Tire rubber compound flow measurement method and adjustment method based on it

Abstract

The present invention relates to the technical field of tire production, and more particularly to a method for measuring tire rubber flow and an adjustment method based thereon. The measurement and judgment method comprises the following steps: S1, marking a line A on the tread half and a line B on the sidewall; S2, pressing the sidewall half, cushion rubber, and tread half together, and measuring the spacing between adjacent lines A and B; S3, marking a line C on the sidewall and a line D on the shoulder; S4, vulcanizing the tire blank; S5, measuring the lines A, B, C, and D after vulcanization; S6, comparing the spacing between the lines A and B after pressing and after vulcanization to determine the tread and sidewall thicknesses, determining the sidewall rubber flow based on the curvature of the line C after vulcanization, and determining the shoulder width based on the distance between the line D and the shoulder after vulcanization. The measurement and judgment method provided by the present invention has higher accuracy, higher efficiency, and lower cost.

Description

Technical Field

[0001] The present invention relates to the technical field of tire production, and in particular to a method for measuring tire rubber flow and an adjustment method based thereon. Background Art

[0002] After the material distribution design of tire development is determined, the size design of the tread half component and the sidewall half component is mostly determined based on previous empirical formulas; if the size of the tread half component and the sidewall half component is inappropriate, and the material distribution of the rubber compound does not fit the mold size well, during the vulcanization process, the rubber compound of the tread half component and the sidewall half component will flow relative to the mold under the high temperature and high pressure capsule extrusion, resulting in the distribution of different types of rubber compounds in the finished tire after vulcanization being inconsistent with the design requirements; this will in turn lead to quality problems and safety hazards in the subsequent use of the finished tire.

[0003] During the trial production and testing of finished tires or the random inspection and verification of finished tires, the conventional tire outer edge dimension measurement, CTL measurement and other measurement methods cannot effectively measure the sidewall thickness, tread thickness and tread shoulder dimensions of the finished tires because the colors of the sidewall rubber, tread rubber and other layers of the finished tires are similar.

[0004] In the existing technology, measurement is mostly performed by cutting the end face of the finished tire. However, this measurement method requires cutting the finished tire, causing damage, which leads to extremely high measurement costs. The contact interface line between different types of rubber is not obvious, resulting in large measurement errors. In addition, the measurement process is relatively cumbersome, the measurement time is long, and the measurement efficiency is low. Summary of the Invention

[0005] In view of this, an object of the present invention is to provide a tire rubber material flow measurement method and an adjustment method based thereon to solve the above-mentioned problem.

[0006] The technical solutions of the present invention are as follows:

[0007] The method for measuring and judging the flow of rubber material on the surface of a tire blank is characterized by comprising the following steps:

[0008] S1. Make several equally spaced marking lines A on the tread half and several equally spaced marking lines B on the sidewall half.

[0009] S2, pressing the cushion rubber and the tread half component and the sidewall half component obtained in step S1 to obtain a tire blank, and measuring the distance between each adjacent marking line A and the distance between each adjacent marking line B after the pressing;

[0010] S3. Make an oblique marking line C on the sidewall of the tire and a marking line D along the two shoulder ridges of the tire.

[0011] S4, vulcanizing the tire blank obtained in step S3 to obtain a finished tire;

[0012] S5. Measure the distance between each two adjacent marking lines A after vulcanization, measure the distance between each two adjacent marking lines B after vulcanization, the curvature of the marking line C after vulcanization and observe the continuity of the line segment, and the distance between the marking line D after vulcanization and the shoulder of the finished tire on the same side;

[0013] S6. Determine whether the thickness of the tread half component is reasonable by comparing the distance between the two adjacent marking lines A after pressing and molding and the change in the distance between the two adjacent marking lines A after vulcanization. Determine whether the thickness of the sidewall half component is reasonable by comparing the distance between the two adjacent marking lines B after pressing and molding and the change in the distance between the two adjacent marking lines B after vulcanization. Determine whether the sidewall rubber flows significantly based on the curvature and line segment continuity of the marking line C after vulcanization. Determine whether the shoulder width of the tread half component is reasonable based on the distance between the marking line D after vulcanization and the shoulder of the finished tire on the same side.

[0014] Preferably, the marking line A in step S1 is marked according to the following method:

[0015] Starting from the first central axis of the tread of the tread half component, make several equally spaced marking lines A toward both sides of the width direction of the tread half component until the distance between the outermost marking line A and the two side edges of the tread half component is less than the distance between two adjacent marking lines A.

[0016] Preferably, the marking line B in step S1 is marked according to the following method:

[0017] Starting from the sidewall rubber centerline of the sidewall half component, a first calibration area and a second calibration area of ​​length h are respectively taken on both sides of the sidewall half component in the width direction, where h = 2H / 3; wherein H is half of the sidewall rubber width;

[0018] Starting from the sidewall rubber centerline of the sidewall half component, make several equally spaced marking lines B in the first marking area and the second marking area along the width direction of the sidewall half component until the distance between the two outermost marking lines B and the outer edges of the first marking area and the second marking area respectively is less than the distance between two adjacent marking lines B.

[0019] Preferably, the marking line C in step S3 is marked according to the following method:

[0020] On the sidewall, make a marking line C from the shoulder to the heel of the tire blank at an angle of 45° to the radial direction of the tire blank.

[0021] Preferably, in step S6, the specific method of comparing the distance between two adjacent marking lines A after pressing and the change in the distance between the two adjacent marking lines A after vulcanization to determine whether the thickness of the tread half component is reasonable is:

[0022] If the distance between two adjacent marking lines A after compression molding is equal to the distance between the two adjacent marking lines A after vulcanization, the thickness of the tread half components at the two adjacent marking lines A is reasonable;

[0023] If the distance between two adjacent marking lines A after vulcanization is greater than the distance between the two adjacent marking lines A after compression molding, the thickness of the tread half component at the two adjacent marking lines A is too thick; otherwise, the thickness of the tread half component at the two adjacent marking lines A is too thin.

[0024] Preferably, in step S6, the specific method for comparing the distance between two adjacent marking lines B after pressing and forming and the change in the distance between the two adjacent marking lines B after vulcanization to determine whether the thickness of the sidewall half component is reasonable is:

[0025] If the distance between two adjacent marking lines B after compression molding is equal to the distance between the two adjacent marking lines B after vulcanization, the thickness of the sidewall half component at the two adjacent marking lines B is reasonable;

[0026] If the distance between two adjacent marking lines B after vulcanization is greater than the distance between the two adjacent marking lines B after compression molding, the thickness of the sidewall half component at the two adjacent marking lines B is too thick; otherwise, the thickness of the sidewall half component at the two adjacent marking lines B is too thin.

[0027] Preferably, in step S6, the specific method for judging whether the sidewall rubber material has obvious flow according to the curvature of the marking line C after vulcanization is:

[0028] If the curvature of the marking line C after vulcanization is greater than or equal to 2000 mm and the line segment of the marking line C after vulcanization is continuous, there is no obvious flow of the sidewall rubber;

[0029] If the curvature of the marking line C after vulcanization is less than 2000 mm or the line segment of the marking line C after vulcanization is discontinuous, there is obvious flow of the sidewall rubber.

[0030] Preferably, in step S6, the specific method for judging whether the shoulder width of the tread half component is reasonable based on the distance between the post-vulcanization marking line D and the shoulder of the finished tire on the same side is:

[0031] If both marking lines D after vulcanization are located on the shoulders of the finished tire, the shoulder width of the tread half component is reasonable; if either of the two marking lines D after vulcanization is located on the tire side of the finished tire, the shoulder width of the tread half component is too wide; if either of the two marking lines D after vulcanization is located on the tire running surface of the finished tire, the shoulder width of the tread half component is too narrow.

[0032] An adjustment method, characterized in that the adjustment method is carried out on the basis of the measurement and judgment method of the rubber material flow on the surface of the tire blank as described in any one of the above items, and comprises the following steps:

[0033] If the distance between two adjacent marking lines A after compression molding is not equal to the distance between the two adjacent marking lines A after vulcanization, the thickness of the tread half components at the two adjacent marking lines A needs to be adjusted. The adjustment amount x is calculated according to the following formula:

[0034]

[0035] Wherein, a1 is the thickness of the tread half component at the two adjacent marking lines A before pressing and forming, e2 is the distance between the two adjacent marking lines A after pressing and forming, and e3 is the distance between the two adjacent marking lines A after vulcanization;

[0036] If the distance between two adjacent marking lines B after compression molding is not equal to the distance between the two adjacent marking lines B after vulcanization, the thickness of the sidewall half component at the two adjacent marking lines B needs to be adjusted. The adjustment amount y is calculated according to the following formula:

[0037]

[0038] Wherein, b1 is the thickness of the tread half component at the two adjacent marking lines B before pressing and forming, f2 is the distance between the two adjacent marking lines B after pressing and forming, and f3 is the distance between the two adjacent marking lines B after vulcanization;

[0039] If either of the two marking lines D after vulcanization is located on the tire side of the finished tire, the shoulder width of the tread half needs to be adjusted. The shoulder width d2 of the tread half is calculated according to the following formula:

[0040]

[0041] If either of the two marking lines D after vulcanization is located on the running surface of the finished tire, the shoulder width of the tread half needs to be adjusted. The shoulder width d2 of the tread half is calculated according to the following formula:

[0042]

[0043] Wherein, d1 is the shoulder width of the front tread half component after compression molding, g1 is the distance between a marking line D and its shoulder on the same side, and g2 is the distance between another marking line D and its shoulder on the same side.

[0044] It can be seen from the above technical solution that compared with the prior art, the present invention has the following advantages:

[0045] The tire rubber material flow measurement method of the present invention is mainly used for product trial production quality measurement or in the process of random inspection and verification of finished tires. Without damaging the finished tires and without affecting the subsequent use of the finished tires, the flow of rubber materials in the sidewalls, treads, and tread shoulders can be verified, thereby determining whether their thickness or width is reasonable and further determining whether the material distribution design of the finished tire meets the design requirements. The method described in the present invention facilitates analysis during the manufacturing process to ensure process stability, avoid problems such as uneven wear of the tread shoulders and cracks in the sidewalls in the later stages of tire use, and improve the quality stability and safety of tire products.

[0046] Compared with the existing cutting section measurement method, the tire rubber flow measurement method provided by the present invention has higher accuracy, simpler operation, shorter measurement and judgment time, higher measurement and judgment efficiency, and can be measured and judged without damaging the tire, with lower measurement and judgment costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 This is an actual view of the marking line A before pressing and molding;

[0048] Figure 2 Based on Figure 1 Schematic diagram of the marking line A before lamination;

[0049] Figure 3 This is an actual view of the marking line A after pressing and forming;

[0050] Figure 4 Based on Figure 3 Schematic diagram of the marking line A after lamination;

[0051] Figure 5 This is an actual view of the marking line B before vulcanization before pressing and molding;

[0052] Figure 6 Based on Figure 5 Schematic diagram of the marking line B after pressing and forming;

[0053] Figure 7 This is an actual view of the marking line B after pressing and forming;

[0054] Figure 8 Based on Figure 7 Schematic diagram of the marking line B after pressing and forming;

[0055] Figure 9 This is an actual view of the marking line C before vulcanization;

[0056] Figure 10 Based on Figure 9 Schematic diagram of the marking line C before vulcanization;

[0057] Figure 11 This is an actual view of the marking line D before vulcanization;

[0058] Figure 12 Based on Figure 11 Schematic diagram of the marking line D before vulcanization;

[0059] Figure 13 This is the actual view of the marking line A after vulcanization;

[0060] Figure 14 Based on Figure 13 Schematic diagram of the marker line A after vulcanization;

[0061] Figure 15 This is the actual view of the marking line B after vulcanization;

[0062] Figure 16 Based on Figure 15 Schematic diagram of the marker line B after vulcanization;

[0063] Figure 17 This is an actual view of the marking line C after vulcanization;

[0064] Figure 18 Based on Figure 17 Schematic diagram of the marker line C after vulcanization;

[0065] Figure 19 This is an actual view of the marking line D after vulcanization;

[0066] Figure 20 Based on Figure 19 Schematic diagram of the marking line D after vulcanization;

[0067] Figure 21 It is a schematic diagram of the structure of the sidewall half component;

[0068] Figure 22 This is a cross-sectional view of the finished tire.

[0069] Markings in the figure:

[0070] 1. Tread half component 2. Sidewall half component 3. Cushion rubber 4. First center axis

[0071] 5. First sideline 6. Sidewall rubber 7. Second center axis 8. Second sideline

[0072] 9. Wear-resistant rubber 10. Sidewall 11. Shoulder 12. Tread

[0073] 13. Heel point 14. Radial line 15. Diagonal line 16. Marking line A

[0074] 17. Marking line B 18. Marking line C 19. Marking line D 20. Tire side

[0075] 21. Tire running surface DETAILED DESCRIPTION

[0076] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention will be further described below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0077] It should be understood that the orientations or positional relationships indicated by terms such as "upper end face, top, left and right ends, left side, right side", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0078] Special note: In order to explain and understand the technical solution of the present invention more clearly, the " Figure 1 、 Figure 3 、 Figure 5 、 Figure 7 、 Figure 9 、 Figure 11 、 Figure 13 、 Figure 15 、 Figure 17 and Figure 19 ” are drawn into corresponding schematic diagrams: Figure 2 、 Figure 4 、 Figure 6 、 Figure 8 、 Figure 10 、 Figure 12 、 Figure 14 、 Figure 16 、 Figure 18 and Figure 20 .

[0079] The present invention provides a method for measuring tire rubber flow, which comprises the following steps:

[0080] Preparation stage: Select the half components of the finished tire that need to be measured and judged: tread half component 1, sidewall half component 2 and cushion rubber 3, and determine the design size parameters of the tread half component 1, sidewall half component 2 and cushion rubber 3.

[0081] S1, such as Figure 1 and Figure 2 As shown, a number of equally spaced marking lines A16 are made on the tread half component 1 before the tire blank is pressed together, as shown in FIG. Figure 5 and Figure 6 As shown, a number of equally spaced marking lines B17 are made on the sidewall half component 2 before the tire blank is pressed together;

[0082] The specific marking method of the marking line A16 is:

[0083] like Figure 2 As shown, starting from the first central axis 4 in the longitudinal direction of the tread half member 1, the distance between the first central axis 4 and the first edge line 5 at any edge of the tread half member 1 is equal to half of the distance between the first edge lines 5 on both sides of the tread half member 1; starting from the first central axis 4 to the longitudinal direction of the tread half member 1, the distance between the first central axis 4 and the first edge line 5 at any edge of the tread half member 1 is equal to half of the distance between the first edge lines 5 on both sides of the tread half member 1; Figure 2 The tread half component 1 shown has a plurality of equally spaced marking lines A16 on the left and right sides of the first edge line 5, and the marking lines A16 are parallel to the first central axis 4; Figure 2 As shown, the distance between each two adjacent marking lines A16 is e1; when the distance between the outermost marking line A16 and the first edge line 5 of the tread half component 1 on the same side is less than e1, marking is stopped; the value of e1 is 20 mm.

[0084] As a further improvement of the present invention, when the value of e1 is 20 mm, a digital scale can be marked under each marking line A16 according to its distance from the first central axis 4 to facilitate subsequent measurement and calculation.

[0085] The specific marking method of the marking line B17 is:

[0086] like Figure 6 As shown, first, take the second central axis 7 of the sidewall rubber 6 of the sidewall half member 2 in the longitudinal direction as the starting point, and the distance between the second central axis 7 and the second edge line 8 at any edge of the sidewall rubber 6 is equal to half of the distance between the second edge lines 8 on both sides of the sidewall rubber 6; take the second central axis 7 as the starting point and move forward as shown in FIG. Figure 6 The first and second calibration areas of length h are taken in the direction of the second edge lines 8 on the left and right sides of the sidewall rubber 6, respectively; where h = 2H / 3, H is the distance between the second central axis 7 and any second edge line 8, that is, H is half of the width of the sidewall rubber 6; Figure 6 As shown, in the first marking area, a number of marking lines B17 with equal spacing are made along the width direction of the sidewall rubber 6 toward the left, and the spacing between each two adjacent marking lines B17 is f1. When the spacing between the leftmost margin line B and the left edge of the first marking area is less than f1, marking is stopped; similarly, in the second marking area, a number of marking lines B17 with equal spacing are made along the width direction of the sidewall rubber 6 toward the right, and the spacing between each two adjacent marking lines B17 is f1. When the spacing between the rightmost margin line B and the right edge of the second marking area is less than f1, marking is stopped; the value of f1 is 10mm.

[0087] Among them, such as Figure 21 The sidewall half component 2 shown includes a sidewall rubber 6 and a wear-resistant rubber 9 provided at a second edge line 8 of the sidewall rubber 6 .

[0088] It should be noted that the marking line B17 needs to be drawn on both sidewall half members 2 .

[0089] As a further improvement of the present invention, Figure 6 As shown, digital numbers can be placed between each two adjacent marking lines B17 to facilitate subsequent measurement and judgment.

[0090] S2, assembling the cushion rubber 3, the tread half component 1 on which the marking line A16 has been drawn in step S1, and the sidewall half component 2 on which the marking line B17 has been drawn, and pressing them together to obtain a tire blank;

[0091] Since the marking lines A16 and B17 will have slight deformation after the pressing, it is necessary to measure again the distance between each two adjacent marking lines A16 on the tread 12 of the green tire after the pressing, and the distance between each two adjacent marking lines B17 on the sidewall 10 of the green tire after the pressing; Figure 3 and Figure 4 As shown, the distance between each two adjacent marking lines A16 is measured to be e2, and the distance e2 between each two adjacent marking lines A16 after lamination is recorded; Figure 7 and Figure 8 As shown, the distance between each two adjacent marking lines B17 is measured to be f2, and the distance f2 between each two adjacent marking lines B17 after lamination is recorded;

[0092] S3, such as Figure 9 and Figure 10 As shown, an oblique marking line C18 is made on each side of the tire 10; Figure 11 and Figure 12 As shown, a marking line D19 is made on each of the two shoulder ridges 11 of the tire blank.

[0093] The specific marking method of marking line C18 is:

[0094] like Figure 10 As shown, first, a radial line 14 is made on the sidewall 10 from a point on the tread 12 along the radial direction of the tire blank toward the side of the tire heel point 13; a marking line C18 is made on the sidewall 10 with an angle of 45° to the radial line 14, and the two ends of the marking line C18 are respectively located at a point on the tread 12 and the tire heel point 13, and the marking line C18 is a smooth line segment.

[0095] Marking lines C18 need to be drawn on both sidewalls 10 of the tire blank.

[0096] The specific marking method of marking line D19 is:

[0097] like Figure 12As shown, a marking line D19 of a certain length is made along the ridge line of the tire shoulder 11 of the tire blank; preferably, oblique lines 15 can be drawn on the tread 12 and sidewall 10 on both sides of the marking line D19, so that the marking line D19 can be found more quickly and clearly after vulcanization.

[0098] As a further improvement of the present invention, marking lines A16, B17, C18, and D19 can be drawn with silver chalk or white paint. Furthermore, marking line B17 can be marked with a grid-printed cloth. When drawing marking lines A16 and D19, avoid the joints between the tread half component 1 and the cushion rubber 3. When drawing marking lines B17 and C18, avoid the joints between the sidewall half component 2.

[0099] S4. The tire blank with the marking lines A16, B17, C18 and D19 drawn is loaded into a pot for vulcanization, ensuring that the vulcanization process meets the construction requirements of the composite vulcanization process to obtain a finished tire.

[0100] Before proceeding to the subsequent steps, the finished tire needs to be left at room temperature for more than 6 hours. During the rest period, avoid touching the marking lines A16, B17, C18, and D19 on the finished tire to ensure that the marking lines A16, B17, C18, and D19 are clear.

[0101] S5. Measure the marking lines A16, B17, C18, and D19 on the vulcanized finished tire.

[0102] like Figure 13 and 14 As shown, the distance between each two adjacent marking lines A16 on the finished tire after vulcanization is measured, and the measured distance e3 between each two adjacent marking lines A16 is recorded;

[0103] like Figure 15 and Figure 16 As shown, the distance between each two adjacent marking lines B17 on the two sidewalls 10 of the finished tire after vulcanization is measured, and the measured distance f3 between each two adjacent marking lines B17 is recorded;

[0104] like Figure 17 and Figure 18 As shown, the curvature of the curve of the marking line C18 on both sidewalls 10 of the finished tire after vulcanization is measured and recorded, and the line segment continuity of the marking line C18 is observed;

[0105] like Figure 19 and Figure 20As shown, measure the distances between the two marking lines D19 of the vulcanized finished tire and the shoulders 11 of the finished tire on the same side, and record the distance g1 between the left marking line D19 and the left shoulder 11, and record the distance g2 between the right marking line D19 and the right shoulder 11 respectively.

[0106] S6. Compare the change in the distance e2 between two adjacent marking lines A16 after compression molding and the distance e3 between these two adjacent marking lines A16 after vulcanization to determine whether the thickness of the tread semi-component 1 is reasonable; compare the change in the distance f2 between two adjacent marking lines B17 after compression molding and the distance f3 between these two adjacent marking lines B17 after vulcanization to determine whether the thickness of the sidewall semi-component 2 is reasonable; judge whether the sidewall rubber 6 flows significantly according to the bending arc and line segment continuity of the marking line C18 after vulcanization; judge whether the shoulder width of the tread semi-component 1 is reasonable according to the distances g1 and g2 between the marking line D19 after vulcanization and the shoulders 11 of the finished tire on the same side.

[0107] The specific method for comparing the change in the distance e2 between two adjacent marking lines A16 after compression molding and the distance e3 between these two adjacent marking lines A16 after vulcanization to determine whether the thickness of the tread semi-component 1 is reasonable is as follows:

[0108] If the distance e2 between two adjacent marking lines A16 after compression molding is equal to the distance e3 between these two adjacent marking lines A16 after vulcanization, that is, e2 = e3, then the thickness of the tread semi-component 1 at these two adjacent marking lines A16 is reasonable; if the distance e3 between two adjacent marking lines A16 after vulcanization is greater than the distance e2 between these two adjacent marking lines A16 after compression molding, that is, e3 > e2, then the thickness of the tread semi-component 1 at these two adjacent marking lines A16 is too thick; conversely, if e3 < e2, then the thickness of the tread semi-component 1 at these two adjacent marking lines A16 is too thin.

[0109] It is necessary to compare and judge the distance e2 after compression molding and the distance e3 after vulcanization of each group of two adjacent marking lines A16 one by one.

[0110] The specific method for comparing the change in the distance e2 between two adjacent marking lines B17 after compression molding and the distance e3 between these two adjacent marking lines B17 after vulcanization to determine whether the thickness of the sidewall semi-component 2 is reasonable is as follows:

[0111] If the distance f2 between two adjacent marking lines B17 after compression molding is equal to the distance f3 between these two adjacent marking lines B17 after vulcanization, that is, f2 = f3, then the thickness of the sidewall semi-component 2 at these two adjacent marking lines B17 is reasonable; if the distance f3 between two adjacent marking lines B17 after vulcanization is greater than the distance f2 between these two adjacent marking lines B17 after compression molding, that is, f3 > f2, then the thickness of the sidewall semi-component 2 at these two adjacent marking lines B17 is too thick; conversely, if f3 < f2, then the thickness of the sidewall semi-component 2 at these two adjacent marking lines B17 is too thin.

[0112] It is necessary to compare and judge one by one the distance f2 between each group of two adjacent marking lines B17 after pressing and forming and the distance f3 after vulcanization.

[0113] The specific method to judge whether the sidewall rubber 6 material has obvious flow according to the curvature of the curve of the mark line C18 after vulcanization is as follows:

[0114] Observe the changes of the marking line C18 after vulcanization on both sidewalls 10 of the finished tire respectively;

[0115] If the curvature of the marking line C18 after vulcanization is greater than or equal to 2000 mm and the line segment of the marking line C18 is continuous and not misplaced, then there is no obvious flow of the sidewall rubber 6; if the curvature of the marking line C18 after vulcanization is less than 2000 mm or the line segment of the marking line C18 is discontinuous or discontinuous, then there is obvious flow of the sidewall rubber 6.

[0116] The specific method for judging whether the shoulder width of the tread half component 1 is reasonable based on the distances g1 and g2 between the post-vulcanization marking line D19 and the shoulder 11 of the finished tire on the same side is as follows:

[0117] Compare and judge the vulcanized marking lines D19 on the two shoulders 11 of the finished tire respectively;

[0118] If the vulcanized marking lines D19 on both shoulders 11 of the finished tire are respectively located on the shoulders 11 of the finished tire, the shoulder width of the tread half component 1 is reasonable;

[0119] If either of the two marking lines D19 is located on the tire side surface 20 of the finished tire after vulcanization, the shoulder width of the tread half component 1 is too wide.

[0120] There are two distribution scenarios for the marking line D19: 1. One of the left marking line D19 or the right marking line D19 is located on the tire side 20 of the finished tire; 2. Both the left marking line D19 and the right marking line D19 are located on the same side of the tire side 20. Both scenarios fall within the applicable scope of the above-mentioned determination method.

[0121] If either of the two marking lines D19 is located on the tire running surface 21 of the finished tire after vulcanization, the shoulder width of the tread half member 1 is too narrow.

[0122] There are two distribution scenarios for the marking line D19: 1. One of the left marking line D19 or the right marking line D19 is located on the tire running surface 21 of the finished tire; 2. Both the left marking line D19 and the right marking line D19 are located on the same side of the tire running surface 21. Both scenarios fall within the applicable scope of the above-mentioned determination method.

[0123] It should be noted that if one of the two marking lines D19 is located on the sidewall 10 of the finished tire after vulcanization and the other is located on the tread 12 of the finished tire, this situation is an error in the vulcanization process and is not within the scope of discussion of the present invention.

[0124] The present invention also provides an adjustment method, which is based on the above-mentioned tire rubber material flow measurement method and includes the following steps:

[0125] If the spacing e2 between two adjacent marking lines A16 after compression molding is equal to the spacing e3 between the two adjacent marking lines A16 after vulcanization, that is, e2=e3, then the thickness of the tread 12 at the two adjacent marking lines A16 is reasonable, and the thickness of the tread half component 1 at the two adjacent marking lines A16 does not need to be adjusted; if the spacing e3 between the two adjacent marking lines A16 after vulcanization is not equal to the spacing e2 between the two adjacent marking lines A16 after compression molding, that is, e3≠e2, then the thickness of the tread 12 at the two adjacent marking lines A16 is too thick or too thin, and the thickness of the tread half component 1 at the two adjacent marking lines A16 needs to be adjusted. The adjustment amount x is calculated according to the following formula:

[0126]

[0127] Wherein, a1 is the thickness of the tread half component 1 at the two adjacent marking lines A16 before pressing and forming, e2 is the distance between the two adjacent marking lines A16 after pressing and forming, and e3 is the distance between the two adjacent marking lines A16 after vulcanization;

[0128] After adjustment, the thickness a2 of the tread half component 1 at the two adjacent marking lines A16 is calculated according to the following formula:

[0129] a2=x+a1

[0130] In order to understand the above formula more clearly, the following calculation example is provided:

[0131] It is known that the thickness a1 of the tread half component 1 at the two adjacent marking lines A16 before pressing is 15 mm. The distance e2 between the two adjacent marking lines A16 after pressing is measured to be 22 mm. The distance e3 between the two adjacent marking lines A16 after vulcanization is measured to be 23 mm. The adjustment amount x is calculated according to the above formula:

[0132]

[0133] After adjustment, the thickness a2 of the tread half member 1 at the two adjacent marking lines A16 is:

[0134] a2=x+a1=-0.65+15=14.35;

[0135] If the spacing f2 between two adjacent marking lines B17 after compression molding is equal to the spacing f3 between the two adjacent marking lines B17 after vulcanization, that is, f2=f3, then the thickness of the sidewall 10 at the two adjacent marking lines B17 is reasonable, and the thickness of the sidewall half component 2 at the two adjacent marking lines B17 does not need to be adjusted; if the spacing f3 between two adjacent marking lines B17 after vulcanization is not equal to the spacing f2 between the two adjacent marking lines B17 after compression molding, that is, f3≠f2, then the thickness of the sidewall 10 at the two adjacent marking lines B17 is too thick or too thin, and the thickness of the sidewall half component 2 at the two adjacent marking lines B17 needs to be adjusted. The adjustment amount x is calculated according to the following formula:

[0136]

[0137] Wherein, b1 is the thickness of the sidewall half component 2 at the two adjacent marking lines B17 before pressing and forming, f2 is the distance between the two adjacent marking lines B17 after pressing and forming, and f3 is the distance between the two adjacent marking lines B17 after vulcanization;

[0138] After adjustment, the thickness b2 of the sidewall half member 2 at the two adjacent marking lines B17 is calculated according to the following formula:

[0139] b2=x+b1

[0140] In order to understand the above formula more clearly, the following calculation example is provided:

[0141] It is known that the thickness b1 of the sidewall half component 2 at the two adjacent marking lines B17 before pressing is 7 mm. The distance f2 between the two adjacent marking lines B17 after pressing is measured to be 14 mm. The distance f3 between the two adjacent marking lines B17 after vulcanization is measured to be 15 mm. The adjustment amount y is calculated according to the above formula:

[0142]

[0143] After adjustment, the thickness b2 of the sidewall half member 2 at the two adjacent marking lines B17 is:

[0144] b2=y+b1=-0.46+7=6.54;

[0145] If the vulcanized marking lines D19 on both shoulders 11 of the finished tire are respectively located on the shoulders 11 of the finished tire, the shoulder width of the tread half component 1 is reasonable and the shoulder width of the tread half component 1 does not need to be adjusted;

[0146] If either of the two marking lines D19 is located on the tire side 20 of the finished tire after vulcanization, the shoulder width of the tread half component 1 is too wide. The shoulder width d2 of the tread half component 1 after adjustment is calculated according to the following formula:

[0147]

[0148] Wherein, d1 is the shoulder width of the front tread half component 1 after compression molding, g1 is the distance between the left marking line D19 and the left shoulder 11, and g2 is the distance between the right marking line D19 and the right shoulder 11;

[0149] In order to understand the above formula more clearly, the following calculation example is provided:

[0150] Given that the shoulder width d1 of the tread half component 1 before pressing is 190 mm, and the measured distance g1 between the left marking line D19 and the left shoulder 11 after pressing is 5 mm, and the measured distance g2 between the right marking line D19 and the right shoulder 11 after pressing is 6 mm, the adjusted shoulder width d2 of the tread half component 1 is calculated according to the above formula:

[0151]

[0152] If either of the two marking lines D19 is located on the tire running surface 21 of the finished tire after vulcanization, the shoulder width of the tread half component 1 is too narrow. The shoulder width d2 of the tread half component 1 after adjustment is calculated according to the following formula:

[0153]

[0154] Wherein, d1 is the shoulder width of the front tread half component 1 after compression molding, g1 is the distance between the left marking line D19 and the left shoulder 11, and g2 is the distance between the right marking line D19 and the right shoulder 11;

[0155] In order to understand the above formula more clearly, the following calculation example is provided:

[0156] Given that the shoulder width d1 of the tread half component 1 before pressing is 184 mm, and the measured distance g1 between the left marking line D19 and the left shoulder 11 after pressing is 3 mm, and the measured distance g2 between the right marking line D19 and the right shoulder 11 after pressing is 4 mm, the adjusted shoulder width d2 of the tread half component 1 is calculated according to the above formula:

[0157]

[0158] Wherein, d1 is the shoulder width of the tread half component 1 before lamination, g1 is the distance between the left marking line D19 and the left shoulder 11 , and g2 is the distance between the right marking line D19 and the right shoulder 11 .

[0159] The embodiments described above are merely descriptions of preferred implementations of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the scope of protection determined by the claims of the present invention.

Claims

1. A method for measuring tire rubber flow, characterized in that: The following steps are involved: S1. Make several equally spaced marking lines A on the tread half and several equally spaced marking lines B on the sidewall half. S2, pressing the cushion rubber and the tread half component and the sidewall half component obtained in step S1 to obtain a tire blank, and measuring the distance between each adjacent marking line A and the distance between each adjacent marking line B after the pressing; S3. Make an oblique marking line C on the sidewall of the tire and a marking line D along the two shoulder ridges of the tire. S4, vulcanizing the tire blank obtained in step S3 to obtain a finished tire; S5. Measure the distance between each two adjacent marking lines A after vulcanization, measure the distance between each two adjacent marking lines B after vulcanization, the curvature of the marking line C after vulcanization and observe the continuity of the line segment, and the distance between the marking line D after vulcanization and the shoulder of the finished tire on the same side; S6. Determine whether the thickness of the tread half component is reasonable by comparing the distance between the two adjacent marking lines A after pressing and molding and the change in the distance between the two adjacent marking lines A after vulcanization. Determine whether the thickness of the sidewall half component is reasonable by comparing the distance between the two adjacent marking lines B after pressing and molding and the change in the distance between the two adjacent marking lines B after vulcanization. Determine whether the sidewall rubber flows significantly based on the curvature and line segment continuity of the marking line C after vulcanization. Determine whether the shoulder width of the tread half component is reasonable based on the distance between the marking line D after vulcanization and the shoulder of the finished tire on the same side.

2. The method for measuring tire rubber flow according to claim 1, wherein: The marking line A in step S1 is marked as follows: Starting from the center axis of the tread half component, make several equally spaced marking lines A toward both sides of the tread half component in the width direction, until the distance between the outermost marking line A and the two side edges of the tread half component is less than the distance between two adjacent marking lines A.

3. The method for measuring tire rubber flow according to claim 1, wherein: The marking line B in step S1 is marked as follows: Starting from the sidewall rubber centerline of the sidewall half component, a first calibration area and a second calibration area of ​​length h are respectively taken on both sides of the sidewall half component in the width direction, where h = 2H / 3; wherein H is half of the sidewall rubber width; Starting from the sidewall rubber centerline of the sidewall half component, make several equally spaced marking lines B in the first marking area and the second marking area along the width direction of the sidewall half component until the distance between the two outermost marking lines B and the outer edges of the first marking area and the second marking area respectively is less than the distance between two adjacent marking lines B.

4. The method for measuring tire rubber flow according to claim 1, wherein: The marking line C in step S3 is marked as follows: On the sidewall, make a marking line C from the shoulder to the heel of the tire blank at an angle of 45° to the radial direction of the tire blank.

5. The method for measuring tire rubber flow according to claim 1, wherein: The specific method for determining whether the thickness of the tread half component is reasonable by comparing the distance between the two adjacent marking lines A after compression molding and the change in the distance between the two adjacent marking lines A after vulcanization in step S6 is: If the distance between two adjacent marking lines A after compression molding is equal to the distance between the two adjacent marking lines A after vulcanization, the thickness of the tread half components at the two adjacent marking lines A is reasonable; If the distance between two adjacent marking lines A after vulcanization is greater than the distance between the two adjacent marking lines A after compression molding, the thickness of the tread half component at the two adjacent marking lines A is too thick; otherwise, the thickness of the tread half component at the two adjacent marking lines A is too thin.

6. The method for measuring tire rubber flow according to claim 1, wherein: The specific method for judging whether the thickness of the sidewall half component is reasonable by comparing the distance between the two adjacent marking lines B after compression molding and the change in the distance between the two adjacent marking lines B after vulcanization in step S6 is: If the distance between two adjacent marking lines B after compression molding is equal to the distance between the two adjacent marking lines B after vulcanization, the thickness of the sidewall half component at the two adjacent marking lines B is reasonable; If the distance between two adjacent marking lines B after vulcanization is greater than the distance between the two adjacent marking lines B after compression molding, the thickness of the sidewall half component at the two adjacent marking lines B is too thick; otherwise, the thickness of the sidewall half component at the two adjacent marking lines B is too thin.

7. The method for measuring tire rubber flow according to claim 1, wherein: The specific method for judging whether the sidewall rubber material has obvious flow according to the curvature of the curve of the mark line C after vulcanization in step S6 is: If the curvature of the marking line C after vulcanization is greater than or equal to 2000 mm and the line segment of the marking line C after vulcanization is continuous, there is no obvious flow of the sidewall rubber; If the curvature of the marking line C after vulcanization is less than 2000 mm or the line segment of the marking line C after vulcanization is discontinuous, there is obvious flow of the sidewall rubber.

8. The method for measuring tire rubber flow according to claim 1, wherein: The specific method for judging whether the shoulder width of the tread half component is reasonable based on the distance between the post-vulcanization marking line D and the shoulder of the finished tire on the same side in step S6 is: If both marking lines D after vulcanization are located on the shoulders of the finished tire, the shoulder width of the tread half component is reasonable; if either of the two marking lines D after vulcanization is located on the tire side of the finished tire, the shoulder width of the tread half component is too wide; if either of the two marking lines D after vulcanization is located on the tire running surface of the finished tire, the shoulder width of the tread half component is too narrow.

9. An adjustment method, characterized in that: The adjustment method is carried out on the basis of the tire rubber material flow measurement method according to any one of claims 1 to 8, and comprises the following steps: If the distance between two adjacent marking lines A after compression molding is not equal to the distance between the two adjacent marking lines A after vulcanization, the thickness of the tread half components at the two adjacent marking lines A needs to be adjusted. The adjustment amount x is calculated according to the following formula: Wherein, a1 is the thickness of the tread half component at the two adjacent marking lines A before pressing and forming, e2 is the distance between the two adjacent marking lines A after pressing and forming, and e3 is the distance between the two adjacent marking lines A after vulcanization; If the distance between two adjacent marking lines B after compression molding is not equal to the distance between the two adjacent marking lines B after vulcanization, the thickness of the sidewall half component at the two adjacent marking lines B needs to be adjusted. The adjustment amount y is calculated according to the following formula: Wherein, b1 is the thickness of the tread half component at the two adjacent marking lines B before pressing and forming, f2 is the distance between the two adjacent marking lines B after pressing and forming, and f3 is the distance between the two adjacent marking lines B after vulcanization; If either of the two marking lines D after vulcanization is located on the side of the finished tire, the shoulder width of the tread half needs to be adjusted. The shoulder width d2 of the tread half is calculated according to the following formula: If either of the two marking lines D after vulcanization is located on the running surface of the finished tire, the shoulder width of the tread half needs to be adjusted. The shoulder width d2 of the tread half is calculated according to the following formula: Wherein, d1 is the shoulder width of the front tread half component after compression molding, g1 is the distance between a marking line D and its shoulder on the same side, and g2 is the distance between another marking line D and its shoulder on the same side.

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