| 摘要 |
<p>Disclosed is a method of removing voids from a molded product, in which a main mold, in which a product is molded, is connected with an auxiliary mold, and molten material in the auxiliary mold moves toward the main mold by adjusting a cooling time between the main mold and the auxiliary mold, thereby preventing voids from occurring in the middle portion of the molded product having a large thickness or various thicknesses, preventing sink marks from occurring at the molded product having a small thickness, and enhancing mechanical rigidity and reliability of the molded product. The method includes the steps of: preparing a main mold by which a product to be molded is molded and an auxiliary mold connected with the main mold; introducing molten resin into the auxiliary mold and the main mold; and retarding cooling of the auxiliary mold such that negative pressure in the auxiliary mold is different from that in the main mold due to a cooling time difference and a temperature difference. The molten resin in the auxiliary mold moves toward the main mold, and then is filled in the main mold in which the voids occur during the cooling.</p> |
