KR101741081B1 - Mold for forming tread sipes and tread - Google Patents

Mold for forming tread sipes and tread Download PDF

Info

Publication number
KR101741081B1
KR101741081B1 KR1020150122333A KR20150122333A KR101741081B1 KR 101741081 B1 KR101741081 B1 KR 101741081B1 KR 1020150122333 A KR1020150122333 A KR 1020150122333A KR 20150122333 A KR20150122333 A KR 20150122333A KR 101741081 B1 KR101741081 B1 KR 101741081B1
Authority
KR
South Korea
Prior art keywords
convex portion
concave portion
concave
convex
mold
Prior art date
Application number
KR1020150122333A
Other languages
Korean (ko)
Other versions
KR20170025616A (en
Inventor
탁인용
Original Assignee
금호타이어 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 금호타이어 주식회사 filed Critical 금호타이어 주식회사
Priority to KR1020150122333A priority Critical patent/KR101741081B1/en
Publication of KR20170025616A publication Critical patent/KR20170025616A/en
Application granted granted Critical
Publication of KR101741081B1 publication Critical patent/KR101741081B1/en

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D30/00—Producing pneumatic or solid tyres or parts thereof
    • B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
    • B29D30/0601—Vulcanising tyres; Vulcanising presses for tyres
    • B29D30/0606—Vulcanising moulds not integral with vulcanising presses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03—Tread patterns
    • B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
    • B60C11/1204—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special shape of the sipe
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03—Tread patterns
    • B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
    • B60C11/1204—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special shape of the sipe
    • B60C11/1222—Twisted or warped shape in the sipe plane
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D30/00—Producing pneumatic or solid tyres or parts thereof
    • B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
    • B29D30/0601—Vulcanising tyres; Vulcanising presses for tyres
    • B29D30/0606—Vulcanising moulds not integral with vulcanising presses
    • B29D2030/0607—Constructional features of the moulds
    • B29D2030/0613—Means, e.g. sipes or blade-like elements, for forming narrow recesses in the tyres, e.g. cuts or incisions for winter tyres

Abstract

The present invention relates to a mold for tire siding and a tire tread, in particular, a bending portion formed by alternately forming a convex portion and a concave portion on the entire surface of the mold body, wherein the convex portion and the concave portion are elongated to the left and right, Wherein at least one of the convex portion and the concave portion has a circular arc shape in vertical cross section and a connecting surface connecting the concave portion and the convex portion is formed to be inclined so that the torsional rigidity Which can improve the handling performance of a vehicle, and a tire tread for tire molding.

Description

[0001] MOLD FOR FORMING TREAD SIPES AND TREAD [0002]

The present invention relates to a mold for tire siding and a tire tread, in particular, a bending portion formed by alternately forming a convex portion and a concave portion on the entire surface of the mold body, wherein the convex portion and the concave portion are elongated to the left and right, Wherein at least one of the convex portion and the concave portion has an arc shape in vertical section and a connecting surface connecting the concave portion and the convex portion is formed to be inclined, And tire treads.

In the conventional tire, a tread pattern having a certain shape is formed on the tread rubber layer contacting with the road surface during traveling.

The tread pattern comprises longitudinal grooves formed along the circumferential direction of the tire, transverse grooves formed along the width direction of the tire intersecting the longitudinal grooves, and tread blocks 30 defined by longitudinal grooves and transverse grooves.

The longitudinal grooves include a first longitudinal groove 11 and a second longitudinal groove 12 formed along the circumferential direction at the central portion in the width direction of the tire and a third longitudinal groove 13 formed outside the first longitudinal groove 11 And a fourth kind groove 14 formed outside the second kind groove 12 and the third kind groove 13 and the fourth kind groove 14 each comprise a block which is divided by a lateral groove, In a circumferential direction of the tire so as to recompose the tire.

The lateral grooves 21 and the right lateral grooves 22 are formed in the left and right sides of the vertical center line of the tire and the left lateral grooves 21 and the right lateral grooves 22 are formed in the circumferential direction of the tire And are formed in an arc shape inclined in the width direction of the tire.

The tread blocks 30 defined by the longitudinal grooves and the lateral grooves are formed with a plurality of sipes 35 in parallel with each other in one direction.

However, the conventional tire has a problem that the torsional rigidity is deteriorated due to the formation of the sipes.

Korean Patent Registration No. 10-0913597

SUMMARY OF THE INVENTION It is an object of the present invention to provide a mold for tire sifting and a tire tread capable of improving the torsional rigidity of the tire.

According to an aspect of the present invention, there is provided a mold for tire sifting, comprising: a plate-shaped metal mold body; and a bend portion formed by alternately forming a convex portion and a concave portion on the entire surface of the metal mold body, At least one of the convex portion and the concave portion has a circular arc shape in a vertical cross section and the connecting surface connecting the concave portion and the convex portion is formed in a shape of a circular arc, And is formed to be inclined.

A center angle of the convex portion and the concave portion having an arc-shaped vertical cross section may be smaller than 180 degrees.

The convex portion is disposed on the left side or the right side of the concave portion, and at least two bent portions are formed, and the two bent portions may be arranged along the vertical direction.

The convex portion on the upper side and the convex portion on the lower side are staggered from each other, and the length of the concave portion at the upper portion and the concave portion at the lower portion may be different.

The rear surface of the mold body may have a rear concave portion formed at a portion where the convex portion is formed, and a rear convex portion formed at a portion where the concave portion is formed.

According to another aspect of the present invention, there is provided a tire tread including a tread body, a sipe formed on the tread body, a sieve having a first sipe surface formed on the tread body, Wherein at least one of the first siphon and the second siphon is formed by alternately forming a convex portion and a concave portion, wherein the convex portion and the concave portion are elongated in the left and right direction, At least one of the convex portion and the concave portion is formed in an arc shape in a vertical section and a connecting surface connecting the concave portion and the convex portion is formed to be inclined .

According to the tire mold for tire sifting and the tire tread of the present invention as described above, the following effects can be obtained.

Wherein the convex portion and the concave portion are elongated in the left and right direction and the length of the concave portion and the convex portion are formed differently from each other, The connecting surface connecting the recess and the convex portion is inclined so that the longitudinal rigidity can be maintained and at the same time the torsional rigidity of the tire can be improved and the vehicle handling performance can be further improved have.

1 is a side view of a conventional tire.
2 is a perspective view of a mold for tire sidewall molding according to a preferred embodiment of the present invention.
3 is a front view of a mold for tire sidewall molding according to a preferred embodiment of the present invention.
4 is a horizontal sectional view of a mold for tire sip molding according to a preferred embodiment of the present invention.
5 is a vertical sectional view of a mold for tire sip molding according to a preferred embodiment of the present invention.
6 is a rear view of a mold for tire sifp molding according to a preferred embodiment of the present invention.
FIG. 7 is a perspective view of a portion of a tire tread according to a preferred embodiment of the present invention; FIG.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

For reference, the same components as those of the conventional art will be described with reference to the above-described prior art, and a detailed description thereof will be omitted.

2 to 6, the mold for tire sifting according to the present embodiment includes a plate-shaped metal mold body 100, and a convex portion 110 and a concave portion 120 The convex portion 110 and the concave portion 120 are elongated in the left and right direction and the length of the concave portion 120 and the convex portion 110 are different from each other And at least one of the convex portion 110 and the concave portion 120 has an arc shape in a vertical section and a connecting surface 103 connecting the concave portion 120 and the convex portion 110 And is formed to be inclined.

The mold body 100 is formed in a plate shape. The mold body 100 is formed to be symmetrical to the left and right.

The mold body 100 is formed in a rectangular plate shape having larger left and right lengths than upper and lower heights, and protruding pieces 101 protruding leftward or rightward are formed on both sides of the mold body 100.

The projecting piece 101 is formed continuously on the upper surface of the flat portion 102, which will be described below.

The corner of the portion connecting the lower portion of the projecting piece 101 and the side of the mold body 100 is rounded.

A flat portion 102 is formed at the upper end of the mold body 100.

The bending part 130 is formed on the entire surface of the mold body 100 in which the convex part 110 and the concave part 120 are alternately formed. The bent portion 130 is disposed at the lower portion of the flat portion 102.

The upper and lower widths of the bent portions 130 are formed to be larger than the upper and lower widths of the flat portion 102.

The convex portion 110 is disposed on the left side or the right side of the concave portion 120.

In this embodiment, the bent portion 130 formed on the upper portion is formed with the concave portion 120, the convex portion 110, and the concave portion 120 in order from the left. That is, the bent portion 130 formed on the upper portion is formed with one convex portion 110 with two concave portions 120. The bending portion 130 is disposed such that the lower end of the protruding piece 101 is lower than the upper end of the bending portion 130 formed on the upper portion.

The convex portion 110 and the concave portion 120 are elongated in the left-right direction.

The lengths of the concave portion 120 and the convex portion 110 are different. In this embodiment, the concave portion 120 is formed longer than the convex portion 110.

At least one of the convex portion 110 and the concave portion 120 is formed into a circular arc shape in vertical cross section.

Preferably, the vertical cross-sectional shape of the convex portion 110 and the concave portion 120 is an arc shape whose center angle is smaller than 180 degrees.

The left and right sides of the convex portion 110 and the concave portion 120 are formed to be clogged. The left or right side surfaces of the convex portion 110 and the concave portion 120 which are not connected to the concave portion 120 or the convex portion 110 are formed to be inclined.

The connecting surface 103 connecting the concave portion 120 and the convex portion 110 is formed to be inclined. Corners connecting the connecting surface 103 to the recess 120 and the convex portion 110 are rounded.

Preferably, the connecting surface 103 is formed so as to be inclined so that the convex portion 110 becomes narrower in the vertical direction or in the width direction toward the front.

The connecting surface 103 is disposed at the upper or lower portion and the left or right side of the convex portion 110 and the concave portion 120, respectively.

At least two bent portions 130 and 130 'are formed, and the two bent portions 130 and 130' are arranged along the vertical direction. That is, the two bent portions 130 and 130 'are disposed at the upper portion and the lower portion, respectively.

The convex portion 110 on the upper side and the convex portion 110 'on the lower side are staggered from each other in the left-right direction.

The bent portion 130 'at the bottom is formed from the left side of the convex portion 110', the concave portion 120 ', and the convex portion 110'.

The upper bent portion 130 is formed to have a smaller overall width than the lower bent portion 130 '.

The lower edges of both sides of the lower bent portion 130 'are rounded.

2 and 4, the convex portion 110 and the concave portion 120 of the upper bending portion 130 and the concave portion 120 'and the convex portion 110' of the lower bending portion 130 ' 'Is disposed in front of the horizontal connection surface 107 connecting the concave portion 120 at the upper portion and the concave portion 120' at the lower portion and the front and rear thicknesses . The horizontal connecting surface 107 is curved convexly in an arcuate shape forward.

The length of the concave portion 120 at the upper portion and the length of the concave portion 120 'at the lower portion are differently formed. In this embodiment, the recess 120 'located below the recess 120 is formed to have a long length. More specifically, both ends of the lower recess 120 'are formed closer to the center line of the mold body 100 than the center line c2 of the recess 120 on the upper side. 2, there is no connection portion between the concave portion 120 on the upper left side and the convex portion 110 adjacent to the convex portion 110, and the convex portion 110 and the concave portion 120 A concave portion 120 and a concave portion 120. The concave portion 120 and the concave portion 120 are connected to each other by a connecting portion 103. The convex portion 110 ' And the lower end of the convex portion 110 ', so that the shape of the upper and lower surfaces of the convex portion and the concave portion is different from that of both sides.

6, a rear concave portion 110a is formed in a portion where the convex portion 110 is formed on the rear surface of the mold body 100 and a rear convex portion 120a is formed in a portion where the concave portion 120 is formed . That is, the rear surface of the mold body 100 is formed to correspond to the entire surface. The horizontal connecting surface connecting the rear convex portion 120a on the upper side and the rear convex portion 120'a on the lower side is formed to be curved in an arc shape, and the rear convex portion 120a on the upper side and the rear convex portion 120a on the lower side The connection surface connecting the recess 110'a is formed to be inclined.

The horizontal connecting surface connecting the upper convex portion 120a and the lower convex portion 120'a has a rear convex portion 120a on the upper side and a rear concave portion 110'a on the lower side It is placed behind the connecting side.

Hereinafter, the tread formed through the above-described mold will be described.

7, the tire tread includes a tread body 200 and a sipe 203 formed on the tread body 200. The sieve 203 is attached to the tread body 200 And a second siphon surface 202 facing the first siphon surface 201. The first siphon surface 201 and the second siphon surface 202 are formed by a first siphon surface 201, The convex portion 210 and the concave portion 220 are alternately formed on at least one of the convex portion 210 and the concave portion 220. The convex portion 210 and the concave portion 220 are elongated in the right and left direction, At least one of the convex portion 210 and the concave portion 220 has a circular arc shape in vertical cross section and the concave portion 220 and the convex portion 210 have a circular arc shape, And the connecting surface 203 connecting the convex portion 210 is formed to be inclined.

The tread body 200 is formed in a block shape.

A plurality of sipes 203 are formed on the tread body 200.

The siphon 203 is formed by a first siphon surface 201 formed on the tread body 200 and a second siphon surface 202 facing the first siphon surface 201. The first siphon surface 201 and the second siphon surface 202 are spaced apart from each other.

At least one of the first and second side surfaces 201 and 202 is formed with a bent portion 230 in which the convex portion 210 and the concave portion 220 are alternately formed.

In this embodiment, the convex portion 210 and the concave portion 220 are formed on the first sifface 201.

The second saffron surface 202 is formed to correspond to the first saffron surface 201.

The convex portion 210 and the concave portion 220 are elongated in the left and right direction.

The lengths of the concave portion 220 and the convex portion 210 are different. In this embodiment, the concave portion 220 of the upper bent portion 230 is longer than the convex portion 210 in the lateral direction.

The vertical cross-sectional shape of the convex portion 210 and the concave portion 220 is formed in an arc shape.

The connecting surface 203 connecting the concave portion 220 and the convex portion 210 is formed obliquely. Specifically, the connecting surface 203 is formed so as to be inclined so that the convex portion 210 has a vertical width or a left-right width smaller toward the second sipe surface 202.

Preferably, the first saffron surface 201 is formed so as to correspond to the front surface shape of the Saif molding die. The second siphon surface 202 is formed to correspond to the shape of the rear surface of the mold for siphoning. Therefore, the detailed description of the shapes other than the bent portion 230 will be omitted.

Hereinafter, Table 1 shows the result of comparing the longitudinal stiffness and the torsional stiffness of the tread according to one embodiment of the present invention based on the tread by applying a conventional flat rectangular sipe shape to a percent (%) ratio .

Comparative Example Example Longitudinal stiffness 100 (1.6 kgf) 100 (1.6 kgf) Torsional stiffness 100 (2.2 kgf) 120 (2.7 kgf)

As shown in Table 1, the tread of the present invention can improve the torsional rigidity of the tire while maintaining the longitudinal rigidity, so that the vehicle handling performance can be further improved.

In the above experiment, after forming the specimen in square shape, fix the specimen with a vise, and then measure the push / pull gage when reaching a certain distance (20 mm) by applying the pushing force. At this time, the direction of pushing the specimen is the edge side (right side or left side) of the center of the sieve. The stiffness values above are measured five times in total and are averaged.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the following claims .

DESCRIPTION OF REFERENCE NUMERALS
100: mold body 110:
120: concave portion 130: bent portion
103: connecting surface

Claims (7)

A mold comprising a plate-shaped metal body,
A bent portion formed on the front surface of the mold body, the convex portion and the concave portion alternately formed,
Wherein the convex portion and the concave portion are elongated in the right and left direction,
Wherein a length of the concave portion and a length of the convex portion are different from each other,
Wherein at least one of the convex portion and the concave portion has an arc-shaped vertical cross section,
A connecting surface connecting the concave portion and the convex portion is inclined,
There is no connection portion between the concave portion 120 on the upper left side and the convex portion 110 adjacent to the concave portion 120. A connection portion 103 is provided between the convex portion 110 and the concave portion 120 on the upper right side, The upper end of the concave portion 120, the convex portion 110 and the concave portion 120 and the convex portion 110 ', the concave portion 120' and the convex portion 110 ' And a connecting portion (103) is formed between the lower end of the mold and the upper and lower surfaces of the convex portion and the concave portion. The method according to claim 1,
Wherein a central angle of the convex portion and the concave portion having a circular cross section in a vertical section is smaller than 180 degrees. 3. The method according to claim 1 or 2,
The convex portion is disposed on the left or right side of the concave portion,
Wherein at least two bent portions are formed, and the two bent portions are disposed along the vertical direction. The method of claim 3,
Wherein the convex portion on the upper side and the convex portion on the lower side are staggered from each other. 5. The method of claim 4,
Wherein a length of the concave portion on the upper side and a length of the concave portion on the lower side are different from each other. 3. The method according to claim 1 or 2,
Wherein a rear concave portion is formed in a portion where the convex portion is formed and a rear convex portion is formed in a portion where the concave portion is formed, on a rear surface of the mold main body. delete
KR1020150122333A 2015-08-31 2015-08-31 Mold for forming tread sipes and tread KR101741081B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150122333A KR101741081B1 (en) 2015-08-31 2015-08-31 Mold for forming tread sipes and tread

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150122333A KR101741081B1 (en) 2015-08-31 2015-08-31 Mold for forming tread sipes and tread

Publications (2)

Publication Number Publication Date
KR20170025616A KR20170025616A (en) 2017-03-08
KR101741081B1 true KR101741081B1 (en) 2017-05-29

Family

ID=58404415

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020150122333A KR101741081B1 (en) 2015-08-31 2015-08-31 Mold for forming tread sipes and tread

Country Status (1)

Country Link
KR (1) KR101741081B1 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005153870A (en) * 2003-11-20 2005-06-16 Goodyear Tire & Rubber Co:The Three-dimensional sipe for tread
KR101467471B1 (en) * 2013-07-02 2014-12-10 금호타이어 주식회사 Pneumatic tire

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100913597B1 (en) 2008-05-15 2009-08-26 금호타이어 주식회사 Snow tire

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005153870A (en) * 2003-11-20 2005-06-16 Goodyear Tire & Rubber Co:The Three-dimensional sipe for tread
KR101467471B1 (en) * 2013-07-02 2014-12-10 금호타이어 주식회사 Pneumatic tire

Also Published As

Publication number Publication date
KR20170025616A (en) 2017-03-08

Similar Documents

Publication Publication Date Title
US20180001710A1 (en) Pneumatic tire
JPWO2007083657A1 (en) Pneumatic tire
US20180001713A1 (en) Pneumatic tire
JP2013512139A5 (en)
JP2009190558A (en) Pneumatic tire
CN105829140B (en) Tread strip including the bending pattern block for carrying siping
JP2015009798A (en) Pneumatic tire
US11554613B2 (en) Pneumatic tire, a tread band, and a tread block comprising a sipe, and a lamella plate for the manufacture thereof
US20180001709A1 (en) Pneumatic tire
JP2008049730A (en) Pneumatic tire
JP2009006870A (en) Pneumatic tire
US20170066290A1 (en) Pneumatic tire
JP2014156190A (en) Tire
KR101741081B1 (en) Mold for forming tread sipes and tread
JP5797452B2 (en) Sipe blade and tire manufacturing method
JP6251082B2 (en) tire
US20180001711A1 (en) Pneumatic tire
CN110893741B (en) Pneumatic tire
KR101739506B1 (en) The Tire Patterns including 3D Zipper Slot and Kerf
KR101845720B1 (en) Tyre with improved sipe
JP2006044570A (en) Pneumatic tire and its manufacturing method
JP6126572B2 (en) Heavy duty pneumatic tire
KR101504678B1 (en) Forming beams
CN108621704B (en) Pneumatic tire
EP3168063A1 (en) Pneumatic tire

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
AMND Amendment
E601 Decision to refuse application
AMND Amendment
X701 Decision to grant (after re-examination)
GRNT Written decision to grant