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Tire curing mold

一种轮胎硫化模具、轮胎的技术，应用在胎、家里用具、其他家里用具等方向，能够解决成型不良、空气滞留等问题，达到抑制成型不良的效果

Active Publication Date: 2021-03-16
TOYO TIRE & RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] It is well known that in such a tire vulcanization mold, due to air stagnation between the mold and the green tire, molding defects such as pits (bare, defects) are formed on the outer surface of the tire.
Such poor molding tends to easily occur on the side of the tire including the sidewall portion where the rubber volume is relatively small.

Method used

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  • Tire curing mold
  • Tire curing mold
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Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0032] Hereinafter, a first embodiment will be described with reference to the drawings.

[0033] figure 1 It is a sectional view of the tire vulcanizing mold 10 according to this embodiment. The tire vulcanization mold 10 is a molding mold for vulcanizing and molding an unvulcanized raw tire T arranged with the tire axial direction as the vertical direction by heating and pressurizing, and includes a tread mold 12, a pair of upper and lower tire tires Side molds 14, 15, a pair of upper and lower bead rings 16, 17.

[0034] The tread mold 12 is a mold having a tread molding surface 12 a for molding a tread portion of a tire. The tread mold 12 is composed of a plurality of sectors divided in the tire circumferential direction. The plurality of sectors are provided so as to be capable of scaling and displacing along the radial direction of the tire (tire radial direction). In the mold-closed state in which the segments are arranged at the mold-closing position, the segments ...

no. 2 Embodiment approach

[0067] based on Figure 9 as well as Figure 10 A second embodiment of the present invention will be described. In addition, the same code|symbol is attached|subjected to the same structure as 1st Embodiment mentioned above, and detailed description is abbreviate|omitted.

[0068] In the above-mentioned first embodiment, although the end portions of the first gap 29a and the second gap 29b formed between the sidewall mold main body 21 and the mold block 23 on the sidewall molding surface 15 side are formed so that air can pass through But unvulcanized rubber will not penetrate to this degree of size, but as Figure 9 as well as Figure 10 As shown, the groove 30 having a width larger than that of the first gap 29a may be provided on the sidewall molding surface 15a so as to overlap the first gap 29a. The groove 30 is also called a sawcut or a serration, and is, for example, a fine groove whose cross-sectional shape is a triangular shape that becomes narrower as it goes dow...

no. 3 Embodiment approach

[0073] based on Figure 11 as well as Figure 12 A third embodiment of the present invention will be described. In addition, the same code|symbol is attached|subjected to the same structure as the above-mentioned 1st and 2nd embodiment, and detailed description is abbreviate|omitted.

[0074] In the present embodiment, a plurality of grooves 32 extending parallel to the gap 29 are provided on the sidewall molding surface 15 a near the gap 29 formed between the sidewall mold body 21 and the mold block 23 . The plurality of dimples 32 are provided in parallel to each other on at least a part of the sidewall forming surface 15a to form a linear decorative pattern on the sidewall portion of the tire. In the present embodiment, the plurality of grooves 32 are provided in parallel to the first gap 29 a formed between the radially inner wall surface 25 c of the concave portion 25 and the side wall 23 a of the die block 23 .

[0075] According to the present embodiment, since the g...

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Abstract

To provide a tire vulcanizing mold capable of accurately providing a gap for discharging air existing between a raw tire and a sidewall mold on a sidewall molding surface and suppressing molding failure. A tire vulcanization mold (10) includes a pair of upper and lower sidewall molds (14, 15) having sidewall molding surfaces (14a, 15a) for molding a tire sidewall portion. The sidewall molds (14, 15) include: a sidewall mold body (21), a plurality of mold blocks (23), and a gap (29) formed between the sidewall mold body (21) and the mold blocks (23), The sidewall mold main body (21) is provided with a plurality of recesses (25) at intervals in the tire circumferential direction, and the recesses (25) are closed in the tire circumferential direction and the tire radial direction and open on the sidewall molding surface (15a). , the mold block (23) is embedded in the concave portion (25), and together with the sidewall mold body (21), forms the sidewall molding surface (15a), and the gap (29) is opened on the sidewall molding surface (15a).

Description

technical field [0001] The invention relates to a tire vulcanization mold. Background technique [0002] Tires are produced by producing an unvulcanized green tire and vulcanizing it while molding the green tire into a predetermined shape using a tire vulcanization mold. [0003] As a tire vulcanization mold, the following tire vulcanization mold is known, that is, the tire vulcanization mold includes: a tread mold having a tread molding surface for molding the tread portion of the tire; a pair of upper and lower sidewall molds having a sidewall forming surface for forming a sidewall portion of a tire; and a pair of upper and lower bead rings having a bead forming surface for forming a bead portion of a tire. [0004] It is well known that, in such a tire vulcanization mold, due to air stagnation between the mold and the green tire, molding defects such as pits (defects) are formed on the outer surface of the tire. Such poor molding tends to easily occur on the side surfac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C33/02B29C35/02
CPCB29C33/306B29D30/0606B29D30/0629B29D2030/0618B29D2030/0613B29D2030/0616B29C33/02B29C35/02B29D2030/0617
Inventor 小原将明
Owner TOYO TIRE & RUBBER CO LTD
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