| 摘要 |
<p>An all polypropylene hammer with a hollow moulded handle (2) and head (1), the head filled with lead shot (7) and closed with a plug (1,6). The striking faces of the head are removable cup shaped components (3,4) which may be selected for the work in hand. The head has vent holes to accommodate heating and cooling of the lead shot, a guide slot to facilitate cutting an old striking face off and a steel washer (5,6) can reinforce the cup. Additional lead shot can be contained in the head end of the handle. The hammer is made in an automated injection die casting cycle and the shot, plug and striking face cups added afterwards.</p> |
