DE102009026355A1 - Lamellar sheet metal for tire vulcanizing mold in vehicle pneumatic tire, has width of zero point five to five millimeter, and has window with window opening perpendicular to plane of lamellar plate extension - Google Patents

Abstract

The lamellar sheet metal (1) has a width (2) of 0.5 to 5 millimeter, and has a window (3) with a window opening perpendicular to the plane of a lamellar plate extension. The window is filled during the vulcanization of a rubber material of a tire. The window has a window frame (4) with a cutting edge (8) at the radial inner side.

Description

The The invention relates to a lamination plate for a tire vulcanizing mold, wherein the tire vulcanizing mold consists of mold segments whose Form surfaces the tread profile of a to be vulcanized Tire shape, wherein the tread of the tire by grooves Having separate profile elements and wherein by the arranged on a mold segment lamination sheet an incision in the profile element can be imprinted. The invention relates Further, a pneumatic vehicle tire, which a tread pattern having sipes whose sipes with the aforementioned Laminated sheets are stamped.

laminations for Reifenvulkanisierformen and pneumatic vehicle tires with a tread profile having sipes are The skilled worker well known.

Especially in winter tires, it is known and customary, sipes to introduce into the profile elements of the pneumatic vehicle tire. The Fine incisions extend approximately transversely to the tire rolling direction, extend usually in depth almost radially and usually have a width of 0.5 mm to 1 mm. The sipes cause by their edge formation during the operating condition of the tire a good grip of the tire especially on wintry roads. moreover In winter driving conditions, the liability of the tire on the roadway improves by allowing snow into the openings of the Fine incisions is pressed and with the located on the road Snow a snow-snow friction is received.

The problem, however, is that the desired stiffness of the profile elements is reduced by the introduction of fine sipes. A reduced stiffness of the tread elements has a detrimental effect on the adhesion of the tire on dry roads. The DE-A-19506697 therefore proposes a method and a vulcanizing mold with which particularly fine sipes lying below the usual width of the sipes can be produced. It is advantageous here that the rigidity of the profile elements is only slightly reduced, but it is disadvantageous that the very thin sipes can absorb only little snow and the snow-snow friction is reduced.

It is therefore the object of the invention, a lamination plate for a Reifenvulkanisierform and a pneumatic vehicle tire with tread pattern whose sipes, formed by this lamella sheet, a high snow-snow friction allows, but still the stiffness of the profile elements only slightly reduced.

The Invention is with respect to the lamella for the Tire vulcanizing mold in that the lamella sheet has a width from 0.5 mm to 5 mm, that the lamella plate at least a window with a window opening perpendicular to the plane the lamella plate stretching, which during the vulcanization with rubber material of the tire fillable is and that the window of the laminations at its radially inner Window frame has a cutting edge, with the backfilling of the window for demolding the tire from the Vulkanisierform can be severed by a cut.

Executed according to the invention Slat plates of a vulcanizing mold thus enable the formation of a "wide" fine incision in the Tread pattern of the tire to be vulcanized. Thus, in the Driving the tire comparatively much snow in these broad Fine incisions are pressed in and the snow-snow friction and thus the grip of the tire on the winter road is significantly improved.

The opening the window of the lamella sheet flows during the vulcanization of the tire with tread rubber full, such that the vulcanization temperature becomes viscous rubber material of a window firm with rubber of walls of a sipe is connected in the region of the window of the lamellar plate. It's almost like that a web formed inside the opening of the sipe, wherein the web is approximately perpendicular to the extension of the sipe is oriented and on both sides of the sipe walls is fixed. This bridge is during demolding of the tire after the vulcanization process by the cutting edge on Intersected slat plate. A demolding is possible and the original width of the bridge is preserved. The bridge has the function of a spacer between the walls of the fine incision, so that a perfect closing of the fine incision is impossible and the inclusion of Snow is guaranteed in the sipe. Another Function of the bridge is that of the supports of Fine cuts limited profile element sections within of the profile block, creating the desired high rigidity obtained within the profile element.

It is a lamella plate for a tire vulcanizing mold and a pneumatic vehicle tire with tread pattern created whose Fine cuts, formed by this lamella sheet, high snow-snow friction allow, but still the rigidity of the profile elements only slightly lower.

It is advantageous if the width of the lamella plate is 2 mm to 5 mm, particularly advantageous it is liable if this width is 3 mm to 4 mm. Thus, a large volume for the absorption of snow for excellent snow-snow friction is given.

The Slat sheet can have two or more windows. By the arrangement of two or more windows is the rigidity of the profile element controllable.

expedient It is when the window in the lamella is a round or oval Form has. As a result, the rigidity of the profile element controllable.

In a particular embodiment of the lamella is running around the entire window opening around a cutting edge. This embodiment is particularly simple and inexpensive to produce.

The Slat plate can be made in one piece or in the manner of a Sandwiches of several lamellar plates, preferably three Laminated sheet washers, be composed. The lamella plates parallel to the radial direction of the in the Vulkanisierform arranged lamellar sheets. The middle lamella plate of a consisting of three lamella plates existing lamellar plates preferably the cutting edge.

One Pneumatic vehicle tire, which has a sipe, formed with a aforementioned lamellae, characterized, characterized that the sipe is comparatively wide and by a Web, which runs perpendicular to the fine incision plane, is kept open. In addition, by the web an advantageous support the profile element sections formed by the sipes allows, which increases the profile element stiffness desired and advantageous for dry handling.

The The aforementioned invention is in tread patterns of winter tires as well as tread patterns of all-season tires and summer tires used. Especially with summer tires, the stiffness of Profile elements well controllable by the use of the webs.

Further Features, advantages and details of the invention will be apparent from the drawings, the schematic embodiments represent, explained in more detail. It show the

1 a lamellar sheet with two windows;

2 a slat sheet with a window.

In 1 is a lamella plate 1 for a tire vulcanizing mold. Through the lamella plate 1 is by the trapezoidal area shown on the drawing in the lower part 5 a (fine) incision in a profile element of the tread of a tire to be vulcanized einprägbar. The illustrated in the drawing in the upper part oblong, curved area is used for fixed arrangement of the lamellar plate 1 in the vulcanizing mold, e.g. B. by pouring into the Vulkanisierform. The lamella sheet 1 has a width 2 of 3 mm and thus imprints substantially wide sipes in the tire, as it is common by known lamellae. The lamella sheet 1 has in its incision embossing trapezoidal area two circular, identical executed, arranged at a height window 3 whose window openings are oriented perpendicular to the plane of the lamella plate extension. The window 3 point to her window frame 4 circumferentially one cutting edge each 8th on. These windows 3 are filled with rubber during the vulcanization of the tire and form on the vulcanized tire each a bridge between the sipe walls. The webs are oriented approximately perpendicular to the extension of the sipe. These webs are during the demolding of the tire after the vulcanization process by the cutting edge 8th intersected. As a result, a demolding is possible and the width of the webs is retained. The window edges 4 are tapered for better release and widened from the cutting edges 8th to the outer wall surfaces 7 of the lamella sheet 1 , The radial direction is indicated by the arrow.

In 2 is a lamella plate 1 for a tire vulcanizing mold with a window 3 shown. The 2 is different from the one in 1 shown lamellar sheet 1 in that only one window 3 is formed and this has an oval shape.

LIST OF REFERENCE NUMBERS

1

lamination plate

2

width of the lamella sheet

3

window

4

window frame

5

lower Area

6

Oberer Area

7

wall surface

8th

cutting edge

ri

radial Inside

ra

radial Outside

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 19506697 A [0004]

Claims (6)

Slat sheet ( 1 ) for a tire vulcanizing mold, the tire vulcanizing mold consisting of mold segments whose forming surfaces form the tread pattern of a tire to be vulcanized, the tread pattern of the tire having groove elements separated from each other by grooves and wherein 1 ) an incision in the profile element can be embossed, characterized in that the lamella plate ( 1 ) a width ( 2 ) from 0.5 to 5 mm, that the lamellar plate ( 1 ) at least one window ( 3 ) having a window opening perpendicular to the plane of the lamellar sheet extension, which is fillable during vulcanization with rubber material of the tire and that the window ( 3 ) of the laminboard ( 1 ) at its radially inner (ri) window frame ( 4 ) a cutting edge ( 8th ), with which the backfilling of the window for demolding the tire is severed by a cut. Slat plate according to claim 1, characterized in that the width ( 2 ) of the lamellar plate ( 1 ) Is 2 mm to 5 mm, preferably 3 mm to 4 mm. Laminate sheet according to one of the preceding claims, characterized in that this two or more windows ( 3 ) having. Slat plate according to one of the preceding claims, characterized in that the window ( 3 ) has a round or oval shape. Slat plate according to one of the preceding claims, characterized in that around the entire window opening around a cutting edge ( 8th ) is trained. Pneumatic vehicle tire, characterized in that it has a sipe, formed with a lamellar plate ( 1 ) according to at least one of claims 1 to 5.

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