CN114571766B - Method for dispersing joints of radial tires of passenger cars - Google Patents
Method for dispersing joints of radial tires of passenger cars Download PDFInfo
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- CN114571766B CN114571766B CN202210483425.7A CN202210483425A CN114571766B CN 114571766 B CN114571766 B CN 114571766B CN 202210483425 A CN202210483425 A CN 202210483425A CN 114571766 B CN114571766 B CN 114571766B
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- 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)
- B29D30/38—Textile inserts, e.g. cord or canvas layers, for tyres; Treatment of inserts prior to building the tyre
- B29D30/44—Stretching or treating the layers before application on the drum
Abstract
The invention discloses a method for dispersing joints of radial tires of cars, which adopts the technical scheme that the method comprises the following steps: s01, determining positions of a ply material joint and a forming joint; s02, determining the position of the forming joint: calculating the angle between the adjacent joints after the joint is attached into a ring shape according to the determined positions of the material joints and the forming joints, wherein the adjacent joints comprise the forming joints and the material joints, selecting two adjacent joints with the largest angle, and determining the middle position of the two adjacent joints as the position of the forming joint of the semi-finished product part at the next non-arranged position; s03, determining the positions of subsequent joints, and repeating the step S02 until the positions of all the semi-finished product part forming joints are determined; the positions of the forming joints of the subsequent semi-finished parts are determined by the positions of the material joints and the forming joints of the ply, and the uniform dispersion of the material joints and the uniform dispersion of the forming joints are realized at the same time.
Description
Technical Field
The invention relates to the technical field of tire joint dispersion, in particular to a method for dispersing joints of radial tires of passenger cars.
Background
With the development of social economy, the radial ply tire is required to continuously meet the requirements of people on comfort and operability on the basis of meeting the basic safety performance of automobiles. The dynamic and static balance and uniformity of the tire are important factors influencing the comfort and the operability, and the reasonable distribution of the positions of joints of various parts in a forming process is an important step for ensuring the good uniformity and the dynamic and static balance of the tire in the tire production process.
The joints of the tire are mainly divided into a material joint and a forming joint, the material joint is a splicing joint in the production process of each part of the tire, the forming joint is a joint generated by bonding each part into a ring component in the forming process, the joints of the tire cannot be avoided in the production process, so that ideal uniformity cannot be realized in the tire manufacturing process, and the non-uniformity and dynamic-static imbalance are controlled in a range as small as possible only through various ways.
In the existing research, the problem of uniform dispersion of the forming joints is mostly solved, the uniform dispersion of the material joints is not considered, and each semi-finished product part of the tire comprises: tread, belt, cap strip, ply, innerliner, sidewall, bead, support compound, etc., where most of the semifinished parts have no or little effect on tire performance, but the ply material joint has a greater effect on tire uniformity and balance, it is desirable to provide a joint dispersion method that takes into account both the material joint and the molded joint are uniformly dispersed.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a joint dispersing method of a radial tire of a passenger car, which determines the position of a forming joint of a subsequent semi-finished product part through the positions of a material joint and a forming joint of a cord fabric layer and realizes the uniform dispersion of the material joint and the uniform dispersion of the forming joint.
In order to achieve the purpose, the invention provides the following technical scheme: a method for dispersing joints of radial tires of passenger cars comprises the following steps:
s01, determining positions of a ply material joint and a forming joint;
s02, determining the position of the forming joint: calculating the angle between the adjacent joints after the joint is attached into a ring shape according to the determined positions of the material joints and the forming joints, wherein the adjacent joints comprise the forming joints and the material joints, selecting two adjacent joints with the largest angle, and determining the middle position of the two adjacent joints as the position of the forming joint of the semi-finished product part at the next non-arranged position;
s03, determining the positions of subsequent joints, and repeating the step S02 until the positions of all the semi-finished product part forming joints are determined;
when the ply is one layer, the following steps are further included between the step S02 and the step S01:
s011, determining whether a material joint exists in a cord fabric layer, if so, executing a step S02, otherwise, executing a step S012;
s012, determining that the position opposite to the annular back cord fabric forming joint is the position of the forming joint of the next semi-finished product part which is not arranged;
s013, randomly selecting the molding joint position of the half-product part in which the intermediate position of the two joints in the instantaneous needle direction or in the counterclockwise direction is the next non-arranged position, and then performing step S02;
when the ply is two plies, between step S02 and step S01, the step of determining the positions of the two plies is performed;
determining the positions of the two plies comprises the following steps:
s011, respectively determining the angles of two adjacent joints after two plies of cord fabric are adhered into a ring shape;
s012, simulating annular fitting of two cord fabric layers, simulating different fitting states of the two cord fabric layers, and in each fitting state, recording an angle between each joint of one cord fabric layer and a joint of the other adjacent cord fabric layer along the clockwise direction, and recording the minimum value;
s013, comparing the recorded minimum values, determining the maximum angle and recording the maximum angle as k;
s014, determining the positions of the two cord fabric layers, selecting the joint state of the cord fabric layers with one pair of k values, rotating one cord fabric layer by (k +1)/2-1 degrees, and determining the positions of the two cord fabric layers at the moment as the joint position of the cord fabric layers.
By adopting the technical scheme, the positions of the forming joints of the subsequent semi-finished product parts are determined through the positions of the material joints and the forming joints of the cord fabric layer, and the uniform dispersion of the material joints and the uniform dispersion of the forming joints are realized. Since the plies may have only form joints and no material joints, it is given here how the distribution of form joints should be carried out when the tire has only one ply and no material joints.
Through the simulation to two casing ply annular laminating modes, the mode that dispersion is the most even is as the position of final two casing plies for the dispersion of final material joint and shaping joint is more even.
The invention is further configured to: when the cord fabric layers are two layers, in the step S011, the two cord fabric layers are respectively recorded as a first cord fabric layer and a second cord fabric layer, the number of joints of the first cord fabric layer is recorded as m, and the formed joints are named as x 1 Each material joint is named x according to the clockwise direction 2 To x m ，x 1 To x m The angles to the latter joint are respectively denoted as a 1 To a m ；
The number of joints of the second ply is recorded as n, where the forming joint is designated y 1 The material joints are respectively named as y in the clockwise direction 2 To y n ，y 1 To y n To the latter jointRespectively marked as b 1 To b n 。
The invention is further configured to: when the cord fabric is two layers, in the step S011, when the cord fabric is in the unfolded state, the total length is recorded as L, and the distance between any one joint and the next joint is recorded as L x The angle between the joint and the latter joint after the ply layer is jointed into a ring is (L) x /L）*360°。
The invention is further configured to: when the ply is two-ply, the step S012 includes the steps of:
S0121、y 1 relative to x 1 After clockwise deflection by 1 degree, the angle between the other joints of the second cord fabric layer and the joints adjacent to the first cord fabric layer along the clockwise direction is respectively calculated and the minimum value is recorded as Q 11min ；
S0122、y 1 Relative to x 1 After the ply is deflected by 1 degree counterclockwise, the ply is taken as a simulated joint state of two plies, angles between other joints of the second ply and adjacent joints of the first ply along the clockwise direction are respectively calculated, and the minimum value of the angles is recorded as P 11min 。
The invention is further configured to: when the ply is two-ply, the step S012 further includes the steps of:
s0123, and step S0121 and x of step S0122 1 Are respectively changed into x 2 To x m Repeating the steps S0121 and S0122 to obtain Q 21min To Q m1min And P 21min To P m1min ；
S0124, and g y of step S0121, step S0122 and step S0123 1 Respectively changed to y 2 To y n Repeating the steps S0121 and S0122 to obtain Q 22min To Q mnmin And P 22min To P mnmin 。
Through adopting above-mentioned technical scheme, through adopting above-mentioned simulation mode, the position of two casing plies of definite that can be reasonable and quick.
The invention is further configured to: in step S01, the positions of the ply material joints are obtained by the forming machine detection device.
The invention is further configured to: the molding machine detection device comprises a first sensor which is arranged above the conveyor belt;
the second sensor is arranged above the conveyor belt and is lower than the first sensor in height;
the shielding plate is arranged above the conveyor belt and rotates up and down around an axis;
the roller is arranged below the shielding plate;
when the roller is directly contacted with the conveyor belt, the shielding plate only shields the second sensor, when the roller is pressed on a non-joint position on the cord fabric layer, the shielding plate simultaneously shields the first sensor and the second sensor, and when the roller is pressed on the joint position of the cord fabric layer, the shielding plate only shields the first sensor.
Through adopting above-mentioned technical scheme, press drive the shielding plate to shelter from the position that the ply connects can be calculated to the different effect of sheltering from of two sensors and the transfer rate of conveyer belt when different positions through the gyro wheel.
In summary, compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, the positions of the forming joints and the material joints of the cord fabric layer are used for determining the positions of the forming joints of the subsequent semi-finished product parts, and the uniform dispersion of the material joints and the uniform dispersion of the forming joints are realized;
2. in the invention, since the ply may only have the forming joints and no material joints, the dispersion of the forming joints is performed when the tire has only one ply and no material joints;
3. according to the invention, through simulating the annular attaching mode of the two cord fabric layers, the most uniform dispersion mode is used as the position of the final two cord fabric layers, so that the dispersion of the final material joint and the forming joint is more uniform;
4. by adopting the simulation mode, the positions of the two cord fabric layers can be reasonably and quickly determined;
5. according to the invention, the positions of the cord fabric layer joints can be calculated by driving the shielding plates to shield the two sensors with different shielding effects when the rollers are pressed at different positions and the conveying speed of the conveying belt.
Drawings
FIG. 1 is a schematic representation of an embodiment with the plies deployed;
FIG. 2 is a schematic view of the plies of the embodiment after being attached in a ring shape;
FIG. 3 is a schematic view of a detecting device of the molding machine according to the embodiment;
FIG. 4 is a diagram illustrating a specific structure of a sensor according to an embodiment.
In the figure: 1. a support frame; 2. a first fixing plate; 21. a connecting plate; 3. a first sensor; 4. a second sensor; 5. a shielding plate; 51. a support plate; 6. a roller; 7. a second fixing plate; 8. a signal transmitting terminal; 9. and a signal receiving end.
Detailed Description
In order to make the technical solutions of the present invention better understood, the following description of the technical solutions of the present invention with reference to the accompanying drawings of the present invention is made clearly and completely, and other similar embodiments obtained by a person of ordinary skill in the art without any creative effort based on the embodiments in the present application shall fall within the protection scope of the present application. In addition, directional terms such as "upper", "lower", "left", "right", etc. in the following embodiments are directions with reference to the drawings only, and thus, the directional terms are used for illustrating the present invention and not for limiting the present invention.
The invention is further described with reference to the drawings and the preferred embodiments.
Example (b): a method for dispersing joints of radial tires of passenger cars comprises the following steps:
s01, determining positions of a ply material joint and a forming joint;
s02, determining the position of the forming joint: calculating the angle between the adjacent joints after the joint is attached into a ring shape according to the determined positions of the material joints and the forming joints, wherein the adjacent joints comprise the forming joints and the material joints, selecting two adjacent joints with the largest angle, and determining the middle position of the two adjacent joints as the position of the forming joint of the semi-finished product part at the next non-arranged position;
and S03, determining the positions of the subsequent joints, and repeating the step S02 until the positions of all the semi-finished part forming joints are determined.
Firstly, determining the positions of a material joint and a forming joint of a ply layer, and then determining the positions of forming joints of subsequent semi-finished product parts which are not arranged, wherein the determined position of each forming joint of the semi-finished product parts which are not arranged is the middle position of two joints with the largest angle between the adjacent joints in the determined positions; after the positions of all the semi-finished product part forming joints which are not arranged are determined in sequence, the material joints and the forming joints are uniformly distributed, and the dynamic and static balance and uniformity of the tire are improved.
Specifically, when the ply is one layer, the following steps are further included between step S02 and step S01:
s011, determining whether a material joint exists in a cord fabric layer, if so, executing a step S02, otherwise, executing a step S012;
s012, determining that the position opposite to the annular back cord fabric forming joint is the position of the forming joint of the next semi-finished product part which is not arranged;
s013, randomly selecting the molding joint position of the half-product part in which the intermediate position of the two joints in the instantaneous needle direction or in the counterclockwise direction is the next non-arranged position, and then performing step S02.
Since there may be no material joint in the ply, and step S02 cannot be directly performed when there is no material joint, steps S011, S012, and S013 are performed before step S02, and after three joint positions are determined, step S02 is performed.
Specifically, when the ply is two plies, between step S02 and step S01, the step of determining the positions of the two plies is performed; when the two plies are two, firstly, the positions of the two plies are determined, and then the step S02 is carried out to determine the positions of the forming joints of the other semi-finished parts; the position of the two plies herein refers to the relative position between the two plies after the two plies are joined into an inner and outer loop, and can be understood as the positional relationship between the joints of the two plies.
Determining the positions of the two plies comprises the following steps:
s011, respectively determining the angles of two adjacent joints after two plies of cord fabric are adhered into a ring shape;
s012, simulating annular fitting of two cord fabric layers, simulating different fitting states of the two cord fabric layers, and in each fitting state, recording an angle between each joint of one cord fabric layer and a joint of the other adjacent cord fabric layer along the clockwise direction, and recording the minimum value;
s013, comparing the recorded minimum values, determining the maximum angle and recording the maximum angle as k;
s014, determining the positions of the two cord fabric layers, selecting the joint state of the cord fabric layers with one pair of k values, rotating one cord fabric layer by (k +1)/2-1 degrees, and determining the positions of the two cord fabric layers at the moment as the joint position of the cord fabric layers.
By simulating the annular fitting state of the two cord fabric layers, the fitting mode with the most uniform distribution of the material joints and the forming joints can be determined through comparison, and therefore the fitting positions of the two cord fabric layers are determined.
Specifically, in step S011, the two plies are respectively recorded as a first ply and a second ply, the number of joints of the first ply is recorded as m, and the formed joints are named as x 1 Each material joint is named x according to the clockwise direction 2 To x m ，x 1 To x m The angles to the latter joint are respectively denoted as a 1 To a m (ii) a An example of the designation and angular designation of the joints of the first ply is shown in FIGS. 1 and 2, with the number of joints of the second ply recorded as n, and with the shaped joint designated as y 1 The material joints are respectively named as y in the clockwise direction 2 To y n ，y 1 To y n The angles to the latter joint are respectively denoted by b 1 To b n 。
In step S011, when the ply is in the unfolded state, the total length is recorded as L, and the distance between any joint and the next joint is recorded as L x The product isThe angle between the joint and the latter joint after the cord fabric layer is jointed into a ring shape is (L) x /L）*360°。
Specifically, step S012 includes the steps of:
S0121、y 1 relative to x 1 After clockwise deflection by 1 degree, the angle between the other joints of the second cord fabric layer and the joints adjacent to the first cord fabric layer along the clockwise direction is respectively calculated and the minimum value is recorded as Q 11min ；
S0122、y 1 Relative to x 1 After the ply is deflected by 1 degree in the anticlockwise direction, the ply is used as a simulated joint state of two ply layers, angles between the other joints of the second ply layer and the joints adjacent to the first ply layer in the clockwise direction are respectively calculated, and the minimum value of the angles is recorded as P 11min 。
S0123, and step S0121 and x in step S0122 1 Respectively changed to x 2 To x m Repeating the steps S0121 and S0122 to obtain Q 21min To Q m1min And P 21min To P m1min ；
S0124, and g 0121, S0122 and y of S0123 1 Respectively changed to y 2 To y n Repeating the steps S0121 and S0122 to obtain Q 22min To Q mnmin And P 22min To P mnmin 。
In step S013, Q is compared 11min To Q mnmin And P 11min To P mnmin And determining the maximum value as k.
Specifically, in step S01, the position of the ply material splice is obtained by a forming machine detection device, specifically, referring to fig. 3 and fig. 4, the forming machine detection device includes a first sensor 3 disposed above the conveyor belt, a second sensor 4 disposed above the conveyor belt and lower than the first sensor 3 in height, a shielding plate 5 disposed above the conveyor belt and rotating up and down around an axis, and a roller 6 disposed below the shielding plate 5; when the roller 6 is in direct contact with the conveyor belt, the shielding plate 5 only shields the second sensor 4, when the roller 6 is pressed against the ply in the non-joint position, the shielding plate 5 simultaneously shields the first sensor 3 and the second sensor 4, and when the roller 6 is pressed against the ply joint position, the shielding plate 5 only shields the first sensor 3.
Starting timing when the shielding plate 5 shields the first sensor 3 and the second sensor 4 simultaneously until the timing is finished when the shielding plate 5 shields the first sensor 3 but does not shield the second sensor 4, and multiplying the conveying speed of the conveyor belt by time to obtain the distance from the material joint of the cord fabric layer to the conveying front end of the cord fabric layer, namely the distance from the material joint of the cord fabric layer to the forming joint; when the shielding plate 5 is changed from shielding only the second sensor 4 to shielding the first sensor 3 and the second sensor 4 simultaneously, the roller 6 is proved to be pressed at the end part of the curtain cloth, and the end part of the curtain cloth is a forming joint position when the curtain cloth is attached to form a ring shape; when the shutter 5 switches from simultaneously blocking the first sensor 3 and the second sensor 4 to blocking only the first sensor 3, it turns out that the roller 6 is pressed at the material joint, so that the distance between the material joint and the forming joint of the ply can be obtained by multiplying the conveying speed of the conveyor belt by the time.
Specifically, the detection device of the forming machine further comprises a support frame 1, and the support frame 1 is fixed on the conveyor belt frame body; the shielding plate 5 is rotatably connected to the support frame 1, and the shielding plate 5 is horizontal to the rotating axis of the support frame 1 and vertical to the conveying direction of the conveying belt; one end of the baffle plate 5 rotatably connected with the support frame 1 is fixedly connected with a support plate 51, and the roller 6 is rotatably connected to the bottom of the support plate 51; when the thickness of the contact object at the bottom of the roller 6 is different, the roller can drive the shielding plate 5 to rotate through the supporting plate 51.
The detection device of the forming machine further comprises a first fixing plate 2 and a second fixing plate 7, wherein the first fixing plate 2 is fixedly connected to the support frame 1, and the first fixing plate 2 and the second fixing plate 7 are fixedly connected together through a connecting plate 21; one end of the shielding plate 5, which is far away from the support frame 1, is a free end, and the free end is inserted between the first fixing plate 2 and the second fixing plate 7; the first sensor 3 and the second sensor 4 are both provided with two parts, one part is a signal transmitting end 8, and the other part is a signal receiving end 9, and the signal transmitting end 8 and the signal receiving end 9 are respectively fixed on the first fixing plate 2 and the second fixing plate 7, and when the free end of the shielding plate 5 is located between the signal transmitting end 8 and the signal receiving end 9, the signal transmitted by the signal transmitting end 8 cannot be received by the signal receiving end 9.
Specifically, the first sensor 3 and the second sensor 4 are both configured as infrared sensors, the signal transmitting end 8 is an infrared transmitter, and the signal receiving end 9 is an infrared receiver.
When the roller 6 is supported on the conveyor belt, the free end of the shielding plate 5 can only shield the second sensor 4, and when the roller 6 is supported at a position of a non-material joint on the cord fabric layer along with the conveying of the cord fabric layer, the height of the roller 6 is increased, so that the position of the free end of the shielding plate 5 is driven to be increased, and the first sensor 3 and the second sensor 4 are simultaneously shielded; the curtain is conveyed continuously, when the roller 6 is supported at the material joint position, the position of the shielding plate 5 is raised again, so that the free end of the shielding plate 5 is higher than the height of the second sensor 4, and the shielding plate 5 only shields the first sensor 3.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (6)
1. A method for dispersing joints of radial tires of passenger cars is characterized in that: the method comprises the following steps:
s01, determining positions of a ply material joint and a forming joint;
s02, determining the position of the forming joint: calculating the angle between the adjacent joints after the joint is attached into a ring shape according to the determined positions of the material joints and the forming joints, wherein the adjacent joints comprise the forming joints and the material joints, selecting two adjacent joints with the largest angle, and determining the middle position of the two adjacent joints as the position of the forming joint of the semi-finished product part at the next non-arranged position;
s03, determining the positions of subsequent joints, and repeating the step S02 until the positions of all the semi-finished product part forming joints are determined;
when the ply is one layer, the following steps are further included between the step S02 and the step S01:
s011, determining whether a material joint exists in a cord fabric layer, if so, executing a step S02, otherwise, executing a step S012;
s012, determining that the position opposite to the annular back cord fabric forming joint is the position of the forming joint of the next semi-finished product part which is not arranged;
s013, randomly selecting the forming joint position of the semi-manufactured part of which the middle position of the two joints in the instantaneous needle direction or in the anticlockwise direction is the next unordered position, and then executing the step S02;
when the ply is two plies, between step S02 and step S01, the step of determining the positions of the two plies is performed;
determining the positions of the two plies comprises the following steps:
s011, respectively determining the angles of two adjacent joints after two plies of cord fabric are adhered into a ring shape;
s012, simulating annular fitting of two cord fabric layers, simulating different fitting states of the two cord fabric layers, and in each fitting state, recording an angle between each joint of one cord fabric layer and a joint of the other adjacent cord fabric layer along the clockwise direction, and recording the minimum value;
s013, comparing the recorded minimum values, determining the maximum angle and recording the maximum angle as k;
s014, determining the positions of two cord fabric layers, selecting the joint state of one cord fabric layer by k values, rotating one cord fabric layer by (k +1)/2-1 degrees, and determining the positions of the two cord fabric layers as the joint position of the cord fabric layers;
when the cord fabric layers are two layers, in the step S011, the two cord fabric layers are respectively recorded as a first cord fabric layer and a second cord fabric layer, the number of joints of the first cord fabric layer is recorded as m, and the formed joints are named as x 1 Each material joint is named x according to the clockwise direction 2 To x m ，x 1 To x m The angles to the latter joint are respectively denoted as a 1 To a m ；
The number of joints of the second ply is recorded as n, where the forming joint is designated y 1 The material joints are respectively named as y in the clockwise direction 2 To y n ，y 1 To y n The angles to the latter joint are respectively denoted by b 1 To b n 。
2. The method for dispersing the joints of radial tires for passenger cars according to claim 1, wherein: when the cord fabric is two layers, in the step S011, when the cord fabric is in the unfolded state, the total length is recorded as L, and the distance between any one joint and the next joint is recorded as L x The angle between the joint and the latter joint after the ply layer is jointed into a ring is (L) x /L)*360°。
3. The method for dispersing the joints of radial tires for passenger cars according to claim 1, wherein: when the ply is two-ply, the step S012 includes the steps of:
S0121、y 1 relative to x 1 After clockwise deflection by 1 degree, the angle between the other joints of the second cord fabric layer and the joints adjacent to the first cord fabric layer along the clockwise direction is respectively calculated and the minimum value is recorded as Q 11min ；
S0122、y 1 Relative to x 1 After the ply is deflected by 1 degree in the anticlockwise direction, the ply is used as a simulated joint state of two ply layers, angles between the other joints of the second ply layer and the joints adjacent to the first ply layer in the clockwise direction are respectively calculated, and the minimum value of the angles is recorded as P 11min 。
4. The method for dispersing the joints of radial tires for passenger cars according to claim 3, wherein: when the ply is two-ply, the step S012 further includes the steps of:
s0123, and step S0121 and x in step S0122 1 Respectively changed to x 2 To x m Repeating the steps S0121 and S0122 to obtain Q 21min To Q m1min And P 21min To P m1min ；
S0124, and g 0121, S0122 and y of S0123 1 Respectively changed to y 2 To y n Repeating the steps S0121 and S0122 to obtain Q 22min To Q mnmin And P 22min To P mnmin 。
5. The method for dispersing the joints of radial tires for passenger cars according to claim 1, wherein: in step S01, the positions of the ply material joints are obtained by the forming machine detection device.
6. The method for dispersing the joints of radial tires for passenger cars according to claim 5, wherein: the molding machine detection device comprises a first sensor (3) arranged above the conveyor belt;
a second sensor (4) arranged above the conveyor belt and at a lower height than the first sensor (3);
a shielding plate (5) which is arranged above the conveyor belt and rotates up and down around an axis;
and a roller (6) disposed below the shielding plate (5);
when the roller (6) is directly contacted with the conveyor belt, the shielding plate (5) only shields the second sensor (4), when the roller (6) is pressed on the cord fabric layer at a non-joint position, the shielding plate (5) simultaneously shields the first sensor (3) and the second sensor (4), and when the roller (6) is pressed on the cord fabric layer at a joint position, the shielding plate (5) only shields the first sensor (3).
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| CN112477221B (en) * | 2020-11-09 | 2022-06-24 | 中国化工集团曙光橡胶工业研究设计院有限公司 | Method for preventing tire body cord fabric from cracking during radial aircraft tire forming |
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2022
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| US4733709A (en) * | 1986-07-25 | 1988-03-29 | General Tire, Inc. | Radial tire with a reinforced butt splice carcass ply and method of making |
| JP2007055464A (en) * | 2005-08-25 | 2007-03-08 | Bridgestone Corp | Ply for tire and tire using it |
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| WO2013046128A1 (en) * | 2011-09-30 | 2013-04-04 | Pirelli Tyre S.P.A. | A method of controlling building of a tyre |
| US20210178833A1 (en) * | 2019-12-13 | 2021-06-17 | Toyo Tire Corporation | Pneumatic tire and manufacturing method thereof |
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