17-11-2016 дата публикации
Номер: US20160332349A1
Принадлежит:
Methods of making molded objects, such as composite ammunition casings for firearms, are disclosed. Apparatus for performing methods of making molded objects, such as composite ammunition casings for firearms, are also disclosed. Molded objects, such as composite ammunition casings for firearms, are further disclosed. 1. A method of making a composite ammunition casing , said method comprising:overmolding a removable core mandrel with at least one polymer or polymer-forming material, the at least one polymer or polymer-forming material forming a polymer shell in contact with an outer profile surface of the removable core mandrel; andseparating the removable core mandrel from the polymer shell to form the composite ammunition casing;{'sub': omi', 'omf', 'o', 'omi', 'o', 'omf, 'wherein said separating step comprises (i) reducing a cross-sectional outer mandrel dimension of the removable core mandrel from an initial cross-sectional outer mandrel dimension dto a final cross-sectional outer mandrel dimension dso that the removable core mandrel passes through an internal opening within the polymer shell, the internal opening having a cross-sectional opening dimension dwith d>d≧d.'}216-. (canceled)17. The method of claim 1 , further comprising:placing one or more mold inserts into a mold along with the removable core mandrel, the mold being sized to surround (i) at least a portion of the removable core mandrel, and (ii) at least a portion of each of the one or more mold inserts, wherein at least one mold insert comprises at least one ejection insert sized to extend over one end of the removable core mandrel.18. The method of claim 1 , further comprising:placing one or more mold inserts into a mold along with the removable core mandrel, the mold being sized to surround (i) at least a portion of the removable core mandrel, and (ii) at least a portion of each of the one or more mold inserts, wherein at least one mold insert comprises at least one metal bushing.19. (canceled) ...
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