US2013106016A1PendingUtilityA1

Method for attaching thin cylindrical element to mold core, process for producing cylindrical container, and mold core

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Assignee: ICHIKAWA TORUPriority: Mar 16, 2010Filed: Mar 15, 2011Published: May 2, 2013
Est. expiryMar 16, 2030(~3.7 yrs left)· nominal 20-yr term from priority
Inventors:Toru IchikawaKoki AbeShoso NishidaKenji Kikukawa
B29C 45/14598B29C 33/0016B29C 45/14622B29K 2667/003B29C 45/14467B29C 45/43B29L 2023/00B29K 2705/02B29K 2623/065B29C 31/002B29L 2031/712B29C 45/14008B29C 45/14065B29C 2045/14057B29C 45/14811
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Claims

Abstract

The method for attacking a thin cylindrical element to a mold core is a method for attaching a film-like thin cylindrical element, which is formed in a cylindrical shape having a constant cross-sectional shape, to an outer surface of a mold core in a manner so as to cover the mold core. The method includes pressing the thin cylindrical element onto a tip portion of the mold core; guiding the thin cylindrical element to the base end side of the mold core while ejecting gas into between the mold core and the thin cylindrical element; and attaching the thin cylindrical element to the outer surface of the mold core in a manner so as to cover the mold core.

Claims

exact text as granted — not AI-modified
1 . A method for attaching a thin cylindrical element to a mold core, in which a film-like thin cylindrical element, which is formed in a cylindrical shape having a constant cross-sectional shape, is attached to an outer surface of a mold core in a manner so as to cover the mold core, the method comprising:
 pressing the thin cylindrical element onto a tip portion of the mold core;   guiding the thin cylindrical element to a base end side of the mold core while ejecting gas into between the mold core and the thin cylindrical element; and   attaching the thin cylindrical element to the enter surface of the mold core, in a manner so as to cover the mold core.   
     
     
         2 . The method for attaching a thin cylindrical element to a mold core according to  claim 1 , wherein
 the mold core is formed in a rod-like body having a constant outer circumferential length, and the outer circumferential length is set to be greater than or equal to an inner circumferential length of the thin cylindrical element.   
     
     
         3 . The method for attaching a thin cylindrical element to a mold core according to  claim 1 , wherein
 an outer diameter of the mold core is set so as to become maximized at at least a base end of the mold core.   
     
     
         4 . The method for attaching a thin cylindrical element to a mold core according to  claim 1 , wherein
 an outer surface of the tip portion of the mold core is formed with a gas ejection hole, and gas is ejected into between the mold core and the thin cylindrical element from the gas ejection hole.   
     
     
         5 . The method for attaching a thin cylindrical element to a mold core according to  claim 4 , wherein
 the outer surface of the tip portion of the mold core is formed with a groove portion, and the groove portion is formed with the gas ejection hole.   
     
     
         6 . The method for attaching a thin cylindrical element to a mold core according to  claim 1 , wherein
 the tip portion of the mold core is provided with an inducing portion that facilitates pressing the thin cylindrical element.   
     
     
         7 . The method for attaching a thin cylindrical element to a mold core according to  claim 6 , wherein
 the inducing portion is a chamfered portion formed at the tip portion of the mold core.   
     
     
         8 . The method for attaching a thin cylindrical element to a mold core according to  claim 6 , wherein
 the inducing portion is a separate body core that is attached to the tip portion of the mold core and has an outer diameter less than the outer diameter of the mold core.   
     
     
         9 . A process for producing a cylindrical container using the method for attaching a thin cylindrical element to a mold core according to  claim 1 . 
     
     
         10 . A mold core in which a film-like thin cylindrical element, which is formed in a cylindrical shape having a constant cross-sectional shape, is attached to an outer surface thereof in a manner so as to cover the mold core, wherein
 the mold core is formed in a rod-like body having a constant outer circumferential length, the outer circumferential length is set to be greater than or equal to an inner circumferential length of the thin cylindrical element, and an outer surface of a tip portion of the mold core is formed with a gas ejection hole to eject gas.   
     
     
         11 . The mold core according to  claim 10 , wherein
 the outer surface of the tip portion is formed with a groove portion, and the groove portion is formed with the gas ejection hole.   
     
     
         12 . The mold core according to  claim 10 , wherein
 the tip portion of the mold core is formed with an inducing portion that facilitates pressing the thin cylindrical element.

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