bath 9 heats up and communicates the calories necessary for melting or at least softening the plastic matter 10 the power of the resistor r is of course determined so that the bath 9 attains the temperature of softening of the matter 10 provided to be around 60 u00b0 to 70 u00b0 c after a certain time indicated by the notice for use the plastic matter 10 is softened and it may be used for making molded objects to that end lid 4 is opened which causes basket 3 to pivot upwardly thanks to the action of spring 8 when the lid is open bar 4 comes beneath the edge of shell 5 and hook 5f engages in notch 6b so that the basket is locked in raised position this locked position makes it possible to take the molten matter 10 without the possibility of re immersing basket 3 with the result that the user cannot be burnt in the bath 9 with the basket in this locked position it constitutes a protective screen preventing access to the hot bath 9 any appropriate material may of course be used for making the device according to the invention plastic materials whose qualities respond to the desired resistance of the different components of the device are preferably.