CN111515067A

CN111515067A - Dispensing needle cleaning device

Info

Publication number: CN111515067A
Application number: CN202010484969.6A
Authority: CN
Inventors: 郭霞云; 杨振华; 刘玉诚
Original assignee: Shenzhen Cannice Technology Co Ltd
Current assignee: Shenzhen Cannice Technology Co Ltd
Priority date: 2020-06-01
Filing date: 2020-06-01
Publication date: 2020-08-11

Abstract

The invention discloses a dispensing needle head cleaning device which comprises a cleaning barrel and an air source device, wherein the cleaning barrel is provided with a through hole for inserting a dispensing needle head, an upper annular cavity surrounding the through hole is formed in the wall of a barrel arm at the upper end in the cleaning barrel, and a plurality of cleaning holes penetrating to the through hole are formed in the upper annular cavity; the inner wall of the through hole is provided with an air injection groove which is inclined downwards and is arranged below the cleaning hole; the upper annular cavity and the air injection groove are both communicated with an air source device; when the dispensing needle head is cleaned, the flow rate of the gas ejected by the gas ejecting groove is greater than that of the gas ejected by the cleaning hole. The cleaning device for the dispensing needle head can effectively avoid the situation that the gas sprayed by the gas spraying groove carries residual glue to splash out from the upper opening of the through hole, and can quickly discharge the residual glue into the collecting barrel to avoid the blockage of the through hole.

Description

Dispensing needle cleaning device

Technical Field

The invention relates to a cleaning device, in particular to a dispensing needle head cleaning device.

Background

In the process of dispensing, the adhesive residue can be left over by the adhesive dispensing needle head of the adhesive dispensing device, the adhesive dispensing needle head can be blocked after the adhesive residue is accumulated more, and the adhesive dispensing precision is influenced, even the product quality is influenced.

At present, a through hole is formed in a cleaning barrel, two cleaning holes are oppositely arranged in the through hole, and the two cleaning holes clean residual glue on a glue dispensing needle head positioned in the cleaning through hole through ejecting gas. Cleaning device among the prior art, two clean holes spout gaseous simultaneously and clear up the dispensing needle head, and the gas that spouts probably carries partial cull from the upper shed blowout of through-hole because of lacking the guide, and the cull splashes to cleaning device's environment all around, very big influence cleaning device environment all around.

Disclosure of Invention

The invention aims to provide a dispensing needle cleaning device to overcome the defect that residual glue is easy to splash from an upper opening of a through hole in the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme:

a dispensing needle head cleaning device comprises a cleaning barrel body and an air source device, wherein the cleaning barrel body is provided with a through hole for inserting a dispensing needle head, an upper annular cavity surrounding the through hole is formed in the wall of one end of the cleaning barrel body, and a plurality of cleaning holes penetrating through the through hole are formed in the wall of the upper annular cavity;

the inner wall of the through hole is provided with an air injection groove which is inclined downwards, and the air injection groove is arranged below the cleaning hole;

the upper annular cavity and the air injection groove are both communicated with the air source device;

when the dispensing needle head is cleaned, the flow rate of the gas ejected by the gas ejecting groove is greater than that of the gas ejected by the cleaning hole.

Optionally, a lower annular cavity arranged around the through hole is formed in the wall of the cleaning barrel body, the lower annular cavity is located below the upper annular cavity, the air injection groove is an inclined annular groove, the annular groove is communicated with the lower annular cavity and the through hole, and one end, close to the lower annular cavity, of the annular groove is higher than one end, close to the through hole, of the annular groove.

Optionally, the cleaning cylinder comprises a core, an upper cylinder and a lower cylinder;

the outer walls of the two ends of the core body are provided with steps;

the upper cylinder body is in threaded connection with the core body, and the upper annular cavity is formed among the upper cylinder body, the first step of the step and the second step of the step;

the lower cylinder body is in threaded connection with the core body, and the lower annular cavity is formed among the lower cylinder body, the third step of the step and the fourth step of the step;

the fourth step is provided with the slope that the back taper was kept off the face, down the barrel be equipped with the slope keeps off the face relative arch, protruding with the slope keeps off and leaves the clearance between the face, protruding with the slope keeps off the face and constitutes jet-propelled groove.

The dispensing needle cleaning device further comprises a first sealing element, a second sealing element and a sealing gasket, wherein the first sealing element is arranged at the joint of the first step and the upper barrel; the second sealing element is arranged at the joint of the third step and the lower cylinder; the sealing gasket is arranged between the upper barrel and the lower barrel, and two side faces of the sealing gasket are respectively abutted against the upper barrel and the lower barrel.

Optionally, be equipped with the intercommunication on the outer wall of last barrel go up the first air inlet in cyclic annular chamber, set up the intercommunication down on the outer wall of barrel the second air inlet in cyclic annular chamber, be provided with first air pipe joint on the first air inlet, be provided with the second air pipe joint on the second air inlet, the air supply device with be provided with first control valve between the first air pipe joint, the air supply device with be provided with the second control valve between the second air pipe joint.

Optionally, the sum of the cross-sectional areas of all the cleaning holes is not greater than the cross-sectional area of the first air inlet.

Optionally, the number of the cleaning holes is even, the cleaning holes are symmetrically arranged on the inner wall of the through hole, and the height of each cleaning hole is kept consistent.

Optionally, the cleaning device further comprises a support and a collecting bucket, the cleaning barrel is vertically fixed on the support, the collecting bucket is arranged below the cleaning barrel, and a barrel body part extending to the collecting bucket is arranged at the lower end part of the lower barrel.

Optionally, the cleaning holes are arranged obliquely downward from the upper annular cavity to the direction of the through hole, and the axes of all the cleaning holes intersect with the axis of the through hole at a point.

Optionally, a teflon coating is disposed on an inner wall of the through hole.

Compared with the prior art, the invention has the following beneficial effects:

in the embodiment of the invention, the cleaning cylinder body is provided with the through hole, at least three cleaning holes are arranged in the through hole, the air injection groove which is inclined downwards is arranged below the cleaning holes, when the dispensing needle head is cleaned, the flow velocity of air injected by the air injection groove is greater than that of air injected by the cleaning holes, the air injected by the air injection groove which is inclined downwards at a high speed can generate suction to the air above the air injection groove, the air injected by the air injection groove can only flow out from the lower outlet of the through hole under the stress, so that residual glue can only be discharged from the lower opening of the cleaning cylinder body, and the situation that the residual glue is splashed out from the upper opening of the through hole.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

The structure, proportion, size and the like shown in the drawings are only used for matching with the content disclosed in the specification, so that the person skilled in the art can understand and read the description, and the description is not used for limiting the limit condition of the implementation of the invention, so the method has no technical essence, and any structural modification, proportion relation change or size adjustment still falls within the scope of the technical content disclosed by the invention without affecting the effect and the achievable purpose of the invention.

Fig. 1 is a schematic structural view of a cleaning cylinder in a dispensing needle cleaning device according to an embodiment of the present invention;

FIG. 2 is a schematic view of the cross-sectional structure A-A of FIG. 1;

fig. 3 is a schematic structural view of a dispensing needle cleaning device according to an embodiment of the present invention;

fig. 4 is a schematic structural view of a dispensing needle cleaning device according to a second embodiment of the present invention;

fig. 5 is a schematic structural diagram of a dispensing needle cleaning device according to a third embodiment of the present invention.

Illustration of the drawings: 1. cleaning the cylinder body; 11. a through hole; 12. an upper annular cavity; 13. cleaning the hole; 14. an air injection groove; 15. a lower annular cavity; 2. a core body; 21. a first step; 22. a second step; 23. a third step; 24. a fourth step; 25. a sloping baffle surface; 3. an upper cylinder body; 31. a first air inlet; 32. a first gas pipe joint; 33. a protrusion; 4. a lower cylinder body; 41. a second air inlet; 42. a second air pipe joint; 43. a barrel portion; 5. a first sealing element; 6. a second sealing element; 7. a support; 8. a collecting barrel; 9. a gasket seal.

Detailed Description

In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. It should be noted that when one component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present.

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.

Example one

Referring to fig. 1-3, an embodiment of the present invention provides a cleaning device for a dispensing needle, which is used to clean the residual glue on the dispensing needle, and can effectively prevent the residual glue from splashing outside to pollute the environment during the cleaning process, and simultaneously can effectively prevent the residual glue from blocking the through hole 11.

Dispensing needle cleaning device is including clean barrel 1, and clean barrel 1 is provided with and supplies the point to glue syringe needle male through-hole 11, and the barrel is provided with annular chamber 12, goes up annular chamber 12 and sets up the clean hole 13 of a plurality of intercommunication through-hole 11, goes up annular chamber 12 and air supply unit intercommunication, and air supply unit's gas is from clean hole 13 to the point syringe needle blowout of being located in through-hole 11 for accomplish the cleanness to the point syringe needle.

The air injection groove 14 is communicated with an air source device, when the dispensing needle head is cleaned, the flow velocity of gas injected from the air injection groove 14 is larger than that of gas injected from the cleaning hole 13, and the air injected from the air injection groove 14 obliquely downwards forms attraction for the gas injected from the cleaning hole 13 above and residual glue dropped on the dispensing needle head, so that the residual glue is prevented from splashing outside the device from the upper opening of the through hole 11.

In addition, the arrangement of the upper annular cavity 12 is beneficial to balancing the pressure difference of the cleaning holes 13, and the phenomenon that residual glue on the dispensing needle head splashes outwards due to uneven stress caused by overlarge speed difference of gas sprayed from different cleaning holes 13 is avoided.

It should be noted that the residual adhesive is a high-viscosity substance and is extremely likely to adhere to the inner wall of the through-hole 11, resulting in poor air-discharge from the through-hole 11 and easily causing clogging in the through-hole 11. When the air injection groove 14 is used for injecting air, the residual glue above the air injection groove 14 can be attracted to be discharged downwards, and the residual glue below the air injection groove 14 can be blown to be discharged downwards, so that the residual glue in the through hole 11 can be discharged in an accelerated manner. Further, the diameter of the upper opening of the through hole 11 may be set to be adapted to the diameter of the dispensing needle, for example, set to be any value from 3mm to 6mm, and specifically, the diameter of the through hole 11 may be set to be 5 mm.

The cleaning barrel 1 is also internally provided with a lower annular cavity 15, the lower annular cavity 15 is positioned below the upper annular cavity 12, the air injection groove 14 is an inclined annular groove which is communicated with the lower annular cavity 15 and the through hole 11, and one end of the annular groove, which is close to the lower annular cavity 15, is higher than one end of the annular groove, which is close to the through hole 11. Specifically, the shape of the air injection groove 14 is similar to the shape of the inverted cone shell after the shell tip is removed, and is an annular opening which is inclined downwards. The lower annular chamber 15 is provided to help balance the velocity of the gas ejected from the gas ejection slots 14 in all directions. The gas of the gas source can be sprayed out from the through hole 11 from the annular opening of the gas spraying groove 14 obliquely downwards, so that the generation of gas turbulence is avoided. The gas turbulence can influence the collection effect of the residual glue, and the collection speed of the residual glue is reduced.

The cleaning cylinder 1 in the present embodiment includes a core 2, an upper cylinder 3, and a lower cylinder 4.

The core body 2 is screwed with the upper cylinder 3 and forms an upper annular chamber 12, and the lower end of the core body 2 is screwed with the lower cylinder 4 and forms a lower annular chamber 15. Specifically, steps are arranged on the outer walls of the two ends of the core body 2; the upper cylinder 3 is in threaded connection with the core body 2, and an upper annular cavity 12 is formed among the upper cylinder 3, the first step 21 of the step and the second step 22 of the step; the lower cylinder 4 is screwed with the core body 2, and a lower annular cavity 15 is formed among the lower cylinder 4, the third step 23 of the step and the fourth step 24 of the step. It will be appreciated that the second step 22 is provided with a connecting thread.

The lower cylinder 4 is positioned below the upper cylinder 3, the fourth step 24 is provided with an inverted cone-shaped inclined blocking surface 25, a gap is reserved between the protrusion 33 of the lower cylinder 4 and the inclined blocking surface 25, and the protrusion 33 and the inclined blocking surface 25 form an air injection groove 14. The core body 2 is in threaded connection with the upper cylinder body 3, and when foreign matters block the cleaning holes, the core body 2 and the upper cylinder body 3 can be disassembled to clean the foreign matters in the cleaning holes 13 or the upper annular cavity 12; similarly, the core body 2 is in threaded connection with the lower barrel body 4, and if foreign matters block the air injection groove 14 when the device is idle, the foreign matters in the air injection groove 14 or the lower annular cavity 15 can be cleaned after being disassembled.

The first sealing element 5 is provided at the junction of the first step 21 and the upper end of the upper barrel 3, and the core body 2 is screwed with the lower end of the upper barrel 3, it being understood that the screw connection has a good sealing effect. The junction of the third step 23 and the lower cylinder 4 is provided with a second sealing element 6, so that gas can only be ejected from the gas ejection slot 14. A sealing gasket 9 for preventing air leakage is arranged between the upper barrel 3 and the lower barrel 4, one side of the sealing element 9 is abutted against the bottom surface of the upper barrel 3, and the other side is abutted against the top surface of the lower barrel 4. The first sealing element 5, the second sealing element 6 and the sealing gasket 9 are all used for preventing air leakage of the outer side wall of the cleaning cylinder 1. In particular, the first sealing element 5 and the second sealing element 6 are both O-rings.

Optionally, a first air inlet 31 communicated with the upper annular cavity 12 is arranged on the outer wall of the upper barrel 3, a first air pipe joint 32 is arranged on the first air inlet 31, and a first control valve is arranged between the air source device and the first air pipe joint 32 and used for controlling the pressure and the air flow of the air source entering the upper annular cavity 12; a second air inlet 41 communicated with the lower annular cavity 15 is formed in the outer wall of the lower barrel 4, a second air pipe joint 42 is arranged on the second air inlet 41, and a second control valve is arranged between the air source device and the second air pipe joint 42 and used for controlling the pressure and the air flow of air of the air source entering the upper annular cavity 12.

The sum of the sectional areas of all the cleaning holes 13 is not larger than the sectional area of the first air inlet 31, so that the cleaning effect of the dispensing needle head is prevented from being influenced by overlarge pressure drop.

The number of the cleaning holes 13 is even, the cleaning holes 13 are oppositely arranged on the inner wall of the through hole 11, and the heights of the cleaning holes 13 arranged on the inner wall of the through hole 11 are kept consistent.

Dispensing needle cleaning device still includes support 7 and collecting bucket 8, and on clean barrel 1 was vertically fixed in support 7, collecting bucket 8 set up in the below of clean barrel 1, and the lower tip of lower barrel 4 is provided with the barrel 43 that extends to collecting bucket 8. The inner hole of the cylinder part 43 is communicated with the through hole 11, and the residual rubber falls into the collecting barrel from the lower end of the cylinder part 43.

The cleaning holes 13 are arranged obliquely downward from the upper annular chamber 12 toward the through hole 11, and the axes of all the cleaning holes 13 intersect with the axis of the through hole 11 at a point. The inclined downward cleaning hole 13 can further prevent the residual glue from splashing out of the upper opening of the through hole 11.

Further, a moving device for moving the dispensing needle into the through hole 11 may be further provided.

Be provided with teflon (polytetrafluoroethylene) coating on the inner wall of through-hole 11, teflon coating coefficient of friction is extremely low, makes the cull be difficult to the adhesion on the inner wall of through-hole 11, and the jet-propelled groove 14 of cooperation can prevent effectively that through-hole 11 from being blockked up.

Example two

Referring to fig. 4, compared with the first embodiment, the inner diameter of the lower cylinder 4 in the present embodiment is consistent with the diameter of the through hole 11, and the air injection groove 14 penetrates through the through hole 11 obliquely and downwardly. In this embodiment, the upper annular chamber 12 and the lower annular chamber 15 are both connected to a gas source device.

EXAMPLE III

Referring to fig. 5, in the present embodiment, the cleaning cylinder 1 is an integral structure, an upper annular cavity 12 and a lower annular cavity 15 are spaced from top to bottom, the upper annular cavity 12 and the lower annular cavity 15 are both disposed in the cylinder wall of the cleaning cylinder 1 around the through hole 11, the air injection groove 14 is an annular groove, the annular groove penetrates the through hole 11 from the cavity wall of the lower annular cavity to the bottom in an inclined manner, and both the upper annular cavity 12 and the lower annular cavity 15 are communicated with the air source device. In particular, the cross-section of each of the upper annular chamber 12 and the lower annular chamber 15 may be provided as a circle, an ellipse, a rectangle or other shapes. The integrated cleaning cylinder has good air tightness and is beneficial to reducing the volume of the device.

The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. The dispensing needle cleaning device is characterized by comprising a cleaning barrel body (1) and an air source device, wherein the cleaning barrel body (1) is provided with a through hole (11) for inserting a dispensing needle, an upper annular cavity (12) arranged around the through hole (11) is formed in the wall of one end of the cleaning barrel body (1), and a plurality of cleaning holes (13) penetrating through the through hole (11) are formed in the wall of the upper annular cavity (12);

an air injection groove (14) which is inclined downwards is formed in the inner wall of the through hole (11), and the air injection groove (14) is arranged below the cleaning hole (13);

the upper annular cavity (12) and the air injection groove (14) are communicated with the air source device;

when the dispensing needle head is cleaned, the flow rate of gas ejected by the gas ejecting groove (14) is larger than that of gas ejected by the cleaning hole (13).

2. The dispensing needle cleaning device according to claim 1, wherein a lower annular cavity (15) surrounding the through hole (11) is formed in the wall of the cleaning barrel (1), the lower annular cavity (15) is located below the upper annular cavity (12), the air injection groove (14) is an inclined annular groove which communicates the lower annular cavity (15) and the through hole (11), and one end of the annular groove close to the lower annular cavity (15) is higher than one end of the annular groove close to the through hole (11).

3. Dispensing needle cleaning device according to claim 2, characterized in that the cleaning cylinder (1) comprises a core (2), an upper cylinder (3) and a lower cylinder (4);

the outer walls of the two ends of the core body (2) are provided with steps;

the upper cylinder (3) is in threaded connection with the core body (2), and the upper annular cavity (12) is formed among the upper cylinder (3), the first step (21) of the step and the second step (22) of the step;

the lower cylinder (4) is in threaded connection with the core body (2), and the lower annular cavity (15) is formed among the lower cylinder (4), the third step (23) of the step and the fourth step (24) of the step;

fourth step (24) are provided with the slope of back taper and keep off face (25), barrel (4) be equipped with down with the slope keeps off protruding (33) that face (25) are relative, protruding (33) with the slope keeps off and leaves the clearance between face (25), protruding (33) with the slope keeps off face (25) and constitutes jet-propelled groove (14).

4. Dispensing needle cleaning device according to claim 3, further comprising a first sealing element (5), a second sealing element (6) and a sealing gasket (9), said first sealing element (5) being arranged at the junction of said first step (21) and said upper barrel (3); the second sealing element (6) is arranged at the joint of the third step (23) and the lower cylinder (4); the sealing gasket (9) is arranged between the upper barrel (3) and the lower barrel (4), and two side faces of the sealing gasket (9) are respectively abutted against the upper barrel (3) and the lower barrel (4).

5. The dispensing needle cleaning device according to claim 3, wherein a first air inlet (31) communicated with the upper annular cavity (12) is formed in the outer wall of the upper cylinder (3), a second air inlet (41) communicated with the lower annular cavity (15) is formed in the outer wall of the lower cylinder (4), a first air pipe joint (32) is arranged on the first air inlet (31), a second air pipe joint (42) is arranged on the second air inlet (41), a first control valve is arranged between the air source device and the first air pipe joint (32), and a second control valve is arranged between the air source device and the second air pipe joint (42).

6. Dispensing needle cleaning device according to claim 5, characterized in that the sum of the cross-sectional areas of all the cleaning holes (13) is not greater than the cross-sectional area of the first air inlet opening (31).

7. A dispensing needle cleaning device according to claim 1, characterized in that the number of the cleaning holes (13) is even, the cleaning holes (13) are symmetrically arranged on the inner wall of the through hole (11), and the height of each cleaning hole (13) is kept consistent.

8. A dispensing needle cleaning device according to claim 3, further comprising a bracket (7) and a collecting barrel (8), wherein the cleaning barrel (1) is vertically fixed on the bracket (7), the collecting barrel (8) is arranged below the cleaning barrel (1), and a barrel portion (43) extending towards the collecting barrel (8) is arranged at the lower end of the lower barrel (4).

9. Dispensing needle cleaning device according to claim 1, characterized in that the cleaning holes (13) are arranged obliquely downwards from the upper annular chamber (12) in the direction of the through hole (11), the axes of all the cleaning holes (13) intersecting the axis of the through hole (11) at a point.

10. Needle point cleaning device according to claim 1, characterized in that a teflon coating is provided on the inner wall of the through hole (11).