Method of producing a deep-drawn formed plastic piece
AssigneeBayer Aktiengesellschaft
InventorsCurt Niebling, Jr., Joachim Wank
Life of this patent
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Abstract
A method of manufacturing a deep-drawn formed plastic piece comprises providing a cold-stretchable sheet material with a coating selected from a group of an ink film, an ink imprint, a vacuum evaporated metallic thin film, and an electrically conductive varnish film. The coated sheet is heated with a fluid pressure medium which has a fluid medium pressure of more than 20 bars, and at an operating temperature lower than the softening temperature of the sheet material, in order to deform the sheet material isostatically to obtain the deep-drawn formed coated plastic piece.
Claims20
A method of manufacturing a deep-drawn formed plastic piece comprising the steps of:
- providing a cold-stretchable sheet material with a coating selected from the group of an ink film, an ink imprint, a vacuum evaporated metallic thin film, and an electrically conductive varnish film;
- and
- treating said coated sheet with a fluid pressure medium having a fluid medium pressure of more than 20 bars, and at an operating temperature lower than the softening temperature of the sheet material, to deform the sheet material isostatically in order to obtain the deep-drawn formed coated plastic piece.
A method of manufacturing a deep-drawn formed plastic piece, comprising:
- providing a cold-stretchable substantially flat sheet material with a coating, with at least a portion of said coating forming a graphic representation;
- and
- applying a fluid pressure medium to said coated cold-stretchable sheet material at an operating temperature below the softening temperature of the sheet material and at a fluid medium pressure of more than 20 bars whereby deforming the sheet material isostatically in order to obtain said deep-drawn formed plastic piece without any significant distortion to said graphic representation.
Dependencies are inferred from the claim text.