Substrate, hot bed and 3D printer

Abstract

The utility model provides a base plate, a hot bed and a 3D printer, the base plate is provided with at least one first assembly part and a plurality of second assembly parts, the surface of a plate body of the base plate comprises a central area and an annular peripheral area surrounding the central area, and all the first assembly parts and all the second assembly parts are distributed in the annular peripheral area around the central area. The second fitting portion is configured to be configured as a linear structure along a linear trajectory. On the basis that the first assembly part provides fixed assembly, the second assembly part is configured to form a linear structure along a linear track, the linear structure of the second assembly part can allow the position (or area) of the hot bed where the second assembly part is located to move relative to the 3D printer along the linear track, and the movement amount of the hot bed in a thermal expansion state is provided; the activity amount can be used for releasing thermal strain along a linear track, so that the problem that the thermal bed is deformed due to the fact that the thermal strain cannot be released in a thermal expansion state of the thermal bed is solved.

Description

Technical Field

[0001] This application relates to the field of 3D printing technology, and in particular to substrates, heated beds and 3D printers. Background Technology

[0002] In FDM (Fused Deposition Modeling) 3D printers, a heated bed is located beneath the printing plate during the printing process to heat the plate. This heated bed setup ensures better adhesion of the printing plate, prevents warping, reduces distortion during printing, thus improving print quality and facilitating demolding. Currently, heated beds use an aluminum substrate as the heat source. The aluminum substrate expands when heated, and the existing four-corner fixing method prevents the thermal strain from dissipating, causing the heated bed itself to deform. This deformation, in turn, causes the printing plate to deform, resulting in warping and distortion of the printed model. Summary of the Invention

[0003] Therefore, it is necessary to provide a substrate, a heated bed, and a 3D printer to address the aforementioned technical problems.

[0004] This application provides a substrate for a heated bed, the substrate having a first assembly portion and a second assembly portion, the second assembly portion being configured to form a linear structure along a linear trajectory.

[0005] In one embodiment, the first mounting portion is configured as a mounting hole; and / or,

[0006] The second assembly part is configured as a linear assembly hole or linear slide rail formed along the linear trajectory.

[0007] In one embodiment, the substrate is configured as a square plate, the annular peripheral region of the substrate has four corners, the number of the first assembly part is configured to be one, the number of the second assembly part is configured to be three, and the one first assembly part and the three second assembly parts are distributed at the four corners of the substrate.

[0008] In one embodiment, the substrate is provided with a plurality of magnetic attraction components, and the distribution density of the plurality of magnetic attraction components in the central region of the substrate is greater than or equal to the distribution density in the annular peripheral region of the substrate.

[0009] This application provides a heated bed, the heated bed comprising:

[0010] Heating plate;

[0011] The substrate is disposed on the upper surface of the heating plate, and the heating plate and the substrate together provide the first assembly part and the second assembly part.

[0012] In one embodiment, the heated bed includes:

[0013] A fixing assembly includes a first connector and a second connector; wherein the first connector passes through the first assembly portion, the second connector passes through the second assembly portion, and the second connector includes a connected smooth rod segment and a threaded segment, the smooth rod segment being movable within the second assembly portion to release the thermal strain of the substrate;

[0014] The fixing assembly also includes a height-adjusting connector, through which at least one of the first connector and the second connector is connected to the 3D printer.

[0015] In one embodiment, the fixing component further includes:

[0016] The irregularly shaped gasket has at least one axially deformable portion, and the irregularly shaped gasket has axial elastic deformation capability based on the axially deformable portion. The smooth rod section of the second connector is elastically assembled to the second assembly portion through the irregularly shaped gasket.

[0017] In one embodiment, the irregularly shaped gasket is provided with a plurality of axially deformable portions that surround the circumference; the axially deformable portions are configured to be axially protruding or axially recessed.

[0018] In one embodiment, the heated bed further includes:

[0019] A leveling assembly, comprising a plurality of pressure sensors, wherein the plurality of pressure sensors are mounted at the bottom end of the leveling connector.

[0020] This application provides a 3D printer, the 3D printer comprising:

[0021] The heated bed;

[0022] A printing plate, which is disposed on the heated bed.

[0023] In the aforementioned substrate, heated bed, and 3D printer, the first assembly part is configured in a conventional fixing manner to ensure that the position (or area) of the first assembly part of the heated bed is fixed relative to the 3D printer, thus achieving the purpose of fixed assembly. Based on the fixed assembly provided by the first assembly part, the second assembly part is configured to form a linear structure along a linear trajectory. The linear structure of the second assembly part allows the position (or area) of the second assembly part of the heated bed to move relative to the 3D printer along the linear trajectory, providing the heated bed with a certain amount of movement under thermal expansion. This amount of movement can be used to release thermal strain along the linear trajectory, avoiding the problem that the heated bed itself cannot release thermal strain under thermal expansion, which would cause deformation. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of a 3D printer provided in one embodiment of this application.

[0025] Figure 2 This is a fully exploded schematic diagram of a heated bed provided in one embodiment of this application.

[0026] Figure 3 This is a partial exploded schematic diagram of a heated bed provided in one embodiment of this application.

[0027] Figure 4 This is a schematic diagram showing the distribution structure of the first assembly part and the second assembly part according to an embodiment of this application.

[0028] Figure 5 This is a schematic diagram of the mating structure of the second assembly and the second connector provided in one embodiment of this application.

[0029] Icon labels:

[0030] 10. 3D printer;

[0031] 100. Printing board; 200. Heated bed;

[0032] 1000, base plate; 2000, heating plate; 3000, fixing assembly; 4000, leveling assembly;

[0033] 1100, First assembly section; 1200, Second assembly section; 1201, Linear trajectory; 1300, Magnetic suction component;

[0034] 3100, First connecting piece; 3200, Second connecting piece; 3201, Polished rod section; 3202, Threaded section; 3300, Irregularly shaped gasket; 3301, Axial deformation part; 3400, Equal height connecting piece; 3500, Support piece. Detailed Implementation

[0035] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0036] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0037] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0038] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0039] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0040] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0041] See Figure 1 As shown, this application provides a 3D printer 10, which is an FDM (Fused Deposition Modeling) type 3D printer 10. The 3D printer 10 is used to perform various actions required for 3D printing. This type of 3D printer 10 includes a heated bed 200 and a printing plate 100. The printing plate 100 is disposed on the heated bed 200 and can be fixed to the bottom of the 3D printer 10 to support the printed model. The heated bed 200 can be used to heat the printing plate 100, thereby ensuring better adhesion of the printing plate 100, preventing abnormalities such as warping and bulging, reducing distortion during model printing, thus improving print quality and facilitating demolding. For example, it increases the adhesion when printing the first layer on the printing plate 100.

[0042] like Figure 2 and Figure 3 As shown, the heated bed 200 includes a heating plate 2000 and a substrate 1000, which can be made of aluminum or copper. The substrate 1000 is disposed on the upper surface of the heating plate 2000 and serves as the heat source for heating the printing plate 100. Since aluminum-based materials expand when heated, the thermal strain during the use of the heated bed 200 has nowhere to dissipate. To solve the problem of thermal strain release in the heated bed 200, this application improves the heated bed 200, with the main improvement located in the substrate 1000.

[0043] like Figure 4As shown, the substrate 1000 has at least one first mounting portion 1100 and a plurality of second mounting portions 1200. In another embodiment, the substrate 1000 and the heating plate 2000 can also be integrally formed, thereby allowing the heated bed 200 formed by the heating plate 200 and the substrate 1000 to be used together for setting the first mounting portion 1100 and the second mounting portion 1200. That is, the first mounting portion 1100 and the second mounting portion 1200 are not only constructed on the substrate 1000, but are jointly constructed on both the substrate 1000 and the heating plate 2000. For example, when the first mounting portion 1100 and the second mounting portion 1200 are hole structures, the hole structures are simultaneously formed on both the substrate 1000 and the heating plate 2000. Those skilled in the art can choose the arrangement of the first mounting portion 1100 and the second mounting portion 1200 according to actual needs, and no limitation is made here.

[0044] The first assembly portion 1100 and the second assembly portion 1200 are distributed at the edge of the substrate 1000. For example, the surface of the substrate 1000 can be divided into a central region and an annular peripheral region surrounding the central region. The central region and the annular peripheral region are areas roughly divided on the surface of the substrate 1000, mainly used to indicate the distribution of the first assembly portion 1100 and the second assembly portion 1200. Those skilled in the art can determine the proportion, size, shape, etc. of the central region and the annular peripheral region according to actual needs, which are not limited here.

[0045] Based on the division of the central region and the annular peripheral region on the substrate 1000, all first assembly parts 1100 and all second assembly parts 1200 are distributed around the central region in the annular peripheral region. As a major improvement of the heated bed 200, such as... Figure 4 As shown, the first assembly part 1100 is configured in a conventional fixing manner to ensure that the position (or area) of the first assembly part 1100 of the heated bed 200 is fixed relative to the 3D printer 10, thereby achieving the purpose of fixed assembly. Based on the fixed assembly provided by the first assembly part 1100, the second assembly part 1200 is configured to form a linear structure along the linear trajectory 1201. The linear structure of the second assembly part 1200 allows the position (or area) of the second assembly part 1200 of the heated bed 200 to move relative to the 3D printer 10 along the linear trajectory 1201, providing the heated bed 200 with a certain amount of movement in the thermal expansion state. This amount of movement can be used to release thermal strain along the linear trajectory 1201, avoiding the problem that the heated bed 200 itself cannot release thermal strain in the thermal expansion state, which would cause deformation.

[0046] The first assembly part 1100 or the second assembly part 1200 can adopt various fixed and non-fixed connection forms such as threaded connection, snap-fit ​​connection, and slide rail connection. Those skilled in the art can select the appropriate connection form according to actual needs. For example, in one embodiment, the first assembly part 1100 is configured as an assembly hole, such as a countersunk hole. The second assembly part 1200 is configured as a linear assembly hole or a linear slide rail formed along the linear trajectory 1201, such as a linear countersunk hole. Therefore, the assembly hole of the first assembly part 1100 can be used to fix the substrate 1000 and the 3D printer 10, while the assembly hole or slide rail constructed according to the linear trajectory 1201 can be used to achieve movable assembly relative to the 3D printer 10 in a movable or sliding manner, thereby providing the aforementioned amount of mobility to meet the release of thermal strain under thermal expansion conditions.

[0047] The substrate 1000 can be configured as a regular shape such as a square plate or a circular plate, or as another irregular shape. For example, when the substrate 1000 is configured as a square plate, such as... Figure 4 As shown, the annular peripheral region of the substrate 1000 has four corners. One first assembly part 1100 and three second assembly parts 1200 are configured, distributed at the four corners of the substrate 1000. In one embodiment, the substrate 1000 includes two parallel horizontal edges and two parallel vertical edges. The linear trajectories 1201 of the three second assembly parts 1200 are straight lines. The extension of the linear trajectory 1201 of one of the second assembly parts 1200 passes through the first assembly part 1100. One of the linear trajectories 1201 of the second assembly part 1200 is parallel to the horizontal edge of the substrate 1000, and the linear trajectory 1201 of the second assembly part 1200 is parallel to the vertical edge of the substrate 1000.

[0048] The above arrangement allows the substrate 1000 to be fixed relative to the 3D printer 10 based on a first assembly part 1100. The linear trajectories 1201 of the other three second assembly parts 1200 are arranged in the direction of thermal strain after thermal expansion. That is, after the substrate 1000 expands due to heat, it can move in a direction approximately away from the first assembly part 1100, thereby releasing thermal strain around the first assembly part 1100 in a direction approximately away from it. During this time, the flatness of the heated bed 200 itself does not change and will not affect the 3D printing process. After 3D printing ends, the heated bed 200 cools down. During the cooling process, the heated bed 200 deforms due to cold contraction and then contracts around the first assembly part 1100 in a direction approximately close to it. The flatness of the heated bed 200 itself remains unchanged.

[0049] In addition, those skilled in the art can set the arrangement direction of the linear trajectory 1201 of the second assembly parts 1200 and the number of the second assembly parts 1200 according to actual needs, thereby designing a thermal strain release scheme according to the actual structure of the substrate 1000 and the heating conditions, etc., without limitation.

[0050] The substrate 1000 is provided with a plurality of magnetic attraction components 1300. The magnetic attraction components 1300 can be permanent magnets such as magnetic beads. The plurality of magnetic attraction components 1300 can be used to magnetically attract the printing plate 100 from the substrate 1000, ensuring the flatness of the printing plate 100 during printing. The distribution density of the plurality of magnetic attraction components 1300 in the central region of the substrate 1000 is greater than or equal to the distribution density in the annular peripheral region of the substrate 1000, forming an arrangement with a denser inner area and a sparser outer area. This allows the magnetic attraction force on the central region of the printing plate 100 to be stronger and the magnetic attraction force on the annular peripheral region to be weaker, which is beneficial for the installation or removal of the printing plate 100 relative to the substrate 1000.

[0051] In one embodiment, the heated bed 200 includes a fixing assembly 3000 for assembling the heated bed 200 relative to the 3D printer 10, wherein, as... Figure 2 and Figure 3 As shown, the fixing assembly 3000 includes a first connector 3100 and a second connector 3200. When the first mounting portion 1100 is a mounting hole, the first connector 3100 can be inserted into the first mounting portion 1100, thereby achieving a fixed assembly of the heated bed 200 relative to the 3D printer 10 based on the first connector 3100 and the first mounting portion 1100. When the second mounting portion 1200 is a linear mounting hole, the second connector 3200 is inserted into the second mounting portion 1200. The screw of the second connector 3200 includes a connected smooth rod section 3201 and a threaded section 3202. The smooth rod section 3201 is movable within the second mounting portion 1200, thereby achieving a movable assembly of the heated bed 200 relative to the 3D printer 10 based on the second connector 3200 and the second mounting portion 1200. The movement of the smooth rod section 3201 within the second mounting portion 1200 provides the amount of movement of the heated bed 200 relative to the 3D printer 10, for releasing the thermal strain of the substrate 1000.

[0052] Continue reading Figure 5As shown, in one embodiment, the fixing assembly 3000 includes a shaped gasket 3300, which has at least one axially deformable portion 3301. The axially deformable portion 3301 has the ability to deform along the axial direction of the shaped gasket 3300, thereby also forming an elastic assembly force in the axial direction. Therefore, based on the axial elastic deformation capability of the axially deformable portion 3301, the smooth rod section 3201 of the second connector 3200 is elastically assembled to the second assembly portion 1200 through the shaped gasket 3300. The second connector 3200 exerts downward pressure on the heated bed 200, while allowing the heated bed 200 to expand and contract when heated, that is, allowing the second assembly portion 1200 to slide relative to the shaped gasket 3300 and the second connector 3200. Due to the design of its axial deformation part 3301, the irregularly shaped gasket 3300 does not have its entire surface area in contact with the heated bed 200. Therefore, the contact area is small, resulting in low lateral friction. When used with the second connector 3200, it can achieve the effect of vertical fastening and lateral freedom.

[0053] In one embodiment, the irregularly shaped gasket 3300 is provided with a plurality of axially deformable portions 3301 that circumferentially surround the circumference. The axially deformable portions 3301 can be configured as axially protruding or axially recessed. For example... Figure 5 As shown, the irregularly shaped gasket 3300 has several axially deformable portions 3301 that are axially protruding or axially recessed around its circumference, which allows the irregularly shaped gasket 3300 to appear as a wavy gasket that surrounds the circumference. In addition, those skilled in the art can also construct the actual shape of the irregularly shaped gasket 3300 according to actual needs, which is not limited here.

[0054] The fixing assembly 3000 includes a height-equalizing connector 3400. At least one of the first connector 3100 and the second connector 3200 is used to connect to the 3D printer 10 via the height-equalizing connector 3400. The height-equalizing connector 3400 can take various structures such as a column or a base. The height-equalizing connector 3400 can position the heated bed 200 in the height direction. For example, four height-equalizing connectors 3400 are set and distributed at the four corners of the heated bed 200. The four height-equalizing connectors 3400 are used to achieve the height-equal assembly of the heated bed 200 relative to the 3D printer 10, ensuring the levelness of the assembled heated bed 200.

[0055] Continue reading Figure 2 and Figure 3 As shown, the heated bed 200 includes a leveling assembly 4000 for calibrating the levelness of the substrate 1000. In one embodiment, the leveling assembly 4000 includes a plurality of pressure sensors distributed at the bottom end of the leveling connector 3400 for use during leveling of the heated bed 200.

[0056] The fixing assembly 3000 includes a support member 3500, which connects the leveling connector 3400 to the 3D printer 10. The leveling connector 3400 is fixed to the support member 3500 via a pressure sensor, thereby connecting the heated bed 200 to the main body of the 3D printer 10. For example, the support member 3500 can be a plate structure, with one outer end connected to the 3D printer 10 and the inner end connected to the pressure sensor 4000 and the leveling connector 3400. The leveling connector 3400, together with the first connector 3100 and the second connector 3200, fixes the heated bed 200. Here, fixing refers to vertical height fixation and horizontal sliding fixation.

[0057] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0058] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A substrate (1000), characterized in that, The substrate (1000) has a first assembly portion (1100) and a second assembly portion (1200), the second assembly portion (1200) being configured to form a linear structure along a linear trajectory (1201).

2. The substrate (1000) according to claim 1, characterized in that, The first assembly portion (1100) is configured as an assembly hole; and / or, The second assembly part (1200) is configured as a linear assembly hole or linear slide rail formed along the linear trajectory (1201).

3. The substrate (1000) according to claim 1, characterized in that, The substrate (1000) is configured as a square plate, and the annular peripheral region of the substrate (1000) has four corners. The number of the first assembly part (1100) is configured to be one, and the number of the second assembly part (1200) is configured to be three. One first assembly part (1100) and three second assembly parts (1200) are distributed at the four corners of the substrate (1000).

4. The substrate (1000) according to claim 1, characterized in that, The substrate (1000) is provided with a plurality of magnetic attraction components (1300), and the distribution density of the plurality of magnetic attraction components (1300) in the central region of the substrate (1000) is greater than or equal to the distribution density in the annular peripheral region of the substrate (1000).

5. A heated bed (200), characterized in that, The heated bed (200) includes: Heating plate (2000); The substrate (1000) as described in any one of claims 1-4 is disposed on the upper surface of the heating plate (2000), and the heating plate (2000) and the substrate (1000) are jointly provided with the first assembly part (1100) and the second assembly part (1200).

6. The heated bed (200) according to claim 5, characterized in that, The heated bed (200) includes: A fixing assembly (3000) includes a first connector (3100) and a second connector (3200); wherein the first connector (3100) passes through the first assembly portion (1100), and the second connector (3200) passes through the second assembly portion (1200). The second connector (3200) includes a connected smooth rod segment (3201) and a threaded segment (3202). The smooth rod segment (3201) is used to move within the second assembly portion (1200), thereby releasing the thermal strain of the substrate (1000). The fixing assembly (3000) also includes a level connector (3400), through which at least one of the first connector (3100) and the second connector (3200) is connected to the 3D printer (10).

7. The heated bed (200) according to claim 6, characterized in that, The fixing component (3000) also includes: A shaped gasket (3300) has at least one axially deformable portion (3301), and the shaped gasket (3300) has an axial elastic deformation capability based on the axially deformable portion (3301). The smooth rod section (3201) of the second connector (3200) is elastically assembled to the second assembly part (1200) through the shaped gasket (3300).

8. The heated bed (200) according to claim 7, characterized in that, The irregular gasket (3300) is provided with a plurality of axially deformable portions (3301) that surround the circumference; the axially deformable portions (3301) are configured to be axially protruding or axially recessed.

9. The heated bed (200) according to any one of claims 6-8, characterized in that, The heated bed (200) also includes: The leveling assembly (4000) includes a plurality of pressure sensors, which are mounted on the bottom end of the leveling connector (3400).

10. A 3D printer (10), characterized in that, The 3D printer (10) includes: The heated bed (200) as described in any one of claims 5-9; A printing plate (100) is disposed on the heated bed (200).

Images