KR101817763B1 - Method for Curing Winter Tire - Google Patents
Method for Curing Winter Tire Download PDFInfo
- Publication number
- KR101817763B1 KR101817763B1 KR1020150152160A KR20150152160A KR101817763B1 KR 101817763 B1 KR101817763 B1 KR 101817763B1 KR 1020150152160 A KR1020150152160 A KR 1020150152160A KR 20150152160 A KR20150152160 A KR 20150152160A KR 101817763 B1 KR101817763 B1 KR 101817763B1
- Authority
- KR
- South Korea
- Prior art keywords
- heat source
- source medium
- pressure
- supply
- low
- Prior art date
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/0601—Vulcanising tyres; Vulcanising presses for tyres
-
- 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
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/0601—Vulcanising tyres; Vulcanising presses for tyres
- B29D30/0602—Vulcanising tyres; Vulcanising presses for tyres the vulcanising medium being in direct contact with the tyre
Abstract
The present invention relates to a winter tire vulcanizing method, wherein at least one heat source medium supply interruption process is interrupted during a heat source medium supply process for supplying a heat source medium in the vulcanizer, thereby more precisely controlling the heat source medium supply process , Which is caused by vulcanization process of winter tires including rubber compounds with lower glass transition temperature than that of all-season tires, can reduce the defective rate of tire treads and bare tires .
Description
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a winter tire vulcanization method, and more particularly, to a winter tire vulcanization method capable of improving the quality and productivity of a winter tire by reducing defects in the vulcanization process for the winter tire.
As is well known, the tire vulcanization process refers to a process of heating and pressing a green case inserted in a vulcanizing mold so as to have a finished tire shape having a predetermined pattern shape, and having tensile strength increased and elasticity property .
The tire vulcanization process is performed by supplying heat and pressure necessary for vulcanization to the green case, and the amount of heat required for vulcanization is composed of external heat and internal heat and pressure.
Here, the outside temperature is supplied from outside through a platen and a jacket which form the external shape of the vulcanizer, and the inside temperature and pressure are supplied through the heat source medium and the pressure medium supplied to the bladder installed inside the vulcanizer do.
Conventionally, the vulcanization method of a tire has been manufactured in such a manner that the temperature supplied through the platen and the jacket is kept constant, and adjusted according to the vulcanized heat source medium and the vulcanized step through the pressure medium.
Of conventional Thai vulcanization time vulcanization temperature for tire production for passenger, an external temperature is 170 ℃ ~ 190 when uniformly applied within ℃ range, the internal heat source medium 5kg / cm 2 ~ 14kg / cm 2 Supply 10 of the time vulcanization % To 30% of the total pressure, and 60 to 85% of the total pressure of the internal pressure medium at 15 kg / cm 2 to 30 kg / cm 2 .
However, although the supply of the internal heat source and the pressure medium is carried out simply through the bladder, its role plays an important role in changing the physical properties due to the vulcanization of the rubber, improving the adhesion between the semi-finished products,
The supply to the initial high pressure may lead to an excess of the molding length, which may lead to defective drawing, tread manipulation, or the like, which may lead to poor mounting due to wearing during rim installation. If the initial low- However, the green case can not be pushed to the mold, resulting in bare surface defects or poor appearance.
In particular, the rubber for winter tires has viscoelasticity at low temperatures so as to enable braking performance and driving at low temperature snow and ice due to its low glass transition temperature compared to all season tires due to its compound characteristics. However, There is a tendency that the tire can not be drawn out due to the long length of the tread portion when the vulcanizer is pulled out, or the tread portion is scratched and torn due to the molding. In addition, there is also a disadvantage in drawing due to an increase in the production amount of a pattern to which a 3D sieve newly made recently is applied.
Therefore, in the case of applying the same vulcanization step to the vulcanization step for a general tire according to the characteristics of the rubber for a winter tire, it causes a continuous failure, thereby lowering the quality and the production amount, thereby reducing the vulcanization process failure. Development is required.
SUMMARY OF THE INVENTION It is an object of the present invention to overcome the above-mentioned problems, and it is an object of the present invention to more precisely control the heat source medium and the pressure medium supplied inside the vulcanizer, The present invention provides a method of vulcanizing a winter tire,
According to another aspect of the present invention, there is provided a method for vulcanizing a winter tire including a rubber compound having a lower glass transition temperature than that of four seasons tires. The vulcanizing method for a winter tire includes: A heat source medium feeding step of supplying the initial heat source medium when the green case is inserted and the vulcanization is performed; And a pressure medium supplying step of supplying a pressure medium after the supplying of the heat source medium, wherein the supplying of the heat source medium comprises supplying a low-pressure heat source medium with a relatively low-pressure heat source medium; And a high-pressure heat source medium supply step of supplying a high-temperature heat source medium in a relatively high-pressure state after the supply of the low-pressure heat source medium, wherein during a period of performing the low-pressure heat source medium supply step and the high- And stopping the supply of the heat source medium to stop the supply of the heat source medium at least one time and to hold the supplied heat source medium.
Here, the heat source medium is composed of steam, the low pressure ten won medium pressure of the low pressure steam used in the supplying step is 5kgf / cm 2 to 14kgf / cm 2 is made to within the range, high-pressure steam used in the high-pressure ten won fluid supplying step the pressure was 15kgf / cm 2 to 19kgf / cm 2 range Or less.
In addition, the step of stopping the supply of the heat source medium allows the heat source medium to be maintained while closing the valve of the heat source medium supply pipe for a period within a range of 1 second to 15 seconds.
In addition, the low-pressure heat source medium supply step may include supplying a primary heat source medium for supplying the low-pressure steam for 10 seconds or less; Stopping the supply of the low-pressure steam after the primary heat source medium supply step and stopping the supply of the primary heat source medium for maintaining the steam supplied for a period of less than 10 seconds; A second heat source medium supply step of supplying the low-pressure steam again within a period of 10 seconds after the step of stopping the supply of the primary heat source medium; And stopping the supply of the secondary heat source medium to stop the steam supply after the supply of the secondary heat source medium and to maintain the steam supplied for a period of 10 seconds or less.
In addition, the high-pressure heat source medium supply step may include: a third heat source medium supply step of supplying the high-pressure steam for 30 seconds or less after the second heat source medium supply stop step; Stopping the supply of the high-pressure steam after the third heat source medium supply step and stopping the supply of the third heat source medium for maintaining the steam supplied for 5 seconds or less; And a fourth heat source medium supplying step of supplying the high-pressure steam again for a period of not more than 90 seconds after the third heat source medium supply stop step.
According to the winter tire vulcanization method of the present invention, at least one heat source medium supply interruption process is interrupted during the supply of the heat source medium for supplying the heat source medium in the vulcanizer, thereby finely adjusting the heat source supply process This makes it possible to reduce the defective rate of tire tearing and bending at the time of withdrawal of the finished product tire due to the draw-out problem caused by the length of the tread formed in the vulcanization process of the winter tire including the rubber compound having a lower glass transition temperature than the four- .
1 is a graph showing a change in internal pressure during a winter tire vulcanization according to an embodiment of the present invention.
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same or similar components are denoted by the same reference numerals throughout the specification.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a graph showing changes in internal pressure during a winter tire vulcanization according to an embodiment of the present invention. FIG.
Referring to Table 1, which will be described later with reference to FIG. 1, the winter tire vulcanization process according to the present embodiment mainly comprises a heat source supply step, a pressure medium supply step, a medium recovery step, and a tire take-out step.
Here, the heat source medium supply step is a process of inserting a green case of the winter tire into a vulcanizer equipped with a vulcanization mold and supplying an initial heat source medium when vulcanization is performed.
In the pressure medium supply step, the pressure medium is supplied after the heat source medium supply step.
The medium recovery and tire withdrawing step is a step of recovering the medium after the pressure medium supply step and withdrawing the vulcanized finished tire.
Accordingly, in the vulcanizing process of the tire, the green case in the vulcanizer is drawn in, the supply of the internal medium is gradually supplied to the pressure medium after the supply of the heat source medium and the tire is vulcanized. Is completed.
As described above, the rubber for winter tires has viscoelasticity even at a low temperature so as to be capable of braking performance and driving in low-temperature snow and ice due to its low glass transition temperature as compared with all season tires due to its compound characteristics. There is a tendency that the tire can not be drawn out due to the long length of the tread portion due to the relatively long tread length during the vulcanizer withdrawal or the tread portion is scratched and torn by the tread portion.
Therefore, the winter tire vulcanization method of the present embodiment makes it possible to lower the rate of tire failure occurrence by more precisely adjusting the heat source medium step and the pressure medium supply step, which are supplied from inside the vulcanizer.
That is, a low-pressure heat source medium supply step of supplying the heat source medium in a relatively low-pressure state and a high-pressure heat source medium supply step of supplying the heat source medium in a relatively high-pressure state after the supply of the low- .
Here, the heat source medium is done using steam, comprising a saturated water vapor, less than the pressure of the low pressure steam used in the low-pressure ten won fluid supplying step is 5kgf / cm 2 to 14kgf / cm 2 range, using the high pressure ten won fluid supplying step The pressure of the high-pressure steam is in the range of 15 gf / cm 2 to 19 kgf / cm 2 .
During the period in which the low-pressure heat source medium supply step and the high-pressure heat source medium supply step are performed, the supply of the heat source medium is stopped by stopping the supply of the heat source medium at least once at a time interval Respectively.
In the present embodiment, the low-pressure heat source medium supply step includes a first heat source medium supply step STEP 1, a first heat source medium supply stop step STEP 2, a second heat source medium supply step STEP 3, (STEP 4).
Here, the primary heat source supply step (STEP 1) is performed at 10 kgf / cm 2 Pressure steam for a period of 10 seconds.
In STEP 2, the supply of the low-pressure steam is stopped after the primary heat source medium supply step (STEP 1), and the steam supplied for 10 seconds is maintained.
In the secondary heat source medium supply step (STEP 3), low pressure steam of 10 kgf / cm 2 is supplied again for 10 seconds after the stop of the supply of the primary heat source medium (STEP 2).
In the second heat source medium supply stop step (STEP 4), the steam supply is stopped after the second heat source supply step (STEP 3), and the steam supplied for 10 seconds is maintained.
In this way, the low pressure ten won fluid supplying step, but the above-described first and second ten won fluid supplying step (STEP 1, STEP 3) a relatively low 5kgf / cm 2 to the low pressure supply to the low pressure steam of less than 14kgf / cm 2 range from The steam supply is adjusted in time so that the green case at room temperature receives a heat source in the vulcanizer so that the flow of the relative rubber is improved. After the supply of the first and second heat source media (STEP 1, STEP 3) (STEP 2, STEP 4) to prevent the rubber from adhering to the shape of the mold due to excessive temperature rise.
The high-pressure heat source medium supply step includes a third heat source medium supply step (STEP 5), a third heat source supply stop step (STEP 6), and a fourth heat source medium supply step (STEP 7).
Here, in the third heat source medium supply step (STEP 5), the high-pressure steam is supplied again at a pressure of 15 kgf / cm 2 for a period of 30 seconds after the step of stopping the supply of the secondary heat source medium (STEP 4).
In the step of stopping the supply of the third heat source medium (STEP 6), the supply of the high-pressure steam is stopped after the supply of the third heat source medium, and the steam supplied for 5 seconds or less is maintained.
In the fourth heat source medium supply step STEP 7, the high-pressure steam is supplied again at a pressure of 15 kgf / cm 2 for a period of not more than 90 seconds after the third heat source medium supply stop step (STEP 6).
Thus, the high-pressure ten won medium supply step is supplied to the steam within the tertiary and quaternary ten won fluid supplying step (STEP 5, STEP 7) a relatively high 15kgf / cm 2 to 19kgf / cm 2 range from the high-pressure normal So as to prevent the occurrence of uncrosslinked flow and to ensure that sufficient pressure is maintained between the interface between the semi-finished product and the interface so as to increase air removal and adhesion between the semi-manufactured products. In the third and fourth heat source supply steps (STEP 5, STEP 7) to stop the supply of tertiary heat source medium (STEP 6), thereby preventing the rubber from being stuck to the shape of the mold due to excessive temperature rise.
The pressure medium supply step is performed step by step through the low pressure medium supply step (STEP 8) and the high pressure medium supply step (STEP 9) as in the heat source medium supply step.
In this embodiment, nitrogen gas is used as the pressure medium, steam is used as the heat source medium, and the pressure of the nitrogen gas used in the low pressure medium supply step (STEP 8) is within the range of 15 kgf / cm 2 to 20 kgf / cm 2 is, the pressure of the nitrogen gas used in the high-pressure pressure fluid supplying step (sTEP 9) is 21kgf / cm 2 to 25kgf / cm 2 range .
Step supply the low-pressure pressure medium in this embodiment (STEP 8) The 20kgf / cm 2 Supply of nitrogen gas for 25 seconds duration, and the high-pressure pressure fluid supplying step (STEP 9) the nitrogen gas of 25kgf / cm 2 360 Second period of time.
As described above, in the pressure medium supply step, by supplying the low-pressure medium supply step (STEP 8) and the high-pressure medium supply step (STEP 9) stepwise by increasing the cirrus pressure, The pressure of the nitrogen gas is higher than that of the pressure of the nitrogen gas, so that the gas of the steam is compressed by the supply of the nitrogen gas to generate condensed water due to the relative pressure and temperature difference, or the steam in the bladder accumulates to cause a relative temperature imbalance, Thereby making it possible to solve the problem of causing unbalance of the heat quantity.
The medium recovery step is a step of recovering the heat source medium and the pressure medium supplied in the curing unit, and includes a gas leakage and drainage step (STEP 10) and a main drainage step (STEP 11).
Here, the gas leakage and drainage step (STEP 10) is performed for a period of 60 seconds, and the main drainage step (STEP 11) is performed for a period of 45 seconds.
Experimental Example
As shown in Table 1, each of the winter tires was manufactured using the conventional four season tire vulcanization method and the winter tire vulcanization method according to one embodiment of the present invention, and their durability evaluations were performed.
Table 2 shows the effect of the winter tire vulcanization method according to the embodiment of the present invention when applied to a winter tire for a passenger car.
Therefore, as shown in Table 2, the winter tires produced according to the winter tire vulcanization method of the present invention as a result of evaluation of vulcanization degree and tire durability of each winter tire vulcanization step were smaller than those of the tire manufactured according to the conventional four- It was found that the vulcanization time was shortened by 0.3 minutes and the length of the tread was also shortened by -3.5 mm from -3.5 mm on the tread, 4.0 mm from the wing tip and 1.5 mm from the bead.
While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but many variations and modifications may be made without departing from the spirit and scope of the invention. And it goes without saying that they belong to the scope of the present invention.
Claims (5)
A heat source supply step of supplying the initial heat source medium during vulcanization by inserting the green case of the winter tire into a vulcanizer equipped with a vulcanizing mold; And
And a pressure medium supply step of supplying a pressure medium after the heat source medium supply step,
Wherein the heat source medium supply step includes:
A low-pressure heat source medium supply step of supplying a low-pressure heat source medium in a relatively low pressure state; And
And a high-pressure heat source medium supply step of supplying a high-pressure heat source medium having a relatively high pressure state after the supply of the low-pressure heat source medium,
Pressure heat source medium or the high-pressure heat source medium during the period of performing the low-pressure heat source medium supply step and the high-pressure heat source medium supply step, the supply of the low-pressure heat source medium or the high- And a step of stopping the supply of the heat source medium for holding the high-pressure heat source medium,
The low-pressure heat source medium supply step may include:
First ten won fluid supplying step of supplying over within 10 seconds of the period of low-pressure steam at a pressure of 5kgf / cm 2 to 14kgf / cm 2 range;
Stopping the supply of the low-pressure steam after the supply of the primary heat source medium and maintaining the low-pressure steam supplied for a period of less than 10 seconds;
Ten won the secondary medium supply supplying for less than 10 seconds of the period again the low-pressure steam after the step stops the first ten won medium supplied at a pressure of 5kgf / cm 2 to 14kgf / cm 2 range; And
And stopping the supply of the secondary heat source medium after the supply of the secondary heat source medium, and stopping the supply of the low-pressure steam for 10 seconds or less,
The high-pressure heat source medium supply step includes:
Ten won the secondary medium supply stop 15kgf high pressure steam again after step / cm 2 to 19kgf / cm 2 range Supplying the third heat source medium for a period of time not exceeding 30 seconds;
Stopping the supply of the high-pressure steam after the supply of the third heat source medium and maintaining the high-pressure steam supplied for a period of not more than 5 seconds; And
The cubic ten won medium supply stop the high pressure steam 15kgf again after step / cm 2 to 19kgf / cm 2 range And a fourth heat source medium supply step of supplying the heat source medium for a period of time not exceeding 90 seconds.
Wherein the step of stopping the supply of the primary heat source medium to the step of stopping the supply of the tertiary heat source medium maintains the supplied heat source medium while closing the valve of the heat source medium supply pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020150152160A KR101817763B1 (en) | 2015-10-30 | 2015-10-30 | Method for Curing Winter Tire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020150152160A KR101817763B1 (en) | 2015-10-30 | 2015-10-30 | Method for Curing Winter Tire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR20170050522A KR20170050522A (en) | 2017-05-11 |
| KR101817763B1 true KR101817763B1 (en) | 2018-01-11 |
Family
ID=58742244
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020150152160A KR101817763B1 (en) | 2015-10-30 | 2015-10-30 | Method for Curing Winter Tire |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR101817763B1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101973285B1 (en) * | 2017-11-06 | 2019-04-26 | 금호타이어 주식회사 | Curing Method for PCR Tire |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102431106A (en) | 2010-10-12 | 2012-05-02 | 双钱集团（如皋）轮胎有限公司 | Variable pressure vulcanization process for large-specification meridian line farm tire |
| CN102441956A (en) | 2010-10-12 | 2012-05-09 | 双钱集团（如皋）轮胎有限公司 | OTR radial tire vulcanization technology |
| JP2015047845A (en) * | 2013-09-04 | 2015-03-16 | 横浜ゴム株式会社 | Vulcanization method and vulcanization system for run-flat tire |
-
2015
- 2015-10-30 KR KR1020150152160A patent/KR101817763B1/en active IP Right Grant
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102431106A (en) | 2010-10-12 | 2012-05-02 | 双钱集团（如皋）轮胎有限公司 | Variable pressure vulcanization process for large-specification meridian line farm tire |
| CN102441956A (en) | 2010-10-12 | 2012-05-09 | 双钱集团（如皋）轮胎有限公司 | OTR radial tire vulcanization technology |
| JP2015047845A (en) * | 2013-09-04 | 2015-03-16 | 横浜ゴム株式会社 | Vulcanization method and vulcanization system for run-flat tire |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20170050522A (en) | 2017-05-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR102040039B1 (en) | Tire vulcanizer mold temperature control device | |
| CN102481744A (en) | Method For Producing Reclaimed Tire | |
| KR101817763B1 (en) | Method for Curing Winter Tire | |
| JP5116504B2 (en) | Rehabilitated tire manufacturing method | |
| EP1509385B1 (en) | Method and apparatus for moulding and curing a tyre for vehicle | |
| CN102666056B (en) | A method of controlling flaw formation in a sealing layer of a tyre during a process for producing self- sealing tyres for vehicle wheels and process for producing self-sealing tyres for vehicle wheels | |
| JP2016007756A (en) | Vulcanization molding method of pneumatic tire | |
| JP2020152031A (en) | Method for manufacturing pneumatic tire | |
| KR200365711Y1 (en) | Piping Structure of Tire Garbage Machine | |
| JP2015199286A (en) | Mold for tire vulcanization, tire vulcanization device, and tire vulcanization method | |
| KR100518304B1 (en) | Electric curing machine | |
| JP2016210136A (en) | Tire vulcanization method | |
| KR100867599B1 (en) | Retread cure system and its method | |
| JP5193497B2 (en) | Adjustment method of tire vulcanization degree | |
| KR101323286B1 (en) | Device for vulcanizing tire | |
| KR20180045995A (en) | Method for Curing Ultra Light Down Tire | |
| KR102204893B1 (en) | Release agent for Tire Mold | |
| JP6309392B2 (en) | Rehabilitated tire manufacturing method | |
| JP2023091335A (en) | Tire manufacturing method | |
| KR100509728B1 (en) | Supply method of green tire cure medium | |
| JP5974680B2 (en) | Tire manufacturing method and tire vulcanization bladder pre-shaping device | |
| KR102120740B1 (en) | Tire Cure Bladder Auto Shaping Control System | |
| KR100597903B1 (en) | Pre-forming apparatus of tire bladder | |
| JP2022161516A (en) | Method and apparatus for manufacturing pneumatic tire | |
| KR101809247B1 (en) | Curing bladder for the tire bead shape improvements |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A201 | Request for examination | ||
| E902 | Notification of reason for refusal | ||
| E90F | Notification of reason for final refusal | ||
| GRNT | Written decision to grant |