A structure for heating a hot bed

Abstract

This invention relates to the field of printers and discloses a heated bed structure, including a heated bed mounting frame and a heated bed body. The heated bed mounting frame is used for fixing the heated bed body on the 3D printer and enabling bidirectional movement of the heated bed body. Several tension adjustment components are provided on both sides of the bottom of the heated bed mounting frame, which are used to adjust the clamping force of the heated bed body. Several leveling mechanisms are provided on both sides of the top of the heated bed mounting frame, which are used to adjust the flatness of the heated bed body. A heating module is provided at the bottom of the heated bed body, which is used to uniformly heat the heated bed body and maintain it at a constant temperature. An insulation component is provided at the bottom of the heated bed body, covering the heating module. The tension adjustment components and leveling mechanisms used in this invention can level the heated bed, ensuring better flatness and improving the quality of 3D printing.

Description

Technical Field

[0001] This invention relates to the field of printer technology, and more specifically to a heated bed structure. Background Technology

[0002] An FDM 3D printer is a machine that uses digital model files as a basis and employs special adhesive materials such as wax, powdered metal, or plastic to create FDM 3D models by printing layers of adhesive material.

[0003] During FDM 3D printing, when the molten, bindable material extruded from the print head comes into contact with the printing platform, the low temperature of the platform, combined with thermal expansion and contraction, can easily cause warping in the printed FDM 3D model, thus affecting print quality. To address this issue, most FDM 3D printers now incorporate a heated bed into the printing platform to maintain a constant temperature.

[0004] The currently used heated beds still have problems with flatness, heating, and part removal. There is currently no good solution for the three factors that affect printing quality caused by the heated bed: flatness, heating, and part removal. Therefore, it is urgent to design a heated bed structure to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a heated bed structure to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A heated bed structure includes a heated bed mounting frame and a heated bed body. The heated bed mounting frame is used for at least the fixed installation of the heated bed body on a 3D printer and enables bidirectional movement of the heated bed body.

[0008] Several tension adjustment components are provided on both sides of the bottom of the heated bed mounting frame. The tension adjustment components are used to adjust the clamping force of the heated bed body.

[0009] Several leveling mechanisms are provided on both sides of the top of the heated bed mounting frame. The leveling mechanisms are used at least to adjust the flatness of the heated bed body.

[0010] A heating module is provided at the bottom of the heated bed body. The heating module is used to uniformly heat the heated bed body and keep the heated bed body at a constant temperature.

[0011] The bottom of the heated bed body is provided with an insulation component that covers the outside of the heating module. The insulation component is used at least to maintain the heating temperature of the heating module and reduce the heat loss of the heated bed body.

[0012] Furthermore, the heated bed mounting frame includes a base plate, with integrally formed rolled edges on the outer walls of both sides of the base plate, and a connecting bushing fixedly installed on the outer wall of the bottom of the base plate.

[0013] Furthermore, the cross-sectional shape of the rolled edge is C-shaped, and the cavity height inside the rolled edge is 1-2 cm.

[0014] Furthermore, the outer walls on both sides of the heated bed mounting frame are provided with slots, and the slots are slidably connected to limiters, which are composed of a flat plate and a handle.

[0015] Furthermore, the heated bed body includes an aluminum substrate, a spring steel plate is provided on the front side of the aluminum substrate, and masking tape can be pasted on the front side of the spring steel plate, and a magnetic suction plate can also be adsorbed on the front side of the spring steel plate.

[0016] Furthermore, the heating module is fixedly disposed on the back side of the aluminum substrate, and the heating module is composed of several unit modules distributed at equal distances, and each unit module is in series.

[0017] Furthermore, the tension adjustment assembly includes a mounting hole provided on the heated bed mounting bracket, a bushing is threaded into the inside of the mounting hole, a turntable is fixedly provided on the outer wall of the bottom of the bushing, and a compression spring is fixedly inserted into the inside of the bushing.

[0018] Furthermore, the leveling mechanism includes a through hole on the heated bed mounting bracket, and a threaded sleeve located above the through hole is provided on the top of the heated bed mounting bracket. An adjusting screw is inserted into the internal thread of the threaded sleeve, and an operating head is fixedly provided at the top of the adjusting screw.

[0019] Furthermore, the bottom end of the adjusting screw is provided with a spherical groove, and a positioning ball is provided inside the spherical groove. The top of the heated bed body is provided with a recessed groove that cooperates with the positioning ball.

[0020] Furthermore, the heated bed body also includes a temperature monitoring module and a temperature display and alarm module.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] This invention provides a heated bed structure that employs a tension adjustment component and a leveling mechanism to achieve bed leveling, ensuring better flatness and improving the quality of 3D printing. The heating module and insulation components enhance the heating effect and uniformity of the heated bed while improving insulation and reducing heat loss. The heated bed utilizes various structures such as an aluminum substrate, spring steel plate, masking tape, and magnetic plates, allowing for multiple usage options to prevent the product from sticking to the heated bed and facilitating part removal. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0024] Figure 1 This is a schematic diagram of a heated bed mounting frame structure provided for a structural embodiment of heated bed heating according to the present invention.

[0025] Figure 2 A schematic diagram of a heated bed structure provided for an embodiment of the present invention. Figure 1 .

[0026] Figure 3 A schematic diagram of a heated bed structure provided for an embodiment of the present invention. Figure 2 .

[0027] Figure 4 This is a front view of the heated bed structure without the heated bed provided for a structural embodiment of the heated bed of the present invention.

[0028] Figure 5 This is a partially enlarged structural schematic diagram of a heated bed heating structure embodiment of the present invention.

[0029] Figure 6 This is a schematic diagram of the heating module and insulation component provided for a structural embodiment of heated bed heating according to the present invention.

[0030] Figure 7 This is a schematic diagram of the heated bed body structure provided for a structural embodiment of heated bed heating according to the present invention.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1. Heated bed mounting bracket; 11. Base plate; 12. Connecting bushing; 13. Rolled edge; 2. Heated bed body; 21. Aluminum base plate; 22. Spring steel plate; 23. Masking tape; 24. Magnetic suction plate; 25. Line connector; 3. Tightness adjustment assembly; 31. Mounting hole; 32. Liner ring; 33. Turntable; 34. Compression spring; 4. Leveling mechanism; 41. Through hole; 42. Threaded sleeve; 43. Adjusting screw; 44. Operating head; 45. Spherical groove; 46. Positioning ball; 5. Heating module; 6. Insulation component; 7. Limiting component. Detailed Implementation

[0033] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0034] like Figure 1-7 As shown in the figure, an embodiment of the present invention provides a heated bed structure, including a heated bed mounting frame 1 and a heated bed body 2. The heated bed mounting frame 1 is used at least for fixing the heated bed body 2 on a 3D printer and realizing bidirectional movement of the heated bed body 2. Several tension adjustment components 3 are provided on both sides of the bottom of the heated bed mounting frame 1, which are used at least for adjusting the clamping force of the heated bed body 2. Several leveling mechanisms 4 are provided on both sides of the top of the heated bed mounting frame 1, which are used at least for adjusting the flatness of the heated bed body 2. A heating module 5 is provided at the bottom of the heated bed body 2, which is used at least for uniformly heating the heated bed body 2 and keeping the heated bed body 2 at a constant temperature. A heat insulation component 6 is provided at the bottom of the heated bed body 2, which covers the heating module 5 and is used at least for maintaining the heating temperature of the heating module 5 and reducing the heat loss of the heated bed body 2.

[0035] This invention provides a heated bed structure that employs a tension adjustment component 3 and a leveling mechanism 4 to level the heated bed, ensuring better flatness and improving the quality of 3D printing. The heating module 5 and insulation component 6 enhance the heating effect and uniformity of the heated bed, while also improving insulation and reducing heat loss. The heated bed utilizes a structure with an aluminum substrate 21, spring steel plate 22, masking tape 23, and magnetic suction plate 24, allowing for multiple usage options to prevent the product from sticking to the heated bed and facilitating part removal.

[0036] Flatness Issues: 3D printing requires that the gap between the heated bed and the print head at any position does not exceed 0.1-0.2mm; otherwise, printing cannot proceed normally (if the gap is too large, the material cannot adhere to the substrate; if the gap is too small or negative, it will cause scratch damage to the print head). Maintaining the required gap between the entire table surface and the print head is extremely difficult for medium to large sizes (1 square meter to 3 square meters). Even if the substrate has sufficient strength and does not deform after heating, precision casting milling is still required, which is very costly. In practice, large cast plates need a thickness of 30-50mm to control thermal deformation. The internal structure design of the heated bed body 2 in this invention avoids the above problems, ensuring the rigidity and flatness of the heated bed body 2 as much as possible, thus improving the quality of the printed product.

[0037] Heating Issues: 3D printing operations require a working heated bed that can maintain a constant temperature of 40-50 degrees Celsius with rapid temperature rise and fall for precise temperature control. Increasing the heated bed area while maintaining flatness increases heating power, leads to faster temperature rise and fall, and increases usage and maintenance costs. The heating module 5 of this invention, composed of several equally spaced unit modules connected in series, along with insulation on the back of the heating module 5, ensures the heating efficiency and effect of the heated bed body 2.

[0038] Retrieval Issues: In existing 3D printers, the printed parts are picked up from the machine after printing. However, picking up large printed parts is inconvenient due to the interference of the machine frame space. The heated bed body 2 of this invention can be quickly disassembled from the heated bed mounting frame 1. At the same time, the masking tape set on the heated bed body 2 makes it easier for the operator to pick up the parts.

[0039] In this embodiment, a heated bed mounting frame 1 is included. The heated bed mounting frame 1 is used at least for the fixed installation of the heated bed body 2 on the 3D printer and to realize bidirectional movement of the heated bed body 2.

[0040] Specifically, the heated bed mounting frame 1 includes a base plate 11, with integrally formed rolled edges 13 on the outer walls of both sides of the base plate 11, and a connecting bushing 12 fixedly installed on the outer wall of the bottom of the base plate 11. The connecting bushing 12 is connected to the bidirectional moving mechanism of the 3D printer. The moving mechanism can be a screw bearing structure, thereby driving the heated bed mounting frame 1 to move linearly.

[0041] Specifically, the cross-sectional shape of the rolled edge 13 is C-shaped, and the height of the cavity inside the rolled edge 13 is 1-2cm. Since the thickness of the heated bed body 2 is relatively thin, generally 0.5cm, the cavity inside the rolled edge 13 is sufficient to install the heated bed body 2.

[0042] In this embodiment, the heated bed body 2;

[0043] Specifically, the heated bed body 2 includes an aluminum substrate 21. A wiring connector 25 is provided on the outer wall of one side of the aluminum substrate 21. The aluminum substrate 21 is relatively hard, so the flatness requirement of the heated bed body 2 is relatively good. A spring steel plate 22 is provided on the front side of the aluminum substrate 21. The spring steel plate 22 has high hardness and is not easy to deform. Masking tape 23 can be pasted on the front side of the spring steel plate 22. The use of masking tape improves the adhesion of the product during the 3D printing process. At the same time, it is easy to remove the part after shaping. The front side of the spring steel plate 22 can also attract a magnetic plate 24. The magnetic plate 24 is made of magnetic steel material, which further enhances the rigidity of the heated bed body 2 and avoids product warping caused by the heated bed body 2.

[0044] In this embodiment, several tension adjustment components 3 are provided on both sides of the bottom of the heated bed mounting frame 1. The tension adjustment components 3 are used at least to adjust the clamping force of the heated bed body 2.

[0045] Specifically, the tension adjustment component 3 includes a mounting hole 31 on the heated bed mounting bracket 1. A bushing 32 is threaded into the mounting hole 31. A turntable 33 is fixedly mounted on the outer wall of the bottom of the bushing 32. A compression spring 34 is fixedly inserted into the bushing 32. By holding the turntable 33, the operator can rotate the bushing 32 inside the mounting hole 31. With the threaded connection, the height of the bushing 32 inside the mounting hole 31 can be adjusted to adjust the position of the compression spring 34, thereby adjusting the tension of the bottom of the heated bed body 2.

[0046] In this embodiment, several leveling mechanisms 4 are provided on both sides of the top of the heated bed mounting frame 1. The leveling mechanisms 4 are used at least to adjust the flatness of the heated bed body 2.

[0047] Specifically, the leveling mechanism 4 includes a through hole 41 on the heated bed mounting frame 1, and a threaded sleeve 42 located above the through hole 41 is provided on the top of the heated bed mounting frame 1. An adjusting screw 43 is threaded into the inside of the threaded sleeve 42, and an operating head 44 is fixedly provided at the top of the adjusting screw 43. When the heated bed body 2 is unevenly installed, the operator can pinch the operating head 44 at the corresponding protruding position, so that the adjusting screw 43 rotates inside the threaded sleeve 42, thereby pressing down the bottom of the adjusting screw 43 against the protruding part of the heated bed body 2.

[0048] Specifically, the bottom end of the adjusting screw 43 is provided with a spherical groove 45, and a positioning ball 46 is provided inside the spherical groove 45. The top of the heated bed body 2 is provided with a recess that cooperates with the positioning ball 46. When the adjusting screw 43 moves down, it can drive the positioning ball 46 into the recess at the top of the heated bed body 2, so as to better achieve the leveling operation of the heated bed body 2 without damaging the heated bed body 2.

[0049] In this embodiment, a heating module 5 is provided at the bottom of the heated bed body 2. The heating module 5 is used to uniformly heat the heated bed body 2 and keep the heated bed body 2 at a constant temperature.

[0050] Specifically, the heating module 5 is fixedly installed on the back of the aluminum substrate 21. The heating module 5 is composed of several unit modules that are distributed at equal distances, and each unit module is connected in series. The heating module 5, composed of multiple unit modules, improves the heating efficiency of the heated bed body 2. The series structure is more conducive to the subsequent maintenance and replacement of the heating module 5.

[0051] In this embodiment, the bottom of the heated bed body 2 is provided with a heat insulation component 6 covering the outside of the heating module 5. The heat insulation component 6 is used at least to keep the heating temperature of the heating module 5 and reduce the heat loss of the heated bed body 2.

[0052] In this embodiment, the outer walls on both sides of the heated bed mounting frame 1 are provided with slots, and the slots are slidably connected to a limiting member 7. The limiting member 7 is composed of a flat plate and a handle. The operator can slide the flat plate in the rolled edge 13 by using the handle, and can pull the limiting member 7 out from the inside of the rolled edge 13, which is conducive to the installation and use of the heated bed body 2 in the heated bed mounting frame 1.

[0053] In this embodiment, the heated bed body 2 also includes a temperature monitoring module and a temperature display and alarm module. The line connector 25 includes a power supply pin and a pin for transmitting the temperature monitoring module and the temperature display and alarm module. It can use the temperature monitoring module and the temperature display and alarm module to reflect the real-time temperature of the heated bed body 2, display the temperature, and alarm the temperature in a timely manner.

[0054] Working principle: (1) The operator connects the heated bed mounting frame 1 to the 3D printer, so that the heated bed mounting frame 1 can move in both directions in a straight line;

[0055] (2) Next, insert the heated bed body 2 into the inside of the rolled edge 13. At this time, the heated bed body 2 is located above the limiting member 7. After the heated bed body 2 is inserted into the inside of the rolled edge 13, the operator pulls out the limiting member 7 from the side of the heated bed mounting bracket 1, so that the top of the compression spring 34 abuts against the lower surface of the heated bed body 2.

[0056] (3) Using a flatness measuring tool, the flatness of the upper surface of the heated bed body 2 is tested. The leveling mechanism 4 can perform leveling operation on the heated bed body 2. At the same time, the operator can also turn the tension adjustment component 3 to pre-tighten the bottom of the heated bed body 2, ensuring the stability and flatness of the heated bed body 2 on the heated bed mounting frame 1.

[0057] (4) When using the heated bed body 2, aluminum substrate 21, spring steel plate 22 and masking tape 23 can be selectively used. The spring steel plate 22 is placed on the front side of the aluminum substrate 21, and then the masking tape 23 is pasted on the front side of the spring steel plate 22. Alternatively, the spring steel plate 22 can be placed on the front side of the aluminum substrate 21, the magnetic plate 24 can be attracted to the front side of the spring steel plate 22, and then the masking tape 23 can be pasted on the front side of the magnetic plate 24. Both of these methods can ensure the flatness and strength of the heated bed body 2 and facilitate the removal of the product.

[0058] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A structure for heating a heated bed, comprising a heated bed mounting frame (1) and a heated bed body (2), characterized in that, The heated bed mounting bracket (1) is used at least for the fixed installation of the heated bed body (2) on the 3D printer and to enable unidirectional movement of the heated bed body (2); The heated bed mounting frame (1) has several tension adjustment components (3) on both sides of its bottom. The tension adjustment components (3) are used to adjust the clamping force of the heated bed body (2). The tension adjustment components (3) include mounting holes (31) on the heated bed mounting frame (1). A bushing (32) is threaded into the mounting hole (31). A turntable (33) is fixedly installed on the outer wall of the bottom of the bushing (32). A compression spring (34) is fixedly inserted into the bushing (32). The heated bed mounting frame (1) is provided with several leveling mechanisms (4) on both sides of the top. The leveling mechanism (4) is used to adjust the flatness of the heated bed body (2). The leveling mechanism (4) includes a through hole (41) on the heated bed mounting frame (1), and a threaded sleeve (42) is provided on the top of the heated bed mounting frame (1) above the through hole (41). An adjusting screw (43) is threaded into the inside of the threaded sleeve (42), and an operating head (44) is fixedly provided at the top of the adjusting screw (43). A spherical groove (45) is provided at the bottom of the adjusting screw (43), and a positioning ball (46) is provided inside the spherical groove (45). A recessed groove that cooperates with the positioning ball (46) is provided on the top of the heated bed body (2). The bottom of the heated bed body (2) is provided with a heating module (5). The heating module (5) is used to heat the heated bed body (2) evenly and keep the heated bed body (2) at a constant temperature. The heating module (5) is fixedly disposed on the back of the aluminum substrate (21). The heating module (5) is composed of several unit modules that are equally distributed, and each unit module is a series structure. The bottom of the heated bed body (2) is provided with a heat insulation component (6) covering the outside of the heating module (5). The heat insulation component (6) is used at least to keep the heating temperature of the heating module (5) and reduce the heat loss of the heated bed body (2).

2. The structure for heated bed heating according to claim 1, characterized in that, The heated bed mounting frame (1) includes a base plate (11), and the outer walls on both sides of the base plate (11) are provided with integrally formed rolled edges (13), and a connecting bushing (12) is fixedly installed on the outer wall at the bottom of the base plate (11).

3. The structure for heated bed heating according to claim 2, characterized in that, The cross-sectional shape of the rolled edge (13) is C-shaped, and the cavity height inside the rolled edge (13) is 1-2cm.

4. The structure for heated bed heating according to claim 1, characterized in that, The heated bed mounting frame (1) has slots on both sides of its outer wall, and the slots are slidably connected to a limiting member (7), which is composed of a flat plate and a handle.

5. The structure for heated bed heating according to claim 1, characterized in that, The heated bed body (2) includes an aluminum substrate (21), a spring steel plate (22) is provided on the front side of the aluminum substrate (21), and masking tape (23) can be pasted on the front side of the spring steel plate (22), and a magnetic suction plate (24) can also be adsorbed on the front side of the spring steel plate (22).

6. The structure for heated bed heating according to claim 1, characterized in that, The heated bed body (2) also includes a temperature monitoring module and a temperature display and alarm module.

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