CN112231843A - Method for establishing opening standard of tread extrusion die plate - Google Patents
Method for establishing opening standard of tread extrusion die plate Download PDFInfo
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- CN112231843A CN112231843A CN202011170483.1A CN202011170483A CN112231843A CN 112231843 A CN112231843 A CN 112231843A CN 202011170483 A CN202011170483 A CN 202011170483A CN 112231843 A CN112231843 A CN 112231843A
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- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000001125 extrusion Methods 0.000 title claims abstract description 22
- 239000000463 material Substances 0.000 claims abstract description 45
- 150000001875 compounds Chemical class 0.000 claims description 16
- 238000005520 cutting process Methods 0.000 claims description 3
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims description 3
- 238000007573 shrinkage measurement Methods 0.000 claims description 3
- 238000003801 milling Methods 0.000 claims description 2
- 238000012360 testing method Methods 0.000 abstract description 8
- 238000012797 qualification Methods 0.000 abstract description 7
- 239000003292 glue Substances 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000011087 paperboard Substances 0.000 description 3
- 238000004513 sizing Methods 0.000 description 3
- 101100136064 Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv) PE13 gene Proteins 0.000 description 1
- 101100029138 Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv) PE16 gene Proteins 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/15—Vehicle, aircraft or watercraft design
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/17—Mechanical parametric or variational design
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/86—Optimisation of rolling resistance, e.g. weight reduction
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- Pure & Applied Mathematics (AREA)
- Mathematical Optimization (AREA)
- Mathematical Analysis (AREA)
- Evolutionary Computation (AREA)
- General Engineering & Computer Science (AREA)
- Computational Mathematics (AREA)
- Automation & Control Theory (AREA)
- Aviation & Aerospace Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Tyre Moulding (AREA)
Abstract
The invention discloses a method for establishing a tread extrusion die plate opening standard, which comprises the following steps: pre-establishing a relation curve between the shrinkage rate of the tread rubber material and the opening rate of the die plate; measuring the shrinkage rate of the tread rubber material, obtaining the opening rate of the corresponding die plate according to a relation curve between the shrinkage rate of the tread rubber material and the opening rate of the die plate, and determining the width opening size of the die plate according to the opening rate of the die plate. The method for establishing the opening standard of the tire tread extrusion port plate can effectively improve the primary qualification rate of the opening of the tire tread extrusion port plate, reduce the amount of returned glue caused by a test plate, improve the trial production completion rate of a new product, improve the shrinkage condition of the tire tread after extrusion, improve the uniformity of the weight of the tire tread, effectively reduce the RFV mean value and further improve the comfort of the tire in the use process.
Description
Technical Field
The invention belongs to the field of rubber tire component generation, and particularly relates to a method for establishing a tire tread extrusion die plate opening standard.
Background
Tires are indispensable components for vehicles such as cars and trucks, and the performance of these vehicles is closely related to the characteristics of the tires. In the tire production process, each extrusion half part needs to be processed and produced corresponding to a single die plate, so that different die plates need to be designed.
At present, in a workshop tread extruding procedure, the yield of plate opening of a mouth plate is low, the primary yield is only 37%, and repeated mouth shape testing can cause the generation of a large amount of return glue, so that the plate opening efficiency of the mouth plate is low, the stock of the return glue is increased, and the trial production completion rate of new products is low. In addition, the opening rate of the mouth plate corresponds to that of all rubber materials, but the shrinkage rates of different rubber materials are different, so that the phenomenon that the extruded tire tread is not uniform in shrinkage in the use process is caused, the vertical fluctuation generated in the rotation of the tire is increased, the RFV mean value is increased, and the comfort of the tire in the use process is reduced.
Accordingly, further developments and improvements are still needed in the art.
Disclosure of Invention
In order to solve the above problems, a method for establishing a tire tread extrusion die opening standard is proposed to improve the first pass yield of the tire tread extrusion die opening, improve the shrinkage of the tire tread at the extrusion opening, improve the uniformity of the tire tread weight, and improve the comfort of the tire in the use process.
In order to achieve the purpose, the invention provides the following technical scheme:
a method for establishing a tread extrusion die opening standard comprises the following steps:
s1, pre-establishing a relation curve between the shrinkage rate of the tread rubber and the actual opening rate of the corresponding die plate;
s2, measuring the shrinkage rate of the tread rubber material and obtaining the opening rate of the corresponding die plate through the relation curve in the step S1;
and S3, determining the width opening size of the mouth plate according to the opening ratio of the mouth plate in the step S2.
Further, the width opening size of the mouth plate is equal to the opening ratio of the mouth plate and the standard size of the glue component.
Further, the step S1 specifically includes the following steps: measuring the shrinkage rate of various tread rubber materials, respectively calculating the initial opening rate of the mouth-shaped plate corresponding to each tread rubber material, designing the corresponding mouth-shaped plate according to the initial opening rate of each mouth-shaped plate, actually debugging each mouth-shaped plate at an extrusion line to obtain the opening rate data of each mouth-shaped plate, and establishing a relation curve between the shrinkage rate of each tread rubber material and the opening rate of the corresponding mouth-shaped plate.
Further, the initial opening ratio of the die is 1-shrinkage of the tread compound.
Further, the shrinkage rate measuring process of the tread compound is as follows: and (3) open-milling the tire tread rubber material on a calender to obtain a rubber sheet, cutting the rubber sheet with a fixed length, recording the initial length of the rubber sheet before shrinkage, placing the rubber sheet in talcum powder for 24 hours, measuring the length of the rubber sheet after shrinkage, and calculating the shrinkage rate of the tire tread rubber material according to the initial length of the rubber sheet and the length of the rubber material after shrinkage.
Further, the shrinkage rate of the tread rubber material is (initial length of the rubber sheet-length of the rubber sheet after shrinkage)/initial length of the rubber sheet.
Further, the initial opening ratio debugging process of the mouth plate is specifically as follows: and (4) observing the extruded state of the tire tread by eyes and continuously adjusting the initial opening rate of the die plate until the tire tread does not droop or stretch on the linkage line, the tire tread is in contact with a roller shaft of the linkage line, and the linear speed of the tire tread is consistent with that of the linkage line.
Further, the corresponding relation curve between the shrinkage rate of each tread rubber material and the opening rate of each die plate is as follows: the die has an opening ratio a + b shrinkage of the tread compound, wherein a and b are constants.
Advantageous effects
The method for establishing the opening standard of the tire tread extrusion port plate can effectively improve the primary qualification rate of the opening of the tire tread extrusion port plate, reduce the amount of returned glue caused by a test plate, improve the trial production completion rate of a new product, improve the shrinkage condition of the tire tread after extrusion, improve the uniformity of the weight of the tire tread, effectively reduce the RFV mean value and further improve the comfort of the tire in the use process.
Drawings
Fig. 1 is a flowchart of a method for establishing a tread pressure outlet type plate opening standard according to embodiment 1 of the present invention;
FIG. 2 is a graph of shrinkage of each compound versus opening ratio of the corresponding die plate in specific example 1 of the present invention;
fig. 3 is a schematic diagram showing the standard dimensions of the adhesive member in embodiment 1 of the present invention.
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.
Detailed description of the preferred embodiment 1
A method of establishing a tread die opening criterion, as shown in fig. 1, comprising the steps of:
s1, pre-establishing a relation curve between the shrinkage rate of the tread rubber compound and the opening rate of the corresponding die plate.
Specifically, shrinkage rates of various tread rubber materials are measured, initial opening rates of mouth-shaped plates corresponding to the tread rubber materials are respectively calculated, corresponding mouth-shaped plates are designed according to the initial opening rates of the mouth-shaped plates, the mouth-shaped plates are actually debugged at an extrusion line to obtain opening rate data of the mouth-shaped plates, and a relation curve between the shrinkage rates of the tread rubber materials and the opening rates of the corresponding mouth-shaped plates is established.
Further, the die initial opening ratio is 1-the shrinkage of the tread compound.
Further, the shrinkage measurement process of the tread compound is specifically as follows: a 200mm by 300mm sample of tread compound was open-rolled on a 10 inch calender for 2 minutes, with the spacing between the two rolls in the calender set to 2mm to obtain a 2mm thick film, and the calender was stopped after the film was obtained. And (3) sticking a 50 mm-150 mm paper board on a compression roller, cutting the rubber sheet along the paper board by using a rubber cutter, wherein the length of the paper board is 150mm of the initial length of the rubber sheet before shrinkage, placing the rubber sheet in a disc with talcum powder for 24 hours, measuring the length of the rubber sheet after shrinkage, and calculating the shrinkage rate of the tread rubber material according to the initial length of the rubber sheet and the length of the rubber material after shrinkage.
Further, the shrinkage ratio of the tread rubber material (initial length of the film-length of the film after shrinkage)/initial length of the film.
In this example, the shrinkage ratio of the tread rubber was (150-the length of the rubber sheet after shrinkage)/150.
Further, the initial opening ratio debugging process of the mouth plate is specifically as follows: and (3) observing the extruded state of the tire tread by eyes and continuously adjusting the initial opening rate of the mouth-shaped plate, wherein the opening rate of the mouth-shaped plate when the tire tread does not droop or stretch on the linkage line, the tire tread is in contact with a roller shaft of the linkage line, and the linear velocity of the tire tread is consistent with the linear velocity of the linkage line is the final opening rate of the mouth-shaped plate.
Further, the corresponding relation curve between the shrinkage rate of each tread rubber material and the opening rate of each die plate is as follows: the die has an opening ratio a + b shrinkage of the tread compound, wherein a and b are constants. When the rubber material is used, the shrinkage rate of the rubber material which is not produced or new rubber material is substituted into a formula, and the opening ratio of the rubber material corresponding to the mouth-shaped plate is obtained.
Specifically, taking sizing materials PE95, PE17, PE02, PE13, PE08, PE99, PE04, PE07, P299, PE16, P299, P212, P815, PE28, P350, PE72 and P165 as examples, respectively measuring the shrinkage rate of the sizing materials and calculating the initial opening rate of the corresponding die plate, designing the corresponding die plate according to the initial opening rate of the die plate, then actually debugging each die plate at an extrusion line, visually observing the state of the extruded tread and continuously adjusting the initial opening rate of the die plate, and when the tread does not droop or stretch on a linkage line and is just in contact with a linkage line roller shaft, measuring the linear velocity of the tread by using a velocimeter and the linkage line velocity are consistent, the opening rate of the die plate at the moment is the opening rate of the actual die plate, and recording the opening rate of the die plate at the moment. The shrinkage rate of each rubber material and the opening ratio of the corresponding die plate are shown in table 1, the relationship curve of the shrinkage rate of each rubber material and the opening ratio of the corresponding die plate is shown in fig. 2, and a linear equation is derived according to the shrinkage rate of each rubber material and the opening ratio of the corresponding die plate: y-0.5213 x +1.0117, where y is the die opening ratio and x is the shrinkage of the compound.
TABLE 1 data sheet of shrinkage of each gum material and opening ratio of corresponding die plate
S2, measuring the shrinkage rate of the tread rubber compound and obtaining the opening rate of the corresponding die plate through the relation curve in the step S1.
Taking AQTE95 rubber as an example, the shrinkage of the rubber is 17%, the aperture ratio of the die plate corresponding to the rubber without the method of the invention is 98.7%, and the aperture ratio of the die plate corresponding to the rubber after the improvement of the method of the invention is 85%.
And S3, determining the width opening size of the mouth plate according to the opening ratio of the mouth plate in the step S2.
Further, the plate width opening size is the standard size of the glue part of the opening ratio of the plate.
Specifically, the standard size of the rubber part is the size of the square book. In this embodiment, the standard size of the rubber part is as shown in fig. 3, the data unit in fig. 3 is mm, the opening size of the corresponding mouth plate width can be calculated according to the opening ratio of the mouth plate and the standard size of the rubber part, and further the mouth shape of the corresponding mouth plate is adjusted, so that the qualification rate of the primary test plate of the mouth plate is improved, and the comparison between the qualification rates of the primary test plate of the mouth plate before and after the mouth shape is changed is shown in table 2.
Table 2 mouth-shaped plate one-time test qualification rate table
| First test plate qualification rate of mouth-shaped plate (%) | |
| Before the mouth shape is changed | 37 |
| After the mouth shape is changed | 87 |
As can be seen from Table 2, by developing a sizing material shrinkage measurement method, a die plate opening standard is established, and the primary qualified rate of a die test plate is improved by 50%.
Taking the tread specifications of BT10376, BT10239, BT04874 and BT05910 as examples, the opening size of the die width is reset by the establishing method of the invention, and the RFV data before die change and after die change are compared with each other and shown in table 3.
TABLE 3 comparison table of RFV data before and after die change for each tread specification
As can be seen from Table 3, by developing a rubber material shrinkage rate measuring method, a linear relation between the tread rubber material shrinkage rate and the aperture ratio of the mouth plate is formed, data support is provided for the new specification opening ratio, the RFV of the finished tire is obviously reduced through adjustment of the aperture ratio of the mouth plate, and the comfort of the tire in the use process is improved.
The invention is particularly suitable for the die plate opening of the extrusion die plate of the semi-steel radial tire tread, the rubber material shrinkage data is measured, the opening rate is established for the die plate according to the tread rubber material shrinkage data, the prior uniform opening rate of all rubber materials is improved into the prior uniform opening rate established according to different tread rubber materials, so that the opening qualification rate of the die plate of the tread is higher, the extruded tread is more stable, and the weight is more uniform.
The present invention has been described in detail, and it should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
Claims (8)
1. A method for establishing a tread extrusion die opening standard is characterized by comprising the following steps:
s1, pre-establishing a relation curve between the shrinkage rate of the tread rubber and the opening rate of the corresponding die plate;
s2, measuring the shrinkage rate of the tread rubber material and obtaining the opening rate of the corresponding die plate through the relation curve in the step S1;
and S3, determining the width opening size of the mouth plate according to the opening ratio of the mouth plate in the step S2.
2. The method of establishing tread die opening criteria of claim 1, wherein the die width opening size is the standard size of the die opening ratio and the rubber component.
3. The method for establishing a tread die opening criterion according to claim 1, wherein step S1 is embodied as follows: measuring the shrinkage rate of various tread rubber materials, respectively calculating the initial opening rate of the mouth-shaped plate corresponding to each tread rubber material, designing the corresponding mouth-shaped plate according to the initial opening rate of each mouth-shaped plate, actually debugging each mouth-shaped plate at an extrusion line to obtain the opening rate data of each mouth-shaped plate, and establishing a relation curve between the shrinkage rate of each tread rubber material and the opening rate of the corresponding mouth-shaped plate.
4. The method of establishing a tread die opening criterion of claim 3 wherein the initial opening ratio of the die is 1-shrinkage of the tread compound.
5. The method of establishing a tread die opening criterion of claim 4 wherein the shrinkage measurement of the tread compound is as follows: and (3) open-milling the tire tread rubber material on a calender to obtain a rubber sheet, cutting the rubber sheet with a fixed length, recording the initial length of the rubber sheet before shrinkage, placing the rubber sheet in talcum powder for 24 hours, measuring the length of the rubber sheet after shrinkage, and calculating the shrinkage rate of the tire tread rubber material according to the initial length of the rubber sheet and the length of the rubber material after shrinkage.
6. The method of establishing a tread die plate opening criterion of claim 5 wherein the tread compound has a shrinkage factor (initial film length-length of film after shrinkage)/initial film length.
7. The method for establishing the tread extrusion die opening standard according to claim 3, wherein the initial opening ratio debugging process of the die is as follows: and (4) observing the extruded state of the tire tread visually, and adjusting the initial opening rate of the mouth-shaped plate until the tire tread does not droop or stretch on the linkage line, the tire tread is in contact with a roller shaft of the linkage line, and the linear speed of the tire tread is consistent with that of the linkage line.
8. The method of establishing a tread die opening criterion of claim 3 wherein the relationship between the shrinkage of each tread compound and the opening ratio of each die is as follows: the die has an opening ratio a + b shrinkage of the tread compound, wherein a and b are constants.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011170483.1A CN112231843B (en) | 2020-10-28 | 2020-10-28 | Method for establishing opening standard of tread extrusion die plate |
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| CN202011170483.1A CN112231843B (en) | 2020-10-28 | 2020-10-28 | Method for establishing opening standard of tread extrusion die plate |
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| CN112231843B CN112231843B (en) | 2022-11-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114043704A (en) * | 2021-11-17 | 2022-02-15 | 赛轮集团股份有限公司 | Production process of solid tire bead ring positioning rubber sheet |
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Effective date of registration: 20240328 Address after: 266000 Maoshan Road 588, Huangdao District, Qingdao City, Shandong Province Patentee after: Sailun Group Co.,Ltd. Country or region after: China Patentee after: Zhucheng Yong'an Rubber Technology Co.,Ltd. Address before: No. 43, Zhengzhou Road, North District, Qingdao, Shandong Patentee before: Sailun Group Co.,Ltd. Country or region before: China |