RU5758U1 - RAW PROTECTOR TAPE ERROR DEVICE - Google Patents

Abstract

A device for studding a wet tread strip, mainly for producing a winter tire, comprising a table for accommodating a tread, at least one guide with a cutting edge for forming an opening in the center of the tread piece for installing an anti-skid stud, characterized in that it is provided with a support for pressing made in the form a raw tread tape having through holes in which anti-skid spikes are located, pushed by the pushers towards the tape, while the pushers are spring-loaded relative to the support to return to its original position after the studs are deepened into the tape, and the table is made with through holes, coaxial support holes in which the specified guides are located, with the possibility of reciprocating movement, facing the cutting edge towards the studs, and nests are made in the area of the cutting edges for placement protruding above the tread of the spike.

Description

RAW PROTECTOR ERROR DEVICE

The utility model relates to the tire industry and relates to the manufacture of studded tires for wheeled vehicles used to increase adhesion to the supporting surface when dvizhenii in the winter season. The utility model considers technological equipment devices intended for oriented mounting made in the form of bodies of rotation of anti-skid studs in a wet tread band.

A known method of manufacturing a winter tire, which consists in assembling a crude tire on technological equipment with its subsequent vulcanization, performing technological drilling in tread blocks, which function as lugs, and introducing anti-skid spikes into these holes with their subsequent fixing in blocks, for example, by inserting it into the holes powder paint based on a thermosetting film former (see SU, ed. St. N 1669770, B60C11 / 14, publ. 1991).

The disadvantage of this method of manufacturing studded tires for the winter period of operation is that the implementation of drilling into the finished product after vulcanization leads to a violation of the integrity of the body of the checker and internal connections in the tread rubber. Insert stud into hole 1

IPCb: B29D30 / 66

TAPES

exacerbates the deformation processes in the rubber stretched around the hole, leads to premature failure of the stud fastening bonds with the rubber layer surrounding it, which, as a result of drying, significantly affects the stud fastening reliability in the cap. In addition, when the wheel is rolling, sushi, a significant change in the shape of the checker, as it affects not only radial forces, but also lateral shear forces. In this regard, to exclude the loss of the spike, the latter is equipped with highly developed bases that have a destructive effect on the layers of the frame and the breaker.

To eliminate these shortcomings, a method was developed for introducing anti-skid elements at the stage of manufacturing a crude tire, followed by fixing these elements in the tread surface during vulcanization.

One of such methods for manufacturing a winter tire is known, which consists in collecting a crude tire on technological equipment, in the mold of the vulcanizer, anti-skid elements are placed in the annular nests of the tread pattern; prunsin-type joints, put the raw tire in the mold and vulcanize it , during which tread rubber envelops anti-skid elements (see US patent N 2808621, B29H17 / 38 according to the 3rd edition of the IPC, 18-38, publ. 1957).

A feature of this method is that the anti-skid elements made in the form of small arms; in, in a chaotic manner are fixed in the nests of the tread

mold pattern due to its compression and bursting between the elements of the nest, forming the tread grooves. After the manufacture of the tire, the springs are not visible, since they are inside the checkers, they are manifested, they appear only as the tread wears out.

A device is known for studding a tire tread for producing winter boots, comprising a table for installing an article having a tread guide with a cutting edge for forming an opening in the tread block and a feed mechanism for anti-skid studs for installing them in the holes made in the blocks (see JP, application N 6128524, B60C11 / 16, B29D30 / 66, 1986).

The disadvantages of this device are indicated in relation to the previously described method of studding tires.

This technical one is a prototype.

The disadvantage of this method is the high complexity of tire preparation due to the difficulty of filling the mold of the vulcanizer and the consequent great loss of time. In addition, this tire does not acquire the properties of a winter tire that improves adhesion to a support surface with a low coefficient of adhesion, but tires with a tread reinforced by wear, the performance of which in terms of adhesion is no different from the standard non-studded one. The chaotic order of placement of the springs in the checkers leads to premature destruction of the tread, since when

The springs located in this way do not act uniformly on the checker, but locally in the same direction. If we take into account that while the turns of the springs wear out as well, the sharp edges of the spring in the wear zone damage the rubber of the notch. According to this method, it is impossible to manufacture a tire with w: anti-slip types made, for example, in the form of bodies of revolution.

There is a method of studding the tread rubber of an assembled tire, which consists in loading the anti-skid elements in the form of bent wires into a wet tread, fixing them in rubber due to mechanical connection so that the ends of the bent wires protrude outward (see US Patent N 2865054, B29H17 / 38 according to third edition, 18-59, 1958).

For reliable fastening of the anti-skid elements in the tread rubber before vulcanization in the checkers of the molding surface of the mold in those places where the anti-skid elements will be located, a rubber plate is laid in the form of a checker. During vulcanization, the tread rubber of the assembled tire and the indicated rubber plates interact, as a result of which the wire is securely attached to the latch bird.

The disadvantage of this method is its complexity, low productivity, the inaccuracy of the position of the anti-skid elements in view of the weak fixation of the ropes at the initial stage in the tread rubber. As a result, when a raw studded tire is placed in the mold,

the convergence (curvature) of the tenon itself and its displacement relative to the initial position. This method is not intended and cannot be used for the production of P1I.N with anti-skid types in the form of bodies of revolution, which are widely used today.

A device for studding the tread P1ina to obtain a winter tire is known, comprising a table for installing an article having a tread, a guide with a cutting edge to form an opening in the tread block and a feed mechanism for anti-skid studs for their installation

in drafts made in checkers weighed (see U patent 1Y 2051809, B60CII / I6, publ. B January 1996).

The disadvantages of this device are listed above.

in relation to the previously described method of tire fitting of yagins.

This technical solution was made as a prototype.

This useful model solves the technical problem of measuring the manufacturing process of a winter tire by introducing spikes, which are a standard element in the body of the revolution, into the wet tread rubber during: assembly and with their fixed fixation in the rubber so that the assembled crude tire enters the press - mold of the vulcanizer in studded condition and with correctly oriented spikes. The technical effect achieved in this case consists in increasing the manufacturability of manufacturing, reducing the production time due to the possibility of automating the process and improving the quality of the manufactured studded tire, and

the effect also lies in the high reliability and durability of the winter tire studded in this way.

The indicated technical effect is ensured by the fact that the device for OP1I11OVA of the P1ina tread for winter P1INA, comprising a table for placing the tread, at least one guide with a cutting edge to form a hole in the center of the tread block for installing the anti-skid tire, to improve the quality of the mounting and studs device equipped with a support for the slope made in the form of a raw tread tape having through holes in which anti-skid gears are located, pushed to the side by pushers the tapes, while the pushers are sub-rucked relative to the support for returning to the initial position after the studs are deepened into the tape, and the table is made with through holes, coaxial holes of the support, in which the aforementioned are arranged

guides facing the cutting edge towards the spikes and in the area of the cutting edges of which the slots are made to accommodate the part of the spike protruding above the tread.

These features are significant and interconnected with each other with the formation of a set of essential features sufficient to obtain the desired technical result.

Thus, the removal of the guide, brought into contact with the stud, and the simultaneous movement of the stud in the direction of extraction of the guide can eliminate the operation

expanding the slotted hole and introducing a curly spike into it. At the same time, the thorn between the guide and the element is exerted; you exert pressure on it, it remains strictly oriented, does not mix, and without distortion is tightly clamped with the recess.

The insisted utility model is illustrated by a concrete example, which, however, is not the only possible one, but clearly demonstrates the possibility of achieving the required technical result by the indicated combination of features.

In FIG. 1 shows a raw tire tread busbar device and shows the initial position of the busbar elements;

In FIG. 2 shows the position of the busbar elements when cutting a hole .;

In FIG. 3 shows the insertion of an anti-skid stud into the hole;

In FIG. 4 shows the final position of the stud elements.

In the manufacture of winter mud, the crude tire is collected in the usual standard manner until the tread tape is laid. Geometrical centers of the checkers are projected on the tread strip.

the geometric centers of the checkers of the mold matrix of the vulcanizer. This operation is quite feasible both by simply copying the picture of the finished product, and in terms of transferring these centers from the matrix to the tape, using

principle of similarity. This is possible due to the fact that inside the mold, the pressure during pressing and vulcanization is equally distributed in all directions and, therefore, there is a significant displacement

projected on the tape the center of the checker from the actual center of the socket P1ap1ki in the mold.

After obtaining the points of the geometric centers of the pieces in which the anti-skid studs will be placed: using any known method, the anti-skid studs are introduced into the body of the rubber of the tread band and then fixed on the base of this band. In this way, the studded tread band is assembled, which is placed on the tire during final assembly.

After that, the crude tire is placed in the mold of the vulcanizer. When placing: the tires make an angular correction due to a small turn of the tire supplied by the cartridge around its rotational quick release valve in order to precisely orient any checker spike or just the geometrical center of any checker with its corresponding socket in the vulcanizer mold. This is necessary so that the spike in the finished product is located in the cap, if not exactly in the center of the checker, then at least in its central zone.

To perform this operation, it is necessary to introduce, for example, a rotary poloekenie of the feed mechanism cartridge around a vertical axis with its subsequent fixation in

given the selected angular position. And on the vulcanizer nress-form should: be a mark or a device for transmitting vertical projections of the geometric centers of the matrix nests under the shafts. At the same time, those nests for tread caps in the mold that are equipped with anti-skid studs should be increased in depth by the standard size of the protruding part of the anti-skid stud.

After placing the crude tire in the vulcanizer, a vulcanization process is carried out using conventional technology. The operation of extracting the finished product also has not changed.

A tire made with the described method with anti-skid studs has high operational reliability and durability. This is due to the fact that during the installation of the studs there is no mechanical damage to the rubber layers, as is the case when the studs are introduced into the finished product. The anti-skid spike itself can: be simple in design, since its bonds with rubber are formed not by artificial measures, for example, with glue, paint developed on surfaces, protrusions, antennae, etc., but by natural interaction, due to vulcanization. At the same time, the automated cycle of tire assembly and manufacturing was saved without involving manual labor.

The OSHIPOVKR1 device of a raw tread before laying it on a bird stock is shown in FIG. 1. This device includes a table 1, on which is laid

raw tread tape 2. In the table, vertical through holes are made either along the entire length and H1irin, or in a separate section, in which there are guide rails 3 mounted with the possibility of movement P (for example, a power cylinder) from the action of force and representing cutters with a cutting edge in the direction of the tread strip having a seat socket 4, shape and size corresponding to the anti-skid stud 5.

The tread band 2 is pressed by a support 6, also having through vertical holes coaxial with the holes of the table 1 and into which anti-skid spikes 5 are placed. The spikes 5 are attached under the influence of the force PI, transmitted through the pushers 7, to the tread band. The base of 1 pip is facing the pushers. The pushers are equipped with springs 8, which ensure the automatic return of the pushers after the Pi has been removed (for example, the AWGL cylinder).

Guides 3 for cutting holes in a wet tread strip are located: hen in places corresponding to the centers of future tread blocks. This arrangement can be made all over the table to obtain simultaneous hole cutting along the entire length of the tread band. This example is shown in FIG. 1. But it is possible that the guides are mounted for a separate local section of the tape and after cutting

holes and installation of studs, the tape moves step by step to repeat these operations in another local area.

The studding of the tread strip before it is laid on the blank of the tire asush is carried out as follows. After laying the tape on the table 1 and refueling the holes of the support 6 with spikes 5 (this is the initial poloekeniya shown in Fig. 1), they tighten, guide 3 with the force P and, moving them towards the tape 2, pierce the holes in the tape (see Fig. 2). Shpms 5 are inserted into the landing slots of 4 modes, which are guided by the edges of the guides and remain in this contact due to the loading of the pushers with the force Pi. The force Pi can be either equal to the force P, or slightly less than the force P. The difference in the forces or their equality is determined from the condition of ensuring tight contact of the spike with the socket and preventing the hole from being punctured.

After the holes are punctured, the force P is removed or gradually removed to ensure that the force PI is exceeded above P (see Fig. 3). As a result of this, the pushers 7 begin to move the spikes 5 together with the guides 3 brought into contact with them. The spikes are laid in the holes of the tape 2 with a gradual compression by their rubber as the guides come out of the holes.

After the stud has completely bent into the hole, the PI force is removed or decreases until the force of the spring 8 begins to exceed the force PL. Under the influence of the spring, the pusher comes out of contact with P1iii 5 (see Fig. 4). When removing support 6 for subsequent refueling with spikes

5, the studded tread tape supplied for subsequent assembly is replaced with a new tape to be studded.

Attention is drawn to the fact that when performing the operation of FIG. 3 it is possible to forcefully remove the guide by the power element. Then the force Pi will provide the feed through the pusher gigga in the tape 2.

A true utility model will increase

manufacturability, will reduce manufacturing time due to the ability to automate the process and improve the quality of 1 / prepared studded mud, and takuke will provide high reliability and durability of the winter tire studded in this way.

Claims (1)

A device for studding a wet tread strip, mainly for producing a winter tire, comprising a table for accommodating a tread, at least one guide with a cutting edge for forming an opening in the center of the tread piece for installing an anti-skid stud, characterized in that it is provided with a support for pressing made in the form a raw tread tape having through holes in which anti-skid spikes are located, pushed by the pushers towards the tape, while the pushers are spring-loaded relative to the support to return to its original position after deepening the spikes into the tape, and the table is made with through holes, coaxial holes of the support, in which the specified guides are located, with the possibility of reciprocating movement, facing the cutting edge towards the spikes, and nests are made in the area of the cutting edges for placement protruding above the tread part of the spike.