Methods and arrangements for continuous manufacture of building panels

A continuous press arrangement for manufacture of building panels, comprising:

• an upper rotatable inlet drum connected to an upper rotatable outlet drum via an upper continuous press belt;
• a lower rotatable inlet drum connected to a lower rotatable outlet drum via a lower continuous press belt, said upper and lower continuous press belts configured to form a product path therebetween for feeding a product in a feeding direction in response to rotation of one or more of said drums;
• an upper table and a lower press table each comprising a displaceable pressure cushion extending along at least a portion of said product path and configured to facilitate a pressure zone between said press table and a respective one of the upper and lower continuous press belts, wherein said press table comprises a displacement groove and said pressure cushion is configured to be at least partially received in said displacement groove, wherein said pressure cushion comprises a friction seal element configured to be in contact with the respective one of the upper and lower continuous press belts,
• wherein said pressure cushion comprises a seal frame configured to be received in said displacement groove, wherein the seal frame is connected to a seal member configured to seal against the pressure applied to said displacement groove, and wherein the seal member comprises a substantially U-shaped cross-section which is upwards open towards an inner wall of the displacement groove.