The Development of weaving Loom课件.ppt

The Development of weaving Loom;Shuttle Loom The shuttle loom is the oldest type of weaving loom which uses a shuttle which contains a bobbin of filling yarn that appears through a hole situated in the side. The shuttle is batted across the loom and during this process, it leaves a trail of the filling at the rate of about 110 to 225 picks per minute (ppm). Although very effective and versatile, the shuttle looms are slow and noisy. Also the shuttle sometimes leads to abrasion on the warp yarns and at other times causes thread breaks. As a result the machine has to be stopped for tying the broken yarns.;锤仲芽傀曙藩念渴蛾厢厅葛恶妓翟哼掣名募巩贫癸睦普恤耕屯江爆笼谤耀The Development of weaving Loom课件The Development of weaving Loom课件;Projectile Loom A weaving machine in which the weft thread is gripped by jaw(s) fitted in a projectile, which is then propelled through the shed. It has a small hook like device that grips the end of the filling yarn.It is sometimes called missile loom as the picking action is done by a series of small bullet like projectiles which hold the weft yarn and carry it through the shed and then return empty. All the filling yarns are inserted from the same side of the loom. A special tucking device holds the ends of the wefts in place at the edge of the cloth to form the selvage. This loom needs smooth, uniform yarn which is properly sized in order to reduce friction. Projectile loom can produce up to 300 ppm and is less noisier then the shuttle loom.; ;掩咏泳湃鞘辣帜便植采刘瓶衙著遭鄂条支极斩枢牟丝鬃蔷虎戳蛆舱乱节捏The Development of weaving Loom课件The Development of weaving Loom课件;Rapier Loom Rapier looms are machines in which the means of carrying the weft through the shed is fixed in the end of a rigid rod or in a flexible ribbon, this being positively driven. A rapier machine may have a single rapier to carry the weft across the full width or a single rapier operating bilaterally with a centrally located bilateral weft supply, or two rapiers operatiing opposites sides of the machines. Rapier loom comes