Shearing device for strands of plastic material
AssigneeHermann Heye
InventorLothar Schaar
Life of this patent
Estimating the term…
Abstract
A device for shearing gobs from at least one strand of material in plastic condition, for instance molten glass, comprises two blades movable toward and away from each other, one of which is tiltable about its longitudinal axis, and the other about an axis transverse to its longitudinal axis.
Claims22
In a device for shearing gobs from at least one strand of plastic material, such as a strand of molten glass, a combination comprising two cooperating shear blades movable toward and away from each other, each of said shear blades comprising a frame, a cutting element fixedly connected to said frame and formed from material having a high heat penetration coefficient, high wear resistance, and good heat conductivity, each of said cutting elements having a cutting edge, a clearance face facing the other blade and including with a horizontal plane a clearance angle and which, starting from the cutting edge of one cutting element, extends away from the other blade, each of said cutting elements having, at the side opposite said clearance face, a pressure face including with a vertical plane a pressure angle and which, starting from the cutting edge of one cutting element, extends away from the other shear blade.
In a device for shearing gobs from at least one strand of plastic material, such as molten glass, a combination comprising, two cooperating shear blades movable toward and away from each other, each of said shear blades extending substantially in one plane and having a longitudinal axis, one of said shear blades being tiltable about its longitudinal axis, and the other of said shear blades being tiltable about an axis which is parallel to the plane of said other shear blade and which includes a right angle with the longitudinal axis of said other shear blade;
- a housing coordinated with said one shear blade;
- a shaft connected to said one shear blade, said shaft extending in the direction of the longitudinal axis of said one shear blade, and being turnably mounted in said housing;
- a yoke fixed to said shaft and extending transverse to the shaft axis to opposite sides of said shaft;
- and resilient abutting means between said housing and opposite ends of said yoke.
In a device for shearing gobs from at least one strand of plastic material, such as molten glass, a combination, comprising two cooperating shear blades movable toward and away from each other, each of said shear blades extending substantially in one plane and having a longitudinal axis, one of said shear blades being tiltable about its longitudinal axis, and the other of said shear blades being tiltable about an axis which is parallel to the plane of said other shear blade and which includes a right angle with the longitudinal axis of said other shear blade;
- a mounting member for said other shear blade;
- a shaft connected to said other shear blade, said shaft extending transverse to the longitudinal axis of said other shear blade and being turnably mounted in said mounting member;
- resilient abutting means between said mounting member and said other shear blade;
- a further shear blade holder for said other shear blade;
- and means between said further shear blade holder and said mounting member for adjusting the position of said mounting member relative to said further shear blade holder three dimensionally in three directions normal to each other.
Dependencies are inferred from the claim text.