Release devices and printing apparatuses

A printing apparatus, comprising:

• a release device, wherein the release device comprises a fixing member, a release film, a support plate, a soft rubber ring and an exhaust device, the fixing member is arranged to be fixed to the release film;
• the soft rubber ring is arranged between a bottom surface of the release film and a top surface of the support plate at peripheries of the release film and the support plate, a cavity is enclosed by the release film, the support plate and the soft rubber ring together, wherein the cavity is defined within the peripheries of the release film and the support plate, wherein the soft rubber ring is arranged about the peripheries of the release film and the support plate,
• wherein the support plate is provided with a first through hole, wherein the first through hole is arranged in the periphery of the support plate, and wherein the exhaust device is connected to communicate with the cavity through the first through hole provided in the periphery of the support plate;
• a resin vat housing, wherein the resin vat housing is arranged at a top surface of the release device, and the resin vat housing is connected to the fixing member of the release device via a first plurality of bolts;
• and
• a working platform, wherein the working platform is arranged at a bottom surface of the release device, and the working platform is fixedly connected to the resin vat housing via a second plurality of bolts;
• wherein the fixing member comprises a first fixing plate, a second fixing plate, and a third plurality of bolts, and
• wherein the first fixing plate and the second fixing plate are arranged opposite to each other, the first fixing plate is arranged at a top surface of the release film, the support plate is arranged at a bottom surface of the soft rubber ring and at a top surface of the second fixing plate, and the first fixing plate is fixed to the second fixing plate via the third plurality of bolts.