Air Bag Manufacturing Process
AIR BAG MANUFACTURING
PROCESS
Muhammad Junaid Ali
11-14-11
Group :: 5
Background
• An air bag is an inflatable cushion designed to protect automobile occupants from serious injury in the case of a collision
• Air bag is designed to supplement the protection offered by seat belts which are needed to hold occupant securely in place especially in side impacts, rear impacts, and rollovers.
• Upon detecting a collision, air bags inflate instantly to cushion the exposed occupant with a big gasfilled pillow
• An air bag consists of an air bag module (containing an inflator or gas generator and an air bag), crash sensors, a diagnostic monitoring unit, a steering wheel connecting coil, and an indicator lamp.
Raw materials
• An air bag module has three main parts: the air bag, the inflator, and the propellant. The air bag is sewn from a woven nylon fabric and can come in different shapes and sizes depending on specific vehicle requirements.
The driver's-side air bag material is manufactured with a heat shield coating to protect the fabric from scorching, especially near the inflator assembly, during deployment. • Talcum powder or corn starch is also used to coat the air bag; either substance prevents the fabric from sticking together and makes it easier to assemble. Newer silicone and urethane coated air bag materials require little or no heat shield coating, although talcum powder or corn starch will probably still be used as a processing aid.
• The inflator canister or body is made from either stamped stainless steel or cast aluminum.
Inside the inflator canister is a filter assembly consisting of a stainless steel wire mesh with ceramic material sandwiched in between. When the inflator is assembled, the filter assembly is surrounded by metal foil to maintain a seal that prevents propellant contamination.
• The propellant, in the form of black pellets, is primarily sodium azide combined with an oxidizer and is typically located inside the inflator canister
PROCESS
Muhammad Junaid Ali
11-14-11
Group :: 5
Background
• An air bag is an inflatable cushion designed to protect automobile occupants from serious injury in the case of a collision
• Air bag is designed to supplement the protection offered by seat belts which are needed to hold occupant securely in place especially in side impacts, rear impacts, and rollovers.
• Upon detecting a collision, air bags inflate instantly to cushion the exposed occupant with a big gasfilled pillow
• An air bag consists of an air bag module (containing an inflator or gas generator and an air bag), crash sensors, a diagnostic monitoring unit, a steering wheel connecting coil, and an indicator lamp.
Raw materials
• An air bag module has three main parts: the air bag, the inflator, and the propellant. The air bag is sewn from a woven nylon fabric and can come in different shapes and sizes depending on specific vehicle requirements.
The driver's-side air bag material is manufactured with a heat shield coating to protect the fabric from scorching, especially near the inflator assembly, during deployment. • Talcum powder or corn starch is also used to coat the air bag; either substance prevents the fabric from sticking together and makes it easier to assemble. Newer silicone and urethane coated air bag materials require little or no heat shield coating, although talcum powder or corn starch will probably still be used as a processing aid.
• The inflator canister or body is made from either stamped stainless steel or cast aluminum.
Inside the inflator canister is a filter assembly consisting of a stainless steel wire mesh with ceramic material sandwiched in between. When the inflator is assembled, the filter assembly is surrounded by metal foil to maintain a seal that prevents propellant contamination.
• The propellant, in the form of black pellets, is primarily sodium azide combined with an oxidizer and is typically located inside the inflator canister