Apparatus and method for release of additively manufactured products and build platform

An additive manufacturing apparatus for manufacturing a product comprising:

• a container for holding a radiation-curable liquid,
• a build platform having a build surface for holding a product being manufactured during a manufacturing process, the build platform being movable relative to the container in a predetermined direction,
• a radiation source for providing hardening radiation to selectively solidify radiation-curable liquid in the container by exposure to form the product,
• at least one temperature element being integrated in the build platform and being adapted to generate and/or remove heat from the build surface and/or the product,
• a controller configured to cause the at least one temperature element to generate or remove an amount of heat from the build surface or from the product, the amount of heat at least being sufficient for causing the product to release from the build surface due to tension induced due to a difference in a thermal expansion property of the build surface and a thermal expansion property of the product.