| 摘要 |
An apparatus for encapsulating an article within a plastic foam material, such as polyurethane, wherein the article to be packaged is placed within a mold cavity of an adjustable mold, the walls of the mold are adjusted according to the size of the article and a liquid polymeric-isocyanate mix is injected into the mold cavity and allowed to react to form an insoluble, flexible, polyurethane foam which completely encapsulates the article. After the urethane has set, the mold walls are retracted and the encapsulated article is removed. The apparatus consists of a mold form having a baseplate and four upstanding movable sidewalls which define a mold cavity. Each upstanding wall is movable with respect to the other walls thereby to allow for a wide variation in the size of the mold cavity to accommodate wide variations in article size. In addition, a plurality of similar mold forms are provided to rotate on a carousel about a central, liquid polymeric-isocyanate distribution system so that after the liquid has been injected into a mold, the mold may be moved away and the polyurethane allowed to set while liquid is injected into the remaining molds. In this manner, a continuous production line operation may be maintained.
|
