Hot bed heating structure

Abstract

The invention relates to the field of printers, and discloses a hot bed heating structure which comprises a hot bed mounting frame and a hot bed body, the hot bed mounting frame is at least used for fixedly mounting the hot bed body on a 3D printer, and bidirectional movement of the hot bed body is achieved; a plurality of tightness adjusting assemblies are arranged on the two sides of the bottom of the hot bed mounting frame, and the tightness adjusting assemblies are at least used for adjusting the clamping force of the hot bed body; a plurality of leveling mechanisms are arranged on the two sides of the top of the hot bed mounting frame, and the leveling mechanisms are at least used for adjusting the flatness of the hot bed body; a heating module is arranged at the bottom of the hot bed body and is at least used for uniformly heating the hot bed body and keeping the hot bed body in a constant-temperature state; the bottom of the hot bed body is provided with a heat preservation piece wrapping the heating module. The tightness adjusting assembly and the leveling mechanism are adopted, leveling of the hot bed can be achieved, it can be guaranteed that the hot bed has better flatness, and the product 3D printing quality is improved.

Description

Technical Field

[0001] The invention relates to the technical field of printers, and in particular to a hot bed heating structure. Background Art

[0002] An FDM 3D printer is a machine that uses digital model files as the basis, and uses special wax materials, powdered metals, or plastics and other adhesive materials to print layers of adhesive materials to create FDM 3D models.

[0003] During FDM3D printing, when the molten adhesive material extruded by the print head of the FDM3D printer contacts the printing platform, the temperature of the printing platform is too low, and the FDM3D model printed is easily warped due to thermal expansion and contraction, thus affecting the printing quality. In order to solve this problem, most FDM3D printers currently add a heated bed to the printing platform to keep the printing platform at a certain temperature.

[0004] The hot bed currently used still has problems with flatness, heating and pickup. There is currently a lack of good solutions to the three factors that affect the printing effect caused by the hot bed: flatness, heating and pickup. Therefore, it is urgent to design a hot bed heating structure to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a hot bed heating structure to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions: A hot bed heating structure comprises a hot bed mounting frame and a hot bed body, wherein the hot bed mounting frame is at least used for fixing the hot bed body on a 3D printer and realizing bidirectional movement of the hot bed body; A plurality of tightness adjustment components are arranged on both sides of the bottom of the hot bed mounting frame, and the tightness adjustment components are at least used to adjust the clamping force of the hot bed body; A plurality of leveling mechanisms are provided on both sides of the top of the hot bed mounting frame, and the leveling mechanisms are at least used to adjust the flatness of the hot bed body; A heating module is provided at the bottom of the hot bed body, and the heating module is at least used to uniformly heat the hot bed body and keep the hot bed body at a constant temperature; A heat-insulating component covering the outside of the heating module is arranged at the bottom of the hot bed body, and the heat-insulating component is at least used to insulate the heating temperature of the heating module and reduce the heat loss of the hot bed body.

[0007] Furthermore, the hot bed mounting frame comprises a bottom plate, the outer walls on both sides of the bottom plate are provided with integrally formed curling edges, and a connecting shaft sleeve is fixedly installed on the outer wall at the bottom of the bottom plate.

[0008] Furthermore, the cross-sectional shape of the curled edge is C-shaped, and the height of the cavity inside the curled edge is 1-2 cm.

[0009] Furthermore, sockets are provided on the outer walls on both sides of the hot bed mounting frame, and the inner part of the sockets is slidably plugged with a limiting member, and the limiting member is composed of a flat plate and a handle.

[0010] Furthermore, the hot bed body includes an aluminum base plate, a spring steel plate is arranged on the front of the aluminum base plate, and masking paper can be pasted on the front of the spring steel plate, and the front of the spring steel plate can also adsorb a magnetic plate.

[0011] Furthermore, the heating module is fixedly arranged on the back side of the aluminum substrate, and the heating module is composed of a plurality of unit modules distributed at equal distances, and each unit module is a series structure.

[0012] Furthermore, the tightness adjustment component includes a mounting hole arranged on the hot bed mounting frame, the internal thread of the mounting hole is inserted with a liner ring, a turntable is fixedly arranged on the outer wall of the bottom of the liner ring, and a compression spring is fixedly inserted inside the liner ring.

[0013] Furthermore, the leveling mechanism includes a through hole arranged on the hot bed mounting frame, and a threaded sleeve located above the through hole is arranged on the top of the hot bed mounting frame, an adjusting screw rod is inserted into the internal thread of the threaded sleeve, and an operating head is fixedly arranged on the top of the adjusting screw rod.

[0014] Furthermore, a spherical groove is provided at the bottom end of the adjusting screw rod, and a positioning ball is provided inside the spherical groove, and a sink groove cooperating with the positioning ball is provided at the top of the hot bed body.

[0015] Furthermore, the hot bed body also includes a temperature monitoring module and a temperature display and alarm module.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a structure for heating a hot bed, which uses a tightness adjustment component and a leveling mechanism to achieve leveling of the hot bed, thereby ensuring that the hot bed has better flatness and improving the quality of 3D printing of products. The heating module and insulation components used improve the heating effect and uniformity of the hot bed, while also improving the insulation effect and reducing heat loss. The hot bed uses structures such as an aluminum substrate, a spring steel plate, masking paper, and a magnetic suction plate, and can be used in a variety of ways to avoid adhesion between the product and the hot bed, which is more conducive to taking out the parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0018] Figure 1 A schematic diagram of the structure of a hot bed mounting frame provided for a structural embodiment of hot bed heating of the present invention.

[0019] Figure 2 A schematic diagram of a structure without a hot bed provided in accordance with an embodiment of the present invention for heating a hot bed Figure 1 .

[0020] Figure 3 A schematic diagram of a structure without a hot bed provided in accordance with an embodiment of the present invention for heating a hot bed Figure 2 .

[0021] Figure 4 A front view of a hot bed heating structure embodiment of the present invention without the hot bed structure is provided.

[0022] Figure 5 A partially enlarged structural schematic diagram of a structural embodiment of hot bed heating provided by the present invention.

[0023] Figure 6 A schematic diagram of the heating module and the heat preservation component structure provided for a structural embodiment of hot bed heating of the present invention.

[0024] Figure 7 A schematic diagram of the structure of a hot bed body provided for a structural embodiment of hot bed heating of the present invention.

[0025] Description of reference numerals: 1. Hot bed mounting frame; 11. Bottom plate; 12. Connecting sleeve; 13. Curling; 2. Hot bed body; 21. Aluminum base plate; 22. Spring steel plate; 23. Masking paper; 24. Magnetic plate; 25. Line connector; 3. Tension adjustment assembly; 31. Mounting hole; 32. Bushing; 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 DESCRIPTION

[0026] In order 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.

[0027] like Figure 1-7As shown, a structure for heating a hot bed provided by an embodiment of the present invention comprises a hot bed mounting frame 1 and a hot bed body 2, wherein the hot bed mounting frame 1 is at least used for fixing and mounting the hot bed body 2 on a 3D printer and realizing bidirectional movement of the hot bed body 2; a plurality of tightness adjustment components 3 are arranged on both sides of the bottom of the hot bed mounting frame 1, and the tightness adjustment components 3 are at least used for adjusting the clamping force of the hot bed body 2; a plurality of leveling mechanisms 4 are arranged on both sides of the top of the hot bed mounting frame 1, and the leveling mechanisms 4 are at least used for adjusting the flatness of the hot bed body 2; a heating module 5 is arranged at the bottom of the hot bed body 2, and the heating module 5 is at least used for uniformly heating the hot bed body 2 and keeping the hot bed body 2 at a constant temperature; a heat preservation component 6 covering the outside of the heating module 5 is arranged at the bottom of the hot bed body 2, and the heat preservation component 6 is at least used for heat preservation of the heating temperature of the heating module 5 and reducing the heat loss of the hot bed body 2.

[0028] The present invention provides a structure for heating a hot bed, which uses a tightness adjustment component 3 and a leveling mechanism 4 to achieve leveling of the hot bed, thereby ensuring that the hot bed has better flatness and improving the quality of 3D printing of products. The heating module 5 and the insulation component 6 used improve the heating effect and uniformity of the hot bed, while also improving the insulation effect and reducing heat loss. The hot bed uses structures such as an aluminum substrate 21, a spring steel plate 22, a masking paper 23, and a magnetic suction plate 24, which can be used in a variety of ways to avoid adhesion between the product and the hot bed, which is more conducive to taking out the parts.

[0029] Flatness problem: 3D printing requires that the gap between any position of the hot bed and the working part print head should not exceed 0.1-0.2mm, otherwise the printing operation cannot be carried out normally (if the gap is too large, the material cannot adhere to the substrate, and if the gap is too small or negative, the nozzle will be scratched and damaged). In large and medium sizes (1 square meter to 3 square meters), it is very difficult to ensure the required gap distance between the entire table and the nozzle. Even if the substrate has sufficient strength and does not deform after heating, precision casting milling is required, which is extremely expensive. In actual conditions, the thickness of a large casting flat plate is required to be 30-50mm in order to control the size of thermal deformation. The internal structure design of the hot bed body 2 of the present invention can avoid the above-mentioned problems, ensure the rigidity and flatness of the hot bed body 2 as much as possible, and improve the quality of product printing.

[0030] Heating problem: 3D printing operation requires that the working hot bed can maintain a constant temperature of 40 to 50 degrees Celsius, and the temperature rises and falls rapidly, which is conducive to precise temperature control. Increasing the area of ​​the hot bed while meeting the flatness requirement will increase the heating power, the temperature rises and falls rapidly, and the use and maintenance costs will increase; using the heating module 5 of the present invention, the heating module 5 is composed of a number of unit modules distributed at equal distances, and each unit module is a series structure, and the heat preservation part arranged on the back of the heating module 5 ensures the heating efficiency and heating effect of the hot bed body 2.

[0031] Problem of picking up items: After the existing 3D printer completes printing, the printed items are picked up on the machine. However, picking up large-size printed items is inconvenient due to the interference of the rack space. The hot bed body 2 of the present invention can be quickly disassembled from the hot bed mounting frame 1, and masking paper is provided on the hot bed body 2 to facilitate the operator to pick up items better.

[0032] In this embodiment, a hot bed mounting frame 1 is included, and the hot bed mounting frame 1 is at least used for fixing and mounting the hot bed body 2 on the 3D printer and realizing bidirectional movement of the hot bed body 2; Specifically, the hot bed mounting frame 1 includes a bottom plate 11, and the outer walls on both sides of the bottom plate 11 are provided with integrally formed curling edges 13. A connecting sleeve 12 is fixedly installed on the outer wall at the bottom of the bottom plate 11, and the connecting sleeve 12 is connected to the bidirectional moving mechanism of the 3D printer. The moving mechanism can be a screw bearing structure, thereby driving the hot bed mounting frame 1 to move linearly; Specifically, the cross-sectional shape of the curling edge 13 is C-shaped, and the height of the cavity inside the curling edge 13 is 1-2 cm. Since the thickness of the hot bed body 2 is relatively thin, generally the thickness of the hot bed body 2 is 0.5 cm, the cavity inside the curling edge 13 is sufficient to install the hot bed body 2.

[0033] In this embodiment, the hot bed body 2; Specifically, the hot bed body 2 includes an aluminum base plate 21, and a line connector 25 is arranged on the outer wall of one side of the aluminum base plate 21. The aluminum base plate 21 is relatively hard, and the flatness requirement of the hot bed body 2 is relatively good. A spring steel plate 22 is arranged on the front of the aluminum base plate 21. The spring steel plate 22 has a large hardness and is not easy to deform. Masking paper 23 can be pasted on the front of the spring steel plate 22. The masking paper used improves the adhesion of the product during the 3D printing process, and is convenient for removing the parts after shaping. The front of the spring steel plate 22 can also absorb the magnetic plate 24, and the magnetic plate 24 is made of magnetic steel material, which further enhances the rigidity of the hot bed body 2 and avoids the product warping caused by the hot bed body 2.

[0034] In this embodiment, a plurality of tension adjustment components 3 are provided on both sides of the bottom of the hot bed mounting frame 1, and the tension adjustment components 3 are at least used to adjust the clamping force of the hot bed body 2; Specifically, the tightness adjustment component 3 includes a mounting hole 31 arranged on the hot bed mounting frame 1, a bushing 32 is inserted into the internal thread of the mounting hole 31, a turntable 33 is fixedly arranged on the outer wall of the bottom of the bushing 32, and a compression spring 34 is fixedly inserted into the inside of the bushing 32. The operator can drive the bushing 32 to rotate inside the mounting hole 31 by holding the turntable 33. In the case of threaded connection, the height of the bushing 32 inside the mounting hole 31 is adjusted to adjust the position of the compression spring 34, thereby realizing the adjustment of the tightness of the bottom of the hot bed body 2.

[0035] In this embodiment, a plurality of leveling mechanisms 4 are provided on both sides of the top of the hot bed mounting frame 1, and the leveling mechanisms 4 are at least used to adjust the flatness of the hot bed body 2; Specifically, the leveling mechanism 4 includes a through hole 41 provided on the hot bed mounting frame 1, and a threaded sleeve 42 located above the through hole 41 is provided on the top of the hot bed mounting frame 1, an adjusting screw rod 43 is inserted into the internal thread of the threaded sleeve 42, and an operating head 44 is fixedly provided on the top of the adjusting screw rod 43. When the hot bed body 2 is installed unevenly, the operator can pinch the operating head 44 with his hand at the corresponding raised position, so that the adjusting screw rod 43 rotates inside the threaded sleeve 42, so that the bottom of the adjusting screw rod 43 presses down on the raised part of the hot bed body 2; Specifically, a spherical groove 45 is provided at the bottom end of the adjusting screw rod 43, and a positioning ball 46 is provided inside the spherical groove 45. A sink groove cooperating with the positioning ball 46 is provided at the top of the hot bed body 2. When the adjusting screw rod 43 moves downward, it can drive the positioning ball 46 in the sink groove on the top of the hot bed body 2, so as to better realize the leveling operation of the hot bed body 2 without damaging the hot bed body 2.

[0036] In this embodiment, a heating module 5 is disposed at the bottom of the hot bed body 2, and the heating module 5 is at least used to uniformly heat the hot bed body 2 and keep the hot bed body 2 at a constant temperature; Specifically, the heating module 5 is fixedly arranged on the back side of the aluminum substrate 21. The heating module 5 is composed of a number of unit modules distributed at equal distances, and each unit module is a series structure. The heating module 5 composed of a plurality of unit modules is arranged to improve the heating efficiency of the hot bed body 2. The series structure is more conducive to the subsequent maintenance and replacement of the heating module 5.

[0037] In this embodiment, a heat-insulating member 6 covering the outside of the heating module 5 is disposed at the bottom of the hot bed body 2 . The heat-insulating member 6 is at least used to insulate the heating temperature of the heating module 5 to reduce heat loss of the hot bed body 2 .

[0038] In this embodiment, sockets are provided on the outer walls on both sides of the hot bed mounting frame 1, and the inner part of the sockets is slidably inserted with a limit member 7, which is composed of a flat plate and a handle. The operator can drive the flat plate to slide in the curling edge 13 through the handle, and can pull the limit member 7 out from the inside of the curling edge 13, which is beneficial to the installation and use of the hot bed body 2 in the hot bed mounting frame 1.

[0039] In this embodiment, the heated bed body 2 further 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. The temperature monitoring module and the temperature display and alarm module can be used to timely reflect the real-time temperature of the heated bed body 2, the temperature display and the temperature alarm function.

[0040] Working principle: (1) The operator connects the hot bed mounting frame 1 to the 3D printer so that the hot bed mounting frame 1 can move in a bidirectional linear manner; (2) Then, the hot bed body 2 is inserted into the inside of the curling edge 13. At this time, the hot bed body 2 is located above the stopper 7. After the hot bed body 2 is completely inserted into the inside of the curling edge 13, the operator pulls out the stopper 7 from the side of the hot bed mounting frame 1, so that the top end of the compression spring 34 contacts the lower surface of the hot bed body 2. (3) Using a flatness measuring tool, the flatness of the upper surface of the hot bed body 2 is detected, and the leveling mechanism 4 can realize the leveling operation of the hot bed body 2. At the same time, the operator can also twist the tightness adjustment component 3 to use the tightness adjustment component 3 to pre-tighten the bottom of the hot bed body 2, thereby ensuring the stability and flatness of the hot bed body 2 on the hot bed mounting frame 1; (4) When the hot bed body 2 is in use, the aluminum substrate 21, the spring steel plate 22 and the masking paper 23 can be selectively used. The spring steel plate 22 is placed on the front of the aluminum substrate 21, and the masking paper 23 is then pasted on the front of the spring steel plate 22. Alternatively, the spring steel plate 22 can be placed on the front of the aluminum substrate 21, the magnetic plate 24 can be adsorbed on the front of the spring steel plate 22, and the masking paper 23 can be pasted on the front of the magnetic plate 24. Both of the above methods can ensure the flatness and strength of the hot bed body 2, and are also convenient for removing the product.

[0041] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that 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 above 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 hot bed heating structure, comprising a hot bed mounting frame (1) and a hot bed body (2), characterized in that: The hot bed mounting frame (1) is at least used for fixing the hot bed body (2) on the 3D printer and realizing bidirectional movement of the hot bed body (2); A plurality of tension adjustment components (3) are arranged on both sides of the bottom of the hot bed mounting frame (1), and the tension adjustment components (3) are at least used to adjust the clamping force of the hot bed body (2); A plurality of leveling mechanisms (4) are provided on both sides of the top of the hot bed mounting frame (1), and the leveling mechanisms (4) are at least used to adjust the flatness of the hot bed body (2); A heating module (5) is arranged at the bottom of the hot bed body (2), and the heating module (5) is at least used to evenly heat the hot bed body (2) and keep the hot bed body (2) in a constant temperature state; A heat-insulating component (6) covering the outside of the heating module (5) is provided at the bottom of the hot bed body (2); the heat-insulating component (6) is at least used to insulate the heating temperature of the heating module (5) and reduce heat loss of the hot bed body (2).

2. A hot bed heating structure according to claim 1, characterized in that: The hot bed mounting frame (1) comprises a bottom plate (11), the outer walls on both sides of the bottom plate (11) are provided with integrally formed curling edges (13), and a connecting shaft sleeve (12) is fixedly mounted on the outer wall at the bottom of the bottom plate (11).

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

4. A hot bed heating structure according to claim 1, characterized in that: Sockets are provided on the outer walls of both sides of the hot bed mounting frame (1), and the inner part of the sockets is slidably plugged with a limiting member (7), wherein the limiting member (7) is composed of a flat plate and a handle.

5. The hot bed heating structure according to claim 1, characterized in that: The hot bed body (2) comprises an aluminum base plate (21), a spring steel plate (22) is arranged on the front of the aluminum base plate (21), a masking paper (23) can be pasted on the front of the spring steel plate (22), and a magnetic attraction plate (24) can be adsorbed on the front of the spring steel plate (22).

6. A hot bed heating structure according to claim 5, characterized in that: The heating module (5) is fixedly arranged on the back side of the aluminum substrate (21), and the heating module (5) is composed of a plurality of unit modules distributed at equal distances, and each unit module is a series structure.

7. The hot bed heating structure according to claim 1, characterized in that: The tension adjustment assembly (3) comprises a mounting hole (31) arranged on the hot bed mounting frame (1), a bushing (32) being inserted into the internal thread of the mounting hole (31), a rotating disk (33) being fixedly arranged on the outer wall of the bottom of the bushing (32), and a compression spring (34) being fixedly inserted into the interior of the bushing (32).

8. The hot bed heating structure according to claim 1, characterized in that: The leveling mechanism (4) comprises a through hole (41) arranged on the hot bed mounting frame (1), and a threaded sleeve (42) located above the through hole (41) is arranged on the top of the hot bed mounting frame (1), an adjusting screw rod (43) is inserted into the internal thread of the threaded sleeve (42), and an operating head (44) is fixedly arranged on the top of the adjusting screw rod (43).

9. A hot bed heating structure according to claim 8, characterized in that: The bottom end of the adjusting screw rod (43) is provided with a spherical groove (45), and a positioning ball (46) is provided inside the spherical groove (45); the top of the hot bed body (2) is provided with a sink groove that matches the positioning ball (46).

10. A hot bed heating structure according to claim 1, characterized in that: The hot bed body (2) also includes a temperature monitoring module and a temperature display and alarm module.

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