Car phone

According to statistics from foreign car safety professionals, the traffic accident death rate is 13% for motorists who are taking phone calls, and only 4% for other motorists. In addition, the vehicle speed is In the case of 110 km/h, the braking distance of a normal driver is 31 meters. The driver who has an alcohol content exceeding the standard brake distance is 35 meters, and the driver who receives the mobile phone has a braking distance of 45 meters. For many busy owners, many important calls have to be answered when driving. Car radio is a good choice.

The mainstream car phone products currently on the market are broadly divided into two categories: one is a pick-up vehicle-mounted wireless headset; the other is a fixed-car speakerphone.

Fixed car handsfree

Telephones of this type are fixed in the front center armrest. Compared to pickup-type wireless headphones, their sound quality is relatively good, but the price and installation are more difficult than the latter. Usually the installation costs range from a few thousand to over ten thousand yuan. Its call effect is relatively good, even in the compartment with large shielding and electromagnetic interference, it can still maintain an excellent call effect. According to reports, the received signal performance of this type of car phone is 25% higher than that of the mobile phone to which the wireless headset is connected. In combination with a dedicated car antenna, it can maintain a clear call effect even in the extremely weak signal environment of many mobile phones. At the same time, it can also be switched automatically with the car audio system. That is to say, once the phone arrives, the original music in the car stereo will be suspended.

Pickup type wireless headphones

The principle of this kind of telephone is very simple. It uses the mobile phone of the owner to receive the communication signal, and then uses the pickup to collect the sound of the mobile phone and plays it through the on-board broadcasting system or the car stereo. The owner wears a wireless headset to answer the sound. Professionals have a phrase to describe such wireless headphones: "On the car is the car, get off the phone," it is very lively. The main part uses a cigarette lighter as a socket. After installation, the device terminal will automatically switch to the hands-free mode, and the connection will be connected with the headphone jack of the mobile phone. This type of car phone installation is very simple, no professional installation, it can be said to be ready-to-use, and thus the price is much cheaper than the car fixed telephone system, the market price of 300 yuan to 700 yuan range. At the same time, its control of electromagnetic radiation is relatively less than that of a fixed-line telephone system. Therefore, the sound quality and the audibility are not as good as those of the latter.

"Gravity Die Casting. A permanent mould casting process, where the molten metal is poured from a vessle of ladle into the mould, and cavity fills with no force other than gravity, in a similar manner to the production of sand castings, although filling cn be controlled by tilting the die."

Gravity Die Casting

Sometimes referred to as Permanent Mould, GDC is a repeatable casting process used for non-ferrous alloy parts, typically aluminium, Zinc and Copper Base alloys.

The process differs from HPDC in that Gravity- rather than high pressure- is used to fill the mould with the liquid alloy.

GDC is suited to medium to high volumes products and typically parts are of a heavier sections than HPDC, but thinner sections than sand casting.

There are three key stages in the process.

  1. The heated mould [Die or Tool] is coated with a die release agent. The release agent spray also has a secondary function in that it aids cooling of the mould face after the previous part has been removed from the die.
  2. Molten metal is poured into channels in the tool to allow the material to fill all the extremities of the mould cavity. The metal is either hand poured using steel ladles or dosed using mechanical methods. Typically, there is a mould [down sprue" that allows the alloy to enter the mould cavity from the lower part of the die, reducing the formation of turbulence and subsequent porosity and inclusions in the finished part.
  3. Once the part has cooled sufficiently, the die is opened, either manually or utilising mechanical methods.

Advantages

  • Good dimensional accuracy
  • Smoother cast surface finish than sand casting
  • Improved mechanical properties compared to sand casting
  • Thinner walls can be cast compared to sand casting
  • Reverse draft internal pockets and forms can be cast in using preformed sand core inserts
  • Steel pins and inserts can be cast in to the part
  • Faster production times compared to other processes.
  • Once the tolling is proven, the product quality is very repeatable.
  • Outsourced Tooling setup costs can be lower than sand casting.

Gravity Casting Parts

Gravity Casting Parts,Aluminum Alloy Gravity Casting Parts,Aluminum Gravity Die Casting Parts,Gravity Casting Aluminum Parts

HSI INDUSTRIEL LTD , https://www.hsiindustriel.com