| 摘要 |
This invention provides a bulk-density measuring device and measuring method. Said device, which measures the bulk density of pre-expanded particles, is characterized by the provision of the following: a vessel (A), the pressure inside which can be brought below atmospheric pressure so as to un-shrink, i.e. enlarge, pre-expanded particles that have shrunk; a vessel (B) that, with the pressure thereinside brought below atmospheric pressure, can be filled with pre-expanded particles that have been enlarged in the other vessel (A), thereby measuring out a given volume of said particles; a pressure-reducing means (8) that can adjust the pressure inside each vessel (A and B) to below atmospheric pressure; and a scale (6) that can weigh the pre-expanded particles filling the latter vessel (B). Using this bulk-density measuring device and measuring method, the original bulk density of pre-expanded particles, which are prone to shrinking immediately after manufacture, can be measured stably and quickly after manufacture, allowing immediate feedback with respect to operating conditions for the next production batch. |
