Trough with film stretching device and DLP (Digital Light Processing) resin printer

Abstract

The utility model relates to a trough with a film stretching device and a DLP (Digital Light Processing) resin printer, which comprise a trough frame and a release film, and are characterized in that the release film is stretched on one end surface of the trough frame, the release film is pressed on the trough frame through a film fixing frame, the periphery of one end of the trough frame close to the release film is fixedly provided with a stretching strip, and the stretching strip is fixed on the other end surface of the trough frame close to the release film. A tensioning strip pressing plate is fixed to the lower end face of the tensioning strip, and the tensioning strip pressing plate is pressed on the release film. According to the DLP resin printer, the trough of the printer is provided with the film tightening device, so that the release film can be conveniently mounted, tightened and replaced, the consistency of film replacement can be ensured, the printing precision and the printing quality are improved, and the use convenience of the resin printer is improved.

Description

Technical Field

[0001] The utility model relates to a DLP resin printer, belonging to the technical field of additive manufacturing. Background Art

[0002] DLP resin 3D printers usually use ultraviolet light to project and illuminate the material tank from below, so that the resin liquid at the bottom of the material tank is cured on the molding platform, and the molding platform moves upward layer by layer, and is exposed and cured layer by layer, so as to print and process a three-dimensional workpiece on the molding platform. The bottom of the material tank is usually transparent protective glass, and the top of the glass is a release film, and the release film is filled with photosensitive resin. The function of the release film is to make it easy to separate the current printed layer from the bottom of the material tank when the molding platform moves upward after printing. When the molding platform moves upward, the resin in the material tank fills the space between the current layer that has been moved upward and the bottom plate of the material tank, and then continues to print the next layer, which requires the release film to be very flat. And it must be stretched tight. After using it for a period of time, if it is loose or damaged, it needs to be replaced immediately. If the film is not tight, it will seriously affect the dimensional accuracy and quality of the printed parts. The usual practice now is to have a film stretching frame, and install the stretched film on the film stretching frame manually or using a film stretching device, and then install the film stretching frame with the stretched release film installed on the material trough. The process is cumbersome. If it is installed manually, it requires high manual proficiency and skills. If a film stretching device is used, it needs to be distributed to each customer, which is inconvenient in large quantities. If the material trough itself can realize the tension and compression of the release film, it will be very convenient, which can reduce the scrap rate of the film, improve the printing accuracy and print quality of the equipment, and improve the convenience of using the resin printer. Utility Model Content

[0003] In view of the following technical problems in the prior art: if the film is not tight, it will seriously affect the dimensional accuracy and quality of the printed parts. The usual practice now is to have a film stretching frame, and install the stretched film on the film stretching frame manually or using a film stretching device, and then install the film stretching frame with the stretched release film installed on the material trough. The process is cumbersome. If it is installed manually, it requires high manual proficiency and skills. If a film stretching device is used, it needs to be distributed to each customer, which is inconvenient in large quantities.

[0004] In order to solve the above technical problems, the utility model provides the following technical solutions: a material trough with a film stretching device, comprising a material trough frame and a release film, the release film is stretched on one end face of the material trough frame, the release film is pressed onto the material trough frame through a film fixing frame, tension strips are fixed around one end of the material trough frame close to the release film, a tension strip pressure plate is fixed on the lower end face of the tension strip, and the tension strip pressure plate is pressed onto the release film.

[0005] As a preferred technical solution for a material trough with a film stretching device, the tensioning strip includes a long-side tensioning strip and a short-side tensioning strip, and the long-side tensioning strip and the short-side tensioning strip are correspondingly arranged around the material trough frame, and the sides of the long-side tensioning strip and the short-side tensioning strip are provided with a plurality of first threaded through holes, and the tensioning strip tensioning screws are installed in the first threaded through holes.

[0006] As a preferred technical solution for a material trough with a film stretching device, the tensioning strip pressure plate includes a long-side tensioning strip pressure plate and a short-side tensioning strip pressure plate, and the long-side tensioning strip pressure plate and the short-side tensioning strip pressure plate are correspondingly arranged on one end surface of the material trough frame, and the long-side tensioning strip pressure plate and the short-side tensioning strip pressure plate are correspondingly connected to the long-side tensioning strip and the short-side tensioning strip through pressure plate fastening screws.

[0007] As a preferred technical solution for a material trough with a film stretching device, the film fixing frame is connected to the material trough frame by film fixing frame fastening screws.

[0008] As a preferred technical solution for a material trough with a film stretching device, a sealing groove is provided on one end surface of the material trough frame on the same side as the release film, and a sealing member is disposed in the sealing groove.

[0009] As a preferred technical solution for a material trough with a film stretching device, a protective glass is arranged on the film fixing frame, and the protective glass is closely attached to the stretched release film.

[0010] A method for using a material trough with a film stretching device, the method comprising the following steps:

[0011] S1: Clean the trough frame, put it on the platform with the bottom facing up, and fasten the long and short tension bars around it to the trough frame with tension bar fastening screws;

[0012] S2: Lay the release film flat on the trough frame with the bottom facing up, press the release film with the long-side tensioning strip pressure plate and the short-side tensioning strip pressure plate, and use the pressure plate fastening screws to pass through the release film and connect the long-side tensioning strip and the short-side tensioning strip together to press the release film tightly and make it inseparable;

[0013] S3: Loosen the tightening screws of the tension strips around by a certain appropriate distance, but do not screw them down, screw the tightening screws in by a certain appropriate distance, push the long-side tension strips and the short-side tension strips outward, so that the side elevations of the long-side tension strips and the short-side tension strips are separated by a certain appropriate distance from the side of the trough frame, and at the same time, stretch the release film pressed by the tension strips and the tension strip pressure plate outward to tighten the film;

[0014] S4: Install the membrane fixing frame, and tighten it with the membrane fixing frame tightening screws to press the membrane tightly;

[0015] S5: Use a blade to cut and separate the film along the outer edge of the film fixing frame;

[0016] S6: Unscrew the tensioning screw a certain distance, screw in the tensioning strip fastening screw, and make the long-side tensioning strip and the short-side tensioning strip fit with the side of the trough frame. This completes the installation and tightening of the release film.

[0017] A DLP resin printer comprises a body, wherein a molding platform is arranged on the body, and a material trough with a film stretching device is arranged on the molding platform.

[0018] The utility model discloses a material trough with a film stretching device, a method of use, and a DLP resin printer having beneficial effects: the utility model discloses a DLP resin printer, wherein the material trough of the printer has a film stretching device, which can facilitate the installation, tightening, and replacement of the release film, ensure the consistency of the replaced film, improve the printing accuracy and printing quality, and improve the convenience of using the resin printer. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0020] Figure 1 It is a three-dimensional axial schematic diagram of an embodiment of a DLP resin printer of the utility model;

[0021] Figure 2 It is a three-dimensional axial schematic diagram of the upper part of the DLP resin printer tank embodiment of the utility model;

[0022] Figure 3 It is a three-dimensional axial schematic diagram of the bottom of a DLP resin printer tank embodiment of the utility model;

[0023] Figure 4 It is a top projection schematic diagram of a DLP resin printer tank embodiment of the utility model;

[0024] Figure 5 It is a schematic AA cross-sectional view of the DLP resin printer material tank embodiment of the utility model, in which the release film covers the bottom surface of the material tank frame and the upper pressing plate and the tensioning strip are fastened by the upper pressing plate fastening screws;

[0025] Figure 6 This is a schematic AA cross-sectional view of the DLP resin printer material tank embodiment of the utility model, in which the release film covers the bottom surface of the material tank frame, the upper pressing plate and the tensioning strip are fastened by the upper pressing plate fastening screws, the tensioning strip tensioning screws are screwed in, and the release film is stretched and tightened in all directions;

[0026] Figure 7 It is a schematic AA cross-sectional view of a DLP resin printer material tank embodiment of the present invention being loaded into a film fixing frame and being fastened with film fixing frame fastening screws;

[0027] Figure 8 It is a cross-sectional view of the final working state AA after the DLP resin printer material tank embodiment of the utility model is loaded with a film fixing frame and fastened with the film fixing frame fastening screws, and the tensioning strip is restored;

[0028] Fig. 9 It is a schematic AA cross-sectional view of the final working state after the DLP resin printer material tank with protective glass embodiment of the utility model is loaded into the film fixing frame and fastened with the film fixing frame fastening screws, and the tensioning strip is restored;

[0029] Fig.10 This is an embodiment of the DLP resin printer tank of the utility model Figure 7 A partial enlarged view of point B in the middle;

[0030] Fig.11 This is an embodiment of the DLP resin printer tank of the utility model Figure 8 A partial enlarged view of point C in the middle;

[0031] Fig.12 This is an embodiment of the DLP resin printer tank of the utility model Fig. 9 A partial enlarged view of point D in the middle.

[0032] Figure numerals: 1. body; 2. workbench; 3. material trough with film stretching device; 301. material trough frame; 302. long side tensioning strip; 303. long side tensioning strip pressure plate; 304. tensioning strip fastening screw; 305. tensioning screw; 306. short side tensioning strip; 307. short side tensioning strip pressure plate; 308. pressure plate fastening screw; 309. film fixing frame; 310. film fixing frame fastening screw; 311. seal; 312. release film; 313. protective glass; 4. molding platform; 5. cantilever; 6. display control operation screen. DETAILED DESCRIPTION

[0033] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0034] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0035] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0036] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0037] like Figures 2 to 12 As shown, a material trough with a film stretching device includes a material trough frame 301 and a release film 312. The release film 312 is stretched and tightened on one end face of the material trough frame 301, and the release film 312 is pressed onto the material trough frame 301 through a film fixing frame 309. Tension strips are fixed around one end of the material trough frame 301 close to the release film 312, and a tension strip pressure plate is fixed to the lower end face of the tension strip, and the tension strip pressure plate is pressed onto the release film 312. The release film 312 can be stretched and pressed by the tension strip and the tension strip pressure plate, thereby reducing the scrap rate of the film stretching, thereby improving the printing accuracy and printing quality of the equipment, and improving the convenience of using the resin printer.

[0038] Specifically, the tensioning strip includes a long-side tensioning strip 302 and a short-side tensioning strip 306, and the long-side tensioning strip 302 and the short-side tensioning strip 306 are correspondingly arranged around the material slot frame 301, and the sides of the long-side tensioning strip 302 and the short-side tensioning strip 306 are provided with a plurality of first threaded through holes, and the tensioning strip tensioning screws 305 are installed in the first threaded through holes. The tensioning strip pressure plate includes a long-side tensioning strip 302 pressure plate and a short-side tensioning strip 306 pressure plate, and the long-side tensioning strip 302 pressure plate and the short-side tensioning strip 306 pressure plate are correspondingly arranged on one end surface of the material slot frame 301, and the long-side tensioning strip 302 pressure plate and the short-side tensioning strip 306 pressure plate are correspondingly connected to the long-side tensioning strip 302 and the short-side tensioning strip 306 through pressure plate fastening screws 308. The film fixing frame 309 is connected to the material trough frame 301 through the film fixing frame 309 fastening screws.

[0039] The material tank frame 301 is provided with a sealing groove on one end face on the same side as the release film 312. The sealing groove is provided with a sealing member 311 to prevent resin leakage. The film fixing frame 309 is provided with a protective glass 313, which is closely attached to the taut release film 312.

[0040] A method for using a material tank 3 with a film stretching device, the method comprising the following steps:

[0041] S1: Clean the trough frame 301, put it on the platform with the bottom facing up, and fasten the long side tensioning strips 302 and the short side tensioning strips 306 around it to the trough frame 301 with the tensioning strip fastening screws 304;

[0042] S2: Lay the release film 312 flat on the trough frame 301 with the bottom facing upward, press the release film 312 with the long-side tensioning strip 302 and the short-side tensioning strip 306, and use the pressure plate fastening screws 308 to pass through the release film 312 and connect the long-side tensioning strip 302 and the short-side tensioning strip 306 together to press the release film 312 tightly and make it inseparable;

[0043] S3: Loosen the tightening screws 304 of the tension strips around a certain appropriate distance, but do not screw them down, screw in the tightening screws 305 a certain appropriate distance, push the long-side tension strips 302 and the short-side tension strips 306 outward, so that the side elevations of the long-side tension strips 302 and the short-side tension strips 306 are separated from the side surfaces of the trough frame 301 by a certain appropriate distance, and at the same time, the release film 312 pressed by the tension strips and the tension strip pressure plate is stretched outward to tighten the film;

[0044] S4: Install the membrane fixing frame 309 and tighten it with the membrane fixing frame tightening screws 310 to press the membrane tightly;

[0045] S5: Use a blade to cut and separate the film along the outer edge of the film fixing frame 309;

[0046] S6: Unscrew the tensioning screw 305 a certain distance, screw in the tensioning strip fastening screw 304 and tighten it, so that the long-side tensioning strip 302 and the short-side tensioning strip 306 fit with the side of the trough frame 301, thus completing the installation and tightening of the release film 312.

[0047] like Figure 1 As shown, a DLP resin printer includes a body 1, a workbench 2, a material trough, a molding platform 4, a cantilever 5, a display control operation screen 6 and a projection light machine installed inside the body 1 and under the work platform, wherein the material trough is a material trough 3 with a film stretching device.

[0048] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A material trough with a film stretching device, comprising a material trough frame (301) and a release film (312), characterized in that: The release film (312) is stretched and tightened on one end face of the material trough frame (301), and the release film (312) is pressed onto the material trough frame (301) via a film fixing frame (309). Tension strips are fixed around one end of the material trough frame (301) close to the release film (312), and a tension strip pressure plate is fixed on the lower end face of the tension strip, and the tension strip pressure plate is pressed onto the release film (312).

2. The material trough with film stretching device according to claim 1, characterized in that: The tensioning strip comprises a long-side tensioning strip (302) and a short-side tensioning strip (306), and the long-side tensioning strip (302) and the short-side tensioning strip (306) are correspondingly arranged around the material trough frame (301), and the sides of the long-side tensioning strip (302) and the short-side tensioning strip (306) are each provided with a plurality of first threaded through holes, and the tensioning strip tensioning screws (305) are installed in the first threaded through holes.

3. The material trough with film stretching device according to claim 2, characterized in that: The tensioning strip pressure plate comprises a long-side tensioning strip pressure plate (303) and a short-side tensioning strip pressure plate (307); the long-side tensioning strip pressure plate (303) and the short-side tensioning strip pressure plate (307) are correspondingly arranged on one end surface of the material trough frame (301); the long-side tensioning strip pressure plate (303) and the short-side tensioning strip pressure plate (307) are correspondingly connected to the long-side tensioning strip (302) and the short-side tensioning strip (306) via pressure plate fastening screws (308).

4. The material trough with film stretching device according to claim 1, characterized in that: The film fixing frame (309) is connected to the material trough frame (301) via film fixing frame fastening screws (310).

5. The material trough with film stretching device according to claim 1, characterized in that: A sealing groove is provided on one end surface of the material trough frame (301) on the same side as the release film (312), and a sealing member (311) is disposed in the sealing groove.

6. The material trough with film stretching device according to claim 1, characterized in that: The film fixing frame (309) is provided with a protective glass (313), and the protective glass (313) is closely attached to the stretched release film (312).

7. A DLP resin printer, characterized in that: It comprises a machine body (1), on which a forming platform (4) is arranged, and on which a material trough (3) with a film stretching device as claimed in claim 1 is arranged.

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