Pneumatic tire and mold for the tire
A technology of pneumatic tires and tires, which is applied in the direction of tire tread/tread pattern, tire parts, tires, etc., which can solve the problems of insufficient braking performance and achieve the effect of excellent braking performance
Inactive Publication Date: 2007-01-10
SUMITOMO RUBBER IND LTD
View PDF2 Cites 3 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The braking performance of this tire is insufficient at the beginning of use
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0045] A mold having a rectangular cross-sectional shape and a ridge having a width W2 of 0.4 mm and a height H of 0.5 mm was produced. The radii of curvature Rc and Rd of the ridge are 0.1 mm. figure 1 and figure 2 The shape of the tire obtained using this mold is shown.
Embodiment 2
[0047] A mold was obtained in the same manner as in Example 1, except that the height of the ridges was set at 0.3 mm.
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
| Property | Measurement | Unit |
|---|---|---|
| width | aaaaa | aaaaa |
| depth | aaaaa | aaaaa |
| diameter | aaaaa | aaaaa |
Login to View More
Abstract
A cavity face 34 of a mold 32 has a protruding ridge P. A shape of cross section of the ridge P is almost rectangular. The ridge P has a first corner P 1 , a second corner P 2 , a third corner P 3 and a fourth corner P 4. The ridge P has a height H of 0.1 mm or greater and 1.0 mm or less. The ridge P has a width W 2 of 0.1 mm or greater and 2.0 mm or less. A curvature radius Rc of the second corner P 2 and a curvature radius Rd of the third corner P 3 are equal to or less than 0.2 mm. Included angles beta 1, beta2, beta3 and beta 4 of the ridge P are 80° or greater and 100° or less. A tire which is obtained by the mold 32 has small grooves with a reversed shape of the ridge P.
Description
[0001] This application claims priority based on Japanese Patent Application No. 2005-200694 filed on July 8, 2005, the entire contents of which are hereby incorporated by reference. technical field [0002] The present invention relates to pneumatic tires. More specifically, the present invention relates to improvements in tire treads. Background technique [0003] On snow and ice, studded tires have long been used. In recent years, studless tires are the mainstream. For studless tires, what is important is the braking performance on snow and ice. In order to improve braking performance, tires with glass fibers mixed in the tread have appeared on the market. Fiberglass has a higher hardness than ice. The fiberglass in tires that have fiberglass mixed in the tread grips snow and ice. This grip improves the braking performance of the tire. [0004] In the vulcanization of tires, the tread is held against the cavity surface of the mold. Through this close contact, a sur...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): B60C11/117
CPCB60C2011/1231B60C11/13B60C11/00B29D2030/0612
Inventor 坪野史宽佐川敬道
Owner SUMITOMO RUBBER IND LTD