CN210100461U

CN210100461U - Improved tyre vulcanizing mould

Info

Publication number: CN210100461U
Application number: CN201920889632.6U
Authority: CN
Inventors: 黄鑫焱
Original assignee: Cheng Shin Rubber Xiamen Ind Ltd
Current assignee: Cheng Shin Rubber Xiamen Ind Ltd
Priority date: 2019-06-13
Filing date: 2019-06-13
Publication date: 2020-02-21
Anticipated expiration: 2029-06-13

Abstract

The utility model discloses a modified cover tire vulcanizing mold, it is assembled by the last mould and the lower mould of mutual symmetry, the closure forms, it leaves the die cavity to go up mould and the closed central point of lower mould and put, equidistant in the different positions that are close to the die cavity, the circumference sets up a plurality of exhaust holes, each exhaust hole is the diplopore structure, each exhaust hole is extended to the outside by last mould and lower mould inboard, each exhaust hole contains interior exhaust hole and outer exhaust hole, interior exhaust hole the inner is established on the die cavity, the body of mould and lower mould is gone up to exhaust hole outer end and link up in the outer exhaust hole connection, the aperture of interior exhaust hole is less than the aperture of outer exhaust hole, the axial length of interior exhaust hole is less than the axial length of outer. The double-aperture exhaust holes not only ensure good exhaust performance and make the outer tire attractive in appearance, but also facilitate dredging operation of an electric drill screw tap after rubber materials are accumulated in the exhaust holes, and prevent the needle from being broken. Meanwhile, the double-aperture exhaust hole is simple in structure, low in cost, high in practicability and capable of being used for outer tire molds of various vehicles.

Description

Improved tyre vulcanizing mould

Technical Field

The utility model relates to a mould especially indicates a modified cover tire vulcanization mould utensil.

Background

As shown in fig. 1 and 2, a conventional outer tire vulcanizing mold set T 'is assembled and closed by an upper mold T1' and a lower mold T2 'which are symmetrical to each other, a cavity 1' is left in the center of the mold set T ', and a green tire 2' passes through the cavityThe auxiliary part is closely matched with the cavity 1 ', gas can be generated between the cavity 1 ' and the green tire 2 ' in the vulcanization process, and in order to avoid bad appearance of the outer tire after vulcanization, the exhaust holes 3 ' are usually arranged at different positions of the upper die and the lower die, which are close to the cavity 1 ', so that rough rubber is formed on the tire bead and the tire bead at the corresponding positions of the outer tire. The vent holes 3' are usually small in diameter d for aesthetic reasons, such as the diameter d of a vulcanizing mold for a bicycle cover

The air outlet 3' is not easy to dredge after accumulating the sizing material; in addition, the slender exhaust holes 3' have limited exhaust effect, and are easy to cause appearance defects of the tire casing. The main reasons are as follows: the exhaust hole 3 'needs to be dredged with the help of the electric drill screw tap after accumulating the sizing material, and because the supporting electric drill screw tap length is also longer, not only easily the broken needle blocks up exhaust hole 3' at the mediation in-process, causes the exhaust unsmooth, influences cover tyre appearance quality, and the mediation operation is inconvenient simultaneously, consuming time for a long time, inefficiency. Although the mold structure without vent holes is also researched in the industry, and the introduction of a part of tire molds is also carried out, and the above problems can be avoided after the production confirmation, the mold without vent holes is generally complex in structure, high in process requirement and greatly increased in mold manufacturing cost, so that the mold cannot be widely used on the tire casing mold of each vehicle.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art not enough and provide a under the prerequisite of guaranteeing good exhaust performance, simple structure, simple and easy, the with low costs and easy to carry out's modified cover tire vulcanization mould utensil.

In order to achieve the above purpose, the solution of the present invention is:

the utility model provides an improved cover tire vulcanizing mold, it is assembled, closed by the last mould and the lower mould of mutual symmetry and forms, the closed central point of last mould and lower mould puts and leaves the die cavity, different positions that are close to the die cavity are equidistant, the circumference sets up a plurality of exhaust holes, each exhaust hole is double-aperture structure, each exhaust hole is extended by last mould and lower mould inboard outside, each exhaust hole contains interior exhaust hole and outer exhaust hole, interior exhaust hole inner is established on the die cavity, outer exhaust hole connects interior exhaust hole outer end and link up the body of last mould and lower mould, the aperture of interior exhaust hole is less than the aperture of outer exhaust hole, the axial length of interior exhaust hole is less than the axial length of outer exhaust hole.

Preferably: the aperture of the inner vent hole is designed as

The aperture of the outer vent hole is 2 to 10 times of the aperture of the inner vent hole.

Preferably: the axial length of the inner vent hole does not exceed 1/3 of the thickness of the upper die body and the lower die body.

Preferably: the axial length of the inner vent is designed to be 5 mm-10 mm.

Preferably: the mould is a ring piece mould, and the positions of the tire bead and the tire bead of the cavity are respectively provided with the exhaust holes.

Preferably: the mold is a crude rubber mold, and the positions of the tread pattern, the tire bead and the tire bead of the cavity are respectively provided with the exhaust holes.

After the structure of the oil adding device is adopted, the utility model discloses set up the exhaust hole at the equidistance of different positions, the circumference that are close to the die cavity, each exhaust hole is extended to the outside by last mould and lower mould inboard, contains interior exhaust hole and outer exhaust hole, and interior exhaust hole the inner is established on the die cavity, and the body of lower mould is gone up to outer exhaust hole outer end and link up in the connection of outer exhaust hole. The aperture of the inner vent hole is smaller than that of the outer vent hole, the axial length of the inner vent hole is smaller than that of the outer vent hole, and the vent holes with double apertures not only ensure good exhaust performance and make the appearance of the outer tire attractive, but also facilitate dredging operation of an electric drill screw tap after rubber materials are accumulated in the vent holes, and prevent needle breakage. Meanwhile, the double-aperture exhaust hole is simple in structure, low in cost, high in practicability and capable of being used for outer tire molds of various vehicles.

Drawings

FIG. 1 is a schematic cross-sectional view of a conventional tire casing vulcanizing mold;

FIG. 2 is a schematic view of a conventional tire casing curing mold engaged with a green tire;

FIG. 3 is a schematic cross-sectional view of the vulcanizing mold of the present invention;

fig. 4 is an enlarged view of a portion a in fig. 3.

Detailed Description

In order to further explain the technical solution of the present invention, the present invention is explained in detail by the following embodiments.

Fig. 3 shows that the utility model discloses an outer tire mould structure, vertical direction sets for radially in the picture, and the axial is set for to horizontal direction, and the one side that is close to mould group T closed position represents the inboard, and the one side of keeping away from mould group T closed position represents the outside.

In fig. 3, the mold set T is assembled and closed by an upper mold T1 and a lower mold T2 which are symmetrical to each other, a cavity 1 is left at the closed center position of the mold set T, and the cavity 1 is used for placing a green tire and vulcanizing the green tire into an outer tire. Exhaust holes 3 are arranged at different positions of the upper die T1 and the lower die T2 close to the cavity 1, and the exhaust holes 3 are equally spaced and circumferentially penetrate through the upper die T1 and the lower die T2. In the embodiment, a ring piece mold structure is taken as an example, so that the exhaust holes 3 are respectively arranged at the positions of a tire bead 11 and a tire bead 12 of a cavity 1; in the case of the green rubber mold structure, the vent holes 3 are provided at the positions of the tread pattern 10, the bead 11, and the bead 12, respectively. The utility model is mainly characterized in that: the vent holes 3 on the upper die T1 and the lower die T2 are of double-hole design.

As shown in fig. 4, the exhaust hole 3 extends from the inner side of the upper mold T1 and the lower mold T2 to the outer side, and includes an inner exhaust hole 3a and an outer exhaust hole 3b, the inner end of the inner exhaust hole 3a is provided on the cavity 1, and the outer exhaust hole 3b is connected to the outer end of the inner exhaust hole 3a and penetrates through the bodies of the upper mold T1 and the lower mold T2, so as to form the exhaust hole 3 with double apertures. The design of the exhaust holes 3 with double apertures not only ensures good exhaust performance and enables the outer tire to have attractive appearance, but also is easy to dredge by an electric drill screw tap after the rubber materials are accumulated in the exhaust holes 3, and the needle is not easy to break. Specifically, the method comprises the following steps: the aperture d1 of the inner vent holes 3a is smaller than the aperture d2 of the outer vent holes 3b, preferably: the aperture d1 of the inner vent hole 3a is designed toThe pore diameter d2 of the outer vent holes 3b is 2 to 10 times larger than the pore diameter d1 of the inner vent holes 3 a. The inner vent hole 3a is provided with a small holeThe diameter is to make the rubber on the outer tire thinner and improve the appearance; the outer exhaust hole 3b is provided with a large aperture so as to facilitate the dredging operation of an electric drill screw tap, prevent the needle from being broken and assist the exhaust effect of the inner exhaust hole 3 a. The axial length L1 of the inner vent holes 3a is smaller than the axial length L2 of the outer vent holes 3b, and the axial length L1 of the inner vent holes 3a does not exceed 1/3 of the body thickness of the upper and lower dies T1 and T2, preferably: the axial length L1 of the inner vent hole 3a is designed to be 5-10 mm, and the inner vent hole 3a is arranged to be shorter so that the rubber on the outer tire is shorter, the appearance is improved, and the broken needle of the electric drill screw tap is not easy to break; and the outer exhaust hole 3b is longer, so that the exhaust performance can be improved, and meanwhile, the dredging operation and the efficiency are easy to improve. Of course, the design of the aperture d2 and the axial length L2 of the outer exhaust holes 3b must consider the strength of the upper die T1 and the lower die T2, and the aperture d2 and the axial length L2 are reasonably set according to the thickness of the upper die body and the lower die body, so as to ensure the service life of the die. In addition, the exhaust hole 3 structure in two apertures is simple and easy, can not cause the increase of mould cost, promotes mediation operating efficiency, and the practicality is high, can generally be used for the cover tire mould of multiple vehicle.

To sum up, the utility model discloses set up exhaust hole 3 at the different positions equidistant, the circumference that are close to die cavity 1, each exhaust hole 3 is extended to the outside by last mould T1 and lower mould T2 inboard, contains interior exhaust hole 3a and outer exhaust hole 3b, and interior exhaust hole 3a inner is established on die cavity 1, and outer exhaust hole 3b connects interior exhaust hole 3a outer end and link up the body of last mould T1 and lower mould T2. The aperture d1 of the inner vent hole 3a is smaller than the aperture d2 of the outer vent hole 3b, so that the axial length L1 of the inner vent hole 3a is smaller than the axial length L2 of the outer vent hole 3b of the double-aperture vent hole 3 formed in the above way, so that good exhaust performance is ensured, the appearance of the outer tire is attractive, and after rubber materials are accumulated in the vent hole 3, the electric drill screw tap dredging operation is easy, and the needle is not easy to break. Meanwhile, the exhaust holes 3 with double apertures have simple structure, low cost and high practicability, and can be universally used for outer tire vulcanizing molds of various vehicles.

The above embodiments and drawings are not intended to limit the form and style of the present invention, and any suitable changes or modifications made by those skilled in the art should not be construed as departing from the scope of the present invention.

Claims

1. The utility model provides a modified cover tire vulcanization mould utensil, its by the last mould of mutual symmetry and lower mould assembly, closed form, go up the closed central point of mould and lower mould and put and leave die cavity, its characterized in that: the exhaust holes are arranged at different positions close to the cavity at equal intervals and on the circumference, each exhaust hole is of a double-hole-diameter structure, each exhaust hole extends outwards from the inner side of the upper die and the inner side of the lower die, each exhaust hole comprises an inner exhaust hole and an outer exhaust hole, the inner end of each inner exhaust hole is arranged on the cavity, each outer exhaust hole is connected with the outer end of each inner exhaust hole and penetrates through the bodies of the upper die and the lower die, the hole diameter of each inner exhaust hole is smaller than that of each outer exhaust hole, and the axial length of each inner exhaust hole is smaller than.

2. The improved tire curing mold of claim 1 wherein: the aperture of the inner vent hole is designed as

3. The improved tire curing mold of claim 1 wherein: the axial length of the inner vent hole does not exceed 1/3 of the thickness of the upper die body and the lower die body.

4. The improved tire curing mold of claim 3 wherein: the axial length of the inner vent is designed to be 5 mm-10 mm.

5. The improved tire curing mold of claim 1 wherein: the mould is a ring piece mould, and the positions of the tire bead and the tire bead of the cavity are respectively provided with the exhaust holes.

6. The improved tire curing mold of claim 1 wherein: the mold is a crude rubber mold, and the positions of the tread pattern, the tire bead and the tire bead of the cavity are respectively provided with the exhaust holes.