DE102009026293A1 - Vulcanizing mold, for motor vehicle tires, is composed of segments with molding surfaces of part-segments assembled together with ventilation openings - Google Patents

Abstract

The mold, for vulcanizing motor vehicle tires, is composed of a number of mold segments (1) brought together. Each segment has a radial inner molding surface (2) with a negative tread profile to shape a positive profile on the tire. The molding surface has a number of part-segments (3) assembled like a jigsaw, each with a ventilation opening (4) to the ambient atmosphere, as a narrow slit at the segment end zones. The molding surface part-segments are distributed wholly in the peripheral direction. The molding surface has exchangeable part-segments (5) and at least one fixed part-segment (6).

Description

The The invention relates to a vulcanizing mold for vulcanizing vehicle tires, the vulcanization mold being several, one circumferential having closed form zusammenfahrbare mold segments, wherein each mold segment radially inward a molding surface with a Negative tread pattern for forming the positive tread pattern having the vehicle tire to be vulcanized, wherein the molding surface is composed of part-form segments puzzle-like and where the mold surface communicates with the atmosphere standing venting means, wherein the venting means narrow Are column, which at the axially extending edge regions of the partial mold segments are arranged.

The Tire vulcanization takes place in heating presses, in which the green tire used in suitable Vulkanisierformen and under the action of Heat as well as pressure is vulcanized. Vulcanizing molds for Tires consist inter alia of shape segments, which together the radially outer surface of the tire, how to sculpt the tread and shoulder area while further segments form the further regions of the tire. The unvulcanized Green green tire is heat pressed in the vulcanizing mold and by rubber crosslinking reactions in its final rubber-elastic state transferred. It receives the tire its profile and sidewall design by the corresponding Negative design of the molding surfaces of the mold segments.

Important is at the tire vulcanization that when moving together the mold segments the trapped air within the mold segments does not compromise the build quality affected by vehicle tires.

The Mold segments of Vulkanisierformen for vehicle tires are made of metal, usually of steel or aluminum.

A generic Vulkanisierform is from the DE 602 14 785 T2 known. The molding surfaces of the mold segments of this vulcanizing mold are puzzle-like composed of partial mold segments in axial pitch, wherein at the axial edges of the mold segments venting means in the form of narrow columns which communicate with the atmosphere, are arranged. The puzzle-like partial mold segments are interchangeably arranged in the mold segments. The disadvantage, however, is that the puzzle-like partial mold segments have an axial pitch. As a result, circumferential misalignments of the vulcanized tire, which are disadvantageous for the performance, in particular the uniformity and also the noise development of the tire, can occur in the case of an incorrect arrangement and alignment of the partial mold segments in the radial direction. It is also disadvantageous that rib-like, axially extending exhausts on the tire, which are disadvantageous in the new state of the tire due to their axial course for wet braking, occur on the gaps serving for the venting.

Of the Invention is therefore based on the object, a cost-effective Vulkanisierform to create, are pressed with the tire that can perform well, even when new Tire, exhibit and the excellent manufacturing quality exhibit.

Solved The object is according to the preamble and the Characteristic feature of claim 1, characterized in that the partial shape segments of the mold segment a division exclusively in the circumferential direction exhibit.

The Division of the partial shape segments thus takes place in the circumferential direction and runs - compared to the division in the state of Technique - by 90 ° in the plane of the molding surface turned. Many advantages are achieved with the invention. One Advantage is the fact that the production quality the tire is very high. Due to the circumferential division of the partial molding surfaces The ventilation serving columns run at the edges the part-shaped surfaces also in the circumferential direction. Thus, the sum of the gap lengths is increased, thereby the ventilation is improved. It can be more air volume be removed per unit of time and air bubbles, which would reduce the manufacturing quality of the tire, are reliably avoided. Another advantage of the invention is to be seen in that the serving at the vent Columns occurring rib-like shoots in the circumferential direction run. Circumferential rib-like shoots are not critical for the wet braking behavior of the new tire. Another advantage of the invention is the fact that when not exact arrangement and alignment of the part-form segments in the radial Direction no circumferential rashes as in State of the art occur, but extending in the axial direction Height blows. These are for the performance of the tire uncritical.

It is advantageous if the mold surface of the mold segment has at least one peripheral web, which is designed in the manner of a partial mold segment, but not interchangeable, but is fixedly arranged in the mold segment. Such a partial molding segment is referred to as a "solid partial molding segment". By this fixed part-shaped segment a fixation of the exchangeable part-mold segments is made possible, whereby the manufacturing quality of the tire to be vulcanized is increased. Thus, the molding surface of the molding mentes exchangeable part-form segments and at least one fixed part-form segment on. In addition, tolerances are equalized and optimum gap width are achieved.

expedient It is when two to eight fixed part-mold segments in the mold surface are arranged. This is the interchangeable part-form segments to fix very well.

The Fixation is further enhanced when each has a fixed part-mold segment immediately adjacent to a replaceable part-mold segment is arranged. In addition, the overall tolerances become even distributed.

Advantageous it is when the partial mold segments in the shoulder area a smaller Have width than in the central area. This is an improved Ventilation in the shoulder area critical for ventilation allows.

expedient it is when three to twenty partial mold segments, preferably six to fourteen partial mold segments, the mold surface of a mold segment form.

Advantageous it is when a part-mold segment circumferentially revolving Negative profile element or circumferential in the circumferential direction negative groove is. This makes it possible, a replaceable part-shaped segment in case of damage or for another profile design replace, without the entire mold segment costly and time consuming needs to be renewed.

In an advantageous embodiment of the invention is provided as additional venting means vent grooves to arrange in the mold surface. air pockets inside the mold segments may be in the vent grooves be collected, so that the manufacturing quality of the tire is high. If the ventilation grooves in the columns of the first deaerating agent, the collected air can be led to the columns and removed there.

In a further advantageous embodiment of the invention is provided that the vent grooves in a regular Structure are arranged. Such a regular Structure of the ventilation grooves can be opened a simple way in the mold segments of the vulcanization mold contribute.

In a further advantageous embodiment of the invention is provided that the vent grooves in a substantially diamond-shaped Structure are arranged. Due to the diamond-shaped structure leaves create a tight mesh of vent grooves.

In a further advantageous embodiment of the invention is provided that the vent grooves in a substantially checkerboard-like structure are arranged. A checkered structure is easy in the mold segments can be introduced.

In a further advantageous embodiment of the invention is provided that the arrangement of the vent grooves in the mold segments is asymmetric. In this way, the venting system can be to optimize in a simple way. In some areas of the tire profile For example, a more intensive ventilation is necessary than to other parts of the profile.

Advantageous it is when as an additional venting agent Bleed valves are arranged. This is in particular advantageous in those areas of the molding surface, in which are not optimally ventilated by the first venting means, the column, or additionally by vent grooves, can be achieved. This can, for example, in the shoulder area the profile or special profile training such as be an attrition indicator.

By Combination of ventilation gaps, ventilation grooves and / or vent valves is an optimal venting system reached. Air pockets in the mold segments are on This way first in the venting columns dissipated. In addition, air pockets collected in vent grooves and then targeted to the Venting gaps led where subsequently the air is discharged through appropriate channels can be. Another advantage is then that in this Bleeding system only a very small number of bleeder valves necessary in critical areas.

"festival Part-shaped segment "means a fixedly arranged in the mold segment Shape segment.

"Interchangeable Part Shape Segment "means one interchangeable in the mold segment arranged part-shape segment.

"Part Shape Segment" means both a solid part mold segment and a replaceable part mold segment.

Further Advantages, features and details of the invention are shown in the figures, which embodiments illustrate, closer explained. It show the:

1 a radial section through a mold segment which embosses the tread;

2 a view of an assembled form segment.

The 1 shows a radial section through a mold segment 1 a vulcanization mold for vulcanizing vehicle tires. The vulcanizing mold (not shown) has a plurality of mold segments which can be brought together in a circumferentially closed mold 1 on, with each mold segment 1 radially inside (ri) a forming surface 2 having a negative tread pattern for forming the positive tread pattern of the vehicle tire to be vulcanized. The mold surface 2 is made up of part-shape segments 3 puzzle-like and has a venting means associated with the atmosphere 4 on. The deaerator 4 are narrow gaps, which are at the circumferentially considered edge regions of the partial mold segments 3 arranged and communicate with the atmosphere. The part-shape segments 3 of the mold segment 1 have a division exclusively in the circumferential direction (in the leaf level) on.

The mold surface 2 of the mold segment 1 is made up of thirteen part-shape segments 3 pieced together. This forms a part-shape segment 2 a circumferentially circumferential profile element or a peripheral circumferential groove of the vehicle tire. The part-shape segment 3 extends integrally over the entire circumferentially extending length of a mold segment 1 , In the middle of the molding surface 2 are three solid part-shape segments 6 arranged, the remaining part-form segments are exchangeable part-form segments 5 , The shape segment 1 has a plate on the edge surface against which the mold segments abut one another when the vulcanization mold has collapsed 7 on.

The 2 shows a view of an assembled form segment 1 , The mold segment is very similar to the mold segment of 1 built up. Therefore, for the 2 on the description of 1 directed. Only the profile design is different. All partial mold segments are not yet arranged in the mold. So far, only the fixed part-shape segments 6 arranged in the mold segment. Therefore, it is very good to see that the part-shape segments 3 run in the circumferential direction and integrally over the entire circumferential length of the mold segment 1 extend. The replaceable part-mold segments are in clearances 8th arranged. In the assembled state of the mold segment 1 each is a fixed part-mold segment 6 arranged directly to a replaceable part-shaped segment.

LIST OF REFERENCE NUMBERS

1

mold segment

2

form surface

3

Shape Segment

4

Vent means / gap

5

interchangeable Shape Segment

6

feast Shape Segment

7

sheet

8th

suitor room

ri

radial Inside

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 60214785 T2 [0005]

Claims (12)

A vulcanizing mold for vulcanizing vehicle tires, wherein the vulcanizing mold has a plurality of mold segments which can be brought together in a circumferentially closed mold ( 1 ), each mold segment ( 1 ) radially inside (ri) a molding surface ( 2 ) having a negative tread profile for forming the positive tread pattern of the vehicle tire to be vulcanized, the forming surface ( 2 ) from part-shape segments ( 3 ) is composed of a puzzle-like manner and an atmosphere-related deaerating agent ( 4 ), wherein the venting means ( 4 ) are narrow gaps at the edge regions of the partial mold segments ( 3 ), characterized in that the part-mold segments ( 3 ) of the mold segment ( 1 ) have a division exclusively in the circumferential direction. Vulkanisierform according to claim 1, characterized in that the molding surface ( 2 ) of the mold segment ( 1 ) of exchangeable part-mold segments ( 5 ) and at least one fixed part-mold segment ( 6 ) consists. Vulkanisierform according to claim 2, characterized in that two to eight fixed part-molding segments ( 6 ) in the molding surface ( 2 ) are arranged. Vulkanisierform according to claim 2 or 3, characterized in that in each case a solid part-shaped segment ( 6 ) immediately adjacent to a replaceable part-mold segment ( 5 ) is arranged. Vulcanization mold according to one of the preceding claims, characterized in that the partial mold segments ( 3 ) in the shoulder region have a smaller width than in the central region. Vulcanizing mold according to one of the preceding claims, characterized in that three to twenty exchangeable partial mold segments ( 5 ), preferably six to fourteen exchangeable partial mold segments ( 5 ) in the molding surface ( 2 ) of a mold segment ( 1 ) are arranged. Vulkanisierform according to claim 1 or 2, characterized in that a part-shaped segment ( 3 ) is a circumferential circumferential negative profile element or a peripheral circumferential groove in the circumferential direction. Vulcanizing mold according to one of the preceding claims, characterized in that the part-molding segment ( 3 ) over the entire circumferentially extending length of a mold segment ( 1 ). Vulkanisierform according to any one of the preceding claims, characterized in that as an additional venting means vent grooves in the molding surface ( 2 ) are arranged, which preferably have a regular structure. Vulcanizing mold according to claim 9, characterized that the vent grooves in a substantially diamond-shaped or checkerboard-like structure are arranged. Vulcanizing mold according to one of the preceding claims, characterized in that as an additional venting agent Bleed valves are arranged. Vehicle tire, characterized in that he with a vulcanizing mold according to one or more of claims 1-11 has been vulcanized.

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