TW201532835A - Surface treatment method of casing and casing made with the method - Google Patents

Abstract

A surface treatment method of a casing comprises the following steps: preparing a casing having a three-dimensional surface; forming an adhesive layer on at least a portion of the surface of the casing; setting a plurality of beads on the adhesive layer, wherein each bead has a 0-50% portion of the diameter thereof exposed outside the adhesive layer; and curing the adhesive layer to enable the beads to be fixedly bonded to the surface of the casing. The beads are made of a material selected from the group consisting of ceramic material, metallic material, and a combination thereof. Each of the beads has an average diameter of 30 to 150 [mu]m. The adhesive layer is formed by spraying, dispensing, or three-dimension overlay method.

Description

Surface treatment method of shell member and shell member made by the method

The present invention relates to a surface treatment method, and more particularly to a surface treatment method for a shell member and a shell member produced by the method.

Existing electronic information products, especially portable electronic information products, have also become a personal fashion accessory, so the appearance of the product has become one of the key considerations for consumer purchase.

In addition to the design of the overall shape of the casing itself, the visual and tactile sensations of the surface of the casing are also the main factors affecting consumer preferences. The outer casing of a general electronic information product is usually made of a plastic, metal or fiber composite material, and the outer surface of the outer casing is painted to change color, protect the outer casing or form a pattern. However, the surface lacquer layer is easily scratched or peeled off, causing the lacquer layer to peel off and affect the appearance after a period of use.

In order to increase the scratch resistance and decorative effect of the outer surface of the outer casing, a technique of forming a surface layer by using glass particles has been developed, and the purpose of scratch resistance, abrasion resistance and decoration is achieved by the preferable hardness of the glass particles and the color of the glass particles themselves. For example, U.S. Patent Publication No. US 20130273295 discloses a method for forming a surface layer on a composite board, mainly using upper and lower molds, which will serve as The polymer film of the surface layer is placed in the upper mold, and the composite plate is placed in the lower mold, wherein the polymer film is embedded with glass particles, and the upper and lower molds are combined to form a mold between the polymer film and the composite plate. The cavity is reheated and the resin is injected into the cavity to bond the polymer film to the composite sheet.

The foregoing process is a product manufactured by using a mold and an injection molding machine, and the manufacturing cost thereof is high, and the glass particles are required to be formed into a film with the polymer film, and the process is complicated.

Accordingly, it is an object of the present invention to provide a surface treatment method for a shell member which is simple in manufacturing process and low in cost.

Another object of the present invention is to provide a shell member having a surface layer containing patterned beads.

Therefore, the surface treatment method of the shell member of the present invention comprises the steps of: preparing a shell having a three-dimensional surface; forming an adhesive layer on at least a portion of the surface of the shell; and laying a plurality of beads on the adhesive layer, and Each of the beads has a portion having a diameter of 0 to 50% exposed outside the adhesive layer; and the adhesive layer is cured to cause the beads to be fixedly adhered to the surface of the casing.

The shell member manufactured by the invention comprises: a shell, an adhesive layer and a plurality of beads. The adhesive layer is affixed to at least a portion of the surface of the housing. The beads have an average particle diameter of 30 to 150 μm, are disposed in the adhesive layer, and each of the beads has a portion having a diameter of 0 to 50% exposed outside the adhesive layer.

The effect of the invention, the surface treatment method of the shell member of the invention is straight After the adhesive layer is formed on the surface of the casing, the beads are disposed, and then the adhesive layer is solidified, thereby completing the manufacture of the shell member, the manufacturing process is simple, and the manufacturing cost can be reduced. Furthermore, the use of a spray coating to form an adhesive layer can also use a leather lacquer, which not only has an adhesive function, but also makes the surface feel softer.

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1‧‧‧shell

11‧‧‧ surface

2‧‧‧Adhesive layer

2'‧‧‧ Thermoplastic film

3‧‧‧ beads

4‧‧‧ mask

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6‧‧‧ release substrate

71‧‧‧Drive platform

72‧‧‧Painting machine

73‧‧‧Drive platform

74‧‧‧dump

8‧‧‧ spray gun

9‧‧‧ fixture

91‧‧‧ shaft

10‧‧‧Shell

Other features and effects of the present invention will be apparent from the following description of the drawings. FIG. 1 is a block diagram showing the flow of the steps of the first preferred embodiment of the surface treatment method of the present invention. 2 is a schematic flow chart showing the steps of the first preferred embodiment; FIG. 3 is a schematic view showing the spraying step of the first preferred embodiment; and FIG. 4 is a schematic flow chart showing the surface treatment of the shell member of the present invention; The steps of the second preferred embodiment of the method; FIG. 5 is a block diagram showing the flow of the steps of the third preferred embodiment of the surface treatment method of the shell member of the present invention; FIG. 6 is a schematic flow chart showing the third preferred embodiment. FIG. 7 is a schematic view showing a step of setting a bead according to a fourth preferred embodiment of the surface treatment method of the shell member of the present invention; and FIG. 8 is a schematic view showing a fifth aspect of the surface treatment method of the shell member of the present invention. The bead step of the preferred embodiment; and FIG. 9 is a schematic view of the bead setting step of the sixth preferred embodiment of the surface treatment method of the case member of the present invention.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same reference numerals.

Referring to FIG. 1 and FIG. 2, the steps of the first preferred embodiment of the surface treatment method for the shell member of the present invention include:

In step 101, a housing 1 having a three-dimensional surface 11 is prepared. The housing 1 can be made of a plastic, metal or fiber composite material.

Step 102, cleaning the surface 11 of the casing 1, the surface 11 of the casing 1 may be cleaned by ultrasonic or plasma treatment, etc. to prevent surface impurities from forming defects in subsequent processes, thereby affecting product yield (this is omitted in FIG. 2) step).

Step 103, forming an adhesive layer 2 on at least a portion of the surface 11 of the casing 1. The adhesive layer 2 may be made of acrylic UV glue, silicone-based UV glue, soft touch paint, or case hardened. In the present embodiment, the adhesive layer 2 is formed of a leather paint and sprayed on the surface 11 of the casing 1 during the spraying process, and in the spraying process, referring to FIG. 3, the casing 1 is used. The jig 9 which is rotatable about the rotating shaft 91 is held and rotatable relative to the plurality of spray guns 8 (see FIG. 3). In particular, the plurality of spray guns 8 can face the plane and the curved surface of the casing 1 respectively, so as to make an adhesive (leather paint). Evenly sprayed on various areas of the surface 11 of the casing 1 that are not coplanar, that is, a uniform adhesive layer 2 can be formed on the three-dimensional surface 11. The thickness of the adhesive layer 2 is preferably from 15 to 150 μm, and is about 50 μm in the present embodiment. Further, the diameter of the spray gun 8 is from 0.5 to 2 mm, the spray air pressure is from 0.15 to 0.35 MPa, and the air usage is about 50. Up to 300mL/min, spray distance between 150 and 350mm, and spray width between 100 and 250mm, up to better spray Paint effect.

Step 104, the beads 3 made of a ceramic material having an average particle diameter of 30 to 150 μm are densely disposed on the adhesive layer 2, and each of the beads 3 has a portion having a diameter of 0 to 50% exposing the adhesive layer 2, So that the beads 3 do not easily come out of the adhesive layer 2. The ceramic material comprises crystalline ceramics and amorphous ceramics (i.e., glass), and "densely disposed" means that the beads 3 have no voids and then accommodate other beads 3, which are the closest arrangement. In the present embodiment, the beads 3 are made of glass and have an average particle diameter of about 75 μm, and the beads 3 are also sprayed on the adhesive layer 2. In this step, the adhesive layer 2 is not yet solidified, and the beads 3 are pressurized and ejected by the spray gun 8 (refer to FIG. 3, not shown) to be injected into the adhesive layer 2, and temporarily adhered by the adhesive layer 2 Will fall off. Similarly, during the spraying process, the housing 1 is held by a jig 9 (refer to FIG. 3, not separately illustrated) rotatable about the rotating shaft 91 and rotatable relative to the plurality of lances 8, in particular, the plurality of lances 8 can be respectively opposed The plane and the curved surface of the casing 1 are such that the beads 3 are uniformly sprayed on the respective regions of the casing 1 which are not coplanar, that is, the beads 3 can be uniformly disposed on the three-dimensional surface 11, wherein the spray air pressure is controlled to be less than 0.25 MPa to avoid The excessive force of the beads 3 colliding with the adhesive layer 2 causes damage to the casing 1, and the air pressure is controlled to be 0.05 MPa or more to allow the beads 3 to have sufficient force to penetrate the adhesive layer 2. In addition, the spray gun 8 may have a diameter of 0.5 to 2 mm, an air usage of about 20 to 250 mL/min, an injection distance of 150 to 350 mm, and a spray width of between 50 and 200 mm for a better spray effect.

Step 105, curing the adhesive layer 2, and the beads 3 are fixedly adhered to the surface 11 of the casing 1. The curing manner depends on the material of the adhesive layer 2 used, and may be cured by heating or cured by UV light, in this embodiment. ,leather The lacquer is cured by UV light, and the beads 3 can be permanently fixed after the adhesive layer 2 is cured. Thus, the shell member 10 having the surface 11 densely coated with the ceramic beads 3 is formed, that is, the shell member 10 comprises a casing 1, an adhesive layer 2 fixed to the surface 11 of the casing 1, and densely disposed in the adhesive layer 2. Ceramic beads 3. By adhering the ceramic beads 3 to the surface 11, not only the scratch-resistant and anti-wear properties can be improved, but also the decorativeness can be increased. Furthermore, the adhesive layer 2 of the present embodiment can not only have an adhesive function but also a soft touch on the surface. In the present embodiment, the adhesive layer 2 is a leather lacquer, but not limited thereto, and the material used for the adhesive layer 2 is such that the beads 3 can adhere to the casing 1. In the present embodiment, the beads 3 are ceramic beads, but not limited thereto, the beads 3 may be selected from the following materials: ceramic materials, metal materials, or a composite material of the two, wherein the metal ceramics The composite material beads 3 can be made to have a metal luster in addition to the better wear resistance of the shell member 10, so that the shell member 10 has a better decorative appearance.

Referring to FIG. 1 and FIG. 4, the second preferred embodiment of the surface treatment method of the present invention is substantially the same as the first preferred embodiment. However, in the second preferred embodiment, the adhesive layer 2 is a point. A dispensing method is formed on the surface 11 of the casing 1 and can be selectively dispensed to a specific area, and a mask 4 is provided in the undispensed area to avoid direct impact on the surface 11 of the casing 1 when the beads 3 are subsequently disposed. damage. After the bead 3 is set, the mask 4 is removed, and then the adhesive layer 2 is cured to obtain the shell member 10. Thereby, the surface 11 of the shell member 10 is distributed by the beads 3 into a specific pattern to further enhance the decorative effect.

Please refer to FIG. 5 and FIG. 6 for the surface treatment of the shell member of the present invention. The third preferred embodiment of the method comprises:

In step 501, a housing 1 having a three-dimensional surface 11 is prepared. The housing 1 can be made of a plastic, metal or fiber composite.

Step 502, cleaning the surface 11 of the housing 1, the surface 11 of the housing 1 can be cleaned by ultrasonic or plasma treatment, etc. to prevent surface impurities from forming defects in subsequent processes, thereby affecting product yield (Fig. 6 does not depict Show this step).

Step 503, forming a thermoplastic film 2' on the surface 11 of the casing 1 for use in the subsequent step as the adhesive layer 2. The thermoplastic film 2' may be specifically made of the following materials, such as thermoplastic polyurethane (Thermoplastic) Polyurethane (TPU) or Ethylene Vinyl Acetate (EVA), etc., wherein the thermoplastic film 2' is formed on the surface 11 of the casing 1 by a three dimension overlay method (TOM). The detailed steps include: placing the casing 1 and the thermoplastic film 2' into a vacuum device (not shown), heating and softening the thermoplastic film 2' in a vacuum environment, and coating the thermoplastic film 2' by the pressure of the vacuum. Adhered to the surface 11 of the housing 1.

In step 504, the beads 3 are placed on the thermoplastic film 2' of the casing 1. The detailed steps include: temporarily adhering the beads 3 to a release substrate 6 and coating the release substrate 6 together with the beads 3 on the above-mentioned housing 1 having the thermoplastic film 2', and making the beads 3 faces the thermoplastic film 2'. The release substrate 6 used in this embodiment is also made of a thermoplastic plastic material, but its adhesion to the beads 3 is inferior to that of the thermoplastic film 2'.

Step 505, curing the adhesive layer 2 and fixing the beads 3 to adhere On the surface 11 of the housing 1. The detailed steps include: softening the thermoplastic film 2' and the release substrate 6 by heating in a vacuum heating environment, at which time the thermoplastic film 2' becomes the adhesive layer 2, and then by vacuum The release substrate 6 is subjected to a pressure, and after the release substrate 6 is pressed, the beads 3 are pressed, and the beads 3 are pressed into the adhesive layer 2. Since the adhesion of the beads 3 to the adhesive layer 2 is greater than the adhesion of the beads 3 to the release substrate 6, when the adhesive layer 2 is cooled and solidified, the release substrate 6 can be easily removed at room temperature. And the beads 3 are fixedly adhered to the surface of the casing 1.

Referring to Figure 7, a fourth preferred embodiment of the surface treatment method for a shell member of the present invention is substantially the same as the first preferred embodiment. However, in the fourth preferred embodiment, the step of arranging the beads 3 is carried out. The casing 1 on which the adhesive layer 2 has been formed is placed on the transmission platform 71 by a curtain coating method, so that the casing 1 passes under the curtain coating machine 72, and the beads 3 flow out in a continuous curtain. Dropped in the adhesive layer 2, when the casing 1 completely passes under the coating machine 72, the setting of the beads 3 is completed.

Referring to FIG. 8, a fifth preferred embodiment of the surface treatment method for a shell member of the present invention is substantially the same as the first preferred embodiment. However, in the fifth preferred embodiment, the step of arranging the beads 3 is provided. The casing 1 on which the adhesive layer 2 has been formed is placed on the transmission platform 73 by means of a pouring method, so that the casing 1 passes under the dip port 74, and the beads 3 are discharged from the dip port 74 and fall into the adhesive layer 2, When the housing 1 is completely passed under the dip port 74, the placement of the beads 3 is completed.

Referring to FIG. 9, a sixth preferred embodiment of the surface treatment method for a shell member of the present invention is substantially the same as the first preferred embodiment. However, in the sixth preferred embodiment, the step of arranging the beads 3 is performed by using a transposition method, in which the patterned beads 3 are temporarily adhered to a release substrate 6, and the release substrate 6 is oppositely patterned. The adhesive layer 2 is bonded to transfer the beads 3 temporarily adhered to the release substrate 6 to the patterned adhesive layer 2, whereby the patterned array of beads 3 can be accurately adhered to the casing 1 Up and without causing damage to the surface 11. Moreover, the release substrate 6 used in the embodiment is a three-dimensional plate material and has a certain rigidity, and the bead 3 can be accurately adhered to the patterned adhesive layer 2 by such material characteristics.

In summary, the surface treatment method of the shell member of the present invention directly forms the adhesive layer 2 on the surface 11 of the casing 1 and then lays the beads 3, and then cures the adhesive layer 2, thereby completing the fabrication of the shell member 10, and the manufacturing process is simple and Can reduce manufacturing costs. Further, by forming the adhesive layer 2 by spraying, leather lacquer can also be used, which not only has an adhesive function but also makes the surface feel softer, so that the object of the present invention can be achieved.

The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, that is, the simple equivalent changes and modifications made by the patent application scope and patent specification content of the present invention, All remain within the scope of the invention patent.

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Claims (13)

A surface treatment method for a shell member, comprising the steps of: preparing a shell having a three-dimensional surface; forming an adhesive layer on at least a portion of the surface of the shell; and arranging a plurality of beads on the adhesive layer, and each of the The bead has a portion having a diameter of 0 to 50% exposed outside the adhesive layer; and the adhesive layer is cured to cause the beads to be fixedly adhered to the surface. The surface treatment method of the shell member according to claim 1, wherein the beads are selected from the group consisting of ceramic materials, metal materials, or a composite material of the two. The surface treatment method of the shell member according to claim 1, wherein the beads have an average particle diameter of from 30 to 150 μm . The surface treatment method of the shell member according to claim 1, wherein the adhesive layer is formed by a spraying method, a dispensing method, or a three-dimensional mold decorating technique (TOM). The surface treatment method of the shell member according to claim 4, wherein the adhesive layer is formed on the surface in a dispensing manner, and a mask can be disposed in the undispersed region to select dispensing to a specific region. The surface treatment method of the shell member according to claim 4, wherein the adhesive layer is formed on the surface by a three-dimensional mold decoration technique (TOM), and the step includes placing the shell and a thermoplastic film into a vacuum device. And heating and softening the thermoplastic film under a vacuum environment and coating the thermoplastic film on the surface. The surface treatment method of the shell member according to claim 1, wherein the beads are The particles are disposed on the adhesive layer in a transposed manner, wherein the beads are temporarily adhered to a release substrate, and the release substrate is bonded to the adhesive layer to temporarily adhere to the release substrate. The beads on the material are transferred to the adhesive layer. The surface treatment method of the shell member according to claim 1, wherein the beads are sprayed on the adhesive layer, and a plurality of spray guns are used during spraying and the shell is rotated to spray the surface on the surface. Each zone is controlled to have a spray air pressure of between 0.05 and 0.25 MPa and an injection distance of between 150 and 350 mm. The surface treatment method of the shell member according to claim 1, wherein the adhesive layer is made of a soft touch paint. A shell member comprising: a casing; an adhesive layer fixed to at least a portion of the surface of the casing; and a plurality of beads disposed in the adhesive layer, and each of the beads having a diameter of 0 to 50 A portion of % is exposed outside the adhesive layer. The shell member according to claim 10, wherein the adhesive layer is made of a soft touch paint. The shell member of claim 10, wherein the beads are selected from the group consisting of ceramic materials, metallic materials, or a composite of the two. The shell member of claim 10, wherein the beads have an average particle size of from 30 to 150 μm .