Specialized metallurgical processes – compositions for use therei – Processes – Free metal or alloy reductant contains magnesium
Patent
1987-10-16
1989-09-12
Shoop, Jr., William M.
Specialized metallurgical processes, compositions for use therei
Processes
Free metal or alloy reductant contains magnesium
73 377, 19240, D01H 532
Patent
active
048648531
DESCRIPTION:
BRIEF SUMMARY
DESCRIPTION
The invention relates to an apparatus for measuring the thickness and the irregularity of fibre slivers, preferably on machinery used in preparation for spinning, with a compression member compressing the fibre sliver and with a measuring device which is arranged thereon, mechanically scans the compressed fibre sliver in a measuring duct and is formed by a leaf spring provided with a resistance strain gauge for measuring the thickness and the irregularity of the fibre sliver.
With an apparatus of this type described in DE-PS 15 10 487, the measuring duct is provided in a wall integrally connected to the outlet opening of the compression member formed by a sliver hopper and the leaf spring is fixed on the sliver hopper and extends along a generatrix of the sliver hopper.
This produces a certain amount of inertia in the measuring device. Moreover, the entire sliver hopper invariably has to be exchanged for adaptation to varying numbers of slivers.
Accordingly, this known apparatus is to be improved by the invention in that even very short irregularities can be measured at a high sliver speed and in that simple adaptation of the range to varying numbers of slivers can be effected.
This object is achieved according to the invention in that the measuring duct is provided in a measuring member arranged removably on the compression member and in that the measuring member is equipped with a compressed air nozzle.
The arrangement of the measuring duct in a removable measuring member on the compression member has the advantage that, for adaptation to varying numbers of slivers, it is no longer necessary to exchange the entire compression member but merely the named component or even only part thereof. The compressed air nozzle allows settling dust to be blown out and/or allows the measuring station to be cooled.
An embodiment of the invention is described in more detail below with reference to the drawings.
FIG. 1 shows a longitudinal section through a first embodiment of a sliver hopper with a measuring device.
FIG. 2 shows a view in the direction of the arrow II in FIG. 1.
FIG. 3 shows a view in the direction of the arrow III in FIG. 2.
FIGS. 4 to 6 show details of the measuring member from FIGS. 1 to 3.
FIG. 6a shows a schematic illustration to describe operation.
FIG. 7 shows a longitudinal section through a second embodiment of a sliver hopper.
FIG. 8 shows a view in the direction of the arrow A in FIG. 7.
FIG. 9 shows a plane view of the stop part of a measuring member suitable for the sliver hopper in FIG. 7.
FIG. 10 shows a section along the line B--B in FIG. 9.
FIG. 11 shows a plane view of a leaf spring with its support.
FIG. 12 shows a section along the line C--C in FIG. 11.
FIG. 13 shows a section along the line E--E in FIG. 12.
FIGS. 1-3 show a first embodiment of a sliver hopper T for compressing a fibre sliver with a hopper wall 1 and an inlet opening 2 and outlet opening 3. Sliver hoppers of this type are known and are used, in particular, on draw-frames or carding engines. On draw-frames they are used, for example, after the drawing rollers and/or before a pair of calender rollers in the direction of passage. In carding engines, the sliver hopper may be connected, for example, to the can or it may be provided for collecting the card web.
Adjacent to the outlet opening 3, the sliver hopper T has a slope into which a measuring member MT having a measuring duct 4 is inserted. The measuring member MT consists of two parts, a duct part 5 and a stop part 6 between which a leaf spring BF is fixed. The leaf spring BF serves as measuring device for measuring the thickness of a fibre sliver running through the sliver hopper 1 and the measuring duct 4.
FIG. 4 shows a view of the leaf spring BF, and FIGS. 5 and 6 each show a view of the clamping face of the duct part 5 or the stop part 6 facing the leaf spring BF. The design of the measuring member MT will now be described with reference to FIGS. 1 to 6, a scale of 4:1 being used in each case.
The duct part 5 has an approximately plate-shaped confi
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Baechler Francois
Grunder Werner
Murbach Erwin
Ip Paul
Shoop Jr. William M.
Zellweger Uster Ltd.
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