CN103075985A - Method and device for length measurement of belt ply - Google Patents
Method and device for length measurement of belt ply Download PDFInfo
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- CN103075985A CN103075985A CN2012105764262A CN201210576426A CN103075985A CN 103075985 A CN103075985 A CN 103075985A CN 2012105764262 A CN2012105764262 A CN 2012105764262A CN 201210576426 A CN201210576426 A CN 201210576426A CN 103075985 A CN103075985 A CN 103075985A
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Abstract
The invention discloses a method and device for length measurement of a belt ply. The method comprises the following steps of: when a head of the belt ply reaches a speed-reducing switch, reducing the transfer speed of a conveyer belt; when the head of the belt ply reaches a fixed length switch, recording an instantaneous position a when the head of the belt ply reaches, improving the transfer speed of the conveyer belt after end of the recording, and when a tail of the belt ply reaches the speed-reducing switch, reducing the transfer speed of the conveyer belt again; when the tail of the belt ply reaches the fixed length switch, recording an instantaneous position b when the tail of the belt ply reaches, and improving the transfer speed of the conveyer belt again after end of the recording; and computing the length of the belt ply according to the a and the b. The moment to cause the head of the belt ply to reach the speed-reducing switch is earlier than the moment to cause the head of the belt ply to reach the fixed length switch.
Description
Technical field
The present invention relates to tire manufacturing technology field, particularly belt length measurement method and device.
Background technology
Belt claims again supporting layer, rigid breaker and resistant strata, refers under the tread base of radial and bias belted tyre, along the material layer of circumferential line circumferencial direction banding carcass.
The starting material of belt are to roll up about continuous 100 meters.In actual production, the belt starting material of rolling become belt through after leading out, measure and cut (this process is called again fixed length).Then belt transmits to be attached to through conveying belt and carries out the head of belt and engaging of tail on the columniform drum (belt drum).Because there is magnet on the belt drum surface, there is steel wire the inside of belt, so belt can well be attached on the belt drum.Because the head of belt overlap joint occurs with engaging of tail or the gap all can affect the homogeneity of tire, dock with the tight of tail so will guarantee head, this just requires the length of belt and the girth strict conformance of belt drum.
Because the limitation of existing technique, the length of belt is difficult to the girth strict conformance of assurance and belt drum.Prior art is by double measurement, records the true length of belt.And then by slight stretching or shrink the tight docking that belt guarantees joint.Therefore, the true length that how to record belt becomes the tight key point of docking of the head of realizing belt and tail.
Position a when existing double measurement method, when the head that refers to the belt that transmits through conveying belt arrives the fixed length switch, fixed length switch notice PLC(programmable logic controller (PLC)) head of record belt arrives; When the afterbody of the belt that transmits through conveying belt arrives the fixed length switch, the position b when the fixed length switch can notify the afterbody of PLC record belt to arrive again, then the true length of belt is b-a.
The disadvantage of prior art is that accuracy and efficiency can not get both.Because the fixed length switch has a response time, within this response time, the transfer rate of conveying belt is faster, and the head position a of measured belt and the error of tail position b are larger.Therefore, the accuracy of the length of measured belt is just poorer.If but the transfer rate of reduction conveying belt will inevitably cause again the reduction of the efficient of measuring belt length.
Summary of the invention
In view of this, the object of the present invention is to provide belt length measurement method and device, to realize under the prerequisite that guarantees belt linear measure longimetry accuracy, improving the efficient of measuring belt length.
For achieving the above object, the invention provides following technical scheme:
A kind of belt length measurement method, based on the belt length-measuring appliance, described belt length-measuring appliance comprises speed reducing switch and fixed length switch at least, described method comprises:
When the head of belt arrives described speed reducing switch, reduce the transfer rate of conveying belt;
When the head of described belt arrives described fixed length switch, the instantaneous position a the when head that records described belt arrives, and improve the transfer rate of described conveying belt after the end of record (EOR);
When the afterbody of belt arrives described speed reducing switch, again reduce the transfer rate of described conveying belt;
When the afterbody of described belt arrives described fixed length switch, the instantaneous position b the when afterbody that records described belt arrives, and again improve the transfer rate of described conveying belt after the end of record (EOR);
Calculate the length of described belt according to described a and b;
The moment that the head of described belt arrives described speed reducing switch arrives the moment of described fixed length switch early than the head of described belt.
Preferably, the transfer rate of described reduction conveying belt specifically comprises: the transfer rate of described conveying belt is reduced to 5mm/s.
Preferably, the transfer rate of the described conveying belt of described raising specifically comprises: the transfer rate of described conveying belt is increased to 300mm/s.
Preferably, described speed reducing switch and described fixed length switch are being 1cm-5cm along the spacing on the described conveying belt direction of transfer.
Preferably, the described length of calculating described belt according to described a and b comprises: calculate the length of described belt according to formula L=b-a+c, described c is the constant of machine error compensation, and described L represents the length of described belt.
Preferably, described c value is 4mm-8mm.
Preferably, the described length of calculating described belt according to described a and b comprises: calculate the length of described belt according to formula L=b-a, described L represents the length of described belt.
A kind of belt length-measuring appliance comprises speed reducing switch, fixed length switch and programmable logic controller (PLC) PLC at least;
Described speed reducing switch is used for, and when the afterbody of the head of belt or belt arrives, notifies described PLC to reduce the transfer rate of conveying belt;
Described fixed length switch is used for, when the head of described belt arrives, instantaneous position a when the head of notifying described PLC to record described belt arrives, and after end of record (EOR), notify described PLC to improve the transfer rate of described conveying belt, and when the afterbody of described belt arrives, instantaneous position b when the afterbody of notifying described PLC to record described belt arrives, and after end of record (EOR), notify described PLC to improve the transfer rate of described conveying belt;
Described PLC is used for, when the afterbody of the head of belt or belt arrives described speed reducing switch, reduce the transfer rate of described conveying belt, when the head of belt arrives described fixed length switch, instantaneous position a when the head that records described belt arrives, and after end of record (EOR), improve the transfer rate of described conveying belt, and when the afterbody of belt arrives described fixed length switch, instantaneous position b when the afterbody that records described belt arrives, and after end of record (EOR), improve the transfer rate of described conveying belt, calculate at last the length of described belt according to described a and b;
The moment that the head of described belt arrives described speed reducing switch arrives the moment of described fixed length switch early than the head of described belt.
Preferably, the described length of calculating described belt according to described a and b comprises: calculate the length of described belt according to formula L=b-a+c, described c is the constant of machine error compensation, and described L represents the length of described belt.
Preferably, described c value is 4mm-8mm.
Can find out from above-mentioned technical scheme, in embodiments of the present invention, when the head of belt or afterbody arrive speed reducing switch, will reduce the transfer rate of conveying belt, so the head of belt or afterbody can be sent to the fixed length switch under the transfer rate of relative low speed.Because the transfer rate of conveying belt is relatively low, and the response time of fixed length switch is certain, the error of instantaneous position b when the instantaneous position a the when head of the belt that therefore records arrives or the afterbody of belt arrive is less, therefore can guarantee the accuracy with the length of the belt of b calculating according to a.Simultaneously, because after the instantaneous position the when instantaneous position the when head of record belt arrives and the afterbody of belt arrive finishes, the present invention the transfer rate of conveying belt will be improved, so can under the prerequisite that guarantees accuracy, improve the efficient of measuring belt length.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the belt length-measuring appliance that the embodiment of the invention provides;
Fig. 2 is the belt length measurement method process flow diagram that the embodiment of the invention provides;
Fig. 3 and Fig. 4 are that the belt length-measuring appliance that the embodiment of the invention provides realizes cutting schematic diagram;
Fig. 5 a is another process flow diagram of belt length measurement method that the embodiment of the invention provides;
Fig. 5 b is the another process flow diagram of belt length measurement method that the embodiment of the invention provides;
Fig. 6 is that the belt length-measuring appliance that provides of the embodiment of the invention is realized the another schematic diagram that cuts;
Fig. 7 a is the another process flow diagram of belt length measurement method that the embodiment of the invention provides;
Fig. 7 b is another process flow diagram of belt length measurement method that the embodiment of the invention provides.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
The present invention based on the belt length-measuring appliance as described in Figure 1, the belt length-measuring appliance comprises speed reducing switch 11 and fixed length switch 12 at least, wherein, speed reducing switch 11 and fixed length switch 12 can be 1cm-5cm along the spacing on the direction of transfer 10 of conveying belt.
S1: when the head 18 of belt arrives speed reducing switch 11, reduce the transfer rate of conveying belt 13;
In the specific implementation, speed reducing switch 11 can be optoelectronic switch.Optoelectronic switch changes variation or the open/close state variation that is converted into switching signal with the power of light between transmitting terminal and the receiving end.And when the head 18 of belt during through optoelectronic switch (speed reducing switch 11), can cause send out and receiving end between the power of light change, thereby the variation or the open/close state that produce switching signal change.
For the situation that changes open/close state, because speed reducing switch 11 can link to each other by communication cable with PLC, therefore the open/close state that PLC can intermittent scanning speed reducing switch 11 when the open/close state that scans speed reducing switch 11 as PLC changes, then sends deceleration instruction to servomotor 16.And servomotor 16 will reduce the transfer rate of conveying belt 13 behind the deceleration instruction that receives the PLC transmission.Also can think, speed reducing switch 11 is notified PLC's by the change of the on off state of self.
Change situation for switching signal, speed reducing switch 11 is notified PLC by the switching signal of output, when PLC changes in switching signal, sends deceleration instruction to servomotor 16, reduces the transfer rate of conveying belt 13 to make servomotor 16.
How many transfer rates as for conveying belt 13 need to be down to, and those skilled in the art can decide according to the response time of fixed length switch 12, for example, the transfer rate of conveying belt 13 can be reduced to 5mm/s, and therefore not to repeat here.
S2: when the head 18 of belt arrives fixed length switch 12, the instantaneous position a the when head 18 of record belt arrives, and improve the transfer rate of conveying belt 13 after the end of record (EOR);
Fixed length switch 12 is identical with the principle of speed reducing switch 11.Different is, when the head 18 of belt passes through fixed length switch 12, to trigger PLC according to the position that servomotor 16 feeds back, (servomotor can be measured the position of belt, and servomotor can be with the position feedback of belt to PLC simultaneously to obtain the position of belt 17.), PLC will send the speed-raising instruction to servomotor 16 after end of record (EOR) simultaneously.And receive the speed-raising instruction of PLC transmission when servomotor 16 after, then can improve the transfer rate of conveying belt 13.This area can be designed transfer rate according to actual needs need to be increased to what, for example, the transfer rate of conveying belt 13 can be increased to 300mm/s, does not also give unnecessary details at this.
Therefore, when the head 18 of belt during through fixed length switch 12, the instantaneous position a the when head 18 that triggers PLC record belt is arrived, and after end of record (EOR), PLC sends the transfer rate that the speed-raising instruction improves conveying belt.S3: when the afterbody 19 of belt arrives speed reducing switch 11, again reduce the transfer rate of conveying belt 13;
The implementation of step S3 and step S1 is similar, does not repeat them here.
S4: when the afterbody 19 of belt arrives fixed length switch 12, the instantaneous position b the when afterbody 19 of record belt arrives, and again improve the transfer rate of conveying belt 13 after the end of record (EOR).
The implementation of step S4 and step S2 is similar, does not repeat them here.
S5: according to the length of a and b calculating belt 17.
Concrete, can calculate according to formula L=b-a the length L of belt 17; Certainly in order to improve the accuracy of calculating belt 17 length, also can calculate according to formula L=b-a+c the length L of belt 17, wherein c is the constant of machine error compensation.Because the error of different belt length-measuring appliances is different, so the c value can be 4mm-8mm.
Therefore, in the above-described embodiments, when the afterbody 19 of the head 18 of belt or belt arrives speed reducing switch 11, will reduce the transfer rate of conveying belt 13, so the head 18 of belt 17 or afterbody 19 can be sent to fixed length switch 12 under the transfer rate of relative low speed.Because the transfer rate of conveying belt 13 is relatively low, and the response time of fixed length switch is certain, therefore compared with prior art, the error of instantaneous position b when the instantaneous position a the when head 18 of the belt that records arrives and the afterbody of belt 19 arrive is less, therefore can guarantee the accuracy with the length of the belt 17 of b calculating according to a.Simultaneously, because after the instantaneous position the when instantaneous position the when head 18 of record belt arrives and the afterbody 19 of belt arrive finishes, the present invention the transmission degree of conveying belt 13 will be improved, so can under the prerequisite that guarantees accuracy, improve the efficient of measuring belt 14 length.
After the length that records belt 14, PLC can calculate the speeds match coefficient of belt drum and conveying belt 13 automatically, reaches the tight docking that guarantees the belt joint by slight stretching or contraction belt 14.Girth such as belt drum is 1000mm, if the length of belt 14 is 1000mm just, then with the speed ratio of 1:1, realizes the tight docking of belt 14 joints; If belt length is 998mm, then with the speed ratio of 1:0.998, realize the tight docking of belt 14 joints.
Except being used for double measurement, said method can also be realized cutting belt starting material 14 by improving.Concrete have a following implementation.
Mode one, suppose that the length of belt is 1000mm in theory, then as shown in Figure 3, in actual production, can cutting means 15 be set to equate with the length (1000mm) of belt with distance between the speed reducing switch 11.
Like this when belt starting material 14(also be the head of belt) when arriving speed reducing switch 11, speed reducing switch 11 is notified PLC by the mode of addressing before this paper, PLC is except sending deceleration instruction to the servomotor 16, also send and cut instruction to cutting means 15, finish cutting belt starting material 14 by cutting means 15.Situation after cutting sees also Fig. 4: after cutting, the afterbody 19 of belt 17 forms.
Perhaps, also can be designed at belt starting material 14(also is the head of belt) when arriving fixed length switch 12, PLC is except sending the speed-raising instruction to the servomotor 16, also send simultaneously and cut instruction and cut to cutting means 15, at this moment, can design distance between cutting means 15 and the fixed length switch 12 and be set to equal in length with belt.
Accordingly, referring to Fig. 5 a, said method also can comprise the steps:
S6, when the head of belt arrives speed reducing switch, cut out the afterbody of belt.
Perhaps, referring to Fig. 5 b, said method also can comprise the steps:
S7, when the head of belt arrives the fixed length switch, cut out the afterbody of belt.
Mode two, suppose that the length of belt is 1500mm in theory, then as shown in Figure 6, in actual production, can cutting means 15 and speed reducing switch 11 between distance be set to 1000mm.Like this when belt starting material 14(also be the head of belt) when arriving speed reducing switch 11, speed reducing switch 11 is notified PLC by the mode of addressing before this paper, PLC is except sending deceleration instruction, also sending controling instruction makes servomotor 16 control conveying belt 13 forward 500mm to servomotor 16 again.When servomotor 16 control conveying belt 13 finish forward 500mm after, send to feedback signal of PLC.After PLC receives feedback signal, send and cut instruction to cutting means 15, finish cutting belt starting material 14 by cutting means 15.In like manner, after cutting, the afterbody 19 of belt 17 forms.
It will be appreciated by persons skilled in the art that between cutting means 15 and the speed reducing switch 11 apart from m1, and all can adjusting apart from n1 of forwarding of servomotor 16 control conveying belt 13, as long as satisfy m1 and n1 with the length L that equals belt.
Certainly, also can be designed at belt starting material 14(also is the head of belt) when arriving fixed length switch 12, the PLC sending controling instruction makes servomotor 16 control conveying belt 13 forward 500mm to servomotor 16 again.When servomotor 16 control conveying belt 13 finish forward 500mm after, send to feedback signal of PLC.After PLC receives feedback signal, send and cut instruction to cutting means 15, finish cutting belt starting material 14 by cutting means 15.In like manner, after cutting, the afterbody 19 of belt 17 forms.In addition, it will be understood by those skilled in the art that, between cutting means 15 and the fixed length switch 12 apart from m2, and all can adjusting apart from n2 of forwarding of servomotor 16 control conveying belt 13, as long as satisfy m2 and n2 with the length L that equals belt.
Accordingly, referring to Fig. 7 a, said method also can comprise the steps:
S8, when the head of belt arrives speed reducing switch, control cuts out the afterbody of belt.
Above-mentioned " control cuts out the afterbody of belt " can specifically comprise: make servomotor control conveying belt 13 forward the afterbody that cuts out belt behind the predeterminable range n1.
Perhaps, referring to Fig. 7 b, said method also can comprise the steps:
S9, when the head of belt arrives the fixed length switch, control cuts out the afterbody of belt.
Above-mentioned " control cuts out the afterbody of belt " can specifically comprise: make servomotor control conveying belt 13 forward the afterbody that cuts out belt behind the predeterminable range n2.
Corresponding with it, the embodiment of the invention also provides the belt length-measuring appliance, can realize improving the efficient of measuring belt length under the prerequisite that guarantees belt linear measure longimetry accuracy.
A kind of structure of above-mentioned belt length-measuring appliance is please still referring to Fig. 1, and it comprises speed reducing switch 11, fixed length switch 12 and length computation module (not shown in figure 1) at least.Speed reducing switch 11 and fixed length switch 12 can be 1cm-5cm along the spacing on the direction of transfer 10 of conveying belt, and the moment that the installation site of speed reducing switch 11 and fixed length switch 12 makes the head 18 of belt arrive speed reducing switch 11 arrives the moment of fixed length switch 12 early than the head 18 of belt.Wherein, speed reducing switch 11 is used for when the afterbody 19 of the head 18 of belt or belt arrives, and notice PLC reduces the transfer rate of conveying belt 13; Concrete introduction about speed reducing switch 11 can be referring to the record of this paper abovementioned steps S1, and therefore not to repeat here.
More specifically, PLC can comprise the fast module of increase and decrease, and the fast module of speed reducing switch 11 notice increases and decreases then increases and decreases fast module and sends deceleration instruction to servomotor 16.And servomotor 16 will reduce the transfer rate of conveying belt 13 behind the deceleration instruction that receives the PLC transmission.
More specifically, PLC also can comprise logging modle.When the head 18 of belt arrives, the logging modle of PLC is notified in the variation that fixed length switch 12 can be by open/close state or the variation of switching signal, instantaneous position a when being arrived by the head 18 of the logging modle of PLC record belt, after record is finished simultaneously, send the speed-raising instruction to servomotor 16 by the fast module of increase and decrease, receive the speed-raising instruction of PLC transmission when servomotor 16 after, then can improve the transfer rate of conveying belt 13; Similar, when the afterbody 19 of belt arrives, the logging modle of PLC is notified in the variation that the fixed length switch can be by open/close state or the variation of switching signal, instantaneous position b when being arrived by the afterbody 19 of logging modle record belt, after record is finished, send the speed-raising instruction to servomotor 16 by the fast module of increase and decrease.At last, PLC calculates the length of belt 17 according to a and b.
Calculate the length of belt 17 as for how according to a and b, can be referring to the record of this paper abovementioned steps S5 part, therefore not to repeat here.
The above only is preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. a belt length measurement method is characterized in that, based on the belt length-measuring appliance, described belt length-measuring appliance comprises speed reducing switch and fixed length switch at least, and described method comprises:
When the head of belt arrives described speed reducing switch, reduce the transfer rate of conveying belt;
When the head of described belt arrives described fixed length switch, the instantaneous position a the when head that records described belt arrives, and improve the transfer rate of described conveying belt after the end of record (EOR);
When the afterbody of belt arrives described speed reducing switch, again reduce the transfer rate of described conveying belt;
When the afterbody of described belt arrives described fixed length switch, the instantaneous position b the when afterbody that records described belt arrives, and again improve the transfer rate of described conveying belt after the end of record (EOR);
Calculate the length of described belt according to described a and b;
The moment that the head of described belt arrives described speed reducing switch arrives the moment of described fixed length switch early than the head of described belt.
2. method according to claim 1 is characterized in that, the transfer rate of described reduction conveying belt specifically comprises: the transfer rate of described conveying belt is reduced to 5mm/s.
3. method according to claim 1 is characterized in that, the transfer rate of the described conveying belt of described raising specifically comprises: the transfer rate of described conveying belt is increased to 300mm/s.
4. method according to claim 1 is characterized in that, described speed reducing switch and described fixed length switch are being 1cm-5cm along the spacing on the described conveying belt direction of transfer.
5. method according to claim 1, it is characterized in that, the described length of calculating described belt according to described a and b comprises: calculate the length of described belt according to formula L=b-a+c, described c is the constant of machine error compensation, and described L represents the length of described belt.
6. method according to claim 5 is characterized in that, described c value is 4mm-8mm.
7. method according to claim 1 is characterized in that, the described length of calculating described belt according to described a and b comprises: calculate the length of described belt according to formula L=b-a, described L represents the length of described belt.
8. a belt length-measuring appliance is characterized in that, comprises at least speed reducing switch, fixed length switch and programmable logic controller (PLC) PLC;
Described speed reducing switch is used for, and when the afterbody of the head of belt or belt arrives, notifies described PLC to reduce the transfer rate of conveying belt;
Described fixed length switch is used for, when the head of described belt arrives, instantaneous position a when the head of notifying described PLC to record described belt arrives, and after end of record (EOR), notify described PLC to improve the transfer rate of described conveying belt, and when the afterbody of described belt arrives, instantaneous position b when the afterbody of notifying described PLC to record described belt arrives, and after end of record (EOR), notify described PLC to improve the transfer rate of described conveying belt;
Described PLC is used for, when the afterbody of the head of belt or belt arrives described speed reducing switch, reduce the transfer rate of described conveying belt, when the head of belt arrives described fixed length switch, instantaneous position a when the head that records described belt arrives, and after end of record (EOR), improve the transfer rate of described conveying belt, and when the afterbody of belt arrives described fixed length switch, instantaneous position b when the afterbody that records described belt arrives, and after end of record (EOR), improve the transfer rate of described conveying belt, calculate at last the length of described belt according to described a and b;
The moment that the head of described belt arrives described speed reducing switch arrives the moment of described fixed length switch early than the head of described belt.
9. device according to claim 8, it is characterized in that, the described length of calculating described belt according to described a and b comprises: calculate the length of described belt according to formula L=b-a+c, described c is the constant of machine error compensation, and described L represents the length of described belt.
10. device according to claim 9 is characterized in that, described c value is 4mm-8mm.
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| CN201210576426.2A CN103075985B (en) | 2012-12-25 | 2012-12-25 | Belt length measurement method and device |
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| CN201210576426.2A CN103075985B (en) | 2012-12-25 | 2012-12-25 | Belt length measurement method and device |
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| CN103075985A true CN103075985A (en) | 2013-05-01 |
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| CN104776803A (en) * | 2015-04-13 | 2015-07-15 | 赛轮金宇集团股份有限公司 | Automatic length measuring device for tire treads and monitoring method of automatic length measuring device |
| CN105115463A (en) * | 2015-09-25 | 2015-12-02 | 中国重型机械研究院股份公司 | Non-contact on-line bar length measuring device and method |
| CN105387831A (en) * | 2015-12-29 | 2016-03-09 | 浦林成山（山东）轮胎有限公司 | Device for detecting length of belted layer of tire |
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| CN104776803B (en) * | 2015-04-13 | 2017-07-14 | 赛轮金宇集团股份有限公司 | A kind of tyre surface examines growth device and its monitoring method automatically |
| CN105115463A (en) * | 2015-09-25 | 2015-12-02 | 中国重型机械研究院股份公司 | Non-contact on-line bar length measuring device and method |
| CN105387831A (en) * | 2015-12-29 | 2016-03-09 | 浦林成山（山东）轮胎有限公司 | Device for detecting length of belted layer of tire |
| CN105387831B (en) * | 2015-12-29 | 2017-10-20 | 浦林成山（山东）轮胎有限公司 | A kind of tire belt device for detecting length |
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|---|---|
| CN103075985B (en) | 2015-09-23 |
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Address after: Kwong Hing Road Economic Development Zone 257399 Shandong city of Dongying province Guangrao County No. 9 Patentee after: Sailun (Dongying) Tyre Co., Ltd. Address before: Kwong Hing Road Economic Development Zone 257399 Shandong city of Dongying province Guangrao County No. 9 Patentee before: Shandong Jinyu Industrial Co., Ltd. |