CN114425842B - Extrusion process in production of automobile radial tire - Google Patents
Extrusion process in production of automobile radial tire Download PDFInfo
- Publication number
- CN114425842B CN114425842B CN202111508020.6A CN202111508020A CN114425842B CN 114425842 B CN114425842 B CN 114425842B CN 202111508020 A CN202111508020 A CN 202111508020A CN 114425842 B CN114425842 B CN 114425842B
- Authority
- CN
- China
- Prior art keywords
- extrusion
- mold
- tire
- section
- extrusion process
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2030/00—Pneumatic or solid tyres or parts thereof
- B29L2030/002—Treads
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Tyre Moulding (AREA)
Abstract
The invention provides an extrusion process in the production of radial tires of automobiles, which comprises the following steps: s10, performing rheological behavior test on the tire molten rubber material under a constant temperature state, selecting the optimal extrusion temperature of the tire molten rubber material, and maintaining the optimal extrusion temperature to perform the extrusion process of tire preparation; s20, establishing a tire tread extrusion molding model according to the external dimension and the fluid volume of the extrusion die; s30, correcting the shape of the extrusion neck ring mold according to the model in the step S20, and selecting a reasonable shape of the extrusion neck ring mold; and S40, extruding and injecting the tire molten rubber material into a tire mold by adopting the extrusion die obtained in the step S30 to finish the extrusion process for preparing the tire. The extrusion process in the production of the radial tire of the automobile ensures the effective operation of the extrusion process through the reasonable shape parameters of the extrusion opening mold.
Description
Technical Field
The invention relates to the technical field of automobile tire production, in particular to an extrusion process in the production of automobile radial tires.
Background
Extrusion is one of the basic forming processes for polymeric materials. In the tire industry, some semi-finished components of radial tires, such as treads, are formed by extrusion.
The existing tire extrusion processes, due to the presence of fluid elasticity, cause significant swelling of the tire compound after it exits the extrusion die, which causes the extrudate to have a cross-sectional shape that is different from the cross-sectional shape at the exit of the die, thus increasing the difficulty of designing the tire mold and controlling the process.
Disclosure of Invention
The invention aims to provide an extrusion process in the production of an automobile radial tire to solve the problems.
In order to achieve the purpose, the invention provides the following technical scheme: an extrusion process in the production of radial tires for automobiles comprises the following steps:
s10, performing rheological behavior test on the tire molten rubber material under a constant temperature state, selecting the optimal extrusion temperature of the tire molten rubber material, and maintaining the optimal extrusion temperature to perform the extrusion process of tire preparation;
s20, establishing a tire tread extrusion molding model according to the external dimension and the fluid volume of the extrusion die;
s30, correcting the shape of the extrusion neck ring mold according to the model in the step S20, and selecting a reasonable shape of the extrusion neck ring mold;
and S40, extruding and injecting the tire molten rubber material into a tire mold by using the extrusion die obtained in the step S30 to finish the extrusion process for preparing the tire.
As an improvement of the present invention, in step S10, a rotor-free dynamic shear rheometer is adopted to perform rheological behavior test on the tire molten rubber, the tire molten rubber is placed in a sealed and constant-temperature biconical mold cavity, a lower mold half of the biconical mold cavity is driven by a motor to perform torsional vibration at a preset frequency and a preset tilt angle to ensure that the tire molten rubber can generate torsional strain, and a torque sensor arranged on an upper mold half of the biconical mold cavity monitors received torque in real time.
As a modification of the present invention, in step S20, the extrusion of the fluid is simulated by using an interface tracing method.
As a modification of the present invention, in step S30, the shape parameters of the extrusion die include a length and a sectional area.
As an improvement of the invention, the extrusion port die is divided into a fluid extrusion section connected with the extrusion gun, a port die constant section, a port die expanding section and a pre-port die section connected with the tire die along the fluid flowing direction, and the shape parameters of the extrusion port die comprise the length and the sectional area of the fluid extrusion section, the length and the sectional area of the port die constant section, the length and the sectional area of the port die expanding section and the length and the sectional area of the pre-port die section.
As an improvement of the invention, the length of the fluid extrusion section, the constant section of the neck ring mold, the diameter expansion section of the neck ring mold, the length of the pre-neck ring mold section, the sectional area of the constant section of the neck ring mold, the diameter-changing curve of the diameter expansion section of the neck ring mold and the diameter-changing curve of the pre-neck ring mold section are changed one by an orthogonal test method, thereby selecting a reasonable shape of the extrusion die.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Detailed description of the preferred embodiments
The following description of the preferred embodiments of the present invention is provided for the purpose of illustration and description, and is in no way intended to limit the invention.
An extrusion process in the production of radial tires for automobiles comprises the following steps:
s10, performing rheological behavior test on the tire molten rubber material under a constant temperature state, selecting the optimal extrusion temperature of the tire molten rubber material, and maintaining the optimal extrusion temperature to perform the extrusion process of tire preparation;
s20, establishing a tire tread extrusion molding model according to the external dimension of the extrusion die and the fluid volume;
s30, correcting the shape of the extrusion neck ring mold according to the model in the step S20, and selecting a reasonable shape of the extrusion neck ring mold;
and S40, extruding and injecting the tire molten rubber material into a tire mold by adopting the extrusion die obtained in the step S30 to finish the extrusion process for preparing the tire.
As an embodiment of the present invention, in step S10, a rotor-free dynamic shear rheometer is used to perform rheological behavior test on the tire molten rubber, the tire molten rubber is placed in a sealed and constant-temperature biconical mold cavity, a lower mold half of the biconical mold cavity is driven by a motor to perform torsional vibration at a preset frequency and a preset tilt angle to ensure that the tire molten rubber can generate torsional strain, and a torque sensor disposed on an upper mold half of the biconical mold cavity monitors a received torque in real time.
As an embodiment of the present invention, in step S20, the extrusion of the fluid is simulated by using an interface tracing method.
As an embodiment of the present invention, in step S30, the shape parameters of the extrusion die include a length and a sectional area.
As an embodiment of the invention, the extrusion mouth mold is divided into a fluid extrusion section connected with the extrusion gun, a mouth mold constant section, a mouth mold expanding section and a pre-mouth mold section connected with the tire mold along the fluid flowing direction, and the shape parameters of the extrusion mouth mold comprise the length and the sectional area of the fluid extrusion section, the length and the sectional area of the mouth mold constant section, the length and the sectional area of the mouth mold expanding section and the length and the sectional area of the pre-mouth mold section.
As an embodiment of the invention, the fluid extrusion section, the mouth mold constant section, the mouth mold expanding section, the length of the pre-mouth mold section, the sectional area of the mouth mold constant section, the reducing curve of the mouth mold expanding section and the reducing curve of the pre-mouth mold section are changed one by an orthogonal test method, so that the reasonable shape of the extrusion mouth mold is selected.
The working principle and the beneficial effects of the technical scheme are as follows:
and (3) performing steady-state and dynamic rheology tests on the tire rubber by using a dynamic shear rheometer, and investigating the change relationship among the shear viscosity, the shear rate, the oscillation frequency, the shear strain and the temperature of the rubber. The dynamic shear rheometer is used for carrying out vulcanization test, frequency scanning test and strain scanning test on the rubber material. The result of the vulcanization test shows that for the rubber compound containing a vulcanization system, the test time of a single sample in frequency scanning and strain scanning is controlled within 20min, so that the influence of the vulcanization process on the test result is prevented. The results show that the complex viscosity of the compound decreases with increasing test frequency, is typical of shear-thinning fluids, but does not have a pronounced Newtonian viscosity plateau at low frequencies. Comparing the complex viscosity curves at different test temperatures, it can be seen that when the test temperature is increased from 80 ℃ to 100 ℃, the viscosity of the compound is reduced, but the viscosity difference caused by temperature change is smaller and smaller with further increase of the temperature.
A finite element model of single extrusion molding of the tire tread is established by using a VOF method. The VOF (Volume of Fluid) method is an interface tracking method established under an Euler grid. The VOF method can objectively describe the whole process of extrusion swelling of the sizing material and take account of the influence of the traction of the conveyor belt on the cross-sectional shape of the extrudate. The behavior of the polymer on the extrusion swelling causes the section shape of the extruded product to be obviously different from the section shape at the outlet of the neck ring mold, thereby increasing the difficulty of neck ring mold design.
And processing the die designed by correction into a real object by using a numerical control machine tool, and installing the real object on an extruder to perform an extrusion test. At high volumetric flow rates, the cross-sectional shape of the extrudate is independent of the extrusion speed. Comparing the profile of the extrudate obtained by the test with the target profile in the numerical correction design, the actual wheel numbness of the extrudate is smaller than the target profile. Therefore, in the numerical correction design of the die, reasonable parameters must be selected to obtain the accurate die shape.
The extrusion process in the production of the radial tire of the automobile ensures the effective operation of the extrusion process through the reasonable shape parameters of the extrusion die.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some technical features, and any modifications, equivalents, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. An extrusion process in the production of radial tires for automobiles is characterized by comprising the following steps:
s10, performing rheological behavior test on the tire molten rubber material under a constant temperature state, selecting the optimal extrusion temperature of the tire molten rubber material, and maintaining the optimal extrusion temperature to perform the extrusion process of tire preparation;
s20, establishing a tire tread extrusion molding model according to the external dimension of the extrusion die and the fluid volume;
s30, correcting the shape of the extrusion neck ring mold according to the model in the step S20, and selecting a reasonable shape of the extrusion neck ring mold;
in step S30, the shape parameters of the extrusion die include length and sectional area;
dividing an extrusion opening mold into a fluid extrusion section connected with an extrusion gun, an opening mold constant section, an opening mold expanding section and a pre-opening mold section connected with a tire mold along a fluid flowing direction, wherein the shape parameters of the extrusion opening mold comprise the length and the sectional area of the fluid extrusion section, the length and the sectional area of the opening mold constant section, the length and the sectional area of the opening mold expanding section and the length and the sectional area of the pre-opening mold section;
and S40, extruding and injecting the tire molten rubber material into a tire mold by adopting the extrusion die obtained in the step S30 to finish the extrusion process for preparing the tire.
2. The extrusion process in the production of radial tires for automobiles according to claim 1, characterized in that: in step S10, a rotor-free dynamic shear rheometer is used to perform rheological behavior testing on the tire molten rubber, the tire molten rubber is placed in a sealed and constant-temperature biconical mold cavity, a lower half mold of the biconical mold cavity is driven by a motor to perform torsional vibration at a preset frequency and a preset tilt angle to ensure that the tire molten rubber can generate torsional strain, and a torque sensor arranged on an upper half mold of the biconical mold cavity monitors received torque in real time.
3. The extrusion process in the production of radial tires for automobiles according to claim 1, characterized in that: in step S20, the extrusion of the fluid is simulated using an interface tracking method.
4. The extrusion process in the production of radial tires for automobiles according to claim 1, characterized in that: the lengths of the fluid extrusion section, the mouth mold constant section, the mouth mold expanding section and the pre-mouth mold section, the sectional area of the mouth mold constant section, the diameter-changing curve of the mouth mold expanding section and the diameter-changing curve of the pre-mouth mold section are changed one by an orthogonal test method, thereby selecting a reasonable shape of the extrusion die.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111508020.6A CN114425842B (en) | 2021-12-10 | 2021-12-10 | Extrusion process in production of automobile radial tire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111508020.6A CN114425842B (en) | 2021-12-10 | 2021-12-10 | Extrusion process in production of automobile radial tire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114425842A CN114425842A (en) | 2022-05-03 |
| CN114425842B true CN114425842B (en) | 2023-04-18 |
Family
ID=81312001
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111508020.6A Active CN114425842B (en) | 2021-12-10 | 2021-12-10 | Extrusion process in production of automobile radial tire |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114425842B (en) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6691558B1 (en) * | 2002-07-31 | 2004-02-17 | General Electric Company | In-line rheometer device and method |
| CN1595404A (en) * | 2004-06-24 | 2005-03-16 | 上海交通大学 | Digitalized design method of rubber product extrusion die |
| DE602007011183D1 (en) * | 2006-10-26 | 2011-01-27 | Bridgestone Corp | Hydrazine-functionalized polymer |
| JP2009132076A (en) * | 2007-11-30 | 2009-06-18 | Toyo Tire & Rubber Co Ltd | Strip rubber extrusion apparatus and strip rubber extrusion method |
| JP5702087B2 (en) * | 2010-08-26 | 2015-04-15 | 株式会社ブリヂストン | Extruder die manufacturing method |
| CN102567386A (en) * | 2010-12-17 | 2012-07-11 | 软控股份有限公司 | Update method for on-line detection data base |
| CN102555099A (en) * | 2010-12-17 | 2012-07-11 | 软控股份有限公司 | Rubber mixing Mooney viscosity on-line soft-measuring method |
-
2021
- 2021-12-10 CN CN202111508020.6A patent/CN114425842B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN114425842A (en) | 2022-05-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10730255B2 (en) | Method for placing a self-sealing product on the inner surface of a tire | |
| CN104568663A (en) | Device and method for online measuring polymer melt rheological parameter | |
| KR100329301B1 (en) | Thermoplastic Elastomer (TPE) Foam Profile Manufacturing Method and Apparatus for Construction and Automotive Industry | |
| CN110920027B (en) | Polymer dynamic fluidity detection vibration device and detection method | |
| CN114425842B (en) | Extrusion process in production of automobile radial tire | |
| CN106956406A (en) | A kind of rubber dynamic injection forming apparatus and method | |
| US20230028139A1 (en) | Method for the devulcanization of a vulcanized rubber mixture, device for carrying out the method and use of the device for the devulcanization of a vulcanized rubber mixture | |
| Ryan et al. | The dynamics of parison free inflation in extrusion blow molding | |
| Harkin‐Jones et al. | Rotational molding of liquid plastic systems: An assessment of material moldability | |
| JP6939211B2 (en) | Rubber product manufacturing method and equipment | |
| Dai et al. | Inverse designing simulation of extrusion die of auto rubber seal and verifications | |
| CN208714434U (en) | Screw extruder constant pressure head | |
| KR101431583B1 (en) | Curing time setting apparatus and setting method according to green tire | |
| KR100452931B1 (en) | Extrude Process Control Apparatus for Tire Manufacture | |
| KR101216228B1 (en) | Continuous extruding process of polymers | |
| CN203981538U (en) | A kind of proving installation of online sign reclaimed rubber mooney viscosity | |
| SHIMOKUSUZONO et al. | Molten State of Thermoplastic Resin in an Injection Moulding Barrel | |
| US20220193984A1 (en) | Additive manufacturing method for producing a molded article from elastomer | |
| Isayev | Injection Molding of Rubber Compounds | |
| CN113858464A (en) | Efficient mixing line capable of producing masterbatch and final mix during one or more mixes | |
| EP3782789B1 (en) | Injection foam molding method | |
| CN105527194A (en) | Method for detecting processability of rubber for tire | |
| Kovács et al. | New method for warpage characterization of injected parts | |
| EP1549477B2 (en) | Method and apparatus for feeding an expanding agent | |
| CA2276965A1 (en) | Method and device for affecting flow behavior |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |