CN100532077C - Method for filling tyre wired ring gap and its oblique crossing large tyre - Google Patents

Abstract

The invention discloses a seam filling method of a tire steel wire ring and a heterotropic giant embryo, wherein, the producing method of the prior art need not to be changed and the producing method of the invention differs from the prior method in that: after being reversely packed by a plurality of steel wire rings inside a tire ring through a carcass, the almost triangular seam position between the bottoms of the steel wire rings being reversely packed is added with a filling gasket for filling the actual seam. The cross section of the filling gasket takes a shape of an isoceles triangle, the bottom edge width thereof is within 10mm to 20mm and the height thereof is within 8mm to 12mm. The filling gasket is integrated with the tire after the tire is vulcanized. The seam position of the reversely packed steel wire of the carcass takes a shape of filling gasket. Under the circumstance that no device and producing investment are added, the invention ensures that the shape of a produced seal allowance meets the designed requirements. The heterotropic giant embryo configured with the method of the invention has the advantages of high intensity of the seam allowance and high bearable load, etc.

Description

The fill method of tyre wired ring gap and oblique crossing large tyre thereof

(1) technical field:

The present invention relates to a kind of tire production method, particularly the fill method of tyre wired ring gap and oblique crossing large tyre thereof.

(2) background technology:

Cross-ply is meant that casing ply and each adjacent layer cord of cushion intersect, and is the tire of arranging less than 90 ° of angles with circumferential line, and it mainly is made up of tyre surface, casingply, cushion, inner liner and tyre bead.Tyre surface is the extexine of cover tire, comprises crown, tire shoulder and sidewall three parts.Casingply is the skeleton of cover tire, also claims carcass, is formed with rubber adhesion by multilayer kiss-coating cord usually, and it mainly acts on is bearing load, keeps the shape and size of cover tire, makes cover tire have certain intensity.Tyre bead then is made up of wire loop, cord bound edge and chafer, has very big rigidity and intensity, can make firm being contained on the wheel rim of tire.

Therefore as seen, the casingply of tire plays crucial supporting role in tire.Experiment shows that oblique crossing large tyre is in the ground connection rolling process of bearing load, and skeleton has born the stress more than 90%.Because skeleton is not quite similar at the stress intensity that each segment identifier bears, place, tyre bead rim of the mouth is subjected to stress peak value to occur, and therefore in order to improve the bearing capacity of oblique crossing large tyre, present most oblique crossing large tyre all is to increase the multilayer casingply to realize on carcass.Increasing of casingply number will adopt more wire loop to fix, and therefore place, the tyre bead rim of the mouth of existing giant embryo has generally all designed 3～4 wire loops.When tire building, after each wire loop cord anti-package, between wire loop, can produce bigger subtriangular gap.When giant embryo vulcanized, this place can shelter air or produce starved and the rim of the mouth distortion, thereby influenced the performance and the traffic safety of tire.

(3) summary of the invention:

The present invention discloses the fill method and the oblique crossing large tyre thereof of the tyre wired ring gap of a kind of effective raising tire bead rim of the mouth intensity in order to solve the clearance issues between a plurality of wire loops of oblique crossing large tyre.

The fill method of tyre wired ring gap of the present invention, do not change the production method of existing tire, its difference is, a plurality of wire loops are after the cord anti-package in the tyre bead, and subtriangular gap location adds and posts the gum filler that tamps the gap between the bottom of the adjacent steel wire ring after the anti-package.The introducing of gum filler can be filled and led up the gap that a plurality of wire loops form in the cord turn-up process, air is sheltered and problem such as the starved that causes or even rim of the mouth distortion by this place when preventing to vulcanize.

The gum filler of selecting for use preferably can once tamp the gap between the reverse wrap molding wire loop, so according to the subtriangular gap shape between the reverse wrap molding wire loop, it is leg-of-mutton adhesive tape that described gum filler is selected cross sectional shape for use.After leg-of-mutton adhesive tape and the subtriangular matched in clearance, can effectively reduce the area of leaving a blank therebetween, reduce the complexity of producing, reduce to produce and drop into.For industrial convenience, in the gum filler again with the best that is shaped as of isosceles triangle.

According to the gap length between the oblique crossing large tyre reverse wrap molding wire loop, the size range of described isosceles triangle gum filler is: the base width is between 10 millimeters～20 millimeters, and height is between 8 millimeters～12 millimeters.

The base width of isosceles triangle gum filler is preferably 15 millimeters, highly is preferably 10 millimeters.

In the practical operation, the fill method of tyre wired ring gap, can sketch and be following steps:

Step 1: use extruder commonly used in the tire production will be used to prepare the required shape and size of rubber extrusion of gum filler;

Step 2: in the tire building process, treat that all wire loop cord anti-packages are finished after, every gum filler is filled in the gap between the reverse wrap molding wire loop bottom;

Step 3: behind pressure roller compacting gum filler, again the reverse wrap molding wire loop is just wrapped.

Gum filler of the present invention combines together with carcass behind tyre vulcanization, and just the gap location at cord anti-package wire loop demonstrates the shape of filling glue, guarantees that the shape in the rim of the mouth of producing satisfies designing requirement, thereby has guaranteed the intensity in rim of the mouth.

Described tire can be various types of tires, as long as in the wire loop turn-up process, has formed subtriangular gap between the adjacent steel wire ring bottom after the anti-package and all can adopt the method.Because of having the multilayer casing ply, the tubeless oblique crossing large tyre therefore is fit to use this method more.

Oblique crossing large tyre comprises tyre surface, casingply, cushion, inner liner and tyre bead; A plurality of wire loops through the cord anti-package that tyre bead rim of the mouth place is provided with are formed with subtriangular gap between the adjacent steel wire ring bottom after the anti-package, and difference is: described gap location adds and posts the gum filler that tamps the gap.

In order effectively to reduce the area of leaving a blank in gap, reduce the complexity of producing, reduce to produce and drop into, the cross sectional shape of gum filler for and the reverse wrap molding wire loop between the triangle that matches of subtriangular gap shape, preferred isosceles triangle.

The base width of preferred isosceles triangle gum filler is between 10 millimeters～20 millimeters, and height is between 8 millimeters～12 millimeters.

The preferable width on isosceles triangle gum filler base is 15 millimeters, and the preferred value of height is 10 millimeters.

The fill method of tyre wired ring gap of the present invention and the advantage of oblique crossing large tyre thereof are:

1, on the tire production method of routine, increase gum filler, reduced the gap between the bead wire ring, prevent that this place from sheltering air and the starved that produces and the problem of rim of the mouth distortion, guaranteed the quality of tire;

2, this method is simple, has reduced the complexity of producing;

3, continue to use existing tire equipment, do not increase equipment and produce input.

(4) description of drawings:

Fig. 1 is the partial schematic diagram of a kind of embodiment tire in forming process;

Fig. 2 is the structural representation behind the tire building in the embodiment of Fig. 1.

Description of drawings: 1, tyre surface 2, cushion 3, casingply 4, wire loop 5, gum filler 6, tyre bead 7, inner liner

(5) specific embodiment:

Below in conjunction with accompanying drawing the present invention is described in further details.

As shown in Figure 1, the fill method step in bead wire ring 4 gaps is as follows:

1), preparation gum filler 5, design an isosceles triangle shape of the mouth as one speaks model, at φ 4.5 " the extrusion isosceles triangle gum filler 5 consistent on the extruder with shape of the mouth as one speaks model shape, the bottom width of this isoceles triangle shape gum filler 5 is 15 millimeters, highly is 10 millimeters;

2), in the tire building process, treat that all wire loops 4 reverse wrap moldings are finished after, many gum fillers 5 of step 1) gained are filled into by bar in the subtriangular gap between adjacent steel wire ring 4 bottoms of reverse wrap molding;

3), with wire loop 4 gap locations of pressure roller compacting gum filler 5 in the cord anti-package, make both consolidations of fitting, carry out the just bag of reverse wrap molding wire loop 4 then.

The fetus of above step gained after series of process such as overmolding, sulfuration, is prepared oblique crossing large tyre as shown in Figure 2, comprises tyre surface 1, casingply 3, cushion 2, inner liner 7 and tyre bead 6; Each place, rim of the mouth of tyre bead 6 is provided with four cord anti-package wire loops 4 side by side, be formed with two subtriangular gaps between adjacent steel wire ring 4 bottoms of each reverse wrap molding, respectively add on the circumference of these two subtriangular gap locations and post an isosceles triangle gum filler 5.

The fill method particularly suitable in bead wire ring of the present invention 4 gaps uses in the production of tubeless oblique crossing large tyre.

Claims (10)

1, the fill method of tyre wired ring gap is characterized in that:

A plurality of wire loops (4) are after the cord anti-package in the tyre bead (6), and subtriangular gap location adds and posts the gum filler (5) that tamps the gap between the bottom of the adjacent steel wire ring (4) after the anti-package.

2, the fill method of tyre wired ring gap according to claim 1 is characterized in that:

Described gum filler (5) cross sectional shape is a triangle.

3, the fill method of tyre wired ring gap according to claim 2 is characterized in that:

Described triangle is an isosceles triangle.

4, according to the fill method of any one described tyre wired ring gap in the claim 1～3, it is characterized in that:

Described tire is the tubeless oblique crossing large tyre.

5, the fill method of tyre wired ring gap according to claim 4 is characterized in that:

The base width of described isosceles triangle is between 10 millimeters～20 millimeters, and height is between 8 millimeters～12 millimeters.

6, oblique crossing large tyre, comprise tyre surface (1), casingply (3), cushion (2), inner liner (7) and tyre bead (6), a plurality of wire loops (4) that place, tyre bead (6) rim of the mouth is provided with through the cord anti-package, be formed with subtriangular gap between adjacent steel wire ring (4) bottom after the anti-package,, it is characterized in that:

Described gap location adds and posts the gum filler (5) that tamps the gap.

7, oblique crossing large tyre according to claim 6 is characterized in that:

The cross sectional shape of described gum filler (5) is a triangle.

8, oblique crossing large tyre according to claim 7 is characterized in that:

Described triangle is an isosceles triangle.

9, according to any one described oblique crossing large tyre in the claim 6～8, it is characterized in that:

Described tire is the tubeless oblique crossing large tyre.

10, oblique crossing large tyre according to claim 9 is characterized in that:

The base width of described isosceles triangle is between 10 millimeters～20 millimeters, and height is between 8 millimeters～12 millimeters.

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