TWI628994B - Electronic product housing molding electrical conduction contact manufacturing method - Google Patents

Abstract

The invention discloses a method for manufacturing an electrical conduction contact of an electronic product casing, which is to plan a local position of the inner side of the casing of the electronic product as a contact forming zone; and integrally coating the water-soluble low temperature on the inner side surface of the casing and the joint forming zone; Hardening or high temperature hardening peelable film, then drying and setting; removing the peelable film on the surface of the joint forming area of the shell by laser beam; continuing to process the surface of the joint forming area into a rough surface by laser beam The molten metal is blown by a pressurized gas to form metal particles by a normal temperature air pressure spraying method, and the metal particles are sprayed and fixed on the rough surface to form a metal spray coating layer, and the metal spray coating layer is instantly cooled to become electrically conductive. Finally, the peelable adhesive film on the inner side of the casing is peeled off; thus, the manufacturing method of forming the electrical conductive contact in the electronic product casing can improve the joint bonding force and the fineness, improve the manufacturing efficiency, and meet the environmental protection. The specification and the cost associated with the mask for the housing can be omitted, saving manpower, material and man-hours, and reducing costs.

Description

Electronic product housing molding electrical conduction contact manufacturing method

The invention relates to a method for manufacturing an electrical conductive contact for forming an electronic product casing, in particular to a manufacturing method for forming a mechanical conductive contact of a smart mobile device, a personal digital assistant, a mobile phone and the like.

According to the current intelligent electronic devices, personal digital assistants, mobile phones, etc., most of them use plastic materials or magnesium-aluminum alloy as the outer casing, and the inner and outer surfaces of the plastic outer casing can be covered with an anodized layer. To improve the aesthetics.

At present, most of the outer casings of electronic products are provided with a plurality of copper-plated gold-plated contacts on the inner surface to turn on related electronic circuits and electronic components inside the electronic products. However, most of the copper-plated gold-plated contacts are laser-bonded to the rough surface of the outer casing one by one, which is not only slow in processing speed, but also wastes manpower, material resources and man-hours.

Therefore, the inventors previously used a normal temperature air pressure spraying method to melt the sprayed metal on the inner surface of the outer casing of the electronic product to form an electrical conduction contact. When performing the air-spraying and spraying of the metal particles, it is necessary to install a shielding jig on the non-processing area on the surface of the outer casing of the electronic product to prevent the metal particles from being sprayed and fixed on the surface of the non-processing area. However, it is inconvenient to make, assemble, and disassemble the masking jig, wasting manpower, material resources and working hours. . Therefore, how to solve the above problems is the subject of research that the relevant industry players are eager to study.

The main object of the present invention is to use a low-temperature hardening or high-temperature hardening type peelable film to spray the non-processing area shielded on the inner side of the electronic product casing, and then perform the roughening of the contact forming area with the laser, and then perform the spray coating. The metal is consolidated to form an electrical conduction contact, which can improve the bonding force and the fineness of the joint, improve the manufacturing efficiency, meet the environmental protection regulations, and omit the cost associated with the shielding fixture required for the conventional housing, saving manpower and material resources. And working hours, but to reduce costs.

In order to achieve the above object, the electronic product housing forming electrical conduction contact manufacturing method of the present invention comprises the following steps: (a) planning the local position of the inner side of the electronic product housing as a contact forming area; (b) The inner side surface of the body and the joint forming area are integrally coated with a low-temperature hardening or high-temperature hardening type peelable adhesive film, and then dried and shaped; (c) the laser beam is removed to remove the surface of the joint forming region of the shell. (d) continuing to process the surface of the contact forming region into a rough surface by a laser beam; (e) blowing a molten metal to form a metal particle by a normal temperature air pressure spraying method, and spraying the metal particle on the metal particle A molten metal spray coating layer is formed on the rough surface of the joint forming region, and the metal spray spray coating layer is instantly cooled to become an electrical conductive contact; (f) the peelable adhesive film on the inner side surface of the casing is peeled off.

The above-mentioned electronic product casing molding electrical conduction contact manufacturing method, wherein the casing in the step (a) is a metal body, a carbon dioxide laser is used in the step (c), and red light is used in the (d) step. Laser.

The above-mentioned electronic product housing molding electrical conduction contact manufacturing method, wherein the housing in the step (a) is a plastic body, a carbon dioxide laser is used in the step (c), and red light is used in the (d) step. Laser.

The foregoing electronic product housing molding electrical conduction contact manufacturing method, wherein the housing in the (a) step is a glass body, a carbon dioxide laser is used in the step (c), and a violet laser is used in the (d) step. .

The above electronic product housing molding electrical conduction contact manufacturing method, wherein the housing in the (a) step is a ceramic body, the carbon dioxide laser is used in the step (c), and the step (d) is used sequentially. Red laser, green laser.

In the above method for manufacturing an electrical contact of an electronic product casing, the casing in the step (a) is a plastic body, a glass body or a ceramic body, and an inner side surface of the casing is an anodized layer.

The above-mentioned electronic product casing molding electrical conduction contact manufacturing method, wherein the peelable adhesive film component in the step (b) comprises propane trimethyl methacrylate, polyacrylic acid, polypropylene glycol monobutyl ether, water And the temperature required for drying and setting is 45 to 65 degrees Celsius.

The method for manufacturing an electrical continuity contact of the electronic product casing, wherein the peelable film in the step (b) is water-soluble, and the water-soluble dissolution temperature is 50 to 60 degrees Celsius.

The above-mentioned electronic product casing molding electrical conduction contact manufacturing method, wherein the laser beam in the step (c) is subjected to a laser engraving angle of 70 to 73 degrees for the peelable film.

The method for manufacturing an electrical contact joint of the electronic product casing, wherein the metal spray coating layer in the step (e) is selected from the group consisting of zinc, copper, nickel, cadmium, zinc-copper alloy and copper-nickel alloy. One of the groups.

1‧‧‧shell

11‧‧‧ Shell side

12‧‧‧ inside

13‧‧‧Outside

14‧‧‧Contact molding area

15‧‧‧Rough surface

2‧‧‧ peelable film

3‧‧‧Electrical conduction contacts

31‧‧‧Metal spray coating

1 is a front view of an electrical product connection of an electronic product casing according to an embodiment of the present invention; the second drawing is an enlarged cross-sectional view taken along line A-A of the first figure; and the third figure is an embodiment of the present invention. The front side of the casing is in front view before processing; the fourth figure is a front view of the embodiment of the present invention in which the peelable film is coated on the inner side of the casing; the fifth figure is the embodiment of the invention to remove the surface of the joint forming zone by laser The front view of the peeling film; the sixth drawing is a cross-sectional enlarged view along the line B-B of the fifth figure; the seventh figure is the front view of the surface of the contact forming area processed into a rough surface according to the embodiment of the present invention; In the embodiment of the present invention, a front view of the contact forming area is sprayed to form an electrical conduction contact; and the ninth drawing is an enlarged cross-sectional view along the line C-C of the eighth figure.

With regard to the technical means and the effects of the present invention for achieving the above object, a feasible embodiment is given, and the following description is given with reference to the following figures: First, please refer to the first to the ninth figures, which can be clearly seen from the figure. It can be seen that the present invention mainly forms an electrical conduction contact 3 inside the casing 1 of the electronic product, and the electronic product includes a smart mobile device, a personal digital assistant, a mobile phone, etc., and the like. The casing 1 of the sub-product may be a plastic body, a glass body, a ceramic body or a metal body of magnesium-aluminum alloy, and the casing 1 has a peripheral edge 11 and an inner side 12 and an opposite outer side 13.

The present invention relates to a method of manufacturing a molded electrical contact 3 for a housing 1 of an electronic product, comprising the steps of: (a) planning a plurality of partial positions of the inner side surface 12 of the housing 1 of the electronic product as contacts Forming zone 14 (refer to the third figure); (b) integrally spraying the low-temperature hardening or high-temperature hardening peelable film 2 on the inner side surface 12 of the casing 1 and the joint forming zone 14 (see the fourth figure) ), and then perform drying and setting and subsequent standing; the peelable film 2 conforms to environmental protection regulations, and its composition contains ethoxy triacrylate propane trimethyl methacrylate, polyacrylic acid, polypropylene glycol monobutyl ether, water, and it is dried. The required temperature for setting is 45-65 degrees Celsius, the ambient temperature is 20 degrees Celsius ± 5 degrees, the ambient humidity is 40% RH ± 5% RH; the peelable film 2 is water-soluble, and the water-soluble dissolution temperature is 50 ° Celsius. 60 degrees; (c) using the laser beam to remove the peelable film 2 of the casing 1 on the upper surface of the joint forming region 14, and the laser beam is laser-engraved for the peelable film 2 at an optimum angle of 70-73 Degrees to reveal the surface of the inner side surface 12 in the range of each of the contact forming regions 14 and its periphery (see Figures 5 and 6); (d) continuing to machine the surface of the inner side surface 12 in the range of each of the contact forming regions 14 into a rough surface 15 by a laser beam (see the seventh drawing); (e) blowing and melting the pressurized gas by a normal temperature air pressure spraying method. The metal forms metal particles, and the metal particles are sprayed and fixed on the rough surface 15 of each contact forming region 14, The metal spray coating layer 31 is formed (see FIGS. 8 and 9), and each of the metal spray coating layers 31 is instantaneously cooled to form an electrical conduction contact 3. The metal spray coating 31 may be selected from one of the group consisting of zinc, copper, nickel, cadmium, zinc-copper alloy and copper-nickel alloy, so that the electrical conduction contact 3 can be used to turn on the electronic product. Internally related electronic circuit and electronic components; (f) Finally, the peelable film 2 of the inner side 12 of the casing 1 is quickly peeled off to completely reveal the inner side surface 12 of the casing 1 and the electrical conductive contacts 3 ( See Figures 1 and 2).

By the way, the present invention mainly uses a low-temperature hardening or high-temperature hardening type peelable film 2 to spray a non-processing area which is shielded inside the electronic product casing 1, and is further roughened by a laser to form a contact forming zone 14, and then a spray spray is applied. The metal-clad consolidation forms the electrical conduction contact 3, which can improve the bonding force and the fineness of the contact, improve the manufacturing efficiency, meet the environmental protection regulations, and omit the cost associated with the shielding fixture required for the housing 1, saving manpower, Material and working hours, and lower costs.

When the casing 1 of the present invention in the step (a) is a metal body or a plastic body, a carbon dioxide laser is used in the step (c), and a red laser is used in the step (d). When the casing 1 in the step (a) is a glass body, a carbon dioxide laser is used in the step (c), and a violet laser is used in the step (d). Further, when the casing 1 in the step (a) is a ceramic body, the carbon dioxide laser is used in the step (c), and the red laser and the green laser are sequentially used in the step (d). In addition, the inner side surface 12 of the plastic, glass or ceramic material case 1 can be set as an anodized layer, and then steps (a), (b), (c) and (d) are sequentially performed to laser The beam processes the surface of the inner side surface 12 in the range of each of the contact forming regions 14 into a rough surface 15 (see the seventh figure), and then performs the steps (e) and (f) to spray the metal particles to each other. The rough surface 15 of the forming region 14 is formed to form a metal spray coating layer 31 (see FIGS. 8 and 9), and each of the metal spray coating layers 31 is instantaneously cooled to become an electrical conduction contact 3, and finally the shell is The peelable film 2 of the inner side 12 of the body 1 is directly peeled off.

In the step (e), the metal particles are sprayed and fixed on the rough surface 15 of each contact forming portion 14 by a normal temperature air pressure spraying method to form a metal spray coating layer 31 (see eighth and ninth). FIG. 4), and each of the metal spray coating layers 31 is instantaneously cooled to become an electrical conduction contact 3. The spraying pressure used in the normal temperature air pressure spraying method is 3~12 Bars, and the spraying machine can adjust the melting temperature according to different conductive materials. The voltage used in the spraying machine is 20~50V, and the current used is 185~ 295 amps, the metal is melted by an arc method, and then metal particles are blown by a pressurized gas, and the metal particles are sprayed and fixed on the rough surface 15 to form a metal spray coating layer 31, and the temperature of the metal particles is instantly lowered to normal temperature. It is about 24 to 40 degrees Celsius, and the electrical conduction contact 3 is formed. Furthermore, the adhesion of the metal spray coating layer 31 to the rough surface 15 is 99.8 kgf/cm 2 to 150 kgf/cm 2 , and the porosity of the metal spray coating layer 31 is 1 to 5% to improve the bonding force. And meticulousness.

The above embodiments are intended to be illustrative of the present invention and are not intended to be limiting, and the various modifications and modifications which may be made by those skilled in the art are still included in the following claims. In the scope.

Claims (10)

The invention relates to a method for manufacturing an electrical conduction joint of an electronic product casing, which comprises the following steps: (a) planning a local position of the inner side of the casing of the electronic product as a contact forming zone; (b) connecting the inner side of the casing The point forming zone is integrally coated with a low temperature hardening or high temperature hardening peelable film, and then dried and shaped; (c) a laser beam is used to remove the peelable film on the surface of the joint forming portion of the casing; (d) Continue to process the surface of the contact forming area into a rough surface with a laser beam; (e) use a normal temperature air pressure spraying method to blow the molten metal to form a metal particle by a pressurized gas, and spray the metal particles to the roughness of the joint forming region. A metal spray coating layer is formed on the surface, and the metal spray coating layer is instantaneously cooled to become an electrical conduction contact; (f) the peelable adhesive film on the inner side surface of the casing is peeled off. The manufacturing method of forming an electrical continuity contact for an electronic product casing according to claim 1, wherein the casing in the step (a) is a metal body, and the carbon dioxide laser is used in the step (c), and (d) A red laser is used in the step. The method for manufacturing an electrical continuity contact for an electronic product casing according to claim 1, wherein the casing in the step (a) is a plastic body, and the carbon dioxide laser is used in the step (c), and (d) A red laser is used in the step. The method for manufacturing an electrical continuity contact of an electronic product casing according to claim 1, wherein the casing in the step (a) is a glass body, and in the step (c) Use a carbon dioxide laser and use a violet laser in step (d). The method for manufacturing an electrical contact of an electronic product case according to claim 1, wherein the casing in the step (a) is a ceramic body, and the carbon dioxide laser is used in the step (c), and (d) The red laser and green laser are used in sequence. The manufacturing method of forming an electrical conduction contact for an electronic product case according to the invention of claim 1, wherein the housing in the step (a) is a plastic body, a glass body or a ceramic body, and an inner side of the housing is an anode. Processing layer. The method for manufacturing an electrical contact of an electronic product case according to the invention of claim 1, wherein the peelable film component in the step (b) comprises propylene triacetate propylene trimethacrylate and polyacrylic acid. , polypropylene glycol monobutyl ether, water, and the temperature required for drying and setting is 45 to 65 degrees Celsius. The method for manufacturing an electrical contact of an electronic product case according to claim 7, wherein the peelable film in the step (b) is water-soluble, and the water-soluble dissolution temperature is 50 to 60 degrees Celsius. . The method for manufacturing an electrical continuity contact of an electronic product casing according to claim 1, wherein the laser beam in the step (c) is subjected to a laser engraving angle of 70 to 73 degrees for the peelable film. The method for manufacturing an electrical contact joint for molding an electronic product case according to claim 1, wherein the metal spray coating layer in the step (e) is selected from the group consisting of zinc, copper, nickel, cadmium, and zinc. One of a group of copper alloys and copper-nickel alloys.