| 摘要 |
<p>The procedure for making a seal (10) containing a rigid or semi-rigid U-section core (3) with two sides (3a, 3b) and a supple seal lip (7) consists of injecting the core in a mould (M) with its two sides at an angle that is greater than the final angle as the core material shrinks on cooling. The procedure for making a seal (10) containing a rigid or semi-rigid U-section core (3) with two sides (3a, 3b) and a supple seal lip (7) consists of injecting the core in a mould (M) with its two sides at an angle that is greater than the final angle as the core material shrinks on cooling. The initial angle or the core arms is between 0.5 and 20 degrees greater than the final angle, depending on the material used and the geometry of the core, which has at least one inward projecting stud or lip (12) made from a supple thermoplastic material. The core and supple outer lip are made from thermoplastic and elastomer materials that adhere together without the need for an adhesive layer.</p> |
