Roehm Gmbh & Co Kg

Hans-Juergen Kress

Werner Hoess

Klaus Albrecht

Michael Wicker

Klaus Schultes

Rudolf Blass

Michael Zietek

Thomas Hasskerl

Alexander Theil

Heinrich Gaul

Harry Schwarz

The invention relates to a moulding composition and to the mouldings which can be produced therefrom. Due to their good resistance in the hot water cycle test and in the hot-water/isopropanol test, the plastics mouldings have particularly good suitability for the production of sanitary components.

Articles made of PMMA molding compound

The invention relates to an impact-modified moulding composition which has particularly high impact resistance at low temperatures (&#x2212;20&#xb0; C., &#x2212;40&#xb0; C.). This low-temperature impact resistance is achieved by using a silicone elastomer.

Molding materials exhibiting an improved low-temperature impact resistance

The invention relates to an impact-modified molding composition which has particularly high impact resistance at low temperatures (&#x2212;20&#xb0; C., &#x2212;40&#xb0; C.). This low-temperature impact resistance is achieved by using a silicone elastomer.

PMMA molding materials exhibiting an improved low-temperature impact resistance

The invention relates to a shaping tool for the injection molding or injection compression of information carrier disc blanks ( ) made of polymethacrylate plastic which is suited as a component of an injection molding or injection compression machine. The shaping tool is comprised of two mold parts ( ), whereby one mold part ( ) contains a bottom part ( ) of a mold with the information data and, together with the second mold part ( ), forms a cavity for the one information carrier blank and one sprue bush ( ) for a sprue piece ( ) in the tool having a concentrically positioned feed orifice ( ). In addition, the tool comprises a impact cylinder ( ) for shearing the sprue piece ( ) and has an ejector pin ( ). The invention is characterized in that the injection gap (SP) between the feed orifice ( ) of the sprue piece ( ) and the information carrier disc blank ( ) is less than 0.3 mm. In addition, the cutting gap (SN) between the edge of the impact cylinder ( ) and the information carrier disc blank ( ) is less than 0.2 mm.

Shaping tool for information carrier disc blanks

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Bruehl, Germany

Hans-Juergen Kress