CN114953384B - Intelligent temperature control system of injection mold for producing television screen sealing panel - Google Patents
Intelligent temperature control system of injection mold for producing television screen sealing panel Download PDFInfo
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- CN114953384B CN114953384B CN202210572045.0A CN202210572045A CN114953384B CN 114953384 B CN114953384 B CN 114953384B CN 202210572045 A CN202210572045 A CN 202210572045A CN 114953384 B CN114953384 B CN 114953384B
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- 238000002347 injection Methods 0.000 title claims abstract description 154
- 239000007924 injection Substances 0.000 title claims abstract description 154
- 238000007789 sealing Methods 0.000 title claims abstract description 18
- 238000001514 detection method Methods 0.000 claims abstract description 136
- 230000002159 abnormal effect Effects 0.000 claims abstract description 44
- 230000001105 regulatory effect Effects 0.000 claims abstract description 33
- 238000005266 casting Methods 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 11
- 230000001276 controlling effect Effects 0.000 claims abstract description 9
- 238000001746 injection moulding Methods 0.000 claims description 221
- 239000002994 raw material Substances 0.000 claims description 29
- 238000010438 heat treatment Methods 0.000 claims description 16
- 239000000243 solution Substances 0.000 claims description 8
- 230000005856 abnormality Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 238000004321 preservation Methods 0.000 description 5
- 230000003044 adaptive effect Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000011895 specific detection Methods 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010137 moulding (plastic) Methods 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
- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/76—Measuring, controlling or regulating
- B29C45/78—Measuring, controlling or regulating of temperature
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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
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76494—Controlled parameter
- B29C2945/76531—Temperature
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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
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76655—Location of control
- B29C2945/76658—Injection unit
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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
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76655—Location of control
- B29C2945/76732—Mould
-
- 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
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76929—Controlling method
- B29C2945/76939—Using stored or historical data sets
- B29C2945/76943—Using stored or historical data sets compare with thresholds
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The application discloses an intelligent temperature control system of an injection mold for producing a television screen sealing plate, which comprises a temperature detection unit, a temperature regulation unit and a temperature regulation unit, wherein the temperature detection unit is used for detecting temperature information of the injection mold, processing the temperature information to obtain a temperature detection base number, comparing the temperature detection base number with a detection coefficient threshold value, sending a casting temperature abnormal signal of the injection mold obtained after processing to a controller, the injection detection unit is used for receiving the casting temperature abnormal signal of the injection mold sent by the controller, detecting the temperature of the injection mold during operation, and sending the obtained detection signal of the injection mold to the temperature regulation unit, and the temperature regulation unit is used for regulating and controlling the abnormal temperature of the injection mold or the injection mold, wherein when regulating and controlling the temperature of the injection mold, the temperature of the injection mold is kept in the regulation process, the temperature detection base number is monitored for the second time, and the intelligent control of the injection mold for producing the television screen sealing plate is achieved through two-time regulation.
Description
Technical Field
The application relates to the technical field of injection molding, in particular to an intelligent temperature control system of an injection mold for producing a television screen sealing panel.
Background
At present, injection molding is one of the most widely used plastic molding methods, and conventional plastic product injection molding is carried out by injecting plastic melt into an injection mold by using an injection molding machine, and since the molding and cooling of the plastic melt are all completed in the injection mold, the temperature control of the injection mold has very important influence on the quality and molding cycle of the final injection molded product
In the production process of many injection molding parts, because the fluidity of plastic raw materials is poor, the injection mold needs to be heated, the control of the temperature of the injection mold needs to be manually regulated and controlled, the temperature of the injection mold is manually regulated and controlled, errors of artificial influence exist, the control of the temperature of the injection mold and the cooling of the injection mold often need to be carried out by operation workers with abundant experience, and because the stability of the manual operation temperature is not high enough, the temperature control of the injection mold does not reach the technical regulation requirement, thereby influencing the yield of plastic products.
Disclosure of Invention
The application aims to provide an intelligent temperature control system of an injection mold for producing a television screen sealing plate, which is characterized in that temperature information of the injection mold is obtained through a temperature detection unit, a temperature detection base Wi of the injection mold in an injection molding process is obtained, the temperature detection base Wi is compared with a detection coefficient threshold value, a casting temperature normal or abnormal signal of the injection mold is obtained, the casting temperature abnormal signal of the injection mold is transmitted to the injection detection unit, the temperature of the injection mold is judged through the injection detection unit, when the temperature of the injection mold is normal, the injection mold is regulated and controlled through temperature detection, when the temperature of the injection mold is abnormal, the temperature of the injection mold is regulated and controlled, the heat preservation of the injection mold is kept in the regulation and control process, the temperature detection base Wi is monitored for the injection mold for the second time, and the intelligent control of the injection mold for producing the television screen sealing plate is achieved through two-time adjustment.
The aim of the application can be achieved by the following technical scheme:
an intelligent temperature control system of an injection mold for producing a television screen sealing panel, comprising:
a temperature detection unit for detecting temperature information of the injection mold, comparing the temperature detection base obtained by processing the temperature information with a detection coefficient threshold value, sending a pouring temperature abnormal signal of the injection mold obtained by processing to a controller,
the temperature information comprises conventional temperature data before injection molding of the injection mold, temperature change data in the injection molding process and injection molding temperature data in the injection molding process;
the injection molding detection unit is used for receiving the injection molding temperature abnormal signal sent by the controller, detecting the temperature of the injection molding machine during working, and sending the obtained injection molding machine detection signal to the temperature regulation and control unit;
the temperature regulating and controlling unit is used for regulating and controlling abnormal temperature of the injection molding machine or the injection mold.
As a further scheme of the application: a plurality of temperature detection surfaces are arranged in the injection mold, wherein,
the temperature detection surface comprises a central reference point arranged on the inner side surface of the injection mold, a side reference point is established on the inner side surface of the injection mold by taking the central reference point as the central point, the side reference surface is composed of a plurality of side reference points, and heating units are arranged on the central reference point and the side reference points.
As a further scheme of the application: the side reference surface is arranged in a rectangular or annular structure.
As a further scheme of the application: the processing of the temperature detection base comprises the following steps:
s1: the conventional temperature data is the sum of the internal temperature of the injection mold and the external ambient temperature when the injection mold is cast, and is marked as Ci, i=1, 2.
The temperature change data is the ratio of the temperature of the injection mold in casting to the conventional temperature data, and is marked as Ji;
the injection temperature data is the ratio of the original temperature of the injection mold to the temperature inside the mold, and is marked as Bi;
s2: by the formulaAcquiring a temperature detection base Wi of an injection mold, wherein a1, a2 and a3 are preset proportionality coefficients, a1+a2+a3 is not equal to 0, beta is an error correction coefficient, and the value is 0.57;
s3: if the temperature detection base Wi of the injection mold is not less than the detection coefficient threshold, judging that the casting temperature of the injection mold is normal, and generating a temperature normal signal;
if the temperature detection coefficient Wi of the injection mold is smaller than the detection coefficient threshold value, judging that the casting temperature of the injection mold is abnormal, and generating a temperature abnormal signal.
The injection molding detection unit receives the temperature abnormality signal transmitted by the temperature detection unit and detects the standard information of the injection molding machine in the injection molding process, wherein,
the standard information includes raw material temperature data at the time of injection molding, injection molding barrel temperature data at the time of injection molding, and injection molding viscosity data at the time of injection molding.
The standard information is processed as follows:
s1: marking the difference between the temperature data of the raw material during injection molding, namely the temperature of the discharge of the cylinder during injection molding, and the temperature of the pouring opening of the raw material entering the injection mold, as Yi;
marking the ratio of the temperature data of the injection molding machine barrel to the mixing temperature of the raw materials as Ti;
marking the quotient of injection molding viscosity data, which is injection molding barrel pressure data and raw material mixing temperature during injection molding, as Ni;
s2: by the formulaObtaining a temperature detection coefficient Zi of the injection molding machine, wherein d1, d2 and d3 are preset proportional coefficients, d1, d2 and d3 are not equal to 0, kj is an error correction coefficient, and the value is 1.3689;
s3: if the temperature detection coefficient Zi of the injection molding machine is more than or equal to the temperature detection coefficient threshold value of the injection molding machine, judging that the injection molding machine works normally, and generating a normal signal of the injection molding machine;
if the temperature detection coefficient Zi of the injection molding machine is smaller than the threshold value of the temperature detection coefficient of the injection molding machine, judging that the operation of the injection molding machine is abnormal, and generating an abnormal signal of the injection molding machine;
s4: and transmitting the signal of the injection molding machine to a temperature regulation unit.
As a further scheme of the application: when the temperature regulating unit receives abnormal signals of the injection molding machine, the injection molding machine is regulated and controlled as follows:
s1: when the temperature regulating unit receives an abnormal signal of the injection molding machine, the working temperature of the injection molding machine is recorded in real time, and the working temperature is marked as unstable working temperature TZ;
s2: comparing the unstable operating temperature TZ of the injection molding machine with a threshold value of a temperature detection coefficient of the injection molding machine, recording the acting time of the temperature rise of the unstable operating temperature TZ of the injection molding machine to the threshold value of the temperature detection coefficient of the injection molding machine, and marking the heated bearing time as TZi;
s3: the method comprises the steps that the bearing time TZi for raising the unstable working temperature TZ of the injection molding machine to the threshold value of the temperature detection coefficient of the injection molding machine is sent to a controller, the controller sends the received bearing time TZi to an injection mold control unit, and the injection mold is subjected to heat preservation through temperature detection of the injection mold control unit
As a further scheme of the application: when the temperature regulating unit receives a normal signal of the injection molding machine, the injection mold is regulated and controlled as follows:
v1: when the temperature regulating unit receives a normal signal of the injection molding machine, the working temperature of the injection molding machine is recorded in real time, and the working temperature is marked as stable working temperature WTZ;
v2: when the stable working temperature WTZ of the injection molding machine is larger than the threshold value of the temperature detection coefficient of the injection molding machine, marking the stable working temperature WTZ of the injection molding machine as the limit temperature value of the injection molding machine, and when the real-time working temperature of the injection molding machine barrel reaches the limit temperature value, performing no operation on the injection molding machine barrel;
v3: after receiving the non-operation instruction of the injection molding machine barrel, the controller transmits the non-operation instruction to the injection molding machine control unit, and the injection molding machine control unit heats the solution in the injection molding machine by the heating unit for controlling the center reference point and the edge reference point of the temperature detection surface, so that the temperature in the injection molding machine is heated to be not lower than the detection coefficient threshold value of the injection molding machine.
The application has the beneficial effects that:
(1) According to the application, an adaptive temperature detection surface is arranged in the injection mold in advance according to the size of the television screen sealing plate, a central reference point is arranged on the temperature detection surface, an annular or rectangular side reference surface is arranged around the central reference point, independent heating units are arranged on the side reference point and the central reference point of the side reference surface, and the heating of local solution in the injection mold is realized through the heating units, so that the overall injection quality of the injection mold is improved;
(2) According to the application, temperature information of an injection mold is obtained through a temperature detection unit, a temperature detection base Wi of the injection mold in an injection molding process is obtained through processing, the temperature detection base Wi is compared with a detection coefficient threshold value to obtain a normal or abnormal signal of the injection mold pouring temperature, the abnormal signal of the injection mold pouring temperature is transmitted to the injection detection unit, the injection molding machine barrel temperature, the raw material temperature and the raw material viscosity in the injection machine barrel are processed through the injection detection unit, the temperature of the injection machine is judged, when the temperature of the injection machine is normal, the injection mold is regulated and controlled through temperature detection, when the temperature of the injection machine is abnormal, the temperature of the injection machine is regulated and controlled, the heat preservation of the injection mold is kept in the regulation process, the temperature detection base Wi is monitored for the injection mold for the second time, and the intelligent control of the injection mold for producing a television screen sealing plate is achieved through two-time adjustment.
Drawings
The application is further described below with reference to the accompanying drawings.
Fig. 1 is a schematic diagram of the principles of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Referring to fig. 1, the intelligent temperature control system of the injection mold for producing the television screen sealing panel comprises a plurality of temperature detection surfaces arranged in the injection mold, wherein the temperature detection surfaces are respectively matched with the inner side surface of the injection mold, the temperature detection surfaces comprise central reference points, the central reference points are preferably positioned at the central positions of the side surfaces of the injection mold, the side surfaces of the injection mold are centered on the central reference points, and a side reference surface in a rectangular structure or an annular structure is established, and the side reference surface is formed by a plurality of side reference points, so that the temperature detection surfaces can carry out omnibearing detection on the temperature of the injection mold;
the temperature detection unit is used for detecting temperature information of the injection mold, wherein the temperature information comprises conventional temperature data, temperature change data and injection temperature data of the injection mold;
the conventional temperature data is the sum of the internal temperature and the external environment temperature of the injection mold when the injection mold is cast;
the temperature change data is the ratio of the temperature of the injection mold in casting to the conventional temperature data;
the injection molding temperature data is the ratio of the original temperature of the injection mold to the temperature inside the mold during casting;
the specific detection process is as follows:
step one: obtaining the sum of the internal temperature and the external temperature of the injection mold in a conventional state, and marking the sum of the internal temperature and the external temperature of the injection mold in the conventional state as Ci, i=1, 2.
Step two: acquiring the ratio of the temperature of the plastic mold to the conventional temperature data, and marking the ratio of the temperature of the plastic mold to the conventional temperature data as Ji;
step three: obtaining the ratio of the temperature of the raw material to the temperature inside the mold when the injection mold is poured, and marking the ratio of the temperature of the injection mold to the temperature of the injection machine barrel as Bi;
step four: by the formulaAcquiring a temperature detection base Wi of an injection mold, wherein a1, a2 and a3 are preset proportionality coefficients, a1+a2+a3 is not equal to 0, beta is an error correction coefficient, and the value is 0.57;
step five: comparing the temperature detection base Wi of the injection mold with a detection coefficient threshold value:
if the temperature detection base Wi of the injection mold is more than or equal to the detection coefficient threshold value, judging that the casting temperature of the injection mold is normal, generating a temperature normal signal and sending the temperature normal signal to a controller;
if the temperature detection coefficient Wi of the injection mold is smaller than the detection coefficient threshold value, judging that the casting temperature of the injection mold is abnormal, generating a temperature abnormal signal and sending the temperature abnormal signal to the controller, generating a casting detection signal after the controller receives the temperature abnormal signal, and sending the casting detection signal to the injection detection unit.
The injection molding detection unit is used for detecting standard information in an injection molding process, wherein the standard information comprises raw material temperature data during injection molding, injection molding machine barrel temperature data during injection molding and injection molding viscosity data during injection molding;
the temperature data of the raw materials in injection molding is the difference between the discharge temperature of the cylinder and the temperature of the pouring port of the raw materials entering the injection mold in injection molding;
the temperature data of the injection molding machine barrel in injection molding is the ratio of the temperature of the injection molding machine barrel to the mixing temperature of raw materials;
the injection viscosity data during injection molding is the quotient of injection molding barrel pressure data and raw material mixing temperature;
the specific detection process is as follows:
step one: acquiring raw material temperature data during injection molding as the difference between the cylinder discharge temperature and the injection port temperature of the raw material entering an injection mold during injection molding, and marking the difference between the cylinder discharge temperature and the injection port temperature of the raw material entering the injection mold during injection molding as Yi;
step two: acquiring injection molding machine barrel temperature data in injection molding as the ratio of injection molding machine barrel temperature to raw material mixing temperature, and marking the ratio of the injection molding machine barrel temperature data in injection molding as the ratio of the injection molding machine barrel temperature to the raw material mixing temperature as Ti;
step three: acquiring injection viscosity data during injection molding as quotient of injection molding machine barrel pressure data and raw material mixing temperature, and marking the quotient of injection molding viscosity data during injection molding as quotient of injection molding machine barrel pressure data and raw material mixing temperature as Ni;
step four: by the formulaObtaining a temperature detection coefficient Zi of the injection molding machine, wherein d1, d2 and d3 are preset proportional coefficients, d1, d2 and d3 are not equal to 0, kj is an error correction coefficient, and the value is 1.3689;
step five: comparing the temperature detection coefficient Zi of the injection molding machine with a threshold value of the temperature detection coefficient of the injection molding machine:
if the temperature detection coefficient Zi of the injection molding machine is more than or equal to the temperature detection coefficient threshold value of the injection molding machine, judging that the operation of the injection molding machine is normal, generating a normal signal of the injection molding machine, and sending the normal signal of the injection molding machine to a temperature regulation and control unit;
if the temperature detection coefficient Zi of the injection molding machine is smaller than the threshold value of the temperature detection coefficient of the injection molding machine, judging that the operation of the injection molding machine is abnormal, generating an abnormal signal of the injection molding machine, and sending the abnormal signal of the injection molding machine to the temperature regulation and control unit.
The temperature regulation and control unit is used for receiving the normal signal and the abnormal signal of the injection molding machine and selecting different regulation and control mechanisms according to the received normal signal and the abnormal signal of the injection molding machine;
specifically, when the temperature regulation and control unit receives an abnormal signal of the injection molding machine, the injection molding machine is regulated and controlled, and the specific regulation and control are as follows:
s1: when the temperature regulating unit receives an abnormal signal of the injection molding machine, the working temperature of the injection molding machine is recorded in real time, the working temperature is marked as unstable working temperature TZ, and meanwhile, the temperature detection coefficient of the injection molding machine is monitored;
s2: comparing the unstable operating temperature TZ of the injection molding machine with a threshold value of a temperature detection coefficient of the injection molding machine, recording the acting time of the temperature rise of the unstable operating temperature TZ of the injection molding machine to the threshold value of the temperature detection coefficient of the injection molding machine, and marking the heated bearing time as TZi;
s3: the method comprises the steps that the bearing time TZi of the unstable working temperature TZ of the injection molding machine to the threshold value of the temperature detection coefficient of the injection molding machine is sent to a controller, the controller sends the received bearing time TZi to an injection mold control unit, and the injection mold is insulated through temperature detection of the injection mold control unit;
specifically, the unstable working temperature TZ is set to the temperature detection coefficient threshold of the injection molding machine to bear time and timing temperature, when the working temperature of the injection molding machine is increased to the timing temperature, the controller controls the injection molding machine barrel to heat, timing is started at the same time, the injection molding machine barrel is marked as heating time, when the real-time temperature reaches the temperature detection coefficient threshold of the injection molding machine and is in an ascending trend, the predicted closing time is obtained through comparing the bearing time with the heating time, the predicted closing time is sent to the controller, and the controller is transmitted to the injection molding mold control unit to obtain the heat preservation time of the temperature detection surface.
Specifically, when the temperature regulation and control unit receives a normal signal of the injection molding machine, the injection mold is regulated and controlled, and the specific regulation and control are as follows:
v1: when the temperature regulating unit receives a normal signal of the injection molding machine, the working temperature of the injection molding machine is recorded in real time, and is marked as stable working temperature WTZ, and meanwhile, the temperature detection coefficient of the injection molding machine is monitored;
v2: when the stable working temperature WTZ of the injection molding machine is larger than the threshold value of the temperature detection coefficient of the injection molding machine, marking the stable working temperature WTZ of the injection molding machine as the limit temperature value of the injection molding machine, and when the real-time working temperature of the injection molding machine barrel reaches the limit temperature value, the injection molding machine barrel does not perform any operation, and sending a stop operation signal of the injection molding machine to the controller;
v3: after receiving the non-operation instruction of the injection molding machine barrel, the controller transmits the non-operation instruction to the injection molding machine control unit, and the injection molding machine control unit heats the solution in the injection molding machine by the heating unit for controlling the center reference point and the edge reference point of the temperature detection surface, so that the temperature in the injection molding machine is heated to be not lower than the detection coefficient threshold value of the injection molding machine.
When the temperature regulating unit receives an abnormal signal of the injection molding machine, the temperature detection coefficient of the injection molding machine is regulated, and when the unstable working temperature of the injection molding machine is regulated to be not lower than the threshold value of the temperature detection coefficient of the injection molding machine, the temperature information of the injection molding mold is secondarily detected by the temperature detecting unit, and the steps are sequentially repeated to complete the regulation of the abnormal temperature of the injection molding machine or the injection molding mold.
The central reference point and the edge reference point of the temperature detection surface are provided with heating units, and the current temperature value of each reference point and a solution image in the injection mold are obtained through a thermal infrared imager;
the center reference points and the edge reference points which are distributed and arranged can realize local heating of the solution in the injection mold, so that the solution in the whole injection mold is heated more uniformly, and the injection molding quality of the television screen sealing panel is improved.
Particularly, the heating units of each reference point of the temperature detection surface are independently controlled, and the selection of each center reference point and each edge reference point is performed according to the shape of the surface of the television screen sealing panel, so that the edge reference point of the convex area of the television screen sealing panel is more dispersed, and the edge reference point of the concave area of the television screen sealing panel is more concentrated.
One of the key points of the application is as follows: the method comprises the steps that an adaptive temperature detection surface is arranged in an injection mold in advance according to the size of a television screen sealing plate, a center reference point is arranged on the temperature detection surface, an annular or rectangular side reference surface is arranged around the center reference point, independent heating units are arranged on the side reference point of the side reference surface and the center reference point, heating of local solution in the injection mold is achieved through the heating units, and overall injection quality of the injection mold is improved;
the second key point of the application is that: the temperature information of the injection mold is obtained through the temperature detection unit, the temperature detection base Wi of the injection mold in the injection molding process is obtained through processing, the temperature detection base Wi is compared with the detection coefficient threshold value, the normal or abnormal signal of the injection mold pouring temperature is obtained, the abnormal signal of the injection mold pouring temperature is transmitted to the injection detection unit, the injection molding machine barrel temperature, the raw material temperature and the raw material viscosity in the injection molding machine barrel are processed through the injection detection unit, the temperature of the injection molding machine is judged, when the temperature of the injection molding machine is normal, the injection molding mold is regulated and controlled through temperature detection, when the temperature of the injection molding machine is abnormal, the temperature of the injection molding machine is regulated and controlled, the heat preservation of the injection molding mold is kept in the regulation and control process, the temperature detection base Wi is monitored for the injection molding mold for the second time, and the intelligent control of the injection molding mold for producing the television screen sealing plate is achieved through two-time adjustment.
The foregoing describes one embodiment of the present application in detail, but the description is only a preferred embodiment of the present application and should not be construed as limiting the scope of the application. All equivalent changes and modifications within the scope of the present application are intended to be covered by the present application.
Claims (1)
1. The intelligent temperature control system of injection mold for the production of TV screen sealing panel is characterized by comprising:
the temperature detection unit is used for detecting temperature information of the injection mold, processing the temperature information to obtain a temperature detection base number, comparing the temperature detection base number with a detection coefficient threshold value, and sending a pouring temperature abnormal signal of the injection mold obtained after the processing to the controller, wherein the temperature abnormal signal is obtained by the processing
The temperature information comprises conventional temperature data before injection molding of the injection mold, temperature change data in the injection molding process and injection molding temperature data in the injection molding process;
the injection molding detection unit is used for receiving the injection molding temperature abnormal signal sent by the controller, detecting the temperature of the injection molding machine during working, and sending the obtained injection molding machine detection signal to the temperature regulation and control unit;
the temperature regulating and controlling unit is used for regulating and controlling abnormal temperature of the injection molding machine or the injection mold;
the injection mold is internally provided with a plurality of temperature detection surfaces, wherein
The temperature detection surface comprises a central reference point arranged on the inner side surface of the injection mold, a side reference point is established on the inner side surface of the injection mold by taking the central reference point as a central point, the side reference surface is composed of a plurality of side reference points, and heating units are arranged on the central reference point and the side reference point;
the side reference surface is arranged in a rectangular or annular structure;
the processing of the temperature detection base comprises the following steps:
s1: the conventional temperature data is the sum of the internal temperature of the injection mold and the external ambient temperature when the injection mold is cast, and is marked as Ci, i=1, 2.
The temperature change data is the ratio of the temperature of the injection mold in casting to the conventional temperature data, and is marked as Ji;
the injection temperature data is the ratio of the temperature of the raw material to the temperature inside the mold when the injection mold is cast, and is marked as Bi;
s2: by the formulaAcquiring a temperature detection base Wi of an injection mold, wherein a1, a2 and a3 are preset proportionality coefficients, a1+a2+a3 is not equal to 0, beta is an error correction coefficient, and the value is 0.57;
s3: if the temperature detection base Wi of the injection mold is not less than the detection coefficient threshold, judging that the casting temperature of the injection mold is normal, and generating a temperature normal signal;
if the temperature detection coefficient Wi of the injection mold is smaller than the detection coefficient threshold value, judging that the casting temperature of the injection mold is abnormal, and generating a temperature abnormal signal;
the injection molding detection unit receives the temperature abnormality signal transmitted by the temperature detection unit and detects the standard information of the injection molding machine in the injection molding process, wherein the temperature abnormality signal comprises a temperature detection signal and a temperature detection signal, wherein the temperature detection signal comprises a temperature detection signal and a temperature detection signal
The standard information comprises raw material temperature data during injection molding, injection molding machine barrel temperature data during injection molding and injection molding viscosity data during injection molding;
the standard information is processed as follows:
s1: marking the difference between the temperature data of the raw material during injection molding, namely the temperature of the discharge of the cylinder during injection molding, and the temperature of the pouring opening of the raw material entering the injection mold, as Yi;
marking the ratio of the temperature data of the injection molding machine barrel to the mixing temperature of the raw materials as Ti;
marking the quotient of injection molding viscosity data, which is injection molding barrel pressure data and raw material mixing temperature during injection molding, as Ni;
s2: by the formulaObtaining a temperature detection coefficient Zi of the injection molding machine, wherein d1, d2 and d3 are preset proportional coefficients, d1, d2 and d3 are not equal to 0, kj is an error correction coefficient, and the value is 1.3689;
s3: if the temperature detection coefficient Zi of the injection molding machine is more than or equal to the temperature detection coefficient threshold value of the injection molding machine, judging that the injection molding machine works normally, and generating a normal signal of the injection molding machine;
if the temperature detection coefficient Zi of the injection molding machine is smaller than the threshold value of the temperature detection coefficient of the injection molding machine, judging that the operation of the injection molding machine is abnormal, and generating an abnormal signal of the injection molding machine;
s4: transmitting a signal of the injection molding machine to a temperature regulation unit;
when the temperature regulating unit receives abnormal signals of the injection molding machine, the injection molding machine is regulated and controlled as follows:
s1: when the temperature regulating unit receives an abnormal signal of the injection molding machine, the working temperature of the injection molding machine is recorded in real time, and the working temperature is marked as unstable working temperature TZ;
s2: comparing the unstable operating temperature TZ of the injection molding machine with a threshold value of a temperature detection coefficient of the injection molding machine, recording the acting time of the temperature rise of the unstable operating temperature TZ of the injection molding machine to the threshold value of the temperature detection coefficient of the injection molding machine, and marking the heated bearing time as TZi;
s3: the method comprises the steps that the bearing time TZi of the unstable working temperature TZ of the injection molding machine to the threshold value of the temperature detection coefficient of the injection molding machine is sent to a controller, the controller sends the received bearing time TZi to an injection mold control unit, and the injection mold is insulated through temperature detection of the injection mold control unit;
when the temperature regulating unit receives a normal signal of the injection molding machine, the injection mold is regulated and controlled as follows:
v1: when the temperature regulating unit receives a normal signal of the injection molding machine, the working temperature of the injection molding machine is recorded in real time, and the working temperature is marked as stable working temperature WTZ;
v2: when the stable working temperature WTZ of the injection molding machine is larger than the threshold value of the temperature detection coefficient of the injection molding machine, marking the stable working temperature WTZ of the injection molding machine as the limit temperature value of the injection molding machine, and when the real-time working temperature of the injection molding machine barrel reaches the limit temperature value, performing no operation on the injection molding machine barrel;
v3: after receiving the non-operation instruction of the injection molding machine barrel, the controller transmits the non-operation instruction to the injection molding machine control unit, and the injection molding machine control unit heats the solution in the injection molding machine by the heating unit for controlling the center reference point and the edge reference point of the temperature detection surface, so that the temperature in the injection molding machine is heated to be not lower than the detection coefficient threshold value of the injection molding machine.
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