SU1712185A1 - Machine for making shaped rubber workpieces - Google Patents

Abstract

The invention relates to the chemical industry, in particular to the processing of elastomers, and can be used for the forced shrinkage of a polymeric material, in particular, profiled rubber blanks for tire production. The purpose of the invention is to expand the technological capabilities of the device. The working surface of the slab is made with transverse corrugations along the movement of the workpieces, the distance between adjacent vertices of which is two times smaller than the width of the slab, and the slab is connected to the base by means of an elastic corrugation. The lever system is equipped with a pull that is hingedly connected to the vibroelement and with levers of different size. 1 h. n. f-ly, 5 ill.

Description

The invention relates to the chemical industry, namely to the processing of elastomers, and can be used to force a polymer to shrink, in particular, to shaped rubber tires.

A device for forced

shrinkage of pneumatic tire treads,

which contains the vehicle

in the form of vibrolots and the system of scented

nozzles.

However, this technical solution does not adequately ensure full fixed shrinkage of the workpiece, since the mechanical contacts of the vibrating tracks with the supporting surface of the tape prevent the maximum removal of residual internal stresses in the rubber compound. Shrinkage of the material in the system proceeds mainly only through the thickness of the polymer web.

The closest to the proposed technical essence and the achieved effect is a device for making

profiled rubber blanks, containing a mechanism for profiling rubber blanks, a chamber for shrinking rubber blanks in the form of a means for creating a dynamic cushion and a plate with openings for the release of the working agent, mounted on the base of a vibroelement, pivotally connected by means of a lever system with a plate and means for further heat treatment blanks and cutting them.

A disadvantage of the known technical solution is the impossibility of processing a sufficiently thin polymer web in the vertical pneumatic vibration box. The latter circumstance is due to the danger of the possible folding of a thin web in a box with its extremely large working section through passage. In this device difficult to post a thin polymer web along the longitudinal axis of the box. In addition, since the magnitude of the elastic recovery decreases as it is processed, the intense forced oscillations on

leaving the box creates the prerequisites for transfer (deformation) of the profiled l; entz ,,;

The purpose of the invention is to expand the technological capabilities of the device.

This goal is achieved by the fact that the working surface of the slab is made with transverse corrugations along the movement of the workpieces, the distance between adjacent vertices of which is two times smaller than the width of the slab, and the slab is connected to the base by means of elastic corrugations, and the lever system is hinged and articulated with vibroeleumitis and with different-sized levers.

.In FIG. 1 shows the device, obsh, iy view; in fig. 2 - camera for shrinkage; in fig. 3 - the same, in axonometric projection; in fig. 4 - view of the lever system; in fig. 5 - what is on league. 2, top view.

The device contains a mechanism for profiling rubber blanks in the form of a nific-machine 1, a chamber 2 for shrinking rubber blanks in the form of a means 3 for arranging a dynamic cushion and a plate 4 with only 5 for exiting the working agent mounted on the base vibroelectric element 6 is connected with a lever system 7. and 8 with a plate 4 and means 9 .. 1 to mark the bearing surface of the workpiece) and to ..1. neeva composition, means 10 for l.a.the most thermal processing of blanks in the form of means for Drying and Cooling Products and Cutting Tools II goods. The working surface of the plate 4 is elongated with corrugations a transverse in the course of movement of the blanks, the distance between adjacent vertices of which is two times smaller than the width L of the pitites 4. The plate 4 is connected to the base by means of elastic corrugation 12. The lever system 7 and 8 is equipped with a pull 13, pivotally connected to the bis vibroelement by levers 7 and 8, which are made of different sizes.

T ha-13, levers 7, 8 and plate 4 flexibly fit together with each other in the longitudinal direction using hinges 14-17, with the levers 7 and 8 being hinged respectively on axles 18 and 19, which are rigidly connected to by measure 2. In the initial processing area, the distance from the hinge 14 to the axis 18 of the lever 1 is 7 more than the distance from the hinge 15 to the axis 19 of the lever 8 on the final section of the device (Fig. 4) .. The hinges 16 and 17 are located; at equal distances, respectively, from the axes 18 and 19. For the orientation of the fabric to be shrunk along the longitudinal axis of symmetry of the device, restricts the elements, such as the system of air nozzles (not tyukazany).

The operation of the device is presented on the example of the operation of the tread assembly for the manufacture of profiled polymer material blanks.

The polymer material 20 from the core of the syringe machine 1 (Fig. 1) is fed to shrink on the working surface of the plate 4 of the device. The air through the means 3 is injected into the chamber 2, from where through the system of through supply holes 5 falls under the polymeric material 20 and creates an air gap. In this case, the workpiece is oriented along the longitudinal axis of the device (Fig. 2). The vibrocell 6, which performs forced harmonic oscillations, by means of pulling 13 and levers 7 and 8, transfers oscillations to the base plate 4. Since plate 4 is connected to chamber 2 by means of elastic corrugations 12, plate 4 is a harmoniously oscillating plane. Since the distance from the fixed axes 18 and 19, respectively, to the hinges 14 and 15 is different, and the same to the hinges 16 and 17, the magnitude of the plate oscillation along its length is different. At the initial

0 plot of the treatment area, when the shrinkage process is most dynamic, the amplitude of oscillation is maximum. Further, in the direction of transport and the degree of processing, when the intensity of the elastic recovery decreases, the amplitude of oscillation decreases linearly. Moving along the undulating bearing surface of the plate 4, the material 20 shrinks due to the force of viscous friction in the air gap and the dynamic effect of the convex portions of the plate 4. Making the distance between the vertices of the convex portions of the wave-like surface of the plate 4 twice as small as possible allows for the most uniform dynamic effect of oscillations in the longitudinal direction towards the movement of the canvas. Next, the seated tread band enters the node 9 of the pro-lubricant of the bearing surface with an adhesive composition. Since the tread material 20 is processed

Q, with a free hang on a dynamic air cushion, it is reasonable to use pneumatic conveyors with a carrier layer as transport systems of the adjacent process equipment. After drying the adhesive coating and cooling the air cushion, respectively, in the means 10, the protector is cut in the cutting mechanism 17 into dimensional blanks.

The magnitude of the circular vibration frequency of the vibroelement 6 is selected in such a way

This means that given the geometrical parameters of different-sized levers 7, 8 and the speed of extrusion, a continuous dynamic effect of the convex portions of the wave-like plate 4 on the material to be shrunk is provided.

Using the wave-like plate 4 as a harmonically oscillating plane when processing the tread band on the air gap allows

achieve a fixed shrinkage of the web both in the longitudinal-transverse direction and through the thickness of the workpiece. In addition, the design parameters of the vibrating drive's cinematic mechanism provide the necessary degree of intensity of the deformation process of an already seated profile blank as a result of the vibration effect of the harmonically oscillating plane of the plate in the final section of the device.

The temperature of the air entering in; pneumocamera, installed in the appropriate; VII with the requirements of a rational weave shrinkage process in a rubber material.

The amplitude of the forced vibrations, the magnitude of the circular frequency of the plate oscillations and its angle of inclination to the horizon, as well as the air flow, are chosen depending on the formulation of the polymer web, the processing modes and the requirements for m products made from it.

Claims (2)

Invention Formula I. A device for making profiled rubber blanks, comprising a mechanism for profiling rubber blanks, a chamber for shrinking rubber blanks in the form of a means for creating a dynamic feeder and a plate with openings for the release of the working agent, mounted on the base of a vibroelement pivotally connected by means of a lever system 0 with a plate, and means for further heat treatment of the blanks and their cutting, characterized in that, in order to expand the technological capabilities of the device, the working surface of the plinth plate is made with transverse corrugations in the course of movement of the blanks, the distance between adjacent vertices is selected twice smaller plate width. Moreover, the plate is connected to the base by means of elastic corrugations. 2. The device according to claim 1, characterized by 0 that the lever system is equipped with a pull that is pivotally connected to the vibroelement and with levers of different size. ///// //////// 20 Z c Air} ( 1 eight g / J Shchi2.1 FIG.