CN115648691A - Production process for improving endurance performance of tire crown and inspection method - Google Patents
Production process for improving endurance performance of tire crown and inspection method Download PDFInfo
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- CN115648691A CN115648691A CN202211219114.6A CN202211219114A CN115648691A CN 115648691 A CN115648691 A CN 115648691A CN 202211219114 A CN202211219114 A CN 202211219114A CN 115648691 A CN115648691 A CN 115648691A
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Abstract
The invention relates to a production process and a detection method for improving the endurance performance of a tire crown, and belongs to the field of tire production and detection. The method comprises the following steps of adding an adhesive tape thickness online measuring device of an adhesive tape before winding on a green tire winding device in the green tire production process, wherein the winding can be started after the adhesive tape thickness meets the setting requirement; calculating and judging the multi-point symmetrical thickness after the winding of the tire blank is finished, measuring the perimeter of the corresponding point for the second time after the winding of the tire tread is finished, then performing tire side rubber sheet attaching, pressing, pricking and tire unloading operations on the tire blank with the winding thickness of the tire tread meeting the requirements, and finally conveying to a vulcanization process for subsequent vulcanization operation; after the vulcanization is finished, taking out the finished tire from the vulcanizing machine, carrying out operation of flatly placing the tire for more than or equal to 1 vulcanization period, and after the flat placing time is finished, sequentially carrying out mold taking on the measured tire inner radians at four positions by using a mold taking device; and after the model taking is finished, measuring and judging according to the tire section technical standard.
Description
Technical Field
The invention relates to the field of tire production and detection, in particular to a production process and a detection method for improving the durability of a tire crown.
Background
As is well known, in the production process of the conventional engineering radial tire, the winding thickness of the tire tread fluctuates, the factory inspection capability of the conventional product is insufficient, and the product with the tire crown thickness deviation problem cannot be timely and effectively identified, so that the quality problems of delamination, abnormal abrasion and the like occur at the early stage of the tire crown and the tire shoulder in the use process of the tire, and the overall service life of the tire is influenced.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a production process and a test method for improving the endurance of a tire crown, which can improve the overall size conformance of the tire crown, improve the product test capability by the test method, effectively identify and control the abnormal problems of the thicknesses of the tire crown and the tire shoulder area and the crown curve in a tire, and reduce the quality problems of tire crown delamination and abnormal tread abrasion caused by the abnormal problems.
The technical scheme adopted by the invention for solving the technical problem is as follows: a production process for improving the endurance performance of a tire crown and a test method thereof are characterized by comprising the following steps,
a. an on-line adhesive tape thickness measuring device of an adhesive tape before winding is added on a green tire winding device in the green tire production process, and winding can be started after the adhesive tape thickness meets the setting requirement;
b. calculating and judging the multipoint symmetrical thickness after the winding of the tire blank, namely measuring and calculating the circumference of a corresponding point for the second time after the winding of the tire tread is finished, judging the conformity and the symmetry of the actual winding thickness of the tire tread according to the standard, then performing tire side film attaching, pressing, pricking and tire unloading operations on the tire blank with the winding thickness of the tire tread meeting the requirement, and finally conveying to a vulcanization process for subsequent vulcanization operation;
c. after vulcanization, taking out the finished tire from the vulcanizing machine, carrying out operation of flatly placing the tire for more than or equal to 1 vulcanization period, after the flat placing time is over, sequentially measuring the thicknesses of the shoulders of the upper mold and the lower mold of the tire, marking points corresponding to the thicknesses of the shoulders of the tire inner side, and sequentially carrying out mold taking on the tire inner radians at four measured positions by using a mold taking device;
d. after the model taking is finished, the model taking device is placed on a profile drawing of a product to be measured, wherein the profile drawing is 1, the center of the model taking device corresponds to the center of the profile drawing, then an actual tire inner curve of the tire is drawn on the profile drawing according to the shape of the model taking device, and finally the model taking result is measured and judged according to the tire section technical standard.
The invention can also be realized by the following measures:
the adhesive tape thickness meets the set requirement, namely the adhesive tape is subjected to multi-point position perimeter measurement according to the technical standard after the tire blank is shaped before winding, the measured tire blank is transferred to a station to be wound, then cold feed is started, the extruded adhesive tape is led to tire blank winding equipment and a guide roller thereof through a cooling drum and a conveyor belt, when the extruded adhesive tape passes through an adhesive tape thickness online measuring device, the adhesive tape thickness is automatically measured, and when the adhesive tape thickness meets the set standard range, the winding machine can start winding.
The center of the mold extractor corresponds to the center of the tire during mold extraction, the width of the two sides of the mold extractor is larger than the point marked by the thickness of the shoulder, and the position of the mold extractor corresponding to the point of the shoulder is marked on the mold extractor.
The tire tread area inspection method has the advantages that the overall size conformance of the tire tread area can be improved, the inspection capability is improved through the inspection method, the abnormal problems of the thicknesses of the tire crown area and the tire shoulder area and the crown curve in the tire are effectively identified and controlled, and the failure rate caused by crown falling and abnormal tire tread is reduced.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic structural view of an on-line measuring device for measuring the thickness of an adhesive tape added to a pre-winding adhesive tape on a green tire winding apparatus according to the present invention.
FIG. 2 is a schematic representation of a pre-winding thickness measurement of a tread of the present invention.
FIG. 3 is a schematic representation of a thickness measurement of the tread of the present invention after winding.
FIG. 4 is a diagram of a finished tire shoulder position.
FIG. 5 is a graphical representation of shoulder thickness on the corresponding drawing sheet after measurement.
In the figure, 1, a green tire winding device and 2, an on-line measuring device for the thickness of an adhesive tape are shown.
Detailed Description
As shown in figure 1, an LTG-680 type rubber strip thickness online measuring device 2 of a rubber strip before winding is additionally arranged on a tire blank winding device 1 in the tire blank production process, the device is mainly used for measuring the thickness of the wound rubber strip, when the thickness of the rubber strip exceeds the standard during the start-up winding of the tire blank, the tire blank winding device 1 cannot be started, and after the thickness meets the set requirement, the tire tread can be started for winding, so that the normal production is carried out.
As shown in figure 2, the measurement of multipoint symmetrical perimeter is added before the green tire is wound, which means that the green tire is measured in a multipoint position perimeter by using a measuring tape according to technical standards before being wound after being shaped in the forming process, and the multipoint position perimeter is recorded according to the principles of a point, b point 8230, n point and the like (note that the point positions of the a point, the b point and the like are parameters of a standard position issued according to the technology, and then the positioning light mark is used for realizing the determination of each measurement position).
( Remarking: since the number of dots is designed differently depending on the specification, the number of n dots is not limited to the points a, b, and c, and may be up to h or p. )
And transferring the measured green tire to a station to be wound, opening the cold feed, leading the extruded rubber strip to a winding machine and a guide roller thereof through a cooling drum and a conveyor belt, automatically measuring the thickness of the extruded rubber strip when the extruded rubber strip passes through an online side thickness device, and starting winding by the winding machine under the condition that the thickness of the extruded rubber strip meets a set standard range. Note: if the adhesive tape thickness does not accord with, can't start and will abolish because of the equipment has set for the mistake proofing.
As shown in fig. 3, after the green tire is wound, the second corresponding point circumference measurement is performed, recording is performed according to the principle of points a and B8230and N (note that the positioning modes of the points a and B are the same as the point positions of the points a and B), then the actual winding thickness is calculated (note that the calculation formula of the thickness of the point a is: a = (the circumference of the point a/pi-a/pi)/2, and the calculation modes of the thicknesses of the other points are the same), and the conformity and the symmetry of the standard are judged according to the standard.
And then performing operations such as sidewall rubber sheet attaching, pressing, falling and pricking, tire unloading and the like on the tire blank with the tire tread winding thickness meeting the requirement, and finally conveying to a vulcanization process for subsequent vulcanization production operation.
As shown in fig. 4, after the vulcanization is finished, the finished tire is taken out of the vulcanizer, the flat car is used to perform the operation of keeping the tire flat for more than or equal to 1 vulcanization cycle, after the flat time is finished, the caliper gauge is used to measure the thicknesses of the shoulder parts of the upper mold and the lower mold of the tire in sequence (note: 90 °/point measurement), and the points corresponding to the thicknesses of the shoulder parts in the tire are marked, respectively: upper 1, lower 1, upper 2, lower 2, upper 3, lower 3, upper 4 and lower 4; and records the measured data. And then sequentially carrying out mold taking on the measured tire inner radians at the four positions by using a mold taking device, wherein the center of the mold taking device corresponds to the center of the tire during mold taking, the width of the two sides of the mold taking device is larger than the point position marked by the thickness of the shoulder, and the position of the mold taking device corresponding to the point position of the shoulder is marked on the mold taking device.
As shown in fig. 5, after the model extraction is finished, the model extractor is placed on the profile drawing of 1.
Claims (3)
1. A production process for improving the endurance performance of a tire crown and a test method thereof are characterized by comprising the following steps,
a. an on-line adhesive tape thickness measuring device of an adhesive tape before winding is added on a green tire winding device in the green tire production process, and winding can be started after the adhesive tape thickness meets the setting requirement;
b. performing multipoint symmetrical thickness calculation and judgment after the winding of the tire blank, namely performing second corresponding point circumference measurement and calculation after the winding of the tire tread is finished, judging the conformity and the symmetry of the actual thickness of the wound tire tread according to the standard, performing tire side film attaching, pressing, pricking and tire unloading operation on the tire blank with the wound tire tread thickness meeting the requirement, and finally conveying to a vulcanization process for subsequent vulcanization operation;
c. after vulcanization, taking out the finished tire from the vulcanizing machine, carrying out operation of flatly placing the tire for more than or equal to 1 vulcanization period, after the flat placing time is over, sequentially measuring the thicknesses of the shoulders of the upper mold and the lower mold of the tire, marking points corresponding to the thicknesses of the shoulders of the tire inner side, and sequentially carrying out mold taking on the tire inner radians at four measured positions by using a mold taking device;
d. after the model taking is finished, the model taking device is placed on the profile drawing of the product to be measured, wherein the profile drawing is 1.
2. The production process and the inspection method for improving the endurance of the tire crown according to claim 1, wherein the thickness of the rubber strip meets the setting requirement, which means that the circumference of the tire blank is measured at multiple points according to the technical standard before winding after the tire blank is shaped, the measured tire blank is transferred to a station to be wound, then cold feed is started, the extruded rubber strip is guided to tire blank winding equipment and a guide roller thereof through a cooling drum and a conveyor belt, when the extruded rubber strip passes through the rubber strip thickness online measuring device, the thickness of the rubber strip is automatically measured, and when the thickness of the rubber strip meets the range of the set standard, the winding machine can start winding.
3. The production process and the inspection method for improving the endurance of the crown of the tire as claimed in claim 1, wherein the center of the extractor corresponds to the center of the tire during the extraction, the width of the two sides of the extractor is larger than the point marked by the thickness of the shoulder, and the position of the extractor corresponding to the point of the shoulder is marked on the extractor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211219114.6A CN115648691A (en) | 2022-10-08 | 2022-10-08 | Production process for improving endurance performance of tire crown and inspection method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211219114.6A CN115648691A (en) | 2022-10-08 | 2022-10-08 | Production process for improving endurance performance of tire crown and inspection method |
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| CN115648691A true CN115648691A (en) | 2023-01-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211219114.6A Pending CN115648691A (en) | 2022-10-08 | 2022-10-08 | Production process for improving endurance performance of tire crown and inspection method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115782274A (en) * | 2023-02-07 | 2023-03-14 | 广饶县计量测试检定所(广饶县产品质量检验所、广饶县橡胶轮胎产品与材料质量检验中心) | Process for ensuring quality of shoulder pad rubber of giant tire |
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2022
- 2022-10-08 CN CN202211219114.6A patent/CN115648691A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115782274A (en) * | 2023-02-07 | 2023-03-14 | 广饶县计量测试检定所(广饶县产品质量检验所、广饶县橡胶轮胎产品与材料质量检验中心) | Process for ensuring quality of shoulder pad rubber of giant tire |
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