Plant and Method for Making Continuous Elastic Yarns Made of Silicon Material and Continuous Elastic Yarn Made of Silicon Material Thus Obtained
First Claim
1. Plant for making continuous yarns (30) made of silicon material, comprising at least an extrusion station (12), provided with an extrusion body (31) into which said material is able to be introduced in an amorphous condition, and extrusion means (15) able to allow said material to exit from said extrusion station (12) along an extrusion axis (D), and a vulcanization station (16), located downstream of said extrusion station (12), at a determinate distance (“
- L”
) therefrom, characterized in that;
said extrusion means (15) are disposed so that the extrusion axis (D) is substantially vertical,the plant also comprises a drawing unit (18), disposed downstream of said vulcanization station (16), and able to impart on the elastic yarn (30) exiting from the extrusion station (12) a drawing value in a ratio comprised between 2 and 6 before it enters the vulcanization station (16), and hence at least along said distance (“
L”
),wherein said distance (“
L”
) is adjustable to vary the drawing conditions of the elastic yarn (30) and to obtain a final yarn (30) with a thickness at least less than 0.7 mm, advantageously in the range of 0.4-0.3 mm and less, and having the desired orientation of the molecular chains.
2 Assignments
0 Petitions
Accused Products
Abstract
A plant for making continuous yarns (30) made of silicon material comprises at least an extrusion station (12), into which the material is introduced in an amorphous condition, and extrusion means (15) which cause the material to exit from the extrusion station (12) along an extrusion axis (D). The plant also comprises a vulcanization station (16), located downstream of the extrusion station (12), at a determinate distance (“L”) therefrom, in which the continuous yarn (30) is vulcanized in a direction of treatment (T). The plant also comprises a drawing unit (18), disposed downstream of the vulcanization station (16).
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Citations
11 Claims
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1. Plant for making continuous yarns (30) made of silicon material, comprising at least an extrusion station (12), provided with an extrusion body (31) into which said material is able to be introduced in an amorphous condition, and extrusion means (15) able to allow said material to exit from said extrusion station (12) along an extrusion axis (D), and a vulcanization station (16), located downstream of said extrusion station (12), at a determinate distance (“
- L”
) therefrom, characterized in that;said extrusion means (15) are disposed so that the extrusion axis (D) is substantially vertical, the plant also comprises a drawing unit (18), disposed downstream of said vulcanization station (16), and able to impart on the elastic yarn (30) exiting from the extrusion station (12) a drawing value in a ratio comprised between 2 and 6 before it enters the vulcanization station (16), and hence at least along said distance (“
L”
),wherein said distance (“
L”
) is adjustable to vary the drawing conditions of the elastic yarn (30) and to obtain a final yarn (30) with a thickness at least less than 0.7 mm, advantageously in the range of 0.4-0.3 mm and less, and having the desired orientation of the molecular chains. - View Dependent Claims (2, 3, 4)
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5. Plant as in any claim hereinbefore, characterized in that said extrusion body (31) has a vertical elbow shape.
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6. Plant as in any claim hereinbefore, comprising a collection unit (26), located downstream of the vulcanization station (16) and able to collect the extruded product (30), characterized in that said collection unit (26) comprises said drawing unit (18).
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7. Plant as in any claim hereinbefore, characterized in that it comprises a controlled cooling station (17), located downstream of the vulcanization station (16) and upstream of the collection unit (26).
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8. Plant as in any claim hereinbefore, characterized in that the extrusion station (12) comprises a heating and cooling device (24) for the heat regulation of the extrusion station (12).
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9. Plant as in any claim hereinbefore, characterized in that the vulcanization station (16) comprises a zonal vulcanization oven (27).
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10. Elastic yarn made of silicon material, made in a plant as in any claim hereinbefore, with a diameter in the range of 0.3-0.4 mm and less, to 0.1 mm, with a number of filaments comprised between 2 and 30.
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11. Method to make elastic yarns (30) of silicon material, comprising at least an extrusion step, wherein by means of an extrusion station (12) comprising extrusion means (15) said material is made to exit along an extrusion axis (D), with a conditioned shaping, and at least a vulcanization station step carried out in a vulcanization oven (27) disposed downstream of said extrusion means (15), characterized in that:
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in said extrusion step, said extrusion means (15) confer on the extrusion axis (D) a substantially vertical direction, in the segment (“
L”
) between the exit from the extrusion means (15) and the entrance into the vulcanization oven the elastic yarn (30) is subjected to a drawing action performed by a drawing unit (18) disposed downstream of said vulcanization oven (27), in which the drawing ratio conferred on the elastic yarn (30) before entering the vulcanization oven (27) is comprised in a value between 2 and 6 and in which the elastic yarn (30) has a final thickness of less than 0.7 mm, advantageously in the range of 0.4-0.3 mm, to 0.1 mm
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Specification