CN113238597A - Temperature rise control method for initial stage of feeding system - Google Patents
Temperature rise control method for initial stage of feeding system Download PDFInfo
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Abstract
The invention discloses a temperature rise control method for an initial stage of a feeding system, which is used for: the material flow of the feeding system comprises a plurality of temperature control points, and the feeding system adopts a heat source which can be independently controlled at each temperature control point; the temperature rise control method comprises the following steps: s1, obtaining the temperature rising characteristics of each temperature control point under each heat source; s2, according to the obtained temperature rising characteristics of the temperature control points, finishing the temperature rising control of the temperature control points on the feeding system by adopting any one of the following modes: the first method is as follows: the time difference that each temperature control point reaches the target temperature is reduced by adopting a mode that the heat source on the temperature control point with longer temperature rise time works before the heat source on the temperature control point with shorter temperature rise time; the second method comprises the following steps: the time difference that each temperature control point reaches the target temperature is reduced by adopting a mode of reducing the power of the heat source on the temperature control point with shorter time for temperature rise. By the temperature rise control method, not only is the temperature rise control automation convenient to realize, but also the energy utilization can be effectively optimized, and the material waste which possibly occurs is reduced.
Description
Technical Field
The invention relates to the technical field of temperature control, in particular to a temperature rise control method for an initial stage of a feeding system.
Background
In the prior art, for a feeding system production system including multiple temperature control points, such as a profile extrusion system (or on a single profile extruder), a plastic extrusion system (or on a single plastic extruder), an injection molding system (or on a single plastic extruder), other hot runner devices or systems, etc., on a material feeding system, due to different temperatures or temperature rise requirements of materials at different positions, multiple-stage heating may be adopted, and different heating characteristics (such as different heating powers, different absorption and dissipation characteristics, heated volumes, specific heat of materials, etc.) and different target temperatures are generally provided at different heating stages.
In the prior art, as the technical solution provided in the patent application with application number CN201911169721.4, an automatic temperature control technology and an automatic correction technology are widely applied to temperature control of a production system, and the conventional method is as follows: temperature sensors are arranged on temperature measuring points of different temperature control areas of the material heating area, the feedback of the temperature sensors is utilized to control the heating power in real time, and the purpose of facilitating the product quality is achieved after a reasonable temperature environment (generally, specific temperature values of all the temperature control areas are obtained and maintained) is obtained through the established relation between the product quality and the temperature. Therefore, in actual use, for heating each temperature control region, because the heating target of each temperature control region is different, the current common practice is: and a control mode of stabilizing the temperature by adopting a single point (single temperature control area) is adopted.
The method has important significance for the development of industrial technology undoubtedly by optimizing the heating mode of the existing feeding system production system related to a plurality of temperature control points.
Disclosure of Invention
The invention aims to solve the technical problem that the temperature rising mode of the conventional feeding system production system related to a plurality of temperature control points is optimized, and the development of the industrial technology is of great significance undoubtedly.
The purpose of the invention is mainly realized by the following technical scheme:
a temperature rise control method for an initial stage of a feed system, the temperature rise control method being for: on the material flow of the feeding system, a plurality of temperature control points which are used for heating the material are arranged along the material flow, and the feeding system is used for heating each temperature control point by adopting a heat source which can be controlled independently;
the temperature rise control method comprises the following steps:
s1, obtaining the temperature rising characteristics of each temperature control point under each heat source;
s2, according to the obtained temperature rising characteristics of the temperature control points, finishing the temperature rising control of the temperature control points on the feeding system by adopting any one of the following modes:
the first method is as follows: the time difference that each temperature control point reaches the target temperature is reduced by adopting a mode that the heat source on the temperature control point with longer temperature rise time works before the heat source on the temperature control point with shorter temperature rise time;
the second method comprises the following steps: the time difference that each temperature control point reaches the target temperature is reduced by adopting a mode of reducing the power of the heat source on the temperature control point with shorter time for temperature rise.
In the prior art, in the field of profile extrusion, the field of injection molding and extrusion of plastics and rubber, and other fields, fluid flows exist, and in the flowing process, according to the process requirements, on a material feeding system, due to different temperatures or heating requirements of materials at different positions, a sectional multi-section heating or multi-point heating mode may exist, and in different heating sections or heating points, in order to enable specific temperature environments or heating powers of a single heating section or heating point to be determined according to the requirements of the position, a heat source with independently adjustable heating powers is generally adopted to be arranged on each heating section or heating point. In order to facilitate the product quality of the feeding system, with the further popularization and development of automation technology, in the prior art, an integrated control scheme is applied to a feeding system comprising a plurality of temperature control points, but the current application aims to keep the temperature of each temperature control point at the optimal temperature through the integrated control scheme. In the prior art, a related temperature rise strategy aiming at a temperature control point of a feeding system is not provided.
In particular, taking as an example the field of profile extrusion, the field of injection molding and extrusion of plastics and rubbers as mentioned above, in the production of feed systems, the following problems may exist:
1. when a feeding system is started, such as no-load driving of the feeding system, because different temperature control points generally need to consider factors such as temperature environment, heat demand, heat loss and the like required by specific temperature control points when the power and the distribution conditions of a heat source are designed, the different temperature control points generally have different heat source power designs, model selection designs, heating modes, heat transfer mode designs and the like, such as synchronous temperature rise during driving, the temperature control point with the faster temperature rise firstly reaches a target temperature, and energy waste exists and even certain interference is generated for the temperature rise of other temperature control points in the process of waiting for the temperature rise of other temperature control points;
2. for above problem 1, it is comparatively common, when feeding system starts, generally remain in feeding system and leave over the residual material in the material transmission flow after stopping earlier, when feeding system restarts, if adopt all accuse temperature points and all realize the material transmission again after obtaining the target temperature, then have following problem: the temperature control point with the fast temperature rise reaches the target temperature firstly, and in the process of waiting for the temperature rise of other temperature control points, the energy waste problem and the interference problem to other temperature measurement points exist, and the problems can occur: the production situation greatly deviates from the requirements, so that the performance of the produced product is greatly reduced, and more waste products are produced. For example, the residual material in the temperature control point with the faster temperature rise has serious influence on the product qualification rate of the feeding system at the initial stage of production start-up of the feeding system after serious denaturation due to higher heating temperature and longer heating time.
This scheme is to the problem that feeding system exists at the intensification in-process, has proposed one kind to on concrete hardware composition, do: the method comprises the steps that a plurality of temperature control points which are used for heating the material are arranged along the material flow, a feeding system capable of heating the temperature control points by adopting a heat source capable of being controlled independently is adopted, and in a specific control strategy, after the temperature rising characteristic is obtained, the temperature rising characteristic is used as a variable reference, and the specific control strategy is a specific control strategy in a first mode or a second mode, so that the time difference of reaching the target temperature of each temperature control point is reduced. By adopting the method, aiming at the temperature control point with shorter heating time, the purposes of saving the energy consumption of the starting process of the feeding system and reducing the influence of the high-temperature environment and the high-temperature residence time on the deformation of the residual materials are achieved by reducing the high-temperature residence time of the temperature control point in the starting preparation process of the feeding system.
Meanwhile, the temperature rise control strategy provided by the scheme takes the temperature rise characteristic as the guide, and the related control logic can also be realized by adopting a related control circuit and based on computer software, so the scheme also has the characteristic of conveniently realizing the automation of temperature rise control.
As a person skilled in the art, the temperature control point is a specific heating point in the material flow, and the related temperature rise characteristics can be obtained through a temperature rise experiment, wherein the specific temperature rise experiment can be obtained by timing from an initial temperature rise to a target temperature as set forth below, or can be obtained by measuring a temperature rise value in unit time and a temperature rise time required by a unit temperature change interval, and then converting the temperature rise value by a temperature difference between the initial temperature and the target temperature; the heat transfer performance and the heat loss performance can be calculated by combining the heating power of the heat source and the specific heat transfer performance and heat loss performance. Preferably, if the temperature rising characteristic acquisition efficiency is taken into consideration and the temperature rising characteristic is taken into consideration, the above temperature rising characteristic is preferably obtained in a measurement manner; as in the case of having raw data as a reference, in order to facilitate the control accuracy, it is preferable to adopt a manner of utilizing the time required to complete the entire temperature rise period. Further, in order to facilitate the improvement of the temperature rise characteristic acquisition efficiency, it is preferable to adopt the above-mentioned measurement and conversion method.
Meanwhile, in specific application, if a plurality of temperature control points exist on one straight pipe section, the temperature control points are the same under the theoretical condition of temperature rise characteristic, so that the temperature control points used for heating the material are not limited to all the temperature control points on the feeding system.
The further technical scheme of the temperature rise control method for the initial stage of the feeding system is as follows:
aiming at the working condition that the time required by the temperature rise from the initial temperature to the target temperature is stored or obtained in advance, in order to avoid the influence of measurement and conversion on the amplified temperature rise characteristic error, the control precision is not favorable, and the working condition is set as follows: in S1, the temperature-rise characteristic is a time required for the temperature-control point to rise from the initial temperature to the target temperature. When this scheme is specifically used, if adopt the computer to accomplish the required time record of intensification and utilize the database to accomplish the required time storage of intensification, the preferred setting is: the time required by temperature rise recorded in a single temperature rise period is used as a training model of the final time required by temperature rise, so that the finally adopted time precision required by temperature rise is continuously optimized in the continuous application of the feeding system.
For the situation that the time required for temperature rise is not available for reference in the past, in order to be beneficial to obtaining the efficiency of the temperature rise characteristic, the following steps are set: in S1, the temperature increase characteristic is a temperature increase rate at the temperature control point. In this embodiment, the temperature increase rate is obtained by converting the temperature increase value per unit time, the temperature increase time per unit temperature change interval, and the temperature difference between the initial temperature and the target temperature. More specifically, after a feeding system is started for the first time, the material storage amount in the material flow is changed, the material type in the material flow is changed, and a heat source of a temperature control point is replaced or overhauled, the specific working mode of the heat source is quickly matched by adopting the mode that the temperature rising characteristic is the temperature rising speed of the temperature control point and combining with relevant conversion; if each temperature control point of the feeding system has a time reference required for temperature rise, the specific time required for temperature rise is taken as a control basis.
For avoiding as far as possible to have idle time after the target temperature appears on the accuse temperature point to better energy saving does benefit to feeding system product quality, sets up to: in S2, the temperature control points reach the respective desired target temperatures at the same time.
As a technical scheme for automatically completing temperature rise control based on the existing automatic control technology to realize intelligent and automatic production of a feeding system, the automatic temperature rise control system is provided with the following steps: the temperature rise control method is completed based on an automatic control system;
the automatic control system comprises a storage module and a processing module;
the storage module is used for storing the temperature rise characteristics of each temperature control point under each heat source;
the processing module controls the working mode of the heat source corresponding to each temperature control point by calling the temperature rise characteristic, and completes the temperature rise control of each temperature control point on the feeding system by the first mode or the second mode.
As described above, in order to enable the temperature rise characteristic to be autonomously optimized during the use of the feeding system, the following settings are provided: the temperature control system further comprises a machine self-learning module used for obtaining the temperature rising characteristics of the temperature control points, and the temperature rising characteristics on the storage module are derived from the machine self-learning module. When the self-learning machine is specifically used, whether the self-learning machine module works is set to be manually controllable or automatically judged according to conditions: if the feeding system is used for the first time after the first-time driving, the temperature control point heat source replacement or the maintenance, and the user judges that the operation working condition to be executed does not have guiding significance for the later use according to experience, the condition or significance of the self-learning of the machine does not exist at the moment, and the closing setting of the self-learning module of the machine can be completed through the system judgment or the manual operation mode at the moment. When the feeding system only has material flow change and material type change, and the user judges that the operation condition to be executed can have guiding significance for later use according to experience, the starting setting of the machine self-learning module can be completed through system judgment or manual operation.
As described above, in order to enable the temperature rise characteristic to be obtained quickly, so as to improve the corresponding speed of the temperature rise control method and improve the start preparation efficiency of the feeding system, the method is configured as follows: the machine self-learning module comprises a measuring circuit, and the measuring circuit obtains the temperature rising characteristics of each temperature control point under each heat source by measuring the temperature rising speed of the heat source on each temperature control point during working.
As a technical scheme for realizing manual intervention and applying manual judgment and experience to the temperature rise control method, the method is set as follows: the temperature rising characteristics in the storage module can be recorded manually.
In conclusion, compared with the prior art, the invention has the following beneficial effects:
this scheme is to the problem that feeding system exists at the intensification in-process, has proposed one kind to on concrete hardware composition, do: the method comprises the steps that a plurality of temperature control points which are used for heating the material are arranged along the material flow, a feeding system capable of heating the temperature control points by adopting a heat source capable of being controlled independently is adopted, and in a specific control strategy, after the temperature rising characteristic is obtained, the temperature rising characteristic is used as a variable reference, and the specific control strategy is a specific control strategy in a first mode or a second mode, so that the time difference of reaching the target temperature of each temperature control point is reduced. By adopting the method, aiming at the temperature control point with shorter heating time, the purposes of saving the energy consumption of the starting process of the feeding system and reducing the influence of the high-temperature environment and the high-temperature residence time on the deformation of the residual materials are achieved by reducing the high-temperature residence time of the temperature control point in the starting preparation process of the feeding system.
Meanwhile, the temperature rise control strategy provided by the scheme takes the temperature rise characteristic as the guide, and the related control logic can also be realized by adopting a related control circuit and based on computer software, so the scheme also has the characteristic of conveniently realizing the automation of temperature rise control.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a schematic diagram of an embodiment of a method for controlling temperature rise in an initial stage of a feeding system according to the present invention;
fig. 2 is a specific temperature rise control logic diagram of an embodiment of the temperature rise control method for the initial stage of the feeding system, which includes three temperature measurement points.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Example 1:
as shown in fig. 1 and 2, the present embodiment relates to a temperature rise control method for an initial stage of a feed system, the temperature rise control method being configured to: on the material flow of the feeding system, a plurality of temperature control points which are used for heating the material are arranged along the material flow, and the feeding system is used for heating each temperature control point by adopting a heat source which can be controlled independently;
the temperature rise control method comprises the following steps:
s1, obtaining the temperature rising characteristics of each temperature control point under each heat source;
s2, according to the obtained temperature rising characteristics of the temperature control points, finishing the temperature rising control of the temperature control points on the feeding system by adopting any one of the following modes:
the first method is as follows: the time difference that each temperature control point reaches the target temperature is reduced by adopting a mode that the heat source on the temperature control point with longer temperature rise time works before the heat source on the temperature control point with shorter temperature rise time;
the second method comprises the following steps: the time difference that each temperature control point reaches the target temperature is reduced by adopting a mode of reducing the power of the heat source on the temperature control point with shorter time for temperature rise.
In the prior art, in the field of profile extrusion, the field of injection molding and extrusion of plastics and rubber, and other fields, fluid flows exist, and in the flowing process, according to the process requirements, on a material feeding system, due to different temperatures or heating requirements of materials at different positions, a sectional multi-section heating or multi-point heating mode may exist, and in different heating sections or heating points, in order to enable specific temperature environments or heating powers of a single heating section or heating point to be determined according to the requirements of the position, a heat source with independently adjustable heating powers is generally adopted to be arranged on each heating section or heating point. In order to facilitate the product quality of the feeding system, with the further popularization and development of automation technology, in the prior art, an integrated control scheme is applied to a feeding system comprising a plurality of temperature control points, but the current application aims to keep the temperature of each temperature control point at the optimal temperature through the integrated control scheme. In the prior art, a related temperature rise strategy aiming at a temperature control point of a feeding system is not provided.
In particular, taking as an example the field of profile extrusion, the field of injection molding and extrusion of plastics and rubbers as mentioned above, in the production of feed systems, the following problems may exist:
1. when a feeding system is started, such as no-load driving of the feeding system, because different temperature control points generally need to consider factors such as temperature environment, heat demand, heat loss and the like required by specific temperature control points when the power and the distribution conditions of a heat source are designed, the different temperature control points generally have different heat source power designs, model selection designs, heating modes, heat transfer mode designs and the like, such as synchronous temperature rise during driving, the temperature control point with the faster temperature rise firstly reaches a target temperature, and energy waste exists and even certain interference is generated for the temperature rise of other temperature control points in the process of waiting for the temperature rise of other temperature control points;
2. for above problem 1, it is comparatively common, when feeding system starts, generally remain in feeding system and leave over the residual material in the material transmission flow after stopping earlier, when feeding system restarts, if adopt all accuse temperature points and all realize the material transmission again after obtaining the target temperature, then have following problem: the temperature control point with the fast temperature rise reaches the target temperature firstly, and in the process of waiting for the temperature rise of other temperature control points, the problems of energy waste and interference on other temperature measurement points exist, and after the residual materials in the temperature control point with the fast temperature rise are seriously denatured due to the high heating temperature and the long heating time, the product qualification rate of the feeding system is seriously influenced at the initial stage of production start of the feeding system.
This scheme is to the problem that feeding system exists at the intensification in-process, has proposed one kind to on concrete hardware composition, do: the method comprises the steps that a plurality of temperature control points which are used for heating the material are arranged along the material flow, a feeding system capable of heating the temperature control points by adopting a heat source capable of being controlled independently is adopted, and in a specific control strategy, after the temperature rising characteristic is obtained, the temperature rising characteristic is used as a variable reference, and the specific control strategy is a specific control strategy in a first mode or a second mode, so that the time difference of reaching the target temperature of each temperature control point is reduced. By adopting the method, aiming at the temperature control point with shorter heating time, the purposes of saving the energy consumption of the starting process of the feeding system and reducing the influence of the high-temperature environment and the high-temperature residence time on the deformation of the residual materials are achieved by reducing the high-temperature residence time of the temperature control point in the starting preparation process of the feeding system.
Meanwhile, the temperature rise control strategy provided by the scheme takes the temperature rise characteristic as the guide, and the related control logic can also be realized by adopting a related control circuit and based on computer software, so the scheme also has the characteristic of conveniently realizing the automation of temperature rise control.
As a person skilled in the art, the temperature control point is a specific heating point in the material flow, and the related temperature rise characteristics can be obtained through a temperature rise experiment, wherein the specific temperature rise experiment can be obtained by timing from an initial temperature rise to a target temperature as set forth below, or can be obtained by measuring a temperature rise value in unit time and a temperature rise time required by a unit temperature change interval, and then converting the temperature rise value by a temperature difference between the initial temperature and the target temperature; the heat transfer performance and the heat loss performance can be calculated by combining the heating power of the heat source and the specific heat transfer performance and heat loss performance. Preferably, if the temperature rising characteristic acquisition efficiency is taken into consideration and the temperature rising characteristic is taken into consideration, the above temperature rising characteristic is preferably obtained in a measurement manner; as in the case of having raw data as a reference, in order to facilitate the control accuracy, it is preferable to adopt a manner of utilizing the time required to complete the entire temperature rise period. Further, in order to facilitate the improvement of the temperature rise characteristic acquisition efficiency, it is preferable to adopt the above-mentioned measurement and conversion method.
Meanwhile, in specific application, if a plurality of temperature control points exist on one straight pipe section, the temperature control points are the same under the theoretical condition of temperature rise characteristic, so that the temperature control points used for heating the material are not limited to all the temperature control points on the feeding system.
Example 2:
this example is further detailed on the basis of example 1:
aiming at the working condition that the time required by the temperature rise from the initial temperature to the target temperature is stored or obtained in advance, in order to avoid the influence of measurement and conversion on the amplified temperature rise characteristic error, the control precision is not favorable, and the working condition is set as follows: in S1, the temperature-rise characteristic is a time required for the temperature-control point to rise from the initial temperature to the target temperature. When this scheme is specifically used, if adopt the computer to accomplish the required time record of intensification and utilize the database to accomplish the required time storage of intensification, the preferred setting is: the time required by temperature rise recorded in a single temperature rise period is used as a training model of the final time required by temperature rise, so that the finally adopted time precision required by temperature rise is continuously optimized in the continuous application of the feeding system.
Example 3:
this example is further detailed on the basis of example 1:
for the situation that the time required for temperature rise is not available for reference in the past, in order to be beneficial to obtaining the efficiency of the temperature rise characteristic, the following steps are set: in S1, the temperature increase characteristic is a temperature increase rate at the temperature control point. In this embodiment, the temperature increase rate is obtained by converting the temperature increase value per unit time, the temperature increase time per unit temperature change interval, and the temperature difference between the initial temperature and the target temperature. More specifically, after a feeding system is started for the first time, the material storage amount in the material flow is changed, the material type in the material flow is changed, and a heat source of a temperature control point is replaced or overhauled, the specific working mode of the heat source is quickly matched by adopting the mode that the temperature rising characteristic is the temperature rising speed of the temperature control point and combining with relevant conversion; if each temperature control point of the feeding system has a time reference required for temperature rise, the specific time required for temperature rise is taken as a control basis.
Example 4:
this example is further detailed on the basis of example 1:
for avoiding as far as possible to have idle time after the target temperature appears on the accuse temperature point to better energy saving does benefit to feeding system product quality, sets up to: in S2, the temperature control points reach the respective desired target temperatures at the same time.
Example 5:
this example is further detailed on the basis of example 1:
as a technical scheme for automatically completing temperature rise control based on the existing automatic control technology to realize intelligent and automatic production of a feeding system, the automatic temperature rise control system is provided with the following steps: the temperature rise control method is completed based on an automatic control system;
the automatic control system comprises a storage module and a processing module;
the storage module is used for storing the temperature rise characteristics of each temperature control point under each heat source;
the processing module controls the working mode of the heat source corresponding to each temperature control point by calling the temperature rise characteristic, and completes the temperature rise control of each temperature control point on the feeding system by the first mode or the second mode.
Example 6:
this example is further refined on the basis of example 5:
as described above, in order to enable the temperature rise characteristic to be autonomously optimized during the use of the feeding system, the following settings are provided: the temperature control system further comprises a machine self-learning module used for obtaining the temperature rising characteristics of the temperature control points, and the temperature rising characteristics on the storage module are derived from the machine self-learning module.
Example 7:
this example is further refined on the basis of example 6:
as described above, in order to enable the temperature rise characteristic to be obtained quickly, so as to improve the corresponding speed of the temperature rise control method and improve the start preparation efficiency of the feeding system, the method is configured as follows: the machine self-learning module comprises a measuring circuit, and the measuring circuit obtains the temperature rising characteristics of each temperature control point under each heat source by measuring the temperature rising speed of the heat source on each temperature control point during working.
Example 7:
this example is further refined on the basis of example 5: as a technical scheme for realizing manual intervention and applying manual judgment and experience to the temperature rise control method, the method is set as follows: the temperature rising characteristics in the storage module can be recorded manually.
Example 8:
based on the concept provided by any one of the above embodiments, the present embodiment provides a specific application embodiment based on the temperature rise control method:
as shown in fig. 2, in the material flow of the feeding system, three temperature control points, namely a temperature control point 1, a temperature control point 2 and a temperature control point 3, which are all used for heating the material are included along the material flow;
each temperature control point is heated by adopting a heat source which can be independently controlled, and the heat sources are respectively as follows: a heat source 1 corresponding to the temperature control point 1, a heat source 2 corresponding to the temperature control point 2, and a heat source 3 corresponding to the temperature control point 3;
in order to enable the embodiment to have the function of automatically obtaining the temperature rise characteristic, the temperature rise control system further comprises a measurement conversion module, wherein the measurement conversion module is used for directly obtaining the time required by the temperature rise of the temperature control point from the initial temperature to the target temperature and the temperature rise speed of the temperature control point;
meanwhile, in this embodiment, a storage module and a processing module are provided, a signal input end of the storage module is connected to a signal output end of the measurement conversion module, a signal input end of the processing module is connected to a signal output end of the storage module, and a start/stop or power control module of each heat source is connected to a signal output end of the processing module. This is done: the temperature rising characteristics of all temperature control points are provided for the storage module through the measurement conversion module and stored in the storage module, the temperature rising characteristic data in the processing module are called by the storage module through the processing module, and the temperature rising characteristic data are converted into control signals for all heat sources after data processing, so that the heat source start-stop sequence control or power control is realized.
More specifically, taking the required heating time as an example of the temperature rising characteristic, the required heating times corresponding to the temperature control point 1, the temperature control point 2, and the temperature control point 3 are A, B, C, where a > B > C, and the mode of the processing module controlling the heat source to work is any one of the following modes:
the heat source 1 is started before the heat source 2, the heat source 2 is started before the heat source 3, and finally the three temperature control points reach respective target temperatures at the same time;
the heat source 3 and the heat source 2 are started by reducing power, and finally the three temperature control points reach respective target temperatures at the same time.
The measurement conversion module or the processing module has a self-learning function, and temperature rise characteristic data processed by data are finally called as final parameters finally used for temperature rise control by continuously accumulating the temperature rise characteristic data as training parameters.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. A temperature rise control method for an initial stage of a feed system, the temperature rise control method being for: on the material flow of the feeding system, a plurality of temperature control points which are used for heating the material are arranged along the material flow, and the feeding system is used for heating each temperature control point by adopting a heat source which can be controlled independently;
the temperature rise control method is characterized in that:
s1, obtaining the temperature rising characteristics of each temperature control point under each heat source;
s2, according to the obtained temperature rising characteristics of the temperature control points, finishing the temperature rising control of the temperature control points on the feeding system by adopting any one of the following modes:
the first method is as follows: the time difference that each temperature control point reaches the target temperature is reduced by adopting a mode that the heat source on the temperature control point with longer temperature rise time works before the heat source on the temperature control point with shorter temperature rise time;
the second method comprises the following steps: the time difference that each temperature control point reaches the target temperature is reduced by adopting a mode of reducing the power of the heat source on the temperature control point with shorter time for temperature rise.
2. The method according to claim 1, wherein the temperature increase characteristic is a time required for the temperature control point to increase from the initial temperature to the target temperature in S1.
3. The method according to claim 1, wherein the temperature increase characteristic is a temperature increase rate at the temperature control point in S1.
4. The method as claimed in claim 1, wherein the temperature control points reach the respective desired target temperatures at the same time in S2.
5. The method as claimed in claim 1, wherein the temperature rise control method is performed based on an automatic control system;
the automatic control system comprises a storage module and a processing module;
the storage module is used for storing the temperature rise characteristics of each temperature control point under each heat source;
the processing module controls the working mode of the heat source corresponding to each temperature control point by calling the temperature rise characteristic, and completes the temperature rise control of each temperature control point on the feeding system by the first mode or the second mode.
6. The method as claimed in claim 5, further comprising a machine self-learning module for obtaining the temperature rise characteristics of each temperature control point, wherein the temperature rise characteristics on the storage module are derived from the machine self-learning module.
7. The method as claimed in claim 6, wherein the machine self-learning module comprises a measuring circuit, and the measuring circuit obtains the temperature-rising characteristics of each temperature control point under the respective heat source by measuring the temperature-rising speed of the heat source at each temperature control point during operation.
8. The method as claimed in claim 5, wherein the temperature rising characteristics in the storage module are entered manually.
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| CN202110571288.8A Pending CN113238597A (en) | 2021-05-25 | 2021-05-25 | Temperature rise control method for initial stage of feeding system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114779855A (en) * | 2022-03-21 | 2022-07-22 | 广东三优聚合物装备有限公司 | Synchronous heating method and system for extruder |
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| CN102101353A (en) * | 2009-12-16 | 2011-06-22 | 北京化工大学 | Temperature control method for reaching set temperature at equal time intervals at preheating stage of plastic machinery |
| CN103777662A (en) * | 2014-01-18 | 2014-05-07 | 浙江大学 | Device and method applied in gradient temperature control |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114779855A (en) * | 2022-03-21 | 2022-07-22 | 广东三优聚合物装备有限公司 | Synchronous heating method and system for extruder |
| CN114779855B (en) * | 2022-03-21 | 2024-04-12 | 广东三优聚合物装备有限公司 | Synchronous heating method and system for extruder |
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