CN111571951A - Temperature control system and temperature control method for injection molding machine mold hot runner - Google Patents
Temperature control system and temperature control method for injection molding machine mold hot runner Download PDFInfo
- Publication number
- CN111571951A CN111571951A CN201910120261.XA CN201910120261A CN111571951A CN 111571951 A CN111571951 A CN 111571951A CN 201910120261 A CN201910120261 A CN 201910120261A CN 111571951 A CN111571951 A CN 111571951A
- Authority
- CN
- China
- Prior art keywords
- temperature
- injection molding
- molding machine
- relay
- temperature controller
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- B29C45/26—Moulds
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
- B29C45/2737—Heating or cooling means therefor
-
- 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
- B29C45/26—Moulds
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
- B29C45/2737—Heating or cooling means therefor
- B29C2045/274—Thermocouples or heat sensors
- B29C2045/2741—Plurality of independent thermocouples or heat sensors
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The invention provides a temperature control system and a temperature control method for a hot runner of an injection molding machine mold, wherein the system comprises: the first temperature controller is used for controlling the temperature of the hot runner according to a first preset temperature so as to keep the temperature of the hot runner at the first preset temperature; the second temperature controller is used for controlling the temperature of the hot runner according to a second preset temperature so as to keep the temperature of the hot runner at the second preset temperature, wherein the second preset temperature is less than the first preset temperature; the control module is respectively connected with the first temperature controller and the second temperature controller and used for controlling the first temperature controller or the second temperature controller to work according to the state of the injection molding machine, therefore, the state of the injection molding machine can be monitored, the temperature of a hot runner can be automatically adjusted according to the state of the injection molding machine, and therefore materials are prevented from being heated, decomposed, burnt to yellow and carbonized in the hot runner of the mold when the injection molding machine is shut down due to reasons.
Description
Technical Field
The invention relates to the technical field of plastic processing, in particular to a temperature control system and a temperature control method for a hot runner of an injection molding machine mold.
Background
When the temperature control box of the related injection molding machine is abnormally stopped, the temperature control box still provides the temperature required by normal production, at the moment, the material is heated in the hot runner and does not flow, and after a certain time is reached (the time corresponding to different materials is different), the material begins to decompose and turn yellow or even carbonize, so that a large amount of carbide is attached to the surface of a product during secondary production, and further the product is scrapped in batches.
In the related art, the carbonization of the material is mostly avoided by manually turning off the power, but the related art has a problem in that the temperature of the hot runner is reduced to normal temperature due to the complete turning off of the power, and the production is started after the production is performed again by heating for 25 minutes.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, the first objective of the present invention is to provide a temperature control system for a mold hot runner of an injection molding machine, so as to avoid material decomposition, yellowing and carbonization when the injection molding machine is shut down due to reasons.
The second purpose of the invention is to provide a temperature control method for the hot runner of the injection molding machine mold.
In order to achieve the above object, an embodiment of a first aspect of the present invention provides a temperature control system for a hot runner of a mold of an injection molding machine, including: the first temperature controller is used for controlling the temperature of the hot runner according to a first preset temperature so as to keep the temperature of the hot runner at the first preset temperature; the second temperature controller is used for controlling the temperature of the hot runner according to a second preset temperature so as to keep the temperature of the hot runner at the second preset temperature, wherein the second preset temperature is less than the first preset temperature; and the control module is respectively connected with the first temperature controller and the second temperature controller and is used for controlling the first temperature controller or the second temperature controller to work according to the state of the injection molding machine.
According to the temperature control system of the hot runner of the injection molding machine mold, provided by the embodiment of the invention, the first temperature controller controls the temperature of the hot runner according to the first preset temperature so as to keep the temperature of the hot runner at the first preset temperature, the second temperature controller controls the temperature of the hot runner according to the second preset temperature so as to keep the temperature of the hot runner at the second preset temperature, and the control module is respectively connected with the first temperature controller and the second temperature controller and controls the first temperature controller or the second temperature controller to work according to the state of the injection molding machine. Therefore, the temperature control system of the injection molding machine mold hot runner can monitor the state of the injection molding machine and automatically adjust the temperature of the hot runner according to the state of the injection molding machine, so that the material is prevented from being heated, decomposed, burnt to yellow and carbonized in the mold hot runner when the injection molding machine is shut down due to reasons, manual operation is not needed, production can be quickly recovered when the injection molding machine is produced again, and the production efficiency is improved.
According to one embodiment of the invention, the control module is used for controlling the first temperature controller to work and controlling the second temperature controller to stop working when the injection molding machine is in a normal production state, and controlling the second temperature controller to work and controlling the first temperature controller to stop working when the injection molding machine is in an abnormal shutdown state.
According to one embodiment of the invention, the control module judges the state of the injection molding machine through an injection molding machine operation signal, wherein when the injection molding machine operation signal is not received and lasts for a first preset time, the control module judges that the injection molding machine is in an abnormal shutdown state.
According to one embodiment of the invention, the control module comprises: one end of a first contact of the first relay is connected with a first power line, the other end of the first contact of the first relay is connected with a first power terminal of the first temperature controller, a second power terminal of the first temperature controller is connected with a second power line, one end of a second contact of the first relay is connected with the first power line, the other end of the second contact of the first relay is connected with a first power terminal of the second temperature controller, and a second power terminal of the second temperature controller is connected with the second power line; the control assembly is connected with the coil of the first relay, the control assembly controls the first contact to be closed and the second contact to be opened through the coil of the first relay when the injection molding machine is in a normal production state, and the control assembly controls the second contact to be closed and the first contact to be opened through the coil of the first relay when the injection molding machine is in an abnormal shutdown state.
According to one embodiment of the invention, the control assembly comprises: a first input end of the power supply circuit is connected with the first power line, and a second input end of the power supply circuit is connected with the second power line; a coil of the second relay is connected with a signal receiving end, wherein the signal receiving end is used for receiving an operation signal of the injection molding machine; the relay comprises a delay relay, wherein one end of a coil of the delay relay is connected with a first output end of a power circuit, the other end of the coil of the delay relay is connected with one end of a contact of a second relay, the other end of the contact of the second relay is connected with a second output end of the power circuit, one end of the coil of the delay relay is also connected with one end of the coil of the first relay, one end of the contact of the delay relay is connected with the other end of the coil of the first relay, and the other end of the contact of the delay relay is connected with a second output end of the power circuit.
According to one embodiment of the invention, the contact of the second relay is opened when the coil of the second relay receives the operating signal of the injection molding machine so as to power off the coil of the time delay relay, and the contact of the second relay is closed when the coil of the second relay does not receive the operating signal of the injection molding machine so as to power on the coil of the time delay relay; the contact of the time delay relay is in the on-time of the coil of the time delay relay reaches and closes when first preset time, the contact of the time delay relay is in the coil outage of time delay relay or the on-time of the coil of time delay relay does not reach and breaks off when first preset time.
According to one embodiment of the invention, when the injection molding machine is in a normal production state, the signal receiving end receives an operation signal of the injection molding machine every second preset time, wherein the second preset time is less than the first preset time.
According to one embodiment of the invention, the control assembly further comprises: and the first switch is connected between the other end of the contact of the second relay and the second output end of the power circuit, and is switched off according to an exit instruction of a user so as to control the second temperature controller to stop working.
According to an embodiment of the present invention, the first temperature controllers are plural, the first power terminals of the plural first temperature controllers are all connected to the other end of the first contact of the first relay, the detection ends of the plural first temperature controllers are respectively connected to the plural temperature detectors, and each first temperature controller controls the temperature of the hot runner according to the temperature detected by the corresponding temperature detector and the first preset temperature.
According to an embodiment of the present invention, the number of the second temperature controller is one, and the second temperature controller is connected to the same temperature detector as any one of the plurality of first temperature controllers.
According to an embodiment of the present invention, the number of the second temperature controllers is multiple, the first power terminals of the multiple second temperature controllers are all connected to the other end of the second contact of the first relay, each second temperature controller is connected to the same temperature detector as the corresponding first temperature controller, and each second temperature controller controls the temperature of the hot runner according to the temperature detected by the corresponding temperature detector and the second preset temperature.
In order to achieve the above object, a second embodiment of the present invention provides a method for controlling temperature of a hot runner of a mold of an injection molding machine, comprising: acquiring the state of the injection molding machine; controlling a first temperature controller or a second temperature controller to work according to the state of the injection molding machine, wherein the first temperature controller controls the temperature of a hot runner according to a first preset temperature so as to keep the temperature of the hot runner at the first preset temperature, and the second temperature controller controls the temperature of the hot runner according to a second preset temperature so as to keep the temperature of the hot runner at the second preset temperature, wherein the second preset temperature is less than the first preset temperature.
According to the temperature control method of the hot runner of the injection molding machine mold, provided by the embodiment of the invention, the state of the injection molding machine is firstly obtained, and then the first temperature controller or the second temperature controller is controlled to work according to the state of the injection molding machine, wherein the first temperature controller controls the temperature of the hot runner according to the first preset temperature so as to keep the temperature of the hot runner at the first preset temperature, the second temperature controller controls the temperature of the hot runner according to the second preset temperature so as to keep the temperature of the hot runner at the second preset temperature, and the second preset temperature is smaller than the first preset temperature. Therefore, the temperature control method of the injection molding machine mold hot runner can monitor the state of the injection molding machine and automatically adjust the temperature of the hot runner according to the state of the injection molding machine, so that the material is prevented from being heated, decomposed, burnt to yellow and carbonized in the mold hot runner when the injection molding machine is shut down due to reasons, manual operation is not needed, production can be quickly recovered when the injection molding machine is produced again, and the production efficiency is improved.
According to an embodiment of the present invention, the controlling the first temperature controller or the second temperature controller to operate according to the state of the injection molding machine includes: when the injection molding machine is in a normal production state, controlling the first temperature controller to work and controlling the second temperature controller to stop working; and when the injection molding machine is in an abnormal shutdown state, controlling the second temperature controller to work and controlling the first temperature controller to stop working.
According to one embodiment of the invention, the state of the injection molding machine is judged through an injection molding machine operation signal, wherein when the injection molding machine operation signal is not received and lasts for a first preset time, the injection molding machine is judged to be in an abnormal shutdown state.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a block schematic diagram of a temperature control system for a hot runner of an injection molding machine mold according to an embodiment of the present invention;
FIG. 2 is a schematic circuit diagram of a temperature control system for a hot runner of an injection molding machine mold according to one embodiment of the present invention;
FIG. 3 is a schematic circuit diagram of a temperature control system for a hot runner of an injection molding machine mold according to another embodiment of the present invention;
FIG. 4 is a schematic flow chart of a method for controlling temperature of a hot runner of a mold of an injection molding machine according to an embodiment of the present invention;
fig. 5 is a schematic flow chart of a method for controlling the temperature of a hot runner of a mold of an injection molding machine according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
The temperature control system and the temperature control method of the hot runner of the injection molding machine mold according to the embodiment of the invention are described below with reference to the accompanying drawings.
Fig. 1 is a block schematic diagram of a temperature control system of an injection molding machine mold hot runner according to an embodiment of the present invention. As shown in fig. 1, the temperature control system of the hot runner of the injection molding machine mold according to the embodiment of the present invention includes: a first temperature controller 10, a second temperature controller 20, and a control module 30.
The first temperature controller 10 is configured to control the hot runner temperature according to a first preset temperature T1, so that the hot runner temperature is maintained at a first preset temperature T1; the second temperature controller 20 is configured to control the hot runner temperature according to a second preset temperature T2 so as to maintain the hot runner temperature at a second preset temperature T2, wherein the second preset temperature T2 is less than the first preset temperature T1; the control module 30 is connected to the first temperature controller 10 and the second temperature controller 20, respectively, and the control module 30 is configured to control the first temperature controller 10 or the second temperature controller 20 to operate according to a state of the injection molding machine.
It should be noted that the first temperature controller 10 may refer to a temperature controller that controls the temperature of the hot runner when the injection molding machine is in a production state, that is, a normal production temperature controller, the first preset temperature T1 is a temperature required when the injection molding machine is in normal production, the second temperature controller 20 may refer to a temperature controller that controls the temperature of the hot runner when the injection molding machine is in a shutdown state, that is, a yellowing prevention temperature controller, and the second preset temperature T2 is a material heat preservation temperature required when the injection molding machine is shutdown.
According to an embodiment of the present invention, the control module 30 is configured to control the first temperature controller 10 to operate and the second temperature controller 20 to stop operating when the injection molding machine is in a normal production state, and to control the second temperature controller 20 to operate and the first temperature controller 10 to stop operating when the injection molding machine is in an abnormal shut-down state.
Specifically, the state of the injection molding machine may be judged through an injection molding machine operation signal, wherein when the injection molding machine operation signal is not received and lasts for a first preset time t1, it is judged that the injection molding machine is in an abnormal shutdown state.
That is, it is possible to determine whether the injection molding machine is in a normal production state or in an abnormal shut-down state by monitoring an operation signal of the injection molding machine. If the operation signal of the injection molding machine is received or the time for not receiving the operation signal of the injection molding machine is less than the first preset time T1, the injection molding machine is judged to be in a normal production state, at this time, the power supply of the first temperature controller 10 is switched on, so that the first temperature controller 10 works, and the first temperature controller 10 controls the temperature of the hot runner to be at the first preset temperature T1. If the time for not receiving the injection molding machine operation signal is greater than or equal to the first preset time T1, the injection molding machine is judged to be in an abnormal shutdown state, at this time, the power supply of the first temperature controller 10 is turned off, the power supply of the second temperature controller 20 is turned on, so that the second temperature controller 20 works, the second temperature controller 20 controls the hot runner temperature to be at the second preset temperature T2, the hot runner temperature is kept at a lower temperature state, the hot runner temperature is heated to the first preset temperature T1 only in about 5 minutes when the injection molding machine operation signal is produced again, and the production is rapidly recovered.
As one example, the injection molding machine operation signal may be an injection molding machine melt signal. For example, when the injection molding machine is in a normal production state, the glue melting signal of the injection molding machine can be received every second preset time, wherein the second preset time is less than the first preset time.
Specifically, according to one embodiment of the present invention, as shown in fig. 2, the control module 30 includes: a first relay KA1 and a control assembly 31, wherein one end of a first contact KA11 of the first relay KA1 is connected to a first power line N, the other end of the first contact KA11 of the first relay KA1 is connected to a first power terminal 11 of the first temperature controller 10, a second power terminal 12 of the first temperature controller 10 is connected to a second power line L, one end of a second contact KA12 of the first relay KA1 is connected to the first power line N, the other end of the second contact KA12 of the first relay KA1 is connected to a first power terminal 21 of the second temperature controller 20, and a second power terminal 22 of the second temperature controller 20 is connected to the second power line L; the control assembly 31 is connected with a coil of the first relay KA1, the control assembly 31 controls the first contact KA11 to be closed and the second contact KA12 to be opened through the coil of the first relay KA1 when the injection molding machine is in a normal production state, and the control assembly 31 also controls the second contact KA12 to be closed and the first contact KA11 to be opened through the coil of the first relay KA1 when the injection molding machine is in an abnormal stop state.
It can be understood that when the injection molding machine is in a normal production state, the control assembly 31 controls the first contact KA11 to be closed and the second contact KA12 to be opened through the coil of the first relay KA1, at this time, the first temperature controller 10 works and the second temperature controller 20 stops working, when the injection molding machine is in an abnormal stop state, the control assembly 31 controls the second contact KA12 to be closed and the first contact KA11 to be opened through the coil of the first relay KA1, at this time, the first temperature controller 10 stops working and the second temperature controller 20 works, therefore, the temperature of the hot runner can be automatically adjusted when the injection molding machine is stopped, the material is prevented from being heated and decomposed in the hot runner mold, and is prevented from being burnt and carbonized, and meanwhile, the temperature of the hot runner can be heated to the temperature required when the injection molding machine is normally produced more rapidly when the injection molding machine is.
More specifically, according to an embodiment of the present invention, as shown in fig. 2, the control assembly 31 includes: the relay comprises a power supply circuit 310, a second relay KA2 and a time delay relay KT, wherein a first input end of the power supply circuit 310 is connected with a first power line N, and a second input end of the power supply circuit 310 is connected with a second power line L; a coil of the second relay KA2 is connected with a signal receiving end XS, wherein the signal receiving end XS is used for receiving an operation signal of the injection molding machine; one end of the coil of the time delay relay KT is connected with the first output end of the power supply circuit 310, the other end of the coil of the time delay relay KT is connected with one end of the contact KA21 of the second relay KA2, the other end of the contact KA21 of the second relay KA2 is connected with the second output end of the power supply circuit 310, one end of the coil of the time delay relay KT is also connected with one end of the coil of the first relay KA1, one end of the contact KT1 of the time delay relay KT is connected with the other end of the coil of the first relay KA1, and the other end of the contact KT1 of the time delay relay KT is connected with the second output end of the power supply circuit 310.
Therefore, whether the injection molding machine is in a normal production state or an abnormal shutdown state can be judged according to whether the signal receiving end XS receives the operation signal of the injection molding machine, and specifically, when the signal receiving end XS does not receive the operation signal of the injection molding machine and lasts for a first preset time t1, the injection molding machine is judged to be in the abnormal shutdown state; and when the time that the signal receiving end XS receives the operation signal of the injection molding machine or does not receive the operation signal of the injection molding machine is less than the first preset time t1, judging that the injection molding machine is in a normal production state.
According to an embodiment of the invention, the contact KA21 of the second relay KA2 is opened when the coil of the second relay KA2 receives the operation signal of the injection molding machine to power off the coil of the time delay relay KT, and the contact KA21 of the second relay KA2 is closed when the coil of the second relay KA2 does not receive the operation signal of the injection molding machine to power on the coil of the time delay relay KT; the contact KT1 of the delay relay KT is closed when the energization time of the coil of the delay relay KT reaches a first preset time t1, and the contact KT1 of the delay relay KT is opened when the coil of the delay relay KT is powered off or the energization time of the coil of the delay relay KT does not reach the first preset time t 1.
It can be understood that when the coil of the second relay KA2 receives the operation signal of the injection molding machine, the injection molding machine is in a normal production state, the coil of the second relay KA2 is energized, the contact KA21 of the second relay KA2 is opened, the coil of the delay relay KT is de-energized, the timing reset is zero, the contact KT1 of the delay relay KT is opened, further, the coil of the first relay KA1 is de-energized, the first contact KA11 of the first relay KA1 is closed, and the second contact KA12 is opened, so that the first temperature controller 10 works and the second temperature controller 20 stops working.
When the coil of the second relay KA2 does not receive the operation signal of the injection molding machine and lasts for the first preset time t1, when the injection molding machine is in an abnormal shutdown state, the coil of the second relay KA2 is powered off, the contact KA21 of the second relay KA2 is closed, the coil of the time delay relay KT is powered on, the timing is started, when the timing time is less than a first preset time t1, the contact KT1 of the time delay relay KT is kept open, the coil of the first relay KA1 is powered off, the first contact KA11 of the first relay KA1 is closed, the second contact KA12 is opened, the first temperature controller 10 works, the second temperature controller 20 stops working, when the timing time is more than or equal to a first preset time t1, the contact KT1 of the time delay relay KT is closed, the coil of the first relay KA1 is electrified, the first contact KA11 of the first relay KA1 is opened, the second contact KA12 is closed, so that the first temperature controller 10 stops operating and the second temperature controller 20 operates.
According to an embodiment of the invention, when the injection molding machine is in a normal production state, the signal receiving terminal XS receives an operation signal of the injection molding machine every second preset time t2, wherein the second preset time t2 is less than the first preset time t 1.
It is understood that the second preset time t2 may refer to a time interval between two adjacent times of receiving the operation signal of the injection molding machine by the coil of the second relay KA 2. For example, when the coil of the second relay KA2 receives the operation signal of the injection molding machine for the first time, the injection molding machine is in a normal production state, the coil of the second relay KA2 is energized, the contact KA21 of the second relay KA2 is opened, the coil of the delay relay KT is de-energized, the timing reset is zero, the contact KT1 of the delay relay KT is opened, the coil of the first relay KA1 is de-energized, the first contact KA11 of the first relay KA1 is closed and the second contact KA12 is opened, so that the first temperature controller 10 operates and the second temperature controller 20 stops operating, before the coil of the second relay KA2 receives the operation signal of the injection molding machine for the second time, that is, within a second preset time t2 after the coil of the second relay KA2 receives the operation signal of the injection molding machine for the first time, the coil of the second relay KA2 is de-energized, the contact KT 21 of the second relay KA2 is closed, the coil of the delay relay is, however, since the second preset time t2 is less than the first preset time t1, before the coil of the second relay KA2 receives the operation signal of the injection molding machine for the second time, the contact KT1 of the delay relay KT is kept open, the coil of the first relay KA1 is powered off, the first contact KA11 of the first relay KA1 is closed and the second contact KA12 is open, so that the first temperature controller 10 continues to operate and the second temperature controller 20 stops operating, when the time reaches the second preset time t2, the coil of the second relay KA2 receives the operation signal of the injection molding machine for the second time, the injection molding machine is in a normal production state, the coil of the second relay KA2 is energized, the contact KA21 of the second relay KA2 is open, the coil KA of the delay relay KT is powered off, the timer is reset to zero, the contact KT1 of the delay relay KT is open, further, the coil of the first relay 1 is powered off, the first contact 11 of the first relay 1 is closed and the second contact 12 is open, so that the first temperature controller 10 is operated and the second temperature controller 20 is stopped, and then the coil of the second relay KA2 receives the operation signal of the injection molding machine for the third time, and so on.
That is to say, when the injection molding machine is in a normal production state, the coil of the second relay KA2 receives an operation signal of the injection molding machine every second preset time T2, the coil of the second relay KA2 is powered on intermittently and repeatedly, and further the timing time of the time relay KT is set to zero repeatedly, so that the first temperature controller 10 is powered on all the time, the second temperature controller 20 is powered off all the time, and the temperature in the hot runner is kept at the first preset temperature T1, namely the temperature in normal production all the time.
Further, according to an embodiment of the present invention, as shown in fig. 2, the control component 31 further includes: and a first switch K1, the first switch K1 is connected between the other end of the contact of the second relay KA2 and the second output terminal of the power circuit 310, the first switch K1 is opened according to the exit instruction of the user to control the second temperature controller 20 to stop working.
It can be understood that when the coil of the second relay KA2 does not receive the operation signal of the injection molding machine, the coil of the second relay KA2 is powered off, the contact KA21 of the second relay KA2 is closed, the coil of the delay relay KT is powered on, the timing starts, when the timing time is greater than or equal to the first preset time T1, the injection molding machine is in an abnormal shutdown state, at this time, the contact KT1 of the delay relay KT is closed, the coil of the first relay KA1 is powered on, the first contact KA11 of the first relay KA1 is opened, the second contact KA12 is closed, so that the first temperature controller 10 stops working and the second temperature controller 20 works, the temperature in the hot runner is kept at the second preset temperature T2, and the material is prevented from being heated and decomposed and charred.
Thereafter, the user may manually control the first switch K1 to be turned off, so that the second temperature controller 20 stops operating and the first temperature controller 10 operates.
Specifically, when the user manually controls the first switch K1 to be turned off, the coil of the delay relay KT is turned off, the contact KT1 of the delay relay KT is turned off, and then the coil of the first relay KA1 is turned off, the first contact KA11 of the first relay KA1 is closed, and the second contact KA12 is turned off, so that the first temperature controller 10 works and the second temperature controller 20 stops working.
In addition, the second temperature controller 20 may be stopped and the first temperature controller 10 may be operated by restarting the power supply or energizing the coil of the second relay KA 2.
Specifically, when the power source is restarted, that is, when the power source is powered on again after the power failure of the alternating current 220V power source, the signal receiving end XS receives an operation signal of the injection molding machine, the coil of the second relay KA2 is powered on, the contact KA21 of the second relay KA2 is disconnected, the coil of the delay relay KT is powered off, the contact KT1 of the delay relay KT is disconnected, the coil of the first relay KA1 is powered off, the first contact KA11 of the first relay KA1 is closed, the second contact KA12 is disconnected, and therefore the first temperature controller 10 works and the second temperature controller 20 stops working.
When the coil of the second relay KA2 is powered on, the contact KA21 of the second relay KA2 is disconnected, the coil of the delay relay KT is powered off, the contact KT1 of the delay relay KT is disconnected, the coil of the first relay KA1 is powered off, the first contact KA11 of the first relay KA1 is closed, and the second contact KA12 is disconnected, so that the first temperature controller 10 works and the second temperature controller 20 stops working.
According to an embodiment of the present invention, the first temperature controllers 10 are plural, the first power terminals 11 of the plural first temperature controllers 10 are all connected to the other ends of the first contacts KA11 of the first relays KA1, the detection ends 13 of the plural first temperature controllers 10 are respectively connected to the plural temperature detectors 40, and each first temperature controller 10 controls the hot runner temperature according to the temperature detected by the corresponding temperature detector 40 and the first preset temperature T1.
Further, according to an embodiment of the present invention, as shown in fig. 2, there is one second temperature controller 20, and the same temperature detector 40 is connected to the second temperature controller 20 and any one of the plurality of first temperature controllers 10.
It can be understood that, as an example, as shown in fig. 2, the first temperature controller 10 is two, the second temperature controller 20 is one, when the coil of the second relay KA2 receives the operation signal of the injection molding machine, the injection molding machine is in a normal production state, the coil of the second relay KA2 is electrified, the contact KA21 of the second relay KA2 is disconnected, the coil of the time delay relay KT is powered off, the timing reset is zero, the contact KT1 of the time delay relay KT is disconnected, further, the coil of the first relay KA1 is deenergized, the first contact KA11 of the first relay KA1 is closed and the second contact KA12 is opened, so that the two first temperature controllers 10 are simultaneously operated and the second temperature controller 20 is stopped, the two first temperature controllers 10 then control the temperature of the hot runner according to the temperature detected by the temperature detector 40 corresponding thereto and the first preset temperature T1 so that the temperature of the hot runner is maintained at the first preset temperature T1.
When a coil of the second relay KA2 does not receive an operation signal of the injection molding machine, a coil of the second relay KA2 is powered off, a contact KA21 of the second relay KA2 is closed, a coil of the time delay relay KT is powered on, timing starts, when the timing time is less than a first preset time t1, a contact KT1 of the time delay relay KT is kept open, a coil of the first relay 1 is powered off, a first contact KA11 of the first relay KA1 is closed and a second contact KA12 is opened, two first temperature controllers 10 are operated, the second temperature controller 20 stops operating, when the timing time is greater than or equal to the first preset time t1, the injection molding machine is in an abnormal stop state, the contact KT1 of the time delay relay KT is closed, the coil of the first relay KA1 is powered on, the first contact KA11 of the first relay KA1 is opened and the second contact KA12 is closed, so that the two first temperature controllers 10 stop operating and the second temperature controller 20 operates, and the temperature of the hot runner is controlled according to the temperature detected by the temperature detector 40 which is commonly connected with one first temperature controller 10 and the second preset temperature T2, so that the temperature of the hot runner is kept at the second preset temperature T2, the materials in the hot runner of the mold can be prevented from being heated and decomposed, burned to yellow and carbonized, and the temperature of the hot runner can be more effectively heated to the set temperature in secondary production.
According to an embodiment of the present invention, as shown in fig. 3, the plurality of second temperature controllers 20 are provided, the first power terminals 21 of the plurality of second temperature controllers 20 are each connected to the other end of the second contact KA12 of the first relay KA1, each second temperature controller 20 is connected to the same temperature detector 40 as the corresponding first temperature controller 10, and each second temperature controller 20 controls the hot runner temperature according to the temperature detected by the corresponding temperature detector 40 and the second preset temperature T2.
It is understood that, as one example, as shown in fig. 3, the first temperature controller 10 and the second temperature controller 20 are both two. When the coil of the second relay KA2 receives an operation signal of the injection molding machine, the injection molding machine is in a normal production state, the coil of the second relay KA2 is powered on, the contact KA21 of the second relay KA2 is disconnected, the coil of the delay relay KT is powered off, the timing reset is zero, the contact KT1 of the delay relay KT is disconnected, further, the coil of the first relay KA1 is powered off, the first contact KA11 of the first relay KA1 is closed, the second contact KA12 is disconnected, therefore, the two first temperature controllers 10 work simultaneously, the two second temperature controllers 20 stop working, then the two first temperature controllers 10 control the temperature of the hot runner according to the temperature detected by the temperature detector 40 corresponding to the two first temperature controllers and the first preset temperature T1, and the temperature of the hot runner is kept at the first preset temperature T1.
When a coil of the second relay KA2 does not receive an operation signal of the injection molding machine, the coil of the second relay KA2 is powered off, a contact KA21 of the second relay KA2 is closed, a coil of the time delay relay KT is powered on, timing starts, when the timing time is less than a first preset time t1, a contact KT1 of the time delay relay KT is kept open, a coil of a first relay 1 is powered off, a first contact KA11 of the first relay KA1 is closed and a second contact KA12 is opened, the two first temperature controllers 10 work and the two second temperature controllers 20 stop working, when the timing time is greater than or equal to the first preset time t1, the injection molding machine is in an abnormal stop state, the contact KT1 of the time delay relay KT is closed, the coil of the first relay KA1 is powered on, the first contact KA11 of the first relay KA1 is opened and the second contact KA12 is closed, so that the two first temperature controllers 10 stop working and the two second temperature controllers 20 both work, then, the two second temperature controllers 20 respectively control the temperature of the hot runner according to the temperature detected by the corresponding temperature detector 40 and the second preset temperature T2, specifically, control the temperature in the hot runner at the second preset temperature T2, so that the temperature of the hot runner is kept at a lower temperature state, thereby avoiding the material from being heated and decomposed, burned to yellow and carbonized in the hot runner of the mold, and facilitating the temperature of the hot runner to be heated to the temperature required by the injection molding machine during normal production more quickly during secondary production.
Therefore, the accuracy of preventing yellowing can be improved by arranging the plurality of first temperature controllers and the plurality of second temperature controllers and correspondingly connecting the plurality of temperature detectors with the plurality of first temperature controllers and the plurality of second temperature controllers respectively.
In summary, according to the temperature control system of the hot runner of the injection molding machine mold provided by the embodiment of the invention, the first temperature controller controls the temperature of the hot runner according to the first preset temperature so as to keep the temperature of the hot runner at the first preset temperature, the second temperature controller controls the temperature of the hot runner according to the second preset temperature so as to keep the temperature of the hot runner at the second preset temperature, and the control module is respectively connected to the first temperature controller and the second temperature controller and controls the first temperature controller or the second temperature controller to operate according to the state of the injection molding machine. Therefore, the temperature control system of the injection molding machine mold hot runner can monitor the state of the injection molding machine and automatically adjust the temperature of the hot runner according to the state of the injection molding machine, so that the material is prevented from being heated, decomposed, burnt to yellow and carbonized in the mold hot runner when the injection molding machine is shut down due to reasons, manual operation is not needed, production can be quickly recovered when the injection molding machine is produced again, and the production efficiency is improved.
Based on the temperature control system of the injection molding machine mold hot runner of the embodiment, the embodiment of the invention also provides a temperature control method of the injection molding machine mold hot runner.
Fig. 4 is a schematic flow chart of a temperature control method of an injection molding machine mold hot runner according to an embodiment of the present invention, and as shown in fig. 4, the temperature control method of the injection molding machine mold hot runner according to the embodiment of the present invention includes the following steps:
s1, acquiring the state of the injection molding machine;
and S2, controlling the first temperature controller or the second temperature controller to work according to the state of the injection molding machine, wherein the first temperature controller controls the temperature of the hot runner according to a first preset temperature so as to keep the temperature of the hot runner at the first preset temperature, and the second temperature controller controls the temperature of the hot runner according to a second preset temperature so as to keep the temperature of the hot runner at the second preset temperature, wherein the second preset temperature is less than the first preset temperature.
Specifically, the state of the injection molding machine can be judged through the injection molding machine operation signal, wherein when the injection molding machine operation signal is not received and lasts for a first preset time, the injection molding machine is judged to be in an abnormal shutdown state. In an embodiment of the present invention, as shown in fig. 5, the controlling the first temperature controller or the second temperature controller to operate according to the state of the injection molding machine further includes the steps of:
and S21, controlling the first temperature controller to work and controlling the second temperature controller to stop working when the injection molding machine is in a normal production state.
And S22, controlling the second temperature controller to work and controlling the first temperature controller to stop working when the injection molding machine is in an abnormal stop state.
It should be noted that the foregoing explanation of the embodiment of the temperature control system for the hot runner of the injection molding machine mold is also applicable to the temperature control method for the hot runner of the injection molding machine mold of this embodiment, and details are not repeated here.
In summary, according to the temperature control method for the hot runner of the mold of the injection molding machine provided by the embodiment of the invention, the state of the injection molding machine is firstly obtained, and then the first temperature controller or the second temperature controller is controlled to operate according to the state of the injection molding machine, wherein the first temperature controller controls the temperature of the hot runner according to the first preset temperature so as to keep the temperature of the hot runner at the first preset temperature, and the second temperature controller controls the temperature of the hot runner according to the second preset temperature so as to keep the temperature of the hot runner at the second preset temperature, wherein the second preset temperature is smaller than the first preset temperature. Therefore, the temperature control method of the injection molding machine mold hot runner can monitor the state of the injection molding machine and automatically adjust the temperature of the hot runner according to the state of the injection molding machine, so that the material is prevented from being heated, decomposed, burnt to yellow and carbonized in the mold hot runner when the injection molding machine is shut down due to reasons, manual operation is not needed, production can be quickly recovered when the injection molding machine is produced again, and the production efficiency is improved.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing steps of a custom logic function or process, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.
The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc. Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (14)
1. The utility model provides a temperature control system of injection molding machine mould hot runner which characterized in that includes:
the first temperature controller is used for controlling the temperature of the hot runner according to a first preset temperature so as to keep the temperature of the hot runner at the first preset temperature;
the second temperature controller is used for controlling the temperature of the hot runner according to a second preset temperature so as to keep the temperature of the hot runner at the second preset temperature, wherein the second preset temperature is less than the first preset temperature;
and the control module is respectively connected with the first temperature controller and the second temperature controller and is used for controlling the first temperature controller or the second temperature controller to work according to the state of the injection molding machine.
2. The system of claim 1, wherein said control module is configured to control said first temperature controller to operate and said second temperature controller to stop operating when said injection molding machine is in a normal production state, and to control said second temperature controller to operate and said first temperature controller to stop operating when said injection molding machine is in an abnormal shut-down state.
3. The system of claim 2, wherein the control module determines the status of the injection molding machine from the injection molding machine operation signal, wherein the injection molding machine is determined to be in an abnormal shut down state when the injection molding machine operation signal is not received for a first predetermined time.
4. The system of claim 3, wherein said control module comprises:
one end of a first contact of the first relay is connected with a first power line, the other end of the first contact of the first relay is connected with a first power terminal of the first temperature controller, a second power terminal of the first temperature controller is connected with a second power line, one end of a second contact of the first relay is connected with the first power line, the other end of the second contact of the first relay is connected with a first power terminal of the second temperature controller, and a second power terminal of the second temperature controller is connected with the second power line;
the control assembly is connected with the coil of the first relay, the control assembly controls the first contact to be closed and the second contact to be opened through the coil of the first relay when the injection molding machine is in a normal production state, and the control assembly controls the second contact to be closed and the first contact to be opened through the coil of the first relay when the injection molding machine is in an abnormal shutdown state.
5. The system of claim 4, wherein said control assembly comprises:
a first input end of the power supply circuit is connected with the first power line, and a second input end of the power supply circuit is connected with the second power line;
a coil of the second relay is connected with a signal receiving end, wherein the signal receiving end is used for receiving an operation signal of the injection molding machine;
the relay comprises a delay relay, wherein one end of a coil of the delay relay is connected with a first output end of a power circuit, the other end of the coil of the delay relay is connected with one end of a contact of a second relay, the other end of the contact of the second relay is connected with a second output end of the power circuit, one end of the coil of the delay relay is also connected with one end of the coil of the first relay, one end of the contact of the delay relay is connected with the other end of the coil of the first relay, and the other end of the contact of the delay relay is connected with a second output end of the power circuit.
6. The system of claim 5, wherein,
the contact of the second relay is opened when the coil of the second relay receives the operating signal of the injection molding machine so as to cut off the power of the coil of the delay relay, and the contact of the second relay is closed when the coil of the second relay does not receive the operating signal of the injection molding machine so as to electrify the coil of the delay relay;
the contact of the time delay relay is in the on-time of the coil of the time delay relay reaches and closes when first preset time, the contact of the time delay relay is in the coil outage of time delay relay or the on-time of the coil of time delay relay does not reach and breaks off when first preset time.
7. The system of claim 5 or 6, wherein said signal receiving terminal receives an operating signal from said injection molding machine every second predetermined time when said injection molding machine is in a normal production state, wherein said second predetermined time is less than said first predetermined time.
8. The system of claim 5, wherein said control assembly further comprises:
and the first switch is connected between the other end of the contact of the second relay and the second output end of the power circuit, and is switched off according to an exit instruction of a user so as to control the second temperature controller to stop working.
9. The system of claim 4, wherein the plurality of first temperature controllers are connected to the other end of the first contact of the first relay, the plurality of first temperature controllers have their respective first power terminals connected to the other end of the first contact of the first relay, the plurality of first temperature controllers have their respective sensing ends connected to the plurality of temperature detectors, and each of the plurality of first temperature controllers controls the temperature of the hot runner according to the temperature sensed by the corresponding temperature detector and the first predetermined temperature.
10. The system of claim 9, wherein said second temperature controller is a single temperature controller, and wherein said second temperature controller is connected to the same temperature detector as any of said plurality of first temperature controllers.
11. The system of claim 9, wherein the plurality of second temperature controllers are connected to the other end of the second contact of the first relay, each of the second temperature controllers is connected to the same temperature detector as the corresponding first temperature controller, and each of the second temperature controllers controls the temperature of the hot runner according to the temperature detected by the corresponding temperature detector and the second preset temperature.
12. A temperature control method for a hot runner of a mold of an injection molding machine is characterized by comprising the following steps:
acquiring the state of the injection molding machine;
controlling a first temperature controller or a second temperature controller to work according to the state of the injection molding machine, wherein the first temperature controller controls the temperature of a hot runner according to a first preset temperature so as to keep the temperature of the hot runner at the first preset temperature, and the second temperature controller controls the temperature of the hot runner according to a second preset temperature so as to keep the temperature of the hot runner at the second preset temperature, wherein the second preset temperature is less than the first preset temperature.
13. The method of claim 12, wherein said controlling the operation of the first or second temperature controller based on the state of the injection molding machine comprises:
when the injection molding machine is in a normal production state, controlling the first temperature controller to work and controlling the second temperature controller to stop working;
and when the injection molding machine is in an abnormal shutdown state, controlling the second temperature controller to work and controlling the first temperature controller to stop working.
14. The method of claim 13, wherein the status of the injection molding machine is determined by an injection molding machine operation signal, wherein the injection molding machine is determined to be in an abnormal shut down state when the injection molding machine operation signal is not received for a first predetermined time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910120261.XA CN111571951A (en) | 2019-02-18 | 2019-02-18 | Temperature control system and temperature control method for injection molding machine mold hot runner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910120261.XA CN111571951A (en) | 2019-02-18 | 2019-02-18 | Temperature control system and temperature control method for injection molding machine mold hot runner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111571951A true CN111571951A (en) | 2020-08-25 |
Family
ID=72120460
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910120261.XA Pending CN111571951A (en) | 2019-02-18 | 2019-02-18 | Temperature control system and temperature control method for injection molding machine mold hot runner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111571951A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022132940A1 (en) * | 2020-12-18 | 2022-06-23 | Incoe Corporation | Hot runner process controller |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204036786U (en) * | 2014-07-15 | 2014-12-24 | 格力电器（武汉）有限公司 | Device for controlling injection time of hot runner multi-glue-inlet mold |
| CN105415630A (en) * | 2015-11-25 | 2016-03-23 | 广东长盈精密技术有限公司 | Heating control device, heating device and injection molding machine |
| CN106881829A (en) * | 2017-03-15 | 2017-06-23 | 佛山市顺德区百年科技有限公司 | Hot runner structure, injection mold, processing method and injection moulding process |
-
2019
- 2019-02-18 CN CN201910120261.XA patent/CN111571951A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204036786U (en) * | 2014-07-15 | 2014-12-24 | 格力电器（武汉）有限公司 | Device for controlling injection time of hot runner multi-glue-inlet mold |
| CN105415630A (en) * | 2015-11-25 | 2016-03-23 | 广东长盈精密技术有限公司 | Heating control device, heating device and injection molding machine |
| CN106881829A (en) * | 2017-03-15 | 2017-06-23 | 佛山市顺德区百年科技有限公司 | Hot runner structure, injection mold, processing method and injection moulding process |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022132940A1 (en) * | 2020-12-18 | 2022-06-23 | Incoe Corporation | Hot runner process controller |
| US11697236B2 (en) | 2020-12-18 | 2023-07-11 | Incoe Corporation | Hot runner process controller |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2593533B2 (en) | Fully automatic operation system of injection molding machine | |
| KR101834983B1 (en) | Control system for tooling | |
| CN104066211A (en) | Electric heater with dry-burning identification function and dry-burning identification method thereof | |
| DE102011122337B4 (en) | Injection molding machine | |
| CN103575059A (en) | Detecting system and detecting method for faults of refrigerator defrosting system | |
| KR20010037392A (en) | Cooker components error detecting method | |
| CN111571951A (en) | Temperature control system and temperature control method for injection molding machine mold hot runner | |
| US9014865B2 (en) | Method for monitoring an installation | |
| JP2017050275A (en) | Heating apparatus | |
| EP2366656B1 (en) | Method and device for controlling a filling assembly | |
| CN112804772B (en) | Control method, system and device of electric heater and storage medium | |
| CN112140411B (en) | Electric heating system of blade mould and fault judgment method thereof | |
| JP5755628B2 (en) | Heater disconnection / deterioration judgment method and injection molding machine | |
| CN108780299B (en) | Output control unit, output control system, and control method for output control unit | |
| CN116792945A (en) | Heating system fault prediction method and device and electric water heater | |
| JP2014046497A (en) | Method for estimating deterioration of heater of injection molding machine, and injection molding machine | |
| JP3728235B2 (en) | Tableware disinfection storage, control method thereof and control device | |
| CN109059300B (en) | Heat pump water heater and controller and detection method thereof | |
| JP3838997B2 (en) | Temperature control device for injection molding machine | |
| JPH1079351A (en) | Processing furnace temperature control device | |
| US3450343A (en) | Temperature responsive controller system | |
| WO2020044680A1 (en) | Temperature control system, temperature control method, and program | |
| JP6888202B2 (en) | Temperature control device | |
| JP2001239567A (en) | Method for controlling motor driven injection molding machine | |
| JPH11129309A (en) | Method and apparatus for preventing excess temperature rise of injection molding machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200825 |