阅读说明：本技术 一种微细气孔模具加工方法及微细气孔模具 (Micro-pore mold processing method and micro-pore mold ) 是由 王�锋 刘晓飞 蒋宗明 于 2021-01-18 设计创作，主要内容包括：本发明为一种微细气孔模具加工方法,本发明属于轮胎模具技术领域,包括：步骤一、确定轮胎模具的微细气孔开孔位置；步骤二、根据微细气孔的开孔位置在轮胎模具背面相应位置加工工艺孔；步骤三、在工艺孔底部的微细气孔开孔位置加工出与轮胎模具内部连通的通气孔。本发明的有益效果：能够有效避免现有微细气孔模具在加工中钻头折断,进而堵塞微细气孔的现象发生,提高微细气孔模具的加工质量。另外,利用本发明的微细气孔模具加工方法加工出的微细气孔模具有较好的强度和刚度,能够保证在轮胎硫化中不会发生形变,同时便于轮胎模具中气体的排出,保证轮胎硫化质量。(The invention relates to a method for processing a micro-pore mold, which belongs to the technical field of tire molds and comprises the following steps: step one, determining the position of a micro air hole opening of a tire mold; step two, processing a fabrication hole at a corresponding position on the back of the tire mold according to the opening position of the micro air hole; and step three, processing a vent hole communicated with the interior of the tire mold at the hole opening position of the micro air hole at the bottom of the process hole. The invention has the beneficial effects that: the drill bit can be effectively prevented from being broken in the machining process of the existing micro-pore mould, so that the micro-pore is blocked, and the machining quality of the micro-pore mould is improved. In addition, the micro-pore mould processed by the processing method of the micro-pore mould has better strength and rigidity, can ensure that the micro-pore mould does not deform during tyre vulcanization, is convenient for discharging gas in the tyre mould, and ensures the tyre vulcanization quality.)

1. A method for processing a micro-pore mold is characterized by comprising the following steps:

step one, determining the position of a micro air hole opening of a tire mold;

step two, processing a fabrication hole at a corresponding position on the back of the tire mold according to the opening position of the micro air hole;

processing a vent hole communicated with the interior of the tire mold at the opening position of the micro air hole at the bottom of the process hole;

the aperture of the process hole is larger than that of the vent hole; the maximum depth of the fabrication hole is smaller than the wall thickness of the tire mold.

2. The method for processing a fine pore mold according to claim 1, further comprising the following steps between the second step and the third step:

step a, cleaning the inner part of the process hole and keeping the process hole clean.

3. The method for machining a micro-porous mold according to claim 1, wherein the method for machining the fabrication hole in the second step is drilling.

4. The method for machining a micro-porous mold according to claim 1, wherein the method for machining the vent hole in the third step is drilling.

5. The method for processing a mold with micro-pores as claimed in claim 1, wherein the size of the pore diameter of the vent hole in the third step is 0.4-2.5 mm.

6. The method for processing a mold with micro air holes as claimed in claim 1, wherein the distance between the bottom of the process hole and the inner wall of the tire mold in the second step is not less than 5 mm.

7. The method for processing the mold with the micro air holes as claimed in claim 1, wherein the dimension of the bottom of the process hole in the second step from the inner wall of the tire mold is 5-15 mm; the processing method of the vent hole in the third step is to utilize laser cutting equipment to carry out laser cutting processing; the cutting head of the laser cutting equipment can extend into the technical hole to carry out laser cutting.

8. A fine pore mold, characterized in that the fine pore mold is processed by the processing method according to any one of claims 1 to 7.

Technical Field

The invention belongs to the technical field of tire molds, and particularly relates to a micro-pore mold processing method and a micro-pore mold.

Background

In the tire vulcanization process, in order to release air in a tire mold cavity so as to uniformly distribute rubber in the mold, a plurality of tire mold air holes are formed in the tire mold of the conventional tire mold, and the tire mold is also called as micro air holes due to small diameter.

The existing method of manual hand drilling or drilling by a drilling machine is generally adopted for machining the micro air holes of the tire mold, and as the diameter and the depth of the micro air holes of the tire mold are small, a drill bit for machining the micro air holes is thin and long, the drill bit is easy to break in the machining process, and the broken drill bit cannot be taken out of the tire mold, so that the quality of tire machining is influenced.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a method for processing a micro-pore mold, which can effectively solve the problems, effectively avoid the situation that a drill bit is broken and blocks the micro-pores in the process of processing the tire mold and ensure the processing quality of the micro-pores of the tire mold.

A micro-pore mold processing method comprises the following steps:

step one, determining the position of a micro air hole opening of a tire mold;

step two, processing a fabrication hole at a corresponding position on the back of the tire mold according to the opening position of the micro air hole;

processing a vent hole communicated with the interior of the tire mold at the opening position of the micro air hole at the bottom of the process hole;

the aperture of the process hole is larger than that of the vent hole; the maximum depth of the fabrication hole is smaller than the wall thickness of the tire mold.

Preferably, the method further comprises the following steps between the second step and the third step:

step a, cleaning the inner part of the process hole and keeping the process hole clean.

Preferably, the processing method of the fabrication hole in the second step is drilling processing.

Preferably, the method for machining the vent hole in the third step is drilling.

Preferably, the aperture size range of the vent hole in the third step is 0.4-2.5 mm.

Preferably, the distance between the bottom of the process hole and the inner wall of the tire mold in the second step is not less than 5 mm.

Preferably, the size range of the distance between the bottom of the process hole and the inner wall of the tire mold in the second step is 5-15 mm; the processing method of the vent hole in the third step is to utilize laser cutting equipment to carry out laser cutting processing; the cutting head of the laser cutting equipment can extend into the technical hole to carry out laser cutting.

A fine pore mold, which is processed by any one of the processing methods; the micro-pore mould comprises a fabrication hole and a vent hole.

Has the advantages that: a machining method for a micro-pore mold comprises the steps of machining a fabrication hole by using a large drill bit, machining an air vent, effectively avoiding the phenomenon that the drill bit is broken during machining of the conventional tire mold so as to block the micro-pores, and improving the machining quality of the micro-pore mold. In addition, the tire mold processed by the method for processing the micro-porous mold has better strength and rigidity, can ensure that the tire mold cannot deform in the tire vulcanization process, is convenient for the discharge of gas in the tire mold, and ensures the tire vulcanization quality.

Drawings

FIG. 1 is a schematic cross-sectional view of a tire according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view taken at location A-A of FIG. 1;

fig. 3 is a partially enlarged view of a portion B in fig. 2.

In the figure, 1, a tire mold; 2. pattern pieces; 3. fine pores; 31. a fabrication hole; 32. and (4) a vent hole.

Detailed Description

The invention will be further described with reference to the accompanying drawings, which are provided for illustration of specific embodiments of the invention only and are not to be construed as limiting the invention in any way, the specific embodiments being as follows:

a micro-pore mold processing method comprises the following steps:

the method comprises the following steps: and determining the opening position of the micro air holes of the tire mold according to the requirements of the tire vulcanization process. The fine pores are generally located close to the pattern piece in the tire mold, and the specific location is determined by the factors such as the pattern shape and the size of the tire and the specific manufacturing process of the tire.

Step two: and processing a process hole at the corresponding position of the back of the tire mold by using a drilling process according to the hole opening position of the micro-fine pore. The maximum depth of the fabrication hole is less than the wall thickness of the tire mold. Specifically, the distance between the bottom of the fabrication hole and the inner wall of the tire mold is not less than 5 mm. The large drill bit is utilized to process the process hole, the advantage that the large drill bit has high rigidity can be utilized, and the drill bit is effectively prevented from being broken. The fabrication hole is cylindrical, has small influence on the strength of the tire mold, and cannot influence the use of the tire mold. The distance between the bottom of the fabrication hole and the inner wall of the tire mold is not less than 5mm, so that the tire mold can be effectively ensured to have enough strength, the pressure resistance is ensured, the tire mold is prevented from being deformed and damaged by pressure in the tire vulcanization process, and the quality of a vulcanized tire finished product is further ensured.

Step three: the inner part of the fabrication hole is cleaned, the fabrication hole is kept clean, the influence of impurities such as metal chips on the subsequent processing technology can be reduced, the convenience of the subsequent processing is improved, and the processing precision of micro pores is improved.

Step four: processing air holes communicated with the inside of the tire mold at the micro air hole opening positions at the bottoms of the process holes, wherein the aperture size range of the air holes is 0.4-2.5 mm, in the size range, air in the tire mold can be effectively discharged, the overflow of tire rubber materials is less, the quality of the tire is guaranteed, and the waste of the rubber materials is reduced.

Specifically, before the vent hole is machined, a process hole is machined in a drilling machining mode, then the vent hole is machined by laser cutting equipment, and the laser cutting equipment adopts an existing conventional laser cutting machine with a conventional model. The aperture of the fabrication hole has certain size requirement, so that when laser cutting equipment is used for carrying out laser cutting on the bottom of the fabrication hole, the cutting head of the laser equipment can stretch into the fabrication hole for carrying out laser cutting, and the wall of the fabrication hole can not interfere with the cutting head of the laser cutting equipment. In addition, the drill bit diameter that the fabrication hole that is big enough used when the drilling is add is bigger, avoids the drill bit rupture more effectively. In addition, the distance between the bottom of the fabrication hole and the inner wall of the tire mold is within 5-15 mm, so that the distance between the bottom of the fabrication hole and the inner wall of the tire mold is within the effective cutting depth of the laser cutting equipment. Because the laser cutting equipment needs higher power and the cutting head size is larger for the thicker tire mold, the required aperture of the fabrication hole is too large after the distance from the bottom of the fabrication hole to the inner wall of the tire mold exceeds 15mm, and the strength of the tire mold is suddenly reduced, so the distance from the bottom of the fabrication hole to the inner wall of the tire mold needs to be smaller than 15 mm. The air vent is processed by utilizing a laser cutting mode of laser cutting equipment, a drill bit is not needed, the tiny air holes of the tire mold can be prevented from being blocked due to the breakage of the drill bit, and the processing quality of the tiny air holes of the tire mold is ensured.

In some embodiments, after the fabrication hole is drilled, the drilling or other machining methods may be further used to perform the air hole machining. After the fabrication hole is processed, the thickness of the bottom of the fabrication hole from the inner wall of the tire mold is smaller than the original wall thickness of the tire mold, the length of a drill bit required for processing the vent hole is reduced, the rigidity of the drill bit is relatively increased under the condition of the same aperture, the stress of the drill bit is reduced in a double way in the drilling process, and the condition that the vent hole is broken in the processing process can be effectively avoided.

In some embodiments, the fabrication hole can also be drilled several times on the back of the tire mold by a large-to-small drill bit, the aperture of the fabrication hole is small from large, the aperture of the fabrication hole adjacent to the vent hole is smallest, but the smallest aperture of the fabrication hole is larger than the aperture of the vent hole. A series of process holes from large to small can be formed by drilling the tire mold for many times, so that the phenomenon that a drill bit is broken in the micro air hole machining process in the prior art is effectively avoided, and meanwhile, the strength of the tire mold can be further enhanced.

As shown in fig. 1 and referring to fig. 2 and 3, a micro-pore mold is processed by the processing method of any one of the above embodiments, and includes a tire mold 1, a pattern sheet 2, and micro-pores 3. The pattern pieces 2 are provided on the sidewall of the tire mold 1. The micro air holes 3 are arranged on the inner wall of the tire mold 1 at corresponding positions close to the pattern pieces 2 and penetrate through the sidewall of the tire mold 1 to be communicated with the tire mold 1. The micro air holes 3 are of a boss type cavity structure and comprise fabrication holes 31 and vent holes 32 which are communicated with each other, the aperture of each fabrication hole 31 is larger than that of each vent hole 32, the fabrication holes 31 are communicated with the outer side wall of the tire mold 1, and the vent holes 32 are communicated with the inner side wall of the tire mold 1. The tiny air holes 3 of the boss type cavity structure can ensure that the tire mold has enough strength and rigidity, and the normal running of the tire vulcanization process is ensured, and meanwhile, the tiny air holes 3 of the boss type cavity structure can more conveniently clear away rubber materials in the tiny air holes 3 from the back surface of the tire mold.

Thus, it should be understood by those skilled in the art that while exemplary embodiments of the present invention have been illustrated and described in detail herein, many other variations or modifications which are consistent with the principles of the invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.