Method and device for the production of a biodegradable hollow body with a connection element

Abstract

The invention relates to a method and a device for producing a receptacle with a hollow body (1) made of fiber material and having an opening (2) and with a connection element (3) arranged on the hollow body and surrounding the opening (2). The object of the invention is to provide a method with a short process duration and a low energy input. The method comprises the following method steps:providing a split suction mold (4) with a porous wall (5) which, in the closed state, encloses at least one cavity (6) with a mold opening (7);arranging the connection element (3) on a holding device (8) and insertion of the holding device (8) into the cavity (6) of the suction mold (4) in such a way that the holding device (8) protrudes through the mold opening (7) and holds the connection element (3) in the mold opening (7);closing of the split suction mold (4) and suction of fiber material from a pulp (13) through the wall (5) of the suction mold (4), so that a hollow body (1) is formed between the holding device (8) and the wall (5);compacting the hollow body (1) with the connection element (3) arranged thereon; anddrying the hollow body (1).To enable reliable handling of the hollow body, the hollow body (1) is removed on the holding device (8) from the split suction mold (4).

1 . A method for producing a receptacle including a hollow body made of fiber material, an opening, and a connection element arranged on the hollow body and surrounding the opening, wherein producing the receptacle includes:
 providing a split suction mold with a porous wall, wherein when the split suction mold is in a closed state, the porous wall encloses at least one cavity with a mold opening;   arranging the connection element on a holding device;   inserting the holding device into the at least one cavity of the split suction mold, wherein the holding device protrudes through the mold opening and holds the connection element in the mold opening;   forming the hollow body between the holding device and the porous wall by closing the split suction mold and sucking fiber material from a pulp through the porous wall of the suction mold;   compacting the formed hollow body with the connection element;   drying the hollow body; and   removing the hollow body on the holding device from the split suction mold.   
     
     
         2 . The method of  claim 1 , further comprising sucking the pulp through the holding device into the at least one cavity of the split suction mold, wherein the holding device is hollow. 
     
     
         3 . The method of  claim 1 , further comprising transporting the hollow body on the holding device into a transfer mold complementary to the hollow body or a split press mold. 
     
     
         4 . The method of  claim 1 , further comprising pivoting the holding device around a section of the holding device protruding out of the at least one cavity. 
     
     
         5 . The method of  claim 1 , further comprising compacting the hollow body in the split suction mold and/or a split press mold. 
     
     
         6 . The method of  claim 5 , further comprising compacting the hollow body by inserting and expanding an expandable pressing tool into the hollow body. 
     
     
         7 . The method of  claim 1 , further comprising drying the hollow body from the inside using radiant heat and/or a stream of hot air. 
     
     
         8 . The method of  claim 1 , further comprising forming the connection element by injection-molding, curing the connection element, and pushing the connection element onto the holding device. 
     
     
         9 . The method of  claim 1 , further comprising pre-drying the hollow body in an oven before compaction. 
     
     
         10 . The method of  claim 1 , further comprising coating the inner surface of the hollow body with a biodegradable coating solution. 
     
     
         11 . The method of  claim 10 , further comprising coating the inner surface of the hollow body by pouring the biodegradable coating solution into the hollow body, wetting the inner surface of the hollow body by rotating the hollow body, and pouring out the excess biodegradable coating solution. 
     
     
         12 . A device for producing a receptacle, comprising:
 a basin for a pulp ;   a split suction mold including at least one cavity and a porous wall surrounding the at least one cavity;   a first holding device operable to move into the split suction mold;   a suction device;   a ring-shaped connection element; and   a feeding device operable to place the ring-shaped connection element on the first holding device.   
     
     
         13 . The device of  claim 12 , wherein the device further includes a transfer mold, an oven, a transfer device, a split press mold, a second holding device including an expandable pressing tool, wherein the second holding device is operable to be inserted into the split press mold, a compressor, an injector for a coating solution, a rotation device,
 and/or a radiant heat source.   
     
     
         14 . A method for producing a biodegradable container comprising:
 providing a split suction mold including at least one porous wall, wherein the at least one porous wall surrounds at least one cavity of the split suction mold, wherein the at least one cavity includes at least one opening;   inserting at least one holder including at least one connection element into the at least one cavity of the split suction mold, wherein the at least one holder protrudes through the at least one opening of the at least one cavity, wherein the at least one holder holds the at least one connection element in the mold opening;   closing the split suction mold;   forming a hollow body by sucking fibrous material from a pulp through the at least one porous wall of the split suction mold;   compacting the hollow body with the at least one connection element; and   removing the hollow body on the at least one holder from the split suction mold.   
     
     
         15 . The method of  claim 14 , further comprising drying the hollow body by radiant heat or a stream of hot air, wherein a rod-shaped heating device is inserted through the at least one opening and activated to dry the hollow body. 
     
     
         16 . The method of  claim 14 , further comprising coating at least one inner surface of the hollow body with a biodegradable coating solution by rotating the hollow body around an axis of the at least one opening. 
     
     
         17 . The method of  claim 14 , further comprising sucking pulp through the at least one holder and into at least one cavity of the split suction mold. 
     
     
         18 . The method of  claim 14 , further comprising transporting the hollow body from the split suction mold into a transfer mold and transporting the hollow body from the transfer mold to a pressing mold. 
     
     
         19 . The method of  claim 14 , further comprising compressing the hollow body in a compression mold. 
     
     
         20 . The method of  claim 14 , further comprising forming the at least one connection element by injection molding of thermoplastic material.