Dispensing needle cleaning device

Abstract

The utility model provides a dispensing needle cleaning device which sequentially comprises a rolling brush cleaning mechanism, a rolling brush, a cleaning groove and a driving mechanism in the proceeding direction of a cleaning process, the rolling brush cleaning mechanism comprises a rolling brush for performing contact type cleaning on a dispensing needle, the cleaning groove is used for containing cleaning agents, and the driving mechanism is used for driving the rolling brush to rotate. And the airflow cleaning mechanism is used for carrying out airflow cleaning on the dispensing needle. According to the utility model, the roller brush cleaning mechanism is firstly adopted to carry out contact type cleaning on the dispensing needle head, high-viscosity glue on the needle head can be diluted and dissolved based on a cleaning agent during cleaning, and then the airflow cleaning mechanism is adopted to carry out non-contact type secondary cleaning on residual solvent and glue on the dispensing needle head; and the printing consistency of the dispensing needle head is ensured, and the problem of needle blocking or scrapping caused by the cleaning action is effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of dispensing technology, and in particular to a dispensing needle cleaning device. Background Technology

[0002] The printing nozzle is a crucial component in the 3D printing process. During dispensing printing, adhesive residue easily remains on the nozzle surface, leading to decreased printing accuracy and abnormal print morphology. To address the issue of high-viscosity adhesive residue on the nozzle after printing, while simultaneously meeting the requirements for high-frequency and efficient nozzle cleaning, and ensuring that nozzle cleaning does not negatively impact subsequent printing, a dispensing nozzle cleaning device is urgently needed.

[0003] Currently, most dispensing needle cleaning devices on the market use a method of relative movement between a lint-free cloth roll and the needle for wiping and cleaning. Such mechanisms generally use a gripper cylinder and lint-free cloth as a consumable for wiping. This method cannot meet the cleaning function of needles with high viscosity adhesives. Increasing the clamping force of the gripper may damage the needle or cause fibers from the lint-free cloth to get caught on the needle tip, rendering the needle unusable.

[0004] A Chinese patent document, CN109127232A, discloses a "Dispensing Needle Cleaning Device and Method." This patent's dispensing needle cleaning device includes a cleaning cylinder with an internal cleaning chamber. One end of the cleaning cylinder has a needle insertion hole communicating with the cleaning chamber, and the other end has a waste outlet. One end of the cleaning cylinder has several obliquely penetrating air jets communicating with the cleaning chamber. These air jets are connected to an external high-pressure air source. The inner orifices of each air jet are rotationally symmetrically distributed relative to the central axis of the cleaning cylinder and are configured to guide the high-pressure airflow ejected from the inner orifice of each air jet into the cleaning chamber at a predetermined angle, forming a vortex airflow within the cleaning chamber for cleaning the dispensing needle. This patent cleans the dispensing needle by introducing high-pressure airflow into the cleaning chamber and guiding it to form a vortex airflow within the cleaning chamber, representing a non-contact cleaning mode. However, directly using high-pressure airflow to blow away the high-viscosity adhesive on the needle can result in incomplete cleaning. Utility Model Content

[0005] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a dispensing needle cleaning device to solve the problems that the existing dispensing needle cleaning devices mainly use the method of relative movement between the lint-free cloth roll and the needle for wiping and cleaning, which cannot meet the needle cleaning function for high viscosity adhesives. Increasing the clamping force of the gripper may damage the needle or cause the lint-free cloth fibers to get stuck on the needle tip, resulting in the needle being unusable.

[0006] To achieve the above-mentioned and other related objectives, this utility model is implemented through the following technical solutions.

[0007] This utility model provides a dispensing needle cleaning device, which, along the cleaning process direction, comprises:

[0008] The roller brush cleaning mechanism includes a roller brush for contact cleaning of dispensing needles, a cleaning tank for holding cleaning agent, and a drive mechanism for driving the roller brush to rotate.

[0009] Airflow cleaning mechanism is used to clean the dispensing needle tip with airflow.

[0010] In the above technical solution of this application, a roller brush cleaning mechanism is first used to perform contact cleaning on the dispensing needle. During cleaning, the high viscosity glue on the dispensing needle can be diluted and dissolved based on the cleaning agent (such as organic solvent) adhering to the surface of the roller brush bristles. Then, an airflow cleaning mechanism is used to perform non-contact secondary cleaning of the dispensing needle to remove residual solvent and glue, ensuring the consistency of printing on the dispensing needle and effectively reducing the problems of needle clogging or scrap caused by the cleaning action.

[0011] Preferably, the airflow cleaning mechanism includes an airflow cleaning chamber and an air blowing assembly disposed within the airflow cleaning chamber. The air blowing assembly is used to spray cleaning gas onto the dispensing needle, and the airflow cleaning chamber is used to collect the adhesive and residual cleaning agent that falls from the dispensing needle.

[0012] Preferably, the blowing assembly includes a nozzle and a blowing gas guide plate, and the airflow cleaning chamber is also provided with a negative pressure pipe. The blowing gas guide plate is used to guide the blowing gas into the negative pressure pipe. The negative pressure pipe has an inlet and an outlet. The inlet is connected to the airflow cleaning chamber, and the outlet is externally connected to a negative pressure generator.

[0013] By setting the blowing gas guide plate at a certain angle, the blowing gas is guided, allowing the cleaned gas to flow into the negative pressure pipeline. Based on the negative pressure generated by the negative pressure generator in the negative pressure pipeline, the glue or organic solvent splashed during the high-pressure gas cleaning of the dispensing needle can be adsorbed, preventing secondary pollution caused by splashing onto the dispensing needle.

[0014] Preferably, the negative pressure pipeline is equipped with a filter, which is used to filter out spilled adhesive and residual cleaning agent, thereby protecting the negative pressure gas pipeline inside the equipment.

[0015] Preferably, the airflow injection speed and airflow injection angle of the nozzle are adjustable.

[0016] More preferably, the airflow jet angle is adjustable so that the pitch angle of the nozzle is adjustable, which can meet the cleaning of dispensing needles of various sizes and ensure good gas flow, preventing secondary pollution during the cleaning process.

[0017] Preferably, the nozzle is equipped with an airflow regulating valve to control the flow rate of the cleaning gas, thereby ensuring the stability of the cleaning gas flow range within the cleaning chamber.

[0018] Preferably, the roller brush is disposed in the cleaning tank, and the opening of the cleaning tank is provided with an anti-splash component, which is used to prevent the adhesive and cleaning agent from splashing onto other parts of the equipment during the roller brush rotation cleaning process.

[0019] Preferably, the anti-splash assembly includes a cleaning cover and an anti-splash baffle disposed above the cleaning cover, wherein a dispensing needle insertion port is formed at the center of the cleaning cover and the anti-splash baffle.

[0020] Preferably, the anti-splash baffle is provided with a vacuum passage, one end of which is connected to the dispensing needle inlet, and the other end is connected to a vacuum generator. This high-vacuum adsorption method adsorbs splashed droplets during the roller brush cleaning process, preventing organic matter from corroding other components on the printed parts.

[0021] Preferably, a spring-loaded latch assembly is provided between the cleaning cover and the opening of the cleaning tank to facilitate the quick replacement of the roller brush by opening the cleaning cover.

[0022] Preferably, the size of the dispensing needle inlet gradually decreases along the direction from the dispensing needle to the cleaning groove. This structure facilitates the insertion and removal of the dispensing needle and also provides anti-splashing function during the roller brush cleaning process.

[0023] Preferably, the driving mechanism includes a stepper motor, a synchronous pulley, and a synchronous belt, and the roller brush has a rotating shaft. The stepper motor, synchronous pulley, and synchronous belt are connected to the rotating shaft for transmission. The roller brush transmission in this application uses a synchronous pulley and synchronous belt method, and the stepper motor drives the roller brush to rotate at a specified speed, which can achieve high-precision transmission while maintaining low dust generation.

[0024] Preferably, the side wall of the cleaning tank is provided with a hexagonal handle, which enables quick disassembly and assembly of the cleaning tank and quick replacement of the roller brush.

[0025] As described above, the dispensing needle cleaning device of this utility model has the following beneficial effects:

[0026] (1) First, the roller brush cleaning mechanism is used to clean the dispensing needle head in contact. During cleaning, the cleaning agent can be used to dilute and dissolve the high viscosity glue on the needle head. Then, the airflow cleaning mechanism is used to clean the dispensing needle head in a non-contact secondary cleaning to remove residual solvent and glue, ensuring the consistency of printing of the dispensing needle head and effectively reducing the problem of needle blockage or scrap caused by the cleaning action.

[0027] (2) By setting the blowing gas guide plate at a certain angle, the blowing gas can be guided, and the cleaned gas can be guided into the negative pressure pipeline. Based on the negative pressure generated by the negative pressure generator in the negative pressure pipeline, the glue or organic solvent splashed when the high pressure gas cleans the dispensing needle can be adsorbed, preventing it from splashing onto the dispensing needle and causing secondary pollution.

[0028] (3) High vacuum adsorption is used to adsorb the splashed droplets during the roller brush cleaning process to prevent organic matter from corroding other components on the printing parts. Attached Figure Description

[0029] Figure 1 The diagram shows a three-dimensional structure of a dispensing needle cleaning device.

[0030] Figure 2 Displayed as Figure 1 Front view.

[0031] Figure 3 The diagram shows the installation structure of the roller brush and cleaning tank.

[0032] Figure 4 Displayed as Figure 3 Enlarged view of point A in the middle.

[0033] Figure 5 The diagram shown is a structural schematic of an airflow cleaning chamber.

[0034] Reference numerals: 1. Roller brush; 2. Cleaning tank; 3. Airflow cleaning chamber; 31. Nozzle; 21. Cleaning cover; 22. Anti-splash baffle; 221. Dispensing needle inlet; 222. Vacuum air passage; 2221. Vacuum air passage connector; 2222. Vacuum connector; 2222. Spring latch assembly; 223. Purging gas guide plate; 32. Negative pressure pipe; 33. Inlet; 331. Outlet; 332. Filter; 333. Airflow regulating valve; 312. Stepper motor; 4. Hexagonal handle; 5. Detailed Implementation

[0035] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0036] Please see Figures 1 to 5It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the disclosed technical content. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0037] like Figure 1 and Figure 2 As shown, this utility model provides a dispensing needle cleaning device, which, along the cleaning process direction, includes, in sequence:

[0038] The roller brush cleaning mechanism includes a roller brush 1 for contact cleaning of dispensing needles, a cleaning tank 2 for holding cleaning agent, and a drive mechanism for driving the roller brush to rotate; the roller brush is disposed in the cleaning tank; the opening of the cleaning tank is provided with an anti-splash component, which is used to prevent adhesive and cleaning agent from splashing onto other parts of the equipment during the roller brush rotation cleaning process.

[0039] Airflow cleaning mechanism is used to clean the dispensing needle tip with airflow.

[0040] Combination Figure 1 and Figure 5 The airflow cleaning mechanism includes an airflow cleaning chamber 3 and an air blowing assembly disposed within the airflow cleaning chamber. The air blowing assembly is used to spray cleaning gas onto the dispensing needle, and the airflow cleaning chamber is used to collect adhesive and residual cleaning agent dropped from the dispensing needle. The air blowing assembly includes a nozzle 31 and a cleaning gas guide plate 32. The nozzle is equipped with an airflow regulating valve 312, and the airflow injection speed and airflow injection angle of the nozzle are adjustable. The airflow cleaning chamber is also equipped with a negative pressure pipe 33. The cleaning gas guide plate is used to guide the cleaning gas into the negative pressure pipe. The negative pressure pipe has an inlet 331 and an outlet 332. The inlet is connected to the airflow cleaning chamber, and the outlet is connected to a negative pressure generator. The negative pressure pipe is equipped with a filter 333, which is used to filter the dropped adhesive and residual cleaning agent.

[0041] like Figure 5The aforementioned blowing gas guide plate 32 comprises two plates, which are arranged at an angle relative to each other, forming an angled structure with the negative pressure pipeline. By setting the blowing gas guide plate at a certain angle, the blowing gas is guided, allowing the cleaned gas to flow into the negative pressure pipeline. Based on the negative pressure generated by the negative pressure generator in the negative pressure pipeline, the splashed glue or organic solvent during high-pressure gas cleaning of the dispensing needle can be adsorbed, preventing splashing onto the dispensing needle and causing secondary pollution.

[0042] Combination Figure 1 , Figure 3 and Figure 4 The anti-splash assembly includes a cleaning cover 21 and an anti-splash baffle 22 disposed above the cleaning cover. A dispensing needle insertion port 221 is formed at the center of the cleaning cover and the anti-splash baffle. The size of the dispensing needle insertion port gradually decreases along the direction from the dispensing needle to the cleaning tank. A vacuum passage 222 is provided inside the anti-splash baffle. One end of the vacuum passage is connected to the dispensing needle insertion port, and the other end is provided with a vacuum connector 2222. A vacuum generator is externally connected to the vacuum connector. The vacuum generator is provided with a vacuum passage pipe connector 2221, which is connected to the vacuum connector 2222 via a pipe to connect the vacuum passage and create a vacuum environment.

[0043] like Figure 1 As shown, a spring-loaded latch assembly 223 is provided between the cleaning cover and the opening of the cleaning tank, facilitating the quick replacement of the roller brush by opening the cleaning cover. A hexagonal handle 5 is provided on the side wall of the cleaning tank, enabling quick disassembly and assembly of the cleaning tank and quick replacement of the roller brush. The drive mechanism includes a stepper motor 4, a synchronous pulley, and a synchronous belt. The roller brush has a rotating shaft, and the stepper motor, synchronous pulley, and synchronous belt are connected to the rotating shaft via a synchronous pulley and synchronous belt. The stepper motor drives the roller brush to rotate at a specified speed, achieving high-precision transmission with low dust generation.

[0044] The working principle of this dispensing needle cleaning device is as follows:

[0045] First, a roller brush cleaning mechanism is used to clean the dispensing needle head in contact. During cleaning, the cleaning agent adhering to the surface of the roller brush bristles is used to dilute and dissolve the high-viscosity glue on the dispensing needle head. Then, an airflow cleaning mechanism is used to perform a non-contact secondary cleaning of the dispensing needle head to remove residual solvent and glue. This ensures the consistency of the printing of the dispensing needle head and effectively reduces the problems of needle clogging or scrap caused by the cleaning action.

[0046] During the contact cleaning of the dispensing needle using the roller brush cleaning mechanism, an anti-splatter baffle is used to adsorb the splashed droplets during the roller brush cleaning process based on high vacuum adsorption, preventing organic matter from corroding other components on the printed parts.

[0047] The dispensing needle is cleaned in a non-contact manner using an airflow cleaning mechanism. A negative pressure generator is used to create negative pressure in the negative pressure pipeline to absorb any splashed glue or organic solvents during the high-pressure gas cleaning of the dispensing needle, preventing secondary contamination caused by splashing onto the dispensing needle.

[0048] In summary, this invention first employs a roller brush cleaning mechanism for contact cleaning of the dispensing needle, during which the cleaning agent dilutes and dissolves the high-viscosity adhesive on the needle. Then, an airflow cleaning mechanism performs a non-contact secondary cleaning of the dispensing needle to remove residual solvent and adhesive, ensuring consistent printing and effectively reducing needle clogging or scrapping issues caused by the cleaning process. Therefore, this invention effectively overcomes the various shortcomings of existing technologies and possesses high industrial applicability.

[0049] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A dispensing needle cleaning device, characterized in that, Along the direction of the cleaning process, the process includes, in sequence: The roller brush cleaning mechanism includes a roller brush (1) for contact cleaning of dispensing needles, a cleaning tank (2) for holding cleaning agent, and a drive mechanism for driving the roller brush to rotate. Airflow cleaning mechanism is used to clean the dispensing needle tip with airflow.

2. The dispensing needle cleaning device according to claim 1, characterized in that: The airflow cleaning mechanism includes an airflow cleaning chamber (3) and an air blowing assembly disposed in the airflow cleaning chamber. The air blowing assembly is used to spray cleaning gas onto the dispensing needle, and the airflow cleaning chamber is used to collect the adhesive and residual cleaning agent that fall from the dispensing needle.

3. The dispensing needle cleaning device according to claim 2, characterized in that: The blowing assembly includes a nozzle (31) and a blowing gas guide plate (32). The airflow cleaning chamber is also provided with a negative pressure pipe (33). The blowing gas guide plate is used to guide the blowing gas into the negative pressure pipe. The negative pressure pipe has an inlet (331) and an outlet (332). The inlet is connected to the airflow cleaning chamber, and the outlet is connected to a negative pressure generator.

4. The dispensing needle cleaning device according to claim 3, characterized in that: The negative pressure pipeline is equipped with a filter (333) for filtering out spilled adhesive and residual cleaning agent.

5. The dispensing needle cleaning device according to claim 3, characterized in that: The airflow injection speed and airflow injection angle of the nozzle are adjustable, and the nozzle is equipped with an airflow regulating valve (312).

6. The dispensing needle cleaning device according to claim 1, characterized in that: The roller brush is located inside the cleaning tank, and the opening of the cleaning tank is equipped with an anti-splash component. The anti-splash component is used to prevent the adhesive and cleaning agent from splashing onto other parts of the equipment during the roller brush rotation cleaning process.

7. The dispensing needle cleaning device according to claim 6, characterized in that: The anti-splash assembly includes a cleaning cover (21) and an anti-splash baffle (22) disposed above the cleaning cover, wherein a dotted needle insertion port (221) is formed at the center of the cleaning cover and the anti-splash baffle.

8. The dispensing needle cleaning device according to claim 7, characterized in that: The anti-splash baffle is provided with a vacuum passage (222), one end of which is connected to the dispensing needle insertion port, and the other end is provided with a vacuum connector (2222), which is connected to a vacuum generator.

9. The dispensing needle cleaning device according to claim 7, characterized in that: A spring-loaded latch assembly (223) is provided between the cleaning cover and the opening of the cleaning tank.

10. The dispensing needle cleaning device according to claim 7, characterized in that: The size of the dispensing needle inlet gradually decreases along the direction from the dispensing needle to the cleaning tank.

11. The dispensing needle cleaning device according to claim 1, characterized in that: The drive mechanism includes a stepper motor (4), a synchronous pulley and a synchronous belt. The roller brush has a rotating shaft. The stepper motor, synchronous pulley and synchronous belt are connected to the rotating shaft for transmission. The side wall of the cleaning tank is provided with a hexagonal handle.

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