High-frequency vibration separation device for 3D printing model

Abstract

The utility model discloses a high-frequency vibration separating device of a 3D printing model. The high-frequency vibration separating device comprises two platform supporting plate components, a printing platform, an ultrasonic fixing plate, an ultrasonic generator and an ultrasonic vibrator. The platform supporting plate component is in an L shape and comprises a horizontal support and a vertical support. The two platform supporting plate components are oppositely and vertically arranged; the ultrasonic fixing plate is horizontally placed, and the two ends of the ultrasonic fixing plate are connected with the horizontal supports of the two platform supporting plate components respectively. The ultrasonic vibrator is inserted in the center of the ultrasonic fixing plate and is connected with the ultrasonic generator; the printing platform is horizontally arranged, and the center of the printing platform is mounted on the top surface of the ultrasonic vibrator; a plurality of strip-shaped holes are formed in the printing platform; the long-strip-shaped holes are distributed in a radial mode with the ultrasonic vibrator as the circle center. According to the utility model, the ultrasonic high-frequency vibration technology is utilized, so that the 3D printing model can be simply and quickly separated from the printing platform, and the 3D printing model cannot be damaged at all.

Description

Technical Field

[0001] The utility model relates to a high-frequency vibration separation device for a 3D printed model, which mainly utilizes high-frequency vibration to separate the 3D printed model and belongs to the technical field of 3D printers. Background Art

[0002] First of all, 3D printing is a technology that uses digital model files as the basis, using powdered metal or plastic, light-cured resin and other bondable materials to construct objects by printing layer by layer. Due to its high molding precision, it is widely used in molds, customized products, medical fixtures, prostheses and other fields.

[0003] Secondly, as an important branch of 3D printing technology, stereolithography (SL) mainly uses lasers of specific wavelength and intensity to irradiate the surface of liquid photosensitive resin to solidify a layer of resin in a specific area of ​​the surface. When a layer is solidified, the printing platform is lowered a certain distance, and a coating scraper is used to evenly cover the solidified layer with a layer of liquid resin, and the next layer is solidified by laser irradiation. This cycle is repeated to finally obtain a three-dimensional model stacked layer by layer. However, during the molding process of the first layer, the liquid resin will adhere to the printing platform while solidifying, resulting in the 3D printed model sticking to the printing platform after printing. Therefore, a certain amount of external force is usually required to remove the model.

[0004] For example: after the 3D model is printed, the technician uses a utility knife or a spatula to manually scrape the 3D model off the printing platform to complete the retrieval operation. Since the contact area between the 3D model attached to the printing platform and the spatula is small, there is a risk of damaging the 3D model. At the same time, manual operation also makes the retrieval efficiency low.

[0005] For another example, Chinese patent with publication number CN108215172A discloses a solution of using a push rod to eject the model, but it also has the following technical defects: 1. Since the through holes of the printing platform need to correspond one-to-one with the push rods of the lifting device, the assembly requirements are relatively high; 2. Especially during use, if the model is accidentally dropped into the lifting device, it is difficult to observe and clean the model due to the immersion of the resin, and it will also cause the relative position of the platform and the lifting device to move; 3. It is usually necessary to drain the resin, remove the debris, and then calibrate the position of the platform and the lifting device, which is very troublesome to operate.

[0006] For another example, a Chinese patent with publication number CN214324201U discloses a solution of using a scraper to push and shovel the loose parts, but it also has the following technical defects: 1. Grooves need to be processed on the printing platform, and the tip of the scraper needs to match the grooves one by one, which makes assembly difficult; 2. Due to the sharp blade, there is a risk of cracking the 3D model during the scraping process.

[0007] Therefore, it is urgent to develop and design a new device that can separate the 3D printed model from the printing platform. Summary of the invention

[0008] In response to the above-mentioned existing technical problems, the utility model provides a high-frequency vibration detachment device for a 3D printed model, which utilizes ultrasonic high-frequency vibration technology to achieve the technical purpose of simply and quickly separating the 3D printed model from the printing platform without causing any damage to the 3D printed model.

[0009] To achieve the above-mentioned purpose, the utility model provides a high-frequency vibration detachment device for a 3D printed model, comprising two platform support plate components, a printing platform, an ultrasonic fixing plate, an ultrasonic generator, and an ultrasonic vibrator;

[0010] The platform support plate component is L-shaped, including a horizontal support and a vertical support; the two platform support plate components are opposite and placed vertically;

[0011] The ultrasonic fixing plate is placed horizontally, and its two ends are respectively connected to the horizontal brackets of the two platform support plate components;

[0012] The ultrasonic vibrator is inserted in the center of the ultrasonic fixing plate and connected to the ultrasonic generator;

[0013] The printing platform is placed horizontally, and its center is mounted on the top surface of the ultrasonic vibrator;

[0014] The printing platform is provided with a plurality of long holes; the long holes are distributed in a radial shape with the ultrasonic vibrator as the center.

[0015] Furthermore, in the utility model, a gap is left between the bottom surface of the printing platform and the top surface of the horizontal bracket of the platform support plate component.

[0016] Furthermore, in the present invention, the gap is 500um.

[0017] Furthermore, in the utility model, the power of the ultrasonic vibrator is 2kw, and the ultrasonic amplitude is 50um.

[0018] Furthermore, in the utility model, a vibrator mounting hole is provided at the center of the ultrasonic fixing plate; and the ultrasonic vibrator is fixed in the vibrator mounting hole.

[0019] The utility model further comprises a locking screw and a screw mounting hole provided in the center of the printing platform; the locking screw fixes the printing platform to the top surface of the ultrasonic vibrator through the screw mounting hole.

[0020] In summary, the utility model utilizes ultrasonic high-frequency vibration technology to simply and quickly separate the 3D printed model from the printing platform without causing any damage to the 3D printed model.

[0021] Compared with existing products, the technical advantages of this utility model are:

[0022] 1. The key technical point of the utility model is to use ultrasonic technology to conveniently vibrate the 3D printed model off the printing platform. In addition, there is currently no similar application in the field of 3D printing.

[0023] 2. The utility model reduces the damage to the model itself during the mechanical separation process, does not require the addition of complex mechanical structure parts, is simple and convenient to operate, and also improves the efficiency of taking out parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a front view structural diagram of the utility model;

[0025] Figure 2 It is an exploded side view of the utility model;

[0026] Figure 3 This is a mechanical analysis diagram of the 3D printing model of the utility model;

[0027] In the figure: 1. Platform support plate component, 2. Printing platform, 21. Screw mounting hole, 22. Long hole, 3. Ultrasonic fixing plate, 31. Vibrator mounting hole, 4. Ultrasonic vibrator, 5. Locking screw, 6. 3D printing model. DETAILED DESCRIPTION

[0028] The present invention is further described below in conjunction with the accompanying drawings. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] In the following description, with reference to the accompanying drawings, several embodiments of the present application are described. It should be understood that other embodiments may also be used, and mechanical composition, structure, electrical and operational changes may be made without departing from the spirit and scope of the present disclosure. The following detailed description should not be considered restrictive, and the scope of the embodiments of the present application is limited only by the claims of the published patents. The terms used here are only to describe specific embodiments and are not intended to limit the present application. Spatially related terms, such as "upper", "lower", "left", "right", "below", "below", "lower", "above", "upper", etc., may be used in the text to facilitate the description of the relationship between an element or feature shown in the figure and another element or feature.

[0030] like Figure 1 and Figure 2 As shown, this embodiment provides a high-frequency vibration detachment device for a 3D printed model, including two platform support plate components 1, a printing platform 2, an ultrasonic fixing plate 3, an ultrasonic generator and an ultrasonic vibrator 4 connected thereto, which are specifically described as follows.

[0031] like Figure 2 As shown, the two platform support plate components 1 are L-shaped, including a horizontal support and a vertical support.

[0032] During specific implementation, the two platform support plate components 1 are placed vertically and opposite to each other, serving as printing moving parts of the 3D printer.

[0033] like Figure 1 and Figure 2 As shown, the ultrasonic fixing plate 3 is placed horizontally, and both ends are respectively connected to the horizontal brackets of the two platform support plate components 1.

[0034] During specific implementation, the ultrasonic fixing plate 3 is fixed across the horizontal brackets of the two platform support components 1, and has the following two functions: on the one hand, it can serve as a reinforcing structural member of the platform support component 1 to make the platform support component 1 more solid; on the other hand, it can also serve as an installation base for the ultrasonic vibrator 4, used to fix the ultrasonic vibrator 4.

[0035] In other embodiments, Figure 1 and Figure 2 As shown, a vibrator mounting hole 31 is provided at the center of the ultrasonic fixing plate 3 for fixing the ultrasonic vibrator 4 connected to the ultrasonic generator.

[0036] During specific implementation, the top end of the ultrasonic vibrator 4 is inserted into the vibrator mounting hole 31 to serve as the vibration source of the utility model.

[0037] In other embodiments, Figure 2As shown, a screw mounting hole 21 is opened at the center of the printing platform 2, and the locking screw 5 fixes the printing platform 2 on the top surface of the ultrasonic vibrator 4 through the screw mounting hole 21.

[0038] In a specific implementation, the platform support plate component 1 and the printing platform 2 constitute a printing moving part, and the printed 3D printing model 6 will be adhered to the printing platform 2, such as Figure 3 In addition, the printing platform 2 is fixed on the ultrasonic vibrator 4 by its center position, so that when the ultrasonic generator drives the ultrasonic vibrator 4 to vibrate, the printing platform 2 will not vibrate too much due to weight imbalance.

[0039] like Figure 2 As shown, the printing platform 2 is placed horizontally, and is provided with a plurality of elongated holes 22. Moreover, the elongated holes 22 are arranged in a radial shape with the ultrasonic vibrator 4 as the vibration source and the screw mounting hole 21 as the center.

[0040] In specific implementation, the long holes 22 have two functions: one is to allow the resin to flow, thereby preventing the resin from accumulating on the printing platform 2 and keeping the 3D printer clean and tidy; the other is not to block the propagation of the ultrasonic vibration amplitude, thereby ensuring the vibration demolding effect of the ultrasonic vibrator 4.

[0041] In other embodiments, there is no fixed connection between the printing platform 2 and the platform support member 1, and in the vertical direction, a small gap is left between the bottom surface of the printing platform 2 and the top surface of the horizontal bracket of the platform support member 1, for example: the gap is reserved for 500um, the purpose is to prevent the printing platform 2 and the support member 1 from colliding and interfering with each other when high-frequency vibration is realized in the utility model, thereby ensuring the effect of vibration demolding.

[0042] In other embodiments, the format size of the printing platform 2 is 384x216mm. In addition, the power and ultrasonic amplitude of the ultrasonic vibrator 4 depend on the size of the printing platform 2. For example, the power of the ultrasonic vibrator 4 is preferably 2kw, and the ultrasonic amplitude is preferably 50um, so that the maximum amplitude of the printing platform 2 reaches about 200um.

[0043] like Figure 3 As shown, the mechanical analysis of the specific implementation of the utility model is as follows: Let M be the mass of the 3D printed model 6; S be the bonding area between the 3D printed model 6 and the printing platform 2; n be the bonding force coefficient; A be the amplitude of the ultrasonic vibration of the ultrasonic vibrator 4; f be the frequency of the ultrasonic vibration of the ultrasonic vibrator 4. Then: the acceleration of vibration is a=4π 2 f 2 A; inertial force F1=Ma=M4π2 f 2 A; Adhesion force F2 = Sn.

[0044] Based on this, the working principle and working process of the utility model are as follows: when printing is completed and the 3D printed model 6 needs to be separated from the printing platform 2, the ultrasonic generator first drives the ultrasonic vibrator 4 to start working and transmits ultrasonic waves and mechanical vibrations to the printing platform 2.

[0045] Then the printing platform 2 starts to vibrate, and at the same time drives the 3D printed model 6 on the platform to vibrate. The frequency f of the high-frequency vibration can reach more than 20KHz, and the acceleration a brought by it can reach more than 1000 gravitational accelerations.

[0046] When the inertial force F1 on the 3D printed model 6 exceeds the adhesive force F2 of the 3D printed model 6, the 3D printed model 6 can be detached from the printing platform 2, thereby completing the removal operation.

[0047] In summary, the utility model utilizes ultrasonic high-frequency vibration technology to simply and quickly separate the 3D printed model 6 from the printing platform 2 without causing any damage to the 3D printed model 6. The vibration demoulding effect is good and is conducive to promotion and use.

[0048] Although the principle of the present invention is described in detail above in conjunction with the preferred embodiments, those skilled in the art should understand that the above embodiments are only explanations of the exemplary implementation of the present invention, and are not intended to limit the scope of the present invention. The details in the embodiments do not constitute limitations on the scope of the present invention. Without departing from the spirit and scope of the present invention, any obvious changes such as equivalent transformations and simple replacements based on the technical solution of the present invention fall within the scope of protection of the present invention.

Claims

1. A high-frequency vibration release device for a 3D printed model, characterized in that: It includes two platform support parts, a printing platform, an ultrasonic fixing plate, an ultrasonic generator, and an ultrasonic vibrator; The platform support plate component is L-shaped, including a horizontal support and a vertical support; the two platform support plate components are opposite and placed vertically; The ultrasonic fixing plate is placed horizontally, and its two ends are respectively connected to the horizontal brackets of the two platform support plate components; The ultrasonic vibrator is inserted in the center of the ultrasonic fixing plate and connected to the ultrasonic generator; The printing platform is placed horizontally, and its center is mounted on the top surface of the ultrasonic vibrator; The printing platform is provided with a plurality of long holes; the long holes are distributed in a radial shape with the ultrasonic vibrator as the center.

2. A high-frequency vibration detachment device for a 3D printed model according to claim 1, characterized in that: A gap is left between the bottom surface of the printing platform and the top surface of the horizontal support of the platform support plate component.

3. A high-frequency vibration detachment device for a 3D printed model according to claim 2, characterized in that: The gap is 500um.

4. The high-frequency vibration release device for a 3D printed model according to claim 1, characterized in that: The power of the ultrasonic vibrator is 2kw, and the ultrasonic amplitude is 50um.

5. The high-frequency vibration release device for a 3D printed model according to claim 1, characterized in that: A vibrator mounting hole is provided at the center of the ultrasonic fixing plate; The ultrasonic vibrator is fixed in the vibrator mounting hole.

6. The high-frequency vibration release device for a 3D printed model according to claim 1, characterized in that: Also includes a locking screw and a screw mounting hole opened in the center of the printing platform; The locking screw fixes the printing platform to the top surface of the ultrasonic vibrator through the screw mounting hole.

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