CN116604855B - Tire vulcanization heating system and control method - Google Patents
Tire vulcanization heating system and control method Download PDFInfo
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- CN116604855B CN116604855B CN202310891490.8A CN202310891490A CN116604855B CN 116604855 B CN116604855 B CN 116604855B CN 202310891490 A CN202310891490 A CN 202310891490A CN 116604855 B CN116604855 B CN 116604855B
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 136
- 238000004073 vulcanization Methods 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims abstract description 26
- 230000001105 regulatory effect Effects 0.000 claims abstract description 19
- 238000001514 detection method Methods 0.000 claims description 30
- 238000004891 communication Methods 0.000 claims description 8
- 230000001276 controlling effect Effects 0.000 claims description 8
- 230000006698 induction Effects 0.000 claims description 6
- 238000005485 electric heating Methods 0.000 claims description 5
- 238000012544 monitoring process Methods 0.000 claims description 3
- 230000033228 biological regulation Effects 0.000 claims description 2
- 230000003750 conditioning effect Effects 0.000 claims 2
- 239000000758 substrate Substances 0.000 description 8
- 238000012546 transfer Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 229920001971 elastomer Polymers 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
Classifications
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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
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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
- B29D2030/0666—Heating by using fluids
- B29D2030/0667—Circulating the fluids, e.g. introducing and removing them into and from the moulds; devices therefor
- B29D2030/067—Circulating the fluids, e.g. introducing and removing them into and from the moulds; devices therefor the vulcanizing fluids being gases or vapours
-
- 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
- B29D2030/0677—Controlling temperature differences
Abstract
The invention relates to the technical field of tire vulcanization, and discloses a tire vulcanization heating system and a control method, wherein the system comprises the following components: the tire mold and the heating plate are positioned on the upper side and the lower side of the mold, and at least one heating unit is arranged at a preset position of the tire mold and/or the heating plate; the at least one control unit is correspondingly connected with the at least one heating unit to regulate and control the heating unit; the temperature feedback devices are arranged at preset positions close to the heating unit, the connecting surface of the die part and/or the surface of the die cavity and are used for detecting the temperature and feeding back to the control unit; the master control unit is connected with at least one control unit to control the cavity surface of the tire mold to gradually reach the target vulcanization temperature. According to the invention, the tire vulcanization temperature is fed back and regulated through the plurality of temperature feedback devices, so that the tire vulcanization temperature is ensured to be within a preset range, the heating temperature gradually reaches the preset vulcanization temperature, the tire vulcanization quality and efficiency are improved, and the plurality of heating units are independently controlled to realize zone heating, so that the vulcanization quality and efficiency are improved.
Description
Technical Field
The invention relates to the technical field of tire vulcanization, in particular to a tire vulcanization heating system and a control method.
Background
In industrial production, vulcanization is often employed to increase the overall hardness of certain materials. For example, tire vulcanization refers to vulcanization of a tire casing by a mold pressurization method. Before vulcanization, the tire is a plastic rubber with viscoelasticity, is easy to deform, has low strength and no use value, and is cured into a high-elasticity rubber with use value through vulcanization. Conventional tire curing processes employ saturated steam. Specifically, the green tire is placed in a vulcanization mold, and saturated steam is introduced into the mold to provide heat required for vulcanization. But steam vulcanization is high in energy consumption and is gradually replaced by electric heating.
In the prior art, an electric heating tire mold is provided, temperature control is performed by setting a heating unit and setting temperature detection feedback adjustment, but the problems of overlarge deviation between the temperature of a cavity surface and a preset temperature value and overlarge fluctuation range are faced, and the tire vulcanization quality is low.
Disclosure of Invention
Therefore, the invention provides a tire vulcanization heating system and a control method, which solve the problems of overlarge temperature difference between the cavity surface temperature and the actual set temperature, overlarge temperature fluctuation of the cavity surface of a mold, overlong temperature adjustment time and the like caused by large heat transfer distance, thermal resistance of a connecting surface, heat loss and the like of the conventional temperature control system, so as to improve the tire vulcanization quality and efficiency.
In order to achieve the above purpose, the present invention provides the following technical solutions:
in a first aspect, embodiments of the present invention provide a tire curing heating system comprising: tire mould and hot plate, the hot plate is located the upper and lower both sides of mould, its characterized in that still includes:
at least one heating unit arranged at a preset position of the tire mold and/or the heating plate;
the control unit is correspondingly connected with at least one heating unit and is used for regulating and controlling the heating unit;
the temperature feedback devices are arranged at preset positions close to the heating unit, the die part connecting surface and/or the die cavity surface and are used for detecting the temperature of the arranged positions and feeding back the temperature to the control unit;
and the master control unit is connected with the at least one control unit and used for controlling the cavity surface of the tire mold to gradually reach the target vulcanization temperature.
Optionally, the control unit includes: the external power supply is connected with the heating unit through the power adjusting unit, the operation unit is respectively connected with the power adjusting unit, the communication unit and the temperature measuring unit, and the communication unit is connected with the master control unit.
Optionally, the heating unit is an induction heating coil, and the power adjusting unit includes: rectifying unit, voltage regulation unit and contravariant unit, wherein:
the rectification unit is used for converting external alternating current into direct current;
the voltage regulating unit is respectively connected with the rectifying unit, the inversion unit and the operation unit and is used for regulating the power of the heating unit by regulating the voltage;
and the inversion unit is connected with the heating unit and is used for converting direct current into high-frequency alternating current.
Optionally, the heating unit is an electric heating tube, and the power adjusting unit includes: and the relay is respectively connected with the heating unit and the operation unit and is used for adjusting the power of the heating unit through current on-off.
Optionally, the tire mold is a segmented mold and comprises a guide ring, an upper substrate, a lower substrate, an upper sidewall plate, a lower sidewall plate and a tread mold, and the heating unit is arranged on the outer wall of the guide ring of the mold and/or the surface of the upper substrate and/or the surface of the lower substrate and/or the heating plate.
Optionally, the temperature feedback device includes:
the heating position temperature detection device is arranged at a position 5mm-10mm away from the heating unit and is used as a temperature control point;
the connecting surface temperature detection device is arranged at a position 5mm-10mm away from the connecting surface of the die part and is used as a connecting surface temperature check point;
the cavity surface temperature detection device is arranged at a position 5mm-10mm away from the surface of the die cavity and is used as a cavity surface temperature check point.
Optionally, the plurality of heating units synchronously control the whole tire to uniformly vulcanize and heat, or independently control the zoned vulcanization and heating of the partial heating units.
In a second aspect, an embodiment of the present invention provides a method for controlling a tire vulcanizing heating system, where the method is based on the tire vulcanizing heating system according to any embodiment of the first aspect of the present invention, and the method includes:
s1: the total control unit responds to the heating starting instruction and receives the tire specification information and the target temperature value to be vulcanized and heated;
s2: inquiring whether the process templates with the same specification tire and the target temperature value exist in the database, and executing S3 if the process templates with the same specification tire and the target temperature value do not exist;
s3: the total control unit sends an instruction to the control unit to adjust the temperature of the temperature control point area to reach the target temperature;
s4: monitoring whether the temperature of the temperature control point is stabilized within a preset temperature range, and executing S5 or S7 when the temperature of the temperature control point is stabilized within the preset temperature range;
s5: detecting whether the temperature fluctuation range of the temperature check point of the connecting surface is within a preset temperature range, and executing S6 when the temperature fluctuation range of the temperature check point of the connecting surface is within the preset temperature range;
s6: calculating whether the difference value between the target temperature value of the temperature control point and the temperature value of the temperature check point of the connecting surface is within a preset range, if so, executing S7, and if not, feeding back the sum of the current target temperature value and the difference value as an updated target temperature value to a total control unit to reassign the target temperature of the temperature control point;
s7: detecting whether the temperature fluctuation range of the temperature check point of the cavity surface is within a preset temperature range, and executing S8 after the temperature fluctuation range of the temperature check point of the cavity surface is within the preset temperature range;
s8: calculating whether the difference value between the initial target temperature value of the temperature control point and the temperature value of the temperature check point of the cavity surface is within a preset range, if so, executing S9, and if not, feeding back the sum of the current target temperature value and the difference value as an updated target temperature value to a total control unit to reassign the target temperature of the temperature control point;
s9: the total control unit adjusts the temperature value of the cavity surface temperature check point to be stable within a preset temperature range;
s10: and (3) finishing vulcanization, recording and archiving to a database, and outputting the vulcanized tire.
Optionally, in the step S2, if there are flow templates of the same specification tires and the target temperature values, the tires are vulcanized and heated according to the flow templates, the step S10 is performed, the vulcanized tires are output, or the step S8 is performed.
Optionally, the preset temperature range of the temperature control point is Ti+/-a, a is less than or equal to 2 ℃, the preset temperature fluctuation range of the temperature check point of the connecting surface is b, b is less than or equal to 2 ℃, the difference value between the temperature of the temperature control point and the temperature of the temperature check point of the connecting surface is c, c is less than or equal to 2 ℃, the temperature fluctuation range of the temperature check point of the cavity surface is d, d is less than or equal to 2 ℃, the preset temperature range of the temperature check point of the cavity surface is T0+/-e, e is less than or equal to 2 ℃, and the preset temperature of the temperature check point of the cavity surface is equal to the initial target temperature of the temperature control point.
The technical scheme of the invention has the following advantages:
according to the tire vulcanization heating system and the control method thereof, the tire vulcanization temperature is fed back and regulated through the temperature check point and the temperature control point, the problem that the difference between the actual temperature value of the mold cavity surface and the preset temperature value is too large due to factors such as heat dissipation, heat transfer delay, thermal resistance of the connecting surface and heat transfer distance of the mold is solved, the preset vulcanization temperature is set for the first time, the preset temperature of the temperature control point is constantly reassigned, so that the temperature of the cavity surface gradually reaches the preset vulcanization temperature, the temperature of the cavity surface is ensured to be stable within a preset range, and the tire vulcanization quality and efficiency are improved; the independent control of the heating units realizes the zonal heating, and further improves the vulcanization quality and efficiency; further, through setting the temperature control points of the connecting surface and the temperature control points of the cavity surface at the same time, the problem of temperature overshoot caused by overlong heat transfer distance is reduced, and the tire vulcanization temperature is further ensured to be stabilized in a preset range.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of an embodiment of a tire curing heating system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an embodiment of a tire curing heating system according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of the heating unit and the temperature feedback device in the embodiment of the present invention in the set position on the mold;
FIG. 4 is another schematic diagram of the placement of a heating unit and a temperature feedback device on a mold in accordance with an embodiment of the present invention;
FIG. 5 is another schematic diagram of the placement of a heating unit and a temperature feedback device on a mold in accordance with an embodiment of the present invention;
FIG. 6 is a schematic diagram of module connection during induction heating in an embodiment of the present invention;
FIG. 7 is a schematic diagram showing the connection of modules during resistive heating in the embodiment of the present invention;
FIG. 8 is a flowchart of an example of a control method of the tire curing heating system provided in an embodiment of the present invention;
FIG. 9 is a flowchart of another example of a control method of the tire curing heating system provided in an embodiment of the present invention.
Reference numerals:
1-guide ring, 2-upper base plate, 3-lower base plate, 4-upper sidewall plate, 5-lower sidewall plate, 6-tread mold,
7-heating unit, 8-heating position temperature detection device, 9-junction surface temperature detection device, 10-cavity surface temperature detection device, 11-hot plate.
Detailed Description
In order to make the present invention better understood by those skilled in the art, the following description will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments, but not intended to limit the scope of the present disclosure. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the concepts of the present disclosure. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
Example 1
An embodiment of the present invention provides a tire curing heating system, comprising: tire mould and hot plate 11, hot plate 11 is located the upper and lower both sides of mould still includes: at least one heating unit 7 provided at a preset position of the tire mold and/or the heating plate 11; the at least one control unit is correspondingly connected with the at least one heating unit 7 and is used for regulating and controlling the heating unit 7; the temperature measuring units are arranged at preset positions close to the heating unit 7, the connecting surface of the die part and/or the surface of the die cavity, and are used for detecting the temperature of the arranged positions and feeding back the temperature to the control unit; and the master control unit is connected with the at least one control unit and used for controlling the cavity surface of the tire mold to gradually reach the target vulcanization temperature. The control units may be in one-to-one correspondence with the heating units 7, or one control unit may be in correspondence with a plurality of heating units 7. As shown in fig. 1, the embodiment of the present invention takes a one-to-one correspondence connection of a plurality of heating units 7 and control units as an example.
Specifically, in the present embodiment, as shown in fig. 2, the control unit includes: the external power supply is connected with the heating unit 7 through the power regulating unit, the operation unit is respectively connected with the power regulating unit, the temperature measuring unit and the communication unit, and the communication unit is connected with the master control unit.
In the embodiment of the invention, a temperature feedback device is also provided, comprising: a heating position temperature detecting device 8 provided at a position 5mm to 10mm from the heating unit as a temperature control point; a junction temperature detecting device 9 arranged at a position 5mm-10mm away from the junction of the mold parts as a junction temperature check point; the cavity surface temperature detection device 10 is arranged at a position 5mm-10mm away from the surface of the die cavity and is used as a cavity surface temperature check point. When a plurality of control units are provided, preferably one temperature measuring unit is connected to the junction surface temperature detecting device 9, one temperature measuring unit is connected to the cavity surface temperature detecting device 10, and the junction surface temperature control point temperature value data and the cavity surface temperature control point temperature value data are shared by the master control unit.
The tire mold comprises a mold shell assembly and a mold cavity assembly, wherein the mold cavity assembly is arranged on the inner side of the mold shell assembly, the mold cavity assembly defines a cavity for vulcanizing a tire, at least one mold shell component is a heating component and is provided with at least one heating unit 7, and the inner side of the mold shell component is provided with a corresponding mold cavity component. In one embodiment, as shown in fig. 3, the tire mold is a segmented mold, the mold shell assembly comprises a guide ring 1, an upper base plate 2, a lower base plate 3, and the cavity assembly comprises an upper sidewall plate 4, a lower sidewall plate 5, and a tread mold 6. The outer wall of the guide ring 1 is provided with a plurality of heating units 7, each heating unit 7 is correspondingly provided with at least one heating position temperature detection device 8, at least one connecting surface temperature detection device 9 is arranged near the connecting surface position of the guide ring and the tread mold, and at least one cavity surface temperature detection device 10 is arranged near the cavity surface position of the tread mold 6.
In a specific embodiment, as shown in fig. 4, 1 to 6 heating position temperature detecting devices 8 corresponding to the heating unit 7 are provided, and when the number of the heating position temperature detecting devices 8 is plural, the average value is taken as the temperature of the temperature control point; the number of the connecting surface temperature detection devices 9 corresponding to the positions of the connecting surfaces is 1-6, and when the number of the connecting surface temperature detection devices 9 is multiple, the average value of the connecting surface temperature detection devices is taken as the temperature of the connecting surface temperature check point; the number of the cavity surface temperature detection devices 10 corresponding to the cavity part is 1-6, and when the number of the cavity surface temperature detection devices 10 close to the cavity surface position of the tread mold 6 is more, the average value is taken as the temperature of the cavity surface temperature check point.
In another embodiment, as shown in fig. 5, the surfaces of the upper substrate 2 and the lower substrate 3 of the tire mold are respectively provided with a heating plate 11, at least one heating unit 7 is arranged on the heating plate 11, at least one heating position temperature detection device 8 is arranged near each heating unit 7, and at least one connection surface temperature detection device 9 is arranged near the connection surface of the heating plate 11 and the upper substrate 2 and near the connection surface of the heating plate 11 and the lower substrate 3; and/or at least one connecting surface temperature detection device 9 is arranged near the connecting surface position of the base plate and the sidewall plate, and/or at least one cavity surface temperature detection device 10 is arranged near the cavity surface position of the sidewall plate.
In an embodiment, as shown in fig. 6, the heating mode may be induction heating, the heating unit is an induction heating coil, and the power adjusting unit includes: the device comprises a rectifying unit, a voltage regulating unit and an inversion unit, wherein the rectifying unit can be a rectifier and is used for converting external alternating current into direct current; the voltage regulating unit can be provided with a Buck/Boost step-up and step-down circuit which is respectively connected with the rectifying unit, the inverting unit and the operation unit and is used for regulating the power of the heating unit 7 by regulating the voltage; the inverter unit may be an inverter, and is connected to the heating unit 7, so as to convert the direct current into high-frequency alternating current, generally more than 2000 hz, to implement induction heating of the vulcanizing system.
In another embodiment, as shown in fig. 7, the heating mode may be resistive heating, and the heating unit is an electric heating tube. The power adjusting unit is a relay, and an external power supply is connected with the heating unit 7 through the power adjusting unit in sequence. The operation unit is respectively connected with the power adjusting unit, the communication unit and the temperature measuring unit, the communication unit is connected with the master control unit, and the relay is used for adjusting the power through current on-off.
The tire vulcanization heating system provided by the invention can synchronously control a plurality of heating units by using the temperature check points to realize uniform heating, can also independently control part of the temperature check points and the corresponding part(s) of the heating units to realize partition heating (for example, independently control the temperature of the cavity surface of the tread mold 6, the temperature of the cavity surface of the upper sidewall plate 4 and the temperature of the cavity surface of the lower sidewall plate 5 or independently control the temperatures of the cavity surfaces of different positions of a certain cavity part), and further improves vulcanization quality and efficiency.
The tire vulcanization heating system provided by the invention can be provided with only the cavity surface temperature detection device 10, and can also be provided with the connecting surface temperature detection device 9 and the cavity surface temperature detection device 10 at the same time, so that the problem of temperature overshoot caused by overlong heat transfer distance is reduced, and the tire vulcanization temperature is further ensured to be stable within a preset range.
Example 2
The embodiment of the invention provides a control method of a tire vulcanization heating system, which comprises the following steps:
s1: the total control unit receives tire specification information to be vulcanized and heated and a target temperature value Ti (i=1, 2, 3, 4, 5, 6 …) in response to the heating start command;
s2: inquiring whether the process templates of the tires with the same specification and the target temperature values exist in the database, and executing S3 if the process templates of the tires with the same specification and the target temperature values do not exist, as shown in FIG. 8; if the process templates of the tires with the same specification and the target temperature value exist, executing S8, or as shown in FIG. 9, vulcanizing and heating the tires according to the process templates, executing S10, and outputting the vulcanized tires;
s3: the total control unit sends an instruction to the control unit to adjust the temperature of the temperature control point area to reach the target temperature Ti;
s4: monitoring whether the temperature of the temperature control point is stable within a preset temperature range Ti+/-a, and switching to S5 or S7 after the temperature of the temperature control point is stable within the preset temperature range;
s5: detecting whether the temperature fluctuation range b of the temperature check point of the connecting surface is within a preset temperature range, and switching to S6 after the temperature fluctuation range b of the temperature check point of the connecting surface is within the preset temperature range;
s6: calculating whether a difference value c between the temperature of the temperature control point and the temperature of the connecting surface temperature check point is within a preset range or not, if not, feeding back the sum of the current target temperature value and the difference value as an updated target temperature value to a total control unit for reassigning the target temperature of the temperature control point, and if so, turning to a step S7;
s7: detecting whether the temperature fluctuation range d of the temperature check point of the cavity surface is within a preset temperature range, and switching to S8 after the temperature fluctuation range d of the temperature check point of the cavity surface is within the preset temperature range;
s8: calculating whether a difference value e between an initial target temperature value of the temperature control point and a temperature value of a temperature check point of the cavity surface is within a preset range or not, if not, feeding back the sum of the current target temperature value and the difference value as an updated target temperature value to a total control unit for reassigning the target temperature of the temperature control point, and if so, turning to S9;
step S9: the total control unit adjusts the temperature check point of the cavity surface to be stable within a preset temperature range T0 + -e;
step S10: and (3) finishing vulcanization, outputting the vulcanized tire, recording and archiving to a database.
In the embodiment of the invention, in S4, the preset temperature range of the temperature control point is Ti+/-a, a is less than or equal to 2 ℃, preferably a is less than or equal to 1 ℃, more preferably a is less than or equal to 0.2 ℃, the temperature of the temperature control point is detected for a set number of times at a set frequency, and when the temperature detection values are within Ti+/-a, the condition can be judged to be satisfied; s5, the preset temperature fluctuation range of the temperature check point of the connecting surface is b, b is less than or equal to 2 ℃, preferably b is less than or equal to 1 ℃, more preferably b is less than or equal to 0.2 ℃, namely the difference value b between the highest temperature value and the lowest temperature value of the temperature check point of the detecting connecting surface in the set time and the set detection frequency is within the preset range, and the condition can be judged to be met; s6, detecting and calculating the set times of the temperature control point temperature and the temperature of the connecting surface temperature check point at a set frequency, wherein the difference value c between the temperature control point temperature and the temperature of the connecting surface temperature check point is less than or equal to 2 ℃, preferably less than or equal to 1 ℃, more preferably less than or equal to 0.2 ℃, and when the difference value c is within a preset range, judging that the condition is met; s7, judging that the temperature fluctuation range of the temperature check point of the cavity surface is d, wherein d is less than or equal to 2 ℃, preferably d is less than or equal to 1 ℃, more preferably d is less than or equal to 0.2 ℃, namely, the difference value d between the highest temperature value and the lowest temperature value of the temperature check point of the detected cavity surface in the set time and the set detection frequency is within a preset range, and then judging that the condition is met; s8, detecting the temperature of the temperature check point of the cavity surface for a set number of times with a set frequency in a range of T0 + -e, wherein e is less than or equal to 2 ℃, preferably e is less than or equal to 1 ℃, more preferably e is less than or equal to 0.2 ℃, the preset temperature of the temperature check point of the cavity surface is equal to the initial target temperature of the temperature control point, and when the temperature detection values are within T0 + -e, the condition can be judged to be satisfied; the frequency of the setting in the above steps S4, S5, S6, S7, S8 may be selected to be 0.1 to 2 seconds/time, preferably 0.1 to 1 seconds/time, for example 0.2 seconds/time, and the setting may be selected to be 5 to 30 times, for example 10 times.
In the invention, due to reasons such as heat dissipation, heat transfer delay, thermal resistance of a connecting surface, heat transfer distance and the like of the mold in the heating process, the temperature of the temperature control point and the temperature of the connecting surface in the embodiment of the invention can be larger than the temperature of the temperature check point of the cavity surface, and the temperature of the temperature check point of the cavity surface is controlled by considering a plurality of factors such as heat loss and the like so as to finally reach the target vulcanization temperature.
According to the control method of the tire vulcanization heating system, after the same parameters are confirmed through searching the database, the system can be regulated and controlled through the cavity surface temperature check points as shown in the flow chart 8, the system can be vulcanized according to the set parameters directly as shown in the flow chart 9, and the system is regulated and controlled preferably through the cavity surface temperature check points, so that the problem of heat transfer difference caused by the difference of mold connection, cavity parts and the like is avoided.
The tire vulcanizing heating system of the present invention may be provided with only the cavity surface temperature detecting device, and when only the cavity surface temperature detecting device is provided, the control method of the tire vulcanizing heating system cancels S5 and S6.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present invention.
Claims (8)
1. The utility model provides a tire vulcanization heating system, includes tire mould and hot plate, the hot plate is located the upper and lower both sides of mould, its characterized in that still includes:
at least one heating unit arranged at a preset position of the tire mold and/or the heating plate;
the at least one control unit is correspondingly connected with the at least one heating unit and is used for regulating and controlling the heating unit, and the control unit comprises: the external power supply is connected with the heating unit through the power adjusting unit, the operation unit is respectively connected with the power adjusting unit, the communication unit and the temperature measuring unit, and the communication unit is connected with the master control unit;
the temperature feedback devices are arranged at preset positions close to the heating unit, the die part connecting surface and the die cavity surface and are used for detecting the temperature of the arranged positions and feeding back the temperature to the control unit;
and the master control unit is connected with the at least one control unit and used for controlling the cavity surface of the tire mold to gradually reach the target vulcanization temperature.
2. The tire curing heating system of claim 1, wherein the heating unit is an induction heating coil, and the power conditioning unit includes: rectifying unit, voltage regulation unit and contravariant unit, wherein:
the rectification unit is used for converting external alternating current into direct current;
the voltage regulating unit is respectively connected with the rectifying unit, the inversion unit and the operation unit and is used for regulating the power of the heating unit by regulating the voltage;
and the inversion unit is connected with the heating unit and is used for converting direct current into high-frequency alternating current.
3. The tire curing heating system of claim 1, wherein the heating unit is an electric heating tube and the power conditioning unit includes: and the relay is respectively connected with the heating unit and the operation unit and is used for adjusting the power of the heating unit through current on-off.
4. The tire curing heating system of claim 1, wherein the tire mold is a segmented mold comprising a guide ring, an upper base plate, a lower base plate, an upper sidewall plate, a lower sidewall plate, and a tread mold, and the heating unit is disposed on an outer wall of the guide ring of the mold, and/or an upper base plate, and/or a lower base plate surface, and/or a heating plate.
5. The tire curing heating system of claim 1, wherein said temperature feedback device comprises:
the heating position temperature detection device is arranged at a position 5mm-10mm away from the heating unit and is used as a temperature control point;
the connecting surface temperature detection device is arranged at a position 5mm-10mm away from the connecting surface of the die part and is used as a connecting surface temperature check point;
the cavity surface temperature detection device is arranged at a position 5mm-10mm away from the surface of the die cavity and is used as a cavity surface temperature check point.
6. The tire curing heating system of claim 5, wherein the plurality of heating units simultaneously control the overall uniform curing heating of the tire or independently control the zone curing heating of the partial heating units.
7. A control method of a tire curing heating system, characterized in that the control method is based on the tire curing heating system according to any one of claims 1 to 6, comprising:
s1: the total control unit responds to the heating starting instruction and receives the tire specification information and the target temperature value to be vulcanized and heated;
s2: inquiring whether a flow template with the same specification tire and a target temperature value exists in a database, if the flow template with the same specification tire and the target temperature value does not exist, executing S3, if the flow template with the same specification tire and the target temperature value exists, vulcanizing and heating the tire according to the flow template, executing S10, outputting the vulcanized tire, or executing S8;
s3: the total control unit sends an instruction to the control unit to adjust the temperature of the temperature control point area to reach the target temperature;
s4: monitoring whether the temperature of the temperature control point is stabilized within a preset temperature range, and executing S5 or S7 when the temperature of the temperature control point is stabilized within the preset temperature range;
s5: detecting whether the temperature fluctuation range of the temperature check point of the connecting surface is within a preset temperature range, and executing S6 when the temperature fluctuation range of the temperature check point of the connecting surface is within the preset temperature range;
s6: calculating whether the difference value between the target temperature value of the temperature control point and the temperature value of the temperature check point of the connecting surface is within a preset range, if so, executing S7, and if not, feeding back the sum of the current target temperature value and the difference value as an updated target temperature value to a total control unit to reassign the target temperature of the temperature control point;
s7: detecting whether the temperature fluctuation range of the temperature check point of the cavity surface is within a preset temperature range, and executing S8 after the temperature fluctuation range of the temperature check point of the cavity surface is within the preset temperature range;
s8: calculating whether the difference value between the initial target temperature value of the temperature control point and the temperature value of the temperature check point of the cavity surface is within a preset range, if so, executing S9, and if not, feeding back the sum of the current target temperature value and the difference value as an updated target temperature value to a total control unit to reassign the target temperature of the temperature control point;
s9: the total control unit adjusts the temperature value of the cavity surface temperature check point to be stable within a preset temperature range;
s10: and (3) finishing vulcanization, recording and archiving to a database, and outputting the vulcanized tire.
8. A method of controlling a tire curing heating system as set forth in claim 7, wherein,
the preset temperature range of the temperature control point is Ti+/-a, a is less than or equal to 2 ℃, the preset temperature fluctuation range of the temperature check point of the connecting surface is b, b is less than or equal to 2 ℃, the difference value between the temperature of the temperature control point and the temperature of the temperature check point of the connecting surface is c, c is less than or equal to 2 ℃, the temperature fluctuation range of the temperature check point of the cavity surface is d, d is less than or equal to 2 ℃, the preset temperature range of the temperature check point of the cavity surface is T0+/-e, e is less than or equal to 2 ℃, and the preset temperature of the temperature check point of the cavity surface is equal to the initial target temperature of the temperature control point.
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| CN202310891490.8A CN116604855B (en) | 2023-07-20 | 2023-07-20 | Tire vulcanization heating system and control method |
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| CN202310891490.8A CN116604855B (en) | 2023-07-20 | 2023-07-20 | Tire vulcanization heating system and control method |
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| CN116604855B true CN116604855B (en) | 2023-09-22 |
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| CN116278094A (en) * | 2023-01-07 | 2023-06-23 | 深圳塑能节能装备有限公司 | Electromagnetic induction heating coil plate for hot plate of tire vulcanizer, equipment and control method |
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| JP2006224417A (en) * | 2005-02-17 | 2006-08-31 | Bridgestone Corp | Vulcanizer |
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| CN116604855A (en) | 2023-08-18 |
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