Injection molding machine

Abstract

To suppress decrease in processing efficiency even if one of multiple power supply means fails.SOLUTION: When either a first amplifier 171 or a second amplifier 172 fails, a control device 145 executes a predetermined process by supplying power to a first motor 161 by the amplifier that is not faulty.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present disclosure relates to an injection molding machine. [Background technology]

[0002] For example, JP 2021-74917 A (Patent Document 1) discloses an injection molding machine. This injection molding machine includes a cylinder, a screw, a ball screw, a motor, and an amplifier. The screw is disposed inside the cylinder and injects the resin contained in the cylinder. The ball screw is connected to the screw and drives the screw. The motor supplies a driving force to the ball screw. The amplifier supplies power to the motor. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-74917 Summary of the Invention [Problem to be solved by the invention]

[0004] In the following, the amplifier will be described as an example of a power supply means. In the above-mentioned injection molding machine, a configuration in which a plurality of power supply means supply power to the motor is conceivable. In such a configuration, one of the plurality of power supply means may fail. In a conventional injection molding machine, in such a case, all processing must be stopped, which may cause a problem of reduced processing efficiency.

[0005] The present invention has been made to solve such problems, and its purpose is to suppress a decrease in processing efficiency in an injection molding machine equipped with multiple power supply means which supply power to at least one driving means, even if one of the multiple power supply means fails. [Means for solving the problem]

[0006] In the injection molding machine according to the present disclosure, when any of the multiple power supply means fails, the remaining power supply means among the multiple power supply means supplies power to at least one drive means, thereby executing a predetermined process. Effect of the Invention

[0007] According to the present disclosure, even if any one of a plurality of power supply means fails, it is possible to suppress a decrease in processing efficiency. [Brief description of the drawings]

[0008] [Figure 1] FIG. 2 is a diagram for explaining a configuration of an injection molding machine. [Diagram 2] 4A to 4C are diagrams for explaining a first operating mechanism, a second operating mechanism, etc. FIG. [Diagram 3] 4 is a flowchart showing a process flow of the control device. [Figure 4] 10A and 10B are diagrams for explaining other failure patterns of the first operating mechanism and the second operating mechanism. [Diagram 5] FIG. 1 is a diagram for explaining several examples of the present embodiment. [Figure 6] FIG. 13 is a diagram for explaining another target mechanism. [Figure 7] 11A to 11C are diagrams for explaining a first operating mechanism and a second operating mechanism according to another embodiment. [Figure 8] 10 is a flowchart showing a process flow of a control device according to another embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are designated by the same reference characters and the description thereof will not be repeated.

[0010] First Embodiment [Injection molding machine configuration] FIG. 1 is a diagram for explaining the configuration of an injection molding machine 100. For convenience of explanation, in FIG. 1, the floor surface on which the injection molding machine 100 is placed is defined as an XY plane, and the direction perpendicular to the floor surface is defined as a Z-axis direction. The positive direction of the Z-axis may be referred to as the upper side or upward, and the negative direction as the lower side or downward. Although the injection molding machine 100 is shown as a horizontal injection molding machine, it is not limited to the horizontal type and may be a vertical injection molding machine.

[0011] The injection molding machine 100 includes a clamping unit 110 for clamping a mold, an injection unit 120 for melting and injecting an injection material, an operation panel 130, and a command unit 140. In Fig. 1, the clamping unit 110 is disposed on the negative side of the X-axis with respect to the injection unit 120.

[0012] The mold clamping device 110 includes a bed 111, a fixed platen 112, a mold clamping housing 113, a movable platen 114, tie bars 115, a mold clamping mechanism 116, a pair of molds 117 and 118, and a ball screw 119. The bed 111 is placed on the floor surface, and devices such as the fixed platen 112, the mold clamping housing 113, and the movable platen 114 are mounted on the upper surface of the bed 111.

[0013] The fixed platen 112 is fixed to the end of the bed 111 closer to the injection unit 120 (i.e., in the positive direction of the X-axis). The mold clamping housing 113 is disposed at the end of the bed 111 in the negative direction of the X-axis. The fixed platen 112 and the mold clamping housing 113 are connected by a tie bar 115 including a plurality of bars. The mold clamping housing 113 is movable on the bed 111 in the X-axis direction.

[0014] The movable platen 114 is disposed on the bed 111 between the fixed platen 112 and the clamping housing 113. The movable platen 114 is configured to be movable in the X-axis direction. The clamping housing 113 and the movable platen 114 are connected by a clamping mechanism 116. The clamping mechanism 116 has a toggle mechanism. A ball screw 119 is connected to the toggle mechanism, and the movable platen 114 can be moved in the X-axis direction relative to the clamping housing 113 by driving a servo motor 151 disposed in the clamping housing 113 to rotate the ball screw 119. Note that a direct acting cylinder driven by hydraulic pressure may be used as the clamping mechanism 116.

[0015] The molds 117 and 118 are disposed on the movable platen 114 and the fixed platen 112, respectively. The molds 117 and 118 are disposed between the movable platen 114 and the fixed platen 112, facing each other. By moving the mold 117 in the X-axis direction using the mold clamping mechanism 116, the mold 117 and the mold 118 can be brought into close contact with each other, or the mold 117 can be separated from the mold 118. In the following description, the process of moving the molds 117 and 118 from a separated state to a close contact state is referred to as "mold clamping". Also, the process of moving the molds 117 and 118 from a close contact state to a separated state is referred to as "mold opening". Also, the state in which the molds 117 and 118 are in close contact with each other corresponds to the "closed state" of this disclosure, and the state in which the molds 117 and 118 are separated corresponds to the "open state" of this disclosure.

[0016] With the mold 117 and the mold 118 in close contact with each other in the mold clamping process, the inside of the mold is filled with molten material (resin), which is then cooled and solidified, thereby molding a product (molded product) of a desired shape. After the product is molded, with the mold 117 separated from the mold 118 in the mold opening process, the molded product can be removed from the mold 117 by operating the ejection mechanism 129 arranged on the movable platen 114. The ejection mechanism 129 is driven by a servo motor 152 arranged on the movable platen 114. The process of removing the product using the ejection mechanism 129 is referred to as the "ejection" process. The ejection mechanism 129 is also referred to as an ejector.

[0017] The injection device 120 includes a base 121, a heating cylinder 122, an actuator 124, a hopper 125, and a temperature sensor 128. The base 121 is disposed on the floor surface on the positive side of the X-axis of the bed 111, and the actuator 124 is mounted on the upper surface thereof. A first motor 161, a second motor 162, a third motor 163, and the like are disposed in the actuator 124. The first motor 161 and the second motor 162 are motors for injection. The third motor 163 is a motor for plasticization.

[0018] The motor corresponds to the “drive means” of the present disclosure. The injection molding machine 100 includes at least one drive means, and the at least one drive means is a servo motor 151, a servo motor 152, a first motor 161, a second motor 162, and a third motor 163.

[0019] A heating cylinder 122 extending in the X-axis direction is disposed in the actuation device 124. Resin is accommodated in the heating cylinder 122. The heating cylinder 122 includes a heater (not shown) for heating the inside, a screw 123, and an injection nozzle 126.

[0020] The screw 123 is driven by a third motor 163 in the actuator 124, and configured to be rotatable about an X-axis direction as a rotation axis. One end of the screw 123 is coupled to a ball screw 164. The ball screw 164 is rotationally driven by a first motor 161 and a second motor 162. The screw 123 is configured to be movable in the X-axis direction by the rotation of the ball screw 164. The X-axis direction corresponds to the "predetermined direction" in the present disclosure. At least one of the screw 123 and the ball screw 164 is an example of the "target mechanism" in the present disclosure. In the present embodiment, the screw 123 is an example of the "target mechanism".

[0021] The injection nozzle 126 is disposed at the end of the heating cylinder 122 on the mold clamping device 110 side (i.e., the end in the negative direction of the X-axis). Bead-like resin material α is charged into the hopper 125. The heating cylinder 122 heats and melts the resin material α, and kneads it using a screw 123 to generate a molten material. This process of melting the resin material is referred to as a "plasticization" process.

[0022] As described later, the screw 123 is moved in the X-axis direction by the actuator 124, whereby the injection molding machine 100 brings the injection nozzle 126 into contact with the sprue bush of the mold 118 in the mold clamping device 110. The injection molding machine 100 then injects the molten material from the injection nozzle 126, thereby filling the cavities of the molds 117, 118 with the molten material. In this manner, the nozzle touch mechanism is realized. The first motor 161 and the second motor 162 apply pressure to the molten material by moving the screw 123 in the heating cylinder 122 in the negative direction of the X-axis, thereby injecting the molten material into the molds 117, 118 and maintaining the pressure of the molten material constant after injection.

[0023] The process of injecting the molten material into the molds 117, 118 is referred to as an "injection" process. After the injection process, the process of cooling the molten material filled in the molds 117, 118 while maintaining a constant pressure is referred to as a "pressure holding" process.

[0024] The temperature sensor 128 is disposed near the injection nozzle 126 of the heating cylinder 122. The temperature sensor 128 detects the temperature of the molten material inside the heating cylinder 122 and outputs the temperature to the command device 140. The command device 140 controls the heater based on the detection value of the temperature sensor 128 to adjust the temperature of the molten material to a desired temperature.

[0025] Once the dwell step is completed, the mold opening and ejection steps are carried out to remove the molded product.

[0026] The injection molding machine 100 can continuously form products by cyclically repeating a mold clamping process, an injection process, a pressure holding process, a plasticizing process, a mold opening process, and an ejection process. In this embodiment, the mold clamping process, the injection process, the pressure holding process, the plasticizing process, the mold opening process, and the ejection process are collectively referred to as a "molding cycle."

[0027] The command device 140 is stored inside the base 121. The command device 140 includes a CPU (Central Processing Unit) 141, a memory 142, and a servo amplifier group 17 for driving each motor. The CPU 141 and the memory 142 configure a control device 145. The servo amplifier group 17 is configured by a plurality of servo amplifiers. The servo amplifiers are also simply referred to as "amplifiers", and the amplifiers correspond to the "power supply means" of this disclosure.

[0028] The plurality of servo amplifiers (power supply means) include a first amplifier 171, a second amplifier 172, a third amplifier 173, and a fourth amplifier 174 in Fig. 2 described below. The first amplifier 171, the second amplifier 172, the third amplifier 173, and the fourth amplifier 174 correspond to the "first power supply means", the "second power supply means", the "third power supply means", and the "fourth power supply means" of the present disclosure, respectively. The command device 140 acquires detection values ​​of various sensors arranged in the injection molding machine 100 and controls the injection molding machine 100 in an integrated manner.

[0029] The operation panel 130 is a device for an operator to operate the injection molding machine 100, and includes a display 132 that displays various images, and an input device such as a keyboard. The operation panel 130 is connected to a command device 140, and can acquire and display the status of the injection molding machine 100, and output a user operation signal from the input device to the command device 140. The operation panel 130 may be a touch panel in which the display 132 and the input device are integrated. The operation panel 130 may be attached to the bed 111 or base 121 of the injection molding machine 100, or may be disposed in a position independent of the injection molding machine 100.

[0030] [Operation mechanism configuration] Fig. 2 is a diagram for explaining the first operating mechanism 181 and the second operating mechanism 182 of the present embodiment. In the following explanation of the first operating mechanism 181 and the second operating mechanism 182, Fig. 2 will be mainly referred to, but Fig. 1 will also be referred to as appropriate.

[0031] The first operating mechanism 181 includes a first amplifier 171, a second amplifier 172, a first motor 161, a first encoder 201, and a first wiring 211. The first amplifier 171 supplies power from a power source (not shown) to the first motor 161. The first encoder 201 corresponds to a "sensor" in this disclosure.

[0032] Additionally, the second amplifier 172, together with the first amplifier 171, supplies power from the power source to the first motor 161. In this manner, the first amplifier 171 and the second amplifier 172 supply power to the first motor 161. Therefore, in the injection molding machine 100 of this embodiment, the maximum power supply amount of the first amplifier 171 and the second amplifier 172 can be reduced, and power supply to the first motor 161 can be stably executed.

[0033] Moreover, the first motor 161 operates (rotates) the ball screw 164. As described in FIG 1, the ball screw 164 rotates, so that the screw 123 moves in the X-axis direction (see FIG 1).

[0034] The first amplifier 171 has a first control board 191. The second amplifier 172 has a second control board 192. The first amplifier 171 and the second amplifier 172 are connected by wiring. The first encoder 201 is a sensor that detects the rotational position of the rotor of the first motor 161. A detection signal indicating the rotational position detected by the first amplifier 171 is transmitted to the first amplifier 171 via a first wiring 211. In addition, the control device 145 transmits a target signal related to the drive of the first motor 161 to the first amplifier 171. The target signal is, for example, a signal indicating a target rotational position of the rotor of the first motor 161.

[0035] The first control board 191 calculates the difference between the rotational position indicated by the detection signal and the rotational position indicated by the target signal. The first control board 191 generates a control signal based on the difference. The first control board 191 transmits the control signal to the second amplifier 172. The first amplifier 171 and the second amplifier 172 execute a predetermined control (for example, PWM control) based on the control signal, thereby executing feedback control of the first motor 161. The feedback control of the first motor 161 is, for example, a process of controlling a control parameter of the first motor 161. The control parameter is, for example, the torque of the first motor 161 or the rotational speed of the first motor 161.

[0036] In this way, the first amplifier 171 generates a control signal by the first control board 191 and drives the first motor 161 based on the control signal. On the other hand, the second amplifier 172 drives the first motor 161 based on the control signal transmitted from the first amplifier 171. Therefore, the first amplifier 171 is also called a "master amplifier" and the second amplifier 172 is also called a "slave amplifier."

[0037] 2, the first wiring 211 is connected to the first amplifier 171. As shown by the broken line A1, the user can switch the connection of the first wiring 211 to the second amplifier 172. By switching the connection of the first wiring 211 to the second amplifier 172, the detection signal from the first encoder 201 is input to the second amplifier 172. The second control board 192 of the second amplifier 172 calculates the difference between the rotation position indicated by the detection signal from the first encoder 201 and the rotation position indicated by the target signal from the control device 145. The second control board 192 generates a control signal based on the difference. Then, the second control board 192 executes a predetermined control (for example, PWM control) based on the control signal, thereby executing feedback control of the first motor 161. In other words, by switching the connection of the first wiring 211 to the second amplifier 172, the second control board 192 can execute feedback control of the first motor 161.

[0038] The second operating mechanism 182 includes a third amplifier 173, a fourth amplifier 174, a second motor 162, a second encoder 202, and a second wiring 212. The third amplifier 173 includes a third control board 193. The fourth amplifier 174 includes a fourth control board 194.

[0039] The third amplifier 173, the fourth amplifier 174, the second motor 162, the second encoder 202, the second wiring 212, the third control board 193, and the fourth control board 194 have the same functions as the first amplifier 171, the second amplifier 172, the first motor 161, the first encoder 201, the first wiring 211, the first control board 191, and the second control board 192, respectively. Therefore, the description of the third amplifier 173, the fourth amplifier 174, the second motor 162, the second encoder 202, the second wiring 212, the third control board 193, and the fourth control board 194 will be omitted. Note that the third amplifier 173 is a master amplifier, and the fourth amplifier 174 is a slave amplifier.

[0040] 2, the second wiring 212 is connected to the third amplifier 173. As indicated by the dashed line A2, the user can switch the connection of the second wiring 212 to the fourth amplifier 174. By switching the connection of the second wiring 212 to the fourth amplifier 174, the detection signal from the second encoder 202 is input to the fourth amplifier 174.

[0041] The first motor 161 generates a first driving force for driving the ball screw 164. The second motor 162 generates a second driving force for driving the ball screw 164. Therefore, in the injection molding machine 100 of this embodiment, the driving forces generated by the first motor 161 and the second motor 162 can be reduced, and the operation of the ball screw 164 can be stably executed.

[0042] The control device 145 detects failures of the first operating mechanism 181 and the second operating mechanism 182 by monitoring the first operating mechanism 181 and the second operating mechanism 182. The failure of the first operating mechanism 181 includes at least one of the failure of the first motor 161, the failure of the first amplifier 171, and the failure of the second amplifier 172, and the failure of the second operating mechanism 182 includes at least one of the failure of the second motor 162, the failure of the third amplifier 173, and the failure of the fourth amplifier 174. By such monitoring, the control device 145 can detect failures of the first amplifier 171, the second amplifier 172, the third amplifier 173, the fourth amplifier 174, the first motor 161, and the second motor 162. Here, it is assumed that the failure of the master amplifier is mainly a failure of the control board.

[0043] As an example of a method for detecting a failure of an amplifier (first amplifier 171, second amplifier 172, third amplifier 173, fourth amplifier 174), for example, the control device 145 acquires amplifier information for detecting a failure of the amplifier. The amplifier information is, for example, an output value from the amplifier, and the output value is, for example, a power value. Then, when the output value falls within a predetermined abnormal range, the control device 145 determines that the amplifier that output the output value has failed.

[0044] As an example of a method for detecting a failure of the motors (first motor 161, second motor 162), for example, the control device 145 acquires motor information for detecting a failure of the motor. The motor information is, for example, a vibration value. Then, when the vibration value falls within a predetermined abnormal range, the control device 145 determines that the motor that output the vibration value has failed.

[0045] [Control device processing flow] Fig. 3 is a flowchart showing the flow of processing by the control device 145 (injection molding machine 100). In the following description of the flow of processing by the control device 145, Fig. 3 will be mainly referred to, but Figs. 1 and 2 will also be referred to as appropriate.

[0046] First, in step S2, the control device 145 determines whether or not a failure has been detected in the first operating mechanism 181 and the second operating mechanism 182. If the control device 145 has not detected a failure in the first operating mechanism 181 and the second operating mechanism 182 in step S2 (NO in step S2), the processing in Fig. 3 ends. If the control device 145 has detected a failure in step S2 (YES in step S2), the processing proceeds to step S4.

[0047] In step S4, the control device 145 identifies the location of the failure. Specifically, as described in FIG. 2, the control device 145 identifies any one of a failure of the first amplifier 171, a failure of the second amplifier 172, a failure of the third amplifier 173, a failure of the fourth amplifier 174, a failure of the first motor 161, and a failure of the second motor 162. The identification is performed using the above-mentioned amplifier information and motor information. Here, a case will be described in which any one of a failure of the first amplifier 171, a failure of the second amplifier 172, a failure of the third amplifier 173, a failure of the fourth amplifier 174, a failure of the first motor 161, and a failure of the second motor 162 occurs.

[0048] Next, in step S6, the control device 145 determines whether or not the master amplifier has failed. The master amplifiers are the first amplifier 171 and the second amplifier 172, as described above. In step S6, if the control device 145 determines that the master amplifier has failed (YES in step S6), the process proceeds to step S8. On the other hand, if the control device 145 determines that the master amplifier has not failed (NO in step S6), the process proceeds to step S16.

[0049] In step S8, the user is notified of a method for repairing the injection molding machine 100 to cause the control device 145 (or the injection molding machine 100) to execute a predetermined process described below. Specifically, the notification is made by displaying a text image corresponding to the notification on the display 132 (see FIG. 1). The notification may also be displayed on the display of a mobile terminal owned by the user.

[0050] In step S8, the control device 145 notifies the user that the wiring will be switched. Here, a case will be described in which the first amplifier 171 serving as the master amplifier has failed. The content of the notification in step S8 is a repair content to switch the connection destination of the first wiring 211 (see FIG. 2) from the first amplifier 171 (master amplifier) ​​to the second amplifier (slave amplifier) ​​(see dashed line A1 in FIG. 2).

[0051] Here, the idea behind the notification in step S8 will be explained. If the first amplifier 171 (master amplifier) ​​fails, the first amplifier 171 cannot execute feedback control of the first motor 161. However, if the second amplifier 172 (slave amplifier) ​​does not fail, the second amplifier 172 has the second control board 192 and therefore has room to execute feedback control of the first motor 161.

[0052] Therefore, in step S8, the control device 145 executes the above-mentioned notification. When a user who has visually recognized such a notification switches the connection destination of the first wiring 211 from the first amplifier 171 to the second amplifier 172, the second amplifier 172 becomes able to execute the feedback control of the first motor 161. The notification in step S8 is also called a "switching notification."

[0053] The notification method in step S8 is, for example, that the control device 145 displays an image of a message corresponding to the above notification on the display 132 (see FIG. 1). The image of the message is, for example, an image saying "Please switch the connection destination of the first wiring 211 from the first amplifier 171 to the second amplifier 172." Furthermore, if the third amplifier 173 fails, the switching notification in step S8 is a notification that the connection destination of the second wiring 212 (see FIG. 2) will be switched from the third amplifier 173 (master amplifier) ​​to the fourth amplifier 174 (slave amplifier).

[0054] Next, in step S10, the control device 145 determines whether the connection destination of the first wiring 211 has been switched to the second amplifier 172. For example, when the connection destination of the first wiring 211 has been switched to the second amplifier 172, the second amplifier 172 outputs a switching completion signal to the control device 145. When the control device 145 receives the switching completion signal, it determines in step S10 that the wiring switching is complete. The control device 145 repeats the process of step S10 until it receives the switching completion signal (NO in step S10). If it is determined YES in step S10, the process proceeds to step S12.

[0055] In step S12, the control device 145 executes 75% drive. Here, the 75% drive will be explained. When the first amplifier 171 and the second amplifier 172 drive the first motor 161, the proportion of power supplied to the first motor 161 is set to 100%. When the first amplifier 171 breaks down and the second amplifier 172 drives the first motor 161, the proportion of power supplied to the first motor 161 is 50%.

[0056] Furthermore, when the first operating mechanism 181 and the second operating mechanism 182 are not broken, the ratio of each of the first driving force and the second driving force shown in Fig. 2 is set to 50%. Then, the control device 145 operates the ball screw 164 with a driving force of 100%, which is the sum of the ratios of the first driving force and the second driving force.

[0057] As described above, when the first amplifier 171 fails and the second amplifier 172 drives the first motor 161, the proportion of power supplied to the first motor 161 is 50%. Therefore, when the first amplifier 171 fails, the proportion of the first driving force becomes half of 50%, that is, 25%. On the other hand, the proportion of the second driving force remains at 50%. Therefore, the first operating mechanism 181 and the second operating mechanism 182 (the first motor 161 and the second motor 162) drive the ball screw 164 with a driving force of 75%. This driving with a driving force of 75% is the "75% driving" in step S12.

[0058] This 75% drive, and the 50% drive and 25% drive described below are also called “low drive.” Low drive is “driving the ball screw 164 with a drive force lower than the drive force when the first operating mechanism 181 and the second operating mechanism 182 are not broken.”

[0059] Next, in step S14, the control device 145 operates the screw 123 at 75% drive (low drive) to execute a purge process corresponding to 75% drive. Here, the purge process is a process for discharging (removing) the remaining resin remaining in the heating cylinder 122 by moving the screw 123 in the X-axis direction. In this purge process, the screw 123 may be rotated or may not be rotated. The process in which the control device 145 causes the injection molding machine 100 to execute the purge process in step S14 corresponds to the "predetermined process" of the present disclosure.

[0060] In addition, in the present disclosure, when the control device 145 executes low drive for the ball screw 164, the injection molding machine 100 does not mold a molded product from the viewpoint of ensuring the quality of the molded product. Then, when the process of step S14 ends, the process of FIG. 3 ends.

[0061] In step S16, the control device 145 determines whether or not the slave amplifier is faulty. If the control device 145 detects a fault in the slave amplifier (YES in step S16), the process proceeds to step S12. If the control device 145 does not detect a fault in the slave amplifier (NO in step S16), the process proceeds to step S18.

[0062] In step S18, the control device 145 determines that a failure has occurred in either of the motors (that is, the first motor 161 or the second motor 162). Here, it is assumed that the first motor 161 has failed.

[0063] Next, in step S20, the control device 145 executes 50% drive. To explain the 50% drive, when the first motor 161 fails, the first operating mechanism 181 (first motor 161) does not generate the first driving force, and only the second operating mechanism 182 (second motor 162) generates a driving force (second driving force). Driving only with this second driving force becomes 50% drive.

[0064] Next, in step S14, the control device 145 executes a purge process corresponding to 50% drive. Here, the difference between the above-mentioned purge process corresponding to 75% drive and the purge process corresponding to 50% drive will be explained. As described above, the purge process is a process for moving the screw 123 in the X-axis direction. Therefore, the purge process corresponding to 75% drive is a purge process in which the torque of the ball screw 164 is greater than that corresponding to 50% drive.

[0065] When the purging process in step S14 is completed, a repairman or the like repairs the broken parts. After the repairs, the injection molding machine 100 then performs normal processing (processing for molding a molded product).

[0066] [Failure pattern] FIG. 4 is a diagram for explaining other failure patterns of the first operating mechanism 181 and the second operating mechanism 182. In the following explanation of the failure patterns, FIG. 3 will be mainly referred to, but also FIGS. 1 to 3 will be referred to as appropriate. In FIG. 4, "failure" indicates that a failure has occurred, and "◯" indicates that driving force or power can be supplied. Furthermore, "△" indicates that the supply of driving force or power is halved, and "×" indicates that driving force or power cannot be supplied. The "output [%]" column in FIG. 4 indicates the ratio of driving force, such as the above-mentioned 75% drive. The blank spaces in FIG. 4 indicate the amplifier corresponding to the failed motor (first motor 161 or second motor 162) due to the failure of the motor.

[0067] For example, the first failure pattern is a failure pattern in which the first motor 161 has failed. In this failure pattern, the control device 145 executes 50% driving. In addition, when a failure occurs in a failure pattern in which the master amplifier has failed, the control device 145 executes the switching notification of step S8.

[0068] For example, when a failure of the sixth failure pattern occurs, the control device 145 executes a switching notification to set the connection destination of the first wiring 211 to the third amplifier 173 and the slave amplifier of the third amplifier 173 to the fourth amplifier 174. Then, after an arbitrary period has elapsed, the control device 145 executes a switching notification to set the connection destination of the second wiring 212 to the third amplifier 173 and the slave amplifier of the third amplifier 173 to the fourth amplifier 174. By repeating such switching notification, it is possible to encourage the user to alternately use the first motor 161 and the second motor 162. Therefore, by alternately using the first motor 161 and the second motor 162, it is possible to extend the lifespan of the first motor 161 and the second motor 162.

[0069] Furthermore, when a failure of the sixth failure pattern occurs, and the first encoder 201 and the first control board 191 of the first amplifier 171 are not faulty, the control device 145 executes a switching notification to switch the connection destination of the first wiring 211 to the fourth amplifier 174. By switching the connection destination of the first wiring 211 to the fourth amplifier 174, the master amplifier of the first motor 161 can be the fourth amplifier 174, and the master amplifier of the second motor 162 can be the third amplifier 173. This allows the control device 145 to drive the ball screw 164 by the first motor 161 and the second motor 162.

[0070] Furthermore, in the event of a failure of the eighth failure pattern, the user can replace the second amplifier 172 with the fourth amplifier 174 to achieve 50% drive.

[0071] [Summary] (1) As described above, the injection molding machine 100 of this embodiment includes at least one driving means (first motor 161 and second motor 162) for driving the target mechanism (screw 123), and a plurality of power supplying means (first amplifier 171 to fourth amplifier 174) for supplying power to the at least one driving means. Therefore, the injection molding machine 100 can stably operate the screw 123 while keeping the power supplying means small in size. Also, there are cases where the power supplying means breaks down. In such a case, in a conventional injection molding machine, all processing must be stopped, which can cause a problem of reduced processing efficiency.

[0072] On the other hand, in the injection molding machine 100 of the present embodiment, even if any of the power supply means (first amplifier 171 to fourth amplifier 174) fails, the non-failed power supply means supplies power to at least one drive means, so that the predetermined process can be executed. Therefore, compared to conventional injection molding machines, even if the power supply means fails, the decrease in process efficiency can be suppressed.

[0073] (2) As shown in FIG. 3 and FIG. 4, when the first power supply means (first amplifier 171) fails, the control device 145 executes a predetermined process by having the second power supply means (second amplifier 172) supply power to the first motor 161. When the second power supply means (second amplifier 172) fails, the first power supply means (first amplifier 171) supplies power to the first motor 161. When the third power supply means (third amplifier 173) fails, the control device 145 executes a predetermined process by having the fourth power supply means (fourth amplifier 174) supply power to the second motor 162. When the fourth power supply means (fourth amplifier 174) fails, the control device 145 executes a predetermined process by having the third power supply means (third amplifier 173) supply power to the second motor 162. Therefore, even if any of the first amplifier 171, the second amplifier 172, the third amplifier 173, and the fourth amplifier 174 fails, the injection molding machine 100 can perform the predetermined process by performing the low driving described above.

[0074] (3) In addition, as shown in Fig. 3, a method for repairing the injection molding machine 100 to cause the control device 145 to execute a predetermined process when the first amplifier 171 (master amplifier) ​​breaks down is notified to the user. The user can make the control device 145 execute the predetermined process by performing the repair indicated by this notification. This improves user convenience.

[0075] 3, when the first amplifier 171 (master amplifier) ​​breaks down (YES in step S6), the control device 145 notifies the user to switch the connection destination of the first wiring 211 from the first amplifier 171 to the second amplifier 172 (slave amplifier) ​​as the above-mentioned repair method (step S8). Therefore, the injection molding machine 100 can urge the user to switch the connection destination of the first wiring 211 so that the second amplifier 172 can drive the first motor 161.

[0076] (4) Furthermore, the target mechanism driven by at least one of the driving means (the first motor 161 and the second motor 162) is the screw 123 (see FIG. 1). Therefore, the injection molding machine 100 can stably operate the screw 123.

[0077] (5) Furthermore, the control device 145 executes a process of causing the injection molding machine 100 to execute a purge process as a predetermined process. Therefore, the injection molding machine 100 can remove the remaining resin remaining in the heating cylinder 122 even if any of the first amplifier 171, the second amplifier 172, the third amplifier 173, and the fourth amplifier 174 breaks down.

[0078] (6) In addition, as described in Fig. 3, when one of the multiple motors (first motor 161, second motor 162) breaks down, a predetermined process is executed by driving the target mechanism with the remaining motor among the multiple motors. Therefore, the injection molding machine 100 can suppress a decrease in processing efficiency even when a motor breaks down.

[0079] <Second embodiment> In the second embodiment, several examples are described in which at least one of the number of ball screws, the number of motors, and the number of amplifiers applied to the screw 123 is different from that in the first embodiment. FIG. 5 is a diagram for explaining the several examples. In the following explanation of the several examples, FIG. 5 will be mainly referred to, but FIGS. 1 to 3 will also be referred to as appropriate. In FIG. 5, "◯" indicates that the above-mentioned low drive is feasible, and "×" indicates that the above-mentioned low drive is not feasible. "None" indicates that there are no parts.

[0080] The first example is an example in which the screw 123 is operated by one ball screw, one motor, and two amplifiers. The first example will be explained with reference to Fig. 2, where an injection molding machine to which the first example is applied is an injection molding machine that has a first operating mechanism 181 but does not have a second operating mechanism 182. In the first example, the first amplifier 171 serves as a first power supply means, and the second amplifier 172 serves as a second power supply means.

[0081] The failure of the first operating mechanism 181 in the first example includes a failure of the first amplifier 171. Furthermore, if the first motor 161 fails, low drive cannot be performed. If the master amplifier (first amplifier 171) fails, the control device 145 executes a switching notification (see step S8 in FIG. 3). Then, if the user completes switching of the first wiring 211, low drive can be executed. Furthermore, the control device 145 can execute low drive even if the slave amplifier (second amplifier 172) fails. Therefore, the injection molding machine 100 to which the first example is applied can execute low drive and predetermined processing even if the first operating mechanism fails.

[0082] The second example is an example in which the screw 123 is operated by one ball screw, two motors, and two amplifiers. The second example will be explained with reference to FIG. 2. The injection molding machine to which the second example is applied is an injection molding machine that does not have the second amplifier 172 and the fourth amplifier 174. In the second example, the first amplifier 171 and the third amplifier 173 are master amplifiers. In the second example, the first amplifier 171 and the first motor 161 are a first operating mechanism, and the third amplifier 173 and the second motor 162 are a second operating mechanism.

[0083] The failure of the first operating mechanism 181 in the second example includes at least one of a failure of the first motor 161 and a failure of the first amplifier 171. The injection molding machine 100 to which the second example is applied can perform low drive and predetermined processing even if any of the first motor 161, the second motor 162, and the master amplifier (the first amplifier 171 and the third amplifier 173) fails.

[0084] The third example is an example in which one ball screw, two motors, and four amplifiers are used to operate the screw 123. In other words, the third example has the same configuration as the above-described first embodiment.

[0085] The fourth example is an example in which the screw 123 is operated by two ball screws, two motors, and four amplifiers. In this fourth example, the injection molding machine 100 includes two target mechanisms (here, ball screws). The fourth example will be described with reference to FIG. 2. The injection molding machine 100 to which the fourth example is applied has a first ball screw 164A and a second ball screw 164B as the ball screw 164, as shown in parentheses in FIG. 2. The first ball screw 164A corresponds to the "first target mechanism" of the present disclosure, and the second ball screw 164B corresponds to the "second target mechanism" of the present disclosure. The first operating mechanism 181 operates the first ball screw 164A, and the second operating mechanism 182 operates the second ball screw 164B.

[0086] The failure of the first operating mechanism 181 in the fourth example includes at least one of the failure of the first motor 161, the failure of the first amplifier 171, and the failure of the second amplifier 172. In addition, in the fourth example, two ball screws (the first ball screw 164A and the second ball screw 164B) operate one screw 123 with the same driving force. Therefore, the injection molding machine 100 does not operate the screw 123 when either the first ball screw 164A or the second ball screw 164B cannot operate. That is, in the fourth example, when the first motor 161 or the second motor 162 fails, the low drive is not performed. Also, when the master amplifier (the first amplifier 171) fails, the control device 145 executes a switching notification (see step S8 in FIG. 3). Then, when the user completes the switching of the first wiring 211, the low drive can be executed.

[0087] Also, the number of motors in the first, third and fourth examples may be two or more. Also, the number of amplifiers in the first to fourth examples may be two or more, two or more, four or more and four or more, respectively. Also, multiple amplifiers may supply power to multiple motors. For example, three amplifiers may supply power to two motors. Also, the number of target mechanisms (ball screws in the example of FIG. 5) in the fourth example may be three or more.

[0088] <Third embodiment> In the first embodiment, an example has been described in which the target mechanism driven by at least one driving means is the ball screw 164. In the third embodiment, a configuration in which the target mechanism is another example will be described.

[0089] Fig. 6 is a diagram for explaining another target mechanism. In the following explanation of the other target mechanism, Fig. 6 will be mainly referred to, but Figs. 1 to 4 will also be referred to as appropriate.

[0090] In the first application example, the target mechanism is the screw 123, and the motor is a motor for moving the screw 123 in a predetermined direction (X-axis direction). The first application example is the application example described in the first embodiment.

[0091] In the second application example, the target mechanism is the screw 123, and the motor is a motor (third motor 163) for rotating the screw 123. To explain the second application example using Fig. 2, the screw 123 is rotated by a first operating mechanism 181 and a second operating mechanism 182. In this way, the idea of ​​the above embodiment can be applied even to the second application example.

[0092] In the third application example, the target mechanism is a pair of dies 117, 118 (see FIG. 1). Also, the motor is a motor (servo motor 151 in FIG. 1) for operating the pair of dies 117, 118 to an open state and a closed state. To explain the third application example using FIG. 2, the ball screw 164 and the screw 123 are replaced with a ball screw 119 and a pair of dies 117, 118, respectively. In this way, the ideas of the above-described embodiment can be applied even to the third application example.

[0093] Moreover, the predetermined process in the injection molding machine 100 in which the third application example is adopted is a process in which the control device 145 causes the injection molding machine 100 to execute a mold opening process (see the parentheses in step S14 in FIG. 3). The mold opening process is a process in which the pair of molds 117, 118 in a closed state are opened. For example, when the first operation mechanism 181 or the second operation mechanism 182 breaks down and the pair of molds 117, 118 are in a closed state, it is assumed that the pair of molds 117, 118 will be in an open state due to some kind of malfunction. In this case, a part of the injection molding machine 100 may collide with a person or object in the vicinity of the injection molding machine 100. Therefore, the injection molding machine 100 in which the third application example is adopted can suppress the occurrence of the above-mentioned collision by executing a mold opening process as a predetermined process.

[0094] In the fourth application example, the target mechanism is protruding mechanism 129, and the motor is servo motor 152 (see FIG. 1) for operating protruding mechanism 129. To explain the fourth application example using FIG. 2, ball screw 164 is replaced with a ball screw (not shown) for operating protruding mechanism 129, and screw 123 is replaced with protruding mechanism 129. In this way, the ideas of the above-described embodiments can be applied even to the fourth application example.

[0095] <Fourth embodiment> In the fourth embodiment, an example in which the switching notification in step S8 in FIG. 3 is replaced by another switching process will be described. FIG. 7 is a diagram for explaining the first operating mechanism 181 and the second operating mechanism 182 of the fourth embodiment. Referring to FIG. 7, the first amplifier 171 has a first control board 191 and a first feedback board 251. The second amplifier 172 has a second feedback board 252. The third amplifier 173 has a third control board 193 and a third feedback board 253. The fourth amplifier 174 has a fourth feedback board 254. Since the wiring A1 is connected to the second amplifier 172, the detection signal from the first encoder 201 is input to the first amplifier 171 and the second amplifier 172. Since the wiring A2 is connected to the fourth amplifier 174, the detection signal from the second encoder 202 is input to the third amplifier 173 and the fourth amplifier 174.

[0096] Fig. 8 is a flowchart showing the flow of processing of the injection molding machine 100 of the fourth embodiment. Fig. 8 is a flowchart in which step S8 and step S10 in Fig. 3 are replaced with step S40. In step S40, the control device 145 executes a process of switching the amplifiers that execute feedback control from the master amplifiers (first amplifier 171, third amplifier 173) to the slave amplifiers (second amplifier 172, fourth amplifier 174) by software processing. The other switching processes described above correspond to this switching process. The switching process will be specifically described.

[0097] When the first feedback board 251 of the first amplifier 171 is not broken, the first feedback board 251 feedback-controls the first motor 161. When the first control board 191 detects a failure of the first feedback board 251, the first control board 191 outputs a control signal to the second amplifier 172. The first control board 191 controls the second amplifier 172 by this control signal so that the second feedback board 252 feedback-controls the first motor 161 based on the rotational position of the first motor 161. The same process is also executed for the second operating mechanism 182. With this configuration, the injection molding machine 100 can switch the amplifier without imposing a burden on the user. The first control board 191 or the third control board 193 may be referred to as the control device 145. The control device 145 may detect a failure of the first feedback board 251 or a failure of the third feedback board 253.

[0098] <Other embodiments> (1) In the above embodiment, the predetermined process is described as a purge process or a mold clamping process, as shown in step S14 of FIG. 3. However, the predetermined process may be another process. In the following, a molded product that the injection molding machine 100 generates when the multiple power supply means are not broken is referred to as a "first molded product". A molded product that the injection molding machine 100 can mold with low drive is also referred to as a "second molded product". The predetermined process may be a process that causes the injection molding machine to generate a second molded product different from the first molded product. The predetermined process may be a process that notifies the user that the second molded product will be generated. According to such a configuration, the injection molding machine 100 can generate the above-mentioned second molded product even when low drive is performed. Therefore, even in the injection molding machine 100 in which such a configuration is adopted, a decrease in processing efficiency can be suppressed.

[0099] (2) In the above embodiment, an example has been described in which when the master amplifier breaks down (YES in step S6), the switching notification in step S8 of Fig. 3 is executed to cause the user to replace the wiring (for example, the first wiring 211). However, when the master amplifier breaks down, the switching notification may not be executed and the robot, instead of the user, may replace the wiring.

[0100] (3) In the above embodiment, an example has been described in which the control device 145 detects a failure in the master amplifier. However, other means may be used to detect a failure in the master amplifier. For example, a slave amplifier corresponding to a master amplifier may detect a failure in the master amplifier.

[0101] (4) In the above embodiment, the slave amplifiers (second amplifier 172 and fourth amplifier 174) have a control board as shown in Fig. 2. However, a configuration in which the slave amplifier does not have a control board may be adopted. When such a configuration is adopted, the switching notification not only switches the destination of the wiring to the slave amplifier, but also notifies that the control board of the master amplifier is to be mounted on the slave amplifier.

[0102] (5) In step S10 of Fig. 3, the control device 145 is configured to wait until the wiring switching is completed. However, the control device 145 may end the process of step S10 when it determines that a predetermined period has elapsed since the switching notification of step S8 was executed. In such a configuration, the operating mechanism equipped with the mask stamp does not generate a driving force, so the 50% drive of step S20 is executed.

[0103] (6) In the example of step S8 in FIG. 3, the content of the user notification is to switch the connection destination of the wiring to the slave amplifier. However, the content of the user notification may be other content as long as it is a method of repairing the injection molding machine 100 to cause the control device 145 to execute a predetermined process. For example, when the third amplifier 173 and the fourth amplifier 174 in FIG. 2 fail, the content of the user notification is as follows. The content of the user notification is "connect the power line of the second amplifier 172 to the second motor 162 so that the second amplifier 172 becomes the master amplifier of the second motor 162, and connect the second wiring 212 from the second encoder 202 to the second amplifier 172."

[0104] 2, in the case where the second amplifier 172 does not have the second control board 192, if the first amplifier 171 breaks down, the content of the user notification will be as follows: "Place the first control board 191 on the second amplifier 172, and connect the first wiring 211 from the first encoder 201 to the second amplifier 172."

[0105] The control device 145 executes such a user notification, and the user can repair the injection molding machine 100 based on the contents of the user notification, thereby causing the control device 145 to execute a predetermined process.

[0106] [Note] It will be appreciated by those skilled in the art that the exemplary embodiments described above are examples of the following aspects.

[0107] (Item 1) The injection molding machine of the present disclosure includes at least one target mechanism, at least one drive means, multiple power supply means, and a control device. The at least one drive means drives the at least one target mechanism. The multiple power supply means supply power to the at least one drive means. The control device controls the at least one drive means and the multiple power supply means. When any one of the multiple power supply means fails, the control device executes a predetermined process by having a non-failed power supply means of the multiple power supply means supply power to the at least one drive means.

[0108] (2) In the injection molding machine according to the 1st aspect, the at least one target mechanism includes one target mechanism. The at least one drive means includes a first motor that drives the one target mechanism and a second motor that drives the one target mechanism together with the first motor. The multiple power supply means include a first power supply means that supplies power to the first motor, a second power supply means that supplies power to the first motor together with the first power supply means, a third power supply means that supplies power to the second motor, and a fourth power supply means that supplies power to the second motor together with the second power supply means. The control device executes a predetermined process by causing the second power supply means to supply power to the first motor when the first power supply means fails, and executes a predetermined process by causing the fourth power supply means to supply power to the second motor when the third power supply means fails.

[0109] (Item 3) In the injection molding machine described in item 1, the at least one target mechanism is one target mechanism. The at least one motor is a first motor that drives the one target mechanism and a second motor that drives the one target mechanism together with the first motor. The multiple power supply means include a first power supply means that supplies power to the first motor and a second power supply means that supplies power to the second motor. When the first power supply means fails, the control device executes a predetermined process by having the second power supply means supply power to the second motor.

[0110] (4) In the injection molding machine described in 1, the at least one target mechanism is one target mechanism. The at least one motor is a first motor that drives the one target mechanism. The multiple power supplying means are a first power supplying means that supplies power to the first motor, and a second power supplying means that supplies power to the first motor together with the first power supplying means. When the first power supplying means fails, the control device executes a predetermined process by causing the second power supplying means to supply power to the motor.

[0111] (Item 5) In the injection molding machine according to item 1, the at least one target mechanism is a first target mechanism and a second target mechanism. The at least one drive means is a first motor that drives the first target mechanism and a second motor that drives the second target mechanism. The power supply means are a first power supply means that supplies power to the first motor, a second power supply means that supplies power to the first motor together with the first power supply means, a third power supply means that supplies power to the second motor, and a fourth power supply means that supplies power to the second motor together with the second power supply means. The control device executes a predetermined process by causing the second power supply means to supply power to the first motor when the first power supply means fails, and executes a predetermined process by causing the fourth power supply means to supply power to the second motor when the third power supply means fails.

[0112] (Item 6) In the injection molding machine described in any one of items 1 to 5, when the first power supply means fails, the control device notifies a user of a method for repairing the injection molding machine to cause the control device to execute a specified process.

[0113] (Item 7) The injection molding machine according to any one of Items 2, 4, and 5, further comprising a sensor for detecting a rotational position of the first motor. A wiring for acquiring the rotational position detected by the sensor is connected to the first motor drive device. The first motor drive device has a control board for feedback-controlling the first motor based on the rotational position of the first motor. If the first motor drive device fails, the control device notifies a user that the connection destination of the wiring will be switched from the first motor drive device to the second motor drive device.

[0114] (Item 8) The injection molding machine according to any one of items 2, 4, and 5, further comprising a sensor for detecting a rotational position of the first motor. The first power supply means has a first control board for feedback-controlling the first motor based on the rotational position of the first motor. The second power supply means has a second control board for feedback-controlling the first motor based on the rotational position of the first motor. When the first power supply means is not malfunctioning, the first control board feedback-controls the first motor. When the first power supply means is malfunctioning, the control device controls the second power supply means so that the second control board feedback-controls the first motor based on the rotational position of the first motor.

[0115] (Item 9) The injection molding machine according to any one of items 1 to 8, further comprising a cylinder that contains resin, and a screw disposed in the cylinder. The target mechanism is the screw.

[0116] (Item 10) In the injection molding machine according to item 9, the injection molding machine executes a purging process for removing residual resin remaining in the cylinder by operating the screw. The predetermined process includes a process for making the injection molding machine execute the purging process.

[0117] (Item 11) In the injection molding machine according to any one of items 1 to 10, the target mechanism further includes a pair of molds that are operable to an open state and a closed state. The target mechanism is the pair of molds.

[0118] (Item 12) In the injection molding machine according to item 11, the predetermined process includes a process of causing the injection molding machine to open the pair of molds that are in a closed state.

[0119] (Item 13) The injection molding machine according to any one of items 1 to 12, further comprising a pair of dies for molding a molded product, and an ejection mechanism for removing the molded product molded in the pair of dies. The target mechanism is the ejection mechanism.

[0120] (Item 14) In the injection molding machine according to any one of items 1 to 13, the injection molding machine produces a first molded product when the plurality of power supply means are not broken. The predetermined process is a process for making the injection molding machine produce a second molded product different from the first molded product.

[0121] (15th paragraph) In the injection molding machine according to any one of paragraphs 1 to 14, the at least one driving means is a plurality of motors. When any one of the plurality of motors fails, the control device executes the predetermined process by having a non-failed motor among the plurality of motors drive at least one target mechanism. For example, in the injection molding machine according to any one of paragraphs 2, 3, and 5, the control device executes the predetermined process by having the second motor drive at least one target mechanism when the first motor fails.

[0122] With regard to the above-mentioned embodiments and modified examples, it has been intended from the outset of the application that the configurations described in the embodiments may be appropriately combined, including combinations not mentioned in the specification, to the extent that no inconvenience or contradiction arises.

[0123] The embodiments disclosed herein should be considered to be illustrative and not restrictive in all respects. The scope of the present invention is defined by the claims, not the above description, and is intended to include all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0124] 17 servo amplifier group, 100 injection molding machine, 110 mold clamping device, 111 bed, 112 fixed platen, 113 mold clamping housing, 114 movable platen, 115 tie bar, 116 mold clamping mechanism, 117, 118 mold, 119, 164 ball screw, 120 injection device, 121 base, 122 heating cylinder, 123 screw, 124 actuator, 125 hopper, 126 injection nozzle, 128 temperature sensor, 129 ejection mechanism, 130 operation panel, 132 display, 140 command device, 142 memory, 145 control device, 151, 152 servo motor, 161 first motor, 162 second motor, 163 third motor, 164A first ball screw, 164B second ball screw, 171 first amplifier, 172 Second amplifier, 173 third amplifier, 174 fourth amplifier, 181 first operating mechanism, 182 second operating mechanism, 191 first control board, 192 second control board, 193 third control board, 194 fourth control board, 201 first encoder, 202 second encoder, 211 first wiring, 212 second wiring.

Claims

1. At least one target mechanism; At least one driving means for driving the at least one target mechanism; a plurality of power supply means for supplying power to the at least one driving means; a control device for controlling the at least one driving means and the plurality of power supply means; The control device, when any one of the plurality of power supply means fails, executes a predetermined process by having a non-failed power supply means among the plurality of power supply means supply power to the at least one drive means.

2. the at least one target mechanism is a single target mechanism; The at least one driving means a first motor that drives the one target mechanism; a second motor that drives the one target mechanism together with the first motor; The plurality of power supply means include a first power supply means for supplying power to the first motor; a second power supply means for supplying power to the first motor together with the first power supply means; a third power supply means for supplying power to the second motor; a fourth power supply means for supplying power to the second motor together with the second power supply means; The control device includes: When the first power supply means fails, the second power supply means supplies power to the first motor to execute the predetermined process; 2. The injection molding machine according to claim 1, wherein, when the third power supply means fails, the fourth power supply means supplies power to the second motor to execute the predetermined process.

3. the at least one target mechanism is a single target mechanism; The at least one motor is a first motor that drives the one target mechanism; a second motor that drives the one target mechanism together with the first motor; The plurality of power supply means include a first power supply means for supplying power to the first motor; a second power supply means for supplying power to the second motor; 2. The injection molding machine according to claim 1, wherein, when the first power supply means fails, the control device executes the predetermined process by causing the second power supply means to supply power to the second motor.

4. the at least one target mechanism is a single target mechanism; the at least one motor is a first motor that drives the one target mechanism, The plurality of power supply means include a first power supply means for supplying power to the first motor; a second power supply means for supplying power to the first motor together with the first power supply means; 2. The injection molding machine according to claim 1, wherein, when the first power supply means fails, the control device executes the predetermined process by causing the second power supply means to supply power to the motor.

5. the at least one target mechanism is a first target mechanism and a second target mechanism; The at least one driving means a first motor that drives the first target mechanism; a second motor that drives the second target mechanism; The plurality of power supply means include a first power supply means for supplying power to the first motor; a second power supply means for supplying power to the first motor together with the first power supply means; a third power supply means for supplying power to the second motor; a fourth power supply means for supplying power to the second motor together with the second power supply means; The control device includes: When the first power supply means fails, the second power supply means supplies power to the first motor to execute the predetermined process; 2. The injection molding machine according to claim 1, wherein, when the third power supply means fails, the fourth power supply means supplies power to the second motor to execute the predetermined process.

6. The injection molding machine according to any one of claims 2 to 5, wherein the control device notifies a user of a method for repairing the injection molding machine to cause the control device to execute the specified processing when the first power supply means fails.

7. The injection molding machine further includes a sensor that detects a rotational position of the first motor, a wiring for acquiring a rotational position detected by the sensor is connected to the first power supply means; the first power supply means has a control board that feedback controls the first motor based on a rotational position of the first motor, 6. The injection molding machine according to claim 2, wherein the control device notifies a user that a connection destination of the wiring will be switched from the first power supply means to the second power supply means when the first power supply means fails.

8. The injection molding machine further includes a sensor that detects a rotational position of the first motor, the first power supply means has a first feedback board that feedback-controls the first motor based on a rotational position of the first motor; the second power supply means has a second feedback board that feedback controls the first motor based on a rotational position of the first motor; When the first power supply means is not at fault, the first feedback board feedback controls the first motor; 6. The injection molding machine according to claim 2, wherein, when the first power supply means fails, the control device controls the second power supply means so that the second feedback board feedback controls the first motor based on the rotational position of the first motor.

9. The injection molding machine further comprises: A cylinder for containing resin; A screw disposed in the cylinder, The injection molding machine according to claim 1 , wherein the target mechanism is the screw.

10. the injection molding machine performs a purging process for removing residual resin remaining in the cylinder by operating the screw; The injection molding machine according to claim 9 , wherein the predetermined process includes a process of causing the injection molding machine to execute the purging process.

11. The target mechanism further includes a pair of molds that are operable between an open state and a closed state; The injection molding machine according to claim 1 , wherein the target mechanism is the pair of molds.

12. The injection molding machine according to claim 11 , wherein the predetermined process includes a process of causing the injection molding machine to change the pair of molds in the closed state to the open state.

13. The injection molding machine further comprises: A pair of dies for forming a molded product; and an ejection mechanism for ejecting a molded product molded in the pair of molds, The injection molding machine according to any one of claims 1 to 5, wherein the target mechanism is the ejection mechanism.

14. the injection molding machine produces a first molded product when the plurality of power supply means are not faulty; The injection molding machine according to any one of claims 1 to 5, wherein the predetermined process is a process for causing the injection molding machine to produce a second molded product different from the first molded product.

15. 6. The injection molding machine according to claim 2, wherein, when the first motor fails, the control device executes the predetermined process by causing the second motor to drive the at least one target mechanism.

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