Method for producing a moulded body that encloses a cavity by welding two partial bodies, and die for welding two partial bodies
AssigneeBASF SE
InventorsStefan Mochev, Ulrich Endemann
Life of this patent
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Abstract
Described herein is a process for producing a molded body which encloses a cavity, by welding two partial bodies. Also described herein is a die with which the process of producing the molded body can be carried out. Also described herein is a molded body which can be obtained by the process.
Claims15
A process for producing a molded body which encloses a cavity, by welding of two partial bodies (1a, 1b),
- comprising the steps a), b), c), d) and e):
- a) providing a first partial body (1a), wherein the first partial body (1a) comprises a continuous welding web (2a),
- b) providing a die (5) which comprises a continuous channel (7a), wherein the course of the channel (7a) in essence corresponds to the course of the welding web (2a), wherein the channel (7a) comprises means (11a) for introducing hot gas, and wherein the die (5) comprises a means (30a) for an active regulation of pressure,
- c) positioning the welding web (2a) of the first partial body (1a) in the region of the channel (7a) of the die (5), whereupon a first internal space (20a) is formed between the first partial body (1a) and the die (5),
- d) introducing hot gas through the channel (7a), with resultant melting of the welding web (2a) of the first partial body (1a), and active regulation of the pressure in the first internal space (20a) by the means (30a) and
- e) bringing the molten welding web (2a) of the first partial body into contact with a welding web (2b) of a second partial body (1b), wherein the course of the welding web (2b) in essence corresponds to the course of the welding web (2a).
A die (5) for welding two partial bodies (1a, 1b), which comprises a continuous channel (7a), wherein the channel (7a) comprises means (11a) for introducing hot gas, and wherein a welding web (2a) of the first partial body (1a) can be positioned in the region of the channel (7a), wherein the course of the welding web (2a) in essence corresponds to the course of the channel (7a), wherein a first internal space (20a) can be formed between the first partial body (1a) and the die (5) and wherein the die (5) comprises a means (30a) for an active regulation of pressure.
Dependencies are inferred from the claim text.