| 摘要 |
<p>An adjustable sealing system for use in a molding apparatus is disclosed. The molding apparatus is used for applying a coating of polymeric material to the surface of a shell (1). The molding apparatus includes a molding surface (8) and a seal groove (9) adapted for retaining a seal. The molding apparatus is capable of receiving a shell (1) and forming a molding cavity between a surface (4) of a shell (1) and the molding surface (8). The seal establishes sealed contact between the shell (1) and the molding surface (8) when the molding apparatus is closed. The adjustable sealing system (17) includes a seal (23) for insertion and retention in a seal groove (9) of the molding apparatus, so that a portion of the seal (23) extends from the seal groove (9) to a selected height when the molding apparatus is open. A seal height adjustment means (19) is disposed under the seal (23) in the seal groove (9). The seal height adjustment means (19) is capable of adjusting the height of the seal above the seal groove (9) to correspond to a particular contour of a shell (1) being molded. The shell (1) establishes contact with the seal (23) forming a sealed molding cavity between the shell (1) and the receptacle's molding surface (8). The seal's height adjustment means (19) may include a shaped polymeric, wooden, metallic, or plastic shims; threadably adjustable shims; selectively sized ball bearings for placement between the shims; or a tubular expandable shim which may be inflated with a fluid under pressure for supporting the seal.</p> |
