KR100910649B1 - Method for mamufacturing metal adhesion molding for electronic qpparatus - Google Patents

Abstract

The present invention is to manufacture a metal adhesive molded products applied to various portable electronic devices such as portable telephones or PDAs, PSPs, PMPs, notebooks, and various home appliances, and in particular, processed into a predetermined shape for application to various electronic devices. Injection molding of the joint of the synthetic resin that allows the metal sheet material to be bonded to the electronic device, forming a metal adhesive molding of the adhesive coating process and the injection process between the primary polishing process and the secondary polishing process, such a metal As the metal surface of the adhesive molding is subjected to surface treatment such as chromium plating or anodizing or painting or electrodeposition coating,

Through process change, it is possible to mass-produce higher quality products in large quantities by preventing the quality loss while preventing economic loss caused by the conventionally reduced yield, especially sodium metasilicate used in the cleaning step. Cleaner made of a mixture of and potassium Pyro Phosphate is harmless to the human body to create a pleasant working environment.Ecoizer, a strong alkaline electrolytic water used in the surface treatment step, is harmless to the human body and has excellent cleaning power. With excellent sterilization and anti-rust effect, it has the characteristics to produce higher quality metal adhesive molding products.

Metal Adhesive Molding, Metal Sheet, Injection, Surface Treatment, Eco-Mizer, Cleaning, Plating

Description

Manufacturing method for producing metal adhesive molding products for electronic devices {Method for mamufacturing metal adhesion molding for electronic qpparatus}

The present invention is to manufacture a metal adhesive molding products applied to various portable electronic devices such as portable telephones or PDAs, PSPs, PMPs, notebooks, and various home appliances, and in particular, surface protection and durability improvement and decorative properties of various electronic devices. By changing the manufacturing process of the metal adhesive molding, in which the fastening portion of the synthetic resin material to be integrally bonded to one side of the metal plate material to be connected to the main body of the electronic device, it is possible to not only improve productivity but also reduce the defective rate and mass-produce high quality products in large quantities. It is possible to build a pleasant working environment due to the cleaner that is harmless to the human body.

In general, a variety of electronic and electrical devices, such as portable telephones, PDAs, PSPs, PMPs, notebooks, etc., use metal adhesive moldings formed by bending metal sheets to improve durability and durability of the front surface thereof. Done.

Such a metal adhesive molding has a characteristic of directing the exterior of the product more luxuriously because it expresses the beautiful luster and texture unique to the metal as well as the durability improvement that can withstand scratches or impacts.

The metal adhesive molding is a metal plate material of the surface can not be mounted directly on the body of the electronic and electrical equipment, injection molding the joint portion made of a synthetic resin material on one surface of the metal plate material, by using the fastening portion described above as a small fastening bolt It is to have a solid connection with the body.

Therefore, the metal adhesive molding as described above is that the fastening part of the synthetic resin material made of transparent or opaque on one surface of the metal plate of the thin plate is adhesive molded, as shown in FIG. 1 when the operation process for manufacturing the metal adhesive molding is outlined. .

That is, the pressing step of bending and cutting into a predetermined shape by pressing the molding member made of a metal plate (S100); Polishing step of processing the surface of the pressed metal sheet beautifully (S110); A surface treatment step of performing chromium plating on the surface of the polished metal sheet (S120); An adhesive coating step of applying an adhesive liquid to one surface of the surface-treated metal sheet (S130); It consists of an injection molding step (S140) for molding a fastening portion made of resin using a synthetic resin or the like on one surface of the metal plate material coated with the adhesive.

The metal adhesive molding obtained by such a manufacturing process has excellent durability and chemical resistance while maintaining the gloss and texture peculiar to the metal, and the fastening part made of synthetic resin is more easily fastened and combined with the main body of various electronic and electrical devices. It has the features to do it.

However, in the method of manufacturing the metal adhesive molding as described above, the metal adhesive molding is completed by injection molding in a state in which the metal sheet material, which has been completed through the polishing process and the surface treatment process such as chromium plating, is placed inside the mold, thereby completing the metal adhesive molding. If stamping or scratching occurs during the injection process, the metal plate material after the post-processing is finished is not economical because it cannot be reused and must be disposed of in its entirety.

That is, since the metal sheet material having a smooth surface formed through the polishing process and the surface treatment process is placed inside the mold frame again, the injection process must be additionally performed, and thus, the metal surface described above by various causes and work processes during the injection process. The scratches and stamps are caused to act as a direct cause of a significant drop in the yield of the finished product.

Therefore, the loss of raw materials and productivity decrease due to the rise of the defective rate as described above leads to economic loss, and the problem of deteriorating the quality of the product by stamping or scratching of the product surface or various foreign substances, oils and fingerprints, etc. generated in the injection process. To have.

In particular, trichloroethylene (TEC) used in the polishing process is known as a substance that causes the central nervous system inhibition, liver function damage, cardiovascular damage, headache, dizziness, vomiting, etc., when absorbed into the human body. Not only will it not be possible to establish a working environment, but it will also seriously affect worker health.

In addition, when trichloroethylene (TCE) cleaner is used for the metal products integrated with synthetic resin, the synthetic resin melts due to high heat, which requires careful attention to work and economical losses due to defective products. It is also considerable.

In addition, in the case of using the above-described trichloroethylene (TCE) cleaning agent to install a separate heater in order to improve the effect of the cleaning agent is used to increase the cost of the resulting economic loss, as well as products due to high heat Extremely irrational work is being done because it provides a direct cause of failure.

In addition, the degreasing cleaning used in the surface treatment process is an important part of determining whether to produce a good product or not, and since chemical pretreatment is generally performed, corrosion on the surface of a metal plate made of aluminum, etc. The quality of the product is deteriorated and the productivity is greatly reduced. In order to improve the degreasing power, a degreasing cleaner made of a strong acidic chemical is used, which affects the injection molding and thus the synthetic resin is deformed by chemical reaction. I have it.

The present invention has been made to improve the problems described above, injection molding of the fastening portion of the synthetic resin that can be coupled to the electronic sheet metal sheet material processed into a predetermined shape for application to various electronic devices, the primary Between the polishing process and the secondary polishing process, a metal adhesive molding, which is an adhesive coating process and an injection process, is formed, and the metal surface of the metal adhesive molding is beautiful by surface treatment such as chromium plating or anodizing or painting or electrodeposition coating. While changing the manufacturing process to mass-produce high-quality products, the cleaner and degreasing agent used in the polishing and surface treatment steps are replaced with harmless to human body, ensuring excellent cleaning power and the general manufacturing process. To overcome the problem.

The manufacturing method for producing a metal adhesive molded product for an electronic device of the present invention as described above can prevent the quality loss while preventing the economic loss caused by the conventionally reduced yield through the process change, so that a higher quality product can be mass produced. In particular, the cleaning agent, which is a mixture of sodium metasilicate and potassium pyrophosphate, used in the cleaning step, is harmless to the human body and creates a pleasant working environment. Ecomizer, which is a strong alkaline electrolytic water, is characterized by being able to produce higher quality metal adhesive molding products because it is harmless to human body and has excellent cleaning power and excellent sterilization and rust prevention effect.

Hereinafter, embodiments of the present invention will be described.

1 is a manufacturing process block diagram listing the manufacturing method according to the present invention by process.

The present invention, the pressing step of bending and cutting the metal plate material into a predetermined shape; (S10) the first polishing step for processing the surface of the pressed metal molding; (S20) the adhesive liquid to the first polished metal molding (S30) a fastening part molding step of injection molding a fastening part made of synthetic resin to a metal molding coated with an adhesive; and (S40) a secondary process for processing the surface of a metal adhesive molding having a fastening part made of resin. (S50) a cleaning step of removing foreign matter and oil from the secondary polished metal adhesive molding; and (S60) a surface treatment step performed on the metal surface of the cleaned metal adhesive molding; (S70) sequentially As completed by performing, the surface treatment step (S70) can be completed through the process of chrome plating process (S71) or anodizing process (S72) or painting process (S73), electrodeposition coating (S74).

At this time, the cleaning liquid in the washing step, 28% by weight of sodium metasilicate (Potassium Pyro Phosphate), 20% by weight of sodium gluconate (5%) of sodium gluconate and potassium hydroxide (Potassum Hydroxde) ) 5% by weight, 2% by weight of polyethylene polypropylene pypoly (Polyethylen Polyplopylen Copoly) and polyoxyethylen Lauryl Ether (5% by weight of polyoxyethylen Lauryl Ether) and 35% by weight of distilled water can be used, Polyethylene glycol (PEG200) may be used in the same weight% instead of polyoxyethylen Lauryl Ether.

This cleaning liquid is a pale yellow liquid and has no smell. It is very effective in polishing polish or oil degreasing in the polishing process. Trichlorethylene (TEC), which has been used in the past, is absorbed by the human body and inhibits central nervous system and liver damage. And cardiovascular damage, headache, dizziness, vomiting, etc., but also could not create a pleasant working environment by toxic chemicals, the synthetic resin melts when using a trichloroethylene cleaning agent in metal products integrated with synthetic resin This occurred frequently.

Accordingly, the cleaning agent according to the present invention was confirmed to have excellent foreign matter removal and degreasing performance while being harmless to the human body.

Various embodiments through the manufacturing method of the present invention as described above will be described.

Example 1

Surface treatment step (S70) is performed by the chromium plating process (S71) as shown in FIG.

Pressing step of bending and cutting the metal plate material into a predetermined shape; (S10) The first polishing step for processing the surface of the pressed metal molding; (S20) Adhesive coating for applying the adhesive liquid to the first polished metal molding (S30) a fastening part molding step of injection molding a fastening part made of synthetic resin to a metal molding coated with an adhesive; (S40) a second polishing step of processing the surface of the metal adhesive molding having a fastening part made of resin; (S50) a cleaning step of removing foreign matter and oil from the secondary polished metal adhesive molding; and (S60) a surface treatment step performed on the metal surface of the cleaned metal adhesive molding; (S70) sequentially

The surface treatment step (S70) is made by a chromium plating process (S71), the chromium plating process, the first degreasing process for removing oil and foreign matter on the surface; A first washing step; A cathode electrolytic degreasing process for oxidizing and removing surface foreign matters; A second washing step; A second degreasing step for removing foreign substances and oxide film; A third washing step; A third degreasing step for removing the oxide film and hydroxide; A fourth washing step; Chromium plating process; A fifth washing step; Pure tax process for removing foreign matter and plating solution; It is made of a drying step for removing water.

At this time, the first to third degreasing step is carried out by an Ecoizer solution of 100% strong alkaline electrolytic water at a temperature of 50 ~ 60 ℃ for 10 seconds.

In addition, the first to fifth washing steps are performed for 20 seconds in a room temperature bath.

In addition, the positive electrode degreasing process is performed by applying a voltage of 100 to 200 for 100 to 300 seconds at a temperature of 30 ℃ in a degreasing bath mixed with 50 grams of blue soda per liter and 50 grams of caustic soda per liter.

In addition, the pure water washing process is performed for 60 to 120 seconds in a room temperature bath.

In addition, the drying process is ideally made for 900 seconds in a drying furnace of 80 ~ 100 ℃.

Here, the Ecoizer is a strong alkaline electrolytic water that can be used as an environmentally friendly and powerful degreasing agent, and is produced by electrolysis of water.

The ecomizer uses a small amount of potassium carbonate as an electrolyte, but the produced ecomizer does not contain potassium carbonate, and is a small amount of aqueous potassium hydroxide solution, but a completely different solution from sodium hydroxide, and no chemical synthesis material is used. Since the BOD, COD, N-nucleic acid and SS value are '0'. In particular, it is possible to reuse the oil because it is easy to separate the oil.

In addition, since there is no foaming property, the use of rinsing in the cleaning process is greatly reduced, and since it is highly stable to the human body, it is widely used for washing hands or cleaning equipment in hospitals and food factories. It is an alternative to many chemical system (TC) cleaners.

Such an economizer is a solution containing a large amount of anion electrons, and the negative ions approach the sludge and the substrate to generate forces between the molecules to cation the surface of the sludge and the substrate, and the negative ions push each other out of the sludge and the substrate surface. When ions surround the surface of the sludge and the substrate, the sludge is easily separated from the substrate by the repulsive force between the negative ions covering the sludge.

These economizers are also known to have excellent anti-rusting ability and form a film on the metal surface to prevent oxidation of the metal.

In particular, the result of the safety test based on the OECD Chemical Toxicity Test Guideline (1987) indicates that the substance is extremely safe for human body, as it has been evaluated as non-irritant, and has excellent sterilization effect and excellent oil separation. Using the right device is very economical because it can be used several times and days without compromising capability.

Example 2

Surface treatment step (S70) is performed by the anodizing process (S72) as shown in FIG.

Pressing step of bending and cutting the metal plate material into a predetermined shape; (S10) The first polishing step for processing the surface of the pressed metal molding; (S20) Adhesive coating for applying the adhesive liquid to the first polished metal molding (S30) a fastening part molding step of injection molding a fastening part made of synthetic resin to a metal molding coated with an adhesive; (S40) a second polishing step of processing the surface of the metal adhesive molding having a fastening part made of resin; (S50) a cleaning step of removing foreign matter and oil from the secondary polished metal adhesive molding; and (S60) a surface treatment step performed on the metal surface of the cleaned metal adhesive molding; (S70) sequentially

The surface treatment step (S70) is performed by an anodizing process (S72), the anodizing process, the first degreasing process for removing foreign matter and oil on the metal adhesive molding surface; Chemical sanding and chemical polishing processes to remove scratches and harmful defects and to polish the surface; A first dismute step for removing oxides on the surface of the article; A second degreasing step for removing foreign substances and oil; A second dismute step for removing oxides from the surface; An anodizing process for forming an oxide film on the surface; A coloring step for imparting color using an organic or inorganic dye; Sealing process to fill the pores of the oxide film to increase the corrosion resistance and improve the stain resistance and chemical resistance; A hot water washing process for removing surface foreign matters; It is made by a drying process for removing surface moisture.

At this time, between the above-described process may be further performed the washing step for 20 seconds in the room temperature bath.

In addition, the first and second degreasing step is ideally carried out by the Ecomizer (Ecomizer) solution of 100% strong alkaline electrolytic water at a temperature of 50 ~ 60 ℃.

Example 3

The surface treatment step S70 is performed by the painting process S73 as shown in FIG. 5.

Pressing step of bending and cutting the metal plate material into a predetermined shape; (S10) The first polishing step for processing the surface of the pressed metal molding; (S20) Adhesive coating for applying the adhesive liquid to the first polished metal molding (S30) a fastening part molding step of injection molding a fastening part made of synthetic resin to a metal molding coated with an adhesive; (S40) a second polishing step of processing the surface of the metal adhesive molding having a fastening part made of resin; (S50) a cleaning step of removing foreign matter and oil from the secondary polished metal adhesive molding; and (S60) a surface treatment step performed on the metal surface of the cleaned metal adhesive molding; (S70) sequentially

The surface treatment step (S70) is made by the painting process (S73), the painting process, the washing step for removing foreign matters; 2-component modified urethane process for increasing the adhesion of the paint; A drying process for removing water; Silk printing process; It consists of a forced drying process for drying the coating film and securing properties.

At this time, the two-component modified urethane process, the two-component modified urethane is applied to the surface to form a coating film having a thickness of 20 ~ 25㎛.

In addition, the drying process is made by hot air drying at 80 ~ 90 ℃ for 120 ~ 180 seconds inside.

In particular, the forced drying process is ideal to be carried out in the hot air drying of 80 ~ 90 ℃ for 300 ~ 420 seconds.

Example 4

Surface treatment step (S70) is performed by the electrodeposition coating process (S74) as shown in FIG.

Pressing step of bending and cutting the metal plate material into a predetermined shape; (S10) The first polishing step for processing the surface of the pressed metal molding; (S20) Adhesive coating for applying the adhesive liquid to the first polished metal molding (S30) a fastening part molding step of injection molding a fastening part made of synthetic resin to a metal molding coated with an adhesive; (S40) a second polishing step of processing the surface of the metal adhesive molding having a fastening part made of resin; (S50) the surface of the secondary polished metal adhesive molding to remove the substance and oil; and (S60) a surface treatment step to be performed on the metal surface of the cleaned metal adhesive molding; (S70)

The surface treatment step (S70) is made by the electrodeposition coating process (S74), the electrodeposition coating process, the first degreasing process for removing foreign matter or oil on the surface of the product; A second degreasing step for removing foreign substances and oil; A dedusting step for removing oxides generated on the surface of the product after degreasing; Boiling water process to remove remaining foreign substances and improve adhesion during coating; An electrodeposition coating process for forming a coating film on the surface of the product; A predrying process for improving the adhesion and wear resistance of the coating film; It is done by performing a UV drying step to improve the adhesion and wear resistance of the coating film.

At this time, the first and second degreasing process is performed by an Ecomizer (Ecomizer) solution of 100% strong alkaline electrolytic water at a temperature of 50 ~ 60 ℃.

In addition, the dismute process is performed to deposit the product for 5 to 15 seconds at room temperature using a nitric acid solution of 20% concentration.

The metal adhesive molding completed through various embodiments as described above is formed with a metal molding (1) having a beautiful gloss, texture, and color characteristic of the metal on its outer surface through a surface treatment process as shown in FIG. On the bottom of the molding 1, a fastening part 2 made of resin for fastening with a main body of various electronic and electrical devices is adhesive molded.

Therefore, the manufacturing method of the metal adhesive molding according to the present invention can not only reduce production costs, but also improve productivity and mass produce high quality metal adhesive molding in large quantities, and create a more comfortable working environment through a cleaner that is harmless to human body. It will be possible.

1 is a process chart for manufacturing a conventional metal adhesive molding

Figure 2 is a manufacturing process of the metal adhesive molding according to the present invention

Figure 3 is a detailed view of the surface treatment step by chromium plating in the manufacturing process of the metal adhesive molding according to the present invention

Figure 4 is a detailed view of the surface treatment step by anodizing during the manufacturing process of the metal adhesive molding according to the present invention

Figure 5 is a detailed view of the surface treatment step by painting during the manufacturing process of the metal adhesive molding according to the present invention

Figure 6 is a detailed view of the surface treatment step by the electrodeposition coating during the manufacturing process of the metal adhesive molding according to the present invention

Figure 7 is a perspective view of the finished product by a metal adhesive molding manufacturing method according to the present invention

Explanation of symbols on the main parts of the drawings

1: Metal molding 2: Fastening part

Claims (22)

A press step of bending and cutting the metal sheet into a predetermined shape; A primary polishing step of processing the surface of the pressed metal molding; An adhesive coating step of applying an adhesive solution to the first polished metal molding; A fastening part forming step of injection molding a fastening part made of synthetic resin on a metal molding to which an adhesive is applied; A secondary polishing step of processing the surface of the metal adhesive molding having the fastening portion made of resin; A cleaning step of removing surface foreign matter and oil from the secondary polished metal adhesive molding; And a surface treatment step performed on the metal surface of the cleaned metal adhesive molding. A manufacturing method for producing a metal adhesive molding product for an electronic device, which is completed by sequentially performing. The method of claim 1, The cleaning solution in the washing step was 28% by weight sodium metasilicate, 20% by weight potassium pyrophosphosphate, 5% by weight sodium gluconate and 5% by weight potassium hydroxide (potasum hydroxde). And a metal adhesive molding product for an electronic device comprising a mixture of 2% by weight of Polyethyleneen Polyplopylen Copoly, 5% by weight of Polyoxyethylen Lauryl Ether, and 35% by weight of distilled water. Manufacturing method for producing. The method of claim 1, The surface treatment step may be performed by a chromium plating process, the chromium plating process comprising: a first degreasing process for removing oil or foreign matter from the surface; A first washing step; A cathode electrolytic degreasing process for oxidizing and removing surface foreign matters; A second washing step; A second degreasing step for removing foreign substances and oxide film; A third washing step; A third degreasing step for removing the oxide film and hydroxide; A fourth washing step; Chromium plating process; A fifth washing step; Pure tax process for removing foreign matter and plating solution; Drying process for water removal; Manufacturing method for producing a metal adhesive molding products for electronic devices characterized in that consisting of. delete The method of claim 3, wherein The first to third degreasing process is to produce a metal adhesive molding product for an electronic device, characterized in that carried out by the Ecomizer (Ecomizer) solution of 100% strong alkaline electrolytic water at a temperature of 50 ~ 60 ℃. Manufacturing method. The method of claim 3, wherein The first to fifth washing process, the manufacturing method for producing a metal adhesive molded product for an electronic device, characterized in that made for 20 seconds in a room temperature bath. The method of claim 3, wherein The cathode electrolytic degreasing process is carried out by applying a voltage of 100 to 200 for 100 to 300 seconds at a temperature of 30 ° C. in a degreasing tank where 50 grams of blue soda per liter and 50 grams of caustic soda per liter are mixed. Manufacturing method for producing metal adhesive molding products. The method of claim 3, wherein Pure water washing process, the production method for producing a metal adhesive molded product for an electronic device, characterized in that made for 60 ~ 120 seconds in a room temperature bath. The method of claim 3, wherein The drying process is a manufacturing method for producing a metal adhesive molded product for an electronic device, characterized in that the drying is carried out for 900 seconds inside the 80 ~ 100 ℃. The method of claim 1, The surface treatment step may be performed by an anodizing process, the anodizing process comprising: a first degreasing process for removing foreign substances and oil from the surface of the metal adhesive molding; Chemical sanding and chemical polishing processes to remove scratches and harmful defects and to polish the surface; A first dismute step for removing oxides on the surface of the article; A second degreasing step for removing foreign substances and oil; A second dismute step for removing oxides from the surface; An anodizing process for forming an oxide film on the surface; A coloring step for imparting color using an organic or inorganic dye; Sealing process to fill the pores of the oxide film to increase the corrosion resistance and improve the stain resistance and chemical resistance; A hot water washing process for removing surface foreign matters; Method for producing a metal adhesive molded product for an electronic device, characterized in that made by; drying step for removing surface moisture. delete The method of claim 10, Between each process, a manufacturing method for producing a metal adhesive molded product for an electronic device, characterized in that further performing a washing process made in a room temperature bath for 20 seconds. The method of claim 10, The first and second degreasing process is to produce a metal adhesive molding product for electronic devices, characterized in that carried out by the Ecomizer (Ecomizer) solution of 100% strong alkaline electrolytic water at a temperature of 50 ~ 60 ℃. Manufacturing method. The method of claim 1, The surface treatment step is made by a painting process, the painting process is a washing process for removing foreign matter; 2-component modified urethane process for increasing the adhesion of the paint; A drying process for removing water; Silk printing process; Forced drying process for drying the coating film and securing the physical properties; manufacturing method for producing a metal adhesive molding products for electronic devices. delete The method of claim 14, The two-component modified urethane process is a manufacturing method for producing a metal adhesive molded product for an electronic device, characterized in that to apply a two-component modified urethane to the surface to form a coating film having a thickness of 20 ~ 25㎛. The method of claim 14, The drying process is a manufacturing method for producing a metal adhesive molding product for an electronic device, characterized in that the hot air drying at 80-90 ° C. for 120-180 seconds. The method of claim 14, Forced drying process is a manufacturing method for producing a metal adhesive molding product for electronic devices, characterized in that the hot air drying at 80 ~ 90 ℃ made for 300 ~ 420 seconds. The method of claim 1, The surface treatment step may be performed by an electrodeposition coating process, the electrodeposition coating process comprising: a first degreasing process for removing foreign substances or oil on the surface of the product; A second degreasing step for removing foreign substances and oil; A dedusting step for removing oxides generated on the surface of the product after degreasing; Boiling water process to remove remaining foreign substances and improve adhesion during coating; An electrodeposition coating process for forming a coating film on the surface of the product; A predrying process for improving the adhesion and wear resistance of the coating film; UV drying process for improving the adhesion and wear resistance of the coating film; manufacturing method for producing a metal adhesive molding products for electronic devices characterized in that it is carried out. delete The method of claim 19, The first and second degreasing process is to produce a metal adhesive molding product for electronic devices, characterized in that carried out by the Ecomizer (Ecomizer) solution of 100% strong alkaline electrolytic water at a temperature of 50 ~ 60 ℃. Manufacturing method. The method of claim 19, The desmut process is a manufacturing method for producing a metal adhesive molded product for electronic devices, characterized in that the product is carried out by deposition for 5 to 15 seconds at room temperature using a nitric acid solution of 20% concentration.

Images