CN109501335B - Inner side evacuation type mold core of inflation-free tire and tire forming mold - Google Patents

Abstract

The invention belongs to the technical field of tire forming molds, and particularly relates to an inner side evacuation type mold core of a inflation-free tire and a tire forming mold. The inner side evacuating type mold core of the inflation-free tire comprises a plurality of fan-shaped mold core units, and the mold core units are spliced to form an annular structure; the mold core unit comprises a forming part positioned on the outer side of the mold core unit, and a mold core groove is formed in the outer surface of the forming part. In this application, cut apart the mold core into a plurality of sectorial mold core units to conveniently pull out the mold core, when the single sectorial mold core unit is pried to the elasticity that utilizes rubber material in mold core drawing of patterns, pull out the mold core relatively easily, solved because of the current mold core leads to the technical problem of drawing of patterns difficulty for whole annular structure.

Description

Inner side evacuation type mold core of inflation-free tire and tire forming mold

Technical Field

The invention belongs to the technical field of tire forming molds, and particularly relates to an inner side evacuation type mold core of a inflation-free tire and a tire forming mold.

Background

Tires are ground-engaging rolling annular elastic rubber articles assembled on various vehicles or machines, and can be broadly divided into pneumatic tires and inflation-free tires. The inflation-free tire is a tire which does not need to be inflated, and the supporting and cushioning performances are realized only by utilizing the materials and the structures of the tire. Although the inflation-free tire does not need to be inflated, dangerous situations such as tire burst and the like do not occur, the inflation-free tire is poor in anti-seismic performance and low in comfort level during use, so that popularization and use are difficult.

In the inflation-free tire manufacturing process, the mold core can be utilized, the mold core mainly plays a role in evacuating the inside of the tire from the inner side of the tire, and meanwhile, blades and ribs are required to be added in the tire, so that the tire has better shock absorption performance, comfort level and structural strength.

The existing mould core is of an integral annular structure, and the mould core is difficult to demould due to the existence of structures such as blades, ribs and the like.

Disclosure of Invention

First, the technical problem to be solved

Aiming at the technical problem that demolding is difficult due to the fact that the mold core is of an integral annular structure in the prior art, the invention provides an inner side evacuation type mold core of a inflation-free tire.

Another object of the present invention is to provide a tire building mold employing the above-described inflation-free tire inner side evacuation mold core.

(II) technical scheme

In order to achieve the above purpose, the main technical scheme adopted by the invention comprises the following steps:

the inner side of the inflation-free tire is evacuated, wherein the mold core comprises a plurality of fan-shaped mold core units, and the mold core units are spliced to form an annular structure;

the mold core unit comprises a forming part positioned on the outer side of the mold core unit, and a mold core groove is formed in the outer surface of the forming part.

Preferably, the core grooves are arranged in the direction of the core unit from the upper surface to the lower surface and/or in the circumferential direction of the outer side of the core unit.

Preferably, the core recesses are located on individual core units and/or between adjacent core units.

Preferably, the core unit is provided with at least one core groove.

Preferably, when a plurality of core grooves are provided on the core unit, the plurality of core grooves are uniformly provided.

Preferably, the thickness of the outer side of the molding portion is different from the thickness of the inner side thereof.

Preferably, the core unit comprises a plurality of uniformly distributed core units.

Preferably, the die core unit comprises a plurality of templates which are distributed up and down, and the templates are sequentially attached to each other along the thickness direction of the die core.

Preferably, the mold core further comprises a fixed seat, and a plurality of fixed columns are arranged on the fixed seat;

the mold core unit further comprises a fixing part positioned on the inner side of the mold core unit, a fixing hole matched with the fixing column is formed in the fixing part, and the fixing part is sleeved on the fixing column through the fixing hole.

A tire building mold comprising a inflation free tire inside evacuation mold core as described above.

(III) beneficial effects

The beneficial effects of the invention are as follows: the inner side of the inflation-free tire is provided with the evacuation type mold core, the mold core is divided into a plurality of fan-shaped mold core units, so that the mold core can be conveniently pulled out, and the mold core is easier to pull out when the single fan-shaped mold core unit is pried by the elasticity of the rubber material in the mold core demolding process.

Drawings

FIG. 1 is a schematic perspective view of an inner side evacuation mold core of a non-pneumatic tire according to an embodiment of the present invention;

FIG. 2 is a side view of an inner side evacuation mold core of a pneumatic tire according to an embodiment of the present invention;

FIG. 3 is a top view of an inner side evacuating mold core of a pneumatic tire according to an embodiment of the present invention;

FIG. 4 is a schematic view of a die core unit according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a fixing base according to an embodiment of the present invention.

[ reference numerals description ]

1: a core unit; 2: a fixing seat;

11: a molding part; 12: a mold core groove; 13: a fixing part;

121: a first mold core groove; 122: a second mold core groove;

131: a fixing hole;

21: and fixing the column.

Detailed Description

The invention will be better explained by the following detailed description of the embodiments with reference to the drawings.

As shown in fig. 1 to 5, in the present embodiment, there is provided an inside evacuation type mold core for a inflation-free tire, wherein the mold core includes a plurality of mold core units 1 having a fan shape, and the plurality of mold core units 1 are spliced to form a ring structure.

The core unit 1 comprises a forming section 11 on its outer side, the outer surface of the forming section 11 being provided with a core groove 12.

The mould core is divided into a plurality of fan-shaped mould core units 1 so as to be conveniently pulled out, and when the single fan-shaped mould core unit 1 is pried by the elasticity of rubber materials in the mould core demoulding process, the mould cores are easily pulled out, and the mould cores are combined to form a circle when the tyre is manufactured.

The core grooves 12 are arranged in the direction of the upper to lower surface of the core unit 1 and/or in the circumferential direction of the outer side of the core unit 1.

When the core unit 1 is placed horizontally, the arrangement of the core grooves 12 in the direction from the upper surface to the lower surface of the core unit means that both ends of the core grooves 12 are disposed through the upper surface and the lower surface of the core unit 1, and in this embodiment, the core grooves 12 disposed in this form are first core grooves 121, and preferably, the first core grooves 121 are disposed vertically with respect to the horizontal plane or are disposed obliquely with respect to the horizontal plane.

The first core groove 121 is used for shaping the blades on the tire, and can be designed into any shape according to the requirement, and the blades on two sides of a single groove of the tire after shaping can be of any shape and thickness, so that the outlet of the first core groove 121 can be of any shape. Such as square, round, irregular, four corners of square reinforced into triangles, arcs, etc.

The core grooves 12 are circumferentially arranged along the outer side of the core unit 1, specifically, when the core unit 1 is placed horizontally, the core grooves 12 penetrate from one end to the other end of the core unit 1, and the core grooves 12 arranged in this way are second core grooves 122.

The second core groove 122 is used for forming a reinforcing rib on the tire, and the reinforcing rib can be used for reinforcing the use strength of the tire and the comfort effect of the tire, and the core groove 12 with different shapes and sizes can be formed according to the strength of the tire required by the use vehicle. The second core groove 122 may be one or more components (in the case of a tire, the reinforcing bead may be one or more, or no reinforcing bead is present). The second core grooves 122 may be provided in different heights, lengths and shapes according to actual needs, and thus, the portions of the molded tire along the inner wall direction of the mold clamping line and the reinforcing ribs extending along the blade direction may be designed in different heights and lengths, and in different shapes according to needs.

The die core unit 1 comprises a plurality of die plates which are distributed up and down, and the die plates are sequentially attached to each other along the thickness direction of the die core. Dividing the core unit 1 into a plurality of templates further assists in the demolding of the cores.

According to the size of the wheel, the mould core can be designed into different sizes and thicknesses, and the mould core and a plurality of mould plates of the mould form a closed space to heat the rubber material to form a tyre finished product. After the tyre is formed, the tyre consists of a tyre main body, grooves, blades, reinforcing ribs and clamping grooves (the assembly of the tyre and the tyre can be a clamping groove, a straight edge or various shapes). According to the intensity required by the vehicle, the space size and any shape of the mold core groove can be designed to change, and the tire main body patterns can be adjusted, so that the shape and size of the groove on the inner side of the tire, the shape, size, length and thickness of the blade, and the shape, size, length and thickness of the reinforcing rib, namely the mold core groove can be changed according to the requirement of the product. For example, the shape of the open end of the mold core can be square, round, irregular, triangular, arc-shaped and the like.

As a preferred option, the core unit 1 comprises an upper and a lower template, which are mutually attached, on which one part of the core recess 12 is located and on which the other part is arranged. For example, the core unit 1 is provided with a second core groove 122, a part of the second core groove 122 is disposed on the upper die plate, and the other part of the second core groove 122 is disposed on the lower die plate, and when the upper die plate and the lower die plate are butted with each other, a complete second core groove is formed between the upper die plate and the lower die plate.

When the core unit 1 is divided into a plurality of mold plates in the thickness direction, that is, when the core unit has a multi-layer core-pulling function, the thickness between the plurality of mold plates may be the same or different, and it is needless to say that the core unit 1 is not excluded as a whole.

The core grooves 121 are located on the individual core units 1 and/or between adjacent core units 1.

In the present embodiment, the mold core unit 1 is provided with the mold core grooves 121, but the mold core unit 1 may not be provided with the mold core grooves 121 according to actual needs.

The thickness of the molding portion 11 on the outside is preferably different from the thickness of the molding portion 11 on the inside, and the thickness of the molding portion 11 on the outside is preferably larger than the thickness of the molding portion on the inside. After the tire is manufactured into a finished product by adopting the mold, the inner side of the tire is small in the inner side outlet, or the inner side is small in the inner side and large in the outlet, and even the inner side and the outlet can be made to be the same size.

The mould core comprises a plurality of evenly distributed mould core units 1. The mold core further comprises a fixed seat 2, and a plurality of fixed columns 21 are arranged on the fixed seat 2. The core unit 1 further comprises a fixing portion 13 located on the inner side of the core unit, fixing holes 131 matched with the fixing columns 21 are formed in the fixing portion 13, and the fixing portion 13 is sleeved on the fixing columns 21 through the fixing holes 131.

In this embodiment, there is also provided a tire building mold including the inflation-free tire inside evacuation mold core as described above.

When the mould is used for manufacturing the tyre, the adopted material is not limited to rubber materials, and can be used in any way with the characteristic of rubber materials.

The technical principles of the present invention have been described above in connection with specific embodiments, which are provided for the purpose of explaining the principles of the present invention and are not to be construed as limiting the scope of the present invention in any way. Other embodiments of the invention will be apparent to those skilled in the art from consideration of this specification without undue burden.

Claims (7)

1. An inflation-free tire inner side evacuation type mold core, which is characterized in that: the mold core comprises a plurality of fan-shaped mold core units, and the plurality of mold core units are spliced to form an annular structure;

the mold core unit comprises a forming part positioned at the outer side of the mold core unit, and a mold core groove is formed in the outer surface of the forming part;

the mould core grooves are a plurality of first grooves (121) which are arranged along the direction from the upper surface to the lower surface of the mould core unit and one or more second grooves (122) which are arranged along the circumferential direction of the outer side surface of the mould core unit; the plurality of first grooves (121) are uniformly arranged; the first grooves (121) arranged in the direction from the upper surface to the lower surface are arranged perpendicular to the second grooves (122) arranged circumferentially.

2. The inflation-free tire inner side evacuable mold core of claim 1, wherein the mold core grooves are located on a single mold core unit and/or between adjacent mold core units.

3. The inflation-free tire inner evacuation mold core of claim 1, wherein the molding section has an outer side thickness different from an inner side thickness thereof.

4. The inflation-free tire inner side evacuable mold core of claim 1, wherein the mold core comprises a plurality of uniformly distributed mold core units.

5. The inner side evacuation type mold core for a non-pneumatic tire according to claim 1, wherein the mold core unit comprises a plurality of mold plates which are vertically distributed, and the plurality of mold plates are sequentially attached to each other in a thickness direction of the mold core.

6. The inner side evacuation type mold core of a non-pneumatic tire according to claim 1, wherein the mold core further comprises a fixing base, and a plurality of fixing columns are arranged on the fixing base;

the mold core unit further comprises a fixing part positioned on the inner side of the mold core unit, a fixing hole matched with the fixing column is formed in the fixing part, and the fixing part is sleeved on the fixing column through the fixing hole.

7. A tire building mold comprising the inflation-free tire inside evacuation mold core of any one of claims 1 to 6.