Disclosed are an apparatus for fabricating a lens. The apparatus for fabricating a lens includes a molding frame to receive a source material injected through an injection port, and a light source or a heat source to irradiate a light or a heat onto the source material in the molding frame. The molding frame includes a plurality of molding grooves adjacent to each other and at two connection passages to connect the molding grooves to each other.

A compression molding die includes a first mold and a second mold. The first mold includes a bottom surface member and a side surface member. A space is providable in the first mold by a step of at least one of an outer peripheral surface of the bottom surface member and an inner peripheral surface of the side surface member. The first mold includes a gas inlet capable of introducing gas into the space, a gas outlet through which the gas introduced into the space is dischargeable, and a seal member below the space.

A method for production of molded parts, in particular parts consisting of a fiber composite material, is illustrated and described. In order to reduce the load on the membrane, the membrane according to the invention can be slipped past the seal and the membrane can at least in part be slipped past the seal as a result of the expansion force.