| 摘要 |
<p>Such comprises surrounding the corebox (2), to establish a workable chamber (14) between the blowing cartridge (4) and the table (1), and a tight seal on such elements, with a bell (9) fitted with a connection (13) to a vacuum pump, so that prior to the valve (6) opening, .which causes the blowing cartridge (4) to discharge into (15) the corebox (2), inside the latter, through the classic holes (8) expelling the air and likewise through the surrounding chamber (14), a depression or vacuum is provided which considerably enhances the discharge of the blowing cartridge (4), allowing the latter to be effected even in highly complex or sizeable cores, without having to use special blowing nozzles or heads, viz. allowing the use of a universal blowing nozzle (5) for all cases, without there being a risk of the sand/binder mixture not reaching remote areas of the corebox (2). <IMAGE></p> |
