| 摘要 |
<p>PURPOSE:To easily and positively fix a shock absorbing member by welding the shock-absorbing member made of a synthetic rubber including propylene to the outer periphery of a lamp-housing made of polypropylene by an ultrasonic welding while the shock-absorbing member is pressed against the above lamp- housing by using a ring-shaped tool-horn which can be rotated. CONSTITUTION:A shock-absorbing member 2 made of a synthetic rubber is fixed to the outer periphery of a lamp-housing 1a made of polypropylene. In this case, the synthetic rubber used for the shock-absorbing member 2 includes propylene. The shock-absorbing member 2 is pressed against the lamp-housing 1a by a ring-shaped tool-horn 7. Then, the shock-absorbing member 2 is fixed to the lamp-housing 1a by a continuous ultrasonic welding while the tool-horn is rotated. Thus, the shock-absorbing member 2 can be easily and efficiently fixed with uniform strengths, without using toxic chemicals and without damaging the appearance.</p> |
