Textiles: weaving – Special-type looms
Patent
1992-01-08
1993-07-20
Falik, Andrew M.
Textiles: weaving
Special-type looms
139DIG1, 156148, 156393, 428109, 428113, 428119, 428902, D03D 4100
Patent
active
052284816
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a method and apparatus for weaving rod piercing type three-dimensional multiple-axis fabric.
2. DISCUSSION OF THE RELATED ART
In a co-pending prior application H2-91263, the present inventors proposed a weaving machine for rod piercing type three-dimensional multiple-axis fabric, in which three-dimensional fabric is woven by inserting a group of weft rods into a plural number of parallelly arranged warp rods from a plural number of directions. The weaving machine of this kind involves three problems as discussed below.
First, in a weaving machine for rod piercing type three-dimensional fabric, the fore ends of inserted weft rods are retained on a fall-preventive wall which prevents the weft rods from falling off. In step with the progress of a weaving operation, the fall-preventive wall is fed sequentially in the weaving direction along with a rod support plate, which supports a woven part of fabric and the warp rods, thereby forming three-dimensional fabric to a desired length.
However, a weaving machine, which is arranged to feed the fall-preventive wall along with woven fabric and rod support plate, requires the inserting weft rod group to have a length which is far longer than the length which is necessary for the fabric, as explained below with reference to FIG. 8.
More specifically, in a weaving process for three-dimensional four-axis fabric with a hexagonal shape in section as shown in FIGS. 8 to 10, in order to insert, from each of three arrowed directions, a group of flatly arrayed weft rods 2 into a group of warp rods 1 which are arranged vertically relative to the face of the drawing, it is necessary to secure an insertion space S for each weft rod group to be inserted by a rod insertion mechanism 15, and to provide a fall-preventive wall W for each one of the weft rod groups. For these purposes, the fall-preventive walls W, which need to have a width almost the same as the width of the insertion space S, have to be located at a relatively large distance from the warp rod group 1, and, in order to abut the fore ends of the weft rod groups against the fall-preventive walls W, the weft rods are required to have a length far longer than the length which is needed for weaving the three-dimensional fabric, as indicated at L in the same figure.
Thus, in case of a rod piercing type three-dimensional multiple-axis fabric weaving machine which is arranged to move the fall-preventive walls W up and down together with the woven fabric for the purpose of retaining the fabric in a stabilized state, wastefully lengthy weft rods are needed because of the layout of the rod insertion means which has to be located in such a way as to evade the fall-preventive walls, and there is a necessity for considering a countermeasure to this problem.
The second problem concerns the beating operation in the weaving process of three-dimensional fabrics having four axes or more.
A rod piercing type three-dimensional three-axis fabric can be woven by inserting weft rods into a large number of parallelly disposed warp rods from two perpendicularly intersecting directions. In a weaving machine for such three-dimensional three-axis fabric, the inserting weft rods are arrayed in parallel relation with each other, so that it is possible to beat the inserted weft rods successively by means of a beater with a large number of holes for threading the weft rods therethrough.
However, in case of three-dimensional fabric of four or more axes as shown in FIGS. 1, 9 and 10, the weft rod groups, to be inserted into a group of warp rods from a plural number of directions, are not disposed in parallel relation with each other and are projected with complicated inclinations which make the beating operation as mentioned above difficult. Therefore, a suitable beating means needs to be developed in order to weave a three-dimensional fabric by insertion of weft rods which are arrayed in high density.
The third problem concerns the arrangement of the weft rods to be inse
REFERENCES:
patent: 3955602 (1976-05-01), King
patent: 4038440 (1977-07-01), King
patent: 4165355 (1979-08-01), Vasilos
patent: 5076330 (1991-12-01), Kimbara et al.
patent: 5178705 (1993-01-01), Kimbara et al.
Kimbara Masahiko
Tsuzuki Makoto
Falik Andrew M.
Three-D Composites Research Corporation
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