Process and apparatus for the production of plastic objects
AssigneeLinde Aktiengesellschaft
InventorDieter Rebhan
Life of this patent
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Abstract
A process and apparatus is provided for explosively forming plastic objects from shredded plastic such as recycled plastic having different compositions. The shredded plastic and an explosive gas mixture is introduced into a mold cavity having the shape of the object to be formed, and the gas mixture is ignited, generating sufficient heat and pressure to force the plastic to conform to the shape of the mold cavity. The temperature and pressure in the mold cavity is controlled during the explosion by releasing combustion gases from the mold cavity.
Claims22
A process for the production of plastic objects from shredded plastic, comprising:
- introducing shredded plastic into a mold cavity corresponding to the shape of the object to to be produced and then closing the mold;
- introducing an explosive, combustible gas/oxygen gaseous mixture into the closed, loaded mold, and igniting the gaseous mixture, thereby generating sufficient heat and pressure from the combustion gases to bake and fuse together plastic grains in at least a portion of the shredded plastic and form a stable plastic object in the shape of the mold cavity;
- and controlling the temperature and pressure in the mold cavity by releasing combustion gases from the mold cavity during the explosion.
A process for the production of plastic objects from recycled plastic which can comprise one or more types of plastic, the process comprising mixing the shredded plastic with an explosive mixture of gases in a mold cavity;
- detonating the explosive mixture to release sufficient heat to bake and fuse together plastic grains in at least a portion of the shredded plastic and form a plastic object in the shape of the mold cavity;
- and controlling the temperature and pressure in the mold cavity by releasing combustion gases from the cavity during the explosion.
An apparatus for the explosive forming of plastic articles from shredded plastic, comprising:
- a mold having a source of combustible gas mixture in communication with the mold cavity;
- means permeable to gas but not solide in communication with the mold cavity;
- pressure release means in communication with the mold cavity for venting excess combustion gases from the mold cavity and for controlling the temperature and pressure of the mold cavity during an explosion in the mold;
- and
- ignition means for igniting the explosion of the combustible gas mixture.
Dependencies are inferred from the claim text.