CN218966216U

CN218966216U - Radial tire mold

Info

Publication number: CN218966216U
Application number: CN202320085207.8U
Authority: CN
Inventors: 洪志祥
Original assignee: Cheng Shin Rubber Xiamen Ind Ltd
Current assignee: Cheng Shin Rubber Xiamen Ind Ltd
Priority date: 2023-01-30
Filing date: 2023-01-30
Publication date: 2023-05-05
Anticipated expiration: 2033-01-30

Abstract

The utility model discloses a radial tire mold, which comprises a pattern mold, a mold parting surface, a glue overflow groove, a diversion hole, an upper bead mold parting surface, a lower bead mold and a lower bead mold parting surface, wherein the tire mold is provided with the glue overflow groove, the glue overflow groove is arranged in a whole circle along the mold parting surface, the mold parting surface is simultaneously provided with the diversion hole, the diversion hole is communicated with the glue overflow groove, the axial length of the diversion hole is 2mm-4mm, and the radial depth of the diversion hole is 0.6mm-1.0mm. The utility model is provided with the pattern mold, the mold parting surface, the glue overflow groove, the diversion hole, the upper bead mold parting surface, the lower bead mold and the lower bead mold parting surface, and can meet the switching of different modes such as automatic removal or manual removal of the overflow glue by optimizing the glue overflow diversion structure on the radial tire mold, meanwhile, the combination deformation of the pattern blocks of the mold caused by the overflow glue is avoided, the repair cost of the mold is saved, and the service life of the mold is prolonged.

Description

Radial tire mold

Technical Field

The utility model relates to the technical field of tires, in particular to a radial tire mold.

Background

Radial tires are vulcanized by adopting segmented molds, and are generally composed of a shell and a cavity, wherein the cavity is a cavity forming the outer contour of the tire, an annular cavity is formed by a pattern block mold, an upper mold and a lower mold, and the shell is a component for driving the cavity to be opened and closed and is simultaneously used for completing the production process of heating and vulcanizing the tire.

In the tire vulcanization process, with the increase of the vulcanization times of the molds, certain gaps exist between the block mold of the radial tire mold cavity and the mold parting surface of the upper mold and between the block mold and the mold parting surface of the lower mold, glue is easily overflowed from the mold parting surface during vulcanization to cause glue to adhere to the mold to influence production, in addition, the gap between the mold parting surfaces is easily increased due to the laminated residual glue after multiple production, and the glue overflows inevitably from the tire after vulcanization, so that a glue overflow groove is usually formed between the cavity mold parting surfaces of the conventional radial tire mold.

The existing glue overflow grooves are generally divided into two types, namely a full-circle glue overflow groove, namely the glue overflow formed on the tire after vulcanization is full-circle, the existing full-circle glue overflow can solve the problem of residual glue clamping, the service life of the die is prolonged, and overhaul equipment is easy to entangle to cause inconvenience in overhaul operation; the other is intermittent overflow, namely a certain interval is arranged between two adjacent sections of overflow, so that maintenance operation is convenient, the interval part is easy to clamp after a period of operation, the clamp is difficult to remove, the gap is continuously increased, the mold pattern block is combined and deformed to generate tread overflow, the mold is required to be additionally repaired, the service life of the mold is prolonged, and the maintenance cost of the mold is increased.

Disclosure of Invention

The utility model aims to provide a radial tire mold for solving the problems in the prior art.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the radial tire mold comprises a pattern mold, a mold parting surface, a glue overflow groove, a diversion hole, an upper bead mold parting surface, a lower bead mold and a lower bead mold parting surface, wherein the glue overflow groove is arranged in a whole circle along the mold parting surface, the diversion hole is designed on the mold parting surface, and the diversion hole is communicated with the glue overflow groove.

Preferably, the axial length of the diversion hole is 2mm-4mm, the radial depth of the diversion hole is 0.6mm-1.0mm, and the circumferential width of the diversion hole is 1mm-3mm.

Preferably, the diversion holes are uniformly distributed on the parting surface of the die in the circumferential direction, are arranged according to the tread pattern pitch number, and preferably one to three diversion holes are arranged on average for each pattern pitch number.

Preferably, the glue overflow groove is arranged on the parting surface of the die in a circle in the circumferential direction, the axial width of the glue overflow groove is set to be 4mm-10mm, and the radial depth is set to be 0.5mm-2.0mm.

Compared with the prior art, the utility model has the following beneficial effects:

the utility model is provided with the pattern mold, the mold parting surface, the glue overflow groove, the diversion hole, the upper bead mold parting surface, the lower bead mold and the lower bead mold parting surface, and can meet the switching of different modes such as automatic removal or manual removal of the overflow glue by optimizing the glue overflow diversion structure on the radial tire mold, meanwhile, the combination deformation of the pattern blocks of the mold caused by the overflow glue is avoided, the repair cost of the mold is saved, and the service life of the mold is prolonged.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic cross-sectional view of A-A1 of the present utility model;

fig. 3 is an enlarged schematic view of the structure of the present utility model at B.

In the figure: pattern mould 1, mould die joint 11, overflow groove 12, guiding hole 13, last bead mould 2, last bead mould die joint 21, lower bead mould 3, lower bead mould die joint 31.

Description of the embodiments

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "provided," "connected," and the like are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.

The pattern mould 1, the mould parting surface 11, the glue overflow groove 12, the flow guide hole 13, the upper bead mould 2, the upper bead mould parting surface 21, the lower bead mould 3 and the lower bead mould parting surface 31 are all universal standard parts or parts known to the skilled person, and the structure and the principle of the pattern mould are all known by the skilled person through technical manuals or through routine experimental methods.

For convenience of explanation, first, the orientation of the tire is defined, the tire having a rotation center and an equatorial plane c.l., the direction around the rotation center of the tire being defined as the tire circumferential direction, the direction parallel to the rotation center of the tire in the tire cross-section width direction being defined as the tire axial direction, the direction perpendicular to the rotation center of the tire in the tire height direction being defined as the tire radial direction, the orientation of the tire mold being defined with reference to the orientation of the tire.

Referring to fig. 1-3, a radial tire mold comprises a pattern mold 1, a mold parting surface 11, a glue overflow groove 12, a diversion hole 13, an upper bead mold 2, an upper bead mold parting surface 21, a lower bead mold 3 and a lower bead mold parting surface 31, wherein the tire mold is provided with the glue overflow groove 12, the glue overflow groove 12 is arranged in a whole circle along the mold parting surface 11, the diversion hole 13 is designed on the mold parting surface 11 at the same time, and the diversion hole 13 is communicated with the glue overflow groove 12.

The axial length L13 of the diversion hole 13 is 2mm-4mm, the radial depth D13 of the diversion hole 13 is 0.6mm-1.0mm, meanwhile, the circumferential width W13 of the diversion hole 13 is 1mm-3mm, and if the value of the circumferential width W13 of the diversion hole 13 is too small, the radial depth D13 of the diversion hole 13 is too shallow, the cross section of the diversion hole 13 in the radial direction is too small, so that the smoothness of glue overflow inflow is affected; meanwhile, on the premise that the glue storage amount of the glue overflow groove 12 is certain, the glue overflow is possibly distributed in the area near the diversion holes 13, and the parting surface of the die is easy to generate glue clamping, so that the glue clamping is not easy to remove, and the service life of the die is influenced; on the contrary, if the circumferential width W13 of the diversion hole 13 is set too large, the radial depth D13 of the diversion hole 13 is set too deep, and then the cross section of the diversion hole 13 in the radial direction is too large, so that the overflow glue formed at the corresponding part of the diversion hole 13 is thicker, and the formed whole circle of overflow glue is difficult to be manually torn off, meanwhile, the overflow glue is unfavorable to be removed by adopting automatic equipment, so that the overflow glue can smoothly pass through the diversion hole 13 and finally enter the overflow glue groove 12 in the vulcanization process through the optimized setting of the size of the diversion hole 13, and the corresponding whole circle of overflow glue or intermittent overflow glue is formed according to the ratio of the glue storage amount of the overflow glue groove 12 to the tyre overflow glue amount, so that the overflow glue is manually removed or the overflow glue is removed by adopting automatic overhaul equipment, and meanwhile, the mould pattern block combination deformation caused by the overflow glue is avoided, the mould repair cost is saved, and the service life of the mould is prolonged.

The diversion holes 13 are circumferentially and uniformly distributed on the die parting surface 11, one to three diversion holes 13 are preferably arranged according to the tread pattern pitch number, the diversion holes 13 can be reasonably circumferentially distributed on the die parting surface 11, if the diversion holes 13 of each tread pattern pitch are excessively arranged, when complete circle type glue overflow is formed, the operation is inconvenient because of relatively difficult manual tearing, and if the diversion holes 13 of each tread pattern pitch are excessively arranged, the smoothness of the glue overflow entering the glue overflow groove 12 is influenced, the glue overflow removal operation is inconvenient because of the glue overflow is possibly caused because of the full glue overflow in the fit clearance between the die parting surfaces 11, and the service life of the tire die is possibly influenced by glue clamping.

The glue overflow groove 12 is arranged on the parting surface 11 of the die in a circle along the circumferential direction, the axial width L12 of the glue overflow groove 12 is set to be 4mm-10mm, the radial depth D12 is set to be 0.5mm-2.0mm, and a certain glue overflow amount can be stored in the vulcanization mold closing process by arranging the glue overflow groove 12, so that the combined deformation between pattern block dies caused by the glue clamping of the parting surface 11 of the die is avoided, the repair cost of the die is saved, and the service life of the die is prolonged.

According to the tire overflow amount Ag, the stored amount Bg of the overflow groove 12, when the stored amount B/overflow amount a=ratio C, the tire mold overflow forms two modes: (1) the ratio C epsilon (0.90-1.10), the tire forms a whole circle of overflow glue; the method is suitable for manually and directly tearing off the tire overflow glue; (2) the ratio C epsilon (1.20-1.60), the tire forms intermittent glue overflow; the method is suitable for removing the overflow glue of the tire by automatic equipment, when the overflow glue cannot be avoided in the vulcanization process, the overflow glue passes through the guide holes 13 and finally flows into the overflow glue grooves 12, due to certain difference of the overflow glue quantity of the tires with different specifications, the overflow glue quantity of the tires is supposed to be Ag, the storage glue quantity of the overflow glue grooves 12 of the mold is Bg, the ratio of the storage glue quantity B of the overflow glue grooves 12 of the mold to the overflow glue quantity A of the tire is C, namely C=B/A, when the ratio C is (0.90-1.10), the overflow glue grooves 12 on the mold finally form full-circle overflow glue on the tire, the root parts of the full-circle overflow glue are connected by the overflow glue formed by the guide holes 13, at the moment, the full-circle overflow glue removing mode is selected manually and directly tearing off, the overflow glue is not needed by adopting automatic equipment to remove the overflow glue to avoid winding maintenance equipment, when the ratio C is (1.20-1.60), the area of the overflow glue grooves 12 on the mold close to the guide holes 13 is distributed with a certain quantity of glue, and finally the overflow glue is formed on the tire, when the ratio C is in the condition of (1.20-1.60), the intermittent overflow glue is not needed, the automatic overflow glue is removed by the manual overflow glue removing mode is not needed, the die is not needed, the overflow glue is removed, and the overflow glue can be removed by the repair by the manual repair mode, and the repair cost is not needed due to the manual overflow glue, and the repair mode.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a radial tire mould, includes decorative pattern mould (1), mould die joint face (11), overflow groove (12), guiding hole (13), goes up bead mould (2), goes up bead mould die joint face (21), lower bead mould (3) and lower bead mould die joint face (31), its characterized in that: the tire mold is provided with a glue overflow groove (12), the glue overflow groove (12) is arranged in a whole circle along a mold parting surface (11), the mold parting surface (11) is simultaneously provided with a diversion hole (13), and the diversion hole (13) is communicated with the glue overflow groove (12).

2. A radial tire mold according to claim 1, wherein: the axial length of the diversion hole (13) is 2mm-4mm, the radial depth of the diversion hole (13) is 0.6mm-1.0mm, and meanwhile, the circumferential width of the diversion hole (13) is 1mm-3mm.

3. A radial tire mold according to claim 1, wherein: the diversion holes (13) are uniformly distributed on the parting surface (11) of the die in the circumferential direction, are arranged according to the tread pattern pitch number, and one to three diversion holes (13) are arranged on average according to each pattern pitch number.

4. A radial tire mold according to claim 1, wherein: the glue overflow groove (12) is arranged on the parting surface (11) of the die in a circle along the circumferential direction, the axial width of the glue overflow groove (12) is set to be 4mm-10mm, and the radial depth is set to be 0.5mm-2.0mm.