Non-destructive rapid strapping device and resin tank thereof

Abstract

The application relates to the field of area exposure additive manufacturing equipment, and provides a nondestructive quick film stretching device and a resin tank thereof. The device comprises a rectangular film stretching support frame and a film stretching light rod assembly, the film stretching light rod assembly comprises a first light rod and a second light rod for fixing a film, and the first light rod and the second light rod are arranged in parallel. The head and tail of the first light rod and the second light rod are respectively inserted into a film block, and one side of the film block is provided with a threaded adjusting hole. The film stretching support frame is provided with a through hole, and when the film stretching light rod assembly is embedded into the film stretching support frame, an XY plane locking screw is inserted into the adjusting hole through the through hole on the frame of the film stretching support frame. The film is clamped and fixed by the first light rod and the second light rod, the distance between the through hole and the adjusting hole is adjusted through the XY plane locking screw, nondestructive film stretching is realized, and the film is kept flat and stable during the printing operation while radial force is provided for the film.

Description

Technical Field

[0001] This application relates to the field of surface exposure additive manufacturing equipment, and in particular to a non-destructive rapid film stretching device and its resin tank. Background Technology

[0002] Traditional tub-stretching solutions are mostly used for fixing release films with high tensile and tear strength. Screws pass through the release film to provide radial tension and tighten it. However, for some high-performance release films, such as Teflon AF2400, although they have a certain tensile strength, their tear strength is relatively weak. Traditional tub-stretching solutions cannot provide radial tension, and therefore cannot guarantee the film flatness requirements of surface-exposure additive manufacturing equipment during operation. Summary of the Invention

[0003] In view of this, this application provides a non-destructive rapid film stretching device and its resin tank to solve the problem of simultaneously providing radial force for film stretching and ensuring film flatness.

[0004] The first aspect of this application provides a non-destructive rapid film stretching device, the device including a rectangular film stretching support frame, a film stretching rod assembly and XY plane locking screws; The film-stretching light rod assembly includes a first light rod, a second light rod, and a film-stretching block. The first light rod and the second light rod are arranged in parallel. The film-stretching block includes a connecting component at the upper end. One side of the connecting component is provided with a threaded adjustment hole, and the other side of the connecting component is provided with a light rod connecting hole. The head and tail of the first light rod and the second light rod are respectively inserted into the light rod connecting hole. The membrane support frame assembly is embedded inside the frame of the membrane support frame. A through hole is provided on the side of the frame of the membrane support frame at the position corresponding to the adjustment hole. The XY plane locking screw is inserted into the adjustment hole through the through hole.

[0005] By adopting the above technical solution, and using the clamping and fixing of the first and second optical rods, damage to the film is avoided, ensuring damage-free film stretching. The distance between the through hole and the adjustment hole is adjusted by using the XY plane locking screws, enabling rapid adjustment of the film stretching process and making the entire stretching process more efficient.

[0006] In an optional embodiment, the non-destructive rapid stretching device further includes a Z-axis locking screw; The membrane block also includes a movable limiting component connected to the side with the adjustment hole. The movable limiting component has a vertically penetrating movable limiting hole. A connecting hole is provided on the frame of the membrane support frame at a position corresponding to the movable limiting component. The movable limiting component is embedded in the connecting hole and can move within the connecting hole. The Z-axis locking screw is inserted into the frame of the membrane support frame through the movable limiting hole.

[0007] By adopting the above technical solution, a movable limiting hole is opened on the membrane stretching block, and a Z-axis locking screw is passed through the movable limiting hole to fix the membrane stretching rod assembly to the membrane stretching support frame, thereby realizing the installation and fixation between the membrane and the membrane stretching support frame. At the same time, under the action of the movable limiting hole and the Z-axis locking screw, the membrane stretching rod assembly can only move in a preset axial direction within the movable limiting hole, so as to adjust the magnitude of the radial force applied to the membrane while clamping the membrane.

[0008] In one alternative embodiment, the frame of the membrane support frame has an L-shaped structure.

[0009] By adopting the above technical solution, the membrane light rod assembly can be embedded in the frame to limit the vertical movement of the membrane light rod assembly.

[0010] In one alternative implementation, the connecting component adopts a right-angled triangular prism structure.

[0011] By adopting the above technical solution, after the membrane stretching rod assembly and the membrane stretching support frame are installed, the mutual restriction of displacement between adjacent membrane stretching blocks is avoided.

[0012] A second aspect of this application provides a resin tank, the printing station including a material tank, a base, and a film stretching body disposed between the material tank and the base; The base includes a cover plate with a groove in the middle and a connector on the edge of the upper surface of the groove. An air hole is provided on the inner wall of one side of the groove. The film-stretching body fixedly installed on the base includes the non-destructive rapid film-stretching device and the release film as described above, with the edge of the release film sleeved on the film-stretching optical rod assembly of the non-destructive rapid film-stretching device; The material groove fixedly installed on the film body has a material groove hole in the middle that corresponds to the groove.

[0013] By adopting the above technical solution, the grooved base and the release film form an oxygen storage chamber, while the other side of the release film and the material tank form a storage space for storing photosensitive resin, thereby achieving the storage isolation of oxygen and photosensitive resin.

[0014] In an optional embodiment, the resin tank further includes a throttle valve connected to an air hole on the outer side of the base.

[0015] By adopting the above technical solution, the oxygen pressure in the input gas chamber is controlled by setting up air holes and throttle valves.

[0016] In an optional embodiment, the resin tank further includes a waterproof gasket disposed between the material tank and the film body.

[0017] By adopting the above technical solution, the material tank installed above the membrane body and the waterproof gasket set between the membrane body and the material tank are used to prevent the photosensitive resin in the resin tank from leaking.

[0018] In one alternative embodiment, the bottom of the groove is constructed of high-transparency glass.

[0019] By adopting the above technical solution, the transmittance of curing light is increased by using high-transmittance glass set at the bottom of the base, thereby achieving the curing and shaping of photosensitive resin.

[0020] In one alternative implementation, the feed trough adopts a flared shape with a wider top and a narrower bottom.

[0021] By adopting the above technical solution, the risk of liquid photosensitive resin overflow is reduced because the storage tank for photosensitive resin has a wider upper part.

[0022] In an optional embodiment, the release membrane employs an oxygen-permeable membrane structure.

[0023] By adopting the above technical solution, the release film uses an oxygen-permeable membrane structure, which allows oxygen in the air chamber to diffuse into the photosensitive resin storage space, forming a dead zone that inhibits curing on the photosensitive resin that does not need to be cured, thereby keeping the photosensitive resin that does not need to be cured in a stable liquid state.

[0024] In summary, this application includes at least the following beneficial technical effects: 1. By using the parallel first and second optical rods in the film stretching optical rod assembly, non-destructive clamping of the film can be achieved; 2. By adjusting the locking screws on the XY plane, the distance between the corresponding stretching rod assembly and the stretching support frame is adjusted to adjust the radial force of the stretching film in the clamped film, thereby achieving the function of rapid stretching. 3. The groove at the bottom, together with the oxygen-permeable release membrane, forms the bottom air chamber for oxygen storage, and isolates the air chamber from the photosensitive resin to prevent the photosensitive resin from clogging the throttle valve.

[0025] 4. A dead zone is created in the photosensitive resin storage area by a release film to prevent the photosensitive resin that does not need to be cured from being affected by the curing light. At the same time, the curing light transmitted through the high-transparency glass at the bottom shapes the photosensitive resin outside the dead zone into the desired print, thereby achieving precise control over the curing and printing of the photosensitive resin. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the non-destructive rapid film stretching device provided in the embodiments of this application; Figure 2 This is an exploded view of the non-destructive rapid film stretching device provided in the embodiments of this application; Figure 3 This is a schematic diagram of the structure of the bandage block provided in the embodiments of this application; Figure 4 This is a schematic diagram of the structure of the bandage block connection provided in the embodiments of this application; Figure 5 This is a schematic diagram of the structure of the resin tank provided in the embodiment of this application; Figure 6 This is an exploded view of the resin tank provided in the embodiments of this application; Figure 7 This is a schematic diagram of the thin film winding structure provided in the embodiments of this application; Figure 8 This is a schematic diagram of the structure of the base provided in the embodiment of this application; Explanation of icon numbers 1. Non-destructive rapid film stretching equipment; 2. Resin tank; 11. Film stretching support frame; 12. Film stretching guide rod assembly; 13. XY plane locking screw; 14. Z-axis locking screw; 111. Base connecting hole; 112. Through hole; 113. Connecting hole; 121. First guide rod; 122. Second guide rod; 123. Film stretching block; 1231. Connecting component; 1232. Movement limiting component; 12311. Guide rod connecting hole; 12312. Adjustment hole; 12321. Movement limiting hole; 21. Base; 22. Film stretching body; 23. Waterproof gasket; 24. Material tank; 211. Throttling valve; 212. Cover plate; 213. Connector; 2121. Material tank connecting hole; 2122. Film stretching body connecting hole; 2123. Groove; 2124. Air hole; 221. Release film. Detailed Implementation

[0028] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0029] Embodiment 1 of this application provides a non-destructive rapid film stretching device.

[0030] See also Figure 1 and Figure 2 As shown, the non-destructive rapid film stretching device 1 includes a film stretching support frame 11, a film stretching rod assembly 12, XY plane locking screws 13 and Z-axis locking screws 14.

[0031] The membrane-stretching optical rod assembly 12 includes a first optical rod 121, a second optical rod 122, and membrane-stretching blocks 123 disposed at the head and tail of the optical rods. See also... Figure 3 As shown, the upper end of the membrane block 123 is connected by a right-angled triangular prism connecting member 1231, and the lower end of the membrane block 123, connected to one of the right-angled sides, is a movement limiting member 1232. A light rod connecting hole 12311 is provided on the other right-angled side of the connecting member 1231, and an adjustment hole 12312 is provided on the right-angled side connected to the movement limiting member 1232. The head and tail of the first light rod 121 and the second light rod 122 are respectively inserted into the light rod connecting hole 12311, so that the first light rod 121 in the membrane light rod assembly 12 is parallel to the second light rod 122. The movement limiting member 1232 is provided with a vertically penetrating movement limiting hole 12321.

[0032] The membrane support frame 11 is a rectangular support frame composed of four L-shaped borders. It should be understood that the open side of the L-shaped border is the inner side of the membrane support frame 11, and the back side of the L-shaped border is the outer side of the membrane support frame 11. A base connection hole 111 is provided on the inner side of the right angle of the border of the membrane support frame 11, and a through hole 112 is provided below the side of the border connecting the right angle. A connection hole 113 is provided below the through hole 112, so that the movable limiting component 1232 can move freely in the connection hole 113.

[0033] The first light rod 121 and the second light rod 122 in the membrane support frame 11 are embedded inside the frame of the membrane support frame 11, and the movement limiting component 1232 of the membrane block 123 is embedded in the connecting hole 113. The XY plane locking screw 13 is inserted into the adjustment hole 12312 through the through hole 112, and the Z-axis locking screw 14 is inserted into the inside of the membrane support frame 11 through the movement limiting hole 12321, thereby fixing the membrane support frame 12 inside the membrane support frame 11.

[0034] This embodiment provides a non-destructive rapid membrane stretching device, including a rectangular membrane stretching support frame and a membrane stretching rod assembly. The membrane stretching rod assembly includes a first rod and a second rod for fixing the membrane, wherein the first rod and the second rod are arranged parallel to each other. The head and tail portions of the first rod and the second rod are respectively inserted into a membrane stretching block, wherein one side of the membrane stretching block has a threaded adjustment hole, and the membrane stretching support frame is provided with a through hole. (See reference...) Figure 4 As shown, when the membrane stretching rod assembly is embedded in the membrane stretching support frame, the XY plane locking screw is inserted into the adjustment hole through the through hole on the frame of the membrane stretching support frame. This application uses the clamping and fixing of the first and second optical rods to avoid damage to the membrane and ensure damage-free membrane stretching. Adjusting the distance between the through hole and the adjustment hole using the XY plane locking screw enables rapid adjustment of the membrane, making the entire stretching process more efficient.

[0035] Embodiment 2 of this application provides a resin tank. It should be understood that the resin tank is used in Continuous Liquid Interface Production (CLIP) technology. The bottom of the CLIP printing station is made of a light-transmitting material, from which specific light is projected. This light can induce the photosensitive resin in the printing station to polymerize (i.e., cure). Oxygen can hinder the curing of the photosensitive resin. By introducing oxygen into the bottom of the printing station to create a dead zone, the curing of the photosensitive resin is controlled, allowing the portion of the photosensitive resin that does not need curing to remain in a stable liquid state. During printing, the photosensitive resin within the dead zone has its photocuring reaction inhibited by oxygen, thus maintaining a stable liquid state; the photosensitive resin outside the dead zone is cured into a specific printed part under the action of curing light.

[0036] See also Figure 5 and Figure 6 As shown, the resin tank 2 includes a base 21, a membrane body 22, a waterproof gasket 23, and a material tank 24.

[0037] The stretching body 22 includes a release film 221 and the non-destructive rapid stretching device 1 described in Embodiment 1. To maintain the brevity of the specification, the structure and function of the non-destructive rapid stretching device 1 will not be described in detail in this embodiment; please refer to Embodiment 1 for details. The edge of the release film 221 is placed in the gap between the first optical rod 121 and the second optical rod 122. By rotating the optical rods clockwise, the release film 221 is... Figure 7 The release film 221 is fitted onto the first optical rod 121 and the second optical rod 122, thereby allowing the degree of fixation of the release film 221 and the magnitude of the radial force to be adjusted by rotating the optical rods. The release film 221 is an oxygen-permeable membrane.

[0038] See Figure 8As shown, the base 21 includes a throttle valve 211, a cover plate 212 with a groove 2123 in the middle, and a connector 213 disposed on the edge of the upper surface of the groove 2123. A material trough 24 connection hole 113 is provided on the edge of the cover plate 212, and a film stretcher 22 connection hole 113 is provided on the right-angled edge of the cover plate 212. The bottom surface of the groove 2123 is made of high-transparency glass, allowing the light used for curing the resin during printing to illuminate the printed part of the release film 221 for photocuring. An air hole 2124 is provided on the inner wall of one side of the groove 2123, and the throttle valve 211, used to adjust the air intake and exhaust volume and regulate the air chamber pressure, connects to the air hole 2124 on the outer side of the base 21. The connector 213 is embedded inside the non-destructive rapid stretching device 1, so that the release film 221 and the groove 2123 form an air chamber. At the same time, the screw is inserted into the base connection hole 111 through the stretching body 22 connection hole 113, which strengthens the connection between the base 21 and the stretching body 22 and prevents oxygen in the air chamber from leaking from the side.

[0039] A funnel-shaped material tank 24 for holding liquid photosensitive resin is installed on the outside of the membrane body 22. A waterproof gasket 23 is also provided between the material tank 24 and the membrane body 22. The waterproof gasket 23 is in close contact with the material tank 24 and the release film 221 on both sides to prevent the liquid photosensitive resin from overflowing. At the same time, screws are inserted into the material tank 24 through the connection hole 113, thereby reinforcing the connection between the material tank 24 and the base 21. The screws also increase the tension between the material tank 24 and the membrane body 22, thereby pressing the waterproof gasket 23 tightly.

[0040] This embodiment provides a resin tank comprising a base with a throttling valve, a film stretcher mounted above the base, a material tank mounted above the film stretcher, and a waterproof gasket disposed between the film stretcher and the material tank. The base also has a groove, the bottom of which is made of high-transparency glass. The base and the film stretcher are connected so that the groove and the release film form an air chamber. This application uses high-transparency glass to emit curing light, causing the liquid photosensitive resin to cure into the desired print. Simultaneously, oxygen is introduced into the air chamber through the throttling valve. The oxygen creates an oxygen-rich area in the material tank through the release film, preventing the liquid photosensitive resin in the tank from being affected by light and curing. When the liquid photosensitive resin exceeds the oxygen-rich area, the light causes the liquid photosensitive resin to cure into a print.

Claims

1. A non-destructive rapid film stretching device, characterized in that, The device includes a rectangular membrane support frame, a membrane optical rod assembly, and XY plane locking screws; The film-stretching light rod assembly includes a first light rod, a second light rod, and a film-stretching block. The first light rod and the second light rod are arranged in parallel. The film-stretching block includes a connecting component at the upper end. One side of the connecting component is provided with a threaded adjustment hole, and the other side of the connecting component is provided with a light rod connecting hole. The head and tail of the first light rod and the second light rod are respectively inserted into the light rod connecting hole. The membrane support frame assembly is embedded inside the frame of the membrane support frame. A through hole is provided on the side of the frame of the membrane support frame at the position corresponding to the adjustment hole. The XY plane locking screw is inserted into the adjustment hole through the through hole. The non-destructive rapid film stretching device also includes a Z-axis locking screw; The membrane block also includes a movable limiting component connected to the side with the adjustment hole, and the movable limiting component is provided with a movable limiting hole that runs vertically through it.

2. The non-destructive rapid film stretching device according to claim 1, characterized in that, A connecting hole is provided on the frame of the membrane support frame at a position corresponding to the movable limiting component. The movable limiting component is embedded in the connecting hole and can move within the connecting hole. The Z-axis locking screw is inserted into the frame of the membrane support frame through the movable limiting hole.

3. The non-destructive rapid film stretching device according to claim 1, characterized in that, The frame of the membrane support frame adopts an L-shaped structure.

4. The non-destructive rapid film stretching device according to claim 1, characterized in that, The connecting component adopts a right-angled triangular prism structure.

5. A resin tank, characterized in that, The resin tank includes a material tank, a base, and a membrane body disposed between the material tank and the base; The base includes a cover plate with a groove in the middle and a connector on the edge of the upper surface of the groove. An air hole is provided on the inner wall of one side of the groove. The membrane body fixedly installed on the base includes the non-destructive rapid membrane stretching device as described in any one of claims 1 to 4 and a release film, wherein the edge of the release film is sleeved on the membrane stretching optical rod assembly of the non-destructive rapid membrane stretching device. The material groove fixedly installed on the film body has a material groove hole in the middle that corresponds to the groove.

6. The resin tank according to claim 5, characterized in that, The resin tank also includes a throttle valve, which is connected to an air hole on the outer side of the base.

7. The resin tank according to claim 5, characterized in that, The resin tank also includes a waterproof gasket disposed between the material tank and the film body.

8. The resin tank according to claim 5, characterized in that, The bottom of the groove is made of high-transparency glass.

9. The resin tank according to claim 5, characterized in that, The feed trough adopts a flared shape structure that is wider at the top and narrower at the bottom.

10. The resin tank according to claim 5, characterized in that, The release membrane adopts an oxygen-permeable membrane structure.

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