Dispensing machine needle cleaning device

Abstract

The utility model relates to a kind of point gum machine needle cleaning device, belong to point gum machine needle cleaning technical field.The point gum machine needle cleaning device, comprising: cleaning cylinder, the cleaning cylinder top is provided with sealing cover, the sealing cover top central position is equipped with through-hole, the multi-position electromagnetic valve is fixedly installed with quick coupling, and is communicated with external air source, the through-hole is installed with the expansion sealing plug being communicated with multi-position electromagnetic valve, the above-mentioned point gum machine needle cleaning device, cleaning mechanism is arranged, by external air source to expansion sealing plug pressurization, make expansion sealing plug expand, the needle to be cleaned is pressed tightly, avoid expansion sealing plug and needle interval air leakage, subsequently to the cleaning cylinder is inflated, make the pressure in cleaning cylinder become big, cleaning cylinder is cleaned in the liquid and rises under the action of pressure, contact with the glue in needle, to its be dissolved cleaning, cleaning effect is good, by adjusting air pressure, to change the height of cleaning liquid, to adjust the position of cleaning, it is convenient to use.

Description

Technical Field

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

[0002] A dispensing machine, also known as an adhesive applicator, glue applicator, glue applicator, or glue dispensing machine, is a specialized machine for controlling fluids. It is an automated machine that dispenses or coats fluids onto the surface or interior of a product, enabling three-dimensional or four-dimensional dispensing with precise positioning, accurate glue control, and preventing stringing, leakage, or dripping. Dispensing machines are primarily used in product manufacturing processes to precisely dispense, inject, coat, or drip adhesives, paints, and other liquids onto specific locations on each product. They can be used to create dots, lines, circles, or arcs.

[0003] As shown in the reference case "Residual Glue Cleaning Container and Dispensing Needle Cleaning Device" (Announcement No. CN219985596U), it includes a sealed cylinder with a negative pressure port and a receiving cavity inside; a sealed cover on the sealed cylinder with a cleaning port; and a material cup located inside the receiving cavity and below the cleaning port. This utility model's residual glue cleaning container and dispensing needle cleaning device uses the negative pressure port to create a vacuum inside the sealed cylinder, thereby extracting residual glue from the dispensing needle inserted into the cleaning port. The residual glue falls into the material cup below, completing the cleaning of the residual glue on the dispensing needle while simultaneously recycling the cleaned residual glue, reducing material waste and the possibility of residual glue polluting the environment. However, the above device still has the following problems;

[0004] In practical applications, once the adhesive has cured, it adheres tightly to the needle tip, making it difficult to completely detach the cured adhesive block from the needle tip using negative pressure, resulting in poor cleaning performance. Utility Model Content

[0005] Therefore, it is necessary to provide a dispensing machine needle cleaning device to address the problem that it is difficult to completely remove the cured adhesive from the needle tip under negative pressure, resulting in poor cleaning effect.

[0006] A dispensing machine needle cleaning device includes: a cleaning cylinder with a sealing cap at the top and a through hole at the center of the top of the sealing cap; the cleaning cylinder being filled with cleaning fluid; and a cleaning mechanism disposed on the cleaning cylinder, the cleaning mechanism including a pressure tube fixedly connected to the upper part of the surface of the cleaning cylinder, one end of the pressure tube being connected to a multi-position solenoid valve, a quick connector being fixedly installed on the multi-position solenoid valve for connecting to an external air source, and an expansion sealing plug connected to the multi-position solenoid valve being installed in the through hole.

[0007] In one embodiment, a pressure gauge is provided on the top of the sealing cover, a scale mark is provided inside the cleaning cylinder, a handle is provided on the top of the cleaning cylinder, and the detection end of the pressure gauge passes through the sealing cover and extends into the internal cavity of the cleaning cylinder.

[0008] In one embodiment, a boss is fixedly connected to the bottom of the sealing cover, and an external thread is formed on the outer surface of the boss. An internal thread corresponding to the external thread is formed on the upper part of the inner wall of the cleaning cylinder.

[0009] In one embodiment, a sealing ring is fixedly connected to the bottom of the sealing cover, and a sealing groove corresponding to the sealing ring is opened on the top of the cleaning cylinder.

[0010] In one embodiment, a through hole extends through the boss, and a scraper sleeve is fixedly connected to the bottom of the boss. The scraper sleeve is funnel-shaped.

[0011] In one embodiment, the expansion sealing plug is provided corresponding to the through hole and the scraper sleeve, and the expansion sealing plug is a rubber plug.

[0012] In one embodiment, the cleaning mechanism further includes an ultrasonic transducer disposed at the bottom of the cleaning cylinder, and a heating plate is also disposed at the bottom of the cleaning cylinder.

[0013] In one embodiment, the emitting surface of the ultrasonic transducer faces the internal cavity of the cleaning cylinder.

[0014] In one embodiment, the inner diameter of the scraper sleeve gradually decreases from top to bottom, and its minimum inner diameter is smaller than the outer diameter of the needle to be cleaned.

[0015] In one embodiment, the heating plate is electrically connected to a temperature controller mounted on the cleaning cylinder to adjust the temperature of the cleaning fluid to a preset range.

[0016] Beneficial effects

[0017] The above-mentioned dispensing machine needle cleaning device is equipped with a cleaning mechanism. An external air source pressurizes the expansion sealing plug, causing it to expand and press against the needle to be cleaned, preventing air leakage between the expansion sealing plug and the needle. Then, air is injected into the cleaning cylinder, increasing the pressure inside. The cleaning fluid in the cleaning cylinder rises under pressure and comes into contact with the glue in the needle, dissolving and cleaning it. The cleaning effect is good. By adjusting the air pressure, the height of the cleaning fluid can be changed, thereby adjusting the cleaning position for convenient use.

[0018] An ultrasonic transducer and heating plate are installed to heat the cleaning solution, thereby increasing its activity. This, combined with vibration, further enhances the cleaning effect on the needle. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in this utility model 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0022] Figure 3 This is a schematic diagram of the sealing cap of this utility model;

[0023] Figure 4 This is a schematic diagram of the internal structure of the cleaning cylinder of this utility model;

[0024] Figure 5 This is a schematic diagram of the expansion sealing plug of this utility model.

[0025] Figure label:

[0026] 100. Cleaning cylinder; 110. Sealing cap; 1101. Boss; 1102. Sealing ring; 1103. Scraper sleeve; 1104. Sealing groove; 200. Cleaning mechanism; 210. Pressurization pipe; 220. Multi-position solenoid valve; 230. Expansion sealing plug; 240. Pressure gauge; 250. Ultrasonic transducer; 260. Heating plate. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0028] The following is combined with Figures 1-5 This invention describes a needle cleaning device for a dispensing machine.

[0029] In one embodiment, a dispensing machine needle cleaning device includes: a cleaning cylinder 100, a sealing cap 110 on the top of the cleaning cylinder 100, a through hole at the center of the top of the sealing cap 110, and a cleaning fluid filling the cleaning cylinder 100; a cleaning mechanism 200 disposed on the cleaning cylinder 100, the cleaning mechanism 200 including a pressure tube 210 fixedly connected to the upper part of the surface of the cleaning cylinder 100, one end of the pressure tube 210 connected to a multi-position solenoid valve 220, a quick connector fixedly installed on the multi-position solenoid valve 220 for communication with an external air source, and an expansion sealing plug 230 connected to the multi-position solenoid valve 220 installed in the through hole.

[0030] like Figure 1 , Figure 2 and Figure 4 As shown, a pressure gauge 240 is installed on the top of the sealing cap 110, and graduation marks are provided inside the cleaning cylinder 100. A handle is provided on the top of the cleaning cylinder 100. The sensing end of the pressure gauge 240 passes through the sealing cap 110 and extends into the internal cavity of the cleaning cylinder 100. An expansion sealing plug 230 is provided corresponding to the through hole and the scraper sleeve 1103, and the expansion sealing plug 230 is a rubber plug. The cleaning mechanism 200 also includes an ultrasonic transducer 250 located at the bottom of the cleaning cylinder 100, and a heating plate 260 is also provided at the bottom of the cleaning cylinder 100. The emitting surface of the ultrasonic transducer 250 faces the internal cavity of the cleaning cylinder 100. The heating plate 260 is electrically connected to a temperature controller installed on the cleaning cylinder 100 to adjust the cleaning fluid temperature to a preset range.

[0031] In this embodiment, when an external air source inflates the expansion sealing plug 230 via the multi-position solenoid valve 220, the rubber expansion sealing plug 230 expands radially, locking the needle inserted into the through hole and achieving a dynamic seal. When the multi-position solenoid valve 220 is switched to supply air to the pressure tube 210, the compressed gas pushes the cleaning fluid level in the cleaning cylinder 100 upward, completely immersing the needle and creating positive fluid pressure, promoting the dissolution of the colloid. The cavitation effect generated by the ultrasonic transducer 250 peels away residual colloid from the inner wall of the needle, and the heating plate 260 maintains the optimal cleaning temperature under the regulation of the temperature controller. The three work together to significantly improve the cleaning efficiency of stubborn adhesive stains.

[0032] The cleaning cylinder 100 is made of high-strength transparent PC material, capable of withstanding a maximum internal air pressure of 0.8MPa, preventing deformation during high-pressure cleaning. The cylinder surface has precision graduations for accurate control of the cleaning fluid volume, reducing waste. The scraper sleeve 1103 is made of polytetrafluoroethylene (PTFE) to improve corrosion resistance. When the needle is pulled up, the scraper sleeve 1103 generates radial scraping force through an interference fit, scraping away the colloid and cleaning fluid on the needle surface, reducing secondary contamination. The expansion sealing plug 230 is made of high-elasticity silicone rubber; after inflation, it shortens axially and expands radially, ensuring an interference fit between the outer diameter and the through hole after expansion, without affecting the scraping effect of the scraper sleeve 1103 on the needle. The pressure gauge 240 is a digital precision pressure sensor electrically connected to the PLC controller to monitor the cleaning pressure in real time. When the pressure exceeds the limit, it triggers the multi-position solenoid valve 220 to release pressure, ensuring safety. The ultrasonic transducer 250 adopts a sandwich-type piezoelectric ceramic structure. A safety pressure relief valve (not shown in the diagram) is provided on the top of the sealing cap 110. It automatically releases pressure when the internal pressure of the cleaning cylinder 100 exceeds a threshold, preventing overpressure risks. When air is introduced into the expansion sealing plug 230, the air supply to the pressurization pipe 210 is automatically cut off to prevent seal failure caused by simultaneous needle fixation and liquid level pressurization. The inlet pressure is dynamically adjusted based on the feedback value from the pressure gauge 240, allowing the liquid level to rise uniformly until the needle is completely submerged.

[0033] It should be noted that a radial O-ring seal is used between the ultrasonic transducer 250 and the bottom mounting hole of the cleaning cylinder 100. The O-ring is made of fluororubber. The cable lead-out hole of the ultrasonic transducer 250 is encapsulated with epoxy resin. The gap between the cable and the cylinder wall is filled with thermally conductive epoxy resin to meet both sealing and heat dissipation requirements.

[0034] like Figure 2 , Figure 3 and Figure 4 As shown, a boss 1101 is fixedly connected to the bottom of the sealing cap 110. The outer surface of the boss 1101 has external threads, and an internal thread corresponding to the external threads is formed on the upper part of the inner wall of the cleaning cylinder 100. A sealing ring 1102 is fixedly connected to the bottom of the sealing cap 110, and a sealing groove 1104 corresponding to the sealing ring 1102 is formed on the top of the cleaning cylinder 100. A scraper sleeve 1103 is fixedly connected to the bottom of the boss 1101. The scraper sleeve 1103 is funnel-shaped. The inner diameter of the scraper sleeve 1103 gradually decreases from top to bottom, and its minimum inner diameter is smaller than the outer diameter of the needle to be cleaned.

[0035] In this embodiment, the threaded connection between the boss 1101 and the cleaning cylinder 100 ensures the pressure-resistant locking of the sealing cap 110, preventing cap detachment under high pressure conditions. The sealing ring 1102 nested in the sealing groove 1104 forms a double radial seal, preventing the cleaning fluid from leaking along the cylinder wall. The funnel-shaped scraper sleeve 1103 has a gradually narrowing inner diameter design, making the minimum inner diameter smaller than the outer diameter of the needle, automatically scraping off the adhesive residue adhering to the needle surface during the needle lifting process, reducing secondary contamination.

[0036] Working principle: Insert the needle to be cleaned into the through hole, with the needle extending into the scraper sleeve 1103 and its bottom extending into the lower part of the cleaning cylinder 100. Activate the multi-position solenoid valve 220 to switch to sealing mode, allowing compressed air to enter the expansion sealing plug 230, causing it to expand radially and lock the needle, forming an airtight seal. Then switch the multi-position solenoid valve 220 to cleaning mode, injecting compressed air into the cylinder through the pressurization pipe 210, pushing the cleaning fluid level up. The cleaning solution completely submerges the needle, creating positive fluid pressure to promote colloid softening. The ultrasonic transducer 250 is activated, and high-frequency vibration generates cavitation bubbles. When the bubbles collapse, they release micro-jets that impact the inner wall of the needle. The heating plate 260 heats the cleaning solution to the optimal temperature, accelerating the thermal motion of colloid molecules, reducing viscosity, and working in conjunction with the cavitation effect to remove residue. After cleaning, the gas source is turned off, and the needle is pulled up after natural pressure release. The scraper sleeve 1103 scrapes off the residual colloid on the surface. The handle is rotated to open the sealing cap 110, disengaging the boss 1101 from the cleaning cylinder 100. The cleaning solution in the cleaning cylinder 100 is then poured out, completing the cleaning cycle.

[0037] It should be noted that the multi-position solenoid valve 220, ultrasonic transducer 250 and heating plate 260 mentioned above are all devices with relatively mature existing technology. The specific models can be selected according to actual needs. At the same time, the multi-position solenoid valve 220, ultrasonic transducer 250 and heating plate 260 can be powered by mains power. The specific power supply method is selected according to the situation and will not be elaborated here.

[0038] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A needle cleaning device for a dispensing machine, characterized in that, include: A cleaning cylinder (100) is provided with a sealing cap (110) at the top. A through hole is provided at the center of the top of the sealing cap (110). The cleaning cylinder (100) is filled with cleaning fluid. A cleaning mechanism (200) is disposed on a cleaning cylinder (100). The cleaning mechanism (200) includes a pressurizing pipe (210) fixedly connected to the upper part of the surface of the cleaning cylinder (100). One end of the pressurizing pipe (210) is connected to a multi-position solenoid valve (220). A quick connector is fixedly installed on the multi-position solenoid valve (220) and connected to an external air source. An expansion sealing plug (230) connected to the multi-position solenoid valve (220) is installed in the through hole.

2. The dispensing machine needle cleaning device according to claim 1, characterized in that, A pressure gauge (240) is provided on the top of the sealing cover (110), a scale mark is provided inside the cleaning cylinder (100), a handle is provided on the top of the cleaning cylinder (100), and the detection end of the pressure gauge (240) passes through the sealing cover (110) and extends into the internal cavity of the cleaning cylinder (100).

3. The dispensing machine needle cleaning device according to claim 1, characterized in that, The sealing cap (110) is fixedly connected to a boss (1101) at the bottom. The outer surface of the boss (1101) is provided with an external thread, and the inner wall of the cleaning cylinder (100) is provided with an internal thread corresponding to the external thread at the upper position.

4. The dispensing machine needle cleaning device according to claim 2, characterized in that, A sealing ring (1102) is fixedly connected to the bottom of the sealing cover (110), and a sealing groove (1104) corresponding to the sealing ring (1102) is opened on the top of the cleaning cylinder (100).

5. The dispensing machine needle cleaning device according to claim 4, characterized in that, A through hole passes through the boss (1101), and a scraper sleeve (1103) is fixedly connected to the bottom of the boss (1101). The scraper sleeve (1103) is funnel-shaped.

6. The dispensing machine needle cleaning device according to claim 5, characterized in that, The expansion sealing plug (230) is provided corresponding to the through hole and the scraper sleeve (1103), and the expansion sealing plug (230) is a rubber plug.

7. The dispensing machine needle cleaning device according to claim 1, characterized in that, The cleaning mechanism (200) also includes an ultrasonic transducer (250) disposed at the bottom of the cleaning cylinder (100), and a heating plate (260) is also disposed at the bottom of the cleaning cylinder (100).

8. The dispensing machine needle cleaning device according to claim 7, characterized in that, The emitting surface of the ultrasonic transducer (250) faces the internal cavity of the cleaning cylinder (100).

9. The dispensing machine needle cleaning device according to claim 6, characterized in that, The inner diameter of the scraper sleeve (1103) gradually decreases from top to bottom, and its minimum inner diameter is smaller than the outer diameter of the needle to be cleaned.

10. The dispensing machine needle cleaning device according to claim 7, characterized in that, The heating plate (260) is electrically connected to a temperature controller installed on the cleaning cylinder (100) to adjust the temperature of the cleaning fluid to a preset range.

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