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Priority to JP9622587UpriorityCriticalpatent/JPS641916U/ja
Publication of JPS641916UpublicationCriticalpatent/JPS641916U/ja
B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
B29C45/17—Component parts, details or accessories; Auxiliary operations
B29C45/40—Removing or ejecting moulded articles
B29C45/44—Removing or ejecting moulded articles for undercut articles
B29C45/4421—Removing or ejecting moulded articles for undercut articles using expansible or collapsible cores