BARREL OF WRITING UTENSIL

PROBLEM TO BE SOLVED: To solve troubles such as the deformation of a molded product at its ejection, uneven wear of a mold or the like at the molding of the barrel 10 of a writing utensil having a slant ejecting surface by injection molding plastic. SOLUTION: In the barrel 10 of the writing utensil...

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Bibliographische Detailangaben
1. Verfasser:	SUMITOMO HAJIME
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING BUREAU ACCESSORIES IMPLEMENTS FOR WRITING OR DRAWING INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES PERFORMING OPERATIONS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL WRITING OR DRAWING IMPLEMENTS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To solve troubles such as the deformation of a molded product at its ejection, uneven wear of a mold or the like at the molding of the barrel 10 of a writing utensil having a slant ejecting surface by injection molding plastic. SOLUTION: In the barrel 10 of the writing utensil molded by injection molding plastic, at least one end of the barrel comprises an axially slanting surface 21 and the arithmetic mean roughness (Ra) of the surface of the slanting surface 21 is ≥10 and ≤70 μm under the condition that the barrel has a portion, the inner diameter and outer diameter of which expand themselves towards this one end of the barrel. COPYRIGHT: (C)2009,JPO&INPIT