METHOD AND APPARATUS FOR MANUFACTURING MOLDED PRODUCT HAVING CONSTANT CROSS-SECTIONAL PATTERN

摘要

A method of making a molded product having cross-sectional patterns that appear in the same shape at any cross-section, and a device used for embodying said method, wherein a periphery forming material and pattern forming material are fed to the discharge port through a plurality of cylindrical flow passages enlarged at respective middle portions, and the pattern forming material flowing into the pattern forming cylindrical bodies is interrupted at the side of the shaft center while dispersed toward the circumference. Thus, even in a product having a pattern fine and sharp at cornes, the pattern forming material fully spreads to the acutely angled corners and a clear pattern can be obtained.