PROCESS TO SET THE OPTIMAL WORKING HEIGHT BETWEEN THE ENTRY POINT AND THE EXIT POINT OF THE THREAD IN A TWISTING MACHINE AND/OR THREAD SPINNING MACHINE, AND TWISTING MACHINE AND/OR THREAD SPINNING MACHINE THAT APPLIES SUCH PROCESS

Abstract

Process to set the optimal working height between the thread entry point and the thread exit point in a twisting and/or thread spinning machine, and a twisting and/or thread spinning machine that applies such process including: identifying the variation of tension of the thread produced by the variation of the winding diameter (d) of the thread (8) on the bobbin (5), depending on the position of the rocker (6), or the winding diameter of the thread on the bobbin (5); carrying out the displacements from the thread entry point (PE) and/or from the thread exit point (PS) to obtain a distance (LB) between both in which the variations of tension counter each other.

Claims

1. A process to set the optimal working height between the thread entry point (PE) and the exit point (PS) on a twisting and/or thread spinning machine (1) that operates with two or more balloons (B), that comprises feeding means (2) of the untwisted thread (8), guiding means (3) that define the thread entry point (PE) at the upper part of a twisting area (4), a cursor that slides on a ring or rocker (6) and that defines the thread exit point (PS) at the lower part of the twisting area (4), the thread exit point (PS) being mobile in height, and collecting means of the twisted thread or bobbin (5) with a winding diameter (d) of the thread on the bobbin (5), the distance (LB) being the height of the twisting area (4) located between the thread entry point (PE) and the thread exit point (PS) where the thread (8), characterized in that it comprises a step where the distance (LB) increases or decreases by displacing dynamically the thread entry point (PE) and/or the thread exit point (PS) so that the variations of the tension of the thread (8) produced by the variation of the winding diameter (d) of the thread (8) on la bobbin (5) counter each other, achieving a constant tension on the thread during the working cycle of the spinning or twisting process.

2. The process to set the optimal working height between the thread entry point and the exit point in a twisting and/or thread spinning machine, according to the claim 1, characterized in that the distance LB between (PE) and (PS) increases when the thread winding diameter on the bob-bin is from most to least, and a step where the distance LB between (PE) and (PS) decreases when the thread winding diameter on the bobbin is from least to most.

3. The process to set the optimal working height between the thread entry point and the exit point on a twisting and/or thread spinning machine, according to claim 1, characterized in that the proportion between the increase or decrease of the height thread exit point (PS) and the increase or decrease of the height thread entry point (PE) is between 1/1,01 and 1/50.

4. The process to set the optimal working height between the thread entry point and the thread exit point in a twisting and/or thread spinning machine, according to claim 1, characterized in that, in addition, to calculate the said optimal distance (LB) the following steps are carried out: introduction of variables of the thread (8); its mass, and the variables of the machine (1); the radius of the ring or rocker (6) and the collection radius of the bobbin (5), introduction of the coefficients: of friction of the thread (8) with the air, of friction of the thread (8) with the fastening means (6), execution of the equations: $\left(v^2-T_g+\frac{1}{2}{r}^2\right)\left(r^{″}-r{\theta }^{\prime 2}\right)-2\mathrm{vr}{\theta }^{\prime }-r={\mathrm{rr}}^{\prime 2}+D_n{r}^3{r}^{\prime }{\theta }^{\prime }\sqrt{r^{\prime 2}+z^{\prime 2}}$ $\left(v^2-T_g+\frac{1}{2}{r}^2\right)\left(2r^{\prime }{\theta }^{\prime }+r{\theta }^{″}\right)+2{\mathrm{vr}}^{\prime }=r^2{r}^{\prime }{\theta }^{\prime }-D_n{r^2\left(\sqrt{r^{\prime 2}+z^{\prime 2}}\right)}^3$ $\left(v^2-T_g+\frac{1}{2}{r}^2\right)z^{″}={\mathrm{rr}}^{\prime }{z}^{\prime }+D_n{r}^3{z}^{\prime }{\theta }^{\prime }\sqrt{r^{\prime 2}+z^{\prime 2}}$ $I=r^{\prime 2}+r^2{\theta }^{\prime 2}+z^{\prime 2},\mathrm{and}$ $\mathrm{Ti}\left(\text{?}\right)\left(\text{?}\left(\varphi \right)-\text{?}\left(\text{?}\right)\right)=\mu s-r\sqrt{\begin{array}{c}{\left(\mathrm{Ti}\left(\text{?}\right)\left(r_i^{\prime }\left({\lambda }_i\right)+G\text{?}\left(\varphi \right)\right)-M\right)}^2+\\ \text{?}{\left({\lambda }_i\right)}^2\text{?}{\left({\lambda }_i\right)}^2\end{array}.}$ $T_i\left({\lambda }_i\right)=\text{?}-\frac{1}{2},G_i=\text{?},\text{?}=\sin \left(\varphi \right){\theta }_i^{\prime }\left({\lambda }_i\right)-\cos \left(\varphi \right)\text{?}\left({\lambda }_i\right),i\in \left\{1,.Math.,n\right\}$ $\text{?}\text{indicates text missing or illegible when filed}$ generating a graph of the tensions of the thread (8) according to the height between the thread exit point (PS) and the entry point (PE) of the said thread in the twisting area (4), and automatic determination by the software of the optimal height (LB) from the data obtained in the said graph.

5. A thread twisting and/or spinning machine (1) with one or more balloons (B) that applies a process as disclosed in claim 1, that comprises: feeding means (2) of the untwisted thread (8), guiding means (3) that define the thread entry point (PE) at the upper part of a twisting area (4), a cursor that slides on a ring or rocker (6) and that defines the thread exit point (PS) at the lower part of the said twisting area (4), the thread exit point (PS) being mobile in height, and collecting means of the twisted thread, such as a bobbin (5) with a winding diameter (d) of the thread on the bobbin, the distance (LB) being the height of the twisting area (4) located between the thread entry point (PE) and the thread exit point (PS) characterized in that it comprises, movement means (9) in height of guiding means (3) that define the thread entry point (PE).

6. The thread and/or thread spinning machine, according to the claim 5, characterized in that it also comprises collecting means (11) of the diameter (d) of the bobbin (5).

7. The thread twisting and/or thread spinning machine, according to the claim 5, characterized in that the movement means (9) in height of guiding means (3) that define the thread entry point (PE) are an extendable mechanism that allows the movement in vertical direction of the support at which the guiding means (3) of the thread are fixed at the entry point (PE).

8. The thread twisting and/or thread spinning machine, according to the claim 8, characterized in that in addition it comprises mechanical or electrical synchronization means to synchronize the movements of the thread entry point (PE) and of the thread exit point (PS).

9. The thread twisting and/or thread spinning machine, according to claim 5, characterized in that it comprises a specific software installed in an automaton (10) that the movement means (9) and therefore the distance (LB) depend on the winding diameter (d).

Description

DESCRIPTION OF THE DRAWINGS

[0049] To complement this description that is being done and in order to assist to best understanding the characteristics of the invention, attached to this specification, as an integral part thereof, are drawings in which, for illustration and no limitation purpose the following has been represented:

[0050] The FIG. 1.—It shows in an elevation view the schematic representation of the basic elements of a thread twisting machine that intervene in the working or twisting area on which the process object of the invention is applied, showing the arrangement of each of them;

[0051] the FIG. 2.—It shows a schematic elevation view of an example of the thread twisting machine, according to the invention, and an example thereof provided with means for the movement associated of PE and PS for applying the process object of the invention;

[0052] the FIGS. 3-A, and 3B.—It shows both schematic views of the

[0053] working area of the machine to which the process of the invention is applied, represented with the thread entry point PE in raised and lowered position, respectively, to modify the distance LB and counter the variations of the bobbin diameter determined by the movement of the rocker.

PREFERRED EMBODIMENT OF THE INVENTION

[0054] At the sight of the described and unique FIG. 1, and according to the numerals adopted in it, the stated and described in details below can be seen.

[0055] Concretely, in the said FIG. 1, it can be seen how the twisting (1) and/or thread spinning machine (8) to which the process of this invention applies, comprises, untwisted thread feeding means (2), associated to guiding means (3) that define the entry point of the thread (PE) at the upper part of a twisting area (4), and twisted thread colleting means, preferably a bobbin (5), associated to a cursor that slides on an associated ring rocker (6) and that defines the thread exit point (PS) at the lower part of the said twisting area (4), moved by movement means (7), the distance (LB), between the thread entry point (PE) and the thread exit point (PS), being the height of the twisting (4) and working area of the machine (1) where the thread can draw two or more balloons (B).

[0056] The process to set the optimal working height between the thread entry point (PE) and the thread exit point (PS) in a twisting and/or thread spinning machine (1) that operates with two or more balloons (B), comprises a step where the distance (LB) is increased or decreased by dynamically displacing the thread entry point (PE) and/or the thread exit point (PS) so that the variations of tension of the thread (8) produced by the variation of the winding diameter (d) of the thread (8) on the bobbin (5) counter each other, achieving a constant tension on the thread during the working cycle of the spinning or twisting process.

[0057] On its part, in the FIG. 2 an example of twisting and/or thread spinning machine (1) can be seen, adapted to apply the process of the invention, in which, in addition to the above described, it is contemplated to include an extendable mechanism as an example of movement means (9) associated of the points (PE) and (PS), more concretely of the movement (9) in height of the guiding means (3) that define the point (PE), in this case, mechanical, to automatically modify the distance (LB) between the guiding means (3) of the thread at the entry point (PE) and the fastening means (6) of the thread at the exit point (PS) of the twisting area (4), which allows the movement in vertical direction of the support where the said guiding means (3) are fixed.

[0058] Most preferably, the process comprises a step where the distance LB between (PE) and (PS) increases in a given proportion when the thread winding diameter on the bobbin is from most to least (as the rocker is moving), and a step where the distance LB between (PE) and (PS) decreases in a given proportion when the thread winding diameter on the bobbin is from least to most (as the rocker is moving). And the increase or decrease of the said proportion has a value ranging from 0.1% to 300%.

[0059] A practical example is detailed below with real dimensions of spinning work for a continue ring twisting machine according to the FIGS. 3A and 3B:

[0060] The folding format used is that of spinning bobbin. Two states FIG. 3A and FIG. 3B are illustrated in order to show a different positioning of the points (PE) and (PS) and therefore a different LB. In this concrete example, the rocker and therefore the point (PS) is moving at a speed of 1 m/seg. In the state shown in the FIG. 3A where the thread winding diameter (d′) is of 37 millimeters at a height of 60 millimeters with respect to the base of the bobbin, it is worked at a distance (LB′) of 500 millimeters. In the state shown in the FIG. 3B where the thread winding diameter (d″) is of 25 millimeters at a height of 90 millimeters with respect to the base of the bobbin, it is worked at a distance (LB″) of 600 millimeters. Therefore, the proportion that increased LB between the state of the FIG. 3A and the FIG. 3B is LB″/LB′=600/500=1.2.

[0061] In addition, although it was not represented in the figures, the machine (1) comprises mechanical or electrical synchronization means to synchronize the said movements the associated movement means (9) of (PE) and (PS) perform.

[0062] On the other hand, the machine (1) also additionally incorporates a specific software, installed in the automaton (10) that controls the operation thereof and of the said associated movement means (9), for determining the optimal distance (LB) of the twisting area (4) or the distance between the thread exit point (PS) and the thread entry point (PE), according to the above described process, that can also serve as means for synchronizing the said movement.

[0063] In addition, the twisting machine (1) also comprises collecting means (11) of the variation of the working radius and/or of the thread winding diameter (d) of the bobbin (5), determined for example by optical sensors or of other types.

[0064] The nature of this invention being sufficiently disclosed, as well as the way of implementing it, it is not deemed necessary to extend any longer its explanation in order that any person skilled in the art understands its scope and the advantages arising from it.