CN217319395U

CN217319395U - Vulcanization device for collecting pressure at fixed point in tire vulcanization process, tire design equipment and system

Info

Publication number: CN217319395U
Application number: CN202121258710.6U
Authority: CN
Inventors: 侯丹丹; 王先宁; 王建兵; 刘鹏; 曹京欧; 张明; 张春生
Original assignee: Zhongce Rubber Group Co Ltd
Current assignee: Zhongce Rubber Group Co Ltd
Priority date: 2021-06-07
Filing date: 2021-06-07
Publication date: 2022-08-30
Anticipated expiration: 2031-06-07

Abstract

The application relates to the field of intelligent tire manufacturing, in particular to a vulcanization device for fixed-point pressure acquisition in a tire vulcanization process and intelligent tire design equipment. A vulcanizing device for collecting pressure at fixed points in the tire vulcanizing process comprises a vulcanizing mold, wherein a through hole is formed in the vulcanizing mold, a pressure sensor is arranged in the through hole, and a pressure sensitive element of the pressure sensor is arranged corresponding to each part of a tire; each part of the tire comprises 1 or more of the following parts: firstly, the material of the crown part of the finished tire is at the inflection point of the thickness change from thin to thick and the thickness change from thick to thin; when the finished tire is used, the maximum deflection of the tire side is achieved; and splicing parts of the mould during assembly. The device installs pressure sensor at the different positions of vulcanization mould utensil, reflects the pressure that the mould received through pressure sensor to reach the purpose of monitoring tire atress.

Description

Vulcanization device for collecting pressure at fixed point in tire vulcanization process, tire design equipment and system

Technical Field

The application relates to the field of intelligent tire manufacturing, in particular to a vulcanizing device for acquiring pressure at fixed points in a tire vulcanizing process and intelligent tire designing equipment.

Background

At present, from the aspect of development of national and industrial strategies, or from the aspect of survival and development of the tire industry, as the traditional industry with three intensive types of labor, capital and resources, the tire industry urgently needs to carry out intelligent upgrading and modification, and the tire product with high technical content, high added value and high quality is vigorously researched and developed, so that the production efficiency is improved, the enterprise benefit is increased, the core competitiveness is promoted, and an intelligent manufacturing mode is imperative.

Under the competitive situation of large shuffling in the tire industry, intelligent manufacturing is not simply integrated with a stack of computers, robots and mechanical arms, but is the innovation of enterprises driving research and development investment, automation, informatization, intelligent production efficiency, investment in environmental protection, and iterative updating of core elements such as distribution of marketing modes, after-sale service tracking and the like. The internet information technology is deeply integrated with the tire manufacturing industry, the production elements are digitalized and networked, the knowledge in the production process is automatic, the production process is driven by the knowledge, and the aims of simplifying management, improving quality, reducing cost and improving efficiency and protecting environment are fulfilled. The case shows that after the production line is intelligentized, the production time of the whole process flow is shortened by nearly one third compared with the production time of the traditional production mode, the production efficiency is obviously improved, the labor scale is greatly simplified, and the per-capita yield value and the industrial added value are doubled.

The intelligent manufacturing of the tire not only comprises intelligent tire and intelligent production of the tire, but also comprises intelligent design of the tire, and materials of all parts of a finished tire are distributed differently according to use and design requirements in the design process of the tire, but the vulcanization pressure of all parts of the tire adopts the same parameter in the actual production of the tire. The properties of the rubber compound of the finished tire vulcanized by different materials distributed under the same vulcanization pressure condition are different inevitably.

The influence of vulcanization pressure on the peeling strength of rubber/metal hot vulcanization bonding is researched by Roc, Suzhengtao, Lieqing and the like [ J ]. the report of aeronautical materials, 2016,1(36):69-74 shows that the vulcanization pressure has a great influence on the mechanical property of the rubber. As the vulcanization pressure changes, the tear strength of the compound also changes. The analysis reason is as follows: with the change of the vulcanization pressure, the molecular chain distance and the crosslinking density of the rubber are changed. That is, the average distance between the macromolecular chains of the rubber is changed to cause the change of single-sulfur bonds and double-sulfur bonds, and the change of the multiple-sulfur bonds is reversed, so that the tearing strength of the vulcanized rubber is finally changed.

Under the condition of consistent vulcanization time and temperature, in order to ensure consistent mechanical properties such as tearing strength and the like of rubber materials at each part of the tire after vulcanization, corresponding fixed-point vulcanization pressure is formulated according to the thickness of the rubber materials at each part. In order to realize the scheme, the vulcanization pressure of each part must be monitored in real time; the data obtained by further detection can be processed by a computer, and the tire design result is simulated by establishing the relation between the pressure data and each part of the tire, including materials, size parameters and vulcanization process parameters, so as to achieve the optimization of the tire performance. At present, no fixed-point testing equipment specially aiming at the pressure of each part of the tire exists in the market.

Disclosure of Invention

In order to solve the technical problem, the application aims to provide the vulcanizing device for collecting the pressure at a fixed point in the tire vulcanizing process.

In order to achieve the above object, the present application adopts the following technical solutions:

a vulcanizing device for collecting pressure at fixed points in the tire vulcanizing process comprises a vulcanizing mold, wherein a through hole is formed in the vulcanizing mold, a pressure sensor is arranged in the through hole, and a pressure sensitive element of the pressure sensor is arranged corresponding to each part of a tire; each part of the tire comprises 1 or more of the following parts:

firstly, the crown part of the finished tire is at the inflection point of the thickness change from thin to thick and from thick to thin;

when the finished tire is used, the maximum deflection of the tire side is achieved;

and splicing parts of the mould during assembly.

Preferably, the end face of the pressure sensitive element contacting with each part of the tire is a cambered surface or a plane surface.

Preferably, each of said tyre portions comprises 1 or 2 or 3 or 4 of the crown portion, shoulder portion, sidewall portion and toe portion; the crown portion comprises 1 or 2 or 3 of the tread portion, the pattern top and the pattern root; the sidewall portion includes 1 or 2 of the maximum section width near the parting surface portion.

Preferably, the crown portion comprises a tread portion, a pattern top, a left pattern root and a right pattern root; the tread part is provided with a pressure sensor, and the top of the pattern, the left pattern root and the right pattern root are respectively provided with a pressure sensor.

Preferably, the pressure sensors provided at the pattern top, the left pattern root and the right pattern root are located on the three cross sections, respectively.

Preferably, the pressure sensors at the pattern top are arranged through the pattern module, and the end faces of the pressure sensors at the left and right pattern roots are located on both sides of the pattern module.

Preferably, one pressure sensor is arranged on the tread portion, and two pressure sensors are arranged on the shoulder portions and are respectively positioned on the shoulder portions on two sides of the mold; the pressure sensors of the tread part and the tire shoulder part are positioned on the same cross section.

Preferably, the pressure sensor of the tread portion is displaced to one side to avoid a pattern in the middle of the tread; the pressure sensors on the shoulder of the tire displace towards the two sides respectively.

Preferably, two pressure sensors are arranged close to the parting face part, the maximum section wide part and the toe mouth part, and the two pressure sensors at the same part are respectively positioned at two sides of the mold; and the pressure sensors near the parting face portion, the maximum section wide portion, and the toe portion are located on the same section.

Further, the application also discloses equipment for optimally designing the tire, which comprises the vulcanizing device, a data transmission unit connected with the pressure sensor, a data receiving memory connected with the data transmission unit and a processor; the processor processes pressure data acquired by the pressure sensor; and by establishing the relationship between the pressure data and each part of the tire, including materials, dimensional parameters and vulcanization process parameters, the design result of the tire is simulated so as to optimize the performance of the tire.

A system for optimizing and designing tires based on big data is characterized by comprising a vulcanizing device, a data transmission unit connected with a pressure sensor, a data receiving memory connected with the data transmission unit and a big data processing center; the big data processing center processes the pressure data acquired by the pressure sensor; and the relation between the pressure data and each part of the tire, including materials, size parameters and vulcanization process parameters, is established, so that the design result of the tire is simulated, and the optimization of the performance of the tire is achieved.

The test principle of the application is as follows: the tire vulcanization process is mainly divided into a stamping stage, a positive vulcanization pressure maintaining stage and a cooling pressure reduction stage. In the stamping stage, a pump machine injects pressure into the bladder of the inner cavity of the tire, and the pressure is transmitted to the tire so that the tire rubber is tightly attached to the inner surface of the mold. The shape of the outer surface of the tire blank is not completely matched with the shape of the inner surface of the mold, so that the tire rubber material can flow in the stamping stage, and the pressure conditions of different parts are different. In the positive vulcanization pressure maintaining stage, the pressure applied to the tire is basically kept unchanged, but the pressure is slightly changed due to the structural characteristics of the pump, so that the pressure applied to the tire is also fluctuated. In the cooling pressure relief stage, because the rubber is an elastic material, different parts of the tire are pressed differently in the pressure relief process. The pressure of the rubber material at each part of the tire cannot be directly measured, but the pressure F applied to the tire and the pressure F' applied to the mold are the relationship between the action force and the reaction force, and the two forces are equal in magnitude and opposite in direction. The pressure of the tyre can therefore be characterized by the pressure to which the mould is subjected. Therefore, the pressure sensing devices are installed at different positions of the mold, and the pressure received by the mold is reflected through the pressure sensing devices, so that the purpose of monitoring the stress of the tire is achieved. The green tyre transmits the pressure to the inner surface of the mould, so that the inner surface of the mould is pressed, and the pressure is equal to the pressure to which the green tyre is subjected. In order to avoid mutual interference among the sensors, between the sensors and the exhaust holes and between the sensors and the movable character blocks, all the sensors need to be circumferentially staggered and avoid the exhaust holes and the movable character blocks.

According to the technical scheme, the pressure sensors are arranged at different positions of the vulcanization mold, and the pressure applied to the mold is reflected through the pressure sensors, so that the purpose of monitoring the stress of the tire is achieved. Further, the tire performance optimization can be achieved by processing the pressure data obtained by the testing method and further simulating the tire design result by establishing the relationship between the pressure data and the tire parts including the material, the dimension parameter and the vulcanization process parameter.

Drawings

Fig. 1 is a schematic cross-sectional view of a finished tire.

FIG. 2 is a schematic structural view of the vulcanizing device of the present application.

Fig. 3 is an enlarged view of a portion a in fig. 1.

Fig. 4 is an enlarged view of a portion B in fig. 1.

Detailed Description

The following detailed description of embodiments of the present application refers to the accompanying drawings.

The device comprises a vulcanization mold, wherein a through hole is formed in the vulcanization mold, a pressure sensor is arranged in the through hole, a pressure sensitive element of the pressure sensor is arranged corresponding to each part of the tire, and the end surface of the pressure sensitive element of the pressure sensor, which is in contact with each part of the tire, is a cambered surface or a plane. As shown in fig. 1, each portion of the tire includes a crown portion 1, shoulder portions 2, side wall portions 3, and toe portions 4.

As shown in fig. 2, the crown portion 1 includes a tread portion 11, a pattern top 12, a left pattern root 13, and a right pattern root 14; a pressure sensor is provided in the tread portion 11, and a pressure sensor is provided in each of the pattern top 12, the left pattern root 13, and the right pattern root 14. The pressure sensors provided at the pattern top 12, the left pattern root 13 and the right pattern root 14 are located on the three sections, respectively. One pressure sensor is arranged on the tread portion 11, and two pressure sensors are arranged on the tire shoulder portions 2 and are respectively positioned on the tire shoulder portions 2 on two sides of the mold; the pressure sensors of the tread portion 11 and the shoulder portion 2 are located on the same cross section. The pressure sensor of the tread part 11 is displaced to one side to avoid the pattern in the middle of the tread; the pressure sensors of the tire shoulder portions 2 are displaced toward both sides, respectively. The sidewall part 3 comprises a parting surface part 15 and a maximum section wide part 16, two pressure sensors are arranged near the parting surface part 15, the maximum section wide part 16 and the toe part 4, and the two pressure sensors at the same position are respectively positioned at two sides of the mold; and the pressure sensors near the parting face portion 15, the maximum section wide portion 16, and the toe portion 4 are located on the same section.

The effects of the present application will be described below by taking an example in which a 12.00R20 standard all-steel radial tire is subjected to data collection and analysis to calculate the cohesive failure force at each part.

Example 1

The test analysis was performed using the test method described in the present application, taking the 12.00R20 specification as an example. The vulcanization pressure is 2.5MPa, the vulcanization temperature is 170 ℃, the vulcanization time is 50min, data acquisition and analysis are carried out, and the bonding destructive power of each part is calculated.

Example 2

The test method described in the present application is used to perform test analysis, taking the specification of 12.00R20 as an example. The vulcanization pressure is 2.0MPa, the vulcanization temperature is 170 ℃, the vulcanization time is 50min, data acquisition and analysis are carried out, and the bonding destructive power of each part is calculated.

Example 3

The test analysis was performed using the test method described in the present application, taking the 12.00R20 specification as an example. The vulcanization pressure is 1.5MPa, the vulcanization temperature is 170 ℃, the vulcanization time is 50min, data acquisition and analysis are carried out, and the bonding destructive power of each part is calculated.

Example 4

The test method described in the present application is used to perform test analysis, taking the specification of 12.00R20 as an example. The vulcanization pressure is 1.0MPa, the vulcanization temperature is 170 ℃, the vulcanization time is 50min, data acquisition and analysis are carried out, and the adhesive destructive power of each part is calculated.

Through comparative analysis of the example data, the adhesive breaking force of the rubber material at each part of the tire in the example 1 is the largest and the tear resistance of the rubber material is the strongest under the condition that the vulcanization temperature and the vulcanization time are the same, and the fitting equation is met.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present disclosure, including any and all examples described herein. Various modifications to these embodiments will be readily apparent to those skilled in the art. The general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A vulcanizing device for collecting pressure at a fixed point in the tire vulcanizing process is characterized by comprising a vulcanizing mold, wherein a through hole is formed in the vulcanizing mold, a pressure sensor is arranged in the through hole, and a pressure sensitive element of the pressure sensor is arranged corresponding to each part of a tire; each part of the tire comprises 1 or more of the following parts:

firstly, the material of the crown part of the finished tire is at the inflection point of the thickness change from thin to thick and the thickness change from thick to thin;

and thirdly, splicing parts of the mould during assembly.

2. The vulcanizing device for collecting pressure at a fixed point in the tire vulcanizing process according to claim 1, wherein the end surfaces of the pressure sensitive element contacting with each part of the tire are cambered surfaces or flat surfaces.

3. The apparatus of claim 1, wherein the tire comprises 1 or 2 or 3 or 4 of the crown portion, shoulder portion, sidewall portion and toe portion; the crown portion comprises 1 or 2 or 3 of the tread portion, the pattern top and the pattern root; the sidewall portion includes 1 or 2 of the maximum cross-sectional width portion near the parting face portion.

4. The vulcanizing device for collecting pressure at a fixed point in the tire vulcanizing process according to claim 3, wherein the tire crown part comprises a tread part, a pattern top part, a left pattern root part and a right pattern root part; the tread part is provided with a pressure sensor, and the top of the pattern, the left pattern root and the right pattern root are respectively provided with a pressure sensor; preferably, the pressure sensors arranged at the pattern top, the left pattern root and the right pattern root are respectively positioned on the three cross sections.

5. The tire vulcanizing device for collecting pressure at fixed points in the tire vulcanizing process as claimed in claim 4, wherein the pressure sensors at the tops of the patterns are arranged through the pattern blocks, and the end surfaces of the pressure sensors at the roots of the left pattern and the roots of the right pattern are positioned at both sides of the pattern blocks.

6. The vulcanizing device for collecting pressure at a fixed point in the tire vulcanizing process according to claim 3, wherein one pressure sensor is arranged on the tread portion, and two pressure sensors are arranged on the shoulder portions and are respectively positioned on the shoulder portions on two sides of the mold; the pressure sensors of the tread part and the tire shoulder part are positioned on the same cross section.

7. The vulcanizing device for collecting the pressure at the fixed point in the tire vulcanizing process according to claim 6, wherein the pressure sensor of the tread portion is displaced to one side to avoid the pattern in the middle of the tread; the pressure sensors on the shoulder of the tire displace towards the two sides respectively.

8. The vulcanizing device for collecting pressure at a fixed point in the tire vulcanizing process according to claim 3, wherein two pressure sensors are arranged near the parting surface part, the maximum section wide part and the toe opening part, and the two pressure sensors at the same position are respectively arranged at two sides of the mold; and the pressure sensors near the parting face portion, the maximum section wide portion, and the toe portion are located on the same section.

9. A tyre design kit, characterized in that it comprises a vulcanisation apparatus according to any one of claims 1 to 8, a data transmission unit connected to said pressure sensor and a data receiving memory connected to the data transmission unit and a processor.

10. A system, characterized in that it comprises a vulcanisation apparatus according to any of claims 1 to 8, a data transmission unit connected to said pressure sensors and a data receiving memory connected to the data transmission unit, and a big data processing centre.