CN115044090A - Method for processing surface of workpiece, shell and electronic equipment - Google Patents

Abstract

The application discloses a method for processing the surface of a workpiece, a shell and electronic equipment, and relates to the technical field of material processing and forming. The method comprises the steps of treating the surface of a high-molecular polymer workpiece by using an organic solvent mixed solution to open molecular chains on the surface layer of the high-molecular polymer workpiece, wherein the organic solvent mixed solution comprises a plurality of organic solvents which have different volatilities and can realize swelling of the high-molecular polymer workpiece to different degrees; and spraying a hardening liquid on the treated surface, and curing the hardening liquid to form a hardened layer. According to the method, the organic solvent mixed solution is used for opening the high molecular polymer molecular chains on the surface layer of the high molecular polymer workpiece, so that the internal stress is released, and the probability of undesirable phenomena such as the curtain coating process and the later cracking is reduced; in addition, the composition of the organic solvent mixed solution, and the volatility and swelling capacity of each organic solvent are controlled, so that the process of internal stress release is controlled, and the quality of the high molecular polymer workpiece and the adhesive force of the high molecular polymer workpiece to the hardened layer are improved.

Description

Method for processing surface of workpiece, shell and electronic equipment

Technical Field

The application relates to the technical field of material processing and forming, in particular to a method for processing the surface of a workpiece, a shell and electronic equipment.

Background

The battery cover has a protruding structure at a local position, and is similar to a crater shape. The integral battery cover with the crater-shaped structure is formed by compression injection molding or direct injection molding of high-molecular polymers, and the battery cover is coated and hardened on the compact surface to form a hardened layer, so that the hardened layer is easy to fall off due to poor adhesion, and internal stress is released due to surface swelling in the coating and hardening process, and further poor phenomena such as cracking and the like occur.

Disclosure of Invention

The technical problem to be solved by the present application is to provide a method for processing a surface of a workpiece, comprising:

treating the surface of a high molecular polymer workpiece by using an organic solvent mixed solution to open molecular chains on the surface layer of the high molecular polymer workpiece, wherein the organic solvent mixed solution comprises a plurality of organic solvents which have different volatilities and can realize swelling of the high molecular polymer workpiece to different degrees;

and spraying a hardening liquid on the treated surface, and curing the hardening liquid to form a hardened layer.

The technical problem that this application will be solved provides a casing, includes:

the surface of the bulge or the surface of the joint of the bulge and the main body part is configured to be treated by organic solvent mixed liquid, a high polymer molecular chain on the surface layer is opened, and the organic solvent mixed liquid comprises a plurality of organic solvents which have different volatility and can realize swelling of high polymer workpieces to different degrees; and

and a hardened layer provided at least on the surface treated with the organic solvent mixed solution.

The technical problem that this application will solve provides an electronic equipment, includes:

as for the shell, the projection part is provided with a camera hole; and

the middle frame is connected with the shell to form an installation space communicated with the camera shooting hole;

the display screen is arranged on one side, far away from the shell, of the middle frame; and

and the camera is arranged in the installation space and is opposite to the camera shooting hole.

Adopt this application technical scheme, the beneficial effect who has does: the surface of the high-molecular polymer workpiece is treated by the organic solvent mixed liquid, and the high-molecular polymer molecular chain on the surface layer of the high-molecular polymer workpiece is opened, so that the internal stress is released, and the probability of undesirable phenomena such as cracking in the curtain coating process and the later stage is reduced. The process of controlling the release of the internal stress is achieved by controlling the composition of the organic solvent mixed solution and the volatility and swelling capacity of each organic solvent. For example, in the specific control process, the composition of the organic solvent mixed solution, the volatility and the swelling capacity of each organic solvent can be controlled, so that the internal stress is slowly released (the internal stress is not released too fast, so that the high molecular polymer workpiece is not cracked well, and cannot be cracked, so as to achieve the improvement effect). Furthermore, the surface layer high molecular chains are slowly released and opened through the internal stress, gaps among the molecular chains are increased, so that the hardening liquid for subsequent curtain coating can easily enter the surface of the high molecular polymer workpiece, the adhesive force of the high molecular polymer workpiece to a hardening layer is effectively improved, and the quality of the high molecular polymer workpiece is improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic flow chart illustrating the processing of a surface of a workpiece according to an embodiment of the present disclosure;

FIG. 2 is a schematic view of a workpiece during injection molding or compression injection molding;

FIG. 3 is a schematic diagram of step S101 of the present application;

FIG. 4 is a schematic flow chart illustrating the processing of a surface of a workpiece according to another embodiment of the present disclosure;

FIG. 5 is a schematic structural diagram of a housing according to an embodiment of the present application;

FIG. 6 is a schematic structural view of the housing of the embodiment of FIG. 5 in another embodiment;

FIG. 7 is a schematic flow chart illustrating the processing of a surface of a workpiece according to another embodiment of the present disclosure;

FIG. 8 is a schematic structural diagram of a housing according to an embodiment of the present application;

FIG. 9 is a schematic structural view of the housing of the embodiment of FIG. 8 in another embodiment;

FIG. 10 is a schematic structural diagram of a housing according to an embodiment of the present application;

FIG. 11 is a schematic structural view of the housing of the embodiment of FIG. 10 in another embodiment;

FIG. 12 is a schematic flow chart illustrating the processing of the surface of the housing according to an embodiment of the present disclosure;

FIG. 13 is a schematic flow chart illustrating the processing of a surface of a workpiece according to another embodiment of the present application;

FIG. 14 is a schematic view of a surface of a workpiece according to an embodiment of the present application;

FIG. 15 is a schematic view of a processed surface of a workpiece according to an embodiment of the present application;

FIG. 16 is a schematic surface view illustrating a hardening liquid being sprayed on a workpiece to form a hardened layer according to an embodiment of the present disclosure;

fig. 17 is a schematic structural diagram of an electronic device in an embodiment of the application.

Detailed Description

The present application will be described in further detail with reference to the accompanying drawings and embodiments. In particular, the following embodiments are merely illustrative of the present application, and do not limit the scope of the present application. Likewise, the following embodiments are only some embodiments of the present application, not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present application.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

The application describes a method for processing the surface of a workpiece, which can be used for facilitating the hardening treatment on the surface of the workpiece and also can be used for facilitating the production of an appearance membrane on the surface of the workpiece. The workpiece can be a plate or a shell, and can also be in other types of structures. In some embodiments, the workpiece, such as a plate or a case, may be used in the electronic device to serve as a housing or a battery cover of the electronic device, thereby improving the appearance of the electronic device. In some embodiments, the housing may also be a portion of the housing, or may be the entire housing.

As used herein, "electronic equipment" (which may also be referred to as a "terminal" or "mobile terminal" or "electronic device") includes, but is not limited to, devices that are configured to receive/transmit communication signals via a wireline connection, such as via a Public Switched Telephone Network (PSTN), a Digital Subscriber Line (DSL), a digital cable, a direct cable connection, and/or another data connection/network, and/or via a wireless interface (e.g., for a cellular network, a Wireless Local Area Network (WLAN), a digital television network such as a DVB-H network, a satellite network, an AM-FM broadcast transmitter, and/or another communication terminal). A communication terminal arranged to communicate over a wireless interface may be referred to as a "wireless communication terminal", "wireless terminal" or "mobile terminal". Examples of mobile terminals include, but are not limited to, satellite or cellular telephones; a Personal Communications System (PCS) terminal that may combine a cellular radiotelephone with data processing, facsimile and data communications capabilities; PDAs that may include radiotelephones, pagers, internet/intranet access, Web browsers, notepads, calendars, and/or Global Positioning System (GPS) receivers; and conventional laptop and/or palmtop receivers or other electronic devices that include a radiotelephone transceiver. A cellular phone is an electronic device equipped with a cellular communication module.

Referring to fig. 1, fig. 1 is a schematic flow chart illustrating a process performed on a surface of a workpiece according to an embodiment of the present disclosure. The method can comprise the following steps:

step S101: and treating the surface of the high molecular polymer workpiece by using the organic solvent mixed solution.

In the case of workpieces, in particular injection-molded or compression-injection-molded workpieces, these are formed by curing the injection-molding material. In one embodiment, the injection molding material is a high molecular polymer, and a high molecular polymer workpiece can be formed.

Referring to fig. 2, fig. 2 is a schematic structural diagram of a workpiece during injection molding or compression injection molding. Among these, during the injection molding or compression injection molding of the workpiece 100, the applicant has found the following phenomena and the corresponding problems:

the surface and the surface layer 102 are cooled quickly, and then the polymer chains in the surface layer 102 are cooled firstly when the natural extension state is not reached, the chain segments are frozen to form a condensation layer, so that the temperature of the inner part 101 is higher than that of the surface layer 102; then, when the interior 101 is cooled, the surface layer 102 of the workpiece 100 is pulled by the internal stress generated by cooling the interior 101, and the molecular chains in the surface layer 102 are stretched and oriented and cannot be naturally curled.

The unstable stretching and condensing state of the polymer chains in the surface layer 102 makes the surface and the surface layer 102 tight, so that the solvent is difficult to corrode and the adhesive force is poor; when the coating is hardened, the workpiece 100 swells under the action of the hardening liquid and internal stress is released through cracking of the workpiece 100, so that the adhesion to a hardened layer is poor and poor appearance is caused.

That is, the applicant finds that the internal stress is released and the adhesion on the surface is poor when the coating is hardened due to asynchronous cooling in the cooling process of the inner part 101 and the surface layer 102, and the problem becomes the first problem to be solved by the applicant.

The applicant treats the surface of the high molecular polymer workpiece by the organic solvent mixed solution, opens the molecular chain on the surface layer of the high molecular polymer workpiece, releases the internal stress, reduces the probability of releasing the internal stress during the spray hardening, and reduces the cracking phenomenon of the high molecular polymer workpiece caused by the spray hardening.

In some embodiments, the treated surface changes the structure of the surface due to the release of internal stress, thereby improving the adhesion of the surface when the curtain coating is hardened.

In some embodiments, the organic solvent mixture includes a plurality of organic solvents with different volatilities that achieve different degrees of swelling for the polymer workpiece. And then the composition of the organic solvent mixed solution, the volatility and the swelling capacity of each organic solvent can be controlled to play a role in controlling the release process of the internal stress, so that the quality of the high-molecular polymer workpiece is improved, and the adhesive force of the high-molecular polymer workpiece to a hardened layer is improved.

In some embodiments, by controlling the volatility, the volatilization speed can be controlled, and the action time of the organic solvent and the high molecular polymer workpiece can be controlled.

In some embodiments, the coordination effect between the organic solvents can be controlled by controlling the swelling capacity (i.e., the degree of swelling), for example, an organic solvent with a strong swelling capacity can swell a high molecular polymer workpiece faster, open a molecular chain faster, and is more advantageous for a surface layer of a high molecular polymer workpiece that is difficult to open than an organic solvent with a weak swelling capacity, and an organic solvent with a strong swelling capacity can coordinate with an organic solvent with a weak swelling capacity, so that the probability of cracking on the surface of the high molecular polymer workpiece caused by too fast opening of the molecular chain by the organic solvent with a strong swelling capacity can be reduced.

In some embodiments, the molecular chain opening process is slow due to the coordination of a plurality of organic solvents with different volatilities and capable of swelling the high molecular polymer workpiece to different degrees, so that internal stress is slowly released, and the surface quality of the high molecular polymer workpiece is guaranteed. Specifically, by matching volatility and swelling capacity (namely swelling degree), the synergy of action degree and action time of the organic solvent and the high molecular polymer workpiece can be realized so as to realize slow release of internal stress. For example, the strong swelling capacity and strong volatility solvent firstly opens the acting force between the surface molecular chains, which is a similar invasive acting mode, at the moment, the invasive action only lasts for a short time by matching with the strong volatility capacity, the strong swelling capacity and strong volatility solvent is volatilized quickly after invading the surface molecular chains of the product, and the molecular chain segments are not as close as or limited as natural curling; then the medium swelling capacity and medium volatility solvent are responsible for keeping the state that the molecular chain on the surface of the product is opened, and provide time for the soaking of the solvent with weak swelling capacity and weak volatility; after the solvent with weak swelling capacity and weak volatility is soaked, the molecular chain on the surface layer of the high molecular polymer product can naturally curl in the solvent for a long time due to the weak volatility. Through control, the opening process is slow, the molecular chain is changed from a stretched orientation state into a natural curling state, the surface layer is not influenced by internal stress any more, the curtain coating solvent is easy to enter the product, and the adhesive force is effectively improved.

In some embodiments, the workpiece may also be a composite of one or more of PMMA (Polymethyl Methacrylate), PC (Polycarbonate), PVC (polyvinyl chloride), and ABS (Acrylonitrile Butadiene Styrene). In some embodiments, the workpiece is a composite of one or more of a transparent glass-like PC material and an acrylic material. It is understood that the workpiece may be formed by compounding other materials and high molecular polymers.

For the workpiece, the cooperation of volatility and swelling capacity (namely swelling degree) can be realized, and the synergy of the action degree and action time of the organic solvent and the high molecular polymer workpiece can be realized so as to realize the slow release of internal stress. For example, the strong swelling capacity and strong volatility solvent firstly opens the acting force between the surface molecular chains, which is a similar invasive acting mode, at the moment, the invasive action only lasts for a short time by matching with the strong volatility capacity, the strong swelling capacity and strong volatility solvent is volatilized quickly after invading the surface molecular chains of the product, and the molecular chain segments are not as close as or limited as natural curling; then the medium swelling capacity and medium volatility solvent are responsible for keeping the state that the molecular chain on the surface of the product is opened, and provide time for the soaking of the solvent with weak swelling capacity and weak volatility; after the solvent with weak swelling capacity and weak volatility is soaked, the molecular chains on the surface layer of the high molecular polymer product can naturally curl in the solvent for a long time due to the weak volatility. By controlling, the opening process is slow, the molecular chain is changed from a stretching orientation state to a natural curling state, the surface layer is not influenced by internal stress any more, and microstructures such as cracks, holes and the like are generated. After the organic solvent mixed liquid is volatilized, the hardening liquid can be better immersed between the polymer chains in the surface through the microstructure, and the adhesive force of the workpiece is improved. In some embodiments, the volatile organic solvent may be allowed to evaporate during the swelling process.

When the organic solvent mixed liquid is used for processing, the organic solvent can be adhered to the workpiece by adopting a spraying mode, a smearing mode and the like. In some embodiments, the swelling degree of the high molecular polymer workpiece can be controlled by controlling the amount of the volatile organic solvent, the spraying time, the coating times and the like, so as to realize reasonable release of the internal stress.

In some embodiments, during the processing, a microstructure, such as a micro-hole, may be formed on the surface of the high molecular polymer workpiece, so that the hardening liquid may be immersed between the high molecular chains in the surface through the microstructure during the curtain coating process, thereby improving the adhesion of the workpiece.

Step S102: and spraying a hardening liquid on the treated surface.

The hardening liquid comprises UV (ultraviolet) hardening liquid. Similarly, the UV hardening liquid promotes the initiator to decompose under the irradiation of ultraviolet rays to generate free radicals, initiates resin reaction, instantly cures to form a film and forms a hardened layer, and has a better environment-friendly effect.

In some embodiments, an appearance membrane can be made on the hardened layer to improve the appearance expression of the workpiece.

In some embodiments, in step S101, the plurality of organic solvents are arranged in an order in which the swelling capacity of the high molecular polymer workpiece decreases, and the volatility decreases in the arranged order.

Through reasonable matching and control of the swelling capacity and volatility of various organic solvents, the curling process and the internal stress release process of the macromolecular chains can be reasonably controlled. In some embodiments, the surface can generate a more uniform microstructure such as micro-holes to improve the adhesion of the workpiece under the reasonable matching and control of the swelling capacity and volatility of various organic solvents.

In some embodiments, the plurality of organic solvents may include at least two.

In some embodiments, the plurality of organic solvents may include three.

In some embodiments, the at least two organic solvents are arranged in an order of decreasing swelling capacity for the high molecular weight polymer workpiece, and the volatility in the arranged order decreases.

In some embodiments, the plurality of organic solvents includes a first organic solvent, a second organic solvent, and a third organic solvent, and the first organic solvent, the second organic solvent, and the third organic solvent sequentially decrease the swelling capacity of the high molecular polymer workpiece, and sequentially decrease the volatility.

In some embodiments, the plurality of organic solvents may be a combination of ketone-based organic solvents, toluene-based organic solvents, and alcohol-based organic solvents. For example, the organic solvent mixture may be a combination of at least one of ketone organic solvents, at least one of toluene organic solvents, and at least one of alcohol organic solvents.

In some embodiments, the plurality of organic solvents may include three, one being a ketone-based organic solvent, another being a toluene-based organic solvent, and a final alcohol-based organic solvent. In some embodiments, the ketone organic solvent, the toluene organic solvent, and the alcohol organic solvent respectively have a reduced swelling capacity and a reduced volatility for the high molecular polymer workpiece. That is, the plurality of organic solvents may include one strong solvent, one medium solvent, and one weak solvent. Wherein, the organic solvent with the strongest swelling capacity and the strongest volatilization performance is a strong solvent, the organic solvent with the weakest swelling capacity and the weakest volatilization performance is a weak solvent, and the rest one is a medium solvent. When the surface of a high molecular polymer workpiece is treated, the action force between surface molecular chains is firstly opened by the strong solvent ketones, which is a similar invasive action mode, but the strong solvent has stronger volatility, the action can only last for a short time, the strong solvent is quickly volatilized after invading the surface molecular chains of the product, and the molecular chain segments are not as close to or limited in natural curling. Then, the toluene as the intermediate solvent is responsible for keeping the molecular chain of the product in an opened state, and provides time for the immersion of the weak solvent alcohol. After the weak solvent alcohol is soaked, the molecular chains on the surface layer of the injection molding product can naturally curl in the solvent for a longer time due to weak volatility. Through the cooperation of various solvents, the action degree and the action time of the organic solvent are cooperated to realize the slow release of the molecular chain stress on the surface of the high molecular polymer workpiece. The molecular chain is changed from a stretched orientation state to a natural curling state, the surface layer is not influenced by internal stress any more, and the curtain coating solvent is easy to enter the product, so that the adhesive force is effectively improved.

Referring to fig. 3, fig. 3 is a schematic view of step S101 of the present application. Initially, the surface layer 102 of the workpiece 100 is subjected to internal stresses, so that the polymer chains in the surface layer 102 are restrained from curling and cannot reach a naturally curled state.

In step A, the workpiece is treated with an organic solvent mixture. In some embodiments, the workpiece may be treated with a plurality of organic solvents mixed from a strong solvent, a medium solvent, and a weak solvent. The solvent has stronger polarity, can destroy hydrogen bonds among molecular chains, opens the molecular chains, increases gaps among the molecular chains, facilitates easy entry of hardening liquid for subsequent curtain coating, and further improves the adhesive force.

In B, the strong solvent can open the polymer chains in the surface layer 102 well, which provides convenience for the medium and weak solvents to enter between the polymer chains, and thus can better complete the processing of the workpiece, such as swelling processing.

In C, the strong solvent has a strong volatility, and can volatilize relatively quickly in the whole process of opening the polymer chains in the surface layer 102, and the medium solvent can keep the opening state of the polymer chains in the surface layer 102, and then is matched with the volatilization action of the strong solvent, so that the sufficient weak solvent is filled between the polymer chains. When the medium solvent and the weak solvent are volatilized, the solvent with stronger volatility is low, and thus a large amount of time can be left for the polymer chains to curl, so that the polymer chains start to curl naturally at least in the weak solvent.

In step D, after all of the organic solvents such as the strong solvent, the medium solvent, and the weak solvent are volatilized, van der waals force and hydrogen bonds between polymer chains in the surface layer 102 are broken to be loosened, and the internal stress in the workpiece 100 is released. The molecular chains in the surface layer 102 re-interact while in a crimped state.

In some embodiments, the strong solvent may be methyl isobutyl ketone in a ketone organic solvent. In some embodiments, the medium solvent may be trimethylbenzene in a toluene-based organic solvent. In some embodiments, the weak solvent may be n-butanol in an alcoholic organic solvent. The methyl isobutyl ketone, the trimethylbenzene and the n-butyl alcohol respectively reduce the swelling capacity and the volatility of the high molecular polymer workpiece in sequence.

In some embodiments, the ratio of the weight parts of the ketone organic solvent, the toluene organic solvent and the alcohol organic solvent is 55-80: 2-8: 20-45.

In some embodiments, the ratio of the ketone organic solvent to the toluene organic solvent to the alcohol organic solvent is 67 parts by weight: 3: 30.

in some embodiments, the ratio of the ketone organic solvent, the toluene organic solvent and the alcohol organic solvent in parts by weight is 60-75: 4-6: 28-40.

In some embodiments, the weight ratio of the ketone organic solvent to the toluene organic solvent to the alcohol organic solvent is 63: 4: 35.

in some embodiments, referring to fig. 4, fig. 4 is a schematic flow chart illustrating a process for processing a surface of a workpiece according to another embodiment of the present disclosure. The workpiece may be a housing. Prior to step S0101, the method further comprises:

step S401: the shell is formed by injection molding of high molecular polymer.

Referring to fig. 5, fig. 5 is a schematic structural diagram of a housing according to an embodiment of the present disclosure. The housing 200 may include a body portion 10 and a boss portion 20 connected to each other. The body portion 10 has a first surface 11 and a second surface 12 disposed opposite to each other. The protrusion 20 may be disposed on the first surface 11 of the body portion 10. Specifically, the convex portion 20 is provided to protrude on one side of the first surface 11 of the main body portion 10.

Referring to fig. 6, fig. 6 is a schematic structural view of the housing 200 of fig. 5 in another embodiment. I.e. the edge of the body portion 10 is curved away from the first surface 11.

Step S101 may be to treat at least the surface of the convex portion with a volatile organic solvent.

The boss 20 is provided as part of the housing of the electronic device. Further, the electronic device casing is processed on, for example, the main body portion 10 and the convex portion 20.

In some embodiments, the shell 200 is thicker at the portion of the protruding portion 20, and thus has greater internal stress, so that the swelling process is performed on the protruding portion 20, and the effect is better. In one embodiment, after step S101, the electronic device housing, such as the main body 10, the surface of the protrusion 20, and the surface of the connection between the protrusion 20 and the main body 10, has microscopic holes formed by processing with an organic solvent mixture. Further, after step S102, a hardened layer is disposed on the surface having the micro holes to cover the micro holes.

In some embodiments, please refer to fig. 7, fig. 7 is a schematic flow chart illustrating a process for processing a surface of a workpiece according to another embodiment of the present disclosure. The workpiece may be a housing. Prior to step S0101, the method further comprises:

step S601: the shell is formed by compression injection molding of high molecular polymer.

Referring to fig. 8, fig. 8 is a schematic structural diagram of a housing according to an embodiment of the present application. The housing 200 may include a body portion 10 and a boss portion 20 connected to each other. The body portion 10 has a first surface 11 and a second surface 12 disposed opposite to each other. The convex portion 20 is provided on the first surface 11 of the main body portion 10. Specifically, the convex portion 20 is provided to protrude on one side of the first surface 11 of the main body portion 10.

Referring to fig. 9, fig. 9 is a schematic structural view of the housing 200 in the embodiment shown in fig. 8 in another embodiment. The edge of the main body portion 10 is curved to a side away from the first surface 11.

In some embodiments, referring to fig. 8 and 9, the main body 10 is provided with a blind hole 13 on the second surface 12. Specifically, the main body 10 is provided with a blind hole 13 on the second surface 12 at a position opposite to the convex portion 20. In some embodiments, blind hole 13 may extend into boss 20, but may be provided only in body portion 10. In some embodiments, blind hole 13 may be formed when housing 200 is compression injection molded. Referring to fig. 10 and 11, fig. 10 is a schematic structural diagram of a housing in an embodiment of the present application, and fig. 11 is a schematic structural diagram of the housing in the embodiment shown in fig. 10 in another embodiment. The protruding portion 20 may be provided with a camera hole 21 on a side surface away from the main body portion 10, and the camera hole 21 may communicate with the blind hole 13 to give way to the camera. In some embodiments, the camera hole 21 may be formed by punching after the housing is injection molded, or may be formed during the injection molding process, but may be formed in other manners. In some embodiments, the blind hole 13 may be omitted, and the camera hole 21 may be extended toward the second surface 12 side to penetrate the main body portion 10.

Referring to fig. 8, 9, 10, 11 and 12, fig. 12 is a schematic flow chart illustrating a process of processing a surface of the housing 200 according to an embodiment of the present disclosure. In step S101, at least the surface of the protrusion and the first surface of the main body are treated with a volatile organic solvent on the side of the first surface.

In some embodiments, the shell 200, such as the surface of the main body 10, the surface of the protrusion 20, and the surface of the connection between the protrusion 20 and the main body 10, has microscopic holes formed by treating with an organic solvent mixture.

In some embodiments, referring to fig. 12 and 13, fig. 13 is a schematic flow chart illustrating a process for machining a surface of a workpiece according to another embodiment of the present disclosure. After step S101 and before step S102, the method further comprises:

step S901: the treated surface was air dried.

Through air-drying, accelerate organic solvent's volatilization, reduce the influence of organic solvent to the hardening liquid, further promote the adhesive force of work piece, in some embodiments, can adopt plasma wind to air-dry.

In some embodiments, after step S901 and before step S102, the method further comprises:

step S902: and cleaning the treated surface.

In some embodiments, rinsing may be performed by curtain coating, spraying, or the like.

In some embodiments, after step S102, the product may be detected to eliminate defective products, so as to ensure the quality of the subsequent process.

In some embodiments, after step S102, a hardened layer is disposed on the surface to cover the microscopic holes.

Referring to fig. 14, 15 and 16, fig. 14 is a schematic surface view of a workpiece according to an embodiment of the present disclosure, fig. 15 is a schematic surface view of the workpiece after being processed according to an embodiment of the present disclosure, and fig. 16 is a schematic surface view of the workpiece after being coated with a hardening liquid to form a hardened layer according to an embodiment of the present disclosure. After the surface is treated by the organic solvent mixed solution, a microstructure such as microscopic holes are generated on the surface, and the microscopic holes can comprise dense island-shaped holes.

Microstructures such as dense island-shaped holes are used as a release source of internal stress, so that the internal stress is uniformly released on the whole surface, and the occurrence probability of cracking caused by the fact that the internal stress is concentrated at a certain point and is rapidly released is reduced; meanwhile, the microstructure such as the dense island-shaped holes improves the surface roughness and increases the surface energy, which is beneficial to increasing the embedment with the coating hardening liquid and increasing the adhesive force.

Referring to FIG. 15, the microstructure such as dense island-shaped holes has a diameter of 30-70 μm, a depth of 1 μm-4 μm, and a roughness of 0.268. Referring to fig. 16, after the liquid is sprayed and coated, the whole surface has a high brightness effect, the micro depth of the sprayed and coated surface is 0.3-0.4um, and the roughness is 0.299.

In some embodiments, the method may be applied to the protrusion 20 and the portion of the body portion 10 opposite the protrusion 20. I.e. the method acts on thicker parts of the housing 200.

In one embodiment, referring to fig. 9 and 10, the surface of the housing 200, such as the protrusion 20, is processed by step S101, such that the polymer chains in the housing 200, such as the protrusion 20, are opened and transformed into a natural curling state, and dense micro-pores are generated on the surface of the housing 200, such as the protrusion 20, and the release of the internal stress is completed. In step S102, the surface of the case 200, such as the protruding portion 20, is subjected to the shower coating with the hardening liquid, so that the hardening liquid can enter the microscopic holes, thereby effectively improving the adhesion between the case 200, such as the protruding portion 20, and the hardened layer, reducing the cracking probability of the case 200, such as the protruding portion 20, in step S102 and at the later stage, improving the adhesion between the case 200, such as the protruding portion 20, and the hardened layer, improving the yield of the shower coating hardening process, and expanding the design space of the boss structure.

In some embodiments, before step S102, the method further includes treating the surface of the high molecular polymer workpiece to form microstructures such as micro-holes and micro-textures on the surface of the high molecular polymer workpiece. In some embodiments, a chemical agent may be used to create microstructures, such as microscopic holes or rivet structures, on the surface of the high molecular polymer workpiece. Of course, a non-chemical intervention surface treatment process may be used instead of creating microstructures, such as micro holes or rivet structures, on the surface, such as a design scheme using a mold to form the microstructures, such as micro texture, for example, by machining the microstructures, such as micro texture, on the polymer workpiece by other means, such as laser engraving, rubbing, printing, etc., and it is understood that the microstructures may include micro holes or rivet structures.

Next, an electronic device that can use the case 200 in the above embodiment and can also use the case prepared by the method in the above embodiment will be described. The electronic device may be any one of a number of electronic devices including, but not limited to, cellular phones, smart phones, other wireless communication devices, personal digital assistants, audio players, other media players, music recorders, video recorders, cameras, other media recorders, radios, medical devices, calculators, programmable remote controllers, pagers, netbook computers, Personal Digital Assistants (PDAs), Portable Multimedia Players (PMPs), moving picture experts group (MPEG-1 or MPEG-2), audio layer 3(MP3) players, portable medical devices, and digital cameras and combinations thereof.

In some embodiments, the electronic device may include, but is not limited to, an electronic device having a communication function, such as a mobile phone, a tablet computer, a notebook computer, a wearable device, an internet device (MID), an electronic book, a Portable Player Station (PSP), or a Personal Digital Assistant (PDA).

Referring to fig. 17, fig. 17 is a schematic structural diagram of an electronic device 300 according to an embodiment of the present application. The electronic device 300 may include the housing 200, the middle frame 30 connected to the housing 200, the camera 40 installed in the installation space formed by the housing 200 and the middle frame 30, and the display screen 50 disposed on the side of the middle frame 30 away from the housing 200 in the above embodiments. Wherein, the camera hole 21 can be communicated with the installation space, so that the light can be incident into the camera 40 through the camera hole 21. The display screen 50 may be fixed on the middle frame 30 by means of fastening, bonding, etc., and the camera 40 may be installed in the installation space and matched with the housing 200, and disposed opposite to the camera hole 21 to be used as a rear camera. In some embodiments, the camera 40 is mounted between the housing 200 and the display screen 50 and is at least partially disposed within the blind hole 13 for capturing light through the camera hole 21. Of course, the blind hole 13 may be omitted, and the camera hole 21 directly communicates with the installation space. In some embodiments, the housing 200 and the middle frame 30 can be snap-fit connected. It is understood that the electronic device 300 may further include other structures disposed in the installation space, such as a circuit board (on which a control unit, e.g., a processor and the like, is disposed), a battery, a sensor and other electronic components. And will not be described in detail herein.

In the several embodiments provided in the present application, it should be understood that the disclosed apparatus may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, a division of modules or units is merely a logical division, and an actual implementation may have another division, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed.

Units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The above description is only an example of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes performed by the present application and the contents of the appended drawings, which are directly or indirectly applied to other related technical fields, are also included in the scope of the present application.

Claims (16)

1. A method of machining a surface of a workpiece, comprising:

treating the surface of a high molecular polymer workpiece by using an organic solvent mixed solution to open molecular chains on the surface layer of the high molecular polymer workpiece, wherein the organic solvent mixed solution comprises a plurality of organic solvents which have different volatilities and can realize swelling of the high molecular polymer workpiece to different degrees;

and spraying a hardening liquid on the treated surface, and curing the hardening liquid to form a hardened layer.

2. The method of claim 1, wherein the plurality of organic solvents are arranged in an order in which the swelling capacity of the high molecular polymer workpiece decreases in order, and the plurality of organic solvents have a decreasing volatility in the order of arrangement.

3. The method of claim 1, wherein the plurality of organic solvents comprises a first organic solvent, a second organic solvent, and a third organic solvent, and the first organic solvent, the second organic solvent, and the third organic solvent sequentially decrease swelling capacity and volatility of the high molecular polymer workpiece.

4. The method of claim 1, wherein the treating the surface of the polymer workpiece with the organic solvent mixture comprises:

and treating the surface of the high molecular polymer workpiece by using the plurality of organic solvents so as to open molecular chains on the surface layer of the high molecular polymer workpiece and form microscopic holes on the surface of the high molecular polymer workpiece.

5. The method of claim 1, wherein prior to curtain coating a hardening fluid on the treated surface, the method further comprises:

and processing the surface of the high molecular polymer workpiece to form microscopic holes on the surface of the high molecular polymer workpiece.

6. The method of claim 5, wherein treating the surface of the high molecular polymer workpiece comprises:

and processing the surface of the high molecular polymer workpiece by adopting a non-chemical reagent intervention surface processing technology so as to form microscopic holes on the surface of the high molecular polymer workpiece.

7. The method of claim 1, wherein the plurality of organic solvents comprise a ketone organic solvent, a toluene organic solvent, and an alcohol organic solvent, and the ketone organic solvent, the toluene organic solvent, and the alcohol organic solvent sequentially decrease swelling capacity and volatility of the high molecular polymer workpiece.

8. The method of claim 7, wherein the ketone organic solvent comprises methyl isobutyl ketone, the toluene organic solvent comprises trimethylbenzene, and the alcohol organic solvent comprises n-butanol.

9. The method according to claim 7, wherein the weight ratio of the ketone organic solvent to the toluene organic solvent to the alcohol organic solvent is 55-80: 2-8: 20-45.

10. The method according to claim 9, wherein the weight ratio of the ketone organic solvent to the toluene organic solvent to the alcohol organic solvent is 67: 3: 30.

11. the method of claim 1, wherein before the treating the surface of the polymer workpiece with the organic solvent mixture, the method comprises:

the shell is formed by injection molding of high molecular polymer and comprises a main body part and a bulge part which are connected with each other, wherein the bulge part is arranged on one side of the main body part in a protruding manner;

the treatment of the surface of the high molecular polymer workpiece by using the organic solvent mixed solution comprises the following steps:

at least the surface of the projection is treated with the organic solvent mixture.

12. The method according to claim 1, further comprising, before the curtain coating of the hardening liquid on the surface after the treatment:

air drying the treated surface.

13. The method of claim 1, further comprising:

and manufacturing an appearance membrane on the hardened layer.

14. A housing, comprising:

the device comprises a main body part and a bulge part, wherein the bulge part is connected with each other, the bulge part is arranged on one side of the main body part in a protruding mode, the surface of the bulge part or the surface of the joint of the bulge part and the main body part is configured to be treated by organic solvent mixed liquid, a high polymer molecular chain on the surface layer is opened, and the organic solvent mixed liquid comprises a plurality of organic solvents which have different volatility and can realize different degrees of swelling on a high polymer workpiece; and

and a hardened layer provided at least on the surface treated with the organic solvent mixed solution.

15. The housing of claim 14, further comprising:

and the appearance membrane is arranged on the hardening layer.

16. An electronic device, comprising:

the housing according to any one of claims 14 to 15, wherein the projection is provided with a camera hole; and

the middle frame is connected with the shell to form an installation space communicated with the camera shooting hole;

the display screen is arranged on one side, far away from the shell, of the middle frame; and

and the camera is arranged in the installation space and is opposite to the camera shooting hole.

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