Warping machine is made up of several parts such as creel, open reed, head stock, warping drum and so on which is utilised in textile manufacturing process. Warping creel is spacious unit of warping machine in textile weaving process. The threads are shifted from to creels from the bobbins in warping systems. Feeding bobbins are fitted in metallic frames known as creels. These frames are actually occupied with yarn tensioning devices but in latest machines they are provided with centralized tension variation having automated control technique.
Creels are also equipped with monitoring systems of yarn breakage. The number of warping sections depends upon the creel capacity which acts as a parameter. The general warping creel capacity noted is 800-1200 bobbins. In order to increase the warping performance many solutions have been developed reducing the time to load the creel. The use of quality creels provides the most effective solution. When two creels are used for similar warping machine one of them can carry the function of warping and another can be creeled up again. It is required to conduct minimum amount of loss while using two creels and therefore, it is suggested to utilise the reserve creel with comb holder.
Forms of warping creel in warping machine:
There are various forms of creel such as truck creel, single-end creel, magazine creel, mobile creel, V-shaped creel, rotating frame creel, unrolling creel, swivel frame creel and so on. Some of them are introduced below:
Magazine creel: This form of creel is preferred to be used similar type of warps are to be prepared in a particular sequence. This creel is beneficial when same kinds of yarns are required to be processed.
Mobile creel: mobile creels are similar to standard creels. The bobbins are creeled on a particular trolley exterior to the creel. Individual trolleys of bobbin enter one after the other. While creeling up single series of trolleys, the further series of trolleys is brought back to the exterior of the creel in order to feed the warper. This ultimately lessens the waiting time.
Swivel Frame Creel: swivel frame creel type was designed acting as a variation to mobile creel to enable the creeling up of bobbins. Owing to their weight (5 to 25 kg), they cannot be pinned on trolleys. Bobbin holder is double-sided i.e. the threads are unwound from one side and an afresh series of bobbins is creeled up on the other side.
V-shaped Creel: in V-shaped creels, the creel boards are arranged in the form of infinite chains. As warping is conducted from the exterior sides using the creeled up bobbins, the following yarn can be creeled up on the empty spindles placed inside the creel. This interior room also acts as a storage and bobbin exchange station. The yarn lot can be changed by pushing a button which starts the electrically drive of the chains. The empty bobbins move towards the inside creel, the full bobbins towards the outside.
Unrolling creel: these creels are used when the elastic materials are being warped on warp beans from bobbins. Here, yarn tension can be obtained only by utilizing a positive thread feed. Bobbins in cylindrical shape on rollers turn in a proper sync i.e. in the similar direction.
Warping creel makes sure that distribution of yarn in embellished properly on the warp beam. All the yarns are segregated from each other and could occupy a proper tension by creeling.