An operator puts the mold under the pressing head of the demolding device that presses the lid handle after a bi-manual control has been pushed. After pressing the operator uses a knee control push button and leaves the bi-manual one; in this way he will be able to distance the lid arms from the mold. The operator, leaving the knee push button, causes the pressing head return and the consequent lid release. He will have only to distance the lid and to overturn the mold to extract the product. The productivity is about 100-120 molds/hour.