ISO 3537 Roadvehicles Safety glazing materials Mechanical tests Clause 10 Head-formtest
Principle:Assessment of the minimum strength and cohesion of the safety glazing materialunder impact from a blunt, bulky object. If required, tests can be performed onwhole windscreens.
The purpose ofthis test is to verify the compliance of glazing with the asking relating tothe limitation of injury in the event of impact of the head against thewindscreen, laminated glass and glazing of glass-plastic and rigid plasticother than windscreens, together with The double-glazed units used in the sidewindows.
Impact height:< 1.5m
Felt hat:90g/89mm Thickness:5mm
Head-form weight,with a spherical or semi-spherical head made of laminated hard wood coveredwith replaceable felt and without a cross-beam made of wood. Between thespherical part and the cross-beam, there is a neck-shaped intermediate pieceand on the other side of the cross-beam, a mouning rod.
The total massof the apparatus shall be 10 kg0.2 kg
for testing flattest piece, the fixture is composed of two steel frames, with machined edges,50mm wide, fitting one over the other and faced with rubber gaskets 3mm0,5mmthick and 15mm1mm wide, of hardness 70 IRHD.
The upper frameis pressed against the lower frame by at least eight bolts. The support shallrest on a rigid stand with a sheet of rubber, of hardness 70 IRHD and 3mm0,5mmthick, placed in between.