EP0167317A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Mixer for mixing fibres into a slurry
Assignee: Pilkington Group Ltd
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Filing: 1985-06-14
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Granted: —
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Expires: 2005-06-14
Abstract
Abstract A mixer for mixing glass fibres into a thick aqueous cement slurry comprises means (12,14) for feeding glass fibres on to the surface of a batch of the slurry in an upright cylindrical chamber (10), an agitator mounted on a coaxial vertical shaft (16) and carrying at its lower end both a plurality of short impeller blades (17) and a long horizontal member (18) with tip blades (19) of opposite sense to the impeller blades, so as to cause vertical as well as horizontal circulation of the slurry, and stationary baffles (20) on the wall of the chamber angled to cause production of standing waves on the surface of the slurry.
Inventors
- 👤 William Henry Brunt
- 👤 Christopher John Wilson
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 10:23
CPC Classifications
B; B01; B01F; B01F27/00; B01F27/80; B01F27/86; B28; B28C; B28C5/00; B28C5/40
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
185 words
A mixer for mixing fibres into a slurry, comprising an upright cylindrical chamber, means for supplying a batch of slurry into the chamber, means for feeding glass fibres on to the surface of the batch of slurry in the chamber, and an agitator mounted on a rotatable vertical shaft coincident with the axis of the chamber, characterised in that the shaft carries, adjacent the lower end of the chamber, both a plurality of impeller blades whose radial extent is substantially less than the radius of the chamber and at least one horizontal member with tip blades adjacent the cylindrical wall of the chamber, the impeller blades and the tip blades being angled in opposite senses to produce a vertical circulation as well as a rotational movement of the slurry in the chamber, and stationary baffles are secured to the wall of the chamber and angled so that, in conjunction with the vertical and rotational movements of the slurry, they cause the production of standing waves on the surface of the slurry to assist in folding into the slurry glass fibres falling on to its surface.
Claim 2
Dependent Claim
185 words
A mixer for mixing fibres into a slurry, comprising an upright cylindrical chamber, means for supplying a batch of slurry into the chamber, means for feeding glass fibres on to the surface of the batch of slurry in the chamber, and an agitator mounted on a rotatable vertical shaft coincident with the axis of the chamber, characterised in that the shaft carries, adjacent the lower end of the chamber, both a plurality of impeller blades whose radial extent is substantially less than the radius of the chamber and at least one horizontal member with tip blades adjacent the cylindrical wall of the chamber, the impeller blades and the tip blades being angled in opposite senses to produce a vertical circulation as well as a rotational movement of the slurry in the chamber, and stationary baffles are secured to the wall of the chamber and angled so that, in conjunction with the vertical and rotational movements of the slurry, they cause the production of standing waves on the surface of the slurry to assist in folding into the slurry glass fibres falling on to its surface.
Claim 3
Dependent Claim
31 words
A mixer according to Claim 1 characterised in that the chamber has a conical bottom outlet for removing the batch of slurry after the glass fibres have been mixed into it.
Claim 4
Dependent Claim
47 words
A mixer according to Claim 1 or 2 characterised in that the impeller blades are angled to cause downward movement of the slurry adjacent the axis of the chamber while the tip blades are angled to cause upward movement of the slurry adjacent to the chamber wall.
Claim 5
Dependent Claim
42 words
A mixer according to any one of the preceding claims characterised in that each stationary baffle has a curved front wall extending obliquely from the chamber wall to deflect the rotational movement of the slurry smoothly towards the middle of the chamber.
Claim 6
Dependent Claim
27 words
A mixer according to Claim 4 characterised in that each stationary baffle has a curved rear wall which fairs the baffle smoothly back into the chamber wall.
Claim 7
Dependent Claim
42 words
A mixer according to any one of the preceding claims characterised in that the means for feeding glass fibres on to the surface of the slurry comprises a vibratory feeder disposed with its outlet above the chamber but offset from its axis.
References Cited (Backward Citations)
No citation records indexed.
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