A flexible and adjustable LCD 3D printer screen heat insulation system and LCD 3D printer

Abstract

A flexible and adjustable LCD 3D printer screen heat insulation system includes a liquid crystal screen, a screen mounting plate, a heat dissipation fan, a matrix light source, a heat dissipation substrate and a mounting base, wherein the liquid crystal screen is mounted on the screen mounting plate, the matrix light source is mounted on the heat dissipation substrate and fixed directly below the liquid crystal screen, the screen mounting plate is mounted above the mounting base, and the heat dissipation substrate is mounted below the mounting base, wherein: a flexible and adjustable screen heat insulation system is also included. By using the present invention, the heat absorbed by the liquid crystal screen of the LCD 3D printer during the printing process can be reduced from the source, and then the heat can be dissipated in conjunction with the heat dissipation fan, which can effectively achieve the purpose of reducing the screen temperature and extending the service life of the screen.

Description

Technical Field

[0001] The present invention relates to the technical field of 3D printers, and in particular to a flexible and adjustable LCD 3D printer screen heat insulation system and an LCD 3D printer. Background Art

[0002] LCD3D printer is a 3D printer that uses the principle of liquid resin photocuring. It uses LCD imaging technology. Under the drive of the computer and display driver circuit, the computer program first discretizes the three-dimensional model into layers of plane graphics, and then the display driver circuit controls the LCD screen to convert the specified position of the screen into a transparent area corresponding to the plane graphics (other areas remain opaque black), so that the ultraviolet light source below the LCD screen can pass through the LCD screen and irradiate the liquid resin above the transparent area, and the resin undergoes a curing reaction to become solid. The opaque area of ​​the LCD screen blocks the ultraviolet light in the non-curing area, so that the resin in other positions remains liquid, so that the layers are stacked to finally get the product we want. The light source used by LCD is mostly high-frequency ultraviolet light with great radiation energy. Under its continuous irradiation, the LCD screen will absorb a lot of heat, causing the temperature to rise. The allowable temperature range of the LCD screen is basically between 0~50°. If it is higher than this temperature range, the life of the LCD screen will be greatly shortened or even scrapped.

[0003] In order to solve the problem of high temperature of LCD screen and extend the service life of LCD screen, LCD printers are equipped with various cooling systems. There are two commonly used types at present. One is air cooling, which uses a fan to speed up the air flow around the screen and take away part of the heat of the screen; the other is water cooling, which installs a cooling plate with a liquid flow channel under the screen to absorb the heat of the LCD screen through the cooling medium. However, the above methods have the following problems: air cooling uses air flow, but the thermal conductivity of air itself is very low, resulting in the heat absorbed by the screen cannot be transferred to the air and taken away in time; water cooling will conduct heat much faster, but the complex flow channel structure and flowing liquid medium inside the cooling plate will inevitably cause the projection angle of ultraviolet light to deflect when passing through the cooling plate, thereby affecting the dimensional accuracy of the solidification.

[0004] Moreover, both of the above methods are passive heat dissipation, that is, after the screen absorbs a large amount of heat, various methods are used to reduce the heat of the screen. Therefore, how to change this passive remedy mode, shift the technical focus from the heat dissipation after the LCD screen absorbs heat and heats up to the stage of the LCD screen absorbing heat and heating up, and directly reduce the heat absorbed by the LCD screen from the source, so as to maintain a lower temperature of the screen, has become an important technical problem to be solved by those skilled in the art. Summary of the invention

[0005] The purpose of the present invention is to provide a flexible and adjustable LCD 3D printer screen heat insulation system, which can minimize the high-frequency ultraviolet light irradiated on the liquid crystal screen during the printing process, reduce the heat absorbed by the liquid crystal screen from the source, and then cooperate with the heat dissipation device to dissipate heat, so as to effectively improve the technical problem of first absorbing heat and then cooling in the prior art, resulting in poor heat dissipation effect.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a flexible and adjustable LCD 3D printer screen insulation system, comprising a liquid crystal screen, a screen mounting plate, a cooling fan, a matrix light source, a heat dissipation substrate and a mounting base, wherein the liquid crystal screen is mounted on the screen mounting plate, the matrix light source is mounted on the heat dissipation substrate and fixed directly below the liquid crystal screen, the screen mounting plate is mounted above the mounting base, and the heat dissipation substrate is mounted below the mounting base, wherein: it also includes a flexible and adjustable screen insulation system, and the screen insulation system includes a control device, a drive device and a heat insulation board.

[0007] Furthermore, the heat insulation board is installed in parallel between the matrix light source and the liquid crystal screen, and the extension area of ​​the heat insulation board can be flexibly adjusted.

[0008] Furthermore, during the printing process of each layer of the LCD 3D printer, the control device can calculate the area of ​​the heat insulation board that needs to be unfolded according to the range of the non-transparent area of ​​the liquid crystal screen.

[0009] Furthermore, the driving device can receive instructions from the control device to drive the heat insulation board to extend and contract in the horizontal direction to cover the area outside the transparent area of ​​the liquid crystal screen.

[0010] Furthermore, the heat dissipation fan comprises an upper and lower layer, wherein the upper layer fan is responsible for dissipating heat for the space above the heat insulation board, and the lower layer fan is responsible for dissipating heat for the space below the heat insulation board.

[0011] The object of the present invention is to provide an LCD 3D printer, comprising the flexible and adjustable screen heat insulation system.

[0012] Compared with the prior art, the present invention has a flexible and adjustable screen heat insulation system. Through the screen heat insulation system, the disadvantage of the traditional LCD 3D printer that no matter what size of model is printed, the entire LCD screen is completely exposed above the matrix light source and is continuously irradiated by high-frequency ultraviolet light throughout the process, resulting in excessive temperature of the LCD screen. Moreover, the shielding area of ​​the heat insulation system is flexible and adjustable, and can automatically expand and contract according to the size of the non-transparent area of ​​the LCD screen when each layer is printed, ensuring that only the ultraviolet light in the transparent area can irradiate the LCD screen, and the high-frequency ultraviolet light in the remaining non-molding areas is blocked by the screen heat insulation system screen, thus reducing the heat energy absorbed by the LCD screen during the printing process from the root, and then cooperating with the heat dissipation fan to dissipate heat, which can effectively achieve the purpose of reducing the screen temperature and extending the service life of the screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 It is an overall front view of an embodiment of the present invention.

[0015] Figure 2 It is an overall axonometric view of an embodiment of the present invention.

[0016] Figure 3 This is a diagram of the internal structure of an embodiment of the present invention (hiding the outer shell and the LCD screen mounting plate).

[0017] Figure 4 It is a schematic diagram of the structure of the flexible adjustable thermal insulation system itself according to an embodiment of the present invention.

[0018] Figure 5 for Figure 1 Cross-sectional view of A-A in the figure (when curing large-size models, the red area is the actual size of the LCD screen, the irregular filling area in the middle is the area that needs to be cured in this layer, and the green area is the area blocked by the heat insulation board).

[0019] Figure 6 for Figure 1 Cross-sectional view of A-A in the figure (when curing a small-size model, the red area is the actual size of the LCD screen, the irregular filling area in the middle is the area that needs to be cured in this layer, and the green area is the area blocked by the heat insulation board).

[0020] Figure 7 This is a control logic diagram of the flexible adjustable thermal insulation system according to an embodiment of the present invention. DETAILED DESCRIPTION

[0021] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0023] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] The present invention is further described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0025] See also Figures 1 to 6 As shown, this embodiment provides a flexible and adjustable LCD 3D printer screen insulation system, including a liquid crystal screen 1, a screen mounting plate 4, a cooling fan 3, a matrix light source 8, a heat dissipation substrate 9 and a mounting base 2, wherein the liquid crystal screen 1 is mounted on the screen mounting plate 4, the matrix light source 8 is mounted on the heat dissipation substrate 9 and fixed directly below the liquid crystal screen 1, the screen mounting plate 4 is mounted above the mounting base 2, and the heat dissipation substrate 9 is mounted below the mounting base 2, wherein: it also includes a flexible and adjustable screen insulation system 7, and the screen insulation system 7 includes a control device 12, a drive device 11 and a heat insulation board 10.

[0026] Furthermore, the heat insulation board 10 is installed in parallel between the matrix light source 8 and the liquid crystal screen 1 , and the coverage area of ​​the heat insulation board 10 can be flexibly adjusted.

[0027] Furthermore, during the printing process of each layer of the LCD 3D printer, the control device 12 of the screen insulation system 7 can calculate the area that the insulation board 10 needs to cover according to the range of the transparent area on the liquid crystal screen.

[0028] Furthermore, the driving device 11 of the heat insulation system 7 can receive a pulse instruction issued by the control device 12 to drive the heat insulation board 10 to expand and contract in the horizontal direction to cover the non-transparent area on the liquid crystal screen 1 that does not participate in the curing molding.

[0029] Furthermore, the heat dissipation fan 3 includes two layers, the upper layer fan 5 is responsible for dissipating heat for the space above the heat insulation board 10 , and the lower layer fan 6 is responsible for dissipating heat for the space below the heat insulation board 10 .

[0030] The object of the present invention is to provide an LCD 3D printer, comprising the flexibly adjustable screen heat insulation system 7.

[0031] During the printing process, the control logic of the screen insulation system 7 is as follows Figure 7 As shown: when curing each layer of resin, the control device 12 of the screen insulation system 7 first reads the image data of this layer provided by the computer program, inversely calculates the size of the non-transparent area of ​​the liquid crystal screen 1, and compares it with the current extension state of the insulation board 10 to see whether the shielding requirement is met. If not, a pulse instruction is output to the driving device 11. After receiving the instruction, the driving device 11 rotates forward or reversely to drive the insulation board 10 to extend or contract accordingly, so that the insulation board 10 completes the shielding of the non-transparent area of ​​the liquid crystal screen 1.

[0032] In this way, in the subsequent curing process of the layer of resin, only the transparent area of ​​the LCD screen 1 is exposed to the irradiation of the matrix light source 8, and the high-frequency ultraviolet light passes through the transparent area of ​​the LCD screen 1 and irradiates the liquid resin to complete the curing of the resin, while the high-frequency ultraviolet light and the heat carried by other non-transparent areas are blocked under the heat insulation board 10 and cannot irradiate the LCD screen 1, which fundamentally reduces the heat absorbed by the LCD screen 1 during the curing process to the maximum extent. Finally, the upper cooling fan 5 and the lower cooling fan 6 transfer the heat above and below the heat insulation board 10 to the outside of the machine respectively, thereby achieving the purpose of reducing the temperature of the LCD screen 1 and extending its service life.

[0033] In this embodiment, the heat insulation board 10 is composed of four separate heat insulation boards, which are extended and contracted simultaneously in the four directions of front, back, left and right below the LCD screen 1 to shield the non-transparent area of ​​the LCD screen 1. Other numbers of heat insulation boards can also be combined to achieve the same effect.

[0034] This embodiment provides an LCD 3D printer, including a flexible and adjustable LCD 3D printer screen heat insulation system. Compared with the prior art, the LCD 3D printer has the above advantages, which will not be described in detail here.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A flexible and adjustable LCD 3D printer screen insulation system, characterized in that: include: A liquid crystal screen, a screen mounting plate, a cooling fan, a matrix light source, a cooling substrate and a mounting base, wherein the liquid crystal screen is mounted on the screen mounting plate, the matrix light source is mounted on the cooling substrate and fixed directly below the liquid crystal screen, the screen mounting plate is mounted above the mounting base, and the cooling substrate is mounted below the mounting base, wherein: a flexible and adjustable screen heat insulation system is also included, and the screen heat insulation system includes a control device, a drive device and a heat insulation board.

2. The flexible and adjustable LCD 3D printer screen heat insulation system according to claim 1, characterized in that: The heat insulation board is installed in parallel between the matrix light source and the liquid crystal screen, and the coverage area of ​​the heat insulation board can be flexibly adjusted.

3. The flexible and adjustable LCD 3D printer screen heat insulation system according to claim 1, characterized in that: During the printing process of each layer of the LCD 3D printer, the control device can calculate the area of ​​the heat insulation board that needs to be unfolded according to the range of the non-transparent area on the liquid crystal screen.

4. The flexible and adjustable LCD 3D printer screen heat insulation system according to claim 1, characterized in that: The driving device can receive instructions from the control device to drive the heat insulation board to extend and contract in the horizontal direction to cover the area outside the transparent area of ​​the liquid crystal screen.

5. The flexible and adjustable LCD 3D printer screen heat insulation system according to claim 1, characterized in that: The heat dissipation fan comprises an upper and lower layer. The upper heat dissipation fan is responsible for dissipating heat to the space above the heat insulation board, and the lower heat dissipation fan is responsible for dissipating heat to the space below the heat insulation board.

6. An LCD 3D printer, characterized in that: The invention comprises the flexible and adjustable LCD 3D printer screen heat insulation system as described in any one of claims 1 to 5.

Images