Machine and part therefor
AssigneeImperial Chemical Industries PLC
InventorDavid H. Thomas
Life of this patent
Estimating the term…
Abstract
The invention includes a sheet moulding machine and a roller for use with the machine. The roller is wave-shaped along its longitudinal axis and/or is cut with one or more longitudinal grooves. This roller is located in the sheet moulding machine together with an adjacent co-operating surface such as a flat-surfaced roller. The moulding composition is extruded between the rollers.
Claims16
A sheet moulding machine comprising at least one roller and adjacent cooperating surface located so that sheet is able to be extruded between the roller and the surface, the surface of the roller being wave-shaped along at least part of its longitudinal axis, the wave lengths decreasing progressively from the mid-point of the longitudinal axis at least part of the way towards each end of the roller and the waves having substantially constant amplitude.
A sheet moulding machine comprising at least one roller and adjacent cooperating surface located so that sheet is able to be extruded between the roller and the surface,
- the surface of the roller being wave-shaped along at least part of its longitudinal axis, the wave lengths decreasing progressively from the mid-point of the longitudinal axis at least part of the way towards each end of the roller, and
- one or more grooves formed in the roller surface substantially parallel to its longitudinal axis.
A sheet moulding machine comprising
- means for providing a homogeneous distribution of components in a plastic sheet to be formed of non-homogeneous material by kneading of the material while forming a sheet therefrom, said means comprising
- at least one roller and adjacent cooperating surface located so that the sheet is able to be extruded between the roller and the surface, and
- the surface of the roller being wave-shaped along at least part of its longitudinal axis, the wavelengths decreasing progressively from the mid-point of the longitudinal axis at least part of the way towards each end of the roller;
- and
- means for supplying non-homogeneous material to said means for providing a homogeneous distribution while forming a plastic sheet.
Dependencies are inferred from the claim text.