RU2247656C1 - Device for rubber-cord material bands winding - Google Patents

Abstract

FIELD: equipment for production of tires and mechanical rubber goods.

SUBSTANCE: the invention is dealt with equipment for production of tires and mechanical rubber goods and may be used for winding bands of the rubber-cord material on individual winding sleeves with an adjustable tension. The device for winding bands of the rubber-cord material contains a working shaft mounted on a support and with a drive for its rotation, driving friction clutches, driven winding sleeves and a control sensor. The driving friction clutches are made in the form of the expandable type-setting keys with a drive from an air bladder mounted inside the working shaft. The invention ensures fast and convenient removal of winding sleeves with rolls out of the rubber-cord material from the working shaft.

EFFECT: the invention ensures fast and convenient removal of winding sleeves with rolls out of the rubber-cord material from the working shaft.

2 dwg

Description

The invention relates to equipment for the tire and rubber industry and is intended for winding with adjustable tension bands of rubber-cord material on individual winding sleeves.

A device is known for winding strips of rubber-cord material containing leading clutches mounted on a support, driven winding sleeves (coils) (SU 1742101 A1, class B 29 D 30/38, publ. 06/23/1992, 4s.).

However, this device only winds rubber-cord material into the gasket and does not ensure the accuracy of the geometric parameters of rubber-cord strips (tire parts) necessary for the automated assembly of pneumatic tire tires, because It does not provide the normative value of stretching strips during winding. In the contact winding circuit, either an increased stretching of the rubber-cord material or a loop in front of the winding often takes place, since it is practically impossible to ensure the equality of the linear feed speed of the strips and the peripheral speed of the drive roller, and therefore the formation of wrinkles on the material in the roll, which is an unrecoverable defect . Uneven drawing of the material during winding increases the spread across the strip width, and exceeding its normative value also increases the adhesion of the material to the gasket in the roll. It should also be noted that upon contact of the rolls with friction rollers, there is also a duplication of wound rubber-cord strips with a gasket. This leads to the appearance of stretching strips as a result of their separation from the gasket when applying strips to the assembly drum. In addition, this device has a complex structure, because each driven winding sleeve is mounted on a special pivot arm, with which, before starting work, the winding sleeves are pressed against the friction rollers of the drive shaft. In the case of simultaneous winding onto the driven winding sleeves of a large number of rubber-cord strips, their number, taking into account the standard width of the calender web (≈1400 mm), ranges from 20 to 35 pieces. Such a device will be excessively bulky and difficult to maintain when refueling at the beginning of the winding process.

The closest in technical essence and the achieved effect is a device for winding strips of material containing a working shaft mounted on a support, a drive for rotating the working shaft, driving friction clutch, driven winding sleeves and a control sensor (SU 554032 A1, class B 21 C 47/06, 04/25/1977, 4s.).

In this device, the leading clutches are made in the form of friction discs mounted on the drive shaft between the driven winding sleeves. Friction discs and winding sleeves are pressed against each other by a power cylinder. This device is intended for winding rolls of metal strips, which, after completion of the winding process, collide with driven winding sleeves by a roll collider. Rubber-cord strips after winding rolls are removed and transferred to the next operation together with winding sleeves. In order to remove the rolls with winding sleeves from the shaft, in this case it is necessary to remove the friction rings, which complicates the maintenance of the device and makes it time-consuming.

The present invention solves the problem of providing quick removal of winding sleeves with rolls of rubber cord strips.

To achieve this technical result, in a device for winding strips of rubber-cord material containing a working shaft mounted on a support, a working shaft rotation drive, driving clutches, driven winding sleeves and a control sensor, driving clutches are made in the form of expandable type keys with a pneumatic chamber drive installed inside working shaft.

Distinctive features of the proposed device from the above, closest to it, are the implementation of the leading clutches in the form of expandable type keys with a drive from a pneumatic chamber installed inside the working shaft.

The implementation of the leading clutches in the form of expandable type keys provides for the fixing of the driven winding sleeves along the inner diameter and the necessary contact of the keys with all winding sleeves, which may have small deviations in the size of the inner diameter, and the key drive from the pneumatic chamber installed inside the working shaft allows the keys to move radially, providing slip of sleeves and their free removal from the working shaft.

The proposed device is illustrated by the drawings shown in figures 1-2.

Figure 1 shows a General view of a device for winding strips of rubber-cord material; figure 2 is a section aa of the working shaft.

A device for winding strips of rubber-cord material contains a support 1, in the brackets 2 of which an axis 3 is mounted for rotation, rigidly connected to the housing 4. In the housing 4, a working shaft 6 is mounted on the bearings 5.

In the described embodiment of the device, an insert 7 is mounted inside the working shaft 6, on which pneumatic chambers 9 are mounted using clamping plates 8. In the slots of the working shaft 6, pneumatic chambers 9 are equipped with drive clutches in the form of sliding friction keys 10 made of elements 11. On the working shaft 6 has driven winding sleeves 12. At the end of the working shaft from the side of the support 1, an air supply sleeve 13 is installed, and a conical sleeve 14 with grooves 15 is fixed at the cantilever end.

An additional support 16 is mounted on the side of the cantilever end of the working shaft 6, on which the drive shaft 19 is mounted on bearings 18 coaxially to the working shaft 6 in the housing 17 and inside the drive shaft 19 from the side of the working shaft 6, an axially movable piston 20 with a cone 21 and splines is mounted 22, corresponding to the conical sleeve 14 and the grooves 15. An air supply sleeve 23 is mounted on the other end of the drive shaft 19. To return the piston 20 to its original position, there is a spring 24. The drive shaft 19 is connected to the rotation drive (not shown in the drawings cauldron) through an asterisk 25.

The control sensor is made in the form of a diameter sensor 26 of the roll 27. The diameter sensor 26 of the roll in the described example is ultrasonic and is connected to the air supply system to the pneumatic chamber 9 and to the shaft rotation drive.

A device for winding strips of rubber-cord material works as follows.

Winding sleeves 12 are put on the working shaft 6. The working shaft 6 is rotated on the axis 7 in a horizontal plane and mounted coaxially with the drive shaft 19. Air is supplied through the air supply sleeve 23 inside the drive shaft 19 and the piston 20 extends to the working shaft 6. In this case, the cone 21 and the slots 22 interact with the conical sleeve 14 and the grooves 15, forming a two-support structure from two shafts. In the pneumatic chamber 9 through the air supply sleeve 13, air is supplied. The elements 11 of the sliding friction keys 10 are moved apart and fix the winding sleeves 12 on the working shaft 6. By adjusting the pressure in the pneumatic chambers 9, the necessary friction force is set between the friction keys 10 and the winding sleeves 12. The friction force is usually determined by the type of material and the requirements for limiting tension during winding.

Then, on the winding sleeves 12, the ends of the wound strips are fixed. Shafts 6 and 19 are driven through an asterisk 25. Moreover, the speed of rotation of the shafts changes as the diameter of the rolls increases and is set using an ultrasonic sensor 26. Moreover, the linear speed of winding the strips always exceeds the linear feed speed of the strips.

The difference in linear speeds is equalized due to slippage of the winding sleeves 12 relative to the working shaft 6. This principle of winding allows you to choose individual slack and sagging stripes when they are fed.

To create the required tension of the tape material during the winding process, the ultrasonic sensor 26 regulates the air pressure in the pneumatic chambers 9 and thereby changes the friction force between the friction keys 10 and the winding sleeves 12, which, in turn, allows you to adjust the torque on the working shaft 6, and it means the tension force of the strips during the winding process.

After completing the winding of the strips into rolls, the air supplied inside the drive shaft 19 is turned off, the piston 20 is discharged by the spring 24 to its original position, the working shaft 6 is rotated around axis 3, the pressure in the pneumatic chambers 9 is turned off, the winding sleeves 12 with rolls 27 are removed from the working shaft 6.

Then the winding cycle is repeated.

Claims (1)

A device for winding strips of rubber-cord material containing a working shaft mounted on a support, a working shaft rotation drive, driving friction clutch, driven winding sleeves and a control sensor, characterized in that the driving friction clutch is made in the form of expandable type keys with a drive from a pneumatic chamber installed inside the working shaft .

Images