Automatic liquid supplementing device applied to DLP (Digital Light Processing) equipment

Abstract

The utility model relates to an automatic liquid supplementing device applied to DLP (Digital Light Processing) equipment, which comprises a resin trough, a liquid level sensor arranged on the inner wall of the resin trough and used for detecting the resin level, a peristaltic pump connected with a resin barrel through a liquid pumping pipe, connected with the resin trough through a liquid feeding pipe, and used for feeding resin into the resin trough through the liquid feeding pipe, a liquid guide opening is reserved above the upper limit of the liquid level of the resin trough and can guide excessive resin into the resin filtering device through the first liquid return pipe, and the filtered resin is guided back to the resin barrel through the second liquid return pipe. A liquid level sensor is installed in the resin trough and used for detecting the resin level, the peristaltic pump is connected with the resin barrel through a liquid pumping pipe, resin is fed into the resin trough through a liquid feeding pipe, and meanwhile a liquid guiding opening is reserved above the upper limit of the liquid level of the resin trough and used for guiding excessive resin into the resin filtering device through a first liquid return pipe. And the filtered resin is guided back to the resin barrel through the liquid return pipe II.

Description

Technical Field

[0001] The invention belongs to the field of DLP equipment, and in particular relates to an automatic liquid replenishing device applied to DLP equipment. Background Art

[0002] DLP 3D printing technology has a fast molding speed. The previous 3D printing polymerization method is point-shaped, so the molding speed is relatively slow. DLP 3D printing can quickly project and solidify the entire surface at one time. This molding method has greatly improved the speed of 3D printing; the molding accuracy is high. With the development of technology, DLP 3D printing technology has not only fast printing speed, but also higher molding accuracy.

[0003] In general, the advantages of DLP 3D printing technology are fast printing speed and high molding accuracy, which can save a lot of costs and production time in real life.

[0004] However, the existing DLP equipment still has some shortcomings. For example, most of the existing small-scale equipment requires manual replenishment of resin into the resin tank, and usually relies on the worker's naked eye to observe the resin content in the resin tank, which is very inconvenient. If excessive amount is added, overflow is likely to occur. Therefore, an automatic liquid replenishing device for DLP equipment is proposed. Summary of the invention

[0005] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0006] In view of the following technical problems in the prior art: most of the existing DLP devices require manual addition of resin to the resin tank, and usually require visual observation of the resin content in the resin tank, which is very inconvenient, and if excessive addition is added, overflow is likely to occur.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: an automatic liquid replenishing device applied to a DLP device, comprising a resin material tank, a liquid level sensor is installed on the inner wall of the resin material tank to detect the resin material level, a peristaltic pump is connected to the resin material barrel through a liquid suction tube, the peristaltic pump is connected to the resin material tank through a liquid delivery tube, the peristaltic pump delivers the resin into the resin material tank through the liquid delivery tube, a liquid guide port is reserved at the top of the resin material tank, the liquid guide port can guide excess resin into a resin filtering device through a return liquid pipe 1, the filtered resin is guided back to the resin material barrel through a return liquid pipe 2, the liquid guide port is connected and connected to the return liquid pipe 1, the bottom end of the return liquid pipe 1 is connected to the top of the resin filtering device, and the bottom end of the resin filtering device is connected to the resin material barrel through the return liquid pipe 2.

[0008] When the liquid level sensor of the resin tank detects that the resin liquid level is low, the peristaltic pump is started to work, and the new resin in the resin barrel is sent into the resin tank through the liquid delivery pipe. When the liquid level sensor detects that the liquid level reaches the upper limit, the peristaltic pump stops working and the automatic liquid replenishment action is completed.

[0009] As a preferred technical solution for the automatic liquid replenishment device applied to DLP equipment, the position of the liquid guide port is lower than the top edge of the resin tank. When the liquid level sensor detects that the liquid level has reached the upper limit and the function fails unexpectedly, the resin exceeding the upper limit passes through the liquid guide port reserved at the top of the resin tank to introduce the excess resin into the resin filtering device through the return pipe 1, and the filtered resin is returned to the resin barrel through the return pipe 2 to prevent excess resin from overflowing the resin tank; the peristaltic pump stops working after the working time expires, and an alarm is triggered to prompt relevant personnel to perform fault inspection and repair.

[0010] As a preferred technical solution for an automatic liquid replenishment device applied to a DLP device, the resin filtering device includes a filtering device body and a resin filter screen. The resin filter screen is arranged at the top of the inner cavity of the filtering device body, and the resin filter screen is arranged in the middle of the inner cavity of the filtering device body. Liquid return pipe 1 is connected to the top of the inner cavity of the filtering device body, and liquid return pipe 2 is connected to the bottom end of the inner cavity of the filtering device body. Liquid return pipe 2 filters excess resin and guides it back to the resin barrel without affecting the subsequent use of the resin.

[0011] As a preferred technical solution for the automatic liquid replenishment device applied to DLP equipment, the resin barrel includes a barrel body, a return port, a discharge port, an upper material level detection sensor, a lower material level detection sensor and a liquid adding port; the barrel body is sequentially provided with a return port, a discharge port, an upper material level detection sensor, a lower material level detection sensor and a liquid adding port, the discharge port is plugged with a liquid extraction pipe, and the return port is plugged with a second return liquid pipe;

[0012] When the lower material level detection sensor indicates, the operator is prompted to add new resin liquid to the resin barrel, and the resin liquid is stopped when the upper material level detection sensor is supported, which is convenient for the operator to operate and monitor the equipment.

[0013] The beneficial effects of the automatic liquid replenishing device applied to DLP equipment of the present invention are as follows: a liquid level sensor is installed in the resin material tank to detect the resin material level, a peristaltic pump is connected to the resin material barrel through a liquid suction pipe, and the resin is sent into the resin material tank through a liquid delivery pipe, and a liquid guide port is reserved above the upper limit of the liquid level of the resin material tank to guide excess resin into the resin filtering device through a return liquid pipe 1, and the filtered resin is guided back to the resin material barrel through a return liquid pipe 2;

[0014] It can realize automatic replenishment of resin in the resin tank of the DLP equipment without other external tools and operations. It is easy to use, simple in structure, stable and reliable. It can also effectively avoid excessive resin addition, forgetting to add resin, and resin spilling out of the resin tank during manual addition of resin into the resin tank. At the same time, it has a safety measure that automatically guides excess resin back to the barrel when the limit sensor fails to prevent resin from overflowing from the resin tank, which has great driving value for unmanned automated production of DLP equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 It is a structural schematic diagram of the resin barrel of the present invention;

[0018] Figure 3 It is a schematic diagram of the internal structure of the resin filtering device of the present invention.

[0019] Figure numerals: 1. resin material tank; 2. resin material barrel; 2-1. barrel body; 2-2. return material port; 2-3. discharge material port; 2-4. upper material level detection sensor; 2-5. lower material level detection sensor; 2-6. liquid filling port; 3. peristaltic pump; 4. resin filtering device; 4-1. filtering device body; 4-2. resin filter net; 5. liquid extraction pipe; 6. liquid delivery pipe; 7. liquid return pipe 1; 8. liquid return pipe 2; 9. liquid level sensor. DETAILED DESCRIPTION

[0020] In order to make the above-mentioned objects, 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.

[0021] 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.

[0022] 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.

[0023] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, 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.

[0024] like Figure 1-3 As shown, the present invention proposes an automatic liquid replenishing device applied to DLP equipment, including a resin material tank 1, a liquid level sensor 9 is installed on the inner wall of the resin material tank 1 to detect the resin material level, a peristaltic pump 3 is connected to the resin material barrel 2 through a liquid suction pipe 5, the peristaltic pump 3 is connected to the resin material tank 1 through a liquid delivery pipe 6, the peristaltic pump 3 delivers the resin into the resin material tank 1 through the liquid delivery pipe 6, a liquid guide port is reserved at the top of the resin material tank 1, the liquid guide port can guide excess resin into the resin filtering device 4 through a liquid return pipe 7, the filtered resin is guided back to the resin material barrel 2 through a liquid return pipe 2 8, the liquid guide port is connected and connected to the liquid return pipe 7, the bottom end of the liquid return pipe 7 is connected to the top of the resin filtering device 4, and the bottom end of the resin filtering device 4 is connected to the resin material barrel 2 through the liquid return pipe 2 8.

[0025] When the liquid level sensor 9 of the resin tank 1 detects that the resin liquid level is low, the peristaltic pump 3 is started to work, and the new resin in the resin barrel 2 is sent into the resin tank 1 through the liquid delivery pipe 6. When the liquid level sensor 9 detects that the liquid level reaches the upper limit, the peristaltic pump 3 stops working and the automatic liquid replenishment action is completed.

[0026] The position of the liquid guide port is lower than the top edge of the resin tank 1. When the liquid level sensor 9 detects that the liquid level has reached the upper limit and the function fails unexpectedly, the resin exceeding the upper limit passes through the liquid guide port reserved at the top of the resin tank 1 to introduce the excess resin into the resin filtering device 4 through the return pipe 1 7. The filtered resin is guided back to the resin barrel 2 through the return pipe 2 8 to prevent excess resin from overflowing the resin tank 1. The peristaltic pump 3 stops working after the working time is exceeded, and an alarm is triggered to prompt relevant personnel to perform fault inspection and maintenance.

[0027] The resin filtering device 4 includes a filtering device body 4-1 and a resin filtering screen 4-2. The resin filtering screen 4-2 is arranged at the top of the inner cavity of the filtering device body 4-1, and the resin filtering screen 4-2 is arranged in the middle of the inner cavity of the filtering device body 4-1. The return liquid pipe 1 7 is connected to the top of the inner cavity of the filtering device body 4-1, and the return liquid pipe 2 8 is connected to the bottom end of the inner cavity of the filtering device body 4-1. The return liquid pipe 2 8 filters the excess resin and guides it back to the resin barrel 2, which does not affect the subsequent use of the resin.

[0028] The resin barrel 2 includes a barrel body 2-1, a return port 2-2, a discharge port 2-3, an upper material level detection sensor 2-4, a lower material level detection sensor 2-5 and a liquid adding port 2-6; the barrel body 2-1 is provided with a return port 2-2, a discharge port 2-3, an upper material level detection sensor 2-4, a lower material level detection sensor 2-5 and a liquid adding port 2-6 in sequence, the discharge port 2-3 is plugged with a liquid extraction pipe 5, and the return port 2-2 is plugged with a return liquid pipe 8;

[0029] When the lower material level detection sensor 2-5 indicates, the operator is prompted to add new resin liquid to the resin barrel 2, and the resin liquid is added until the upper material level detection sensor 2-4 is reached and then the resin liquid is stopped, so as to facilitate the operator to operate and monitor the equipment.

[0030] The liquid level sensor 9 adopts a customized analog output liquid level sensor C2010-CL;

[0031] The model of the peristaltic pump 3 may be BT100-02;

[0032] The upper material level detection sensor 2-4 and the lower material level detection sensor 2-5 both adopt WKC1204 capacitive sensors.

[0033] The upper material level detection sensor 2-4 and the lower material level detection sensor 2-5 are inserted into the barrel body 2-1 at different depths, and the bottom end of the upper material level detection sensor 2-4 is higher than the bottom end of the lower material level detection sensor 2-5.

[0034] A 51 single chip microcomputer can be used to connect to the sensor.

[0035] The specific implementation method is as follows: when the liquid level sensor 9 of the resin tank 1 detects that the resin liquid level is low, the peristaltic pump 3 is started to work, and the new resin in the resin barrel 2 is sent into the resin tank 1 through the liquid delivery pipe 6. When the liquid level sensor 9 detects that the liquid level reaches the upper limit, the peristaltic pump 3 stops working, and the automatic liquid replenishment action is completed;

[0036] When the liquid level sensor 9 detects that the liquid level reaches the upper limit and the function fails unexpectedly, the resin exceeding the upper limit passes through the liquid guide port reserved at the top of the resin tank 1 to guide the excess resin into the resin filtering device 4 through the return pipe 1 7, and the filtered resin is guided back to the resin barrel 2 through the return pipe 2 8 to prevent the excess resin from overflowing the resin tank 1;

[0037] The peristaltic pump 3 stops working after the working time is exceeded, and an alarm is sounded to prompt relevant personnel to perform fault inspection and maintenance.

[0038] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0039] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. An automatic liquid replenishing device applied to a DLP device, characterized in that: The invention comprises a resin material tank (1), the inner wall of which is provided with a liquid level sensor (9), a peristaltic pump (3) connected to a resin material barrel (2) via a liquid extraction pipe (5), the peristaltic pump (3) connected to the resin material tank (1) via a liquid delivery pipe (6), a liquid guide port reserved at the top of the resin material tank (1), the liquid guide port connected to a liquid return pipe (7), the bottom end of the liquid return pipe (7) connected to the top end of a resin filter device (4), the bottom end of the resin filter device (4) connected to the resin material barrel (2) via a liquid return pipe (8).

2. The automatic liquid replenishing device for DLP equipment according to claim 1, characterized in that: The position of the liquid guide port is lower than the top edge of the resin tank (1).

3. The automatic liquid replenishing device for DLP equipment according to claim 2, characterized in that: The resin filter device (4) comprises a filter device body (4-1) and a resin filter screen (4-2), wherein the top of the inner cavity of the filter device body (4-1) is provided with the resin filter screen (4-2), the middle of the inner cavity of the filter device body (4-1) is provided with the resin filter screen (4-2), a return pipe 1 (7) is connected to the top of the inner cavity of the filter device body (4-1), and a return pipe 2 (8) is connected to the bottom of the inner cavity of the filter device body (4-1).

4. The automatic liquid replenishing device for DLP equipment according to claim 3, characterized in that: The resin material barrel (2) comprises a material barrel body (2-1), a return material port (2-2), a discharge material port (2-3), an upper material level detection sensor (2-4), a lower material level detection sensor (2-5) and a liquid adding port (2-6); the return material port (2-2), the discharge material port (2-3), an upper material level detection sensor (2-4), a lower material level detection sensor (2-5) and a liquid adding port (2-6) are sequentially arranged on the material barrel body (2-1); the discharge material port (2-3) is plugged into a liquid extraction pipe (5), and the return material port (2-2) is plugged into a second return liquid pipe (8).

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