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AssigneeEms-Chemie AG
InventorsThomas Jeltsch, Werner Kägi
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The present invention relates to a method for equalizing the orientation of fillers and/or distribution of fillers in a molding compound comprising filled plastic material of an injection molded part. A method of this type is required in particular during injection molding. The method according to the invention is characterized in that the injection mold and the molding compound are supplied with sound during injection molding in the injection mold. The sound has a frequency in the range of the spectrum of the first ten natural frequencies of the filler-matrix system. By supplying with this sound, the fillers, for example fibers, are distributed within the injection molding compound in a more isotropic manner with respect to their orientation and distribution so that significantly better mechanical and optical properties of the injection molded part are produced.
Method for equalizing the orientation of fillers or distribution of fillers in a molding compound containing a filled plastic material of an injection molded part which is produced in an injection mould and contains the molding compound, the injection mold and the molding compound being supplied with sound during the injection molding in the injection mould, wherein the sound is supplied in at least one region in which the molding compound forms a joint line with the fillers in this region being substantially anisotropic, and the sound has a frequency spectrum which corresponds 20 the main resonance frequencies of the filler-matrix system in the melt state, with which the isotropy of the fillers in the region of the joint line is increased.
Method for equalizing the orientation of fillers or distribution of fillers in a molding compound containing a filled plastic material of an injection molded part which is produced in an injection mould and contains the molding compound, the injection mold and the molding compound being supplied with sound during the injection molding in the injection mould, wherein the sound is supplied in at least one region in which the molding compound forms a joint line with the fillers in this region being substantially anisotropic, and the sound has a frequency spectrum which corresponds to the main resonance frequencies of the filler-matrix system in the melt state, with which the isotropy of the fillers in the region of the joint line is increased;
Dependencies are inferred from the claim text.