KR102674941B1 - Apparatus and Method for Diagnosing Fault of Injection Molding Machine - Google Patents

Abstract

The present invention provides a hydraulic device that supplies working fluid to each of the N actuators (N is an integer greater than 1) of an injection molding machine, and provides a first rotation command to the hydraulic device to supply the working fluid to the first actuator among the actuators. A provision part that provides a value; As the first rotation command value is provided, the operating speed at which the first actuator operates with the working fluid supplied by the hydraulic device is measured to obtain a first measured speed value, and the first measured speed value is obtained. The first target speed value is obtained by extracting the operating speed at which the first actuator must operate, and the operating speed when the first actuator operates abnormally according to the first rotation command value is extracted to obtain the first limit speed value. acquisition department to acquire; a diagnostic unit that compares the first measured speed value and the first target speed value and compares the first measured speed value and the first limit speed value; And when the first measured speed value is different from the first target speed value and is a speed value faster than the first limit speed value, the first rotation command to increase the flow rate of the working fluid to be supplied to the first actuator. It relates to a fault diagnosis device for an injection molding machine and a fault diagnosis method for an injection molding machine including a correction unit that obtains a first correction value for the value.

Description

Fault diagnosis device for injection molding machine and fault diagnosis method for injection molding machine {Apparatus and Method for Diagnosing Fault of Injection Molding Machine}

The present invention relates to an injection molding machine that performs injection molding to manufacture injection products.

Injection molding is the most widely used manufacturing method in manufacturing plastic products. For example, in products such as televisions, mobile phones, PDAs, etc., various parts including covers and cases can be manufactured through injection molding.

In general, manufacturing products through injection molding is accomplished through the following processes. First, the molding material to which pigments, stabilizers, plasticizers, fillers, etc. have been added is put into a hopper and made into a molten state. Next, the molten molding material is injected into the mold and then solidified through cooling. Next, the solidified molding material is extracted from the mold and unnecessary parts are removed. Through these processes, injection products of various types and sizes are manufactured.

As a facility to perform such injection molding, an injection molding machine is used. The injection molding machine operates the injection device and the mold clamping device using an injection device that supplies molding material in a molten state, a mold clamping device that solidifies the molding material in a molten state through cooling, and a working fluid such as oil. Includes hydraulic system.

Here, the working fluid supplied by the hydraulic device may leak while flowing along the pipe. However, the injection molding machine according to the prior art has a problem in that it cannot confirm whether leakage of the working fluid has occurred until a failure occurs in the injection device or the mold clamping device.

The present invention was developed to solve the problems described above, and is intended to provide a failure diagnosis device for an injection molding machine and a failure diagnosis method for an injection molding machine that can check whether a working fluid is leaking.

In order to achieve the above problems, the present invention may include the following configuration.

The fault diagnosis device for an injection molding machine according to the present invention is such that a hydraulic device that supplies working fluid to each of the N actuators (N is an integer greater than 1) of the injection molding machine supplies the working fluid to the first actuator among the actuators. a providing unit providing a first rotation command value to the hydraulic device; As the first rotation command value is provided, the operating speed at which the first actuator operates with the working fluid supplied by the hydraulic device is measured to obtain a first measured speed value, and the first measured speed value is obtained. The first target speed value is obtained by extracting the operating speed at which the first actuator must operate, and extracting the operating speed when the first actuator operates abnormally so that repair or replacement is required according to the first rotation command value. An acquisition unit that acquires a first limit speed value; a diagnostic unit that compares the first measured speed value and the first target speed value and compares the first measured speed value and the first limit speed value; And when the first measured speed value is different from the first target speed value and is a speed value faster than the first limit speed value, the first rotation command to increase the flow rate of the working fluid to be supplied to the first actuator. It may include a correction unit that obtains a first correction value for the value.

The fault diagnosis method for an injection molding machine according to the present invention is such that a hydraulic device that supplies working fluid to each of the N actuators (N is an integer greater than 1) of the injection molding machine supplies the working fluid to the first actuator among the actuators. providing a first rotation command value to the hydraulic device; As the first rotation command value is provided, the operating speed at which the first actuator operates with the working fluid supplied by the hydraulic device is measured to obtain a first measured speed value, and the first measured speed value is obtained. The first target speed value is obtained by extracting the operating speed at which the first actuator must operate, and the operating speed when the first actuator operates abnormally according to the first rotation command value is extracted to obtain the first limit speed value. acquiring; Diagnosing leakage of the working fluid supplied from the hydraulic device to the first actuator using the first rotation command value, the first measured speed value, the first target speed value, and the first limit speed value. step; And when the first measured speed value is different from the first target speed value and is a speed value faster than the first limit speed value, the first rotation command to increase the flow rate of the working fluid to be supplied to the first actuator. It may include obtaining a first correction value for the value.

According to the present invention, the following effects can be achieved.

The present invention is implemented to diagnose whether a leak of working fluid has occurred, thereby shortening the time required for maintenance work compared to performing maintenance work such as repair or replacement after a failure occurs in the actuator. Therefore, it can contribute to increasing the productivity of injection products by increasing the operation rate of the injection molding machine.

The present invention is implemented to compensate for the leakage of the working fluid by increasing the flow rate of the working fluid supplied to the actuator when a leak of the working fluid occurs, thereby reducing the number of times maintenance work is performed, thereby increasing the operation rate of the injection molding machine. can be further increased.

The present invention is implemented so that even if a leak of the working fluid occurs, the operating speed of the actuator can be maintained approximately the same as before the leak of the working fluid, thereby contributing to maintaining the quality of the injection product even if a leak of the working fluid occurs. You can.

1 is a schematic perspective view showing an example of an injection molding machine to which the failure diagnosis device for an injection molding machine and the failure diagnosis method for an injection molding machine according to the present invention are applied.
Figure 2 is a schematic block diagram showing an example of an injection molding machine to which the failure diagnosis device for an injection molding machine and the failure diagnosis method for an injection molding machine according to the present invention are applied.
Figure 3 is a schematic block diagram of a fault diagnosis device for an injection molding machine according to the present invention.
Figure 4 is a schematic configuration diagram showing the connection relationship between the failure diagnosis device for an injection molding machine and the injection molding machine according to the present invention.
5 to 9 are schematic flowcharts of a fault diagnosis method for an injection molding machine according to the present invention.

Hereinafter, an embodiment of a fault diagnosis device for an injection molding machine according to the present invention will be described in detail with reference to the attached drawings.

Referring to Figures 1 to 4, the failure diagnosis device 1 for an injection molding machine according to the present invention is provided in the injection molding machine 100.

Before describing an embodiment of the failure diagnosis device 1 for an injection molding machine according to the present invention, the injection molding machine 100 will be described as follows.

The injection molding machine 100 is used to manufacture injection products. The injection molding machine 100 includes an injection device 200, a mold clamping device 300, and a hydraulic device 400.

The injection device 200 is responsible for supplying the molding material in a molten state to the mold clamping device 300. The injection device 200 includes a barrel 210, an injection body 220 to which the barrel 210 is coupled, an injection screw 230 disposed inside the barrel 210, and driving the injection screw 230. It includes an injection unit 240 and a moving unit 250 that moves the injection body 220. The barrel 210 may be arranged parallel to the first axis direction (X-axis direction). The first axis direction (X-axis direction) may be an axis direction parallel to the direction in which the injection body 220 and the mold clamping device 300 are spaced apart from each other.

When the molding material is supplied into the barrel 210, the injection drive unit 240 rotates the injection screw 230 to move the molding material supplied into the barrel 2 forward (in the direction of arrow FD). It can be moved. In this process, the molding material can be melted by friction. The front (FD arrow direction) is a direction from the injection body 220 toward the barrel 210 and may be parallel to the first axis direction (X-axis direction). When the molten molding material is located in the front (FD arrow direction) with respect to the injection screw 230, the injection drive unit 240 can move the injection screw 230 to the front (FD arrow direction). there is. Accordingly, the molding material in a molten state can be supplied from the barrel 210 to the clamping device 300. The injection drive unit 240 can move the injection screw 230 along the first axis direction (X-axis direction) using an actuator.

In this case, the molding material in a molten state may be supplied to the clamping device 300 through a nozzle (not shown) coupled to the barrel 210. The nozzle may be coupled to the barrel 210 so as to be located in the front (direction of arrow FD) with respect to the barrel 210. Before the molten molding material is supplied to the mold clamping device 300 through the nozzle, the moving unit 250 moves the injection body 220 forward (in the direction of arrow FD) to move the nozzle to the It can be inserted into the mold clamping device 300. The moving unit 250 may move the injection body 220 along the first axis direction (X-axis direction) using an actuator.

The mold clamping device 300 serves to solidify the molten molding material through cooling. The clamping device 300 includes a fixed template 310 to which a fixed mold (not shown) is coupled, a movable template 320 to which a movable mold (not shown) is coupled, and a mold opening and closing unit ( 330). When the movable mold and the fixed mold are closed as the mold opening/closing unit 330 moves the movable platen 320, the injection device 200 closes the movable mold and the fixed mold through the fixed platen 310. Molten molding material is supplied into the mold. After the interior of the movable mold and the fixed mold are filled with the molten molding material and the molten molding material solidifies through cooling, the mold opening/closing unit 330 moves the movable mold 320 to form the movable mold and The fixed mold is opened. The mold opening/closing unit 330 can move the movable platen 320 along the first axis direction (X-axis direction) using an actuator.

The hydraulic device 400 supplies working fluid to each of the actuators. Each of the actuators can operate using the working fluid supplied from the hydraulic device 400. The injection molding machine 1 may include N actuators (N is an integer greater than 1). The hydraulic device 400 may supply working fluid to all or some of the N actuators. For example, the hydraulic device 400 may supply working fluid to each of the actuators of the injection driving unit 240, the actuator of the moving unit 250, and the actuator of the mold opening and closing unit 330. The hydraulic device 400 may include a hydraulic pump and a servomotor that operates the hydraulic pump. The servomotor can control the flow rate of the working fluid supplied by the hydraulic pump by controlling the speed at which the hydraulic pump rotates.

The malfunction diagnosis device 1 for an injection molding machine according to the present invention diagnoses a malfunction of the injection molding machine 100 by detecting whether there is a leak of the working fluid supplied by the hydraulic device 400. To this end, the failure diagnosis device 1 for an injection molding machine according to the present invention may include a provision unit 2, an acquisition unit 3, a diagnosis unit 4, and a correction unit 5.

Referring to FIGS. 1 to 4, the providing unit 2 provides a rotation command value to the hydraulic device 400 so that the hydraulic device 400 supplies working fluid. The hydraulic device 400 operates according to the rotation command value provided from the providing unit 2, thereby supplying working fluid at a flow rate corresponding to the rotation command value. The rotation command value may be preset by the operator depending on the function of the actuator, the operation performed by the actuator, the type of injection molding, the type of molding material, etc. The provider 2 may provide the rotation command value to the hydraulic device 400 through wired communication, wireless communication, etc. The providing unit 2 may provide the rotation command value to the servomotor of the hydraulic device 400.

The provider 2 may provide a first rotation command value to the hydraulic device 400 to supply working fluid to the first actuator 110 among the actuators. The first actuator 110 may be any one of an actuator included in the injection unit 240, an actuator included in the moving unit 250, and an actuator included in the mold opening/closing unit 330. The first rotation command value may vary depending on the flow rate of the working fluid required for the first actuator 110 to operate. The first rotation command value may be preset by the operator depending on the function of the first actuator 110, the operation performed by the first actuator 110, the type of injection molding, the type of molding material, etc. When the providing unit 2 provides the first rotation command value to the hydraulic device 400, the hydraulic device 400 operates according to the first rotation command value to supply the working fluid to the first actuator 110. ) can be supplied. In this case, the working fluid may flow along the first pipe 410 and be supplied to the first actuator 110.

The provider 2 may provide a second rotation command value to the hydraulic device 400 to supply working fluid to the second actuator 120 among the actuators. The second actuator 120 may be any one of an actuator included in the injection unit 240, an actuator included in the moving unit 250, and an actuator included in the mold opening/closing unit 330. The second actuator 120 and the first actuator 110 are different from each other. The second rotation command value may vary depending on the flow rate of the working fluid required for the second actuator 120 to operate. The second rotation command value may be preset by the operator depending on the function of the second actuator 120, the operation performed by the second actuator 120, the type of injection molding, the type of molding material, etc. When the providing unit 2 provides the second rotation command value to the hydraulic device 400, the hydraulic device 400 operates according to the second rotation command value to supply the working fluid to the second actuator 120. ) can be supplied. In this case, the working fluid may flow along the second pipe 420 and be supplied to the second actuator 120. The second pipe 420 and the first pipe 410 may be connected to the hydraulic device 400 through a common pipe. In this case, a first opening/closing valve 411 may be installed in the first pipe 410, and a second opening/closing valve 421 may be installed in the second pipe 420. When the first opening/closing valve 411 opens the first pipe 410 and the second opening/closing valve 421 closes the second pipe 420, the hydraulic device 400 supplies Working fluid may be supplied to the first actuator 110. When the first on/off valve 411 closes the first pipe 410 and the second on/off valve 421 opens the second pipe 420, the hydraulic device 400 supplies Working fluid may be supplied to the second actuator 120.

The provider 2 may provide a third rotation command value to the hydraulic device 400 to supply working fluid to the third actuator 130 among the actuators. The third actuator 130 may be any one of an actuator included in the injection driving unit 240, an actuator included in the moving unit 250, and an actuator included in the mold opening/closing unit 330. The third actuator 130, the second actuator 120, and the first actuator 110 are different from each other. The third rotation command value may vary depending on the flow rate of the working fluid required for the third actuator 130 to operate. The third rotation command value may be preset by the operator depending on the function of the third actuator 130, the operation performed by the third actuator 130, the type of injection molding, the type of molding material, etc. When the providing unit 2 provides the third rotation command value to the hydraulic device 400, the hydraulic device 400 operates according to the third rotation command value to supply the working fluid to the third actuator 130. ) can be supplied. In this case, the working fluid may flow along the third pipe 430 and be supplied to the third actuator 130. The third pipe 430 may be connected to the hydraulic device 400 through the common pipe. In this case, a third opening/closing valve 431 may be installed in the third pipe 430. As the third on/off valve 431 selectively opens and closes the third pipe 430, the working fluid can be selectively supplied to the third actuator 130.

In the above, it has been described that the providing unit 2 provides three types of rotation command values to the hydraulic device 400 to supply working fluid to each of the three actuators, but the provision is not limited to this and the providing unit 2 may be implemented to provide four or more types of rotation command values to the hydraulic device 400 to supply working fluid to each of four or more actuators.

Referring to Figures 1 to 4, the acquisition unit 3 acquires the measured speed value, target speed value, and limit speed value.

The measured speed value relates to the operating speed at which the actuator operates with the working fluid supplied by the hydraulic device 400 according to the rotation command value. The measured speed value can be obtained by a measuring instrument measuring the operating speed at which the actuator operates and providing the measured value to the acquisition unit 3. The measuring device can provide measured values to the acquisition unit 3 through wired communication, wireless communication, etc. The acquisition unit 3 may acquire the measured speed value using the measured value provided from the measuring device.

The target speed value relates to an operating speed at which the actuator must operate according to the rotation command value. The target speed value may be an operating speed when the actuator operates normally as the working fluid supplied by the hydraulic device 400 according to the rotation command value is delivered to the actuator without leakage. The target speed value and the rotation command value may be stored in the storage unit 10 in the form of a lookup table matched by size. The target speed value may be preset by the operator and stored in the storage unit 10. The acquisition unit 3 may obtain the target speed value by extracting the target speed value corresponding to the rotation command value from the storage unit 10.

The limit speed value relates to an operating speed when the actuator operates abnormally according to the rotation command value. The limit speed value may be an operating speed when the actuator operates abnormally as only a portion of the working fluid supplied by the hydraulic device 400 according to the rotation command value is delivered to the actuator due to leakage. The limit speed value and the rotation command value may be stored in the storage unit 10 in the form of a lookup table matched by size. The limit speed value is an operating speed at which repair or replacement is required due to leakage, and may be preset by the operator and stored in the storage unit 10. The acquisition unit 3 may obtain the limit speed value by extracting the limit speed value corresponding to the rotation command value from the storage unit 10. The acquisition unit 3 may obtain the limit speed value by extracting the limit speed value through calculation on the target speed value corresponding to the rotation command value. For example, the acquisition unit 3 may obtain the limit speed value by extracting 50% of the target speed value as the limit speed value through calculation on the target speed value corresponding to the rotation command value. .

When the providing unit 2 provides the first rotation command value to the hydraulic device 400, the acquiring unit 3 measures the operating speed at which the first actuator 110 operates and makes the first measurement. Obtain a speed value, extract the operating speed at which the first actuator 110 should operate according to the first rotation command value, obtain a first target speed value, and obtain the first target speed value according to the first rotation command value. The first limit speed value can be obtained by extracting the operating speed when the actuator 110 operates abnormally. The operating speed at which the first actuator 110 operates can be measured by a first measuring device 140 (shown in FIG. 3). The acquisition unit 3 may obtain the first measurement speed value by receiving the measurement value measured by the first measurement device 140.

When the providing unit 2 provides the second rotation command value to the hydraulic device 400, the acquiring unit 3 measures the operating speed at which the second actuator 120 operates and performs the second measurement. Obtain a speed value, extract the operating speed at which the second actuator 120 should operate according to the second rotation command value, obtain a second target speed value, and obtain the second target speed value according to the second rotation command value. The second limit speed value can be obtained by extracting the operating speed when the actuator 120 operates abnormally. The operating speed at which the second actuator 120 operates can be measured by a second measuring device 150 (shown in FIG. 3). The acquisition unit 3 may obtain the second measurement speed value by receiving the measurement value measured by the second measurement device 150.

When the providing unit 2 provides the third rotation command value to the hydraulic device 400, the acquiring unit 3 measures the operating speed at which the third actuator 130 operates and makes the third measurement. Obtain a speed value, extract the operating speed at which the third actuator 130 should operate according to the third rotation command value, obtain a third target speed value, and obtain a third target speed value according to the third rotation command value. The third limit speed value can be obtained by extracting the operating speed when the actuator 130 operates abnormally. The operating speed at which the third actuator 130 operates can be measured by a third measuring device 160 (shown in FIG. 3). The acquisition unit 3 may obtain the third measurement speed value by receiving the measurement value measured by the third measurement device 160.

Referring to Figures 1 to 4, the diagnostic unit 4 compares the measured speed value and the target speed value, and compares the measured speed value and the limit speed value.

The diagnosis unit 4 may compare the measured speed value and the target speed value and determine whether the measured speed value matches the target speed value, thereby diagnosing whether leakage of the working fluid has occurred.

For example, if the difference between the measured speed value and the target speed value is within a preset reference range, the diagnosis unit 4 may determine that the measured speed value and the target speed value match. Accordingly, the diagnosis unit 4 can diagnose that the leak of the working fluid has occurred to the extent that the actuator can operate normally even if no leak of the working fluid has occurred or even if the leak of the working fluid has occurred. The reference range may be set in advance by the operator. The reference range may be stored in the storage unit 10.

For example, if the difference between the measured speed value and the target speed value is outside the reference range, the diagnostic unit 4 may determine that the measured speed value and the target speed value are different. Accordingly, the diagnostic unit 4 can diagnose that leakage of the working fluid has occurred to the extent that the actuator cannot operate normally by maintaining the rotation command value as is.

When the measured speed value and the target speed value are different, the diagnostic unit 4 compares the measured speed value and the limit speed value to determine whether the measured speed value is a slower speed value than the limit speed value. By determining whether the leakage of the working fluid is at a level that can be resolved through correction of the rotation command value, it can be diagnosed.

For example, if the measured speed value is different from the target speed value and is a slower speed value than the limit speed value, the diagnostic unit 4 may resolve the leakage of the working fluid through correction of the rotation command value. It can be diagnosed as non-existent. When the measured speed value and the limit speed value match, the diagnostic unit 4 may diagnose that the leakage of the working fluid is at a level that cannot be resolved through correction of the rotation command value.

For example, if the measured speed value is different from the target speed value and is faster than the limit speed value, the diagnostic unit 4 may determine that leakage of the working fluid can be resolved through correction of the rotation command value. It can be diagnosed as being present.

When the providing unit 2 provides the first rotation command value to the hydraulic device 400, the diagnostic unit 4 compares the first measured speed value and the first target speed value, and The first measured speed value and the first limit speed value can be compared. The diagnostic unit 4 may compare the first measured speed value and the first limit speed value only when it is determined that the first measured speed value and the first target speed value are different.

When the providing unit 2 provides the second rotation command value to the hydraulic device 400, the diagnostic unit 4 compares the second measured speed value and the second target speed value, and The second measured speed value and the second limit speed value can be compared. The diagnostic unit 4 may compare the second measured speed value and the second limit speed value only when it is determined that the second measured speed value and the second target speed value are different.

When the providing unit 2 provides the third rotation command value to the hydraulic device 400, the diagnostic unit 4 compares the third measured speed value and the third target speed value, and The third measured speed value and the third limit speed value can be compared. The diagnostic unit 4 may compare the third measured speed value and the third limit speed value only when it is determined that the third measured speed value and the third target speed value are different.

Referring to Figures 1 to 4, the correction unit 5 determines the flow rate of the working fluid to be supplied to the actuator when the measured speed value is different from the target speed value and is a speed value that is faster than the limit speed value. The purpose is to obtain a correction value for the rotation command value to increase it. The correction value is a flow rate value that increases the flow rate of the working fluid to compensate for leakage of the working fluid, and can be set in advance by the operator. The correction value may be stored in the storage unit 10. The correction value may be set differently depending on the number of times it is diagnosed whether the leakage of the working fluid is at a level that can be resolved through correction of the rotation command value. The correction value may increase as the number of diagnoses increases. The correction unit 5 may obtain the correction value and then provide it to the provision unit 2. Thereafter, the rotation command value provided by the provider 2 may be determined by reflecting the correction value. For example, when the rotation command value for operating the actuator at an operating speed of 10 m/s is determined to be 10 rpm and the correction unit 5 obtains a correction value of 1.1%, the provision unit 2 ) can be provided by determining a rotation command value of 11 rpm for operating the actuator at an operating speed of 10 m/s.

When the providing unit 2 provides the first rotation command value to the hydraulic device 400, the correction unit 5 determines that the first measured speed value is different from the first target speed value and the first rotation command value is provided to the hydraulic device 400. If the speed value is faster than the 1 limit speed value, a first correction value for the first rotation command value can be obtained so that the flow rate of the working fluid to be supplied to the first actuator 110 increases. Thereafter, the first rotation command value provided by the providing unit 2 may be determined by reflecting the first correction value.

When the providing unit 2 provides the second rotation command value to the hydraulic device 400, the correction unit 5 determines that the second measured speed value is different from the second target speed value and the second rotation command value is provided to the hydraulic device 400. 2 If the speed value is faster than the limit speed value, a second correction value for the second rotation command value can be obtained so that the flow rate of the working fluid to be supplied to the second actuator 120 increases. Thereafter, the second rotation command value provided by the providing unit 2 may be determined by reflecting the second correction value.

When the providing unit 2 provides the third rotation command value to the hydraulic device 400, the correction unit 5 determines that the third measured speed value is different from the third target speed value and the third rotation command value is provided to the hydraulic device 400. If the speed value is faster than the third limit speed value, a third correction value for the third rotation command value can be obtained so that the flow rate of the working fluid to be supplied to the third actuator 130 increases. Afterwards, the third rotation command value provided by the providing unit 2 may be determined by reflecting the third correction value.

As described above, the fault diagnosis device 1 for an injection molding machine according to the present invention is capable of diagnosing whether leakage of working fluid has occurred through comparison of the measured speed value and the target speed value according to the rotation command value. It is implemented. Accordingly, the failure diagnosis device 1 for an injection molding machine according to the present invention can check whether leakage of the working fluid has occurred before a failure occurs in the actuator, and thus repair or replace the actuator after a failure occurs. The time taken for maintenance work can be shortened compared to performing maintenance work such as Therefore, the failure diagnosis device 1 for an injection molding machine according to the present invention can contribute to increasing the productivity of injection products by increasing the operation rate of the injection molding machine 100.

In addition, the fault diagnosis device 1 for an injection molding machine according to the present invention obtains the correction value through comparison of the measured speed value and the limit speed value according to the rotation command value, thereby determining the level of the working fluid supplied to the actuator. It is implemented to compensate for leakage of the working fluid by increasing the flow rate. Accordingly, the failure diagnosis device 1 for an injection molding machine according to the present invention compensates and maintains the leakage of the working fluid using the correction value in contrast to performing maintenance work whenever a leakage of the working fluid occurs. Since the number of times maintenance work is performed can be reduced, the operation rate of the injection molding machine 100 can be further increased. In addition, the fault diagnosis device 1 for an injection molding machine according to the present invention can maintain the operating speed of the actuator approximately the same as before the leak of the working fluid using the correction value even if a leak of the working fluid occurs. Therefore, it can contribute to maintaining the quality of injection products even when leakage of working fluid occurs.

Referring to FIGS. 1 to 4 , the failure diagnosis device 1 for an injection molding machine according to the present invention may include a transmission unit 6.

The transmission unit 6 transmits leakage information about the pipe connecting the actuator and the hydraulic system when the measured speed value is different from the target speed value and is a slower speed value than the limit speed value. . The leakage information is obtained by the correction unit 5, including the difference between the measured speed value and the target speed value, the number of times of diagnosis to determine whether the leakage of the working fluid is at a level that can be resolved through correction of the rotation command value, and It may include correction values, etc.

If the difference between the measured speed value and the limit speed value is less than or equal to a preset reference value, the transmitting unit 6 may transmit the leakage information to the pre-registered first terminal. The reference value may be set in advance by the operator. The reference value may be stored in the storage unit 10. The first terminal may belong to an operator in charge of the injection molding machine 100. The first terminal may be registered in advance by the operator. Accordingly, the failure diagnosis method (1) for an injection molding machine according to the present invention is implemented so that the operation manager can check the leakage information through the first terminal. Without going to the place where the injection molding machine 100 is installed, the operation manager can decide whether to perform maintenance work on the injection molding machine 100 directly or have a repair person perform it through the leakage information. Therefore, the failure diagnosis method 1 for an injection molding machine according to the present invention can contribute to shortening the time required to perform maintenance work on the injection molding machine 100 by using the leakage information.

If the difference between the measured speed value and the limit speed value is greater than the reference value, the transmitting unit 6 may transmit the leakage information to a pre-registered second terminal. The second terminal may belong to a person in charge of repairing the injection molding machine 100. The second terminal may be registered in advance by the operator. Accordingly, the failure diagnosis method (1) for an injection molding machine according to the present invention is implemented so that the repair person can immediately check the leakage information without going through the judgment of the operation person. Therefore, the failure diagnosis method 1 for an injection molding machine according to the present invention can contribute to further shortening the time it takes to perform maintenance work on the injection molding machine 100 by using the leakage information.

When the providing unit 2 provides the first rotation command value to the hydraulic device 400, the transmitting unit 6 provides the first rotation command value while the first measured speed value is different from the first target speed value. If the speed value is slower than the 1 limit speed value, the first leakage information about the first pipe 410 can be transmitted. In this case, the transmitting unit 6 may transmit the first leakage information to the first terminal if the difference between the first measured speed value and the first limit speed value is less than or equal to the reference value. The transmitting unit 6 may transmit the first leakage information to the second terminal when the difference between the first measured speed value and the first limit speed value is greater than the reference value.

When the providing unit 2 provides the second rotation command value to the hydraulic device 400, the transmitting unit 6 determines that the second measured speed value is different from the second target speed value and the second rotation command value is provided to the hydraulic device 400. 2 If the speed value is slower than the limit speed value, the second leakage information about the second pipe 420 can be transmitted. In this case, the transmitting unit 6 may transmit the second leakage information to the first terminal if the difference between the second measured speed value and the second limit speed value is less than or equal to the reference value. The transmitting unit 6 may transmit the second leakage information to the second terminal when the difference between the second measured speed value and the second limit speed value is greater than the reference value.

When the providing unit 2 provides the third rotation command value to the hydraulic device 400, the transmitting unit 6 provides the third rotation command value while the third measured speed value is different from the third target speed value. 3 If the speed value is slower than the limit speed value, third leakage information about the third pipe 430 can be transmitted. In this case, the transmitting unit 6 may transmit the third leakage information to the first terminal if the difference between the third measured speed value and the third limit speed value is less than or equal to the reference value. The transmitting unit 6 may transmit the third leakage information to the second terminal when the difference between the third measured speed value and the third limit speed value is greater than the reference value.

Hereinafter, an embodiment of the failure diagnosis method for an injection molding machine according to the present invention will be described in detail with reference to the attached drawings.

Referring to Figures 1 to 5, the failure diagnosis method for an injection molding machine according to the present invention diagnoses whether the injection molding machine 100 is broken by determining whether a leak of the working fluid supplied by the hydraulic device 400 occurs. It is done. The fault diagnosis method for an injection molding machine according to the present invention can be performed through the fault diagnosis device 1 for an injection molding machine according to the present invention described above.

The fault diagnosis method for an injection molding machine according to the present invention may include a rotation command value providing step (S100), a speed value acquisition step (S200), a leakage diagnosis step (S300), and a correction value acquisition step (S400).

The rotation command value providing step (S100) can be performed by providing a rotation command value to the hydraulic device 400 that supplies working fluid to each of the N actuators of the injection molding machine 100. The hydraulic device 400 may supply working fluid to each of the actuators according to the rotation command value. In this case, the working fluid supplied by the hydraulic device 400 may be selectively supplied to any one of the actuators. The rotation command value providing step (S100) may be performed by the providing unit (2).

The speed value acquisition step (S200) may be performed by acquiring the measured speed value, the target speed value, and the limit speed value. The measured speed value is obtained by measuring the operating speed at which one of the actuators operates with the working fluid supplied by the hydraulic device 100 as the rotation command value is provided. The target speed value is obtained by extracting the operating speed at which the actuator supplied with the working fluid should operate according to the rotation command value. The limit speed value is obtained by extracting the operating speed when the actuator supplied with the working fluid according to the rotation command value operates abnormally. The speed value acquisition step (S200) may be performed by the acquisition unit 3.

The leak diagnosis step (S300) is performed by diagnosing leakage of the working fluid supplied from the hydraulic device to the working fluid using the rotation command value, the measured speed value, the target speed value, and the limit speed value. It can be done. The leak diagnosis step (S300) is performed by comparing the measured speed value obtained according to the rotation command value and the target speed value, and comparing the measured speed value obtained according to the rotation command value with the limit speed value. , it is possible to diagnose whether there is a leak in the working fluid. The leak diagnosis step (S300) may be performed by the diagnosis unit 4.

The correction value acquisition step (S400) may be performed by obtaining a correction value for the rotation command value so that the flow rate of the working fluid to be supplied to the actuator increases according to the result of performing the leak diagnosis step (S300). If, in the leak diagnosis step (S300), the measured speed value is different from the target speed value and the actuator is diagnosed to have a faster speed value than the limit speed value, the correction value acquisition step (S400) is performed on the corresponding actuator. This can be achieved by obtaining a correction value for the rotation command value so that the flow rate of the working fluid to be supplied increases. The correction value acquisition step (S400) may be performed by the correction unit 5. After the correction value is acquired through the correction value acquisition step (S400), the rotation command value may be determined by reflecting the correction value in the rotation command value providing step (S100).

As described above, the failure diagnosis method for an injection molding machine according to the present invention can achieve the following effects.

First, the fault diagnosis method for an injection molding machine according to the present invention is implemented to diagnose whether leakage of working fluid has occurred using the rotation command value, the measurement speed value, the target speed value, and the limit speed value. do. Accordingly, the failure diagnosis method for an injection molding machine according to the present invention can determine whether leakage of the working fluid has occurred before a failure occurs in the actuator, so maintenance such as repair and replacement after a failure occurs in the actuator. The time taken for maintenance work can be shortened compared to performing repair work. Therefore, the failure diagnosis method for an injection molding machine according to the present invention can contribute to increasing the productivity of injection products by increasing the operation rate of the injection molding machine 100.

Second, the fault diagnosis method for an injection molding machine according to the present invention obtains the correction value using the rotation command value, the measurement speed value, the target speed value, and the limit speed value, so that the working fluid supplied to the actuator It is implemented to compensate for leakage of the working fluid by increasing the flow rate. Accordingly, the failure diagnosis method for an injection molding machine according to the present invention compensates for the leakage of the working fluid using the correction value, compared to performing maintenance work whenever a leak of the working fluid occurs. Since the number of operations can be reduced, the operation rate of the injection molding machine 100 can be further increased. In addition, the failure diagnosis method for an injection molding machine according to the present invention can maintain the operating speed of the actuator approximately the same as before the leak of the working fluid by using the correction value even if a leak of the working fluid occurs, so that the operating speed can be maintained approximately the same as before the leak of the working fluid occurs. Even when fluid leakage occurs, it can contribute to maintaining the quality of injection products.

The failure diagnosis method for an injection molding machine according to the present invention may include a leakage information transmission step (S500).

The leakage information transmission step (S500) may be performed by transmitting leakage information about the pipe connecting the actuator and the hydraulic device 400 according to the result of performing the leakage diagnosis step (S300). In the leakage diagnosis step (S300), if the measured speed value is different from the target speed value and the measured speed value is diagnosed as an actuator showing a speed value that is equal to or slower than the limit speed value, the leakage information is transmitted. Step S500 may be accomplished by transmitting the leakage information. The leakage information transmission step (S500) may be performed by the transmission unit 6. The leakage information may be transmitted to the first terminal and provided to an operator in charge of the injection molding machine 100. The leakage information may be transmitted to the second terminal and provided to a repair person for the injection molding machine 100. The leakage information may be transmitted to both the first terminal and the second terminal and provided to both operation personnel and repair personnel.

Accordingly, the failure diagnosis method for an injection molding machine according to the present invention can provide the leakage information to at least one of the operation person and the repair person, so that at least one of the operation person and the repair person is at the place where the injection molding machine 100 is installed. It is implemented so that the status of the injection molding machine 100 can be checked through the leakage information without going to the. Therefore, the failure diagnosis method for an injection molding machine according to the present invention can contribute to shortening the time it takes to perform maintenance work on the injection molding machine 100 by using the leakage information.

Referring to FIGS. 1 to 7 , when the hydraulic device 400 supplies working fluid to the first actuator 110, the failure diagnosis method for an injection molding machine according to the present invention can be implemented as follows.

First, the rotation command value providing step (S100) may include providing a first rotation command value (S110). The step of providing the first rotation command value (S110) involves providing the first rotation command to the hydraulic device 400 so that working fluid is supplied to the first actuator 110 among the actuators of the injection molding machine 100. This can be done by providing a value. The step of providing the first rotation command value (S110) may be performed by the providing unit 2. For example, the first actuator 110 may be the mold opening/closing unit 330. In this case, the first actuator 110 may be connected to the hydraulic device 400 through the first pipe 410. A first opening/closing valve 411 is installed in the first pipe 410.

Next, the speed value acquisition step (S200) may include a step of acquiring the first speed value (S210). The step of acquiring the first speed value (S210) may be performed by acquiring the first measured speed value, the first target speed value, and the first limit speed value. The step of acquiring the first speed value (S210) may be performed by the acquisition unit 3. The acquisition unit 3 may obtain the first measurement speed value by receiving the measurement value measured by the first measurement device 140. The acquisition unit 3 may obtain the first target speed value by extracting the first target speed value corresponding to the first rotation command value from the storage unit 10. The acquisition unit 3 may obtain the first limit speed value by extracting the first limit speed value corresponding to the first rotation command value from the storage unit 10. The acquisition unit 3 may obtain the first limit speed value by extracting the first limit speed value through calculation on the first target speed value corresponding to the first rotation command value.

Next, the leakage diagnosis step (S300) may include a step (S310) of diagnosing the leakage of the working fluid supplied to the first actuator. The step (S310) of diagnosing whether there is a leak of the working fluid supplied to the first actuator uses the first rotation command value, the first measured speed value, the first target speed value, and the first limit speed value. This can be done by diagnosing whether there is a leak of the working fluid supplied from the hydraulic device 400 to the first actuator 110. In the step (S310) of diagnosing whether there is a leak of the working fluid supplied to the first actuator, the first measured speed value obtained according to the first rotation command value and the first target speed value are compared, and the first This can be achieved by comparing the first measured speed value obtained according to the rotation command value and the first limit speed value. The step (S310) of diagnosing whether there is a leak of the working fluid supplied to the first actuator may be performed by the diagnosis unit 4.

Next, the correction value acquisition step (S400) may include a step of acquiring a first correction value (S410). The step of acquiring the first correction value (S410) determines whether the working fluid to be supplied to the first actuator 110 is determined according to the result of the step of diagnosing whether there is a leak of the working fluid supplied to the first actuator (S310). This can be achieved by obtaining a first correction value for the first rotation command value so that the flow rate increases. In the step of diagnosing whether there is a leak of the working fluid supplied to the first actuator (S310), the first actuator 110 determines that the first measured speed value is different from the first target speed value and the first limit speed value. If it is diagnosed as showing a faster speed value compared to This can be achieved by obtaining the first correction value. The step of obtaining the first correction value (S410) may be performed by the correction unit 5. After the first correction value is obtained through the step of acquiring the first correction value (S410), in the step of providing the first rotation command value (S110), the first rotation command value is the first correction value. It can be determined by reflecting the value.

As described above, the fault diagnosis method for an injection molding machine according to the present invention is to detect the first actuator using the first rotation command value, the first measured speed value, the first target speed value, and the first limit speed value. It is implemented to diagnose whether a leak of the working fluid supplied to (110) has occurred. Accordingly, the failure diagnosis method for an injection molding machine according to the present invention can determine whether leakage of the working fluid has occurred before a failure occurs in the first actuator 110, so that the failure of the first actuator 110 The time taken for maintenance work can be shortened when compared to performing maintenance work after this has occurred.

In addition, the fault diagnosis method for an injection molding machine according to the present invention determines the first correction value using the first rotation command value, the first measurement speed value, the first target speed value, and the first limit speed value. By obtaining this, the flow rate of the working fluid supplied to the first actuator 110 is increased to compensate for leakage of the working fluid. Accordingly, the failure diagnosis method for an injection molding machine according to the present invention uses the first correction value when comparing maintenance work whenever a leak of the working fluid supplied to the first actuator 110 occurs. By compensating for leakage of the working fluid supplied to the first actuator 110, the number of times maintenance work is performed can be reduced. In addition, the failure diagnosis method for an injection molding machine according to the present invention uses the first correction value to adjust the operating speed of the first actuator 110 even if there is a leak of the working fluid supplied to the first actuator 110. Since the fluid can be maintained approximately as it was before the leak occurred, it can contribute to maintaining the quality of the injection product even when the working fluid supplied to the first actuator 110 leaks.

Next, the leak information transmission step (S500) may include a step of transmitting first leak information (S510).

The step of transmitting the first leak information (S510) is to determine whether the first actuator 110 and the hydraulic device ( This can be achieved by transmitting the first leakage information about the first pipe 410 connecting the 400). In the step of diagnosing whether there is a leak of the working fluid supplied to the first actuator (S310), the first actuator 110 determines that the first measured speed value is different from the first target speed value and the first measured speed If it is diagnosed that the value represents a speed value that is the same as or slower than the first limit speed value, the step of transmitting the first leakage information (S510) can be performed by transmitting the first leakage information. The step of transmitting the first leakage information (S510) may be performed by the transmission unit 6. The first leak information may be provided to at least one of the first terminal and the second terminal.

Accordingly, the failure diagnosis method for an injection molding machine according to the present invention can provide the first leakage information to at least one of the operation person and the repair person, so that at least one of the operation person and the repair person is the injection molding machine 100. It is implemented so that the leakage state of the working fluid supplied to the first actuator 110 can be confirmed through the first leakage information without going to the installation location. Therefore, the failure diagnosis method for an injection molding machine according to the present invention performs maintenance and repair on the first actuator 110, the first pipe 410, and the first opening/closing valve 411 using the first leakage information. It can contribute to shortening the time it takes to perform a task.

Here, the step (S310) of diagnosing whether there is a leak of the working fluid supplied to the first actuator may include the following configuration.

First, it is determined whether the first measured speed value and the first target speed value match (S311). The step S311 of determining whether the first measured speed value matches the first target speed value may be performed by the diagnosis unit 4. The step of determining whether the first measured speed value and the first target speed value match (S311) is performed when the difference between the first measured speed value and the first target speed value is within a first preset reference range. It may be determined that the first measured speed value and the first target speed value match. The first reference range may be set in advance by the operator. The first reference range may be stored in the storage unit 10. If the difference between the first measured speed value and the first target speed value is within the first reference range, the step of providing the first rotation command value may be performed again from step S110. The step of determining whether the first measured speed value and the first target speed value match (S311) is performed when the difference value between the first measured speed value and the first target speed value is outside the first reference range. It may be determined that the first measured speed value and the first target speed value are different.

Next, in the step of determining whether the first measured speed value and the first target speed value match (S311), if it is determined that the first measured speed value and the first target speed value are different, the first measured speed value and the first target speed value are determined to be different from each other. Compare the measured speed value and the first limit speed value (S312). The step (S312) of comparing the first measured speed value and the first limit speed value may be performed by the diagnostic unit 4. In the step of comparing the first measured speed value and the first limit speed value (S312), the first measured speed value is equal to the first limit speed value or the first measured speed value is the first limit speed value. If the speed value is determined to be slower than , a step (S510) of transmitting the first leakage information may be performed. If the first measured speed value is determined to be a faster speed value than the first limit speed value in the step of comparing the first measured speed value and the first limit speed value (S312), the first correction value A step (S410) of acquiring may be performed.

In the step of comparing the first measured speed value and the first limit speed value (S312), if the first measured speed value is determined to be a faster speed value than the first limit speed value, the first actuator The step of diagnosing whether there is a leak of the supplied working fluid (S310) may include a step of determining whether the first diagnosis number has reached the first reference number (S313).

The step of determining whether the first diagnosis number has reached the first standard number (S313) is to compare the first diagnosis number with the first standard number to determine whether the first diagnosis number has reached the first standard number. This can be done by determining whether something has been done or not. The first standard number of times may be set in advance by the operator. The first reference number may be stored in the storage unit 10. The step (S313) of determining whether the number of first diagnosis times has reached the first reference number may be performed by the diagnosis unit 4.

If it is determined that the first diagnosis number is smaller than the first standard number in the step (S313) of determining whether the first diagnosis number has reached the first standard number, the first correction value is obtained. The step (S410) may be performed. For example, when the first reference number of times is 4, the step of obtaining the first correction value (S410) may be performed until the first diagnosis number of times corresponds to 3 times.

If it is determined that the first diagnosis number has reached the first standard number in the step (S313) of determining whether the first diagnosis number has reached the first standard number, transmitting the first leak information Step S510 may be performed. For example, when the first reference number is 4, when the first diagnosis number reaches 4, the step (S510) of transmitting the first leakage information without obtaining the first correction value can be performed. . Therefore, the failure diagnosis method for an injection molding machine according to the present invention can compensate for the leakage of the working fluid supplied to the first actuator 110 by increasing the flow rate of the working fluid using the first correction value, while By applying a limit to the increase in fluid flow rate, an increase in the amount of waste of working fluid can be prevented.

Here, the step of transmitting the first leakage information (S510) may include the following configuration.

First, first leak information is acquired (S511, shown in FIG. 7). The step of acquiring the first leakage information (S511) may be accomplished by acquiring the first leakage information about the first pipe 410 connecting the first actuator 110 and the hydraulic device 400. The step of acquiring the first leakage information (S511) may be performed by the transmission unit 6. The first leakage information may include a difference between the first measured speed value and the first target speed value, the first diagnosis number, the first correction value, etc. In the step of acquiring the first leakage information (S511), the first measured speed value is different from the first target speed value and is the same as the first limit speed value, or the first limit speed value is a slower speed value. It can be done in some cases. Even if the first measured speed value is different from the first target speed value and is a speed value faster than the first limit speed value, the step of acquiring the first leakage information (S511) is the number of times of the first diagnosis. It can be performed when the first standard number of times is reached.

Next, the difference between the first measured speed value and the first limit speed value is compared with the reference value (S512). The step of comparing the difference value with the reference value (S512) may be performed by the transmission unit 6.

Next, if the difference value is determined to be less than the reference value in the step of comparing the difference value with the reference value (S512), the first leakage information is transmitted to the first terminal (S513). Accordingly, the operation manager can check the first leak information through the first terminal. The step of transmitting the first leakage information to the first terminal (S513) may be performed by the transmission unit 6.

Next, if it is determined that the difference value is greater than the reference value in the step of comparing the difference value with the reference value (S512), the first leakage information is transmitted to the second terminal (S514). Accordingly, the repair person can check the first leakage information through the second terminal. The step of transmitting the first leakage information to the second terminal (S514) may be performed by the transmission unit 6. In the step of transmitting the first leakage information to the second terminal (S514), the first leakage information may be transmitted to the first terminal in addition to transmitting the first leakage information to the second terminal.

Referring to FIGS. 1 to 8 , when the hydraulic device 400 supplies working fluid to the second actuator 120, the failure diagnosis method for an injection molding machine according to the present invention can be implemented as follows.

First, the rotation command value providing step (S100) may include providing a second rotation command value (S120). The step of providing the second rotation command value (S120) is to provide the second rotation command to the hydraulic device 400 so that the working fluid is supplied to the second actuator 120 among the actuators of the injection molding machine 100. This can be done by providing a value. The step of providing the second rotation command value (S120) may be performed by the providing unit 2. For example, the second actuator 120 may be the moving unit 250. In this case, the second actuator 120 may be connected to the hydraulic device 400 through the second pipe 420. A second opening/closing valve 421 is installed in the second pipe 420.

Next, the speed value acquisition step (S200) may include a second speed value acquisition step (S220). The step of acquiring the second speed value (S220) may be accomplished by acquiring the second measured speed value, the second target speed value, and the second limit speed value. The step of acquiring the second speed value (S220) may be performed by the acquisition unit 3. The acquisition unit 3 may obtain the second measurement speed value by receiving the measurement value measured by the second measurement device 150. The acquisition unit 3 may obtain the second target speed value by extracting the second target speed value corresponding to the second rotation command value from the storage unit 10. The acquisition unit 3 may obtain the second limit speed value by extracting the second limit speed value corresponding to the second rotation command value from the storage unit 10. The acquisition unit 3 may obtain the second limit speed value by extracting the second limit speed value through calculation on the second target speed value corresponding to the second rotation command value.

Next, the leakage diagnosis step (S300) may include a step (S320) of diagnosing the leakage of the working fluid supplied to the second actuator. The step (S320) of diagnosing whether there is a leak of the working fluid supplied to the second actuator uses the second rotation command value, the second measured speed value, the second target speed value, and the second limit speed value. This can be done by diagnosing whether there is a leak of the working fluid supplied from the hydraulic device 400 to the second actuator 120. The step of diagnosing whether there is a leak of the working fluid supplied to the second actuator (S320) compares the second measured speed value obtained according to the second rotation command value and the second target speed value, and This can be achieved by comparing the second measured speed value obtained according to the rotation command value and the second limit speed value. The step (S320) of diagnosing whether there is a leak of the working fluid supplied to the second actuator may be performed by the diagnosis unit 4.

Next, the correction value acquisition step (S400) may include a second correction value acquisition step (S420). The step of obtaining the second correction value (S420) determines whether the working fluid to be supplied to the second actuator 120 is determined according to the result of the step of diagnosing whether there is a leak of the working fluid supplied to the second actuator (S320). This can be achieved by obtaining a second correction value for the second rotation command value so that the flow rate increases. In the step of diagnosing whether there is a leak of the working fluid supplied to the second actuator (S320), the second actuator 120 determines that the second measured speed value is different from the second target speed value and the second limit speed value. If it is diagnosed as showing a faster speed value compared to This can be achieved by obtaining a second correction value. The step of obtaining the second correction value (S420) may be performed by the correction unit 5. After the second correction value is obtained through the step of acquiring the second correction value (S420), the second rotation command value is the second correction value in the step of providing the second rotation command value (S120). It can be determined by reflecting the value.

As described above, the fault diagnosis method for an injection molding machine according to the present invention is to detect the second actuator using the second rotation command value, the second measured speed value, the second target speed value, and the second limit speed value. It is implemented to diagnose whether a leak of the working fluid supplied to (120) has occurred. Accordingly, the failure diagnosis method for an injection molding machine according to the present invention can determine whether leakage of the working fluid has occurred before a failure occurs in the second actuator 120, so that the failure of the second actuator 120 The time taken for maintenance work can be shortened when compared to performing maintenance work after this has occurred.

In addition, the fault diagnosis method for an injection molding machine according to the present invention determines the second correction value using the second rotation command value, the second measurement speed value, the second target speed value, and the second limit speed value. By obtaining this, the flow rate of the working fluid supplied to the second actuator 120 is increased to compensate for leakage of the working fluid. Accordingly, the failure diagnosis method for an injection molding machine according to the present invention uses the second correction value in contrast to performing maintenance work whenever a leak of the working fluid supplied to the second actuator 120 occurs. By compensating for leakage of the working fluid supplied to the second actuator 120, the number of times maintenance work is performed can be reduced. In addition, the fault diagnosis method for an injection molding machine according to the present invention uses the second correction value to adjust the operating speed of the second actuator 120 even if there is a leak of the working fluid supplied to the second actuator 120. Since the fluid can be maintained at approximately the same level as before the leak occurred, it can contribute to maintaining the quality of the injection product even when the working fluid supplied to the second actuator 120 leaks.

Next, the leakage information transmission step (S500) may include a step of transmitting second leakage information (S520).

The step of transmitting the second leakage information (S520) is to determine whether the second actuator 120 and the hydraulic device ( This can be accomplished by transmitting second leakage information about the second pipe 420 connecting 400). In the step of diagnosing whether there is a leak of the working fluid supplied to the second actuator (S320), the second actuator 120 determines that the second measured speed value is different from the second target speed value and the second measured speed When it is diagnosed that the value represents a speed value that is the same as or slower than the second limit speed value, the step of transmitting the second leakage information (S520) can be performed by transmitting the second leakage information. The step of transmitting the second leakage information (S520) may be performed by the transmission unit 6. The second leak information may be provided to at least one of the first terminal and the second terminal.

Accordingly, the failure diagnosis method for an injection molding machine according to the present invention can provide the second leakage information to at least one of the operation person and the repair person, so that at least one of the operation person and the repair person is the injection molding machine 100. It is implemented so that the leakage state of the working fluid supplied to the second actuator 120 can be confirmed through the second leakage information without going to the installation location. Therefore, the failure diagnosis method for an injection molding machine according to the present invention performs maintenance and repair on the second actuator 120, the second pipe 420, and the second opening/closing valve 421 using the second leakage information. It can contribute to shortening the time it takes to perform a task.

In the step of transmitting the second leakage information (S520), the first diagnosis count and the first correction value up to the time the second leakage information is acquired may also be transmitted. Accordingly, the failure diagnosis method for an injection molding machine according to the present invention is implemented to transmit the first leakage information together in the process of transmitting the second leakage information. Therefore, the failure diagnosis method for an injection molding machine according to the present invention is implemented to check the leakage state of the working fluid supplied to the second actuator 120 and the leakage state of the working fluid supplied to the first actuator 110. , the ease and accuracy of maintenance work can be improved.

Here, the step (S320) of diagnosing whether there is a leak of the working fluid supplied to the second actuator may include the following configuration.

First, it is determined whether the second measured speed value and the second target speed value match (S321). The step S321 of determining whether the second measured speed value matches the second target speed value may be performed by the diagnosis unit 4. The step of determining whether the second measured speed value and the second target speed value match (S321) is performed when the difference between the second measured speed value and the second target speed value is within a preset second reference range. It may be determined that the second measured speed value and the second target speed value match. The second reference range may be set in advance by the operator. The second reference range may be stored in the storage unit 10. If the difference between the second measured speed value and the second target speed value is within the second reference range, the step of providing the second rotation command value may be performed again from step S120. The step of determining whether the second measured speed value and the second target speed value match (S321) is performed when the difference value between the second measured speed value and the second target speed value is outside the second reference range. It may be determined that the second measured speed value and the second target speed value are different.

Next, in the step of determining whether the second measured speed value and the second target speed value match (S321), if it is determined that the second measured speed value and the second target speed value are different, the second measured speed value is determined to be different from the second target speed value. Compare the measured speed value and the second limit speed value (S322). The step (S322) of comparing the second measured speed value and the second limit speed value may be performed by the diagnostic unit 4. In the step of comparing the second measured speed value and the second limit speed value (S322), the second measured speed value is equal to the second limit speed value or the second measured speed value is the second limit speed value. If the speed value is determined to be slower than , the step of transmitting the second leakage information (S520) may be performed. In the step of comparing the second measured speed value and the second limit speed value (S322), if the second measured speed value is determined to be a faster speed value than the second limit speed value, the second correction value A step (S420) of acquiring may be performed.

In the step of comparing the second measured speed value and the second limit speed value (S322), if the second measured speed value is determined to be a faster speed value than the second limit speed value, the second actuator The step of diagnosing whether there is a leak of the supplied working fluid (S320) may include a step of determining whether the second diagnosis number has reached the second standard number (S323).

The step of determining whether the second diagnosis count reaches the second standard number (S323) is to compare the second diagnosis count with the second standard count to determine whether the second diagnosis count reaches the second standard count. This can be done by determining whether something has been done or not. The second standard number of times may be set in advance by the operator. The second standard number of times may be stored in the storage unit 10. The step (S323) of determining whether the second diagnosis count has reached the second standard count may be performed by the diagnosis unit 4.

If the second diagnosis count is determined to be smaller than the second standard count in the step (S323) of determining whether the second diagnosis count has reached the second standard count, the second correction value is obtained. The step (S420) may be performed. For example, when the second reference number of times is 4, the step of obtaining the second correction value (S420) may be performed until the second diagnosis number of times corresponds to 3 times.

If it is determined that the second diagnosis number has reached the second standard number in the step (S323) of determining whether the second diagnosis number has reached the second standard number, the second leak information is transmitted. Step S520 may be performed. For example, when the second reference number is 4 and the second diagnosis number is 4, the step (S520) of transmitting the second leakage information without obtaining the second correction value can be performed. . Therefore, the failure diagnosis method for an injection molding machine according to the present invention can compensate for the leakage of the working fluid supplied to the second actuator 120 by increasing the flow rate of the working fluid using the second correction value, while By applying a limit to the increase in fluid flow rate, an increase in the amount of waste of working fluid can be prevented.

Here, the step of transmitting the second leakage information (S520) may include the following configuration.

First, the second leakage information is acquired. The step of acquiring the second leakage information may be accomplished by obtaining second leakage information about the second pipe 420 connecting the second actuator 120 and the hydraulic device 400. The step of acquiring the second leak information may be performed by the transmission unit 6. The second leakage information may include a difference between the second measured speed value and the second target speed value, the second diagnosis count, the second correction value, etc. The step of acquiring the second leakage information is performed when the second measured speed value is different from the second target speed value and is the same as the second limit speed value, or when the second limit speed value is a slower speed value. It can be. Even if the second measured speed value is different from the second target speed value and is a speed value faster than the second limit speed value, the step of acquiring the second leakage information is performed when the second diagnosis count is the second limit speed value. 2Can be performed when the standard number of times is reached.

Next, the difference between the second measured speed value and the second limit speed value is compared with the reference value. The step of comparing the difference value with the reference value may be performed by the transmission unit 6.

Next, in the step of comparing the difference value with the reference value, if the difference value is determined to be less than the reference value, the second leakage information is transmitted to the first terminal. Accordingly, the operation manager can check the second leakage information through the first terminal. The step of transmitting the second leakage information to the first terminal may be performed by the transmission unit 6.

Next, in the step of comparing the difference value with the reference value, if the difference value is determined to be greater than the reference value, the second leakage information is transmitted to the second terminal. Accordingly, the repair person can check the second leakage information through the second terminal. The step of transmitting the second leakage information to the second terminal may be performed by the transmission unit 6. The step of transmitting the second leakage information to the second terminal may include transmitting the second leakage information to the first terminal in addition to transmitting the second leakage information to the second terminal.

Referring to FIGS. 1 to 9 , when the hydraulic device 400 supplies working fluid to the third actuator 130, the failure diagnosis method for an injection molding machine according to the present invention can be implemented as follows.

First, the rotation command value providing step (S100) may include providing a third rotation command value (S130). The step of providing the third rotation command value (S130) involves providing the third rotation command to the hydraulic device 400 so that the working fluid is supplied to the third actuator 130 among the actuators of the injection molding machine 100. This can be done by providing a value. The step of providing the third rotation command value (S130) may be performed by the providing unit 2. For example, the third actuator 130 may be the injection port 240. In this case, the third actuator 130 may be connected to the hydraulic device 400 through the third pipe 430. A third opening/closing valve 431 is installed in the third pipe 430.

Next, the speed value acquisition step (S200) may include a third speed value acquisition step (S230). The step of acquiring the third speed value (S230) may be performed by acquiring the third measured speed value, the third target speed value, and the third limit speed value. The step of acquiring the third speed value (S230) may be performed by the acquisition unit 3. The acquisition unit 3 may obtain the third measurement speed value by receiving the measurement value measured by the third measurement device 160. The acquisition unit 3 may obtain the third target speed value by extracting the third target speed value corresponding to the third rotation command value from the storage unit 10. The acquisition unit 3 may obtain the third limit speed value by extracting the third limit speed value corresponding to the third rotation command value from the storage unit 10. The acquisition unit 3 may obtain the third limit speed value by extracting the third limit speed value through calculation on the third target speed value corresponding to the third rotation command value.

Next, the leakage diagnosis step (S300) may include a step (S330) of diagnosing the leakage of the working fluid supplied to the third actuator. The step (S330) of diagnosing leakage of the working fluid supplied to the third actuator uses the third rotation command value, the third measured speed value, the third target speed value, and the third limit speed value. This can be done by diagnosing whether there is a leak of the working fluid supplied from the hydraulic device 400 to the third actuator 130. In the step (S330) of diagnosing whether there is a leak of the working fluid supplied to the third actuator, the third measured speed value obtained according to the third rotation command value and the third target speed value are compared, and the third This can be achieved by comparing the third measured speed value obtained according to the rotation command value and the third limit speed value. The step (S330) of diagnosing whether there is a leak of the working fluid supplied to the third actuator may be performed by the diagnosis unit 4.

Next, the correction value acquisition step (S400) may include a third correction value acquisition step (S430). The step of obtaining the third correction value (S430) determines whether the working fluid to be supplied to the third actuator 130 is determined according to the result of the step of diagnosing whether there is a leak of the working fluid supplied to the third actuator (S330). This can be achieved by obtaining a third correction value for the third rotation command value so that the flow rate increases. In the step of diagnosing whether there is a leak of the working fluid supplied to the third actuator (S330), the third actuator 130 determines that the third measured speed value is different from the third target speed value and the third limit speed value. If it is diagnosed as showing a faster speed value compared to This can be achieved by obtaining a third correction value. The step of obtaining the third correction value (S430) may be performed by the correction unit 5. After the third correction value is obtained through the step of acquiring the third correction value (S430), the third rotation command value is the third correction value in the step of providing the third rotation command value (S130). It can be determined by reflecting the value.

As described above, the fault diagnosis method for an injection molding machine according to the present invention is to detect the third actuator using the third rotation command value, the third measured speed value, the third target speed value, and the third limit speed value. It is implemented to diagnose whether a leak of the working fluid supplied to (130) has occurred. Accordingly, the failure diagnosis method for an injection molding machine according to the present invention can confirm whether leakage of the working fluid has occurred before a failure occurs in the third actuator 130, so that the failure of the third actuator 130 The time taken for maintenance work can be shortened when compared to performing maintenance work after this has occurred.

In addition, the failure diagnosis method for an injection molding machine according to the present invention determines the third correction value using the third rotation command value, the third measurement speed value, the third target speed value, and the third limit speed value. By obtaining this, the flow rate of the working fluid supplied to the third actuator 130 is increased to compensate for the leakage of the working fluid. Accordingly, the failure diagnosis method for an injection molding machine according to the present invention uses the third correction value compared to performing maintenance work whenever a leak of the working fluid supplied to the third actuator 130 occurs. By compensating for leakage of the working fluid supplied to the third actuator 130, the number of times maintenance work is performed can be reduced. In addition, the failure diagnosis method for an injection molding machine according to the present invention uses the third correction value to adjust the operating speed of the third actuator 130 even if there is a leak of the working fluid supplied to the third actuator 130. Since the fluid can be maintained approximately as it was before the leak occurred, it can contribute to maintaining the quality of the injection product even when the working fluid supplied to the third actuator 130 leaks.

Next, the leakage information transmission step (S500) may include a step of transmitting third leakage information (S530).

The step of transmitting the third leak information (S530) is to determine whether the third actuator 130 and the hydraulic device ( This can be achieved by transmitting third leakage information about the third pipe 430 connecting 400). In the step of diagnosing whether there is a leak of the working fluid supplied to the third actuator (S330), the third actuator 130 determines that the third measured speed value is different from the third target speed value and the third measured speed If it is diagnosed that the value represents a speed value that is the same as or slower than the third limit speed value, the step of transmitting the third leakage information (S530) can be performed by transmitting the third leakage information. The step of transmitting the third leakage information (S530) may be performed by the transmission unit 6. The third leak information may be provided to at least one of the first terminal and the second terminal.

Accordingly, the failure diagnosis method for an injection molding machine according to the present invention can provide the third leakage information to at least one of the operation person and the repair person, so that at least one of the operation person and the repair person is the injection molding machine 100. It is implemented so that the leakage state of the working fluid supplied to the third actuator 130 can be confirmed through the third leakage information without going to the installation location. Therefore, the failure diagnosis method for an injection molding machine according to the present invention performs maintenance and repair on the third actuator 130, the third pipe 430, and the third open/close valve 431 using the third leakage information. It can contribute to shortening the time it takes to perform a task.

In the step of transmitting the third leakage information (S530), the first diagnosis count and the first correction value up to the time when the third leakage information is acquired may also be transmitted. Accordingly, the failure diagnosis method for an injection molding machine according to the present invention is implemented to transmit the first leakage information together in the process of transmitting the third leakage information. Therefore, the failure diagnosis method for an injection molding machine according to the present invention is implemented to check the leakage state of the working fluid supplied to the third actuator 130 and the leakage state of the working fluid supplied to the first actuator 110. , the ease and accuracy of maintenance work can be improved. In the step of transmitting the third leakage information (S530), the second diagnosis count and the second correction value up to the time the third leakage information is acquired may also be transmitted. The step of transmitting the third leakage information (S530) includes the first diagnosis count, the first correction value, the second diagnosis count, and the second correction value up to the time the third leakage information was acquired. You can also send it.

Here, the step (S330) of diagnosing whether there is a leak of the working fluid supplied to the third actuator may include the following configuration.

First, it is determined whether the third measured speed value and the third target speed value match (S331). The step S331 of determining whether the third measured speed value matches the third target speed value may be performed by the diagnosis unit 4. The step of determining whether the third measured speed value and the third target speed value match (S331) is performed when the difference between the third measured speed value and the third target speed value is within a preset third reference range. It may be determined that the third measured speed value and the third target speed value match. The third standard range can be set in advance by the operator. The third reference range may be stored in the storage unit 10. If the difference between the third measured speed value and the third target speed value is within the third reference range, the step of providing the third rotation command value may be performed again from step S130. The step of determining whether the third measured speed value and the third target speed value match (S331) is performed when the difference value between the third measured speed value and the third target speed value is outside the third reference range. It may be determined that the third measured speed value and the third target speed value are different.

Next, in the step of determining whether the third measured speed value and the third target speed value match (S331), if it is determined that the third measured speed value and the third target speed value are different, the third measured speed value is determined to be different from the third target speed value. Compare the measured speed value and the third limit speed value (S332). The step S332 of comparing the third measured speed value and the third limit speed value may be performed by the diagnostic unit 4. In the step of comparing the third measured speed value and the third limit speed value (S332), the third measured speed value is equal to the third limit speed value or the third measured speed value is the third limit speed value. If the speed value is determined to be slower than , the step of transmitting the third leakage information (S530) may be performed. In the step of comparing the third measured speed value and the third limit speed value (S332), if the third measured speed value is determined to be a faster speed value than the third limit speed value, the third correction value A step (S430) of acquiring may be performed.

In the step of comparing the third measured speed value and the third limit speed value (S332), if the third measured speed value is determined to be a faster speed value than the third limit speed value, the third actuator The step of diagnosing whether there is a leak of the supplied working fluid (S330) may include a step of determining whether the third diagnosis number has reached the third standard number (S323).

The step of determining whether the third diagnosis count has reached the third standard count (S333) is to compare the third diagnosis count with the third standard count to determine whether the third diagnosis count has reached the third standard count. This can be done by determining whether something has been done or not. The third standard number of times may be set in advance by the operator. The third standard number of times may be stored in the storage unit 10. The step (S333) of determining whether the third diagnosis count has reached the third standard count may be performed by the diagnosis unit 4.

If the third diagnosis count is determined to be smaller than the third standard count in the step (S333) of determining whether the third diagnosis count has reached the third standard count, the third correction value is obtained. The step (S430) may be performed. For example, when the third reference number of times is 4, the step of obtaining the third correction value (S430) may be performed until the third diagnosis number of times corresponds to 3 times.

If it is determined that the third diagnosis number has reached the third standard number in the step of determining whether the third diagnosis number has reached the third standard number (S333), transmitting the third leak information Step S530 may be performed. For example, when the third reference number is 4, when the third diagnosis number is 4, the third correction value is no longer obtained and the third leakage information is transmitted (S530). . Therefore, the failure diagnosis method for an injection molding machine according to the present invention can compensate for the leakage of the working fluid supplied to the third actuator 130 by increasing the flow rate of the working fluid using the third correction value, while By applying a limit to the increase in fluid flow rate, an increase in the amount of waste of working fluid can be prevented.

Here, the step of transmitting the third leakage information (S530) may include the following configuration.

First, the third leak information is obtained. The step of acquiring the third leakage information may be accomplished by acquiring third leakage information about the third pipe 430 connecting the third actuator 130 and the hydraulic device 400. The step of acquiring the third leak information may be performed by the transmission unit 6. The third leakage information may include a difference between the third measured speed value and the third target speed value, the third diagnosis count, and the third correction value. The step of acquiring the third leakage information is performed when the third measured speed value is different from the third target speed value and is the same as the third limit speed value, or when the third limit speed value is a slower speed value. It can be. Even if the third measured speed value is different from the third target speed value and is a speed value faster than the third limit speed value, the step of acquiring the third leakage information is performed when the third diagnosis count is the third limit speed value. 3 It can be performed when the standard number of times is reached.

Next, the difference between the third measured speed value and the third limit speed value is compared with the reference value. The step of comparing the difference value with the reference value may be performed by the transmission unit 6.

Next, in the step of comparing the difference value with the reference value, if the difference value is determined to be less than the reference value, the third leakage information is transmitted to the first terminal. Accordingly, the operation manager can check the third leak information through the first terminal. The step of transmitting the third leak information to the first terminal may be performed by the transmission unit 6.

Next, in the step of comparing the difference value with the reference value, if the difference value is determined to be greater than the reference value, the third leakage information is transmitted to the second terminal. Accordingly, the repair person can check the third leakage information through the second terminal. The step of transmitting the third leakage information to the second terminal may be performed by the transmission unit 6. The step of transmitting the third leakage information to the second terminal may include transmitting the third leakage information to the first terminal in addition to transmitting the third leakage information to the second terminal.

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and it is common in the technical field to which the present invention pertains that various substitutions, modifications, and changes are possible without departing from the technical spirit of the present invention. It will be clear to those who have the knowledge of.

1: Failure diagnosis device for injection molding machine 2: Provided
3: Acquisition Department 4: Diagnosis Department
5: Correction unit 6: Transmission unit
100: injection molding machine 200: injection device
300: Clamping device 400: Hydraulic device

Claims (10)

The hydraulic device 400, which supplies working fluid to each of the N actuators (N is an integer greater than 1) of the injection molding machine 100, supplies the working fluid to the first actuator 110 among the actuators. Providing a first rotation command value to the device 400 (S110);
As the first rotation command value is provided, the operating speed at which the first actuator 110 operates with the working fluid supplied by the hydraulic device 400 is measured to obtain a first measured speed value, and the first rotation The operating speed at which the first actuator 110 should operate according to the command value is extracted to obtain a first target speed value, and the first actuator 110 requires repair or replacement according to the first rotation command value. extracting the operating speed in case of abnormal operation to obtain a first limit speed value (S210);
Working fluid supplied from the hydraulic device 400 to the first actuator 110 using the first rotation command value, the first measured speed value, the first target speed value, and the first limit speed value. Diagnosing whether there is a leak (S310);
If the first measured speed value is different from the first target speed value and is a faster speed value than the first limit speed value, the first actuator 110 is adjusted to increase the flow rate of the working fluid to be supplied to the first actuator 110. Obtaining a first correction value for the rotation command value (S410); and
If the first measured speed value is different from the first target speed value and is the same as the first limit speed value or is a speed value that is slower than the first limit speed value, the first actuator 110 and the hydraulic pressure Obtaining first leakage information about the first pipe 410 connecting the device 400 (S511)
A fault diagnosis method for an injection molding machine including. According to paragraph 1,
If the difference between the first measured speed value and the first limit speed value is less than or equal to a preset reference value, the first leakage information is transmitted to the first terminal pre-registered as that of the operation manager for the injection molding machine 100. Step (S513); and
If the difference value between the first measured speed value and the first limit speed value is greater than the reference value, the first leakage information is transmitted to the second terminal already registered as the repair person for the injection molding machine 100. A fault diagnosis method for an injection molding machine, comprising the step (S514). According to paragraph 1,
A failure diagnosis method for an injection molding machine, characterized in that in the step of providing the first rotation command value, the first rotation command value is determined by reflecting the first correction value obtained in the step of acquiring the first correction value. According to paragraph 1,
The step of diagnosing whether there is a leak of the working fluid supplied to the first actuator 110 includes determining whether the first measured speed value and the first target speed value match (S311),
The step of determining whether the first measured speed value and the first target speed value match (S311) is performed when the difference between the first measured speed value and the first target speed value is within a first preset reference range. It is determined that the first measured speed value and the first target speed value match, and if the difference between the first measured speed value and the first target speed value is outside the first reference range, the first measured speed value is determined to be the same. A fault diagnosis method for an injection molding machine, characterized in that it is determined that the value and the first target speed value are different. According to paragraph 1,
If the first measured speed value is different from the first target speed value and is the same as the first limit speed value or is a speed value that is slower than the first limit speed value, the first actuator 110 and the hydraulic pressure It includes a step (S510) of transmitting the first leakage information about the first pipe 410 connecting the device 400,
In the step (S310) of diagnosing whether there is a leak of the working fluid supplied to the first actuator 110, the first measured speed value is different from the first target speed value and is faster than the first limit speed value. It includes a step (S312) of determining whether the first diagnosis count diagnosed as a value has reached a preset first reference count,
In the step of transmitting the first leak information (S510), the first leak information about the first pipe 410 is transmitted when the first diagnosis number reaches the first reference number. Fault diagnosis method for use. According to clause 5,
A failure diagnosis method for an injection molding machine, characterized in that the step of obtaining the first correction value (S410) is performed only when the first diagnosis number is smaller than the first reference number. According to paragraph 1,
providing a second rotation command value to the hydraulic device 400 to supply working fluid to the second actuator 120 among the actuators (S120);
As the second rotation command value is provided, the operating speed at which the second actuator 120 operates with the working fluid supplied by the hydraulic device 400 is measured to obtain a second measured speed value, and the second rotation The operating speed at which the second actuator 120 should operate according to the command value is extracted to obtain a second target speed value, and the second actuator 120 requires repair or replacement according to the second rotation command value. extracting the operating speed in case of abnormal operation to obtain a second limit speed value (S220);
Working fluid supplied from the hydraulic device 400 to the second actuator 120 using the second rotation command value, the second measured speed value, the second target speed value, and the second limit speed value. Diagnosing whether there is a leak (S320); and
If the second measured speed value is different from the second target speed value and is a speed value faster than the second limit speed value, the second actuator 120 is adjusted to increase the flow rate of the working fluid to be supplied to the second actuator 120. A fault diagnosis method for an injection molding machine, comprising the step of obtaining a second correction value for the rotation command value (S420). In clause 7,
When the second measured speed value is a slower speed value than the second limit speed value, the second leakage in the second pipe 420 connecting the second actuator 120 and the hydraulic device 400 Including a step of transmitting information (S520),
In the step of transmitting the second leakage information (S520), the first measured speed value is different from the first target speed value and is faster than the first limit speed value until the time the second leakage information is acquired. A fault diagnosis method for an injection molding machine, characterized in that the first diagnosis count diagnosed as a value and the first correction value obtained through the step of acquiring the first correction value are transmitted together. The hydraulic device 400, which supplies working fluid to each of the N actuators (N is an integer greater than 1) of the injection molding machine 100, supplies the working fluid to the first actuator 110 among the actuators. A provision unit 2 that provides a first rotation command value to the device 400;
As the first rotation command value is provided, the operating speed at which the first actuator 110 operates with the working fluid supplied by the hydraulic device 400 is measured to obtain a first measured speed value, and the first rotation The operating speed at which the first actuator 110 should operate according to the command value is extracted to obtain a first target speed value, and the first actuator 110 requires repair or replacement according to the first rotation command value. an acquisition unit (3) that extracts the operating speed in case of abnormal operation and obtains a first limit speed value;
a diagnostic unit (4) that compares the first measured speed value and the first target speed value and compares the first measured speed value and the first limit speed value;
If the first measured speed value is different from the first target speed value and is a faster speed value than the first limit speed value, the first actuator 110 is adjusted to increase the flow rate of the working fluid to be supplied to the first actuator 110. A correction unit (5) that obtains a first correction value for the rotation command value; and
When the first measured speed value is different from the first target speed value and is a speed value that is slower than the first limit speed value, the first pipe connecting the first actuator 110 and the hydraulic device 400 Transmission unit 6 for transmitting the first leakage information to (410)
A fault diagnosis device for an injection molding machine including a. delete

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