IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0497713
(2002-12-19)
|
우선권정보 |
DE-101 63 683(2001-12-21) |
국제출원번호 |
PCT/DE02/004647
(2002-12-19)
|
§371/§102 date |
20041202
(20041202)
|
국제공개번호 |
WO03/056085
(2003-07-10)
|
발명자
/ 주소 |
- Franzke,Gerd
- Schierz,Markus
- Schierz,Claus
- Waldmann,Martin
|
출원인 / 주소 |
- Karl Mayer Malimo Textilmaschinenfabrik GmbH
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
1 인용 특허 :
7 |
초록
▼
The invention relates to a method and a system for producing a multi-layer thread or fibre arrangement (GF) which is pre-fixed by means of a loop structure and is used a s a strip-type semi-finished product for reinforcing elements consisting of plastic or resin. Said fibre arrangement (GF) comprise
The invention relates to a method and a system for producing a multi-layer thread or fibre arrangement (GF) which is pre-fixed by means of a loop structure and is used a s a strip-type semi-finished product for reinforcing elements consisting of plastic or resin. Said fibre arrangement (GF) comprises layers consisting of stationary weft yarns (K) and layers consisting of thread or fibre warps (S, D,D') which are stretched between conveyor chains in such a way that they are oriented in different directions. The aim of the invention is to reduce the costs and the required surface mass, simultaneously maintaining defined, required flexural strength. To this end, the method is designed in such a way that the stationary weft layer (KR) consisting of fibre or thread warps and oriented parallel to the working direction is located directly adjacent to the needle loops (WN) of the loop structure, and needle loops (WNv) of the loop structure cross the threads or fibres of the stationary weft layer, in the knock-over phase, before the knitting needles (1) penetrate the thread arrangement (G) in order to create a successive row of loops.
대표청구항
▼
What is claimed is: 1. Method of producing a preconsolidated elongated multi-strata fabric suitable for reinforcing plastic or resin articles, each of said strata being oriented differently from adjacent said strata and being comprised of thread or fiber sheets, at least one of said strata being a
What is claimed is: 1. Method of producing a preconsolidated elongated multi-strata fabric suitable for reinforcing plastic or resin articles, each of said strata being oriented differently from adjacent said strata and being comprised of thread or fiber sheets, at least one of said strata being a stationary weft stratum, each said stationary weft stratum being comprised of thread or fiber sheet oriented at least substantially parallel to a machine direction, the method comprising forming at least one stationary weft stratum by forming a sheet of threads or fibers stretched between rows of hooks on laterally spaced substantially parallel conveyor chains thereby to produce at least one thread or fiber fabric, said stationary weft stratum being a lowermost stratum of said multi-strata fabric; transporting said at least one thread or fiber fabric by means of said conveyor chains in a working direction to a warp knitting machine; by means of said warp knitting machine forming loops which bind threads or fibers of all said strata comprised of a respective thread or fiber fabric thereby to form a preconsolidated thread or fiber multi-strata fabric; penetrating the multi-strata fabric with the needles of the warp knitting machine and forming needle loops, the lowermost stratum being immediately adjacent the needle loops, the needle loops comprising legs which in a stage of a row of needle loops being cast off cross one another due to a relative mutual displacement of the needle loops and the stationary weft threads relative to a preceding site at which a preceding row of needle loops were formed to bind said threads or fibers; and subsequently penetrating said multi-strata fabric again with the row of needles to form a subsequent row of loops additionally binding said threads or fibers. 2. Method according to claim 1, wherein the threads or fibers of the lowermost stationary weft stratum are supported upstream and downstream of the needles; the threads or fibers of the lowermost stationary weft stratum are stretched in the working direction against pressure applied to the threads or fibers by the casting off and the stretched threads or fibers guide the lowermost stationary weft stratum in a plane of the casting off across a plane of the needles; and needle loops guided by the needles, after crossing over threads or fibers of the lowermost stationary weft stratum, are deposited and cast off with the aid of needle loops of the subsequent row of loops. 3. Method according to claim 1, wherein the lowermost weft stratum is supported on cast off elements of the warp knitting machine by means of profiled guide surfaces oriented in a direction in which the preset multi-strata fabric produced by the method is taken up and is guided against lateral deflection. 4. Method according to claim 1, wherein the threads or fibers of the lowermost stationary weft stratum are laterally displaced during the cast off stage by at least one needle gauge by means of profiled guide surfaces oriented in a direction in which the preset multi-strata fabric produced by the method is taken up and by laterally displaceable cast off elements; and the needle loops are guided by the needles, which cannot be laterally displaced, after displacement of the threads or fibers of the lowermost stationary weft stratum, and are knocked off by the needle loops by the subsequent row of loops. 5. Method according to claim 1, wherein transversely oriented weft fibers of predetermined length are fed between a plane of the casting off and the lowermost stationary weft stratum and are bound in the multi-strata fabric by the needle loops. 6. Method according to claim 1, wherein the threads or fibers of the stationary weft stratum are guided into a plane of the casting off as the lowermost stratum of the multi-strata fabric, threads or fibers of the latter being first deposited on a moving conveyor belt. 7. Method according to claim 1, further comprising arranging an additional stationary weft stratum comprised of stationary weft threads or fibers as an uppermost stratum, and wherein the knitting machine comprises a working thread guide and a needle bar and the needle bar is operated for tricot laying and the working thread guide is operated with even pattern notation or counter notation relative to displacement of the needle bar. 8. Method according to claim 7, further comprising arranging between said uppermost stratum and said lowermost stratum at least two strata comprised of threads which are diagonal to the machine direction and, between said diagonal strata, a stratum comprised of threads which are at substantially a right angle to the working direction. 9. Method according to claim 8, wherein between said uppermost stratum and said lowermost stratum are arranged at least two strata comprised of threads which are at substantially a right angle to the working direction. 10. Method according to claim 7, further comprising arranging between the uppermost stratum and the lowermost stratum two strata comprised of tangled fibers and, between said tangled fibers strata, a stratum comprised of threads or fibers which are at substantially a right angle to the working direction. 11. Apparatus for producing a preconsolidated elongated multi-strata fabric, comprising a pair of substantially parallel conveyor chains provided with hooks for engaging threads or fibers stretched between the conveyor chains; a thread or fiber supply apparatus for stationary weft threads or fibers; at least one thread or fiber laying apparatus for forming a thread or fiber sheet comprised of threads or fibers stretched between the conveyor chains; a conveyor belt arranged between the conveyor chains for supporting and transporting a thread or fiber fabric; a warp knitting machine having knitting needles arranged for transversely penetrating the thread or fiber sheet and fabric in a casting off plane in a loop formation zone of the knitting machine; guide elements for the conveyor chains arranged between the laying apparatus and the loop formation zone; in an entry area of the laying apparatus, a thread or fiber supply apparatus for stationary weft threads for guiding a sheet of stationary weft threads to form a lowermost stratum of the multi-strata fabric; a cast off bar of the knitting machine at least a part of which is arranged on a side of the needle face of the knitting needles and in proximity thereto; and associated with the cast off bar, guide elements which counter force applied in the cast off direction and for lateral guidance of the thread or fiber fabric against displacement of thread or fiber loops formed by the knitting needles. 12. Apparatus according to claim 11, wherein the knitting machine is a stitch bonding machine. 13. Apparatus according to claim 11, further comprising a knitting needle bar of the knitting machine adapted to be operated by a lift drive and by a displacement drive for displacing the needle bar across at least one needle gauge. 14. Apparatus for producing a pre-consolidated elongated multi-strata fabric, comprising a pair of substantially parallel conveyor chains provided with hooks for engaging threads or fibers stretched between the conveyor chains; a thread or fiber supply apparatus for stationary weft threads or fibers; at least one thread or fiber laying apparatus for forming a thread or fiber sheet comprised of threads or fibers stretched between the conveyor chains; a conveyor belt arranged between the conveyor chains for supporting and transporting a thread or fiber fabric; a warp knitting machine having knitting needles arranged for transversely penetrating the thread or fiber sheet and fabric in a casting off plane in a loop formation zone of the knitting machine; guide elements for the conveyor chains arranged between the laying apparatus and the loop formation zone; in an entry area of the laying apparatus, a thread or fiber supply apparatus for stationary weft threads for guiding a sheet of stationary weft threads to form a lowermost stratum of the multi-strata fabric; apparatus for supplying a stratum of tangled fibers of predetermined length, arranged below the thread or fiber fabric and immediately in front of a cast off bar of the warp knitting machine; and between the apparatus for supplying a stratum of tangled fibers and the cast off bar, means for holding the fibers of predetermined length on the lowermost stratum. 15. Apparatus according to claim 14, wherein the means for holding the fibers of predetermined length on the lowermost stratum comprises an air duct bar. 16. Preconsolidated elongated thread or fiber multi-strata fabric suitable for reinforcing articles comprised of resin or plastic, the fabric comprising a lowermost stratum comprised solely of thread or fiber sheet oriented at least in part as stationary weft threads or fibers substantially parallel to a longitudinal axis of the multi-strata fabric; and needle loops formed by needles of a knitting machine, the needle loops having legs binding the stationary weft threads or fibers. 17. Preconsolidated elongated thread or fiber multi-strata fabric according to claim 16, further comprising an uppermost stratum comprised solely of thread or fiber sheet oriented at least in part as stationary weft threads or fibers substantially parallel to a longitudinal axis of the multi-strata fabric; and plate loops formed by the needles binding the stationary weft threads or fibers of the uppermost stratum. 18. Preconsolidated elongated thread or fiber multi-strata fabric according to claim 17, further comprising between the uppermost stratum and the lowermost stratum, transversely oriented weft threads or fibers of predetermined length, and wherein the needle loops and the plate loops also bind the transversely oriented weft threads or fibers.
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