Apparatus for the automatic, uniform drawing-in of elastomeric material into worm extruders
AssigneeSchiesser AG
InventorWalter H. Schiesser
Life of this patent
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Abstract
A method of, and apparatus for, automatically and uniformly drawing-in elastomeric material into worm extruders comprising at least one draw-in roll for the material mixture, arranged in spaced relationship in front of the extruder worm or screw and driven independently of the worm. The draw-in roll is driven in a manner such that it only can transmit a predetermined adjustable rotational moment which is limited towards an upper range, or, if desired, the rotational speed of the draw-in roll is controlled as a function of a maximum upwardly limited pressure prevailing within a draw-in or infeed pocket between the draw-in roll and the worm or screw.
Claims9
An apparatus for automatically, substantially uniformly drawing-in elastomeric material into a worm extruder, comprising:
- a driven extruder worm;
- at least one draw-in roll for mixture material which is to be processed arranged in spaced relationship from and upstream of the extruder worm;
- variable speed means for driving said draw-in roll independently of said extruder worm;
- means defining a material draw-in pocket between the draw-in roll and the extruder worm downstream of the draw-in roll;
- and
- control means for controlling the drive speed of the draw-in roll such that it can transmit only a predetermined maximum adjustable moment as a function of the pressure up to a predetermined maximum pressure in the draw-in pocket between the draw-in roll and the extruder worm wherein the rotational moment is adjusted in response to said pressure.
An apparatus for automatically, substantially uniformly drawing-in elastomeric material into a worm extruder, comprising:
- a driven extruder worm;
- at least one draw-in roll for material which is to be processed arranged in spaced relationship from and upstream of the extruder worm;
- means for driving said draw-in roll independently of said extruder worm;
- and
- means responsive to the pressure in the elastomeric material adjacent the extruder worm for controlling the drive of the draw-in roll to transmit only a predetermined rotational moment up to a preset maximum for maintaining a uniform feed of elastomeric material to said extruder worm.
An apparatus for automatically, substantially uniformly drawing in elastomeric material into a worm extruder comprising:
- a driven extruder worm;
- at least one draw-in roll for material which is to be processed arranged in spaced relationship from and upstream of the extruder worm;
- means for driving said draw-in roll independently of said extruder worm;
- means defining a material draw-in space between the draw-in roll and the extruder worm;
- and
- means for varying the rotational speed of the draw-in roll as a function of pressure in the draw-in space between the draw-in roll and the extruder worm up to a preset maximum pressure wherein the extruder worm maintains unchanged speed while the speed of said draw-in roll is being varied.
Dependencies are inferred from the claim text.