SU1567681A1 - Thread tension device to high speed warp knitting machine - Google Patents

Abstract

The invention relates to the knitting machine building industry, in particular, to the stretching devices of the basics of filling machines, and allows to increase the efficiency of these devices by providing compensation for consumption and maintaining the constant tension of the base at high speeds in the undercarriage, as well as when the machine is stopped and started. . The thread-tensioning device for a high-speed warping machine contains a tensioning rock 4 fixed on rods 5 with platforms 6, made of a material having a low density, and an elastic element made in the form of a cylindrical chamber 1 filled with compressed air with a thin rubber shell 2 , with evenly spaced fingers 3, sensing the pressure of the warp threads by means of a rock 4. Chamber 1 is enclosed in a hard casing 7 with covers 8. 1 c.p. f-ly, 2 ill.

Description

one

(21) 4399394 / 31-12

(22) 03/28/88

(46) 05.30.90. Bul K 20

(71) Kiev Technological Institute of Light Industry

(72) .A.Moiseenko and O.K.Troynikova

(53) 677.055 (088.8)

(56) USSR Certificate of Autonomy, No. 144256, cl. D 04 B 27/14, 1962.

(54) FITTING INSTRUMENT TO FAST-BASED FIXED MACHINE

(57) The invention relates to the knitting machine building industry, in particular, to the nitrating devices of the basics - hall machines, and makes it possible to increase the efficiency of these devices by providing compensation for consumption and maintaining the tension of the base yarns at high speeds in the undercarriage, as well as when stopping and starting the car. A threading device for a high-speed warping base - a filling machine contains tension rock 4, mounted on rods 5 with platforms 6, made of a material having a low density, and an elastic element, filled in the form of a cylindrical chamber 1 filled with compressed air, with a thin rubber shell 2, with the fingers being evenly spaced along the entire length 3, perceiving the pressure of the warp threads through the rock 4. Chamber 1 is enclosed in a hard casing 7 with covers of 8. 1 z.p, f-ly, 2 ill.

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The invention relates to the field of knitting machine building, namely to thread devices of high-speed bases of hall machines.

The aim of the invention is to increase the efficiency of the device by providing Compensation of consumption and maintaining a constant tension of the warp threads at high speeds in the core.

FIG. 1 shows a diagram of a thread-tension device for a high-speed warping machine (cross section); Fig. 2 is a diagram of a general view of a nitrating device to a high-speed warping base.

The thread-tight device for the high-speed warping machine contains an elastic element made in the form of a cylindrical chamber 1 with a thin elastic, for example, rubber sheath 2 with fingers 3, evenly spaced along the entire length along the generator of the cylinder from the side of Lsalo 4 fixed to the rods 5 with stops (pads) 6. Chamber 1 is enclosed in a rigid casing 7 with covers 8 and is filled with compressed air. A nitrate separator ridge 9 and a thread guide roller 10 are installed in front of the filament rock, which provides the necessary angle of grip with rock nests 11 of the base. The elastic element contains the duct 12 and the pressure gauge 13.

The threading device operates as follows.

The warp threads 11 pass between the teeth of the thread separator ridge 9, over the rock 4, and are directed to the loop-forming organs of the machine. The resulting force of pressure of the warp threads on the rock must be directed along the rods 5, for which it is necessary to observe a certain amount of angles formed by the warp branches and the rods of the warp branches moving and falling from the rock 5. To this end, the warp threads pass along the thread guide roller ten.

With an increase in tension of the threads 11 of the base, the rock 4 descends, moving down the rods 5 with the stops 6, as a result of which the pressure on the fingers of the chamber 1 decreases, the volume of the latter and the air pressure in the chamber increases. While mixing, the rock 4 down is compensated for the lack of length of the thread in the loop formation zone and decreases

0

five

0

five

0

tension the threads to a given. When the tension of the warp threads decreases as a result of the excess warp threads in the loop formation zone, the rods 5 with the stops 6 and, together with them, the rock 4 rises under the action of the difference in pressure of the elastic element on the stops 6 and the pressure of the warp threads on the rock 4. When moving the rock up the excess of the spine of the warp threads in the loop formation zone is compensated and the tension of the warp threads increases to the set value. The air pressure in chamber 1 is controlled by a pressure gauge 13.

Changes in the tension of the warp threads can be minimal, which is confirmed by the following example and calculation.

If we assume that the volume of chamber 1 without fingers is equal to v, the volume of each finger 3 at an average position of 4 V3, the number of fingers n, the area of each pad 6 S, the air pressure in the chamber 1 P, the warp threads F, then camera 1 with fingers 3 equals

V V, + n V3. (1)

Let the tension of the warp threads increase by / jF and become (F + L F), then the rock 4 will fall together with the pads 6 so that the volume of the fingers 3 will decrease by each, and the total volume of the chamber will be

V V, + n (V3 - DN3), (2) and the air pressure in the chamber will increase;

(R + LR. (3)

According to the equation of state of an ideal Mendeleev-Clapeyron gas

PV

five

(p + dP) tv, + n (v3 - / nyj Ј RT,

(4) where M is the mass of gas,

molar mass, hacha, universal gas constant, absolute gas temperature.

H R

T

PV

Since the values of M, and, P, T for the latter case are constant, then (P, + n (V -JV) const,

(5) From equation (5)

(6)

PLU DR

v R DR

The tension of the tension of the isps is transferred to the hot, raspn 1

the force of air pressure in chamber 1 at sites 6, i.e.

F Pn S; (7)

DG - drp S. (8)

Then equation (6) takes the form

rulVj, 4F V F ™ DG From equation (9)

it's obvious that

The volumes of the V and V chambers can be chosen in such a way that the changes in JF of the tension of the warp threads were minimal.

The use of a nitrating device will make it possible to compensate for the consumption and maintain the tension of the warp threads. It is known that the tension of the warp threads varies considerably in the loop formation cycle. These changes can reach 0.20 N, i.e. five times the optimum tension. Since the length of the thread in the loop, which is the main parameter that determines the structure and properties of knitwear, depends mainly on the tension of the warp threads, maintaining their constant tension will ensure an increase in the stability of the knitwear structure parameters, including at high speeds.

-tx}

and t

in unsteady modes, e. at stop and start

Claims (1)

1. A thread-tensioning device for a high-speed warping base, a coil holding a tension rock, made of a material having low elasticity, and an elastic element, characterized in that, in order to increase the efficiency of ... expense of providing compensation for consumption and maintaining, constant tension of the warp threads at high speeds in the underside, the elastic element is designed as a cylindrical chamber. 2Q is made of thin elastic material filled with compressed air, while the elastic element on the rock side has evenly spaced fingers along the cylinder, which interact with the rock through rods supporting the latter. 2, the device according to claim 1, about tl and h ayi with the fact that the elastic element is enclosed in a casing.