The wire drawing process is to be done after stamping. The wire drawing can be made into straight grains, random grains, threads, corrugated and spiral grains according to the needs of decoration.

　　Straight-grain wire drawing refers to the machining of straight lines on the surface of the aluminum plate by mechanical friction. It has the dual function of removing scratches on the surface of the aluminum plate and decorating the surface of the aluminum plate. There are two types of straight wire drawing: continuous wire and intermittent wire. Continuous thread patterns can be obtained by scouring pads or stainless steel brushes through continuous horizontal straight-line rubbing on the surface of the aluminum plate (such as manual grinding under the existing device or using a planer to clamp the wire brush on the aluminum plate). By changing the wire diameter of the stainless steel brush, textures of different thicknesses can be obtained. Intermittent silk patterns are generally processed on brushing machines or rubbing machines. Production principle: Two sets of differential wheels rotating in the same direction are used. The upper set is a fast-rotating grinding roller, and the lower set is a slow-rotating rubber roller. The aluminum or aluminum alloy plate passes through the two sets of rollers and is brushed out. Delicate intermittent straight lines.

　　 Random wire drawing is a kind of irregular and non-obvious matte wire pattern obtained by moving and rubbing the aluminum plate back and forth under the high-speed copper wire brush. This kind of processing has higher requirements on the surface of aluminum or aluminum alloy plates.

　　The corrugation is generally made on a brushing machine or a rubbing machine. Use the axial movement of the upper group of grinding rollers to brush on the surface of the aluminum or aluminum alloy plate to obtain wave patterns.

　　 Swirl is also called optical rotation. It is a kind of silk pattern obtained by using cylindrical felt or grind nylon wheel to install on a drilling machine, blending polishing oil with kerosene, and rotating and polishing the surface of aluminum or aluminum alloy plate. It is mostly used for decorative processing of round signs and small decorative dials.

The thread is to use a small motor with a round felt on the shaft, fix it on the table, at an angle of about 60 degrees with the edge of the table, and make a carriage with a fixed aluminum plate for pressing tea. A polyester film with straight edges is used to limit thread competition. Using the rotation of the felt and the linear movement of the carriage, a thread pattern with the same width is rubbed on the surface of the aluminum plate.

　　Sandblasting is to obtain the surface of light decoration or subtle reflective surface to meet special design needs such as soft gloss. Even and moderate sandblasting can basically overcome the common defects of aluminum surface.

　　 For appearance parts, whether it is wire drawing or sandblasting, surface oxidation treatment is usually required. As for which processing technology to choose, it should be an issue to be considered related to modeling. The surface textures obtained by the two processes are still different.

In addition, there is a process similar to sandblasting, but it is carried out by a chemical corrosion method, commonly known as chemical sand-blasting treatment or chemical sand surface corrosion. It is especially suitable for aluminum surface treatment. The uniformity of the sand surface is far better than that of blasting. Sand treatment. Chemical sand surface corrosion is divided into acid corrosion and alkaline corrosion. Different corrosive solvents and sand surface agents can obtain different surface colors and sand grain thicknesses.