CN112718413B

CN112718413B - Sealing method and sealing device for composite part

Info

Publication number: CN112718413B
Application number: CN202011417642.3A
Authority: CN
Inventors: 王伟库; 何升利; 吴楚辉; 周冰汝; 王庆瑞
Original assignee: Fulian Yuzhan Technology Shenzhen Co Ltd
Current assignee: Fulian Yuzhan Technology Shenzhen Co Ltd
Priority date: 2020-12-05
Filing date: 2020-12-05
Publication date: 2023-04-07
Anticipated expiration: 2040-12-05
Also published as: CN112718413A

Abstract

The present application proposes a method of sealing a composite comprising a first component and a second component with a gap therebetween, wherein the sealing method comprises the steps of: arranging a closure at one side of the gap; placing the composite in glue so that the glue enters the gap; ultrasonically cleaning the composite to remove the glue on the surface of the composite on the side away from the enclosure; drying the composite piece to solidify the glue in the gap; and removing the closure. The sealing method provided by the application can enable the sealed composite piece to have a good waterproof effect. The present application further provides a sealing device for a composite part.

Description

Sealing method and sealing device for composite part

Technical Field

The application relates to a sealing method and a sealing device for a composite part.

Background

In the manufacturing process of electronic products such as mobile phones, two heterogeneous materials (such as metal and plastic) are usually required to be combined, however, a gap usually exists between the metal and the plastic after the combination. In order to meet the waterproof requirement of electronic products, a composite member composed of metal and plastic is usually immersed in glue, vacuumized, pressed into a gap, cleaned by ultrasonic waves, and dried. However, after ultrasonic cleaning, the glue in the gap is washed out in a large amount, resulting in a decrease in the waterproof capability of the electronic product.

Disclosure of Invention

In view of this, the present application provides a sealing method for a composite member with a good waterproof effect.

The present application further provides a sealing device for a composite part.

The present application provides a method of sealing a composite comprising a first component and a second component with a gap therebetween, wherein the sealing method comprises the steps of:

arranging a closure on one side of the gap;

placing the composite in glue so that the glue enters the gap;

ultrasonically cleaning the composite to remove the glue on the surface of the composite on the side away from the enclosure;

drying the composite piece to solidify the glue in the gap; and

removing the closure.

The present application also provides a sealing arrangement for a composite comprising a first component and a second component with a gap therebetween, wherein the sealing arrangement comprises:

a sealing device for arranging a sealing object at one side of the gap;

the glue groove is internally provided with glue for enabling the glue to enter the gap;

the ultrasonic cleaning device is used for ultrasonically cleaning the glue on the surface of the composite part, which is far away from the side of the enclosure; and

and the drying device is used for curing the glue in the gap.

According to the composite member, the sealing object is arranged on one side of the gap, and the sealing object can prevent a large amount of glue from being washed out due to the existence of the communicated gap when the composite member is washed, so that the sealing performance of the composite member is improved, and the composite member has a good waterproof effect.

Drawings

FIG. 1 is a schematic illustration of a composite provided in some embodiments of the present application after a closure has been provided on one side of the composite.

Fig. 2 is a schematic view of the composite of fig. 1 after it has been placed in glue.

FIG. 3 is a schematic view of the composite of FIG. 2 before and after ultrasonic cleaning.

Fig. 4 is a schematic view of the closure of fig. 3 after removal of the closure.

Fig. 5 is a schematic structural view of a sealing device provided in some embodiments of the present application.

FIG. 6 is a graph of the leak rating of the composite provided in the examples and comparative examples of the present application.

Principal elements description of the symbols

Composite part 10

First part 11

Projection 110

Second component 12

Gap 13

Closure 20

Accommodation space 21

Glue 30

Air bubble 31

Cleaning agent 32

Sealing device 40

Closure device 401

Glue tank 402

Vacuum apparatus 403

Pressurizing device 404

Ultrasonic cleaning device 405

Drying device 406

The following detailed description will further illustrate the present application in conjunction with the above-described figures.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, 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 application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

To further explain the technical means and effects of the present application for achieving the intended purpose, the following detailed description is given to the present application in conjunction with the accompanying drawings and preferred embodiments.

Referring to fig. 1, some embodiments of the present application provide a method of sealing a composite 10, the composite 10 including a first component 11 and a second component 12. A gap 13 is present between the first part 11 and the second part 12.

In some embodiments, the width of the gap 13 is 1-15 μm and the length of the gap 13 is 1-5mm.

The sealing method comprises the following steps:

step S11: a closure 20 is provided on one side of the slit 13.

In some embodiments, the first component 11 includes a projection 110. The closure 20 is disposed on the projection 110.

In some embodiments, the protrusion 110, the second member 12 and the closure 20 together form a receiving space 21.

In some embodiments, the shortest straight distance between the closure 20 and the slit 13 is 0.5mm to 20mm. In some embodiments, the closure 20 may be disposed against the slit 13 or may be spaced apart from the slit 13. It is worth mentioning that the closure 20 is arranged at a distance from the slit 13 to make the receiving space 21. It should be noted that fig. 1 is only a schematic illustration, the length of the closure 20 at least forms the accommodating space 21, and if the length of the closure 20 is increased, the combining force between the closure 20 and the composite member 10 can be increased, and the closure 20 can be prevented from falling off during the manufacturing process.

In some embodiments, the closure 20 may be selected from at least one of a closure membrane and a closure plug. In some embodiments, the material of the sealing film may be a polymer. Specifically, the polymer may be one of polyethylene, polypropylene, and polyethylene terephthalate, and the like. In some embodiments, the material of the closing plug may be rubber. Specifically, the rubber may be polyacrylate, silica gel, or the like.

In some embodiments, the first component 11 does not include the projection 110. The closure 20 is disposed on the first and

second components

11, 12. I.e. the closure 20 is arranged on one side of the slit 13.

Step S12: referring to fig. 2, the composite part 10 is placed in the glue 30, such that the glue 30 enters the gap 13. It should be noted that fig. 2 is only a schematic representation, and the composite part 10 is entirely immersed in a container containing the glue 30, and for convenience of illustration, only the glue distribution on both sides of the gap 13 is shown in fig. 2.

In some embodiments, the glue 30 further enters the accommodating space 21 through the slit 13, and the accommodating space 21 can be used as a glue storage space for storing the glue 30.

In some embodiments, after placing the composite part 10 in the glue 30, a vacuum and a pressure can be applied to the container in which the glue 30 is placed, so that the glue 30 can better enter the gap 13 and the receiving space 21.

Referring to fig. 3, since the vacuum cannot completely remove the air in the composite part 10 and the air in the container in which the glue 30 is placed, there are air bubbles 31 in the glue 30 in the gap 13 after the glue 30 enters the gap 13.

Step S13: referring again to fig. 3, the composite 10 is ultrasonically cleaned to remove the glue 30 from the surface of the composite 10 on the side away from the closure 20.

In some embodiments, the composite 10 is placed in a cleaning agent 32 and ultrasonic waves are applied to the cleaning agent 32 to clean the composite 10. In some embodiments, the rinsing agent 32 may be deionized water. In some embodiments, the cleaning agent 32 may be a solution with a surfactant or other detergent added.

The closure 20 prevents the glue 30 in the slit 13 near the side of the closure 20 from being washed out during cleaning. In some embodiments, the ultrasonic wave may promote the glue 30 to flow in the gap 13 and promote the glue 30 in the accommodating space 21 to enter the gap 13, so as to solve the defect that part of the glue 30 in the gap 13 is washed out, and simultaneously discharge the air bubbles 31 in the gap 13.

In some embodiments, the power density of the ultrasonic wave is 0.5W/L-20W/L, and the vibration frequency of the ultrasonic wave is in the range of 28kHz-120kHz.

Step S14: drying the composite 10 to cure the glue 30 in the gap 13.

Step S15: referring to fig. 4, the closure 20 is removed.

After removing the closure 20, the composite 10 is cleaned to remove the glue 30 on the surface of the composite 10 on the side adjacent to the closure 20.

Referring to fig. 5, some embodiments of the present application further provide a sealing device 40 for a composite 10, where the composite 10 includes a first component 11 and a second component 12, and a gap 13 exists between the first component 11 and the second component 12.

In some embodiments, the sealing device 40 includes a sealing device 401, a glue tank 402, a vacuum device 403, a pressurizing device 404, an ultrasonic cleaning device 405, and a drying device 406.

In some embodiments, the closure device 401 positions a closure 20 on one side of the slit 13. In some embodiments, the closure device 401 may be a robotic arm.

In some embodiments, the glue groove 402 is provided with glue 30, and the glue groove 402 is used for allowing the glue 30 to enter the gap 13.

In some embodiments, the vacuum device 403 is used to evacuate the glue tank 402 to prevent air bubbles from being generated in the glue 30 and to promote the glue 30 to enter the gap 13.

In some embodiments, the pressurizing device 404 is used to pressurize the glue tank 402 to facilitate the entry of the glue 30 into the gap 13.

In some embodiments, the ultrasonic cleaning device 405 is used to ultrasonically clean the glue 30 on the surface of the composite part 10 on the side away from the closure 20. In some embodiments, the ultrasonic cleaning device 405 further comprises a cleaning agent 32. In some embodiments, the cleaning agent may be deionized water.

In some embodiments, the drying device 406 is used to cure the glue 30 in the gap 13.

The present application will be specifically described below by way of examples and comparative examples.

Examples

In a first step, a composite is provided, comprising a first part and a second part, between which a gap of 10 μm width is present, on one side of which a closure is provided.

And secondly, putting the composite part into glue for dipping, vacuumizing and pressurizing a container for placing the glue so as to enable the glue to enter the gap.

And thirdly, after the composite part is taken out, ultrasonically cleaning the composite part to remove the glue on the surface of the composite part, which is far away from one side of the closed object.

And fourthly, drying the composite piece to enable the glue in the gap to be solidified.

And fifthly, removing the closure.

And sixthly, cleaning the composite piece again to remove the glue on the surface of the composite piece close to one side of the closed object.

Comparative example

The method comprises the steps of firstly, providing a composite part, wherein the composite part comprises a first part and a second part, a gap with the width of 10 mu m is formed between the first part and the second part, putting the composite part into glue for dipping, vacuumizing and pressurizing a container for placing the glue, and enabling the glue to enter the gap.

And secondly, after the composite part is taken out, ultrasonically cleaning the composite part to remove the glue on the surface of the composite part.

And thirdly, drying the composite piece to solidify the glue in the gap.

The composites before and after impregnation in the examples and comparative examples were subjected to a leak test, respectively.

Referring to fig. 6, it can be seen that the composite of the example is rated E100% before dipping, and when dipped, the composite is rated a 90% and the worst leakage is rated C. The composite of the comparative example was rated 100% E before gum dipping, and when gum dipping, only 30% of the composite was rated a, and still 50% was rated D and E. (Note, leakage rating: A:0sccm-0.05sccm, B:0.05sccm-0.2sccm, C:0.2sccm-0.5sccm, D:0.5sccm-1sccm, E: 1 sccm). It can be seen that the closure of the embodiments improves the sealing of the composite, so that the composite has a better waterproof effect.

The present application arranges the closure 20 at one side of the gap 13, and the closure 20 can prevent the composite 10 from being washed out by a large amount of the glue 30 due to the existence of the gap 13, which is conducted during cleaning, thereby improving the sealing performance of the composite 10 and enabling the composite 10 to have a better waterproof effect.

The above embodiments are only used to illustrate the present application, but the present invention is not limited to only such embodiments in practical applications. Other modifications and variations to the technical concept of the present application should fall within the scope of the present application for those skilled in the art.

Claims

1. A method of sealing a composite comprising a first component and a second component with a gap therebetween, wherein the method of sealing comprises the steps of:

arranging a closure on one side of the gap;

placing the composite in glue so that the glue enters the gap;

drying the composite piece to solidify the glue in the gap; and

removing the closure;

wherein, the first part includes the bulge, the closure sets up in the bulge, the second part and the closure forms a accommodation space jointly, in the step of putting into the glue with the complex piece in, the glue gets into the accommodation space through the gap.

2. The sealing method of claim 1, wherein the closure comprises at least one of a closure membrane and a closure plug.

3. The sealing method according to claim 2, wherein the sealing film is made of a polymer, and the sealing plug is made of rubber.

4. The sealing method of claim 1, wherein after placing the composite into the glue, the sealing method further comprises:

vacuumizing a container for placing the glue; and

the container in which the glue is placed is pressurized.

5. The sealing method of claim 1, wherein after removing the closure, the sealing method further comprises:

and cleaning the composite piece to remove the glue on the surface of the composite piece close to one side of the closed object.

6. The sealing method according to claim 1, wherein the power density of the ultrasonic wave is 0.5W/L to 20W/L, and the vibration frequency of the ultrasonic wave is in the range of 28kHz to 120kHz.

7. The sealing method according to claim 1, wherein the shortest straight distance between the closure and the slit is 0.5mm to 20mm, the width of the slit is 1 μm to 15 μm, and the length of the slit is 1mm to 5mm.

8. A sealing arrangement for a composite comprising a first component and a second component with a gap therebetween, wherein the sealing arrangement comprises:

a sealing device for arranging a sealing object at one side of the gap; wherein the first member comprises a protrusion, the closure is disposed on the protrusion, and the protrusion, the second member and the closure together form an accommodating space;

the glue tank is internally provided with glue for enabling the glue to enter the gap;

and the drying device is used for curing the glue in the gap.

9. The sealing device of claim 8, further comprising:

the vacuum device is used for vacuumizing the glue tank; and

and the pressurizing device is used for pressurizing the glue tank.