CN216467186U

CN216467186U - Radial tire with side wall provided with knurled structure

Info

Publication number: CN216467186U
Application number: CN202123427636.9U
Authority: CN
Inventors: 姜家润
Original assignee: Sichuan Yuanxing Rubber Co Ltd
Current assignee: Sichuan Yuanxing Rubber Co Ltd
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-05-10
Anticipated expiration: 2031-12-31

Abstract

The utility model discloses a radial tire with a knurled side wall, wherein the side wall is provided with two exhaust lines, each exhaust line is a whole circumferential line, and each exhaust line and the tire are concentric circles; a plurality of knurling lines are arranged between the two exhaust lines, each knurling line is perpendicular to the exhaust lines and points to the center of the tire, all the knurling lines are uniformly arranged between the two exhaust lines in a circumferential manner, and an exhaust groove is formed between every two adjacent knurling lines; the distance between the two exhaust lines is 19-21 mm; two ends of the thread rolling line are connected with the two exhaust lines; and the tire segmented mold in contact with the knurled line is provided with an exhaust hole, and the exhaust hole is communicated with the groove of the tire segmented mold. The utility model provides a produce fracture and local unevenness and lead to the tire finished product to appear a large amount of defective products, increase the problem that the subsequent handling degree of difficulty was handled because of tread rubber tail end and sidewall rubber tail end junction, reduced manufacturing cost effectively.

Description

Radial tire with side wall provided with knurled structure

Technical Field

The utility model relates to a decorative pattern structure of tire, more specifically, the utility model relates to a side wall has meridian tire of annular knurl structure.

Background

The outer surface of the tire consists of a tread and a sidewall, wherein the tread is a part of the tire which is directly contacted with the road surface, the sidewall is a part of the sidewall of the tire, the tread mainly consists of tread rubber, and the sidewall mainly consists of sidewall rubber.

As shown in fig. 1, in the tire forming process, the tail end of the tread rubber 1 contacts the tail end of the sidewall rubber 2, the tail end of the tread rubber is pressed on the tail end of the sidewall rubber, the tail end of the tread rubber is thick when being pressed out and deviates from the standard, the problem that the step is too large can occur at the joint 3 of the tail end of the tread rubber and the sidewall rubber, in the subsequent vulcanization process, a large gap can occur at the joint of a mold and the joint, more air remains at the gap, and the phenomenon that the joint of the tail end of the tread rubber and the sidewall rubber is easy to crack and locally uneven can occur due to the difficulty in exhausting at the gap, so that a large amount of defective products can occur on the tire finished product, the difficulty in processing in the subsequent process is increased, and the manufacturing cost is increased. There is a need to devise a solution to the joint venting problem.

SUMMERY OF THE UTILITY MODEL

The utility model overcomes prior art's is not enough, provides a radial tire's embodiment that side wall has a annular knurl structure to can expect to solve the problem that the difficult position tread rubber that leads to of exhausting in the tire shaping process and the easy fracture of the gluey combination department of sidewall or the local phenomenon of injustice appears.

In order to solve the technical problem, the utility model adopts the following technical scheme:

a radial tire with a knurled sidewall is characterized in that two exhaust lines are arranged on the sidewall, each exhaust line is a whole circumferential line, and each exhaust line and the tire are concentric circles; a plurality of knurling lines are arranged between the two exhaust lines, each knurling line is perpendicular to the exhaust lines and points to the center of the tire, all the knurling lines are uniformly arranged between the two exhaust lines in a circumferential manner, and an exhaust groove is formed between every two adjacent knurling lines; the distance between the two exhaust lines is 19-21 mm; two ends of the thread rolling line are connected with the two exhaust lines; and an exhaust hole is formed in the tire segmented mold in contact with the knurled line and is communicated with a groove in the tire segmented mold for forming the exhaust line and the knurled line.

The two exhaust lines are respectively an exhaust line at the outer side of the knurled line and an exhaust line at the inner side of the knurled line, and the distance between the exhaust line at the outer side of the knurled line and the top point of the tire crown is greater than or equal to 30 mm.

Since both ends of the thread rolling line are in contact with the two exhaust lines, the length of the thread rolling line is equal to the interval between the two exhaust lines, that is, the length of the thread rolling line can be designed to be 19-21 mm.

The radial tire uses a tire segmented mold in the forming process, the tire segmented mold consists of segmented mold side plates and pattern blocks, the combination surface of the segmented mold side plates and the pattern blocks is called as a mold parting surface, the pattern blocks are provided with patterns, the pattern structures of tire crown and tire shoulder parts are formed in the tire forming process, and the segmented mold side plates are used for realizing the forming of the tire side shape in the tire forming process.

The thread rolling wire takes one end pointing to the center of the tire as the inner end and the other end as the outer end; the distance between the outer end of the thread rolling line and the parting surface of the side plate and the pattern block of the tire segmented mold is 3-7 mm, and preferably 5 mm. The distance between the outer end of the thread rolling line and the parting surface of the side plate and the pattern block of the tire segmental mold is a vertical distance.

The height of the exhaust line on the inner side of the thread rolling line is 0.4-0.6 mm, and preferably 0.5 mm; the width of the exhaust line on the inner side of the thread rolling line is 0.9-1.1 mm, and preferably 1 mm.

The height and the width of the air discharge line on the outer side of the knurled line can be equal to or larger than the height and the width of the air discharge line on the inner side of the knurled line.

The height of the thread rolling line is 0.2-0.4 mm, and preferably 0.3 mm; the cross section of the thread rolling line is trapezoidal, and the width of the outer end face of the thread rolling line is 0.3-0.5 mm, preferably 0.4 mm. And calculating the interval between the thread rolling lines according to the distance between the central lines of the adjacent thread rolling lines, wherein the interval between the adjacent thread rolling lines is 0.8-1.2 mm, and preferably 1 mm.

Compared with the prior art, the utility model discloses following beneficial effect has at least:

1. the problems that a large number of defective products are produced on a finished tire product and the subsequent process treatment difficulty is increased due to the fact that the joint of the tail end of the tread rubber and the tail end of the sidewall rubber is cracked and locally uneven are solved, and the manufacturing cost is effectively reduced.

2. If only use the exhaust hole can only local exhaust, the exhaust problem can't be solved in whole circle, adopt the technical scheme of the utility model set up a small amount of exhaust holes on the mould and can solve the exhaust problem in whole circle, the design of annular knurl makes the side wall handsome in appearance smooth and easy moreover.

3. In the subsequent dynamic and static balance measuring process, the whole circle of patterns of the knurled line circumference of the tire are the same, and the structure can be used as a laser dotting reference, so that the measuring accuracy is further improved.

Drawings

FIG. 1 is a schematic view of the application of a tread rubber and a sidewall rubber of a formed green tire;

FIG. 2 is a schematic view of the vulcanization of a tire in a mold;

FIG. 3 is a partial cross-sectional view of a tire being cured in a mold;

FIG. 4 is an overall view of the tire sidewall vent line and knurl line;

FIG. 5 is a cross-sectional view of a knurled line of a tire sidewall;

FIG. 6 is a cross-sectional view of a tire sidewall vent line;

the reference numbers in the above figures represent the following part or structure names: 1-tread rubber, 2-sidewall rubber, 3-joint of the tail end of the tread rubber and the sidewall rubber, 4-mold shell, 5-mold cavity, 6-tire, 7-vulcanized air bag, 8-segmented mold side plate, 9-pattern block, 10-mold parting surface, 11-joint gap, 12-exhaust hole, 13-exhaust line, 14-rolling line, 15-exhaust groove and 16-tire crown.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

As shown in fig. 2, a mold cavity 5 is formed in the mold shell 4, and a tire 6 is vulcanized and molded in the mold cavity 5 by cooperation of a vulcanization bladder 7. In the vulcanization molding process, the tread rubber and the sidewall rubber can contact with the vulcanization air bag and the mold, form the shape of the tire under the combined action of the mold and the vulcanization air bag, and are vulcanized and shaped.

Radial tires use molds in the molding process, which are commonly referred to as tire segmented molds. As shown in fig. 3, the tire segmented mold is composed of segmented mold side plates 8 and pattern blocks 9, the combination surfaces of the segmented mold side plates and the pattern blocks are called mold parting surfaces 10, the pattern blocks are provided with patterns, in the tire molding process, pattern structures of tire crown and tire shoulder parts are formed, and the segmented mold side plates are used for realizing the molding of the tire side wall shape in the tire molding process. The vulcanization air bag 7 is arranged on the inner side of the tire, the vulcanization air bag swells after being inflated, a cavity capable of being provided with a hub is formed on the inner side of the tire, and after vulcanization is completed, the vulcanization air bag is deflated and separated from the tire. The junction of tread rubber, sidewall rubber forms joint gap 11, the utility model discloses open exhaust hole 12 on the segmented mold curb plate of tire segmented mold, this exhaust hole can be with the gas outgoing in joint gap.

Only open exhaust hole 12 on tire loose mould and can not realize the exhaust in combination department gap 11 betterly, consequently the utility model discloses side wall structure to the radial tire designs, provides a side wall and has the radial tire of annular knurl structure, and open exhaust hole 12 with tire loose mould and cooperate, reach good exhaust effect. Specifically, as shown in fig. 4, the sidewall of the radial tire is provided with two air discharge lines 13, each air discharge line is a whole circumferential line (at least one air discharge line protrudes out of the tire surface), and each air discharge line and the tire are concentric circles, so that when viewed from the side of the tire, the two air discharge lines are an inner circle and an outer circle, which have different diameters but the same center, and have a certain distance therebetween for providing the pattern structure. A plurality of knurling lines 14 are arranged between the two exhaust lines, the distance between the two exhaust lines is limited by the distance, the length of each knurling line is short, each knurling line is perpendicular to the exhaust lines, each knurling line points to the center of a circle of the tire, all the knurling lines are uniformly arranged in a circumferential mode between the two exhaust lines to form a knurling line circumference, an exhaust groove 15 is formed between every two adjacent knurling lines, and the exhaust grooves facilitate gas exhaust. According to an embodiment of the utility model, the interval between two exhaust lines is 19 ~ 21mm, because roll the both ends of line and two exhaust lines meet, consequently roll the length of line and equal the interval between two exhaust lines, roll the length of line and can design 19 ~ 21mm promptly. According to the utility model discloses an embodiment, the interval between two exhaust lines is 20mm, and the length of each roll flexible line is 20 mm. Two ends of the thread rolling line are connected with two exhaust lines. Because the exhaust holes are formed in the tire segmented mold in contact with the knurled lines, penetrate through the tire segmented mold, can exhaust air from the inside of the mold to the outside of the mold, and are communicated with the grooves in the tire segmented mold for forming the exhaust lines, the air in the gap 11 at the joint can be exhausted from the outside of the tire segmented mold through the exhaust grooves, the exhaust holes, the grooves in the tire segmented mold for forming the exhaust lines and the grooves in the tire segmented mold for forming the knurled lines.

As shown in fig. 4, two exhaust lines are respectively in the inside and outside both sides of knurl line circumference, and the exhaust line in the outside of knurl line circumference is called knurl line outside exhaust line, and the exhaust line in the inboard of knurl line circumference is called knurl line inboard exhaust line, and wherein, knurl line outside exhaust line is greater than or equal to 30mm with the crown summit apart from, according to the utility model discloses an embodiment, knurl line outside exhaust line is 30mm with the distance on crown summit.

For convenience of describing the position relation between the knurling line and the parting surfaces of the side plates and the pattern blocks of the tire segmented mold, one end of the knurling line, which points to the center of the tire, is taken as the inner end of the knurling line, and the other end of the knurling line is taken as the outer end of the knurling line; the distance of the outer end of the line of rolling and the die joint 10 (fig. 3) of tire segmented mold curb plate and decorative pattern piece is 3 ~ 7mm, according to the utility model discloses an embodiment, the distance of the outer end of the line of rolling and the die joint of tire segmented mold curb plate and decorative pattern piece is 5 mm. The distance between the outer end of the thread rolling line and the parting surface of the side plate and the pattern block of the tire segmental mold is a vertical distance.

According to one embodiment of the utility model, the height of the air discharge line inside the knurl line is 0.4-0.6 mm, and the width of the air discharge line inside the knurl line is 0.9-1.1 mm; according to the utility model discloses an embodiment, the height of the inboard air discharge line of annular knurl line is 0.5mm, and the width of the inboard air discharge line of annular knurl line is 1 mm.

The above-mentioned content shows that the inboard air discharge line of knurling line has certain requirement to height and width, but the utility model discloses the requirement to the outside air discharge line of knurling line is lower for the inboard air discharge line of knurling line, and its design is more nimble, and the height and the width of the outside air discharge line of knurling line can equal with the inboard air discharge line of knurling line promptly, also can be greater than or be less than the height and/or the width of the inboard air discharge line of knurling line.

Similarly, the utility model also provides reference data of knurling line design, for example according to an embodiment of the utility model, the height of the knurling line is 0.2-0.4 mm, the cross section of the knurling line is trapezoidal, the width of the outer end surface is 0.3-0.5 mm, the interval between the knurling lines is calculated by the distance between the central lines of adjacent knurling lines, and then the interval between adjacent knurling lines is 0.8-1.2 mm; according to an embodiment of the invention, the height of the thread rolling line is 0.3 mm; the width of the outer end face of the trapezoidal cross section of the thread rolling line is 0.4 mm; the spacing between adjacent stitching threads was 1 mm.

L1, L2, L3, K1, K2, K3, H1 and H2 are also marked on fig. 4, 5 and 6, wherein K1 is the distance between the tire crown 16 and the mold parting surface, the knurl line is below the mold parting surface, the distance between the outer end of the knurl line and the mold parting surface is K2, and the length of the knurl line is K3; the exhaust line height is H1, and the exhaust line width is L1; the sinking depth between the thread rolling lines is H2, and specific values are set according to requirements; the width of the outer end face of the trapezoidal cross section of the knurl line was L2, the spacing between the knurl lines was calculated as the distance between the center lines of adjacent knurl lines, and the knurl line spacing was L3.

Although the invention has been described herein with reference to the illustrated embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the scope and spirit of the principles of this disclosure. More specifically, various variations and modifications may be made to the component parts and/or arrangements of the subject combination arrangement within the scope of the disclosure herein. In addition to variations and modifications in the component parts and/or arrangements, other uses will also be apparent to those skilled in the art.

Claims

1. A radial tire with a knurled structure on a sidewall is characterized in that two exhaust lines are arranged on the sidewall, each exhaust line is a whole circumferential line, and each exhaust line and the tire are concentric circles; a plurality of knurling lines are arranged between the two exhaust lines, each knurling line is perpendicular to the exhaust lines and points to the center of the tire, all the knurling lines are uniformly arranged between the two exhaust lines in a circumferential manner, and an exhaust groove is formed between every two adjacent knurling lines; the distance between the two exhaust lines is 19-21 mm; two ends of the thread rolling line are connected with the two exhaust lines; and an exhaust hole is formed in the tire segmented mold in contact with the knurled line and is communicated with a groove in the tire segmented mold for forming the exhaust line and the knurled line.

2. The radial tire with a knurled side wall according to claim 1, wherein the two vent lines are respectively a vent line on the outer side of the knurled line and a vent line on the inner side of the knurled line, and the distance between the vent line on the outer side of the knurled line and the vertex of the crown is greater than or equal to 30 mm.

3. The radial tire with the sidewall provided with a knurled structure according to claim 1, wherein the length of the knurl thread is 19-21 mm.

4. The radial tire with the sidewall provided with the knurled structure according to claim 1, wherein the distance between the outer end of the knurl line and the parting surface of the side plate and the block of the tire segment mold is 3-7 mm.

5. The radial tire with a knurled side wall according to claim 2, wherein the height of the air vent line on the inner side of the knurl line is 0.4-0.6 mm, and the width of the air vent line on the inner side of the knurl line is 0.9-1.1 mm.

6. The radial tire with a knurled sidewall of claim 2, wherein the vent line on the outer side of the knurl line has a height equal to the vent line on the inner side of the knurl line, and the vent line on the outer side of the knurl line has a width equal to the vent line on the inner side of the knurl line.

7. The radial tire having a sidewall with a knurled structure according to claim 2, wherein the vent line on the outer side of the knurl line has a height greater than the vent line on the inner side of the knurl line, and the vent line on the outer side of the knurl line has a width greater than the vent line on the inner side of the knurl line.

8. The radial tire with a knurled side wall according to claim 1, wherein the knurl thread has a height of 0.2-0.4 mm; the cross section of the thread rolling line is trapezoidal, and the width of the outer end face of the thread rolling line is 0.3-0.5 mm.

9. The radial tire with a knurled side wall according to claim 1, wherein the distance between adjacent knurl lines is calculated as the distance between the center lines of the adjacent knurl lines, and the distance between the adjacent knurl lines is 0.8-1.2 mm.