M.Y.L.E.® System

The idea of the M.Y.L.E. (More Yarn Less Energy) System was born approximately one year ago, from considerations on the considerable thickness of the tubes we were producing for some of our customers, compared to the ones for different types of spinning frames. This called for a reduction in the outside diameter of the tubes, without affecting their performance and resistance. We then started researching for a new plastic material which could provide higher mechanic features, a higher resistance to heat and a higher resistance to stresses than the standard materials commonly used.

We found all these in the new "FW4".

The following diagrams show the top performances of this material in terms of bending caused by stress and high temperature.




Also, the specific weight of FW4 is the same as for PC, but considerably lower than for other materials, as shown in the diagram here on the right.

The ultimate benefit of reducing the thickness of the wall of the tubes is, obviously, an increase in the capacity of the yarn carrier. However, a thinner outside diameter means that the top diameter is smaller too, resulting in the fact that the tubes may easily overlap.

The best solution to this problem was to modify the outer profile of the tubes as shown on the sketch here below, where the profile of M.Y.L.E. tubes is drawn in red, compared to the black profile of standard tubes.
The base section was also reinforced, to make the tubes stronger when they drop from the machine.


Tests were made on a RIETER K44 frame with pure cotton Ne50 for weaving, ring Ø 38 mm, average speed 17,000 rpm, max. 17,500 rpm.
Two types of tubes were placed on this machine: one as per Rieter dwg. 0771-2741, made of PA+30%FG with a wall thickness of 2.5 mm and a weight of 39 g, and the M.Y.L.E. tube with a weight of 21 g, which results in a reduction of 18 kg in the mass rotating on the spindles.

The results given below are an average among 16 cycles with conventional tubes and 7 cycles with M.Y.L.E. tubes.


RESULTS

Yarn outside Ø

Tube weight g Net weight g. Max. Amp. KW/h KW/h/kg

Conventional tube

37 mm

39

61.53

74

82.18 1.325

M.Y.L.E.

37 mm

21

66.10

72

83.87 1258

-18 =
- 46%		 +4.57 =
7.43%		 - 2 =
- 2.77%		 + 1.69 =
2.05%		 - 67 =
- 5.3%

That is, we have a 7.43% higher capacity and an energy saving of 5.3%.