Protective film and three-dimensional forming equipment

Abstract

The utility model provides a protective film and three-dimensional forming equipment. The protective film is used for being arranged between a light-transmitting piece of the three-dimensional forming equipment and a material groove, a containing groove is formed in the side, facing the material groove, of the protective film, and at least part of the bottom of the material groove is located in the containing groove. Therefore, due to the arrangement of the protective film, the possibility that the light-transmitting part, other parts of the three-dimensional forming equipment or the surrounding environment is polluted by leaked liquid of the trough can be reduced or avoided, and the use cleanliness of the three-dimensional forming equipment and the use satisfaction degree of a user are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of printing equipment, in particular to a protective film and three-dimensional forming equipment. Background Art

[0002] Stereoscopic molding equipment is a kind of cumulative manufacturing technology and a machine of rapid prototyping technology. It is based on a digital model file and uses special wax materials, powdered metal or plastic and other adhesive materials to print multiple layers of adhesive materials in sequence to create three-dimensional objects.

[0003] Among them, the photocuring three-dimensional molding equipment adopts photocuring printing technology. Photocuring uses photosensitive resin as raw material, and focuses light of specific wavelength and intensity onto the surface of the photocuring material to solidify it from point to line, and from line to surface in sequence, completing the solidification of one layer, and then moving the height of a layer in the vertical direction, and then solidifying another layer, and stacking layers in sequence to form a three-dimensional entity.

[0004] In current stereolithography equipment, the photocurable material is usually contained in a material tank located above the screen. Since the photocurable material is usually liquid, when the bottom of the material tank is damaged, there is a possibility that the liquid in the material tank will leak out and contaminate the screen or other components inside the base of the stereolithography equipment, making the cleaning operation more cumbersome. Utility Model Content

[0005] In view of this, the utility model provides a protective film and a three-dimensional molding device. The setting of the protective film can reduce or avoid the possibility of liquid leakage from the material trough contaminating the light-transmitting parts, other components of the three-dimensional molding device, or the surrounding environment, thereby improving the cleanliness of the three-dimensional molding device and user satisfaction.

[0006] An embodiment of the first aspect of the utility model provides a protective film, which is applied to a three-dimensional molding device. The protective film is used to be arranged between a light-transmitting component and a material trough of the three-dimensional molding device. A receiving trough is provided on the side of the protective film facing the material trough, and at least part of the bottom of the material trough is located in the receiving trough.

[0007] Optionally, the material trough includes a material trough frame with openings at both ends, and a release film that closes the bottom opening of the material trough frame, and at least the release film opposite to the bottom opening is located in the receiving groove; the bottom area of ​​the receiving groove is greater than or equal to the area of ​​the light-transmitting component.

[0008] Optionally, the three-dimensional forming equipment also includes a base provided with a light-transmitting port, the light-transmitting component is located at the light-transmitting port, the side of the protective film facing the light-transmitting component is at least connected to the base, and the bottom area of ​​the accommodating groove is greater than or equal to the opening area of ​​the light-transmitting port.

[0009] Optionally, at least the protective film opposite to the bottom of the accommodating groove is configured as a light-transmitting member.

[0010] Optionally, the area of ​​the projection region of the protective film on the horizontal plane does not exceed the area of ​​the projection region of the material trough on the horizontal plane.

[0011] Optionally, the protective film includes: a film body and an annular boss, the annular boss is arranged or formed on a side of the film body facing the material trough, and the annular boss and the film body together form a receiving groove.

[0012] Optionally, the shape of the annular boss matches the groove structure at the bottom of the trough; or the bottom end of the trough is located inside the annular boss.

[0013] Optionally, the height of the annular boss is 0.5 mm to 4 mm.

[0014] Optionally, the annular boss is flush with the outer edge of the protective film; or, the annular boss and the outer edge of the protective film are spaced apart; the protective film is made of plastic; and / or the protective film is an integrally formed structure.

[0015] An embodiment of the second aspect of the present invention provides a three-dimensional molding device, comprising: a light-transmitting member, a material trough, and the protective film of any one of the first aspects.

[0016] The protective film and three-dimensional molding equipment provided by the embodiment of the present invention are used to be arranged between the light-transmitting part and the material trough of the three-dimensional molding equipment, and a receiving trough is provided on the side of the protective film facing the material trough, wherein at least a part of the bottom of the material trough is located in the receiving trough, so that when liquid leaks from the bottom of the material trough, such as when the release film at the bottom of the material trough is damaged or torn, a small amount of liquid in the material trough will flow into the receiving trough of the protective film through the damaged or torn release film, that is, the receiving trough of the protective film and the material trough jointly realize the accommodating and carrying of the light-curing material, thus reducing or avoiding the possibility of liquid leakage from the material trough contaminating the light-transmitting part, other components of the three-dimensional molding equipment, or the surrounding environment, thereby improving the cleanliness of the three-dimensional molding equipment, and avoiding the possibility of liquid leakage from the material trough flowing into the interior of the base where the light-transmitting part is placed through the gap on the side of the light-transmitting part, thereby playing a good protective role for the light-transmitting part and other components inside the base, and being beneficial to improving the service life of the three-dimensional molding equipment, and at the same time, simplifying the tedious cleaning operation caused by liquid leakage from the material trough contaminating the light-transmitting part, other components of the three-dimensional molding equipment, or the surrounding environment, thereby improving user satisfaction. Furthermore, the three-dimensional molding equipment continues to work, which can solidify the liquid photosensitive resin between the protective film and the release film to prevent further leakage.

[0017] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present invention. Throughout the accompanying drawings, the same reference numerals are used to denote the same components.

[0019] Figure 1 A schematic structural diagram of the protective film of the present invention from one viewing angle is shown;

[0020] Figure 2 Shown Figure 1 A cross-sectional view taken along the AA direction of the illustrated embodiment;

[0021] Figure 3 Shown Figure 2 A partially enlarged schematic diagram of the portion A of the illustrated embodiment;

[0022] Figure 4 A schematic structural diagram showing another perspective of the protective film of the present invention;

[0023] Figure 5 A cross-sectional view of the three-dimensional forming device of the present invention is shown from one perspective;

[0024] Figure 6 Shown Figure 5 A partial enlarged schematic diagram of point B in the illustrated embodiment;

[0025] Figure 7 Shown Figure 6 A partially enlarged schematic diagram of a portion C of the illustrated embodiment;

[0026] Figure 8 Shows a schematic diagram of the three-dimensional structure of the first fixing ring of the utility model;

[0027] Figure 9 A schematic diagram of the three-dimensional structure of the second fixing ring of the present invention is shown.

[0028] in, Figures 1 to 7 The corresponding relationship between the reference numerals and component names is as follows:

[0029] 100 protective film, 110 receiving groove, 111 groove bottom, 120 film body, 121 outer edge, 122 supporting edge, 130 annular boss, 200 three-dimensional molding equipment, 210 material trough, 211 release film, 212 material trough frame, 213 release fixing ring, 2131 fixed upper ring, 21311 first fixed ring, 2132 fixed lower ring, 21321 second fixed ring, 214 groove structure, 220 light-transmitting part, 230 base, 231 light-transmitting port, 240 light source, 250 molding platform. DETAILED DESCRIPTION

[0030] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present invention and the features therein can be combined with each other without conflict.

[0031] Refer to the following Figures 1 to 9 The protective film 100 and the stereoscopic molding device 200 provided in some embodiments of the present invention are described. The protective film 100 is applied to the stereoscopic molding device 200, and the stereoscopic molding device 200 can be a light-curing printer or other types of printers.

[0032] like Figure 1 、 Figure 5 、 Figure 6 and Figure 7 As shown, an embodiment of the first aspect of the present invention provides a protective film 100, which is applied to a three-dimensional molding device 200. The protective film 100 is used to be arranged between the light-transmitting component 220 and the material trough 210 of the three-dimensional molding device 200. A receiving groove 110 is provided on the side of the protective film 100 facing the material trough 210; at least part of the bottom of the material trough 210 is located in the receiving groove 110.

[0033] Among them, Figure 5As shown, the stereolithography apparatus 200 includes a light-transmitting member 220 and a material tank 210. The stereolithography apparatus 200 may further include a light source 240 and a molding platform 250. The light-transmitting member 220 may be a selectively light-transmitting member, such as a screen (i.e., a strobe screen) that can be powered to control the pattern of light passing through it. Alternatively, the light-transmitting member 220 may be a continuously light-transmitting member, such as a light-transmitting plate, in which case the light source 240 may be a DLP light source. Alternatively, the light-transmitting member 220 may be a portion of the light source 240, in which case the light source may be an OLED light source. Alternatively, the light-transmitting member 220 may be a plate-like object separate from the light source 240. The light-transmitting member 220 is located below the material tank 210, which is used to hold the photocurable material. The material tank 210 includes a release film 211 at the bottom, with the release film 211 and the light-transmitting member 220 arranged opposite each other. It is understood that the light source 240 is located on the side of the light-transmitting member 220 away from the material tank 210, and the forming platform 250 is located above the material tank 210. The light emitted by the light source 240 is focused through the light-transmitting member 220 onto the light-curing material in the material tank 210, causing the molded object to solidify on the side of the release film 211 away from the light-transmitting member 220, and to adhere to the forming platform 250 or the molded object, and to temporarily adhere to the release film 211 or the release structure. When the forming platform 250 drives the molded object away from the release film 211, with the help of the release film 211, the molded object is separated from the release film 211 for non-destructive separation, thereby completing a release printing process. After the release is completed, the forming platform 250 descends, and a distance of the thickness of the molded object layer is retained between the molded object and the release film 211 to perform curing exposure and release of the next layer of printing, and this reciprocating process completes the printing of the entire molded object.

[0034] The protective film 100 provided in an embodiment of the present invention is used to be arranged between the light-transmitting component 220 and the material trough 210 of the three-dimensional molding equipment 200, and a receiving trough 110 is provided on the side of the protective film 100 facing the material trough 210, wherein at least part of the bottom of the material trough 210 is located in the receiving trough 110, such as the bottom of the entire material trough 210 is located in the receiving trough 110, or the part of the bottom of the material trough 210 that is easily damaged and leaked is located in the receiving trough 110. In this way, when liquid leaks from the bottom of the material tank 210, such as when the release film 211 at the bottom of the material tank 210 is damaged or torn, a small amount of liquid in the material tank 210 will flow into the receiving tank 110 of the protective film 100 through the damaged or torn release film 211, that is, the receiving tank 110 of the protective film 100 and the material tank 210 jointly realize the accommodation and support of the light-curing material. In this way, the possibility of liquid leakage from the material tank 210 contaminating the light-transmitting member 220, other components of the three-dimensional molding device 200, or the surrounding environment is reduced or avoided, thereby improving the three-dimensional molding device. The 3D molding apparatus 200 is easy to use and can prevent liquid leakage from the material tank 210 from flowing into the interior of the base 230 on which the light-transmitting member 220 is placed through the gaps around the light-transmitting member 220. This effectively protects the light-transmitting member 220 and other components within the base 230, thereby increasing the service life of the 3D molding apparatus 200. Similarly, this simplifies the tedious cleaning operation caused by liquid leakage from the material tank 210 contaminating the light-transmitting member 220, other components of the 3D molding apparatus 200, or the surrounding environment, thereby improving user satisfaction. Furthermore, the 3D molding apparatus 200 continues to operate because the liquid photosensitive resin between the protective film 100 and the release film 211 can be solidified, preventing further leakage.

[0035] During the curing process of the molded object, the molded object is cured on the side of the release film 211 away from the light-transmitting member 220, and the printing of the entire molded object is completed by temporarily adhering to the release film 211, detaching from the release film 211 for non-destructive detachment, and maintaining a layer-thick distance between the release film 211 for curing and exposure of the next layer of printing. This reciprocating process completes the printing of the entire molded object. Therefore, when the release film 211 is damaged or torn, the liquid photocurable material between the protective film 100 and the release film 211 will solidify and play a certain role in shielding or repairing the damaged or torn release film 211. As a result, the liquid photocurable material in the material tank 210 will be blocked from flowing to the receiving tank 110, which has a good blocking and buffering effect on the flow of the liquid photocurable material, ensuring that the amount of liquid photocurable material flowing into the receiving tank 110 is small, and there is no possibility of the photocurable material overflowing the receiving tank 110. At this time, the receiving tank 110 can be understood as the bottom of the damaged material tank 210, that is, the receiving tank 110 of the protective film 100 and the material tank 210 jointly realize the accommodating and carrying function of the photocurable material. As a result, the protective film 100 has a good anti-leakage effect, reducing or avoiding the possibility of leakage from the material tank 210 to contaminate the light-transmitting component 220, other components of the three-dimensional molding equipment 200, or the surrounding environment, thereby improving the cleanliness of the three-dimensional molding equipment 200.

[0036] It is understandable that when the material tank 210 leaks, a small amount of liquid in the material tank 210 flows into the receiving tank 110 through the damaged or torn release film 211, and the liquid in the material tank 210 can be transferred to other containers. For example, the liquid in the leaking material tank 210 can be transferred to other containers through a pump body or other structure. This operation can reduce the waste of photocurable materials. Similarly, since the photocurable material in the damaged material tank 210 has been removed, the damaged material tank 210 can be removed and replaced with a new material tank 210. It is understandable that after the damaged material tank 210 is removed, a small amount of liquid will remain in the receiving tank 110 of the protective film 100. The liquid in the receiving tank 110 can be cleaned and then a new material tank 210 can be installed. Alternatively, a new protective film 100 can be replaced and then a new material tank 210 can be installed.

[0037] Furthermore, since the protective film 100 is located between the light-transmitting component 220 and the material trough 210, the protective film 100 provides good protection for the light-transmitting component 220, and can reduce the wear on the light-transmitting component 220 caused by direct contact between the material trough 210 and the light-transmitting component 220, thereby helping to increase the service life of the light-transmitting component 220, improve the overall reliability of the three-dimensional molding equipment 200, or prevent the liquid in the material trough 210 from entering the base 230 of the three-dimensional molding equipment 200.

[0038] like Figure 5 and Figure 6As shown, in some possible embodiments provided by the present invention, the material trough 210 also includes a material trough frame 212 with openings at both ends, and the release film 211 is connected to the material trough frame 212 to close the bottom opening of the material trough frame 212, and at least the release film 211 opposite to the bottom opening is located in the receiving trough 110.

[0039] In this embodiment, under normal circumstances, the trough frame 212 is relatively strong and is unlikely to be damaged or leaked. It is usually when the release film 211 opposite the bottom opening is damaged or torn that leakage from the trough 210 occurs. Therefore, by positioning at least the release film 211 opposite the bottom opening within the receiving groove 110 of the protective film 100, that is, the area of ​​the bottom opening of the trough frame 212 does not exceed the area of ​​the opening of the receiving groove 110, when the release film 211 opposite the bottom opening is damaged or torn at any position, it is ensured that the liquid in the trough 210 will flow through the damaged or torn release film 211 into the receiving groove 110 of the protective film 100. This improves the comprehensiveness and thoroughness of the leak-proof protection of the protective film 100 and facilitates further improvement in the cleanliness and safety of the three-dimensional molding apparatus 200.

[0040] Among them, at least the release film 211 opposite to the bottom opening is located in the receiving groove 110. The release film 211 opposite to the bottom opening may be located in the receiving groove 110, or the entire release film 211 may be located in the receiving groove 110, or the release film 211 opposite to the bottom opening and the part of the release film 211 located on the peripheral side of the bottom opening may be located in the receiving groove 110.

[0041] like Figure 5 and Figure 6 As shown, in some feasible embodiments provided by the present invention, the area of ​​the bottom 111 of the receiving tank 110 is greater than or equal to the area of ​​the light-transmitting member 220. Thus, the protective film 100 can effectively protect the light-transmitting member 220, thereby reducing the possibility of the light-transmitting member 220 being contaminated by liquid leakage from the material tank 210. Similarly, the area of ​​the bottom 111 of the receiving tank 110 is greater than or equal to the area of ​​the light-transmitting member 220, so that the horizontal projection of the tank wall of the receiving tank 110 is located outside or overlaps with the horizontal projection of the light-transmitting member 220. That is, the horizontal projection of the tank wall of the receiving tank 110 is not located inside the horizontal projection of the light-transmitting member 220. In this way, the tank wall of the receiving tank 110 can be prevented from blocking the cross-sectional pattern of the molded object focused by the curing light through the light-transmitting member 220, thereby ensuring that the tank wall of the receiving tank 110 does not block the cross-sectional pattern of the molded object focused by the curing light through the light-transmitting member 220, thereby ensuring good printing quality of the optical stereolithography device 200.

[0042] like Figure 5 、 Figure 6 、 Figure 7 As shown, in some feasible embodiments provided by the present invention, the three-dimensional forming equipment 200 also includes a base 230 provided with a light-transmitting port 231, the light-transmitting member 220 is located at the light-transmitting port 231, and the side of the protective film 100 facing the light-transmitting member 220 is at least connected to the base 230, and the area of ​​the bottom 111 of the accommodating groove 110 is greater than or equal to the opening area of ​​the light-transmitting port 231.

[0043] The side of the protective film 100 facing the light-transmitting member 220 is at least connected to the base 230. Alternatively, the protective film 100 may be connected to the base 230, or the protective film 100 may be connected to both the base 230 and the light-transmitting member 220 located at the light-transmitting opening 231. In this embodiment, the side of the protective film 100 facing the light-transmitting member 220 is at least connected to the base 230, so that the protective film 100 can block the light-transmitting opening 231, further preventing liquid leakage from the trough 210 from flowing into the interior of the base 230 through the gap at the edge of the light-transmitting opening 231. This provides good protection for other components within the base 230, helps extend the service life of other components within the base 230, and improves the overall reliability of the three-dimensional molding equipment.

[0044] Furthermore, the protective film 100 and the base 230 or the protective film 100 and the light-transmitting member 220 can be detachably connected, which facilitates the disassembly and assembly of the protective film 100 and the base 230, or the disassembly and assembly of the protective film 100, the base 230 and the light-transmitting member 220. This makes it convenient to replace the protective film 100 and to repair the light-transmitting member 220 and the base 230, which is beneficial to saving replacement costs and improving repair efficiency.

[0045] Specifically, the side of the protective film 100 facing the light-transmitting member 220 may be provided with an adhesive surface, and the protective film 100 may be connected to the base 230 via the adhesive surface, or the protective film 100 may be connected to the base 230 and the light-transmitting member 220 via the adhesive surface. It is understood that the protective film 100 may not be provided with an adhesive surface, and the protective film 100 may be bonded to the base 230 via an adhesive, or bonded to the base 230 and the light-transmitting member 220 via an adhesive.

[0046] Furthermore, the protective film 100 can be directly connected to the base 230 on the side surrounding the light-transmitting opening 231, that is, the protective film 100 connected to the base 230 can protrude from the upper surface of the base 230. Alternatively, the upper surface of the base 230 can be provided with a recessed structure on the side surrounding the light-transmitting opening 231, and the protective film 100 can be installed in the recessed structure, so that the recessed structure can be used to pre-position the protective film 100 for installation. At the same time, the provision of the recessed structure can reduce the height of the protective film 100 protruding from the upper surface of the base 230, which is conducive to improving the neatness and aesthetics of the appearance of the three-dimensional molding device 200. Optionally, the recessed structure can be used to make the height of the protective film 100 and the base 230 flush.

[0047] like Figure 5 and Figure 6 As shown, in this embodiment, the area of ​​the groove bottom 111 of the receiving groove 110 is greater than or equal to the opening area of ​​the light-transmitting port 231, so that the horizontal projection of the groove wall of the receiving groove 110 is located outside or overlaps with the horizontal projection of the light-transmitting port 231, that is, the horizontal projection of the groove wall of the receiving groove 110 will not be located inside the horizontal projection of the light-transmitting port 231, which can avoid the problem of the groove wall of the receiving groove 110 being located inside the horizontal projection of the light-transmitting port 231 and blocking the curing light passing through the light-transmitting port 231. This arrangement can avoid the groove wall of the receiving groove 110 blocking the cross-sectional pattern of the molded object focused by the curing light passing through the light-transmitting member 220 and the light-transmitting port 231, thereby ensuring good printing quality.

[0048] In the above embodiment, the groove wall of the receiving groove 110 is set as a light-shielding member, which can reduce the possibility of the curing light being projected into the external environment through the groove wall of the receiving groove 110, reduce the loss of light energy, improve the utilization rate of light energy, and reduce or avoid the impact of the curing light projected into the external environment on the user, thereby improving user satisfaction.

[0049] In some feasible embodiments of the present invention, at least the portion of the protective film 100 facing the bottom 111 of the receiving tank 110 is configured as a light-transmitting member. This configuration allows the curing light passing through the light-transmitting member 220 to smoothly and comprehensively pass through the bottom 111 of the receiving tank 110 and project onto the light-curing material, ensuring smooth printing of the formed object.

[0050] Among them, at least the protective film 100 opposite to the bottom 111 of the accommodating groove 110 is set as a light-transmitting part. The protective film 100 corresponding to the bottom 111 of the accommodating groove 110 can be a light-transmitting part, or the entire bottom surface of the protective film 100 can be a light-transmitting part, or the protective film 100 except the groove wall of the accommodating groove 110 can be a light-transmitting part.

[0051] like Figure 5 and Figure 6 As shown, in some possible embodiments of the present invention, the horizontal projection area of ​​the protective film 100 does not exceed the horizontal projection area of ​​the material trough 210. This allows the material trough 210 to effectively shield the protective film 100, that is, the protective film 100 is not visible from the exterior surface of the 3D molding device 200, thereby improving the neatness and aesthetics of the 3D molding device 200.

[0052] like Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, in some feasible embodiments provided by the present invention, the protective film 100 includes: a film body 120 and an annular boss 130, the annular boss 130 is arranged on or formed on the side of the film body 120 facing the material trough 210, and the annular boss 130 and the film body 120 are combined to form a receiving groove 110, thereby realizing the setting of the receiving groove 110, which has a simple structure and is easy to implement.

[0053] In this embodiment, the inner wall of the annular boss 130 can be understood as the groove wall of the accommodating groove 110 , and the side of the protective film 100 located inside the annular boss 130 facing the material groove 210 can be understood as the groove bottom 111 of the accommodating groove 110 .

[0054] Among them, Figure 2 、 Figure 3 、 Figure 4 As shown, in some examples, the annular boss 130 can be provided on the side of the membrane body 120 facing the material groove 210. For example, the side of the membrane body 120 facing the material groove 210 is a first plane, and the annular boss 130 protrudes from the first plane of the membrane body 120. Thus, the annular boss 130 and the first plane of the membrane body 120 located within the annular boss 130 form the receiving groove 110. It is understood that in this case, the membrane body 120 and the annular boss 130 can be an integrally formed structure or a split structure, and then the membrane body 120 and the annular boss 130 are connected together.

[0055] In other examples, the annular boss 130 can be formed on the side of the membrane body 120 facing the material trough 210, such as the membrane body 120 is deformed by depression, protrusion, etc. to form the annular boss 130. In this case, the membrane body 120 and the annular boss 130 can be an integrally molded structure.

[0056] Specifically, part of the membrane body 120 is concave in the direction from the light-transmitting member 220 to the material groove 210 to form an annular boss 130, thereby making the annular boss 130 and the membrane body 120 located inside the annular boss 130 enclose a receiving groove 110. This arrangement enables the processing of the annular boss 130 to be achieved by deformation of the membrane body 120, which is simple to operate and easy to implement.

[0057] It can be understood that when the protective film 100 is integrally injection molded, the shape and structure of the mold can be changed to enable the annular boss 130 to be set on the side of the film body 120 facing the material groove 210, or to enable the annular boss 130 to be formed on the side of the film body 120 facing the material groove 210.

[0058] like Figure 5 、 Figure 6 、 Figure 7 As shown, in some feasible embodiments provided by the present invention, the shape of the annular boss 130 matches the groove structure 214 at the bottom of the material trough 210. Thus, by matching the annular boss 130 and the groove structure 214, the assembly of the material trough 210 and the protective film 100 can be pre-positioned, so that the material trough 210 can be quickly placed in the appropriate position. At the same time, this arrangement, when the annular boss 130 is located in the groove structure 214, enables the material trough 210 to effectively shield the annular boss 130, that is, the annular boss 130 cannot be seen from the exterior surface of the three-dimensional molding device 200, thereby improving the neatness and aesthetics of the appearance of the three-dimensional molding device 200. The shape of the annular boss 130 matches the groove structure 214 at the bottom of the material trough 210, so that the annular boss 130 can be accommodated in the groove structure 214.

[0059] In some possible embodiments provided by the present invention, the bottom end of the material trough 210 is located inside the annular boss 130, that is, the material trough 210 is embedded or placed in the annular boss 130, that is, the bottom end area of ​​the material trough 210 is less than or equal to the opening area of ​​the receiving trough 110. Therefore, when the release film 211 at the bottom of the material trough 210 is damaged or torn, the liquid in the material trough 210 will flow into the receiving trough 110 of the protective film 100 through the damaged or torn release film 211, so that the protective film 100 provides more comprehensive and thorough leakage protection for the material trough 210, which is conducive to further improving the cleanliness of the three-dimensional molding equipment 200.

[0060] like Figure 3 As shown, in some achievable embodiments provided by the present invention, the height of the annular boss 130 is 0.5 mm to 4 mm. The height of the annular boss 130 can be understood as the dimension of the annular boss 130 along the direction from the light-transmitting member 220 to the trough 210. Specifically, the height of the annular boss 130 can be as follows: Figure 3 As shown in H in FIG. The direction from the light-transmitting member 220 to the trough 210 can be as follows Figure 3 and Figure 5 The direction indicated by the arrow Z in the figure can also be understood as the vertical direction.

[0061] In this embodiment, by reasonably setting the height of the annular boss 130, it can be ensured that a small amount of liquid in the material trough 210 can be reliably and safely contained in the containing groove 110 without overflowing after passing through the damaged or torn release film, ensuring that the containing groove 110 of the protective film 100 has a good and reliable anti-leakage protection function. At the same time, the overall height and volume of the protective film 100 are smaller, which is conducive to saving the manufacturing cost of the protective film 100.

[0062] Specifically, the height H of the annular boss 130 can be 0.5 mm, 0.7 mm, 0.9 mm, 1 mm, 1.4 mm, 1.6 mm, 2 mm, 2.3 mm, 2.6 mm, 2.9 mm, 3 mm, 3.2 mm, 3.4 mm, 3.5 mm, 3.7 mm, 3.9 mm, 4 mm or other sizes.

[0063] Further, if Figure 7 As shown, the height H of the annular boss 130 may also be related to the size of the groove structure at the bottom of the material trough 210. For example, the height H of the annular boss 130 is not higher than the height of the groove structure 214 at the bottom of the material trough 210, so that after the material trough 210 is installed on the protective film 100 through the contact and cooperation between the groove structure 214 and the annular boss 130, the bottom end of the material trough 210 contacts the protective film 100 or the base 230, that is, there will be no gap at the bottom end of the material trough 210 to expose the annular boss 130, thereby ensuring that the groove structure 214 of the material trough 210 can reliably and comprehensively cover the annular boss 130 to improve the aesthetic appearance of the three-dimensional molding equipment 200.

[0064] In some feasible embodiments provided by the present invention, the annular boss 130 is arranged flush with the outer edge 121 of the protective film 100. This arrangement is convenient for processing and production, and helps to reduce production costs.

[0065] like Figure 3 As shown, in some other possible embodiments of the present invention, the annular boss 130 is spaced apart from the outer edge 121 of the protective film 100. Specifically, a support edge 122 is formed between the outer edge 121 of the protective film 100 and the annular boss 130. The provision of the support edge 122 increases the connection area between the protective film 100 and the base 230 while ensuring that the area of ​​the bottom 111 of the receiving groove 110 remains unchanged, thereby improving the reliability and stability of the connection between the protective film 100 and the base 230.

[0066] In some feasible embodiments provided by the present invention, the protective film 100 is made of plastic. Plastic has good anti-leakage capability and is relatively low in cost, which helps to reduce the production cost of the protective film 100.

[0067] In some possible embodiments provided by the present invention, the protective film 100 is an integrally formed structure, which is convenient for processing, easy for production, suitable for mass production, and saves production costs. Specifically, the protective film 100 is integrally injection molded.

[0068] The second embodiment of the present invention provides a three-dimensional molding apparatus 200, comprising: a light-transmitting member 220, a material trough 210, and a protective film 100 according to any embodiment of the first embodiment. Because the three-dimensional molding apparatus 200 includes the protective film 100 according to any of the aforementioned embodiments, it possesses all the technical effects of the aforementioned protective film 100, and therefore will not be further detailed here.

[0069] The protective film 100 is disposed between the light-transmitting member 220 and the material trough 210. Furthermore, the three-dimensional molding apparatus 200 further includes a base 230. The light-transmitting member 220 is mounted at a light-transmitting opening 231 of the base 230. The material trough 210 can be placed on the base 230. The protective film 100 is connected to the base 230 and is located between the light-transmitting member 220 and the material trough 210.

[0070] Please continue to see Figure 7 The trough 210 may further include a release fixing ring 213 for clamping the release film 211 , and then fixing the release fixing ring 213 on the trough frame 212 to fix the release film 211 on the trough frame 212 .

[0071] The release fixing ring 213 includes an upper fixing ring 2131 and a lower fixing ring 2132. The upper fixing ring 2131 and the lower fixing ring 2132 are respectively located on opposite sides of the release film 211 to clamp the release film 211.

[0072] The release film 211 is rectangular or circular.

[0073] See also Figure 8 The fixed upper ring 2131 includes two first fixing rings 21311 ; the two first fixing rings 21311 can be spliced ​​together to form a rectangle or a circle. The shape of the two first fixing rings 21311 corresponds to the shape of the release film 211 .

[0074] See also Figure 9The fixed lower ring 2132 includes two second fixing rings 21321; the two second fixing rings 21321 can be spliced ​​together to form a rectangle or a circle. The spliced ​​shape of the two second fixing rings 21321 corresponds to the shape of the release film 211. The spliced ​​position of the two second fixing rings 21321 is offset from the spliced ​​position of the two first fixing rings 21311. As an alternative, if the release film 211 is rectangular, the spliced ​​shape of the two second fixing rings 21321, that is, the shape of the fixed lower ring 2132, is also rectangular. The spliced ​​position of the two second fixing rings 21321 is on one of the diagonals of the rectangle, and the spliced ​​position of the two first fixing rings 21311 is on the second diagonal of the rectangle. In this case, one first fixing ring 21311 is connected to two second fixing rings 21321; and one second fixing ring 21321 is connected to two first fixing rings 21311. The first fixing ring 21311 and the second fixing ring 21321 can be connected by screws, and during the connection, the screws can pass through the release film.

[0075] The connection between the release fixing ring 213 and the trough frame 212 can also be connected by screws.

[0076] Specifically, if Figures 1 to 9 As shown, the present invention provides the following implementation methods:

[0077] Label 1, a protective film 100, applied to a three-dimensional molding device 200, the protective film 100 is used to be arranged between the light-transmitting component 220 and the material trough 210 of the three-dimensional molding device 200, and a receiving groove 110 is provided on the side of the protective film 100 facing the material trough 210, and at least part of the bottom of the material trough 210 is located in the receiving groove 110.

[0078] Label 2, according to the protective film 100 of label 1, the material trough 210 includes a material trough frame 212 with openings at both ends, and a release film 211 that closes the bottom opening of the material trough frame 212, and at least the release film 211 opposite to the bottom opening is located in the receiving groove 110; the area of ​​the groove bottom 111 of the receiving groove 110 is greater than or equal to the area of ​​the light-transmitting member 220.

[0079] Label 3. According to the protective film 100 of label 1, the three-dimensional forming equipment 200 also includes a base 230 provided with a light-transmitting port 231, the light-transmitting member 220 is located at the light-transmitting port 231, and the side of the protective film 100 facing the light-transmitting member 220 is at least connected to the base 230, and the area of ​​the bottom 111 of the accommodating groove 110 is greater than or equal to the opening area of ​​the light-transmitting port 231.

[0080] Reference numeral 4 : According to the protective film 100 of reference numeral 1 , at least the portion of the protective film 100 facing the bottom 111 of the receiving groove 110 is configured as a light-transmitting member.

[0081] Reference numeral 5: The protective film 100 according to reference numeral 1, wherein the projection area of ​​the protective film 100 on the horizontal plane does not exceed the projection area of ​​the material trough 210 on the horizontal plane.

[0082] Label 6, according to the protective film 100 of label 1, includes: a film body 120 and an annular boss 130, the annular boss 130 is arranged or formed on the side of the film body 120 facing the material groove 210, and the annular boss 130 and the film body 120 together form a receiving groove 110.

[0083] Label 7 , according to the protective film 100 of label 6 , the shape of the annular boss 130 matches the groove structure 214 at the bottom of the material trough 210 ; or the bottom end of the material trough 210 is located inside the annular boss 130 .

[0084] Reference numeral 8. The protective film 100 according to reference numeral 6, wherein the height of the annular boss 130 is 0.5 mm to 4 mm.

[0085] Reference numeral 9, according to the protective film 100 of reference numeral 7, the annular boss 130 is flush with the outer edge 121 of the protective film 100; or, the annular boss 130 and the outer edge 121 of the protective film 100 are spaced apart;

[0086] The protective film 100 is made of plastic; and / or the protective film 100 is an integrally formed structure.

[0087] Specifically, if Figures 1 to 9 As shown, the present invention also provides the following implementation methods:

[0088] Reference numeral 10 , a three-dimensional molding device 200 , comprising: a light-transmitting member 220 , a material trough 210 , and a protective film 100 as described in any one of reference numerals 1 to 9 .

[0089] In the description of the present invention, the term "plurality" refers to two or more than two. Unless otherwise expressly defined, the terms "upper" and "lower" indicate orientations or positional relationships based on the orientations or positional relationships described in the accompanying drawings. They are intended only to facilitate the description of the present invention and simplify the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention. The terms "connect," "install," and "fix" should be understood in a broad sense. For example, "connection" can mean a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0090] It will be apparent to those skilled in the art that the present invention may be modified and varied in various ways. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A protective film, applied to a three-dimensional forming device, characterized in that: The protective film is used to be arranged between the light-transmitting component and the material trough of the three-dimensional forming equipment. A receiving groove is provided on the side of the protective film facing the material trough, and at least a part of the bottom of the material trough is located in the receiving groove.

2. The protective film according to claim 1, wherein The material trough includes a material trough frame with openings at both ends, and a release film that closes the bottom opening of the material trough frame, and at least the release film opposite to the bottom opening is located in the receiving trough as a protective film; The area of ​​the bottom of the accommodating groove is greater than or equal to the area of ​​the light-transmitting member.

3. The protective film according to claim 1, wherein The three-dimensional forming equipment also includes a base provided with a light-transmitting opening, the light-transmitting component is located at the light-transmitting opening, the side of the protective film facing the light-transmitting component is at least connected to the base, and the area of ​​the bottom of the accommodating groove is greater than or equal to the opening area of ​​the light-transmitting opening.

4. The protective film according to claim 1, wherein At least the protective film opposite to the bottom of the accommodating groove is configured as a light-transmitting member.

5. The protective film according to claim 1, wherein The area of ​​the projection area of ​​the protective film on the horizontal plane does not exceed the area of ​​the projection area of ​​the material trough on the horizontal plane.

6. The protective film according to claim 1, wherein include: The membrane body and the annular boss are arranged on or formed on a side of the membrane body facing the material trough, and the annular boss and the membrane body together form the accommodating trough.

7. The protective film according to claim 6, characterized in that The shape of the annular boss matches the groove structure at the bottom of the trough; or The bottom end of the material trough is located inside the annular boss.

8. The protective film according to claim 6, characterized in that The height of the annular boss is 0.5 mm to 4 mm.

9. The protective film according to claim 6, characterized in that The annular boss is flush with the outer edge of the protective film; or the annular boss and the outer edge of the protective film are spaced apart from each other by the protective film; The protective film is made of plastic; and / or The protective film is an integrally formed structure.

10. A three-dimensional forming device, characterized in that: include: A light-transmitting member, a material trough, and a protective film as claimed in any one of claims 1 to 9.

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