Improved 3D printer hot bed

Abstract

The utility model relates to the technical field of 3D printing, and discloses an improved 3D printer hot bed which comprises a hot bed body, a heat conduction base plate and heat preservation cotton, a contact rod and a spring pressure sensor are arranged at the bottom of the hot bed body, POM isolation columns are fixedly installed on the two sides of the heat conduction base plate respectively, and two sets of U-shaped grooves are formed in the two sides of the heat preservation cotton respectively. According to the improved 3D printer hot bed, by means of the heat conduction base plate, when the hot bed serves as a printing platform for 3D printing, the temperature generated by printing can be rapidly conducted, then the printing temperature change can be rapidly homogenized, and the uniform attachment effect of a first layer is guaranteed; and the change of the planeness of the four corners can be sensed through POM isolation columns, contact rods and spring pressure sensors, and the problems that warping and stripping phenomena are caused by the influence change of the planeness, then the printing precision of a subsequent layer is influenced, and interlayer dislocation, size deviation, even printing failure and the like occur to a printed piece are solved.

Description

Technical Field

[0001] This utility model relates to the field of 3D printing technology, specifically to an improved heated bed for a 3D printer. Background Technology

[0002] With the rapid development of 3D printing technology, it has been widely used in many fields such as industrial manufacturing, prototype development, education and scientific research, and creative design. 3D printers build three-dimensional objects by stacking materials layer by layer, and the heated bed, as the printing platform, plays a crucial role in the entire printing process.

[0003] However, in actual operation, the inventors found that the following problems still exist: the flatness of the heated bed directly affects the quality and success rate of 3D printing. If the flatness of the heated bed is not good during the printing process, it will lead to uneven adhesion of the first layer, and some areas may experience warping or peeling, which will affect the printing accuracy of subsequent layers, causing problems such as interlayer misalignment, dimensional deviation, or even printing failure. Especially when printing high-precision, large-size models or models with strict surface quality requirements, even small deviations in the flatness of the heated bed may be amplified, seriously reducing the quality and performance of the printed product.

[0004] Therefore, in order to overcome these problems and improve the printing quality and reliability of 3D printers, there is an urgent need for an effective hotbed flatness optimization solution. This solution can be achieved by improving the design, manufacturing process, installation and commissioning methods of the hotbed, as well as introducing real-time monitoring and adjustment mechanisms, to ensure that the hotbed maintains good flatness throughout the entire printing lifecycle, thereby promoting the further development and application of 3D printing technology in various fields. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides an improved 3D printer heated bed, which features a thermally conductive substrate and insulation cotton to enable rapid heating. It is mounted on a safe and reliable plane via a special material isolation column. Furthermore, it utilizes a pressure switch and spring mechanism to achieve the advantages of heated bed leveling and calibration, thus solving the problems mentioned in the background technology.

[0006] This utility model provides the following technical solution: an improved 3D printer heated bed, including a heated bed, a thermally conductive substrate and thermal insulation cotton. The bottom of the heated bed is provided with a contact rod and a spring pressure sensor. POM isolation columns are fixedly installed on both sides of the thermally conductive substrate. Two sets of U-shaped grooves are opened on both sides of the thermal insulation cotton. The inside of the U-shaped grooves is in contact with the outer arc surface of the POM isolation columns.

[0007] Preferably, the number of spring pressure sensors is two sets, and the two sets of spring pressure sensors are diagonally distributed on the lower surface of the heated bed.

[0008] Preferably, there are two sets of contact rods, and the two sets of contact rods are diagonally distributed on the lower surface of the heated bed.

[0009] Preferably, the two sets of POM isolation pillars are located on both sides of the thermally conductive substrate and are diagonally distributed.

[0010] Preferably, the thickness of the insulation cotton is greater than the thickness of the heated bed, and the thickness of the thermally conductive substrate is less than the thickness of the heated bed and the insulation cotton.

[0011] Preferably, the heated bed has two thicknesses: 6mm and 8mm.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] This improved 3D printer's heated bed utilizes a thermally conductive substrate and insulation cotton to rapidly heat up during 3D printing. Special POM (Polymer Oxide) isolation pillars are mounted on a safe and reliable plane. Two sets of diagonally positioned contact rods and two sets of diagonally positioned spring pressure sensors ensure the heated bed is leveled and calibrated. The insulation cotton slows down the rate of heat loss during 3D printing. The thermally conductive substrate rapidly conducts the heat generated during printing, ensuring rapid and uniform temperature changes and guaranteeing uniform adhesion of the first layer. Furthermore, the POM isolation pillars, contact rods, and spring pressure sensors detect changes in the flatness of the four corners, preventing warping and peeling caused by flatness variations. These changes can affect the printing accuracy of subsequent layers, leading to problems such as interlayer misalignment, dimensional deviations, or even printing failure. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the device of this utility model;

[0015] Figure 2 This is a schematic diagram showing the flatness data of the 6mm thick heated bed of this utility model;

[0016] Figure 3 This is a schematic diagram showing the flatness data of the 8mm thick heated bed of this utility model.

[0017] In the diagram: 1. Heated bed; 2. Thermally conductive substrate; 3. Insulation cotton; 4. POM isolation column; 5. Contact rod; 6. Spring pressure sensor. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figure 1-3 An improved 3D printer heated bed includes a heated bed 1, a thermally conductive substrate 2, and insulation cotton 3. The heated bed 1 has contact rods 5 and spring pressure sensors 6 at its bottom. POM isolation columns 4 are fixedly installed on both sides of the thermally conductive substrate 2. Two sets of U-shaped grooves are formed on both sides of the insulation cotton 3, with the interior of the U-shaped grooves fitting against the outer arc surface of the POM isolation columns 4. The thermally conductive substrate 2 and insulation cotton 3 allow the heated bed 1 to heat up rapidly during 3D printing. The POM isolation columns 4, made of a special material, are installed on a safe and reliable plane. Two sets of diagonally arranged contact rods 5 and two sets of diagonally arranged spring pressure sensors 6 are used for heated bed leveling and calibration. The insulation cotton 3 ensures a slower rate of temperature loss during 3D printing. The thermally conductive substrate 2 allows for rapid heat conduction when using the heated bed 1 as a printing platform for 3D printing. This allows for rapid and uniform temperature changes during printing, ensuring uniform adhesion of the first layer. Furthermore, the POM isolation pillars 4, contact rods 5, and spring pressure sensors 6 can detect changes in the flatness of the four corners, preventing warping and peeling caused by changes in flatness. These changes can negatively impact the printing accuracy of subsequent layers, leading to issues such as interlayer misalignment, dimensional deviations, or even printing failures. Two sets of spring pressure sensors 6 are located diagonally on the lower surface of the heated bed 1. Two sets of contact rods 5 are also located diagonally on the lower surface of the heated bed 1. Two sets of POM isolation pillars 4 are located on both sides of the thermally conductive substrate 2, also diagonally. The thickness of the insulation cotton 3 is greater than that of the heated bed 1, while the thickness of the thermally conductive substrate 2 is less than that of both the heated bed 1 and the insulation cotton 3. The heated bed 1 has two thicknesses: 6mm and 8mm.

[0020] Please see Figure 2 and Figure 3 Analysis of the flatness data of 6mm and 8mm heated bed 1 shows that heated bed 1 will deform during the heating process. Compared with the normal temperature state, the amount of deformation after heating is less than 0.3mm. The 0.3mm can be compensated by algorithm during the printing process.

[0021] The working principle is that the heated bed 1 can be rapidly heated during the 3D printing process through the heat-conducting substrate 2 and the heat-insulating cotton 3. Then, it is installed on a safe and reliable plane through the POM isolation column 4 made of special material. Finally, the heated bed is leveled and calibrated by two sets of diagonally arranged contact rods 5 and two sets of diagonally arranged spring pressure sensors 6.

[0022] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0023] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An improved 3D printer hot bed, characterized in that, Including hot bed (1), heat-conducting base plate (2) and heat preservation cotton (3), the bottom of the hot bed (1) is provided with contact rod (5) and spring pressure sensor (6), both sides of the heat-conducting base plate (2) are respectively fixedly installed with POM isolation column (4), both sides of the heat preservation cotton (3) are respectively provided with two groups of U-shaped grooves, and the inside of the U-shaped groove is combined with the outer arc surface of the POM isolation column (4).

2. The improved 3D printer hot bed of claim 1, wherein: The number of the spring pressure sensor (6) is two groups, and two groups of the spring pressure sensor (6) are diagonally distributed on the lower surface of the hot bed (1).

3. The improved thermal bed for 3D printer according to claim 1, wherein: The number of the contact rod (5) is two groups, and two groups of the contact rod (5) are diagonally distributed on the lower surface of the hot bed (1).

4. The improved 3D printer hot bed of claim 1, wherein: Two groups of the POM isolation column (4) are located on both sides of the heat-conducting base plate (2) and are diagonally distributed.

5. The improved 3D printer hot bed of claim 1, wherein: The thickness value of the heat preservation cotton (3) is greater than the thickness value of the hot bed (1), and the thickness value of the heat-conducting base plate (2) is less than the thickness value of the hot bed (1) and the heat preservation cotton (3).

6. The improved 3D printer hot bed of claim 1, wherein: The thickness value of the hot bed (1) is two specifications of 6mm and 8mm.

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