| 摘要 |
PURPOSE:To enable a product of continuous length to be molded by standing vertically both side walls of vacuum chambers faced each other and by forming an opening to be closed with a plate. CONSTITUTION:When the size of a product to be molded is larger than the volume of one vacuum chamber 12, multi-numbers of vacuum chambers 12 are set in a line depending on the size of the product in such a way that the side walls vertically standing each other should tightly contact and be connected each other through openings 28. After a mold for casting is placed in the multi- numbers of vacuum chambers 12 being combined, plates 30 are set on both outer side walls 26 of both ends of the vacuum chamber 12 and a vacuum pump P is thereafter moved. Air in the vacuum chamber 12 is thereby evacuated through an opening 16 and the plates 30 are thereby tightly adhered on the side walls 26 and a required degree of vacuum can be achieved. Then, a valve device 40 of a guide pipe 38 is opened and a supplying guide pipe 36 is recovered from a closing state. At the same time, a liquid plastic raw material is sucked into a casting mold and cured in it to become a product.
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