TW201821181A - Manufacturing method of a metal workpiece adapted for anodic treatment - Google Patents

Abstract

A manufacturing method of a metal workpiece adapted for anodic treatment, which includes a forming step and a die casting step. In said forming step, a first metal material having a silicon content of less than 1% is processed into an exterior part. In said die casting step, a second metal material is injected into a die of which said exterior part is already being placed inside, and subsequently forms an interior part on the inner surface of said exterior part.

Description

Method for manufacturing metal-worked parts suitable for anode treatment

The present invention relates to a method for manufacturing metal-worked parts, in particular to a method for manufacturing metal-worked parts suitable for anodization.

The aluminum alloy ingot for die casting can be processed into a metal workpiece with a complicated shape through the die casting process. Due to the fast speed and high precision of the die casting process, and more complex shapes than the stamping process and the extrusion process, it is It is widely used in various products. For example, a notebook computer with a variety of electronic parts inside can make the metal processed part into a shell panel, thereby assembling and protecting the internal electronic parts.

In order to further increase the corrosion resistance, wear resistance and aesthetics of the metal processed part, anodizing process is generally used again to cover the surface of the metal processed part with an oxide film. However, the commonly used aluminum alloy ingots for die casting have high silicon content (eg ADC10, ADC12). Once the processed metal parts are anodized, they will form tiny bumps, which not only reduces the overall texture , The appearance will also appear gray-black, so it is less suitable for anodizing; but if you use aluminum alloy ingots for die casting (such as ADC6) with a low silicon content or even no silicon, the processed metal parts are anodized although It is not easy to produce bumps, and it can show an excellent texture, but it is easy to produce flow marks and different grain sizes during die casting, so the appearance is still not good.

In addition, of course, there are materials more suitable for anodizing, such as pure aluminum, or aluminum alloys 1050 and 6061. However, these materials are only suitable for the stamping process and extrusion process for manufacturing simple structures. If the required structure is slightly complicated, it cannot be applied. Therefore, how to manufacture a metal processed part with an internal structure, and at the same time, anodization can be performed on the metal processed part to form an excellent appearance, has become a challenge for related industries.

Therefore, the object of the present invention is to provide a method for manufacturing an anodized metal work piece.

Therefore, the present invention is applicable to a method for manufacturing an anodized metal workpiece, which includes a forming step and a die casting step.

In the forming step, a first metal material with a silicon content of less than 1% is formed into an external panel by a molding device, and a combined space is surrounded by the outer panel ring.

In the die-casting step, a second metal material is passed through a processing device to form an internal mechanism in the combined space, and the internal mechanism and the external panel are combined to form the metal processed part.

The effect of the present invention is that: through the forming step, the first metal material can be formed into the external panel suitable for anodizing; and through the die casting step, the second metal material can be processed into the external The panel is combined with the internal mechanism and forms the metal working piece.

Referring to FIGS. 1 and 2, an embodiment of the method for manufacturing an anodized metal working piece according to the present invention includes a forming step 1, a die casting step 2, and a trimming step 3.

First, the molding step 1 is performed. According to the appearance requirements of different products, a first metal material with a silicon content of less than 1% is processed into an exterior panel 4 of a desired appearance by a molding equipment, and the external The panel 4 turns around a combined space 41. Among them, the molding equipment is one of a stamping molding device, a hydraulic molding device, and a pneumatic molding device; and the preferred choice of the first metal material is pure aluminum, aluminum alloy, aluminum magnesium alloy, aluminum manganese alloy, etc., for example Aluminum alloys such as 1050 or 6061 are very suitable choices.

Next, the die-casting step 2 is performed, and the external panel 4 is fixed on a processing device by mechanical clamping, vacuum suction, adhesive or other suitable fixing methods. Wherein, the processing equipment is a die-casting mold, and the cavity of the die-casting mold is designed to match the required structure, for example, a cavity with bosses or ribs.

After the outer panel 4 is firmly fixed, a second metal material can be applied with high temperature to melt it into a liquid state, so that the second metal material is injected into the die-casting mold to form a one in the combined space 41 Internal mechanism 5 with the required structure, and because the internal mechanism 5 is in contact with the external panel 4 during cooling, the internal mechanism 5 will be combined with the external panel 4 after cooling to form the metal Processed parts. It should be particularly noted that the composition of the second metal material is not limited. Generally speaking, materials that are more suitable for die casting, such as ADC10 and ADC12, are selected.

After the internal mechanism 5 is actually formed, the trimming step 3 can be performed, that is, trimming, deburring, grinding, and polishing the metal-worked part, thereby removing the flow channel, overflow well, and flash generated by the injection.

After all the above steps are completed, the metal-worked part is finished. At this time, the metal-worked part is anodized, and the surface of the metal-worked part can be covered with a corrosion-resistant and wear-resistant oxide film. In particular, because the silicon content of the external panel 4 is less than 1%, the appearance of the external panel 4 will not only produce bumps, but will become smooth and bright; and the internal mechanism 5 is composed of ingredients The second metal is not limited, so it may produce bumps after anodizing, and in the die-casting step 2 may cause flow marks or other appearance problems, but because the internal mechanism 5 is It is hidden inside the external panel 4, so it does not affect the overall appearance. As a result, as shown in FIG. 2, the metal-worked product having both an excellent appearance and a complicated internal structure can be obtained.

To sum up, the present invention is applicable to the manufacturing method of anodized metal working parts. First, the outer step 4 suitable for anodizing is manufactured through the forming step 1; then through the die-casting step 2, the combination The space 41 manufactures the internal mechanism 5 having a complicated structure, and at the same time, the external panel 4 and the internal mechanism 5 are combined into the metal working piece, so the purpose of the invention can indeed be achieved.

However, the above are only examples of the present invention, and should not be used to limit the scope of implementation of the present invention, any simple equivalent changes and modifications made in accordance with the scope of the patent application of the present invention and the contents of the patent specification are still Within the scope of the invention patent.

1‧‧‧Molding steps

2‧‧‧Die casting steps

3‧‧‧ Dressing steps

4‧‧‧External panel

41‧‧‧Combined space

5‧‧‧Internal organization

Other features and effects of the present invention will be clearly presented in the embodiment with reference to the drawings, in which: FIG. 1 is a flowchart illustrating an embodiment of a method for manufacturing an anodized metal-worked article of the present invention; And FIG. 2 is a perspective view illustrating the finished product of the metal-worked part manufactured by the embodiment.

Claims (7)

A method for manufacturing metal-worked parts suitable for anodizing, including: a forming step, forming a first metal material with a silicon content of less than 1% into an outer panel by a forming device, and the outer panel ring Around a combined space; in a die-casting step, a second metal material is passed through a processing device to form an internal mechanism in the combined space, and the internal mechanism and the external panel are combined to form the metal processing Pieces. The method for manufacturing an anodized metal work piece as claimed in claim 1, wherein, in the die-casting step, the processing equipment is a die-casting mold, the outer panel is fixed by the die-casting mold, and the second metal When the material is injected into the die-casting mold, the second metal material can process the internal mechanism combined with the external panel, thereby forming the metal processed part. The method for manufacturing an anodized metal work piece according to claim 2, wherein the method of fixing the outer panel to the die-casting mold is one of mechanical clamping, vacuum suction, and adhesive bonding. The method for manufacturing an anodized metal work piece as described in claim 2 further includes a trimming step. The trimming step is trimming, deburring, grinding and polishing the metal work piece. The method for manufacturing an anodized metal work piece according to any one of claims 1 to 4, wherein the first metal material is selected from pure aluminum, aluminum alloy, aluminum-magnesium alloy, and aluminum-manganese alloy Formed groups. The method for manufacturing an anodized metal work piece according to any one of claims 1 to 4, wherein the second metal material is selected from the group consisting of ADC10 and ADC12. The method for manufacturing an anodized metal work piece according to any one of claims 1 to 4, wherein the forming apparatus is one of a press forming device, a hydraulic forming device, and a pneumatic forming device.