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Mechanical combing in manual
Feb 18th
Three components were used in manual combing: the hand and two combs. The hand acts as a gripping means while the combs process the head and the tail of the tuft. Mechanical combing is carried using linear combing machines which reproduce the actions of hand combing; the comb is still More >
Tandem card General remarks
Feb 18th
The washed, beaten and oiled wool is sent to special carding rooms through a pneumatic system. It remains there for the time necessary to allow a proper distribution of the oiling substance into the fibres and also to meet the specific production schedule. The efficiency of the carding operation strictly More >
Composition of the carding room equipment
Feb 18th
Due to the number of operations carried out and their crucial importance, the carding room equipment is a complex and imposing installation. Its role, basically, is to produce extremely regular rovings at the highest speeds compatible with the process.
The criterion which determines how many cards are used is above all More >
Hand combing method
Feb 6th
To thoroughly understand how combing machines carry out the combing process, it is worth mentioning how wool was manually combed in the past. This process included three main operations and precisely: 1. introduction of the fibre tuft in the comb; 2. combing of the head of the fibre tuft; 3. More >
Spinning–twisting machine
Feb 6th
The twisting of a fancy yarn can also be accomplished using a machine that combines the two processes, ring and hollow spindle. In this case the first operation is carried out by the hollow spindle, preceded by the core and effect yarn feeding group. Below the hollow spindle, which holds More >
How Does Finisher Card
Feb 6th
This card, again entirely provided with needles clothings, is generally made up of a drum preceded by a fly cylinder with a pair of worker-stripper cylinders, and it serves to obtain a sliver that is as highly processed as possible. The purpose of the divider (Figure 1) is to split More >
How does The Breaker Card
Jan 30th
The breaker card, fed, via the conveyor, by the loader, is made up of two drums connected by a conveyor cylinder. The first drum, equipped with a feeder group and a series of working-stripping cylinder pairs, makes up the pre-carding unit, and is entirely wired. It opens further the material More >
Use of Control Devices
Jan 28th
Metal probes, placed on the delivery side of the drying unit, are used for controlling the dried wool moisture content (which must be uniform and predetermined); these probes measure the electrical capacity or resistance fluctuations, which vary according to the quantity of water contained in the fibres. It is however More >
Hollow spindle twisting machine
Jan 28th
In this machine the hollow spindle with the binder yarn is positioned between two pairs of cylinders, while a hook, below the spindle and rotating in the same direction, twists the core and effect yarn (Figure 1).
Fig. 1 Principle of the hollow spindle twisting machine
Given the intermediate position of the More >
Method of Pre-opening
Jan 28th
The bale opener (Figure 1) includes the “To” two-section horizontal conveyor on which the greasy wool bales are loaded; the bales pass from one sector to the following one and are turned upside down and are partially divided into big tufts of wool. The “To” conveyor conveys the fibre mass More >
