| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a repeatable and adjustable method capable of controlling the thermoforming of a foam blank. <P>SOLUTION: A vacuum forming device 40 for deforming a forming blank 16 is disclosed. This device 40 includes a die 22, and at least one regulator bag 42 disposed adjacent to the die 22. The regulator bag 42 includes a sealed bag with an outer part and an inner part having a first volume, and a passage defined from the inner part to the outer part of the regulator bag 42. The passage is configured so that the regulator bag 42 has a first contraction speed whereby the sealed bag retreats from a first volume to a second volume over a given time during the outer part of the sealed bag is under constant reduced pressure. The device 40 also includes a vacuum film 46 connected to the die. The vacuum film 46 is configured to form a forming blank 16 and a vacuum space 48 sealing at least one regulator bag 42 therein. <P>COPYRIGHT: (C)2013,JPO&INPIT |
