Construction of the chassis
The chassis is generally composed of a shell, a bracket, and a front panel. Shell hardness is high, mainly to protect the internal components of the chassis and the role of radiation protection. The bracket is mainly used to fix the motherboard, power supply and various drives. Taking into account the chassis expansion kit card socket, the number of drive racks directly affect the future expansion of the device, the general manufacturers in the design of the chassis will often be reserved two to three drive installation position, so that customers can directly expand the device for upgrading. Most of the front panel of the chassis is made of high hardness ABS or HIPS engineering plastics, even if used for a long time will not be yellowed or cracked, and easy to clean. In addition to the basic installation port, switches, indicators, many chassis now also added a number of practical functions on the front panel. Such as some chassis in the front panel is very considerate to set up the audio interface, USB interface and microphone interface, etc., all the subtleties show the humanized design, greatly facilitating the use of the user; and also has a number of 5.25-inch drive mounting bracket and 3.5-inch floppy disk drive / hard drive mounting bracket, the other expansion kits card socket is also a complete, even if it is more than one piece of equipment can be accommodated, it is very suitable for those hardbody enthusiasts.
Materials
The chassis is mainly composed of a plastic front panel and a steel plate riveted to the frame of the two parts, the front of the front panel of the high-end chassis mentioned above is made of high hardness ABS engineering plastics Note: ABS engineering plastics are impact-resistant, strong toughness, non-toxicity, etc. Certified ABS materials will be printed with "ABS" on the plastic, which can be used for a variety of applications, such as computer games, computer games and other games. Plastic printed with the word "ABS" to ensure the stability of the front panel of the chassis. Moreover, ABS engineering plastics also have the characteristic of not easy to fade, can keep the appearance of color for a long time.
Inferior chassis more ordinary plastic products, time will be yellowed, aging and even cracked, after a period of time, the front panel of the original beautiful appearance will become dilapidated. As for the chassis itself, the thickness of the steel plate should be at least one millimeter or more, and the plate should be specially treated SECC cold galvanized steel, so that the chassis made of steel plate has a high degree of shelter, high conductivity, rigidity, good, not easy to rust, corrosion resistance and other characteristics. Due to the higher conductivity of thicker cold galvanized steel plate, so the electromagnetic radiation inside and outside the chassis has a certain shielding effect, can effectively prevent electromagnetic radiation and interference, is conducive to improving the stability of the entire system. The inferior chassis of the box used in the steel plate is also very thin, the entire chassis appears weak, with two hands, a little force, you can make the skeleton of the chassis deformation, or even broken. Then there is no rigidity due to the plate, it is very easy to lead to inaccurate positioning of the card slot, so that the installation of the card is difficult, if you meet this chassis, or give up while you can. A long time will be yellowing, aging and even cracking. Now there are a lot of audiophile chassis with special materials, all-aluminum alloy, and even fully transparent chassis, very beautiful, just the price is also very cool.
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