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An Experimental Study on The Removal of Weldline by Moving Core Method
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 Title & Authors
An Experimental Study on The Removal of Weldline by Moving Core Method
Yun, Gyeong-Hwan; Jo, Gwang-Hwan;
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 Abstract
Injection molding is one of the most popular processes in plastic industry. Despite the significant progresses in technical point of view there are still problems to be solved in injection molding process. One of these problems is well-known weldline. A weldline is formed when the two flow front seperates and rejoins during the filling process. The flow front separation is caused by an obstruction in the cavity such as core, inserts and multiple gates. The typical occurrence of weldlines is one of the most undesirable phenomena in injection molding because the molded product's appearance is damaged and its strength is reduced considerably. A major factor which weakens the strength is the V-notch structure in its surface and parallel molecular orientation in inner structure. Several methods were tried to remove the weldline in injection-molded parts, but in fail. In the present paper a new technique to remove the weldline is proposed. This technique is named as ,'moving core method
 Keywords
Moving Core;Weldline;Frozen Layer;
 Language
Korean
 Cited by
1.
모조 러너를 이용한 계기판 사출성형의 게이트 위치 설계,한경희;최두순;김홍석;임용택;

대한기계학회논문집A, 2001. vol.25. 10, pp.1575-1582 crossref(new window)
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