Emergency measures for toughened glass
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-Time:2019-08-29 09:28
1. Safety thump: An auxiliary escape tool in a closed cabin. It is usually installed in closed cabins such as automobiles where it is easily accessible. In emergencies such as fire or falling into water, it is easy to take out and smash windows and doors to escape smoothly.
Usage: Mainly used for breaking glass to escape in emergencies, hammer to knock glass, handle tail blade to cut safety belt to escape.
2. Scope: Mainly used for bus, passenger vehicle, train and other vehicle configuration.
Usage: Safety hammer mainly uses its conical tip. Because the contact area of the tip is very small, the pressure of the contact point on the tempered glass (not the pressure, but the pressure per unit area) is quite large when the glass is smashed with the hammer. This is similar to the principle of the thumbtack. The film is easily punctured and the car is made. Glass is slightly cracked by a great external force at this point. For tempered glass, a little cracking means that the stress distribution in the whole glass is destroyed, which results in numerous spider-web cracks in an instant. At this time, glass fragments can be removed by a few smashes with a hammer.
In addition, the middle part of tempered glass is the strongest, and the corner and edge are the weakest. The best way is to hit the edges and corners of the toughened glass with a safety hammer, especially in the middle of the upper edge of the glass. Once the tempered glass is cracked, it is easy to smash the whole glass.
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