Category:Complex analysis
Category:Complex variablesThe present invention is directed to a method and apparatus for the molding of multi-piece shells for various uses. In particular, the present invention is directed to a method and apparatus for the molding of multi-piece shell which does not require the use of adhesives, or other extraneous materials, to join the various shell pieces together. In addition, the present invention is directed to a method and apparatus for the molding of multi-piece shell which is completely within the shell mold.
In the molding of multi-piece shells, especially a cylindrical shell, it is desirable to be able to machine the interior and exterior of the shell during its formation. In the past, it has been difficult, if not impossible, to accomplish this objective because the interior and exterior of the shell are typically formed of different materials. More particularly, the interior is typically molded of a harder, tougher material and the exterior is typically molded of a softer, more flexible material. As a result, the interior and exterior have been molded using different methods and the resulting shells have not been completely satisfactorily joined together.
One method of joining together the interior and exterior of a multi-piece shell is to mold a material, such as an adhesive or adhesive-like material, within the shell mold and to allow the adhesive to set up, thus joining the interior and exterior of the shell. However, such methods can require substantial time to set up the adhesive within the shell mold and require the use of complex molds which allow for the molding of the adhesive as well as the molding of the shell. Such molds, when used, must also be designed to allow the molding of the shell and the adhesive in the same chamber of the mold.
Another method is to form an adhesive-receiving receptacle within the shell mold and to inject a liquid adhesive through an injection nozzle into the receptacle. This method is even less desirable because it requires the use of an adhesive having a suitable application temperature.
In addition to the problems discussed above, because the interior and exterior of the shell are typically molded using different molding techniques and are formed of different materials, the exterior and interior of the shell are not bonded together and are therefore free to move relative to each other during operation of the shell. Accordingly, it is desirable to be able to join together the interior and exterior of the shell using a technique which is independent of the molding technique used to mold the ac619d1d87
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