CN111482326B

CN111482326B - Nozzle assembly and glue dispensing device adopting same

Info

Publication number: CN111482326B
Application number: CN202010398532.0A
Authority: CN
Inventors: 刘建芳; 崔建松; 顾守东
Original assignee: Jiangsu Gaokai Precision Fluid Technology Co ltd
Current assignee: Jiangsu Gaokai Precision Fluid Technology Co ltd
Priority date: 2020-05-12
Filing date: 2020-05-12
Publication date: 2021-06-22
Anticipated expiration: 2040-05-12
Also published as: CN111482326A

Abstract

The invention provides a nozzle assembly and a dispensing device adopting the same. The nozzle assembly includes: a nozzle comprising a nozzle body and an orifice formed in the nozzle body, the orifice extending within the nozzle body and penetrating the nozzle body to form a spout; the shielding piece comprises a baffle plate and an exit port formed through the baffle plate; an elastic element. After at least one of the nozzle and the shielding piece is driven by the outside, the shielding piece and the nozzle move oppositely, and after the outside driving is removed, the nozzle and the shielding piece move back to the original position under the driving of the elastic potential energy of the elastic element. Because the baffle effectively blocks, can effectual reduction the scattered some of the glue of exit port outgoing, simultaneously the shielding piece adopts the auto-recovery structure, and convenient like this utilizes cleaning device to the cleanness of the spout of nozzle at some glue in-process.

Description

Nozzle assembly and glue dispensing device adopting same

Technical Field

The invention relates to the field of spraying, in particular to a nozzle assembly and a dispensing device adopting the same.

Background

With the rapid development of the electronic industry, the requirements for electronic packaging are higher and higher, and for the high-requirement electronic packaging technology, the non-contact injection valve is more and more widely applied in the electronic packaging field with the advantages of high efficiency, high precision and the like. The piezoelectric stack with high response speed and high precision is used as a core driving component of the non-contact piezoelectric injection valve, and is widely applied to the non-contact injection valve. However, in the non-contact spraying dispensing, since the glue is sprayed out at a high pressure by impacting the nozzle with the firing pin, some glues impact and generate scattered spots, and especially in the optical industry and the semiconductor industry, the scattered spots directly affect the yield of products. Scatter may accumulate around the nozzle opening and affect the next injection, potentially causing more scatter in the next injection. The scattered points can not be completely eradicated sometimes under the principle that non-contact is spraying, and the scattered points can only be reduced as much as possible and the influence of the scattered points on products can be avoided.

Therefore, some solutions for improving scatter are necessary to reduce the adverse effect of scatter.

Disclosure of Invention

The invention aims to provide a nozzle assembly and a dispensing device adopting the nozzle assembly, which can reduce scattered points in a non-contact type spraying process.

To achieve the object, according to one aspect of the present invention, there is provided a nozzle assembly including: a nozzle comprising a nozzle body and an orifice formed in the nozzle body, the orifice extending within the nozzle body and penetrating the nozzle body to form a spout; the shielding piece comprises a baffle plate and an exit port formed through the baffle plate, and the exit port is positioned in the injection direction of the nozzle and aligned with the nozzle; and a resilient element; wherein after at least one of the nozzle and the shielding piece is driven by the outside, the shielding piece and the nozzle move towards each other until the nozzle hole passes through the ejection port and is exposed out of the baffle plate, the elastic element accumulates elastic potential energy during the process of the relative movement of the shielding piece and the nozzle, after the external drive is removed, the nozzle and the shielding piece move back towards each other until the original position is recovered under the drive of the elastic potential energy accumulated by the elastic element, and the nozzle hole and the ejection port are separated by a preset distance in the original position.

According to another aspect of the present invention, there is provided a dispensing apparatus, comprising: a non-contact injection valve comprising the nozzle assembly described above; a drive mechanism assembly; and a cleaning device including a contact portion and a wiping portion. The nozzle assembly and the cleaning device move in opposite directions and are in contact with each other under the driving of the driving mechanical assembly, the contact part of the cleaning device abuts against and pushes the shielding piece of the nozzle assembly, so that the shielding piece moves towards the nozzle of the nozzle assembly until the nozzle hole passes through the ejection port and is exposed out of the baffle, the wiping part of the cleaning device wipes the nozzle hole, after wiping of the nozzle hole is completed, the nozzle assembly and the cleaning device move back and are out of contact under the driving of the driving mechanical assembly, and the shielding piece is far away from the nozzle under the driving of the elastic potential energy accumulated by the elastic element until the position is recovered.

Compared with the prior art, the invention adopts the shielding piece with the exit port to collect scattered spots generated at the nozzle of the nozzle, can effectively reduce the scattered spots of the glue emitted from the exit port, and simultaneously adopts the automatic recovery structure, when the shielding piece and the nozzle are close to each other, the nozzle is exposed from the exit port, thereby being convenient for cleaning the nozzle by using a cleaning device in the dispensing process.

Drawings

FIG. 1 is a schematic perspective view of a nozzle assembly of the present invention in one embodiment;

FIG. 2 is an exploded perspective view of the nozzle assembly of FIG. 1;

FIG. 3 is a schematic cross-sectional view of the nozzle assembly of FIG. 1, wherein the exit orifice of the shield of the nozzle assembly is spaced a predetermined distance from the exit orifice of the nozzle;

FIG. 4 is a schematic cross-sectional view of the nozzle assembly of FIG. 1 in another condition wherein the shield of the nozzle assembly is retracted into the housing of the nozzle assembly upon externally-actuated actuation thereof to expose the nozzle orifice of the nozzle assembly;

FIG. 5 is a schematic perspective view of a cleaning device of the present invention in one embodiment;

FIG. 6 is a cross-sectional schematic view of the cleaning apparatus of FIG. 5;

fig. 7 is a schematic perspective view of a non-contact injection valve according to an embodiment of the present invention.

Detailed Description

To further explain the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description of the embodiments, structures, features and effects according to the present invention will be given with reference to the accompanying drawings and preferred embodiments.

The invention provides a nozzle assembly for a non-contact injection valve, which can reduce scattered points in a non-contact injection process, thereby reducing adverse effects of the scattered points on products.

FIG. 1 is a perspective view of a nozzle assembly 100 of the present invention in one embodiment. Fig. 2 is an exploded perspective view of the nozzle assembly 100 of fig. 1. Fig. 3 is a cross-sectional schematic view of the nozzle assembly 100 of fig. 1. FIG. 4 is a cross-sectional schematic view of the nozzle assembly of FIG. 1 in another state. As shown in fig. 1-4, the nozzle assembly 100 includes a housing 110, a shroud 120, a resilient element 130, a nozzle 140, and a mount 150.

The housing 110 includes an end wall 111 and a side wall 112 formed to extend from the end wall 111. The end wall 111 and the side wall 112 form a receiving cavity 113. The end wall 111 is formed with a receiving port 114 penetrating the end wall 111 and communicating with the receiving chamber 113. The end wall 111 is formed with a rib 115 projecting into the receiving opening 114.

The mount 150 includes a mount body 151 and a passage 152 extending through the mount body 151. The mounting seat body 151 may be received in the receiving cavity 113 of the housing 110, and the mounting seat body 151 may be fixed to the inner side of the sidewall 112 of the housing 110 by screw-fitting.

The nozzle 140 includes a nozzle body 141, a spray chamber 142 formed in the nozzle body 141, and a spray hole 143 formed in the nozzle body 141 and communicating with the spray chamber 142. The orifice 143 extends within the nozzle body 141 and penetrates the nozzle body 141 to form a spout 1431. In the figure, the spray cavity 142 of the nozzle 140 has a reverse taper shape, and the apex of the reverse taper shape 142 communicates with the spray hole 143. In other embodiments, the spray chamber 142 may have other shapes, such as a rectangular parallelepiped, a triangular, a spherical, etc. In some embodiments, the spraying cavity 142 may even be omitted, and only the spraying hole 143 is left to achieve the corresponding function.

The nozzle body 141 includes a shoulder 1411, a head 1412 extending from the shoulder 1411, and a boss 1413 formed on the head 1412. The spout 1431 is formed on the boss 1413. The shoulder 1411 of the nozzle body 141 is fixed between the housing 110 and the mounting seat 150, the head 1412 of the nozzle body 141 is located in the receiving opening 114 of the housing 110 and spaced from the inner sidewall of the receiving opening 114, and the channel 152 in the mounting seat 150 is communicated with the spray chamber 142 of the nozzle 140.

A first shoulder matching groove (not numbered) is provided at a position where the mount body 151 contacts the shoulder 1411 of the nozzle body 141, and a second shoulder matching groove (not numbered) is provided at a position where the end wall 111 of the housing 110 contacts the shoulder 1411 of the nozzle body 141. The second shoulder matching groove makes positioning very accurate and convenient when the nozzle 140 is assembled in the housing 110, and the first shoulder matching groove facilitates assembling and positioning of the mounting seat 150 and the nozzle 140 and realizes sufficient sealing of the mounting seat 150 and the nozzle 140 when the mounting seat 150 is assembled in the housing 110. Of course, in some embodiments, the first shoulder mating groove and the second shoulder mating groove may not be provided.

The shutter 120 includes a baffle plate 121, an exit port 122 formed through the baffle plate 121, a sidewall 123 formed to extend from the baffle plate 121, and a flange 124 formed to extend outward from one end of the sidewall 123. The exit port 122 is located in the ejection direction of the ejection orifice 1431 and aligned with the ejection orifice 143. The rib 115 of the housing 110, the inner wall of the receiving opening 114 of the housing 110 and the nozzle body 141 together enclose an activity space 116. The flange 124 of the shutter 120 is located in the movable space 116 and can move along the guide of the movable space 116, and the rib 115 of the housing 110 blocks the flange 134 of the shutter 120 to prevent the shutter 120 from being separated from the housing 110. The elastic element 130 is disposed between the nozzle body 141 and the shutter 130 and located in the movable space 116. The elastic member 130 may be a spring.

When assembling, the shielding member 120 is assembled in the receiving opening 140 of the housing 110, wherein the flange 124 of the shielding member 120 contacts with the rib 115 of the housing 110, the elastic element 130 is assembled in the receiving opening 140 of the housing 110, the nozzle 140 is assembled in the housing receiving cavity 113, and the mounting seat 150 is mounted in the receiving cavity 113 of the housing 110.

As shown in fig. 3, when the shutter 120 is in the original position (or referred to as the working position, the initial position or the falling position), the nozzle 1431 and the exit port 122 are separated by a predetermined distance, and the predetermined distance can be adjusted as required, so that the fluid ejected from the nozzle 1431 of the nozzle 140 flies a predetermined distance and then exits through the exit port 122. The fluid may be glue or other fluid, and the glue is taken as an example for description. Since the exit port 122 is spaced from the spout 1431 by a predetermined distance, most of the scattered points generated at the spout 1431 during the non-contact spraying process cannot pass through the spout 1431 but are blocked by the baffle 121, so that the scattered points of the glue exiting from the exit port can be effectively reduced, and the adverse effect of the scattered points of the glue on the product yield can be reduced or eliminated. After the nozzle assembly 100 has been in operation for a period of time, such as 7 days, the nozzle assembly 100 may be opened to clean the barrier 120 to remove stray spots blocked by the barrier 120.

In addition, the nozzle 1431 may inevitably accumulate some scatter due to the continuous spraying of glue, which is likely to generate more scatter in the next spraying. To solve this problem, as shown in fig. 4, the shutter 120 is driven externally and can move toward the nozzle 140 until the spout 1431 passes through the exit port 122 and is exposed outside the shutter 121. When the shutter 120 is in the wiping position (or referred to as the raised position or the moved position), the spout 1431 is flush with or protrudes from the exit opening 122, and the spout 1431 can be cleaned by an automatic cleaning device (described in detail below), although other methods can be used. In the embodiment shown in fig. 4, the spout 1431 protrudes from the exit opening 122, but it is obvious that the spout 1431 may be flush with the exit opening 122, that is, the outer surfaces of the spout 1431 and the exit opening 122 are substantially flush. When the shutter 120 moves towards the nozzle 140, the elastic element 130 is elastically deformed to accumulate elastic potential energy, and when the external driving is removed, the elastic element 130 drives the shutter 120 to return to the original position, i.e. the position shown in fig. 3, by the elastic potential energy accumulated, so as to perform normal non-contact type spraying. In this way, the spout 1431 may also be cleaned periodically, reducing or eliminating the accumulation of scatter around the spout 1431, reducing the scatter of glue ejected from the spout 1431. The glue is one of the fluids ejected by the nozzle assembly 100 of the present invention, and other fluids may be ejected in addition to the glue.

In summary, the nozzle assembly of the present invention reduces the adverse effect of scattering on the product during the non-contact spraying process by: when the whole nozzle assembly is installed on the injection valve body to work, most of glue can be sprayed out from the outlet 122 of the shielding piece when the glue is sprayed out from the spray opening 1431, most of glue scattering points generated at the spray opening 1431 can be blocked by the baffle plate 121, and even if some of the scattering points are sprayed out from the outlet 122 of the shielding piece, the scattering points can fall around the main liquid drop, so that the product can not be poor. When the nozzle assembly 100 is driven to the cleaning device after a period of time (e.g., 1 hour or 3 hours), the nozzle assembly 100 is lowered as a whole, when the shielding member 120 contacts the cleaning device, the shielding member 120 moves towards the nozzle 140 against the spring pressure, the nozzle 1431 exposes the shielding member 120, the cleaning device is then used to wipe off the residual glue at the nozzle 1431, after the cleaning is completed, the nozzle assembly 100 moves upwards as a whole, and the shielding member 120 returns to the original position under the spring pressure.

One of the advantages of the invention is that: 1) the adopted shielding piece can effectively collect scattered dots generated at the nozzle, so that the yield of dispensing is greatly improved; 2) the shielding piece adopts an automatic return structure, so that the nozzle 1431 can be cleaned by a cleaning device in the dispensing process conveniently.

Those skilled in the art will recognize that insubstantial modifications can be made to the nozzle assembly, while still achieving the intended results, without departing from the spirit of the invention.

In a modified embodiment, the resilient member 130 can be disposed between and secured to the rib 115 of the housing 110 and the flange 124 of the shield 120, such that when the shield 120 is moved toward the nozzle 140, the resilient member 130 pulls the shield 120 to provide a resilient return force. Of course, there may be other ways to arrange the elastic element 130, as long as the elastic element 130 can be deformed when the shutter 120 moves towards the nozzle 140, and the elastic element 130 can provide the shutter 120 with an elastic restoring force to restore the original position after the external driving is removed.

In another modified embodiment, the housing 110 may not be provided with the side wall 112, the mounting seat 150 may not be provided in the receiving cavity 113 of the housing 112, the mounting seat 150 may be provided with a cavity, and the housing 110 may be assembled in the cavity of the mounting seat 150, so as to maintain the relative position relationship and the relative movement relationship between the nozzle 140 and the shutter 120.

In another modified embodiment, the nozzle 140, the shutter 120 and the resilient element 130 may be assembled together to form the nozzle assembly 100, for example, the nozzle 140 may be provided with an associated mechanism to directly engage with the shutter 120, and the resilient element 130 may be disposed therebetween to maintain the relative positions of the two and provide a resilient return force. Such an arrangement is also possible in some embodiments.

In a further modified embodiment, the nozzle body 141 may be provided with a tapered tip end, and the nozzle 1431 is formed at the tapered tip end, so that the protrusion 1413 need not be separately provided.

In a further improved embodiment, the nozzle 140 can be moved relative to the shield 120, and the shield 120 is fixed relative to each other, so that the nozzle 140 and the shield 120 can also be moved toward and away from each other. Of course, in such embodiments, the relative configurations of the mounting base 150 and the housing 110 would also need to be modified accordingly.

According to another aspect of the present invention, there is also provided a dispensing apparatus including the non-contact type injection valve 700, a driving mechanism assembly (not shown), and the cleaning apparatus 200.

Fig. 7 is a schematic perspective view of a non-contact injection valve according to an embodiment of the present invention. As shown in fig. 7, the non-contact injection valve 700 includes a nozzle assembly and an injection valve body 710 as described above. For the injection valve body 710, reference may be made to the document with patent number 201720781223.5 entitled split droplet dispensing device, which is not a focus of this document and will not be described herein again.

FIG. 5 is a schematic perspective view of a cleaning device 200 of the present invention in one embodiment; fig. 6 is a schematic cross-sectional view of the cleaning apparatus 200 of fig. 5. The cleaning device 200 includes a contact portion 211 and a wiping portion 220. The nozzle assembly 100 and the cleaning device 200 move towards and contact with each other under the driving of the driving mechanism assembly, the contact portion 211 of the cleaning device 200 abuts against and pushes the shielding member 120 of the nozzle assembly 100, so that the shielding member 120 moves towards the nozzle 140 of the nozzle assembly 100 until the nozzle 1431 passes through the exit port 122 and is exposed out of the baffle plate 121, the wiping portion 220 of the cleaning device 200 wipes the nozzle 1431, after the wiping of the nozzle 1431 is completed, the nozzle assembly 100 and the cleaning device 200 move away from and out of contact with each other under the driving of the driving mechanism assembly, and the shielding member 120 moves away from the nozzle 140 under the driving of the elastic potential energy accumulated by the elastic element 130 until the original position is recovered.

Specifically, the driving mechanism assembly is connected to the non-contact injection valve 700 and drives the non-contact injection valve 700 to move. The wiping part 220 may be a sponge or the like.

As shown in fig. 5, the cleaning device 200 includes a driving motor 230 and a turntable 210, the turntable 210 is recessed downward from a top surface to form a rear receiving groove, the wiping portion 220 is received in the receiving groove, the top surface of the turntable 210 is the contact portion 211, and the turntable 210 is connected to a driving shaft of the driving motor 230. When wiping the nozzle orifice, the driving motor 230 drives the turntable 210 to rotate, so as to drive the wiping portion 220 to wipe the nozzle orifice.

Of course, the cleaning device 220 may have various specific configurations and is not limited to the one shown in fig. 5. For example, the cleaning device 220 may also be provided with a driving component for driving the wiping part 220 to perform reciprocating translation, so that the wiping is cleaner.

As used herein, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, including not only those elements listed, but also other elements not expressly listed.

In this document, the terms front, back, upper and lower are used to define the components in the drawings and the positions of the components relative to each other, and are used for clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.

The features of the embodiments and embodiments described herein above may be combined with each other without conflict.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. A nozzle assembly, comprising:

a nozzle comprising a nozzle body and an orifice formed in the nozzle body, the orifice extending within the nozzle body and penetrating the nozzle body to form a spout;

the shielding piece comprises a baffle plate and an exit port formed through the baffle plate, and the exit port is positioned in the injection direction of the nozzle and aligned with the nozzle; and

an elastic element;

wherein after at least one of the nozzle and the shielding piece is driven by the outside, the shielding piece and the nozzle move towards each other until the nozzle hole passes through the ejection port and is exposed out of the baffle plate, the elastic element accumulates elastic potential energy during the process of the relative movement of the shielding piece and the nozzle, after the external drive is removed, the nozzle and the shielding piece move back towards each other until the original position is recovered under the drive of the elastic potential energy accumulated by the elastic element, and the nozzle hole and the ejection port are separated by a preset distance in the original position.

2. The nozzle assembly of claim 1, wherein the nozzle body includes a protrusion, and the spout is formed on the protrusion, and after the shutter and the nozzle move toward each other, the protrusion is received in the exit port such that the spout passes through the exit port and is exposed outside the shutter, and the spout is flush with or protrudes from the exit port.

3. The nozzle assembly of claim 1, wherein in situ, fluid ejected from the nozzle flies a predetermined distance before exiting through the exit port; the spout can be cleaned when it passes through the exit port and is exposed outside the baffle.

4. A nozzle assembly according to claim 1, wherein the nozzle is fixed and the shield is externally driven towards the nozzle, the shield being driven away from the nozzle by the resilient element after removal of the external drive.

5. The nozzle assembly of claim 1, further comprising:

the shell comprises an end wall, wherein a containing opening penetrating through the end wall and a convex rib protruding into the containing opening are formed in the end wall;

a mounting seat;

wherein the shield further comprises a side wall extending from the baffle plate and a flange extending outwardly from one end of the side wall,

the shell is fixedly connected with the mounting seat, the nozzle body is fixed between the shell and the mounting seat, at least part of the nozzle body is positioned in the containing opening of the shell and is spaced from the inner wall of the containing opening,

the convex rib of the shell, the inner wall of the containing port of the shell and the nozzle body jointly enclose a movable space, the flange of the shielding piece is positioned in the movable space and can move along the guidance of the movable space, the convex rib of the shell blocks the flange of the shielding piece to prevent the shielding piece from being separated from the shell,

the elastic element is connected with the shielding piece, when the shielding piece is driven by the outside to move towards the nozzle, the elastic element is elastically deformed to accumulate elastic potential energy, and after the outside is driven to be removed, the elastic element drives the shielding piece to be away from the nozzle until the flange of the shielding piece abuts against the convex rib of the shell.

6. The nozzle assembly of claim 5,

the mounting seat comprises a mounting seat body and a channel penetrating through the mounting seat body;

the nozzle also comprises a spray cavity which is formed in the nozzle body and communicated with the spray hole, the nozzle body comprises a shoulder part, a head part which is formed by extending from the shoulder part and a bulge part which is formed on the head part, the spray hole is formed on the bulge part,

the shoulder part of the nozzle body is fixed between the shell and the mounting seat, the head part of the nozzle body is positioned in the containing opening of the shell and is spaced from the inner side wall of the containing opening, a channel in the mounting seat is communicated with the spray cavity of the nozzle,

the elastic element is arranged between the nozzle body and the shielding piece or between the shell and the shielding piece.

7. The nozzle assembly of claim 6,

the shell also comprises a side wall formed by extending from the end wall, the mounting seat body is connected to the inner side of the side wall of the shell through threaded fit,

the spraying cavity of the nozzle is in an inverted cone shape, the vertex of the inverted cone shape is communicated with the spraying hole,

a first shoulder matching groove is formed in the position, in which the mounting seat body is contacted with the shoulder of the nozzle body;

a second shoulder matching groove is formed in the position, where the end wall of the shell is in contact with the shoulder of the nozzle body;

the elastic element is a spring, and the spring is arranged between the nozzle body and the shielding piece and is positioned in the movable space.

8. A kind of glue dropping apparatus, characterized by that, it includes:

a non-contact injection valve comprising a nozzle assembly according to any one of claims 1 to 7;

a drive mechanism assembly; and

a cleaning device including a contact portion and a wiping portion;

the nozzle assembly and the cleaning device move oppositely and contact with each other under the driving of the driving mechanical assembly, the contact part of the cleaning device abuts against and pushes the shielding piece of the nozzle assembly, so that the shielding piece moves towards the nozzle of the nozzle assembly until the nozzle passes through the ejection port and is exposed out of the baffle, the wiping part of the cleaning device wipes the nozzle, after wiping of the nozzle is completed, the nozzle assembly and the cleaning device move oppositely and are out of contact with each other under the driving of the driving mechanical assembly, and the shielding piece is far away from the nozzle under the driving of the elastic potential energy of the elastic element accumulation until the position is recovered.

9. The dispensing apparatus of claim 8, wherein the actuating mechanism is coupled to the non-contact injection valve and actuates the non-contact injection valve.

10. The dispensing apparatus according to claim 8, wherein the cleaning device comprises a driving motor and a turntable, the turntable is recessed downward from a top surface thereof to form a rear receiving groove, the wiping portion is received in the receiving groove, the top surface of the turntable is the contact portion, and the turntable is connected to a driving shaft of the driving motor.