Automatic material supplementing resin pool of photocuring 3D printer and photocuring 3D printer

Abstract

The utility model provides an automatic material supplementing resin pool of a photocuring 3D printer and the photocuring 3D printer, and belongs to the field of 3D printing. The problems that the size of the whole machine is increased and the size of a release film needs to be increased synchronously due to the fact that a traditional resin pool adopts a regular shape to increase the liquid pool area and cost is increased are solved. An automatic material supplementing resin pool of a photocuring 3D printer comprises a pool wall and a release film located at the bottom of the pool wall, and at least one expansion part is arranged on the pool wall and used for expanding the size of the pool wall and / or serving as a resin inlet. The resin container is mainly used for containing resin.

Description

Technical Field

[0001] The utility model belongs to the field of 3D printing, and in particular relates to an automatic material-replenishing resin pool of a light-curing 3D printer and a light-curing 3D printer. Background Art

[0002] Photocuring 3D printing is a manufacturing method that projects the layered pattern of a three-dimensional model layer by layer onto the surface of a photosensitive resin in a resin pool. It is a manufacturing method that uses exposure, curing and stacking to form. There are two types of photocuring 3D printer structures. One is that the pattern is projected onto the upper surface of the photosensitive resin, which is called the upper printing structure; the other structure is that the pattern passes through the bottom of the transparent resin pool and is projected onto the lower surface of the photosensitive resin, which is called the lower printing structure. In the equipment with the lower printing structure, a release film is installed at the bottom of the resin pool. The release film has a short lifespan and is a consumable that needs to be replaced regularly. The design schemes of existing products and patent documents are basically assembly designs. The release film is fixed by various structures and then assembled with the pool wall. This type of design mainly has a contradiction between capacity and cost:

[0003] In order to facilitate the manufacture of larger models, the larger the resin tank volume, the better. However, increasing the height of the resin tank will reduce the printing height, and increasing the area of ​​the resin tank will increase the size and cost of the entire machine. In addition, in order to ensure the reliability of multiple assemblies, the existing design can only use materials with high processing costs such as metals, which are not easy to design into complex shapes. Increasing the area of ​​the resin tank will increase the size of the release film, which also increases the cost. When the volume of the resin tank is insufficient, compensating it through an automatic feeding system is a common solution, but the feeding system requires a liquid surface space that is not blocked by the workbench to accommodate the feed port and liquid level detection sensor. Since the existing design is basically a regular shape, adding a feeding system also requires a significant increase in the liquid tank area, which leads to an increase in cost. In addition, due to the regular shape of the existing design, when replacing materials or maintaining equipment, it is uncomfortable to hold and inconvenient to pour the resin, which can easily cause spillage and other problems, reducing efficiency and increasing the cost of use.

[0004] The utility model changes the traditional design idea, abandons the structure of replacing the release film, optimizes the design of the liquid pool as a whole, adapts to large-scale production processes, and has the characteristics of large capacity, low cost, easy use, safety and reliability compared with the original technical solution when the product batch is high. Summary of the invention

[0005] In view of this, the utility model aims to propose a light-curing 3D printer automatic feeding resin pool and a light-curing 3D printer, so as to solve the problem that the traditional resin pool adopts a regular shape to increase the liquid pool area, which will increase the size of the whole machine and simultaneously increase the size of the release film, resulting in increased costs.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme. According to one aspect of the utility model, a light-curing 3D printer automatic feeding resin pool is provided, comprising: a pool wall and a release film located at the bottom of the pool wall, wherein at least one expansion portion is arranged on the pool wall for expanding the volume of the pool wall and / or serving as a resin introduction port.

[0007] Furthermore, the pool wall is provided with an upper opening and a lower opening, and the release film is used to seal the lower opening and is integrally formed with the pool wall.

[0008] Furthermore, any of the expansion parts is configured as a feeding nozzle.

[0009] Furthermore, any of the expansion parts is configured as a sensor working area for installing a sensor.

[0010] Furthermore, a positioning pin is provided at the bottom of the pool wall.

[0011] Furthermore, a height adjustment device is provided at the bottom of the pool wall.

[0012] Furthermore, the height adjustment device is a gasket.

[0013] Furthermore, a handle is provided on the pool wall.

[0014] Furthermore, fixing holes are provided on the pool wall.

[0015] According to another aspect of the utility model, a light-curing 3D printer is provided, comprising an automatic resin refilling tank for a light-curing 3D printer as described above, wherein the resin tank is fixed on a printer body, and an overflow tank for use with the resin tank is provided on the printer body.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. The resin tank is equipped with an expansion unit. If space permits, the area of ​​the resin tank can be expanded freely without increasing the area of ​​the release film, eliminating the obstacle of increasing the capacity of the resin tank. At the same time, it is convenient to design a special-shaped structure, which is convenient for expanding the automatic feeding system without affecting the design of the whole machine, further solving the problem of insufficient capacity;

[0018] 2. This resin pool adopts an integrated design and can be processed using low-cost processes such as injection molding and stamping. This not only reduces the manufacturing cost of the resin pool itself, but also reduces the cost of the release film and the entire machine due to its flexible appearance design;

[0019] 3. The resin tank is provided with an expansion part, and a feeding nozzle and other structures for pouring can be designed through the expansion part, which can improve work efficiency and reduce losses and pollution when adding and changing materials; at the same time, the structure can flexibly design the holding and fastening structure, which can improve the human-machine effect and enhance the comfort of use;

[0020] 4. The light-curing 3D printer is safe and reliable: In order to cooperate with the resin pool, an overflow groove is added to the overall structure of the light-curing 3D printer. When the sensor fails and the resin overflows, it can flow away through the overflow groove without contaminating the core components such as the optical path, further improving the reliability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0022] Figure 1 This is a schematic diagram of the three-dimensional structure of an automatic resin refilling tank for a light-curing 3D printer according to the utility model;

[0023] Figure 2 This is a schematic diagram of the arrangement positions of the positioning pins and the height adjustment device described in the utility model.

[0024] Pool wall 1; release film 2; feeding nozzle 3; sensor working area 4; sensor 5; positioning pin 6; height adjustment device 7; buckle 8; fixing hole 9. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely explain the technical solutions in the embodiments of the utility model. It should be noted that the embodiments and features in the embodiments of the utility model can be combined with each other without conflict, and the described embodiments are only part of the embodiments of the utility model, not all of the embodiments.

[0026] It should be noted that the descriptions of the present invention regarding directions such as "left", "right", "left side", "right side", "upper", "lower", "top", "bottom", etc. are all defined based on the relationship between the orientations or positions shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the structure described must be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention. In the description of the present invention, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0027] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] Referring to the accompanying drawings, this embodiment is described. According to one aspect of the utility model, there is provided a light-curing 3D printer automatic feeding resin pool, comprising: a pool wall 1 and a release film 2 located at the bottom of the pool wall 1, wherein at least one expansion portion is provided on the pool wall 1 for expanding the volume of the pool wall 1 and / or serving as a resin introduction port. By providing the expansion portion, the volume of the pool wall 1 can be arbitrarily expanded without being restricted by the pool wall 1 and the body of the 3D printer, and the release film 2 is not affected during the change, so there is no need to replace a new release film 2 to adapt to the changed volume and area of ​​the pool wall 1. Traditional resin pools are set to conventional regular shapes due to the process and the thinking inertia of designers, so when the area of ​​the pool wall 1 is increased, it is naturally necessary to increase the area of ​​the release film 2 to adapt to the pool wall 1. The design of this resin pool can just change the defects caused by the conventional shape.

[0029] In this embodiment, the pool wall 1 is provided with an upper opening and a lower opening, and the release film 2 is used to block the lower opening and is integrally formed with the pool wall 1. By setting the expansion part, the area of ​​the pool wall 1 can be changed without changing the release film 2, so the one-piece molding by means of die casting can further reduce the production cost. The main body of the upper opening is a rounded rectangle, 260 mm long and 200 mm wide, and the depth of the resin pool is 35 mm. There is a 40×20 mm protrusion on each corner of the long side, which is the expansion part. The main body of the lower opening is a rounded rectangle, 230 mm long and 160 mm wide, with a fillet radius of 50 mm.

[0030] In this embodiment, any of the expansion parts is set as the feeding nozzle 3. Setting the expansion part as the feeding nozzle 3 can add the feeding nozzle 3 without occupying the overall area of ​​the pool wall 1, which will not increase the overall volume of the printer and the space occupancy rate, and can reduce component costs.

[0031] In this embodiment, any of the expansion parts is set as a sensor working area 4 for installing a sensor 5. By setting the sensor working area 4, it is also possible to increase the area for the sensor 5 without occupying the overall area of ​​the pool wall 1. For the sensor 5, a liquid level sensor is used in conjunction with a float. When replenishing, the liquid surface pushes the float to drive the corresponding lever to move, pressing the travel switch or other sensor installed on the machine body. After receiving the signal, the control system stops the resin delivery. The sensor 5, the float, and the lever, controller, and travel switch that match the float are all existing technologies and are not described here.

[0032] In this embodiment, a positioning pin 6 is provided at the bottom of the pool wall 1. The positioning pin 6 is provided so that when the whole machine is installed, a quick positioning installation can be performed through the positioning pin 6 and the light-curing 3D printer to improve the installation efficiency. The positioning pin 6 is specifically configured to be cylindrical, 5 mm long, 5 mm in diameter, and with a 2-degree taper. For the pool wall 1, it is manufactured using a nylon injection molding process, and the release film 2 is made of tetrafluoroethylene-hexafluoropropylene copolymer (FEP) material with a thickness of 0.15 mm, and is connected to the resin pool wall using ultrasonic welding.

[0033] In this embodiment, a height adjustment device 7 is provided at the bottom of the pool wall 1. The height adjustment device 7 can adjust the height of the pool wall 1. Adjusting the height according to the actual working conditions is conducive to improving the flexibility of the resin pool.

[0034] In this embodiment, the height adjustment device 7 is a gasket. Gaskets are easy to obtain and have low cost. A certain number of gaskets can be selected to increase or decrease the height according to actual needs, and the operation is simple and easy.

[0035] In this embodiment, a handle 8 is provided on the pool wall 1. The handle 8 can improve the convenience of operating the pool wall 1. Specifically, the handle 8 can be provided on both sides of the pool wall 1, thereby improving the stability and convenience during movement, and grasping with both hands is more conducive to smooth transfer. The handle 8 is specifically set to be trapezoidal, which is convenient for holding. The upper bottom of the handle 8 is 70 mm long, the lower bottom is 120 mm long, the height is 15 mm, and the thickness is 3 mm.

[0036] In this embodiment, the pool wall 1 is provided with a fixing hole 9. The fixing hole 9 is provided so that when the resin pool is installed with the whole machine, screws are inserted into the fixing hole 9 to connect the resin pool with the whole machine. The fixing hole 9 is specifically provided in the middle of the buckle 8 and has a diameter of 4 mm.

[0037] According to another aspect of the utility model, a light-curing 3D printer is provided, comprising the above-mentioned light-curing 3D printer automatic feeding resin pool, wherein the resin pool is fixed on the printer body, and an overflow tank used in conjunction with the resin pool is provided on the printer body. When the means for controlling the liquid level such as the liquid level sensor fails, the resin is drained and collected through the overflow tank, thereby improving the safety of the light-curing 3D printer.

[0038] In the above description, the sensors, controllers and control programs that may be involved are all existing technologies and will not be described in detail here.

[0039] The embodiments of the utility model disclosed above are only used to help explain the utility model. The embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. According to the content of this specification, many modifications and changes can be made. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model.

Claims

1. A light-curing 3D printer automatic refilling resin tank, characterized in that: include: A pool wall (1) and a release film (2) located at the bottom of the pool wall (1), wherein at least one expansion portion is arranged on the pool wall (1) for expanding the volume of the pool wall (1) and / or serving as a resin introduction port.

2. The automatic resin refilling tank of a light-curing 3D printer according to claim 1, characterized in that: The pool wall (1) is provided with an upper opening and a lower opening, and the release film (2) is used to seal the lower opening and is formed integrally with the pool wall (1).

3. The automatic resin refilling tank of a light-curing 3D printer according to claim 1, characterized in that: Any of the expansion parts is configured as a feeding nozzle (3).

4. The automatic resin refilling tank of a light-curing 3D printer according to claim 1, characterized in that: Any of the expansion parts is configured as a sensor working area (4) for installing a sensor (5).

5. The automatic resin refilling tank of a light-curing 3D printer according to claim 1, characterized in that: A positioning pin (6) is provided at the bottom of the pool wall (1).

6. The automatic resin refilling tank of a light-curing 3D printer according to claim 1, characterized in that: A height adjustment device (7) is provided at the bottom of the pool wall (1).

7. The automatic resin refilling tank of a light-curing 3D printer according to claim 6, characterized in that: The height adjustment device (7) is a gasket.

8. The automatic resin refilling tank of a light-curing 3D printer according to claim 1, characterized in that: A buckle (8) is provided on the pool wall (1).

9. The automatic resin refilling tank of a light-curing 3D printer according to claim 1, characterized in that: The pool wall (1) is provided with fixing holes (9).

10. A light-curing 3D printer, comprising a light-curing 3D printer automatic refilling resin tank according to any one of claims 1 to 9, characterized in that: The resin pool is fixed on the printer body, and the printer body is provided with an overflow tank used in conjunction with the resin pool.

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