TWI406715B - Method for producing housing - Google Patents

Abstract

The present invention relates to a method for producing a housing including: providing a transparent housing including an inner surface and an outer surface opposed to the inner surface. Printing ink on the inner surface to form a frame and a window area in the frame. Covering the frame and a window area. Painting on the inner surface. Providing a NCVM process on the outer surface. Manufacture by the method to form the housing can avoid overflow, and enhance the housing appearance quality.

Description

Manufacturing method of housing

The present invention relates to a method of manufacturing a housing, and more particularly to a method of manufacturing a housing for an electronic device.

With the rapid development of information technology, portable electronic devices such as mobile phones, PDAs (Personal Digital Assistants) and notebook computers are becoming more and more popular. The appearance and aesthetics of these electronic device casings are also increasing. More and more attention and attention. In the prior art, a plastic material is often used as an electronic product casing. In order to improve the appearance of the electronic product casing and make the surface of the casing various in color, a paint layer is often used to form a paint layer on the surface of the electronic product casing, so that the electronic product has Good appearance quality. However, the paint layer formed on the surface of the shell by spraying the paint has poor abrasion resistance, is easy to wear and peel off, and loses luster texture. In addition, during the spraying process, it is easy to produce paint smear on the edge of the casing and the window, which affects the appearance of the product and does not meet the requirements of the consumer for the appearance of the product.

In order to make the surface of the casing have a glossy texture without spraying paint, the conventional electronic device housing directly uses a metal material instead of the plastic material. However, metal materials are expensive and have a negative impact on antenna performance.

In view of the above, it is necessary to provide a method of manufacturing a casing which has a glossy texture and is less prone to paint smear.

A method of manufacturing a housing, comprising the steps of: Providing a transparent casing comprising an inner surface and an outer surface opposite the inner surface, the casing having an opening; printing ink on the inner surface of the casing to form a frame-shaped ink zone and located at the a window region in the frame-shaped ink region; shielding the window region of the inner surface of the casing and the frame-shaped ink region, and masking the edge of the opening of the outer surface of the casing with adhesive tape; The unshielded area of the inner surface is painted; the outer surface of the casing is subjected to a non-conductive vacuum plating metallization process.

By the method, the housing of the electronic product is manufactured to avoid the occurrence of overflow paint during the baking of the paint, so that the window area of the casing is covered with the paint body and the use of the electronic product is affected. At the same time, the outer surface of the casing is coated by NCVM technology, so that the appearance of the electronic product has a metallic texture and does not adversely affect the antenna performance.

10‧‧‧ inner surface

20‧‧‧ outer surface

30‧‧‧ openings

40‧‧‧Transparent window area

50‧‧‧Ink area

60‧‧‧ adhesive tape

100‧‧‧shell

1 is a perspective view of a prefabricated casing according to a preferred embodiment of the present invention; FIG. 2 is a perspective view of a casing after printing according to a preferred embodiment of the present invention; BRIEF DESCRIPTION OF THE DRAWINGS FIG. 4 is a schematic view showing the masking of the adhesive tape at the opening of the casing according to a preferred embodiment of the present invention.

The manufacturing method of the casing of the preferred embodiment of the present invention is described by taking a manufacturing of a mobile phone casing as an example. The manufacturing method includes the following steps: Referring to FIG. 1, a transparent pre-manufactured mobile phone casing 100 The housing 100 includes an inner surface 10 and an outer surface 20 opposite the inner surface 10, and the housing 100 corresponds to a mobile phone keypad The opening is provided in the domain. The preferred embodiment of the housing 100 is processed by an injection molding machine by injecting a transparent plastic material such as PMMA (polymethylmethacrylate) into an injection molding machine, cooling the injection molding machine, and then opening the mold and taking out the mold. A transparent pre-fabricated mobile phone housing 100 is formed.

Referring to FIG. 2, the inner surface of the housing 100 is printed after the molding of the housing 100 is completed to determine the transparent window region 40 of the mobile phone. The preferred embodiment of the present invention adopts a pad printing technology, the process of which is: firstly, a pad printing machine is provided, the pad printing machine comprises a rubber head disposed on the bottom of the embossing rod and a steel mold, wherein the steel mold is concavely provided with a rectangle The frame is filled with ink. The rubber head is pressed against the steel mold by the embossing rod, so that the ink area 50 of the rectangular frame on the steel mold is absorbed on the rubber head. The adhesive head is then lifted by the embossing rod and moved over the inner surface 10 of the prefabricated housing 100, and then pressed down to transfer the ink zone 50 onto the inner surface 10 of the housing 100 for the shell A transparent window region 40 is defined on the inner surface 10 of the body 100. Each of the ink zones 50 has a certain width.

Referring to FIG. 3 and FIG. 4 together, the window region 40 and the ink region 50 of the inner surface 10 of the casing 100 are shielded by the adhesive tape 60, and the edge of the opening 30 of the outer surface 20 of the casing 100 is shielded.

Next, the inner surface 10 of the casing 100 is subjected to a baking finish. The baking process fixes the housing 100 to the upper fixture, such that the inner surface 10 of the housing 100 needs to be painted opposite the spray gun, and the paint body sprays the paint body to cover the inner surface 10 of the housing 100 with a paint layer. Since the adhesive tape 60 shields the ink zone 50 having a certain width, the edge of the opening 30 of the outer surface 20 of the casing 100 is shielded. If the lacquer phenomenon occurs at the edge of the bonding of the adhesive tape 60 and the ink zone 50 during the baking process, since the ink zone 50 has a certain width, the lacquer liquid can be prevented from overflowing in the transparent window region 40. In addition, the edge of the opening 30 of the outer surface 20 is covered by the adhesive tape 60, so that even if the paint liquid flows onto the outer surface 20 during the baking process, the outer surface 20 can be prevented from being covered by the paint liquid.

The housing 100 is then removed from the upper fixture and will cover the window region 40 and the outer surface of the housing 100. 20 The adhesive tape 60 at the edge of the opening 30 is removed.

Finally, the outer surface 20 of the casing 100 is subjected to NCVM (Non conductive vacuum metallization) technology to form a non-metallic coating having a metallic luster on the outer surface 20 of the casing 100.

The housing of the electronic product is manufactured by the method to avoid the occurrence of paint varnish during baking, and the housing is more beautiful. At the same time, the outer surface of the casing is coated by NCVM technology, so that the appearance of the electronic product has a metallic texture and does not adversely affect the antenna performance.

It can be understood that if the mobile phone casing can also remove the opening, the step of shielding the opening can be omitted.

In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited to the above-described embodiments, and equivalent modifications or variations made by those skilled in the art in light of the spirit of the present invention are It should be covered by the following patent application.

20‧‧‧ outer surface

50‧‧‧Ink area

60‧‧‧ adhesive tape

Claims (4)

A method of manufacturing a casing, comprising the steps of: providing a transparent casing comprising an inner surface and an outer surface opposite the inner surface, the casing having an opening; and printing the inner surface of the casing Ink, thereby forming a frame-shaped ink region and a window region located in the frame-shaped ink region; shielding the window region of the inner surface of the casing and the frame-shaped ink region, and using adhesive tape to the outer surface of the casing The edge of the opening is shielded; the unmasked area of the inner surface of the casing is painted; and the outer surface of the casing is subjected to a non-conductive vacuum plating metallization process. The method of manufacturing a casing according to claim 1, wherein the printing of the frame-shaped ink zone of the inner surface is performed by a pad printing technique. The method of manufacturing a casing according to claim 2, wherein the window area of the inner surface is shielded by adhesive tape. The method of manufacturing a casing according to claim 3, wherein the casing is made of an acrylic material.