JP2015044315A - Controller for injection molding machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a controller for an injection molding machine in which reduction in productivity caused by abnormal conditions is suppressed to the minimum without enlarging the injection molding machine and service life of the machine can be secured.SOLUTION: In the controller for an injection molding machine, in accordance with the kinds of the abnormality detected by an abnormality detection means, conditions so as to be operable are set, the restart of the operation of the injection molding machine is prohibited till the conditions are satisfied. In this way, the service life of the machine can be secured while suppressing the reduction of productivity by abnormal conditions to the minimum.

Description

  The present invention relates to a control device for an injection molding machine, and more particularly to a control device for an injection molding machine having an abnormality detecting means for detecting an abnormal state of the injection molding machine.

In an injection molding machine, a stationary platen and a rear platen disposed behind a movable platen are coupled by a plurality of tie bars, and the movable platen and the rear platen move along the tie bars. In addition, molds are mounted on the mold mounting surfaces of the fixed platen and the movable platen that face each other, and perform mold clamping and mold opening operations.
Also, the injection unit is moved back and forth with respect to the fixed platen, the injection nozzle at the tip of the cylinder of the injection unit is brought into close contact with the resin injection port of the fixed mold attached to the fixed platen, and the resin melted by screw rotation is The molten resin is injected into the mold by feeding it forward and moving the screw forward.

FIG. 1 is a diagram showing an overall configuration of an injection molding machine including an injection unit, and a resin of a fixed mold 40b in which an injection nozzle 12 at the tip of an injection cylinder section 11 of an injection section is fixed to a fixed platen 33. The state where it is in close contact with the inlet is shown.
The injection molding machine includes a mold clamping unit and an injection unit on a base. The injection part heats and melts the resin material (pellet) and injects the molten resin into the cavity of the mold 40 (40a, 40b). The mold clamping unit mainly opens and closes the mold 40.

In the injection part, an injection nozzle 12 is attached to the tip of the injection cylinder part 11, and a screw 13 is inserted into the injection cylinder part 11. Reference numeral 14 denotes a hopper that supplies resin to the injection cylinder unit 11.
The mold clamping unit includes a rear platen 31, a movable platen 30, and a fixed platen 33 fixed on the base. The rear platen 31 and the fixed platen 33 are connected by a plurality of tie bars 41.

  Further, the injection molding machine is provided with a mechanism for rotating and moving forward and backward, such as a toggle link mechanism for moving the movable platen 30 forward and backward, and a screw 13 inserted through the injection cylinder unit 11. A servo motor 2 is provided. Corresponding to each servo motor 2, a servo amplifier 4 is provided to drive the servo motor 2, and the servo motor 2 and the servo amplifier 4 are connected by a cable 8.

  The control device of the injection molding machine has a function of detecting abnormalities occurring at various points in the injection molding machine, stopping the operation as necessary, and notifying the abnormal state. As an example of the abnormal state, when an abnormality due to the molded product molded in the immediately preceding cycle remaining in the mold is detected, the control device stops the operation and notifies the operator of the abnormality. In that case, in order to prevent a decrease in productivity due to the stop time, the normal operator immediately removes the remaining molded product, cancels the abnormal state, and resumes continuous operation (continuous operation).

  An injection molding machine may be used under high load conditions exceeding the rating when such continuous operation is performed. Under such a high load condition, if the allowable load and time are exceeded, the servo motor 2, servo amplifier 4, cable 8 etc. used in the injection molding machine may be burned out. Detected as an overload error. In this case, the control device of the injection molding machine stops the continuous operation and notifies the operator of the abnormality.

  Further, in Patent Document 1, as an injection motor control method of an injection molding machine, the integral value of the heat generation amount due to the injection motor drive current over one injection molding cycle exceeds the allowable integral value of the heat generation amount when the continuous rated current flows. A technique is disclosed in which it is determined whether or not such an overheat state is established, and a predetermined avoidance operation is performed when the overheat state is established.

Japanese Examined Patent Publication No. 4-46215

  Many abnormalities detected by the control device of the injection molding machine can be resumed by the operator releasing the abnormality detected by the control device. However, in the case of an overload abnormality, if the continuous operation is resumed immediately, there is a possibility that the temperature will exceed the reference value of the temperature again. If such a thing is repeated, the life of the device may be significantly shortened. There is.

  FIG. 7 is a diagram showing the relationship between the operation stop state and the motor internal temperature in this prior art. As shown in FIG. 7, a reference value is set as a value indicating a motor overload abnormality. If the motor internal temperature exceeds a reference value due to an overload abnormality of the motor, the controller determines that it is abnormal by detecting it and the operation is stopped. However, if the abnormality is released and the operation is resumed in a short time, even if the abnormality is released, a predetermined amount of heat is generated by the driving of the motor, and the operation exceeds the reference value and stops the operation. It will be.

  When continuous operation is resumed in such a state where heat radiation is insufficient, an overload abnormality may be detected again, and it may be difficult to find appropriate molding conditions that allow continuous operation. In order to solve this problem, a drive device with a higher rating can be used. In this case, however, the size of the device may increase, which may increase the price.

  Moreover, since the technique disclosed in Patent Document 1 is determined by comparing the integral value of the calorific value calculated from the drive current of the injection motor with an allowable value, depending on other factors other than the drive current, The actual overheat value may be different from the actual value.

  Accordingly, an object of the present invention is to provide a control device for an injection molding machine capable of ensuring a device life while minimizing a decrease in productivity due to an abnormal state without increasing the size of the injection molding machine. To do.

In the invention according to claim 1 of the present application, in the control apparatus for an injection molding machine having an abnormality detection means for detecting an abnormal state of the injection molding machine main body, it is operable in accordance with the type of abnormality detected by the abnormality detection means. There is provided a control apparatus for an injection molding machine, characterized by comprising: condition setting means for setting conditions up to and operation resumption prohibiting means for prohibiting operation resumption until the conditions set by the condition setting means are satisfied. .
In the invention according to claim 1, in the injection molding machine, by providing the conditions until each of them can be operated according to the type of the abnormal state, the life of the apparatus is reduced while minimizing the decrease in productivity due to the abnormal state. It can be secured.

In the invention according to claim 2 of the present application, it has a time measuring means for measuring an elapsed time after the injection molding machine is stopped after detecting an abnormality, and the operation resumption prohibiting means has a time for time counting by the time measuring means. 2. The control apparatus for an injection molding machine according to claim 1, wherein resumption of operation is prohibited until a time set by the condition setting means elapses.
In the invention according to claim 2, by prohibiting the resumption of the operation of the injection molding machine until a set time has elapsed according to the type of abnormal state, the temperature inside the servo motor is increased as the set time elapses. descend. As a result, the continuous operation is resumed after the heat radiation has been carried out sufficiently, so that the temperature that is detected as abnormal is not exceeded even though the abnormality of the injection molding machine has been resolved, and the continuous operation is appropriately performed. It becomes possible to do.

In the invention according to claim 3 of the present application, the injection molding machine includes a servo motor that drives a drive unit of the injection molding machine, a servo amplifier that controls the servo motor, and a power line that connects the servo motor and the servo amplifier. And at least one of the servo motor, the servo amplifier, and the power line as a temperature measurement target, temperature measurement means for measuring the temperature of the temperature measurement target, and a reference value for stopping the operation for each temperature measurement target And a reference value setting means for setting the temperature to be set, and an operation stop means for stopping the operation when the temperature of any part of the temperature measurement object exceeds the reference value set by the reference value setting means. The condition setting means sets an operable temperature lower than the reference value, and the operation resumption prohibiting means determines that the temperature of the temperature measurement target exceeding the reference value is the dynamic temperature. Controllable device for an injection molding machine according to claim 1, wherein the prohibiting operation resume until drops to temperature is provided.
In the invention which concerns on Claim 3, it has a temperature measurement means which measures the temperature of temperature measurement object, and stops operation | movement when the actual temperature which the temperature measurement means measured exceeds a reference value, and after that, it exceeds By prohibiting the resumption of operation until it is detected that the temperature has dropped to a low operable temperature, continuous operation is resumed after heat radiation has been carried out. The temperature that is detected is not exceeded, and the continuous operation can be appropriately performed.

In the invention according to claim 4 of the present application, the injection molding machine includes a servo motor that drives a drive unit of the injection molding machine, a servo amplifier that controls the servo motor, and a power line that connects the servo motor and the servo amplifier. And at least one of the servo motor, the servo amplifier, and the power line as a temperature calculation target, and a temperature calculation unit that calculates a temperature of the temperature calculation target from a calorific value generated by a current flowing through the temperature calculation target; A reference value setting unit that sets a temperature that is a reference value for stopping the operation for each temperature calculation target, and a reference in which the calculated temperature at any point of the temperature calculation target is set by the reference value setting unit Operation stopping means for stopping the operation when a value is exceeded, the condition setting means sets an operable temperature lower than the reference value, and restarts the operation 2. The control device for an injection molding machine according to claim 1, wherein the stopping unit prohibits the restart of the operation until the calculated temperature of the temperature measurement target exceeding the reference value falls to the operable temperature. Is provided.
In the invention according to claim 4, the temperature of the temperature calculation target is calculated from the amount of heat generated by the current flowing through the temperature calculation target, the operation is stopped when the calculated temperature exceeds the reference value, and then the temperature calculation is performed. By prohibiting the restart of the operation until the calculated temperature calculated by the means falls to an operable temperature lower than the predetermined temperature, the continuous operation is resumed after the heat radiation has been carried out sufficiently, eliminating the abnormality of the injection molding machine In spite of this, it will not exceed the temperature at which it is detected as abnormal, and appropriate continuous operation will be possible.

In the invention according to claim 5 of the present application, the injection molding machine includes a servo motor that drives a drive unit of the injection molding machine, a servo amplifier that controls the servo motor, and a power line that connects the servo motor and the servo amplifier. And at least one of the servo motor, the servo amplifier, and the power line as a temperature monitoring target, temperature measuring means for measuring an actual temperature of the temperature monitoring target, and a heat generation amount generated by a current flowing through the temperature monitoring target Any one of the temperature calculation means for calculating the temperature of the temperature monitoring object as a calculated temperature from, a reference value setting means for setting a temperature as a reference value for stopping the operation for each temperature monitoring object, and the temperature monitoring object Operation stop means for stopping the operation when the calculated temperature at the point exceeds the reference value set by the reference value setting means, and the condition setting means The operable temperature lower than the reference value is set, and the operation resumption prohibiting means prohibits the resumption of operation until the actual temperature of the temperature monitoring target exceeding the reference value falls to the operable temperature. A control apparatus for an injection molding machine according to claim 1 is provided.
In the invention according to claim 5, the temperature of the temperature monitoring target is calculated from the amount of heat generated by the current flowing through the temperature monitoring target, the operation is stopped when the calculated temperature exceeds the reference value, and then the temperature measurement is performed. Because continuous operation is resumed after heat release is performed by prohibiting the restart of operation until it is detected that the temperature of the temperature monitoring target measured by the means falls to an operable temperature lower than the predetermined temperature. In spite of eliminating the abnormality of the injection molding machine, the temperature at which the abnormality is detected is not exceeded, and the continuous operation can be appropriately performed.

  According to the present invention, it is possible to provide a control device for an injection molding machine capable of ensuring a device life while minimizing a decrease in productivity due to an abnormal state without increasing the size of the injection molding machine. .

It is a figure which shows the whole structure of an injection molding machine and a control apparatus. It is a flowchart which shows the flow of operation | movement in 1st Embodiment. It is a figure which shows the relationship between the driving | running | working and stop state of the injection molding machine in 1st Embodiment, and motor internal temperature. It is a flowchart which shows the flow of operation | movement in 2nd Embodiment. It is a flowchart which shows the flow of operation | movement in 3rd Embodiment. It is a flowchart which shows the flow of operation | movement in 4th Embodiment. It is a figure which shows the relationship between the driving | running | working and stop state of the injection molding machine in a prior art, and motor internal temperature.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(First embodiment)
FIG. 1 is an overall view showing a configuration of an injection molding machine and a control device in the present embodiment. The same components as those of the prior art are denoted by the same reference numerals and description thereof is omitted. In the present embodiment, the servo motor 2 provided in the drive mechanism, the servo amplifier 4 for driving the servo motor 2, and the temperature of the cable 8 connecting the servo motor 2 and the servo amplifier 4 are measured. The temperature measuring device 6 is provided. Then, the temperature of each part measured by the temperature measuring device 6 is sent to the control device 50. In the control device 50, a temperature calculation means 52 and a timer 54 are provided.

  In this embodiment, when an abnormality is detected in the injection molding machine, depending on the type of abnormality, the operation is continued until the end of one cycle, and the operation is stopped and the operation that is immediately stopped are set in advance. ing. Also, those that stop immediately are those that can be restarted when the operator performs an abnormality canceling operation from the control panel of the control device 50, and those that start counting immediately after the abnormality is detected depending on the type of abnormality. It is divided into those that cannot be restarted until the stored time elapses.

FIG. 2 is a flowchart showing a flow of operations in the present embodiment. Hereinafter, each step will be described.
(Step SA1) The control device determines whether an abnormal state of the injection molding machine has been detected. If detected (YES), the process proceeds to step SA2, and if not detected (NO), the process waits until the abnormal state is detected by repeating step SA1.
(Step SA2) The type of abnormality is specified.
(Step SA3) The operation of the injection molding machine is stopped.
(Step SA4) A timer time corresponding to the specified abnormality type is set.

(Step SA5) The timer starts counting.
(Step SA6) It is determined whether or not an abnormality canceling operation has been performed. If the release operation has been performed (YES), the process proceeds to step SA7. If not (NO), step SA6 is repeated until the release operation is performed.
(Step SA7) It is determined whether the timer has expired after the set time has elapsed. When the timer is up (YES), the process proceeds to step SA8, and when the timer is not up (NO), the process waits until the timer is up by repeating step SA7.
(Step SA8) Resuming operation is permitted.
(Step SA9) It is determined whether or not the entire operation cycle is completed. When the operation cycle ends (YES), the operation ends. When the operation cycle does not end (NO), the process returns to step SA1.

  FIG. 3 is a diagram showing the relationship between the operation and stop state of the injection molding machine according to the present embodiment and the motor internal temperature. Under initial conditions, when the internal temperature of the motor rises and exceeds a reference value after the start of operation, the operation is stopped by detecting an abnormal state. In this embodiment, as seen in step SA4 in the flowchart of FIG. 2, a timer time corresponding to the type of abnormality is set, and during that time, the restart of operation is restricted. The temperature will drop. As shown in FIG. 3, in this embodiment, since the restart of operation is restricted during the set timer period, the temperature inside the servo motor is lowered, and then the continuous operation is resumed. However, the temperature does not reach the reference value, and continuous operation is possible without problems.

(Second Embodiment)
FIG. 4 is a flowchart showing an operation flow in the present embodiment. This embodiment is different from the first embodiment in that the temperature of the servo motor, servo amplifier, and power line is actually measured instead of the time measurement by the timer. Hereinafter, each step will be described.
(Step SB1) It is determined whether the temperature of the servo motor, servo amplifier, and power line has exceeded a reference value. Here, the reference value can be set to a different value for each servo motor, servo amplifier, and power line, or a common temperature can be used. If exceeded (YES), the process proceeds to step SB2, and if not exceeded (NO), the process waits until the abnormal state is detected by repeating step SB1.
(Step SB2) The operation of the injection molding machine is stopped.

(Step SB3) It is determined whether the temperature of the servo motor, servo amplifier, and power line has fallen below a predetermined temperature. If it is lower (YES), the process proceeds to step SB4. If not lower (NO), step SB3 is repeated until the temperature falls below a predetermined temperature.
(Step SB4) The operation restart of the injection molding machine is permitted.
(Step SB5) It is determined whether or not the entire operation cycle has been completed. When the operation cycle ends (YES), the operation ends. When the operation cycle does not end (NO), the process returns to step SB1.

(Third embodiment)
FIG. 5 is a flowchart showing an operation flow in the present embodiment. In this embodiment, instead of actually measuring the temperature of the servo motor, servo amplifier, and power line, the temperature calculated from the amount of heat generated by the current value flowing through the servo motor, servo amplifier, and power line exceeds the reference value. Instead of measuring that the temperature of the servo motor, servo amplifier, and power line actually falls below the specified temperature when restarting operation, the current value flowing through the servo motor, servo amplifier, and power line The point which determines whether the temperature calculated from the emitted-heat amount is less than predetermined temperature differs from 2nd Embodiment. In the calculation, the calculation is performed on the assumption that the surrounding environment in which the injection molding machine is arranged is a normal arrangement environment of the injection molding machine. Since the placement environment of injection molding machines is generally operated by human hands, the temperature is not excessively high. Conversely, when the temperature is low, the actual temperature is higher than the calculated result. There is no problem because the can swing in the direction of safety. Hereinafter, each step will be described.
(Step SC1) It is determined whether or not the temperature calculated from the amount of heat generated by the current value flowing through the servo motor, servo amplifier, and power line exceeds the reference value. Here, the reference value can be set to a different value for each servo motor, servo amplifier, and power line, or a common temperature can be used. If exceeded (YES), the process proceeds to step SC2, and if not exceeded (NO), the process waits until the abnormal state is detected by repeating step SC1.
(Step SC2) The operation of the injection molding machine is stopped.

(Step SC3) It is determined whether the calculated temperature has fallen below a predetermined temperature. If it has fallen below (YES), the process proceeds to step SC4. If it has not fallen below (NO), step SC3 is repeated until the temperature falls below a predetermined temperature.
(Step SC4) Resuming the operation of the injection molding machine is permitted.
(Step SC5) It is determined whether or not the entire operation cycle has been completed. When the operation cycle ends (YES), the operation ends. When the operation cycle does not end (NO), the process returns to step SC1.

(Fourth embodiment)
FIG. 6 is a flowchart showing an operation flow in the present embodiment. The present embodiment is different from the third embodiment in that when the operation is resumed, it is determined by actually measuring that the temperatures of the servo motor, servo amplifier, and power line are below a predetermined temperature. Hereinafter, each step will be described.
(Step SD1) It is determined whether or not the temperature calculated from the amount of heat generated by the current value flowing through the servo motor, servo amplifier, and power line exceeds the reference value. Here, the reference value can be set to a different value for each servo motor, servo amplifier, and power line, or a common temperature can be used. If exceeded (YES), the process proceeds to step SD2, and if not exceeded (NO), the process waits until the abnormal state is detected by repeating step SD1.
(Step SD2) The operation of the injection molding machine is stopped.

(Step SD3) It is determined whether the temperature of the servo motor, servo amplifier, and power line has fallen below a predetermined temperature. If it has fallen below (YES), the process proceeds to step SD4. If it has not fallen below (NO), step SD3 is repeated until the temperature falls below a predetermined temperature.
(Step SD4) Resuming the operation of the injection molding machine is permitted.
(Step SD5) It is determined whether or not the entire operation cycle is completed. When the operation cycle ends (YES), the operation ends. When the operation cycle does not end (NO), the process returns to step SD1.

DESCRIPTION OF SYMBOLS 2 Servo motor 4 Servo amplifier 6 Temperature measuring device 8 Cable 11 Injection cylinder part 12 Injection nozzle 13 Screw 14 Hopper 30 Movable platen 31 Rear platen 33 Fixed platen 40 Mold 40a Movable side die 40b Fixed side die 50 Control device 52 Temperature calculation Means 54 Timer

In the invention according to claim 1 of the present application, in the control apparatus for an injection molding machine having an abnormality detection means for detecting an abnormal state of the injection molding machine main body, when the abnormality detection means detects an abnormal state of the injection molding machine, An operation stopping means for stopping the operation of the injection molding machine, a condition setting means for setting a condition until the operation is enabled in accordance with the type of abnormality detected by the abnormality detecting means, and a setting of the condition setting means and operation restart prohibiting means for prohibiting the operation restart until the condition, have a, and error recovery operation means for releasing the stop of the operation of the injection molding machine, the injection molding machine is stopped by the operation stopping means resumption of the operation satisfies the conditions set by the condition setting means, and an injection molding machine, characterized in that it is possible when the abnormality removing operation is performed in the abnormal release operation means Control device is provided.
In the invention according to claim 1, in the injection molding machine, by providing the conditions until each of them can be operated according to the type of the abnormal state, the life of the apparatus is reduced while minimizing the decrease in productivity due to the abnormal state. It can be secured. In addition, an abnormality canceling operation unit is provided so that the conditions set by the condition setting unit are satisfied, and the operation of the injection molding machine is restarted when the abnormality canceling operation is performed on the abnormality canceling operation unit. As a result, not only the condition set by the condition setting means is satisfied, but also the safety can be improved by restarting the operation by the abnormality canceling operation after confirming more reliably.

In the invention according to claim 3 of the present application, the injection molding machine includes a servo motor that drives a drive unit of the injection molding machine, a servo amplifier that controls the servo motor, and a power line that connects the servo motor and the servo amplifier. And at least one of the servo motor, the servo amplifier, and the power line as a temperature measurement target, temperature measurement means for measuring the temperature of the temperature measurement target, and a reference value for stopping the operation for each temperature measurement target and a reference value setting means for setting the temperature at which the operation stopping means, the operation when the temperature of any point of the temperature measurement object exceeds a reference value set by the reference value setting means is stopped, the condition setting unit sets the reference value lower than the operable temperature, the operation restart prohibiting means, the temperature of the temperature measurement object exceeds the reference value, before Operable control device for an injection molding machine according to claim 1, wherein the prohibiting operation resume until drops to temperature is provided.
In the invention which concerns on Claim 3, it has a temperature measurement means which measures the temperature of temperature measurement object, and stops operation | movement when the actual temperature which the temperature measurement means measured exceeds a reference value, and after that, it exceeds By prohibiting the resumption of operation until it is detected that the temperature has dropped to a low operable temperature, continuous operation is resumed after heat radiation has been carried out. The temperature that is detected is not exceeded, and the continuous operation can be appropriately performed.

In the invention according to claim 4 of the present application, the injection molding machine includes a servo motor that drives a drive unit of the injection molding machine, a servo amplifier that controls the servo motor, and a power line that connects the servo motor and the servo amplifier. And at least one of the servo motor, the servo amplifier, and the power line as a temperature calculation target, and a temperature calculation unit that calculates a temperature of the temperature calculation target from a calorific value generated by a current flowing through the temperature calculation target; for each of said temperature calculation target, and a reference value setting means for setting the temperature to be a reference value for stopping the operation, the operation stopping means, temperature calculated for any of the positions of the temperature calculation target is the stops the operation when it exceeds the reference value set by the reference value setting means, the condition setting unit sets a lower than the reference value operable temperature, the operation 2. The injection molding machine control according to claim 1, wherein the opening prohibiting unit prohibits the restart of the operation until the calculated temperature of the temperature measurement target exceeding the reference value falls to the operable temperature. An apparatus is provided.
In the invention according to claim 4, the temperature of the temperature calculation target is calculated from the amount of heat generated by the current flowing through the temperature calculation target, the operation is stopped when the calculated temperature exceeds the reference value, and then the temperature calculation is performed. By prohibiting the restart of the operation until the calculated temperature calculated by the means falls to an operable temperature lower than the predetermined temperature, the continuous operation is resumed after the heat radiation has been carried out sufficiently, eliminating the abnormality of the injection molding machine In spite of this, it will not exceed the temperature at which it is detected as abnormal, and appropriate continuous operation will be possible.

In the invention according to claim 5 of the present application, the injection molding machine includes a servo motor that drives a drive unit of the injection molding machine, a servo amplifier that controls the servo motor, and a power line that connects the servo motor and the servo amplifier. And at least one of the servo motor, the servo amplifier, and the power line as a temperature monitoring target, temperature measuring means for measuring an actual temperature of the temperature monitoring target, and a heat generation amount generated by a current flowing through the temperature monitoring target and temperature calculation means for calculating the temperature of the temperature monitored as calculated temperature from the each temperature monitored, and a reference value setting means for setting the temperature to be a reference value for stopping the operation, the operation stop means , said stops operation when the calculated temperature of any point of the temperature monitored exceeds a predetermined reference value by the reference value setting means, the condition setting The stage sets an operable temperature lower than the reference value, and the operation restart prohibiting means prohibits the operation restart until the actual temperature of the temperature monitoring target exceeding the reference value falls to the operable temperature. A control apparatus for an injection molding machine according to claim 1 is provided.
In the invention according to claim 5, the temperature of the temperature monitoring target is calculated from the amount of heat generated by the current flowing through the temperature monitoring target, the operation is stopped when the calculated temperature exceeds the reference value, and then the temperature measurement is performed. Because continuous operation is resumed after heat release is performed by prohibiting the restart of operation until it is detected that the temperature of the temperature monitoring target measured by the means falls to an operable temperature lower than the predetermined temperature. In spite of eliminating the abnormality of the injection molding machine, the temperature at which the abnormality is detected is not exceeded, and the continuous operation can be appropriately performed.

Claims (5)

In an injection molding machine control device having an abnormality detection means for detecting an abnormal state of an injection molding machine body,
Condition setting means for setting a condition for enabling operation in accordance with the type of abnormality detected by the abnormality detection means;
A control device for an injection molding machine, comprising: operation resumption prohibiting means for prohibiting operation resumption until a condition set by the condition setting means is satisfied. After detecting an abnormality, it has a time measuring means for measuring the elapsed time after stopping the injection molding machine,
2. The control device for an injection molding machine according to claim 1, wherein the operation resumption prohibiting unit prohibits the operation resumption until a time measured by the time measuring unit elapses a time set by the condition setting unit. The injection molding machine
A servo motor that drives the drive unit of the injection molding machine, a servo amplifier that controls the servo motor, and a power line that connects the servo motor and the servo amplifier;
Temperature measuring means for measuring at least one of the servo motor, the servo amplifier, and the power line as a temperature measurement target, and measuring the temperature of the temperature measurement target;
Reference value setting means for setting a temperature to be a reference value for stopping the operation for each temperature measurement object;
Operation stopping means for stopping the operation when the temperature of any part of the temperature measurement object exceeds the reference value set by the reference value setting means;
The condition setting means sets an operable temperature lower than the reference value,
2. The control apparatus for an injection molding machine according to claim 1, wherein the operation resumption prohibiting unit inhibits the operation resumption until the temperature of the temperature measurement target exceeding the reference value falls to the operable temperature. . The injection molding machine
A servo motor that drives the drive unit of the injection molding machine, a servo amplifier that controls the servo motor, and a power line that connects the servo motor and the servo amplifier;
Temperature calculation means for calculating at least one of the servo motor, the servo amplifier, and the power line as a temperature calculation target, and calculating a temperature of the temperature calculation target from a calorific value generated by a current flowing through the temperature calculation target;
A reference value setting means for setting a temperature as a reference value for stopping the operation for each temperature calculation target;
An operation stop means for stopping the operation when the calculated temperature of any part of the temperature calculation object exceeds the reference value set by the reference value setting means;
The condition setting means sets an operable temperature lower than the reference value,
2. The injection molding machine according to claim 1, wherein the operation restart prohibiting unit prohibits the operation restart until the calculated temperature of the temperature measurement target exceeding the reference value falls to the operable temperature. Control device. The injection molding machine
A servo motor that drives the drive unit of the injection molding machine, a servo amplifier that controls the servo motor, and a power line that connects the servo motor and the servo amplifier;
At least one of the servo motor, the servo amplifier, and the power line is a temperature monitoring target,
Temperature measuring means for measuring the actual temperature of the temperature monitoring object;
Temperature calculating means for calculating the temperature of the temperature monitoring target as a calculated temperature from the amount of heat generated by the current flowing through the temperature monitoring target;
Reference value setting means for setting a temperature to be a reference value for stopping operation for each temperature monitoring target;
Operation stop means for stopping the operation when the calculated temperature of any part of the temperature monitoring object exceeds the reference value set by the reference value setting means,
The condition setting means sets an operable temperature lower than the reference value,
2. The control of an injection molding machine according to claim 1, wherein the operation restart prohibiting unit prohibits the operation restart until the actual temperature of the temperature monitoring target exceeding the reference value falls to the operable temperature. apparatus.

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