Textiles: fiber preparation – Working – Carding
Patent
1997-07-07
1999-07-27
Stryjewski, William
Textiles: fiber preparation
Working
Carding
19 22, 19 98, 19102, 19106R, D01G 1576
Patent
active
059269197
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a cleaning system for a carding machine, and in particular to a card waste management system for use with a carding machine. One
2. Present State of the Art
One function of the carding process is to remove as much trash and dust from the feedstock as possible in order that the sliver resulting from the carding process will be as clean as possible and can be spun into a yarn of correspondingly high quality. There are many regions on the conventional carding machine where cleaning is effected. One of these is on the lower arc of the takerin as feedstock is transferred on that roller from the feed plate to the main carding cylinder. The usual cleaning arrangement in this region of the carding machine is the mounting of one or more mote knives adjacent to the lower arc of the takerin. Mote knives are effective in removing a certain amount of trash and dust from the feedstock carried by the takerin.
One particularly effective mote plate type of cleaning mechanism for a carding machine is disclosed in EP-B-248649 in the name Carding Specialists (Canada) Limited, and to which reference is directed. The disclosure in EP-248649 is incorporated herein by this reference.
For a fuller disclosure of the inventive mote plate cleaning mechanism described and claimed in this European patent, reference should be had to the full copy of the text. However, brief description will be made below of a preferred embodiment of the mote plate arrangement disclosed in EP-248649, to form background and to assist the description and definition of examples of improved cleaning system for a carding machine, and card waste management system which is the subject of the present patent application. Reference will therefore now be made to FIGS. 1, 2 and 2A of the accompanying drawings, which comprise:
FIG. 1 is a schematic side elevation of the feed region of a conventional carding machine, and illustrates a known mote knife arrangement; and,
FIG. 2 is a side elevation of part of the feed region of a carding machine showing a mote knife cleaning system which forms the subject of EP-248649.
Referring to FIG. 1, there is shown part of a prior art carding machine having a chute feed arrangement 1, a feed plate 2, a feed roller 3 cooperating with the feed plate, a takerin 4, a main carding cylinder 5 and a set of rotating flats 6. The feed roller conveys feed stock from the feed plate 2 to the main carding cylinder 5 along the lower arc of the takerin, and positioned adjacent to this lower arc there are two mote knives 7. A takerin screen 8 is mounted in the region between the takerin and the main carding cylinder, and abuts a cylinder screen 9. It will be seen that each of the mote knives 7 extends substantially diametrically of the takerin and terminates in a free edge that is substantially at right angles to the direction of rotation of the takerin. The mote knives act to divert trash and dust from the fibres carried by the takerin, but their efficiency is generally recognised as being limited, and they are also prone to removing lint and short fibre that could advantageously be incorporated into the finally carded web.
FIGS. 2 and 2A show part of a carding machine similar to that shown in FIG. 1, but modified in accordance with a first embodiment of the invention which is the subject of EP-248649. In this embodiment, the mote knives are replaced by a substantially rigid, flat plate 10 which extends across the full width of the takerin 4a, downstream of the feed roller 3a, and which terminates in a leading edge 11 that is substantially parallel to the axis of the takerin and that faces into the direction of rotation of the takerin. The plate may suitably be metal sheeting, the sheeting having a thickness t of from 1 to 3 mm, with 1.5875 mm sheet presently preferred. The plate is supported by a support bar 12 which extends the full width of the carding machine and is mounted between the side frame members of the carding machine. The plate is followed in the downst
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Yasuhiro M., Abstract JP60231827, Waste Cotton Controller in Comber, vol. 10 No. 103, Nov. 1985.
Yasuhiro M., Abstract JP840186986 Under-Casing of Card Using Shape-Memory Alloy, vol. 10 No. 230, Jan. 1986.
Carding Specialist Limited
Stryjewski William
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