CN114368094A - Method for determining tire vulcanization time - Google Patents
Method for determining tire vulcanization time Download PDFInfo
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- CN114368094A CN114368094A CN202210285276.3A CN202210285276A CN114368094A CN 114368094 A CN114368094 A CN 114368094A CN 202210285276 A CN202210285276 A CN 202210285276A CN 114368094 A CN114368094 A CN 114368094A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C35/0288—Controlling heating or curing of polymers during moulding, e.g. by measuring temperatures or properties of the polymer and regulating the process
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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)
- B29D30/0601—Vulcanising tyres; Vulcanising presses for tyres
- B29D30/0662—Accessories, details or auxiliary operations
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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)
- B29D30/0601—Vulcanising tyres; Vulcanising presses for tyres
- B29D30/0662—Accessories, details or auxiliary operations
- B29D2030/0675—Controlling the vulcanization processes
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Abstract
The invention relates to a method for determining tire vulcanization time, which relates to the technical field of tire vulcanization, when a central control module controls a cutting machine to cut a vulcanized experimental tire blank, the central control module controls the cutting machine to respectively cut the tire crown, the tire shoulder and the tire side of the experimental tire blank, when the tire crown is cut, longitudinally cutting the convex part of the tire crown grain, and longitudinally cutting the side with the largest thickness value when the tire shoulder and the tire side are cut, the cutting lengths L of the tire crown, the tire shoulder and the tire side are the same, the central control module judges the vulcanization degree of the cutting surfaces of the tire crown, the tire shoulder and the tire side according to the unit area foaming quantity and the average foaming volume value of the cutting surfaces of the tire crown, the tire shoulder and the tire side respectively, and the central control module generates the vulcanization time of the tire to be produced according to the judgment result. The method provided by the invention effectively improves the accuracy of the vulcanization time.
Description
Technical Field
The invention relates to the technical field of tire vulcanization, in particular to a method for determining tire vulcanization time.
Background
The tyre vulcanization is the vulcanization of the outer tyre by adopting a model pressurization mode, and is characterized in that the outer diameter of a tyre blank formed by the outer tyre is smaller than the inner diameter of the model, a water tyre or a capsule is filled in the tyre blank during vulcanization, high-pressure hot water is injected into the water tyre, the outer tyre blank is filled in the model by utilizing the expansion pressure of the water tyre or the capsule, and the outer tyre vulcanization adopts a gradual heating and low-temperature long-time vulcanization method so as to ensure that the rubber material fully flows and transfers heat and ensure the vulcanization quality.
In the production process of tires, the vulcanization time has a great influence on the quality of the tires. In the prior art, when the vulcanization time is determined, a tire cutting test method is mostly adopted, namely, a hot tire which is just taken out of a pot is cut, and the existence of bubbles in the tire is observed manually.
Disclosure of Invention
Therefore, the invention provides a method for determining tire vulcanization time, which is used for overcoming the problem of low tire production quality caused by the fact that the tire vulcanization time cannot be accurately calculated in the prior art.
In order to achieve the above object, the present invention provides a method for determining a tire vulcanization time, comprising:
step a: selecting corresponding experimental tire blanks and experimental rubber materials according to the type of the tire to be produced;
step b: carrying out a vulcanization experiment on the experimental rubber material at a preset vulcanization temperature T1 and a preset vulcanization degree A1, recording the time T1 taken by the experimental rubber material to reach a first bubble point in the vulcanization process, the unit area foaming quantity A and the foaming volume average value B of the experimental rubber material at the moment by the central control module, and recording the time T2 taken by the experimental rubber material to reach the preset vulcanization degree A1;
step c: the central control module controls a vulcanizing machine to vulcanize the experimental tire blank at a vulcanization temperature T1 and a vulcanization time T1, and after vulcanization is completed, the central control module controls a cutting machine to cut the vulcanized experimental tire blank;
step d: the central control module judges the vulcanization degree of the cutting surface, compares the unit area foaming quantity and the average value of the foaming volume of the cutting surface with the unit area foaming quantity A and the average value of the foaming volume B generated by the rubber material in t1 time, judges that t2 is the vulcanization time of the tire to be produced if the vulcanization degrees are the same, and calculates the vulcanization time of the tire to be produced according to the difference if the vulcanization degrees are different;
in the step c, when the central control module controls the cutting machine to cut the vulcanized experimental tire blank, the central control module controls the cutting machine to cut the tire crown, the tire shoulder and the tire side of the experimental tire blank respectively, when the tire crown is cut, the crown with the raised grain is selected for longitudinal cutting, when the tire shoulder and the tire side are cut, one side with the largest thickness value is selected for longitudinal cutting, and the cutting lengths L of the tire crown, the tire shoulder and the tire side are the same;
in the step d, when the vulcanization degree of the cutting surface is judged, the central control module respectively judges the vulcanization degree of the cutting surface of the tire crown, the tire shoulder and the tire side according to the unit area foaming quantity and the average foaming volume value of the cutting surface of the tire crown, the tire shoulder and the tire side, and the central control module generates the vulcanization time of the tire to be produced according to the judgment result.
Further, the central control module acquires the foaming quantity per unit area A1 and the average foaming volume B1 of the tire crown section, the central control module is provided with a tire crown foaming quantity difference delta Aa and a tire crown foaming volume difference delta Ba = B1-B, and the central control module is also provided with a tire crown foaming volume difference delta Aa and a tire crown foaming volume difference delta Ba = B1-A;
when the central control module judges the vulcanization degree of the tire crown, the number standard difference value is set to be delta A, the volume standard difference value is set to be delta B, the central control module compares the tire crown foaming number difference delta Aa with the number standard difference value delta A, and the vulcanization degree of the tire crown is judged according to the comparison result:
when delta Aa < -delta A, the central control module judges that the vulcanization degree of the tire crown is insufficient;
when the-delta A is less than or equal to the delta Aa, the central control module judges that the vulcanization degree of the tire crown is the same as the vulcanization degree of the rubber compound;
and when the delta A < [ delta ] Aa, the central control module continuously judges the vulcanization degree of the tire crown.
Further, when the central control module continuously determines the vulcanization degree of the tire crown, the central control module compares a tire crown foaming volume difference delta Ba with a volume standard difference value delta B, and determines the vulcanization degree of the tire crown according to a comparison result:
when delta Ba < -delta B, the central control module judges that the vulcanization degree of the tire crown is the same as the vulcanization degree of the rubber compound;
and when the delta Ba is more than or equal to the delta B, the central control module judges that the vulcanizing process of the tire crown is excessive.
Further, the central control module acquires the foaming quantity per unit area A2 and the average foaming volume B2 of the tire shoulder section, the central control module is provided with a tire shoulder foaming quantity difference delta Ab, and the setting is delta Ab = A2-A, the central control module is also provided with a tire shoulder foaming volume difference delta Bb, and the setting is delta Bb = B2-B;
when the central control module judges the vulcanization degree of the tire shoulder, the central control module compares the tire shoulder blistering quantity difference delta Ab with a quantity standard difference value delta A, and judges the vulcanization degree of the tire shoulder according to a comparison result:
when delta Ab < -delta A, the central control module judges that the vulcanization degree of the tire shoulder is insufficient;
when-delta A is less than or equal to delta Ab is less than or equal to delta A, the central control module judges that the vulcanization degree of the tire shoulder is the same as the vulcanization degree of the rubber compound;
and when the delta A < [ delta ] Ab, the central control module continues to judge the vulcanization degree of the tire shoulder.
Further, when the central control module continuously judges the vulcanization degree of the tire shoulder, the central control module compares the volume difference delta Bb of the tire shoulder bubbles with a volume standard difference value delta B, and judges the vulcanization degree of the tire shoulder according to a comparison result:
when delta Bb < -delta B, the central control module judges that the vulcanization degree of the tire shoulder is the same as the vulcanization degree of the rubber compound;
and when the delta Bb is more than or equal to the delta B, the central control module judges that the vulcanization process of the tire shoulder is excessive.
Further, the central control module collects the foaming quantity per unit area A3 and the average foaming volume B3 of the section of the tire side, the central control module is provided with a difference delta Ac of the foaming quantity of the tire side, and the setting is delta Ac = A3-A, and the central control module is also provided with a difference delta Bc of the foaming volume of the tire side, and the setting is delta Bc = B3-B;
when the central control module judges the vulcanization degree of the sidewall, the central control module compares the sidewall foaming quantity difference delta Ac with a quantity standard difference value delta A, and judges the vulcanization degree of the sidewall according to a comparison result:
when the delta Ac is smaller than the delta A, the central control module judges that the vulcanization degree of the tire side is insufficient;
when the-delta A is less than or equal to the-delta Ac is less than or equal to the-delta A, the central control module judges that the vulcanization degree of the tire side is the same as the vulcanization degree of the rubber compound;
and when the delta A is less than the delta Ac, the central control module continuously judges the vulcanization degree of the tire side.
Further, when the central control module continuously determines the vulcanization degree of the sidewall, the central control module compares a sidewall foamed volume difference Δ Bc with a volume standard difference value Δ B, and determines the vulcanization degree of the sidewall according to a comparison result:
when delta Bc < -delta B, the central control module judges that the vulcanization degree of the tire side is the same as the vulcanization degree of the rubber compound;
and when the delta Bc is more than or equal to the delta B, the central control module judges that the vulcanization process of the tire side is excessive.
Further, when the number of the judgment results of the vulcanization degrees of the tire crown, the tire shoulder and the tire side is more than or equal to two, and the judgment results are that the vulcanization degree is the same as the vulcanization degree of the rubber material, the central control module judges that the vulcanization degree of the experimental tire blank is the same as the vulcanization degree of the rubber material, and judges that t2 is the vulcanization time of the tire to be produced.
Further, when the number of the determination results that the vulcanization degree is the same as the rubber vulcanization degree is less than two in the vulcanization degree determination results of the tire crown, the tire shoulder and the tire side, the central control module determines that the vulcanization degree of the experimental tire blank is different from the vulcanization degree of the rubber, and at this time, determines that the vulcanization time of the tire to be produced is t 2', and sets:
t2’=t2×{1-[(△Aa+△Ab+△Ac)/△A]%}，
in the formula, t2 is the time taken for the test rubber compound to reach a preset vulcanization degree A1, Δ Aa is the difference of the number of the tire crown bubbles, Δ Ab is the difference of the number of the tire shoulder bubbles, Δ Ac is the difference of the number of the tire side bubbles, and Δ A is the standard difference of the number.
Compared with the prior art, the method has the advantages that the central control module effectively ensures the data accuracy of the cutting surface of the experimental blank by controlling the cutting position and the cutting length L of the experimental blank, so that the accuracy of the vulcanization time is improved, the central control module enables the judgment of the vulcanization time of the experimental blank to be more accurate by judging the vulcanization degree of the cutting surfaces of the tire crown, the tire shoulder and the tire side, the accuracy of the judgment of the vulcanization time is further improved, meanwhile, when the central control module calculates the vulcanization time, the data of the cutting surfaces of the tire crown, the tire shoulder and the tire side are related, the accuracy of the calculation of the vulcanization time is further improved, and the production quality of the tire is further improved.
Particularly, the central control module compares the tire crown foaming quantity difference delta Aa with the quantity standard difference value delta A, and judges the vulcanization degree of the tire crown according to the comparison result, so that the tire crown vulcanization degree judgment accuracy is effectively improved, and the vulcanization time calculation accuracy is further improved.
Particularly, the central control module compares the tire crown foaming volume difference delta Ba with the volume standard difference value delta B, and judges the vulcanization degree of the tire crown according to the comparison result, so that the tire crown vulcanization degree judgment accuracy is further improved, and the vulcanization time calculation accuracy is further improved.
Particularly, the central control module compares the tire shoulder blistering quantity difference delta Ab with the quantity standard difference value delta A, and judges the vulcanization degree of the tire shoulder according to the comparison result, so that the accuracy of judging the tire shoulder vulcanization degree is effectively improved, and the accuracy of calculating the vulcanization time is further improved.
Particularly, the central control module compares the shoulder foaming volume difference delta Bb with the volume standard difference value delta B, and judges the vulcanization degree of the shoulder according to the comparison result, so that the accuracy of judging the vulcanization degree of the shoulder is further improved, and the accuracy of calculating the vulcanization time is further improved.
Particularly, the central control module compares the sidewall foaming quantity difference delta Ac with the quantity standard difference value delta A, and judges the vulcanization degree of the sidewall according to the comparison result, so that the accuracy of judging the vulcanization degree of the sidewall is effectively improved, and the accuracy of calculating the vulcanization time is further improved.
Particularly, the central control module compares the sidewall foaming volume difference delta Bc with the volume standard difference value delta B, and judges the vulcanization degree of the sidewall according to the comparison result, so that the accuracy of judging the vulcanization degree of the sidewall is further improved, and the accuracy of calculating the vulcanization time is further improved.
Particularly, the central control module judges the vulcanization time according to the vulcanization degree judgment results of the tire crown, the tire shoulder and the tire side, and calculates the vulcanization time according to the tire crown bubble number difference delta Aa, the tire shoulder bubble number difference delta Ab and the tire side bubble number difference delta Ac, so that the accuracy of calculating the vulcanization time is further improved.
Drawings
Fig. 1 is a schematic flow chart of a method for determining a tire curing time according to the present embodiment.
Detailed Description
In order that the objects and advantages of the invention will be more clearly understood, the invention is further described below with reference to examples; it should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and do not limit the scope of the present invention.
Referring to fig. 1, the present embodiment provides a method for determining a tire vulcanization time, including:
step a: selecting corresponding experimental tire blanks and experimental rubber materials according to the type of the tire to be produced;
step b: carrying out a vulcanization experiment on the experimental rubber material at a preset vulcanization temperature T1 and a preset vulcanization degree A1, recording the time T1 taken by the experimental rubber material to reach a first bubble point in the vulcanization process, the unit area foaming quantity A and the foaming volume average value B of the experimental rubber material at the moment by the central control module, and recording the time T2 taken by the experimental rubber material to reach the preset vulcanization degree A1;
step c: the central control module controls a vulcanizing machine to vulcanize the experimental tire blank at a vulcanization temperature T1 and a vulcanization time T1, after vulcanization is completed, the central control module controls a cutting machine to cut the vulcanized experimental tire blank, and after cutting, the central control module controls data acquisition equipment to acquire the foaming quantity per unit area and the average foaming volume value of a cutting surface;
step d: the central control module judges the vulcanization degree of the cutting surface, compares the unit area foaming quantity and the average value of the foaming volume of the cutting surface with the unit area foaming quantity A and the average value of the foaming volume B generated by the rubber material in t1 time, judges that t2 is the vulcanization time of the tire to be produced if the vulcanization degrees are the same, and calculates the vulcanization time of the tire to be produced according to the difference if the vulcanization degrees are different;
specifically, in the step c, when the central control module controls the cutting machine to cut the vulcanized experimental tire blank, the central control module controls the cutting machine to cut the tire crown, the tire shoulder and the tire side of the experimental tire blank respectively, when the tire crown is cut, the longitudinal cutting at the convex part of the tire crown texture is selected, when the tire shoulder and the tire side are cut, the longitudinal cutting at the side with the largest thickness value is selected, and the cutting lengths L of the tire crown, the tire shoulder and the tire side are the same;
in the step d, when the vulcanization degree of the cutting surface is judged, the central control module respectively judges the vulcanization degree of the cutting surface of the tire crown, the tire shoulder and the tire side according to the unit area foaming quantity and the average foaming volume value of the cutting surface of the tire crown, the tire shoulder and the tire side, and the central control module generates the vulcanization time of the tire to be produced according to the judgment result.
Specifically, the central control module acquires the foaming quantity per unit area A1 and the average foaming volume B1 of the tire crown section, the central control module is provided with a tire crown foaming quantity difference delta Aa and a tire crown foaming volume difference delta Ba = B1-B, and the tire crown foaming quantity difference delta Aa = A1-A is set;
when the central control module judges the vulcanization degree of the tire crown, the number standard difference value is set to be delta A, the volume standard difference value is set to be delta B, the central control module compares the tire crown foaming number difference delta Aa with the number standard difference value delta A, and the vulcanization degree of the tire crown is judged according to the comparison result:
when delta Aa < -delta A, the central control module judges that the vulcanization degree of the tire crown is insufficient;
when the-delta A is less than or equal to the delta Aa, the central control module judges that the vulcanization degree of the tire crown is the same as the vulcanization degree of the rubber compound;
and when the delta A < [ delta ] Aa, the central control module continuously judges the vulcanization degree of the tire crown.
Specifically, the control module compares the tire crown foaming quantity difference delta Aa with the quantity standard difference delta A, and judges the vulcanization degree of the tire crown according to the comparison result, so that the tire crown vulcanization degree judgment accuracy is effectively improved, and the vulcanization time calculation accuracy is further improved.
Specifically, when the central control module continuously determines the vulcanization degree of the tire crown, the central control module compares a tire crown foaming volume difference Δ Ba with a volume standard difference value Δ B, and determines the vulcanization degree of the tire crown according to a comparison result:
when delta Ba < -delta B, the central control module judges that the vulcanization degree of the tire crown is the same as the vulcanization degree of the rubber compound;
and when the delta Ba is more than or equal to the delta B, the central control module judges that the vulcanizing process of the tire crown is excessive.
Specifically, the central control module acquires the foaming quantity per unit area A2 and the average foaming volume B2 of the tire shoulder section, the central control module is provided with a tire shoulder foaming quantity difference delta Ab, and the setting delta Ab = A2-A, and the central control module is also provided with a tire shoulder foaming volume difference delta Bb, and the setting delta Bb = B2-B;
when the central control module judges the vulcanization degree of the tire shoulder, the central control module compares the tire shoulder blistering quantity difference delta Ab with a quantity standard difference value delta A, and judges the vulcanization degree of the tire shoulder according to a comparison result:
when delta Ab < -delta A, the central control module judges that the vulcanization degree of the tire shoulder is insufficient;
when-delta A is less than or equal to delta Ab is less than or equal to delta A, the central control module judges that the vulcanization degree of the tire shoulder is the same as the vulcanization degree of the rubber compound;
and when the delta A < [ delta ] Ab, the central control module continues to judge the vulcanization degree of the tire shoulder.
Specifically, the central control module compares the tire shoulder blistering quantity difference delta Ab with the quantity standard difference value delta A, and judges the vulcanization degree of the tire shoulder according to the comparison result, so that the accuracy of judging the tire shoulder vulcanization degree is effectively improved, and the accuracy of calculating the vulcanization time is further improved. And in the judging process, according to three different states of judging that the vulcanization degree of the tire shoulder is insufficient, judging that the vulcanization degree of the tire shoulder is the same as the vulcanization degree of the rubber material and judging that the vulcanization degree of the tire shoulder is continuously judged, and in the dynamic vulcanization judging process, the adjustment of the corresponding tire vulcanization is completed.
Specifically, when the central control module continuously determines the vulcanization degree of the tire shoulder, the central control module compares a tire shoulder blister volume difference delta Bb with a volume standard difference value delta B, and determines the vulcanization degree of the tire shoulder according to a comparison result:
when delta Bb < -delta B, the central control module judges that the vulcanization degree of the tire shoulder is the same as the vulcanization degree of the rubber compound;
and when the delta Bb is more than or equal to the delta B, the central control module judges that the vulcanization process of the tire shoulder is excessive.
Specifically, the central control module collects the foaming quantity per unit area A3 and the average foaming volume B3 of the section of the side wall, the central control module is provided with a side wall foaming quantity difference delta Ac and is set to be delta Ac = A3-A, and the central control module is also provided with a side wall foaming volume difference delta Bc and is set to be delta Bc = B3-B;
when the central control module judges the vulcanization degree of the sidewall, the central control module compares the sidewall foaming quantity difference delta Ac with a quantity standard difference value delta A, and judges the vulcanization degree of the sidewall according to a comparison result:
when the delta Ac is smaller than the delta A, the central control module judges that the vulcanization degree of the tire side is insufficient;
when the-delta A is less than or equal to the-delta Ac is less than or equal to the-delta A, the central control module judges that the vulcanization degree of the tire side is the same as the vulcanization degree of the rubber compound;
and when the delta A is less than the delta Ac, the central control module continuously judges the vulcanization degree of the tire side.
Specifically, the central control module compares the sidewall blistering quantity difference delta Ac with the quantity standard difference value delta A, and judges the vulcanization degree of the sidewall according to the comparison result, so that the accuracy of judging the vulcanization degree of the sidewall is effectively improved, and the accuracy of calculating the vulcanization time is further improved.
Specifically, when the central control module continuously determines the vulcanization degree of the sidewall, the central control module compares a sidewall foaming volume difference Δ Bc with a volume standard difference value Δ B, and determines the vulcanization degree of the sidewall according to a comparison result:
when delta Bc < -delta B, the central control module judges that the vulcanization degree of the tire side is the same as the vulcanization degree of the rubber compound;
and when the delta Bc is more than or equal to the delta B, the central control module judges that the vulcanization process of the tire side is excessive.
Specifically, when the number of the determination results that the vulcanization degree is the same as the vulcanization degree of the rubber compound is greater than or equal to two in the vulcanization degree determination results of the tire crown, the tire shoulder and the tire side, the central control module determines that the vulcanization degree of the experimental tire blank is the same as the vulcanization degree of the rubber compound, and determines that t2 is the vulcanization time of the tire to be produced.
Specifically, when the number of the determination results that the vulcanization degree is the same as the rubber vulcanization degree is less than two in the vulcanization degree determination results of the tire crown, the tire shoulder and the tire side, the central control module determines that the vulcanization degree of the experimental tire blank is different from the vulcanization degree of the rubber, and at this time, determines that the vulcanization time of the tire to be produced is t 2', and sets:
t2’=t2×{1-[(△Aa+△Ab+△Ac)/△A]%}，
in the formula, t2 is the time taken for the test rubber compound to reach a preset vulcanization degree A1, Δ Aa is the difference of the number of the tire crown bubbles, Δ Ab is the difference of the number of the tire shoulder bubbles, Δ Ac is the difference of the number of the tire side bubbles, and Δ A is the standard difference of the number.
Specifically, the central control module judges the vulcanization time according to the vulcanization degree judgment results of the tire crown, the tire shoulder and the tire side, calculates the vulcanization time according to the tire crown bubble number difference delta Aa, the tire shoulder bubble number difference delta Ab and the tire side bubble number difference delta Ac, and further improves the accuracy of calculating the vulcanization time.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention; various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A method of determining a tire cure time, comprising:
step a: selecting corresponding experimental tire blanks and experimental rubber materials according to the type of the tire to be produced;
step b: carrying out a vulcanization experiment on the experimental rubber material at a preset vulcanization temperature T1 and a preset vulcanization degree A1, recording the time T1 taken by the experimental rubber material to reach a first bubble point in the vulcanization process, the unit area foaming quantity A and the foaming volume average value B of the experimental rubber material at the moment by the central control module, and recording the time T2 taken by the experimental rubber material to reach the preset vulcanization degree A1;
step c: the central control module controls a vulcanizing machine to vulcanize the experimental tire blank at a vulcanization temperature T1 and a vulcanization time T1, and after vulcanization is completed, the central control module controls a cutting machine to cut the vulcanized experimental tire blank;
step d: the central control module judges the vulcanization degree of the cutting surface, compares the unit area foaming quantity and the average value of the foaming volume of the cutting surface with the unit area foaming quantity A and the average value of the foaming volume B generated by the rubber material in t1 time, judges that t2 is the vulcanization time of the tire to be produced if the vulcanization degrees are the same, and calculates the vulcanization time of the tire to be produced according to the difference if the vulcanization degrees are different;
in the step c, when the central control module controls the cutting machine to cut the vulcanized experimental tire blank, the central control module controls the cutting machine to cut the tire crown, the tire shoulder and the tire side of the experimental tire blank respectively, when the tire crown is cut, the crown with the raised grain is selected for longitudinal cutting, when the tire shoulder and the tire side are cut, one side with the largest thickness value is selected for longitudinal cutting, and the cutting lengths L of the tire crown, the tire shoulder and the tire side are the same;
in the step d, when the vulcanization degree of the cutting surface is judged, the central control module respectively judges the vulcanization degree of the cutting surface of the tire crown, the tire shoulder and the tire side according to the unit area foaming quantity and the average foaming volume value of the cutting surface of the tire crown, the tire shoulder and the tire side, and the central control module generates the vulcanization time of the tire to be produced according to the judgment result.
2. The method for determining the tire vulcanization time according to claim 1, wherein the central control module collects the foaming quantity per unit area a1 and the average foaming volume B1 of the crown section, the central control module is provided with a crown foaming quantity difference Δ Aa and a crown foaming volume difference Δ Aa = a1-a, and the central control module is further provided with a crown foaming volume difference Δ Ba and a crown foaming volume difference Δ Ba = B1-B;
when the central control module judges the vulcanization degree of the tire crown, the number standard difference value is set to be delta A, the volume standard difference value is set to be delta B, the central control module compares the tire crown foaming number difference delta Aa with the number standard difference value delta A, and the vulcanization degree of the tire crown is judged according to the comparison result:
when delta Aa < -delta A, the central control module judges that the vulcanization degree of the tire crown is insufficient;
when the-delta A is less than or equal to the delta Aa, the central control module judges that the vulcanization degree of the tire crown is the same as the vulcanization degree of the rubber compound;
and when the delta A < [ delta ] Aa, the central control module continuously judges the vulcanization degree of the tire crown.
3. The method for determining the tire vulcanization time according to claim 2, wherein when the central control module continues to determine the tire crown vulcanization degree, the central control module compares a tire crown blister volume difference Δ Ba with a volume standard deviation value Δ B, and determines the tire crown vulcanization degree according to the comparison result:
when delta Ba < -delta B, the central control module judges that the vulcanization degree of the tire crown is the same as the vulcanization degree of the rubber compound;
and when the delta Ba is more than or equal to the delta B, the central control module judges that the vulcanizing process of the tire crown is excessive.
4. The method for determining the tire curing time according to claim 3, wherein the central control module acquires the bubbling quantity per unit area A2 and the average value of bubbling volume B2 of the shoulder section, the central control module is provided with a difference Δ Ab of the bubbling quantity of the shoulder, and is set as Δ Ab = A2-A, and the central control module is also provided with a difference Δ Bb of the bubbling volume of the shoulder, and is set as Δ Bb = B2-B;
when the central control module judges the vulcanization degree of the tire shoulder, the central control module compares the tire shoulder blistering quantity difference delta Ab with a quantity standard difference value delta A, and judges the vulcanization degree of the tire shoulder according to a comparison result:
when delta Ab < -delta A, the central control module judges that the vulcanization degree of the tire shoulder is insufficient;
when-delta A is less than or equal to delta Ab is less than or equal to delta A, the central control module judges that the vulcanization degree of the tire shoulder is the same as the vulcanization degree of the rubber compound;
and when the delta A < [ delta ] Ab, the central control module continues to judge the vulcanization degree of the tire shoulder.
5. The method for determining the tire curing time according to claim 4, wherein the central control module compares the shoulder blister volume difference Δ Bb with the volume standard difference value Δ B when the central control module continues to determine the curing degree of the tire shoulder, and determines the curing degree of the tire shoulder according to the comparison result:
when delta Bb < -delta B, the central control module judges that the vulcanization degree of the tire shoulder is the same as the vulcanization degree of the rubber compound;
and when the delta Bb is more than or equal to the delta B, the central control module judges that the vulcanization process of the tire shoulder is excessive.
6. The method for determining the tire curing time according to claim 5, wherein the central control module collects the foaming quantity per unit area A3 and the average foaming volume B3 of the side wall section, the central control module is provided with a side wall foaming quantity difference Δ Ac and a side wall foaming volume difference Δ Ac = A3-A, and the central control module is also provided with a side wall foaming volume difference Δ Bc and a side wall foaming volume difference Δ Bc = B3-B;
when the central control module judges the vulcanization degree of the sidewall, the central control module compares the sidewall foaming quantity difference delta Ac with a quantity standard difference value delta A, and judges the vulcanization degree of the sidewall according to a comparison result:
when the delta Ac is smaller than the delta A, the central control module judges that the vulcanization degree of the tire side is insufficient;
when the-delta A is less than or equal to the-delta Ac is less than or equal to the-delta A, the central control module judges that the vulcanization degree of the tire side is the same as the vulcanization degree of the rubber compound;
and when the delta A is less than the delta Ac, the central control module continuously judges the vulcanization degree of the tire side.
7. The method for determining the tire vulcanization time according to claim 6, wherein when the central control module continuously determines the vulcanization degree of the sidewall, the central control module compares a sidewall blister volume difference Δ Bc with a volume standard difference value Δ B, and determines the vulcanization degree of the sidewall according to the comparison result:
when delta Bc < -delta B, the central control module judges that the vulcanization degree of the tire side is the same as the vulcanization degree of the rubber compound;
and when the delta Bc is more than or equal to the delta B, the central control module judges that the vulcanization process of the tire side is excessive.
8. The method of claim 7, wherein when the number of the determination results of "the same degree of vulcanization as the degree of vulcanization of the compound" is equal to or greater than two in the results of the determination of the degrees of vulcanization of the crown, the shoulder and the sidewall, the central control module determines that the degree of vulcanization of the test blank is equal to the degree of vulcanization of the compound, and determines that t2 is the vulcanization time of the tire to be produced.
9. The method for determining the tire vulcanization time according to claim 8, wherein when the number of the determination results that "the vulcanization degree is the same as the vulcanization degree of the compound" is less than two in the vulcanization degree determination results of the crown, the shoulder and the sidewall, the central control module determines that the vulcanization degree of the test tire blank is different from the vulcanization degree of the compound, and then determines that the vulcanization time of the tire to be produced is t 2', setting:
t2’=t2×{1-[(△Aa+△Ab+△Ac)/△A]%}，
in the formula, t2 is the time taken for the test rubber compound to reach a preset vulcanization degree A1, Δ Aa is the difference of the number of the tire crown bubbles, Δ Ab is the difference of the number of the tire shoulder bubbles, Δ Ac is the difference of the number of the tire side bubbles, and Δ A is the standard difference of the number.
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| CN103624908A (en) * | 2013-12-03 | 2014-03-12 | 山东金宇轮胎有限公司 | Method for determining tire vulcanization time |
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