is configured to attach the first surface to the fourth surface.

5. The heated bed assembly according to claim 4, characterized in that: The adsorption plate is provided with a first avoidance hole, which penetrates the adsorption plate along the thickness direction of the adsorption plate, and the adsorption part is provided in the first avoidance hole.

6. The hot bed assembly according to any one of claims 1 to 5, characterized in that: There are multiple adsorption parts, and the multiple adsorption parts are distributed along the circumference of the platform plate.

7. The heated bed assembly according to claim 6, characterized in that: The platform plate has a first edge and a second edge disposed opposite to each other; The first edge is provided with two adsorption portions, and the two adsorption portions are respectively located at two ends of the length direction of the first edge; The second edge is provided with another two adsorption portions, and the another two adsorption portions are respectively located at two ends of the length direction of the second edge.

8. The hot bed assembly according to any one of claims 1 to 5, characterized in that: The adsorption portion includes a magnetic structure, the platform plate includes a magnetic plate, the magnetic structure is detachably connected to a side of the hot bed plate facing the platform plate, and the magnetic plate is magnetically adsorbed to the magnetic structure.

9. A 3D printer, characterized in that: The method comprises the heated bed assembly according to any one of claims 1 to 8.

10. The 3D printer according to claim 9, wherein: The 3D printer further includes a support bracket, wherein one side of the support bracket extends outward to form a connecting portion; A first avoidance groove is provided on the edge of the heated bed plate of the heated bed assembly, the orthographic projection of the first avoidance groove on the supporting bracket is located inside the connecting portion, and the first avoidance groove is configured to accommodate a fastening structure for fixing the heated bed plate and the connecting portion.

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