CN219377731U

CN219377731U - Dispensing head

Info

Publication number: CN219377731U
Application number: CN202223213754.4U
Authority: CN
Inventors: 李群续; 万梦婷
Original assignee: Nuyun Intelligent Technology Jiangsu Co ltd
Current assignee: Nuyun Intelligent Technology Jiangsu Co ltd
Priority date: 2022-12-01
Filing date: 2022-12-01
Publication date: 2023-07-21
Anticipated expiration: 2032-12-01

Abstract

The utility model discloses a dispensing head, comprising: the dispensing head body is provided with a glue-discharging flow passage, and two ends of the glue-discharging flow passage are respectively a glue inlet end and a glue outlet end; and the anti-sticking film is arranged on the dispensing head body and is adjacent to the glue outlet end. The adhesive dispensing head reduces the adhesive quantity adhered to the adhesive dispensing head body in the adhesive dispensing process by arranging the adhesive dispensing head body and the adhesive-preventing film adjacent to the adhesive outlet end, thereby ensuring the integrality of the adhesive particles coated on the surface of the workpiece and improving the adhesive dispensing precision and the adhesive dispensing quality.

Description

Dispensing head

Technical Field

The utility model relates to the technical field of dispensing, in particular to a dispensing head.

Background

The dispensing valve is equipment used in photovoltaic, photoelectric and sublimation industries, and is mainly used for uniformly coating glue or other liquid media at positions needing dispensing or gluing, so that the purposes of packaging, bonding, fixing, heat conduction and the like are achieved.

The dispensing head is used as an output element of the dispensing valve, and is of a cylindrical or tubular structure, the dispensing valve is in a dispensing process, the dispensing head is close to the surface of a workpiece, glue is input from one end of the dispensing head, bulge is formed at the output of the other end of the dispensing head, along with the increase of the bulge of the output glue, the glue is attached to the surface of the workpiece to form glue drops, the glue drops are in contact with the dispensing head and the workpiece at the moment, and then the dispensing head is far away from the workpiece, so that dispensing operation of a certain position on the surface of the workpiece is completed.

However, in the dispensing operation process, because the dispensing head is contacted with the dispensed glue drop before being far away from the dispensing position of the workpiece, after the dispensing head is far away from the dispensing position of the workpiece, part of glue is easily adhered to the end of the dispensing head, so that the glue drop and the glue quantity attached to the surface of the workpiece are reduced, and the glue dispensing precision of the dispensing valve is further reduced. Particularly in a precise dispensing system, the control requirement on the glue quantity is very strict, the dispensing quantity of common glue is in milligram level, and the dispensing quantity of single-point glue is required to be 10%, so that the dispensing quantity deviation is required to be controlled within 0.1 milligram. In the dispensing output process of the dispensing valve in the prior art, part of glue in the glue drops remains on the surface of the dispensing head, so that the glue amount attached to a workpiece is reduced, and the requirement of a precise dispensing system is difficult to meet.

Therefore, there is a need for an improvement in the prior art dispensing heads.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art and provides a dispensing head which reduces the glue quantity adhered to the surface of the dispensing head so as to improve the dispensing precision and quality.

In order to achieve the technical effects, the technical scheme of the utility model is as follows: a dispensing head comprising:

the dispensing head body is provided with a glue-discharging flow passage, and two ends of the glue-discharging flow passage are respectively a glue inlet end and a glue outlet end;

and the anti-sticking film is arranged on the dispensing head body and is adjacent to the glue outlet end.

Preferably, in order to prevent the glue from adhering to the dispensing head body, the dispensing amount is reduced, and the dispensing precision is reduced, the anti-sticking film comprises an outer anti-sticking part arranged on the outer surface of the dispensing head body and/or an inner anti-sticking part arranged on the inner wall of the glue-discharging runner.

Preferably, in order to further reduce the amount of glue adhering to the dispensing head body, so as to improve the dispensing accuracy, the anti-sticking film includes an outer anti-sticking portion disposed on the outer surface of the dispensing head body and an inner anti-sticking portion disposed on the inner wall of the glue dispensing runner.

Preferably, the anti-sticking film is fixedly arranged on the dispensing head body for convenience, and the outer anti-sticking part is integrally connected with the inner anti-sticking part.

Preferably, in order to expand the anti-adhesion range, the anti-adhesion film is in sealing connection with the end face, the circumferential outer edge and the circumferential inner wall of the glue-spitting runner of the dispensing head body.

Preferably, in order to further increase the anti-sticking range, glue adheres to the dispensing head body in the anti-stop glue process, so that the glue amount attached to the surface of the workpiece is reduced, the dispensing precision is affected, and the anti-sticking film covers the circumferential outer edge of the dispensing head body and the circumferential inner wall of the glue-spraying runner.

Preferably, in order to ensure that glue is evenly output from the glue outlet end of the glue outlet channel, the glue dispensing quality is improved, and the anti-sticking film is evenly distributed on the glue dispensing head body.

Preferably, in order to reduce the thickness of the anti-sticking film and reduce the influence on the change of the dispensing amount of the dispensing head, the anti-sticking film is a nanometer anti-sticking film.

Preferably, in order to increase the bonding strength of the nano film and the dispensing head body, the nano anti-sticking film is a nano anti-sticking film.

Preferably, in order to increase the contact surface between the dispensing head body and the anti-adhesive film, the bonding force between the anti-adhesive film and the dispensing head body is reinforced, the anti-adhesive film is prevented from falling off, and the surface, connected with the anti-adhesive film, of the dispensing head body is a rough surface.

In summary, compared with the prior art, the dispensing head provided by the utility model has the advantages that the adhesive quantity adhered to the dispensing head body in the adhesive dispensing process is reduced through the anti-adhesive film which is arranged on the dispensing head body and adjacent to the adhesive outlet end, so that the integrity of adhesive particles coated on the surface of a workpiece is ensured, and the adhesive dispensing precision and the adhesive dispensing quality are improved.

Drawings

FIG. 1 is a schematic illustration of a prior art dispensing head dispensing;

FIG. 2 is a schematic view of a dispensing head according to the present utility model;

fig. 3 is an enlarged view of a portion a of fig. 2;

FIG. 4 is a schematic illustration of dispensing of the dispensing head of the present utility model;

in the figure: 100. the dispensing head comprises a dispensing head body 200, a dispensing flow passage 201, a glue inlet end 202, a glue outlet end 300, an anti-sticking film 301, an outer anti-sticking part 302, an inner anti-sticking part 400, a dispensing head 500 and a workpiece.

Detailed Description

The following describes the embodiments of the present utility model further with reference to the drawings and examples. The following examples are only for more clearly illustrating the technical aspects of the present utility model, and are not intended to limit the scope of the present utility model.

As shown in fig. 1, when the dispensing head 400 in the prior art performs dispensing operation, glue is introduced into an internal channel of the dispensing head 400, the dispensing head 400 is located right above a workpiece 500, along with the increase of the amount of injected glue in the dispensing head 400, a bulge-shaped glue drop is formed at one end of the dispensing head 400 adjacent to the workpiece, and the size of the glue drop gradually increases along with the increase of the introduced glue; when the glue drops are increased to be in contact with the surface of the workpiece 500 to be dispensed, the glue drops are attached to the surface of the workpiece 500; the dispensing head 400 continues to dispense glue, the size of the glue drops attached to the surface of the workpiece 500 is increased, and the glue drops at the moment are uniformly connected with the end part of the dispensing head 400; because the adhesive effect between the adhesive drop and the workpiece 500 and between the adhesive dispensing head 400 is broken, and the adhesive force between the adhesive drop and the workpiece 500 is greater than the adhesive force between the adhesive drop and the adhesive dispensing head 400, when the adhesive dispensing head 400 moves away from the workpiece 500, the adhesive drop which is originally adhered between the workpiece 500 and the adhesive dispensing head 400 is divided into two parts, wherein the most main part is attached to the surface of the workpiece 500, and a small part of adhesive is attached to the adhesive dispensing head 400. The residual glue on the dispensing head 400 is derived from glue drops between the previous dispensing head 400 and the workpiece 500, so that after the dispensing head 400 moves away from the workpiece 500, the amount of glue attached to the workpiece 500 is reduced, and the amount of glue attached to the surface of the workpiece 500 in the dispensing process is uncertain due to the fact that the amount of residual glue attached to the dispensing head 400 in each dispensing process is uncertain, therefore, the dispensing head 400 in the prior art is used for dispensing, the precision is poor, and the use requirement that the dispensing amount range in a precise dispensing system is within 0.1 milligram is difficult to meet.

To this end, the present utility model discloses a dispensing head, as shown in fig. 2-4, comprising:

the dispensing head body 100 is provided with a dispensing runner 200, and two ends of the dispensing runner 200 are respectively provided with a glue inlet end 201 and a glue outlet end 202;

the anti-adhesive film 300 is disposed on the dispensing head body 100 and adjacent to the dispensing end 202.

The dispensing head body 100 comprises, but is not limited to, a needle-shaped structure, so that the dispensing flow passage 200 is integrally formed into a straight strip shape, when dispensing is performed, the dispensing head body 100 and the dispensing flow passage 200 inside the dispensing head body are arranged along the vertical direction, a workpiece 500 to be dispensed is placed under the dispensing flow passage 200, the top end of the dispensing flow passage 200 is a glue inlet end 201, glue is continuously conveyed to a glue outlet end 202 through external transmission pressure (generated by air compression or rotation of a rotor screw driven by a motor) so that the glue outlet end 202 dispenses the glue, a glue drop attached to the surface of the workpiece 500 is formed, and when the dispensing head body 100 moves away from the workpiece 500, an anti-adhesive film 300 is arranged at a position adjacent to the glue outlet end 202 on the dispensing head body 100, so that the bonding force between the glue drop and the dispensing head body 100 is not compatible with the anti-adhesive film 300, the bonding force between the glue drop and the workpiece 500 is far greater than the bonding force between the glue drop and the dispensing head body 100, so that the adhesive force between the glue drop and the adhesive film 100 is greatly reduced, the adhesive drop is remained on the dispensing head body 100, the adhesive drop is not more than the adhesive film 300, and the adhesive dispensing head body is designed, and the adhesive dispensing accuracy of the dispensing head body is not to be ignored when the dispensing head 100 is designed, and the adhesive dispensing head 100 is not attached to the adhesive head 100.

In a preferred embodiment, the anti-sticking film 300 includes an outer anti-sticking portion 301 disposed on the outer surface of the dispensing head body 100 and an inner anti-sticking portion 302 disposed on the inner wall of the dispensing flow channel 200. The glue amount remained on the outer surface of the dispensing head body 100 can be reduced through the outer anti-sticking part 301, and the glue amount remained on the inner surface of the dispensing head body 100 (namely, the inner wall of the glue-discharging flow channel 200) can be reduced through the inner anti-sticking part 302 in the same way, so that the glue amount remained on the dispensing head body 100 after dispensing is further reduced through the combined action of the outer anti-sticking part 301 and the inner anti-sticking part 302, the integrity of glue adhesion and retention on the dispensing surface of the workpiece 500 after dispensing treatment is ensured, and the dispensing precision and the dispensing quality are further improved.

In a preferred embodiment, the anti-sticking film 300 is a nano anti-sticking film, and further, the nano anti-sticking film is a nano anti-sticking film. Because the aperture of the glue-spraying flow channel 200 in the dispensing head body 100 in the prior art is more than 100um, and the nano anti-sticking film is used as a nano film, the thickness of the nano film is in the nano level (generally between 1nm and 900nm, and the thickness is adjustable), so that the thickness of the nano anti-sticking film is far smaller than the inner diameter of the glue-spraying flow channel 200, the space of the glue-spraying flow channel 200 occupied by the nano anti-sticking film is almost negligible, and the reduction of the glue-spraying amount of the dispensing head body 100 caused by the occupation space of the nano anti-sticking film is avoided; in addition, the nanometer anti-sticking film is a nanometer anti-sticking film, specifically, the nanometer anti-sticking film adopts a vacuum film plating mode, after plasma activation treatment is carried out on the surface of the dispensing head body 100 (used for increasing the adhesive force between the dispensing head body 100 and the anti-sticking film 300), a layer of material which is not compatible with glue is formed on the surface of the dispensing head body, so that glue residues are adhered to the dispensing head body 100 in the glue stopping prevention process, the glue amount on the surface of a workpiece 500 is reduced, and the glue dispensing precision is affected.

In a preferred embodiment, the outer release portion 301 is integrally connected with the inner release portion 302; further, the anti-sticking film 300 is in sealing connection with the end face, the circumferential outer edge and the circumferential inner wall of the glue dispensing runner 200 of the dispensing head body 100, and the anti-sticking film 300 is uniformly distributed on the dispensing head body 100. After the structure mode is adopted, when vacuum coating is carried out, the outer wall of the dispensing head body 100 and the circumferential inner wall of the dispensing runner 200 are subjected to coating treatment, so that the outer wall of the dispensing head body 100 forms an outer anti-sticking part 301, the circumferential inner wall of the dispensing runner 200 forms an inner anti-sticking part 302, the outer anti-sticking part 301 and the inner anti-sticking part 302 are integrally connected and formed into an anti-sticking film 300, and the thickness of the anti-sticking film 300 is uniform, thus the reduction of the glue amount on the workpiece 500 caused by the fact that glue in the dispensing process of the dispensing head body 100 remains on the surface of the dispensing head body 100 is avoided, the dispensing precision and the dispensing quality are effectively improved, and finally the glue amount deviation of the single point on the surface of the workpiece 500 is controlled within 0.1mg when dispensing is carried out, and the use requirement of a precise dispensing system is met.

In a preferred embodiment, the surface of the dispensing head body 100 connected to the anti-adhesive film 300 is a rough surface. After the design is adopted, the contact area of the anti-sticking film 300 and the dispensing head body 100 is increased, so that the bonding acting force of the anti-sticking film 300 and the dispensing head body 100 is enhanced, and the anti-sticking film 300 is prevented from falling off.

In another preferred embodiment, the anti-sticking film 300 covers the circumferential outer edge of the dispensing head body 100 and the circumferential inner wall of the dispensing runner 200. In this way, the coverage of the anti-sticking film 300 is increased to prevent glue from being adhered to the dispensing head body 100, and to ensure smooth cleaning of the surface of the dispensing head body 100 while ensuring accurate dispensing amount.

The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that it will be apparent to those skilled in the art that several modifications and variations can be made without departing from the technical principle of the present utility model, and these modifications and variations should also be regarded as the scope of the utility model.

Claims

1. A dispensing head, comprising:

the dispensing head comprises a dispensing head body (100) and a dispensing device, wherein a dispensing flow channel (200) is arranged, and two ends of the dispensing flow channel (200) are respectively provided with a glue inlet end (201) and a glue outlet end (202);

and the anti-sticking film (300) is arranged on the dispensing head body (100) and is adjacent to the dispensing end (202).

2. The dispensing head of claim 1, wherein: the anti-sticking film (300) comprises an outer anti-sticking part (301) arranged on the outer surface of the dispensing head body (100) and/or an inner anti-sticking part (302) arranged on the inner wall of the glue-discharging runner (200).

3. The dispensing head of claim 2, wherein: the anti-sticking film (300) comprises an outer anti-sticking part (301) arranged on the outer surface of the dispensing head body (100) and an inner anti-sticking part (302) arranged on the inner wall of the glue-discharging runner (200).

4. A dispensing head according to claim 3, characterized in that: the outer anti-sticking part (301) is integrally connected with the inner anti-sticking part (302).

5. The dispensing head of claim 4, wherein: the anti-sticking film (300) is in sealing connection with the end face, the circumferential outer edge and the circumferential inner wall of the glue-spraying runner (200) of the dispensing head body (100).

6. The dispensing head of claim 1, wherein: the anti-sticking film (300) covers the circumferential outer edge of the dispensing head body (100) and the circumferential inner wall of the glue-spitting flow channel (200).

7. The dispensing head of claim 1, wherein: the anti-sticking films (300) are uniformly distributed on the dispensing head body (100).

8. The dispensing head of claim 7, wherein: the anti-sticking film (300) is a nanometer anti-sticking film.

9. The dispensing head of claim 8, wherein: the nanometer anti-sticking film is a nanometer anti-sticking film.

10. The dispensing head of claim 1, wherein: one surface of the dispensing head body (100) connected with the anti-sticking film (300) is a rough surface.