3D printing structure and printing method

Abstract

The invention relates to the technical field of 3D printing, in particular to a 3D printing structure and a printing method.The printing structure comprises a limiting mechanism, a forming groove, a light-transmitting bottom plate arranged at the bottom end of the forming groove, a projection mechanism located below the light-transmitting bottom plate and an air supply mechanism; when the air supply mechanism outputs positive pressure air to drive the light-transmitting bottom plate to protrude, the limiting mechanism reduces the protruding height of the light-transmitting bottom plate through pulling or blocking. According to the 3D printing structure and the printing method, the protruding height of the light-transmitting bottom plate is reduced by arranging the limiting mechanism, and therefore the printing effect is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of 3D printing, and in particular to a 3D printing structure and a printing method. Background Art

[0002] CLIP (Continued Liquid Phase Interface Curing Technology) is an improved SLA (Photosensitive Curing 3D Printing Technology). It generally uses polytetrafluoroethylene as a light-transmitting base plate and projects from the bottom to cure the photosensitive resin. The part that does not need to be cured is controlled by controlling oxygen as an inhibitor of the photosensitive resin to form a dead zone, which inhibits the photocuring reaction and maintains a stable liquid area. This ensures the continuity of curing and realizes efficient continuous liquid phase interface production.

[0003] Generally speaking, the formation of the dead zone requires the use of an air supply mechanism to pressurize oxygen to make it penetrate from the bottom to the top of the transparent base plate. Since the oxygen permeability of the transparent base plate is low and the transparent base plate is made of flexible material, it is easy for the transparent base plate to bulge upwards during this process. Once the height of the transparent base plate bulges too high, it will affect the curing and printing effects. Summary of the invention

[0004] In order to overcome the shortcomings and deficiencies in the prior art, an object of the present invention is to provide a 3D printing structure and a printing method, which can reduce the raised height of the light-transmitting bottom plate by setting a limiting mechanism, thereby improving the printing effect.

[0005] The present invention is achieved through the following technical solutions: In a first aspect, the present invention discloses a 3D printing structure, including a limiting mechanism, a molding groove, a light-transmitting bottom plate arranged at the bottom end of the molding groove, a projection mechanism located below the light-transmitting bottom plate, and an air supply mechanism; When the gas supply mechanism outputs positive pressure gas to drive the light-transmitting bottom plate to bulge, the limiting mechanism reduces the bulging height of the light-transmitting bottom plate by pulling or blocking.

[0006] In combination with the first aspect, further, the limiting mechanism includes a plurality of filamentary structures, and the plurality of filamentary structures are all attached to or located on the upper end surface of the light-transmitting bottom plate.

[0007] In combination with the first aspect, further, the limiting mechanism includes a plurality of filamentary structures, and the plurality of filamentary structures are all adhered to the lower end surface of the light-transmitting bottom plate.

[0008] In combination with the first aspect, further, the limiting mechanism includes a plurality of filamentary structures, and the plurality of filamentary structures are embedded in the interior of the light-transmitting bottom plate to form an integrally formed structure.

[0009] In combination with the first aspect, further, the plurality of filamentary structures are parallel or mesh structures.

[0010] In combination with the first aspect, further, the filamentary structure is one or more of stainless steel wire, copper wire, carbon fiber wire, and Kevlar wire.

[0011] In combination with the first aspect, further, the air supply mechanism is an oxygen supply mechanism, and the light-transmitting bottom plate is an oxygen-permeable membrane.

[0012] In a second aspect, the present invention further discloses a CLIP printing method, which comprises the following steps: Assemble and install the limit mechanism and the light-transmitting bottom plate; The UV lamp irradiates the bottom of the light-transmitting bottom plate, and the gas supply mechanism simultaneously pressurizes the gas so that it penetrates from the bottom end to the top end of the light-transmitting bottom plate; The limiting mechanism pulls or blocks the light-transmitting bottom plate through stress and rigidity to reduce the bulging height of the light-transmitting bottom plate.

[0013] Beneficial effects of the present invention: A 3D printing structure and printing method of the present invention are provided with a limiting mechanism. When the air supply mechanism pressurizes oxygen to make it pass through from the bottom end to the top end of the transparent bottom plate, the limiting mechanism pulls or blocks the transparent bottom plate through stress and rigidity, thereby reducing the bulge height of the transparent bottom plate and ensuring the curing and printing effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention is further described using the accompanying drawings, but the embodiments in the accompanying drawings do not constitute any limitation to the present invention. A person skilled in the art can obtain other drawings based on the following drawings without creative work.

[0015] Figure 1 This is a schematic diagram of the structure of Example 1 of the present invention.

[0016] Figure 2 It is a partial enlarged view of the limiting mechanism and the light-transmitting bottom plate of Example 1 of the present invention.

[0017] Figure 3 It is a partial enlarged view of the limiting mechanism and the light-transmitting bottom plate of Example 2 of the present invention.

[0018] Figure 4 It is a partial enlarged view of the limiting mechanism and the light-transmitting bottom plate of Example 3 of the present invention.

[0019] Figure 5 It is a partial enlarged view of the limiting mechanism and the light-transmitting bottom plate of Example 4 of the present invention.

[0020] Reference numerals Forming groove--101, light-transmitting bottom plate--102, projection mechanism--103, air supply mechanism--104, limiting mechanism--105. DETAILED DESCRIPTION

[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[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 addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. CLIP (Continued Liquid Phase Interface Curing Technology) is an improved SLA (Photosensitive Curing 3D Printing Technology). It generally uses polytetrafluoroethylene as a light-transmitting base plate 102, and projects from the bottom to cure the photosensitive resin. The part that does not need to be cured is controlled by controlling oxygen as an inhibitor of the photosensitive resin to form a dead zone, which inhibits the photocuring reaction and maintains a stable liquid area. This ensures the continuity of curing and realizes efficient continuous liquid phase interface production.

[0024] Generally speaking, the formation of the dead zone requires the use of the gas supply mechanism 104 to pressurize oxygen to make it penetrate from the bottom end to the top end of the transparent bottom plate 102. Since the oxygen permeability rate of the transparent bottom plate 102 is low and the transparent bottom plate 102 is made of a flexible material, it is easy for the transparent bottom plate 102 to bulge upwards during this process. Once the height of the bulge of the transparent bottom plate 102 is too high, it will affect the curing and printing effects.

[0025] Example 1 In order to solve the above problems, this embodiment discloses a 3D printing structure, whose structure is as follows: Figure 1 and Figure 2As shown, the printing structure includes a limiting mechanism 105, a molding groove 101, a light-transmitting bottom plate 102 disposed at the bottom end of the molding groove 101, a projection mechanism 103 located below the light-transmitting bottom plate 102, and an air supply mechanism 104; When the gas supply mechanism 104 outputs positive pressure gas to drive the light-transmitting bottom plate 102 to bulge, the limiting mechanism 105 reduces the bulging height of the light-transmitting bottom plate 102 by pulling or blocking.

[0026] Preferably, the air supply mechanism 104 is an oxygen supply mechanism, and the light-transmitting bottom plate 102 is an oxygen-permeable membrane.

[0027] Specifically, the steps of the 3D printing method are as follows: Assemble and install the limiting mechanism 105 and the light-transmitting bottom plate 102; The UV lamp irradiates the bottom of the light-transmitting bottom plate 102, and the gas supply mechanism 104 simultaneously pressurizes the gas so that it passes through from the bottom end to the top end of the light-transmitting bottom plate 102; The limiting mechanism 105 pulls or blocks the light-transmitting bottom plate 102 through stress and rigidity to reduce the raised height of the light-transmitting bottom plate 102 .

[0028] In this embodiment, the limiting mechanism 105 is at least a plurality of filamentary structures, and the plurality of filamentary structures are all attached to or located on the upper end surface of the light-transmitting bottom plate 102. The filamentary structures are preferably one or more of stainless steel wire, copper wire, carbon fiber wire, and Kevlar wire. In one case, by straightening the two ends of the stainless steel wire, the internal stress of the stainless steel wire is redistributed during the straightening process, forming a stable internal stress state, so that the steel wire is not easy to bend under the action of external force; in addition, the straightened stainless steel wire itself has a certain rigidity, and when the light-transmitting bottom plate 102 is bulged under the action of external force, the stainless steel wire can block the light-transmitting bottom plate 102 to reduce the bulging height of the light-transmitting bottom plate 102.

[0029] It should be noted that the diameter of the stainless steel wire in this embodiment is 0.1 mm-0.5 mm. The stainless steel wire of this diameter can reduce the shielding of ultraviolet light as much as possible to avoid affecting the molding effect of the printed part.

[0030] Preferably, the plurality of filamentous structures are parallel or mesh structures.

[0031] Example 2 like Figure 3 As shown, the limiting mechanism 105 includes a plurality of filamentary structures, and the plurality of filamentary structures are all adhered to the lower end surface of the transparent bottom plate 102. When the transparent bottom plate 102 is bulged under the action of external force, the stainless steel wire can pull the transparent bottom plate 102 to reduce the bulging height of the transparent bottom plate 102.

[0032] Example 3 like Figure 4 As shown, the limiting mechanism 105 includes a plurality of filamentary structures, which are embedded in the transparent bottom plate 102 to form an integral structure. When the transparent bottom plate 102 bulges under the action of external force, the stainless steel wire can pull the transparent bottom plate 102 to reduce the bulge height of the transparent bottom plate 102.

[0033] Example 4 like Figure 5 As shown, the limiting mechanism 105 includes a plurality of filamentary structures, and the number of light-transmitting bottom plates 102 is two, and the two light-transmitting bottom plates 102 clamp the plurality of filamentary structures to form an integrally formed structure. Preferably, the filamentary structures can be adhered to the lower end surface of the upper light-transmitting bottom plate 102. When the light-transmitting bottom plate 102 bulges under the action of external force, the stainless steel wire can block and pull the upper and lower light-transmitting bottom plates 102 respectively to reduce the bulging height of the light-transmitting bottom plate 102.

[0034] In summary, a 3D printing structure and printing method of the present invention are provided with a limiting mechanism 105. When the gas supply mechanism 104 pressurizes the oxygen to make it pass through from the bottom end to the top end of the transparent bottom plate 102, the limiting mechanism 105 pulls or blocks the transparent bottom plate 102 through stress and rigidity, thereby reducing the bulge height of the transparent bottom plate 102 and ensuring the curing and printing effects.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A 3D printing structure, comprising a molding groove, a light-transmitting bottom plate arranged at the bottom end of the molding groove, a projection mechanism located below the light-transmitting bottom plate, and an air supply mechanism, characterized in that: The printing structure also includes a limiting mechanism; When the gas supply mechanism outputs positive pressure gas to drive the light-transmitting bottom plate to bulge, the limiting mechanism reduces the bulging height of the light-transmitting bottom plate by pulling or blocking.

2. A 3D printing structure according to claim 1, characterized in that: The limiting mechanism comprises a plurality of filamentary structures, and the plurality of filamentary structures are all attached to or located on the upper end surface of the light-transmitting bottom plate.

3. A 3D printing structure according to claim 1, characterized in that: The limiting mechanism comprises a plurality of filamentary structures, and the plurality of filamentary structures are all adhered to the lower end surface of the light-transmitting bottom plate.

4. A 3D printing structure according to claim 1, characterized in that: The limiting mechanism comprises a plurality of filamentary structures, and the plurality of filamentary structures are all embedded in the interior of the light-transmitting bottom plate to form an integrally formed structure.

5. A 3D printing structure according to any one of claims 2 to 4, characterized in that: The plurality of filamentous structures are parallel or mesh structures.

6. A 3D printing structure according to any one of claims 2 to 4, characterized in that: The filamentous structure is one or more of stainless steel wire, copper wire, carbon fiber wire and Kevlar wire.

7. A 3D printing structure according to claim 1, characterized in that: The air supply mechanism is an oxygen supply mechanism, and the light-transmitting bottom plate is an oxygen-permeable membrane.

8. A CLIP printing method, characterized in that: The following steps are involved: Assemble and install the limit mechanism and the light-transmitting bottom plate; The UV lamp irradiates the bottom of the light-transmitting bottom plate, and the gas supply mechanism simultaneously pressurizes the gas so that it penetrates from the bottom end to the top end of the light-transmitting bottom plate; The limiting mechanism pulls or blocks the light-transmitting bottom plate through stress and rigidity to reduce the bulging height of the light-transmitting bottom plate.

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