| 摘要 |
<p>The present invention relates to a pneumatic hammer or de- coring vibrator (2) for de-coring of foundry castings. The hammer (2) comprises: a jacket (3), in turn comprising: an inner chamber (32); an inlet circuit (4) for the entry of compressed air, and an outlet circuit (5) for the exit of compressed air. The hammer further comprises a motion mechanism (7) for generating a vibratory motion under the action of compressed air; said mechanism being arranged within the inner chamber (32) of the jacket (3); and a punch or beater (6), connected to said motion mechanism ( 7 ), for coming into contact with the casting to be subjected to de-coring. The jacket (3) of said hammer is made of an alloy comprising aluminium, silicon and magnesium.</p> |
