SU704816A1 - Thread laying apparatus in an arrangement for making blanks for pneumatic tyre covers - Google Patents

Description

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The invention relates to the manufacture of pneumatic tires and can be used in the production and assembly areas of tire plants.

The known laying guide to a device for the manufacture of blanks for parts of tires of pneumatic tires, is made in the form of a reciprocating movable head, interacting with a rotating hand wheel, which specifies the law of displacement of the head in accordance with the trajectory of the laid rubberized thread.

The disadvantage of this device is that it puts the cutting thread directly onto the non-vulcanized rubber interlayer, as a result of which the precise laying of the thread does not ensure the shape of the outer surface of the interlayer from the required cylindrical shape of the breaker in the process of scrolling and premature gluing of the thread to the rubber interlayer before laying on her thread for a given trajectory.

This disadvantage is eliminated in another well-known thread laying machine that contains a cylindrical swath with rabbi | r1u located on its circumference spring-loaded radial pin mn, yCTjMOBrteHHbiMH in the guide slots of the working roll surface, and a returnable movable head 2.

The specified thread guide can not provide high performance stacking thread, because The inertial forces arising from an abrupt change in the direction of movement of the head do not allow an increase in the speed of its movement, and consequently, the speed of laying the thread.,, /

The purpose of the present invention is to increase the production rate of the piling process.

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This goal is achieved by the fact that the guides of the grooves are made along the length of the working surface of the roll along its forming, and the radial shtyrn made movable along the roll and equipped with reciprocating movement located inside its drives.

Claims (2)

Such an implementation of the thread guide allows the thread to be laid non-reciprocally by knocking {) by spinning Golovkin with separate straight line spacing of the pins and, therefore, excluding the head from the thread stringer design. FIG. 1 shows a hanging thread grouper, and FIG. 2 - section AAA fig. 1, in FIG. 3 shows a section BB in FIG. 1, in FIG. 4-7 - the position of the pins in the process of working thread clamp, in FIG. 8 - possible paths of laying the thread. The grain guide contains a cylindrical roller 1, along the working surface of which, along the generatrix, guide grooves a are made, evenly spaced around the circumference of the roll. Radial pins 2 (one in each groove) are installed in the guide grooves, equipped with actuators 3, for example, pneumatic cylinders placed inside roller 1 and designed to move the rods along the shaft. The pins are in the radial direction. Springs are spring 4. Of the total number of feet 2, half of them are on the left edge of the roll (the pins of the left row) and occupy half of the Circle; the other half of the number of cranks is on the right edge of the roll 1 (the bars of the right-hand row) and, accordingly, draws the second half of the circle. The proposed stacker works as follows. When making a breaker with a width of B with a zig zagging arrangement of the trimmed thread in it, the latter must be moved back and forth along the generatrix of the rotating roll by the B value: first from left to right, and then sgfraf to the left. ..---. With the rotation of the roll every 1 tyr | 2 begins translational motion along the forming roll 1, with one point of angular position: relative to the vertical plane, captures the rubberized thread 5, 1 6 of the tangent roll surface, and ends the movement with the thread when the roll is turned through a certain angle. The movement of the pin in the forward slot (movement in the axial direction) is provided by the actuator 3. In FIG. 4 shows the initial position of the pins 2 and the yarn 5 captured by one of them, and FIG. 5, 6 and 7 - the positions of the pins and thread when the roll is rotated by 60 °, 120 and 180 ° respectively relative to the initial position, and the movement of the thread from left to right occurs with a pin of the left row. Arrows 64 designate the direction of rotation of the roller I, the drum 7 and the movement of the thread 5. Similarly, the movement of the thread is performed from right to left, but already during the movement of the tongues of the right row. Each pin moves the thread by the value of V / p, where B is the breaker width; n -, the number of shtyry one type of yes. Thus, one cycle of the reciprocating movement of the thread along the forming roller is alternately carried out pin 2 for one revolution of the roll. The thread laid on the swath comes into contact with the rubber backing 6, lying on the rotating drum 7 (or lying on the moving conveyor) and rolling onto it. The plugs then return to their original position. In the described device, each shtyryer pushes the thread by one and the same value, while the course of the shtyry itself (and, therefore, the course of the pneumatic cylinder is different) is different. To ensure the same magnitude of the stroke of the shtyry, it is necessary to position the latter in the initial position not along the edges of the roll, but along a line identical to the path of laying the thread in the breakers .. The laying layer provides for laying the thread along different trajectories m (see Fig. 8) with high performance. Claims of the invention The nite-laying machine for a device for the manufacture of blanks of tires pneumatic tires Shchiny, containing a cylindrical roller with evenly spaced around its circumference spring-loaded radial shchiryi installed in the guide grooves of the working surface of the roll, which is in order to increase the productivity of the process of laying the thread, the niravl jutshe grooves are made along the length of the working surface of the roll along its generatrix, and the radial pins are made movable along the roll and provided inside its reciprocating drives. Sources of information taken into account in the examination 1. US Patent N 37-21599, cl. 156-394, published. 1973. 2. USSR author's certificate N 558477, cl. In 29 H 17/28, 1974 (prototype). A-A B ft FshA FIG. five Fi & .2