Injection molding machine

Abstract

To provide an injection molding machine in which security of a control board is secured.SOLUTION: An injection molding machine (1) assembled with control boards (5, 6, 7) and a controller (8) is disclosed. The control boards (5, 6, 7) are covered with openable / closable covers (33, 34, 35), and the covers (33, 34, 35) are provided with electronic locks (41, 42, 43) for locking. Upon an unlocking request, the controller (8) determines whether or not to unlock in accordance with a user level of a log-in user.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to an injection molding machine in which a cover is provided on a control panel. [Background technology]

[0002] An injection molding machine is composed of a clamping device that clamps a mold, an injection device that melts an injection material and injects it into the mold, and the like. If the molding conditions are set appropriately, even an ordinary user can execute a molding cycle. However, setting appropriate molding conditions requires the work of an experienced user. Therefore, the controller of the injection molding machine is provided with a user authentication mechanism, as described in Patent Document 1, for example. When a user logs in to the controller, the range of operation of the injection molding machine is determined according to the user level of the user. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2015-232742 A Summary of the Invention [Problem to be solved by the invention]

[0004] An injection molding machine is equipped with one or more control panels and is covered. However, the control panel covers are simply screwed in place, and there are no restrictions on opening and closing the covers. This creates the problem that anyone can operate or change the control panels.

[0005] The present disclosure provides an injection molding machine in which the security of the control panel is ensured.

[0006] Other objects and novel features will become apparent from the description of this specification and the accompanying drawings. [Means for solving the problem]

[0007] Install an electronic lock on the control panel cover. Unlocking the electronic lock Whether this is possible or not depends on whether the servo amplifier is in the servo ON state (power is being supplied to the servo amplifier) ​​or in the servo OFF state (power is not being supplied to the servo amplifier). This is to be determined by the controller. Effect of the Invention

[0008] The present disclosure ensures the security of the control panel by having the controller determine whether to unlock the door. [Brief description of the drawings]

[0009] [Figure 1] 1 is a front view showing an injection molding machine according to an embodiment of the present invention; [Diagram 2] 2 is a top cross-sectional view showing a cover provided on a control panel according to the present embodiment. FIG. [Diagram 3] FIG. 2 is a block diagram showing the connection relationship between a controller of the injection molding machine according to the present embodiment and an electronic lock and the like provided on a control panel. [Figure 4] FIG. 13 is a diagram showing an unlocking request screen displayed on a controller of the injection molding machine according to the present embodiment. [Diagram 5] 5 is a flowchart showing an unlocking process for an electronic lock on a control panel cover, which is performed in a controller of the injection molding machine according to the present embodiment. [Figure 6] 5 is a flowchart showing a process performed in a controller of the injection molding machine according to the present embodiment in response to a drive request from a user. [Figure 7] 5 is a flowchart showing a process for unlocking an electronic lock of a safety door, which is performed in a controller of the injection molding machine according to the present embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Specific embodiments will be described in detail below with reference to the drawings. However, the present invention is not limited to the following embodiments. In order to clarify the description, the following description and drawings are appropriately simplified. In each drawing, the same elements are given the same reference numerals, and duplicated descriptions are omitted as necessary. In addition, hatching is omitted in some parts to avoid cluttering the drawings.

[0011] The present embodiment will be described. <Injection molding machine> 1, an injection molding machine 1 according to this embodiment includes a mold clamping unit 2 placed on a bed B, and an injection unit 3 also placed on the bed B. Control panels 5, 6, and 7 for controlling the individual units of the injection molding machine 1 are provided within the bed B of the injection molding machine 1, and a controller 8 for controlling the entire machine is provided on the bed B.

[0012] <Mold clamping device> The mold clamping device 2 includes a fixed platen 10 fixed on a bed B, a mold clamping housing 11 that slides on the bed B, and a movable platen 12 that similarly slides on the bed B. The fixed platen 10 and the mold clamping housing 11 are connected by a plurality of, for example, four tie bars 14, 14, .... The movable platen 12 is slidable between the fixed platen 10 and the mold clamping housing 11. A mold clamping mechanism 16 consisting of a toggle mechanism is provided between the mold clamping housing 11 and the movable platen 12. The mold clamping mechanism 16 may be composed of a direct pressure type mold clamping cylinder. A fixed side mold 17 and a movable side mold 18 are provided on the fixed platen 10 and the movable platen 12, respectively, and the mold is opened and closed when the mold clamping mechanism 16 is driven.

[0013] Safety is ensured by covering the mold clamping unit 2 with a mold clamping unit cover 20 and a safety door 21. The safety door 21 is provided with an electronic lock 23. As will be described in detail later, in the injection molding machine 1 according to this embodiment, the conditions for unlocking the electronic lock 23 of the safety door 21 differ depending on the user level of the user who is logged in to the controller 8, thereby enhancing safety.

[0014] <Injection device> The injection device 3 is composed of a heating cylinder 25, a screw 27 placed in the heating cylinder 25, and a screw drive device 28 that drives the screw 27. The heating cylinder 25 is provided with a hopper 30 and an injection nozzle 31. When the screw 27 is rotated to supply resin material from the hopper 30, the resin material is melted and measured inside the heating cylinder 25. When the screw 27 is driven in the axial direction, the molten resin is injected from the injection nozzle 31.

[0015] <Control panel> In the injection molding machine 1 according to this embodiment, a high-voltage control panel 5, a low-voltage control panel 6, and a heater control panel 7 are provided within the bed B. The high-voltage control panel 5 is a control panel for controlling devices that operate at high voltage, such as a servo amplifier. The low-voltage control panel 6 is a control panel for controlling devices that operate at a relatively low voltage. The heater control panel 7 is a control panel for supplying power to the heater. These control panels 5, 6, and 7 are provided with openable and closable covers 33, 34, and 35, respectively, for protection.

[0016] <Control panel cover> In the injection molding machine 1 according to this embodiment, the covers 33, 34, 35 provided on the control panels 5, 6, 7 are provided with handles 37, 38, 39 for opening and closing. Furthermore, the covers 33, 34, 35 have a structure unique to this embodiment. Specifically, the covers 33, 34, 35 are provided with electronic locks 41, 42, 43 for restricting opening and closing, and unlock request buttons 45, 46, 47 for requesting the unlocking of these electronic locks 41, 42, 43, respectively.

[0017] 2 shows a top cross-sectional view of cover 33 of high voltage control panel 5. The other covers 34, 35 are constructed in the same way, so only cover 33 will be described. One end of cover 33 is attached to a support 50 by a hinge 51, and the other end is adapted to come into contact with support 53 to close, and to move away from support 53 to open. In other words, it can be opened and closed. An electronic lock 41 is provided on support 53 and cover 33, and an unlock request button 45 is provided on support 53.

[0018] <Electronic cover lock> The electronic lock 41 is composed of a main body 55 attached to the support 53 and a receiving member 56 attached to the cover 33. The main body 55 is composed of a hollow main body case 57, a latch 59 housed in the main body case 57, a spring 60 that biases the latch 59 so as to push it outward, and a solenoid 62 that drives the latch 59 in a direction that draws it into the main body case 57. The receiving member 56 is formed with a recess 63, in which the tip of the latch 59 is housed and locked. When power is supplied to the solenoid 62, the latch 59 retracts to unlock the cover 33, and the cover 33 can be opened.

[0019] The latch 59 has a tapered tip. Therefore, when the cover 33 is closed, the latch 59 is pushed by the receiving member 56 and pushed into the main body case 57. When the latch 59 reaches a position where it is aligned with the recess 63 of the receiving member 56, the latch 59 is pushed by the spring 60 and the tip is stored in the recess 63. In other words, the latch 59 is automatically locked.

[0020] The electronic locks 41, 42, 43 (see FIG. 1) and the unlocking request buttons 45, 46, 47 are connected to the controller 8. As will be described later, the controller 8 receives an unlocking request from the unlocking request buttons 45, 46, 47 and determines whether or not to unlock the locks. The electronic locks 41, 42, 43 do not need to be limited to the structure described above, and any type or structure is acceptable as long as they are unlocked by the judgment of the controller 8 (see FIG. 1).

[0021] <Controller> As shown in Fig. 3, the controller 8 of this embodiment is provided with a control unit 70, a safety door processing unit 71, and a communication unit 72. The control unit 70 controls a servo amplifier 75 that supplies power to a servo motor, controls each device of the injection molding machine 1 (see Fig. 1), and executes a molding cycle. The safety door processing unit 71 controls the unlocking of the electronic lock 23 of the safety door 21 (see Fig. 1). As will be described later, the safety door processing unit 71 has a process unique to this embodiment, and changes the unlocking conditions according to the user level of the user. The communication unit 72 communicates with an external device such as a PC via a LAN (not shown) or the like.

[0022] As shown in Fig. 3, the controller 8 of the injection molding machine 1 according to the present embodiment is also provided with a processing section unique to this embodiment. Specifically, it is a control panel electronic lock processing section 74. As already described, the electronic locks 41, 42, 43 and the unlock request buttons 45, 46, 47 provided for the high voltage control panel 5 (see Fig. 1), the low voltage control panel 6, and the heater control panel 7 are connected to the controller 8. When the unlock request buttons 45, 46, 47 are pressed, the control panel electronic lock processing section 74 receives the unlock request, and the control panel electronic lock processing section 74 determines whether the electronic locks 41, 42, 43 can be unlocked. The controller 8 is also provided with an unlock history log file 73. The history of the electronic locks 41, 42, 43 unlocked by the control panel electronic lock processing section 74 is recorded.

[0023] <Unlock request screen> 1, the controller 8 is provided with a monitor 9, which displays various screens for operating the injection molding machine 1. In this embodiment, the monitor 9 is configured to display an unlock request screen 77 (see FIG. 4) for requesting the unlocking of the electronic locks 41, 42, 43 of the covers 33, 34, 35 of the control panels 5, 6, 7.

[0024] The unlock request screen 77 is provided with a plurality of radio buttons 78, 79, 80 corresponding to the control panels 5, 6, 7 (see FIG. 1). The radio buttons 78, 79, 80 allow the user to select the target of the unlock request. The unlock request screen 77 is also provided with an unlock request execution button 81. After selecting the target of the unlock request with the radio buttons 78, 79, 80, the unlock request execution button 81 is pressed. This causes the unlock request to be sent to the controller 8.

[0025] <Control panel electronic lock unlocking process> The process of unlocking the electronic locks 41, 42, 43 of the control panels 5, 6, 7, which is performed by the controller 8 of the injection molding machine 1 (see FIG. 1) according to this embodiment, will be described with reference to FIG. 5 and the following Table 1. Note that user levels are listed in Table 1, but the user levels represent operating authority that defines the range of operations that can be performed in the injection molding machine 1 (see FIG. 1), and are given to each user.

[0026] [Table 1]

[0027] The user presses the unlock request button 45, 46, 47 provided on the control panel 5, 6, 7 (see FIG. 1). Alternatively, the user operates the unlock request screen 77 (see FIG. 4) to request unlocking of the desired control panel 5, 6, 7. This causes the unlock request to be sent to the control panel electronic lock processing unit 74 (see FIG. 3) of the controller 8. The control panel electronic lock processing unit 74 receives the unlock request as shown in FIG. 5 (step S01).

[0028] The control panel electronic lock processing unit 74 first executes step S02 to check whether the injection molding machine 1 (see FIG. 1) is in an emergency stop or not. If it is in an emergency stop, the process proceeds directly to step S09 to unlock the electronic locks 41, 42, 43 (see FIG. 1) for which there is an unlocking request. That is, as shown in Table 1, the unlocking request is permitted and unlocked regardless of the user level. At this time, the unlocking history is recorded in the unlocking history log file 73 (see FIG. 3). The covers 33, 34, 35 of the unlocked control panels 5, 6, 7 (see FIG. 1) can be opened. On the other hand, if the injection molding machine 1 is not in an emergency stop, the process proceeds to step S03.

[0029] In step S03, it is checked whether the user is logged in to the controller 8 (see FIG. 1). If the user is not logged in, that is, if the user is logged out, the process proceeds to step S08. In other words, the unlock request is rejected. In Table 1, the user level is listed as 0. On the other hand, if the user is logged in, the control panel electronic lock processing unit 74 proceeds to step S04.

[0030] The control panel electronic lock processing unit 74 (see FIG. 3) executes step S04 as shown in FIG. 5, and checks the user level of the logged-in user. If the user level is 1, the process proceeds to unlock prohibition processing in step S08. That is, as shown in Table 1, the control panel electronic lock processing unit 74 denies all unlock requests to users with a user level of 1. For reference, the authority given to a user with a user level of 1 is limited to a small range. That is, the authority given to the user is limited to only monitoring each process of the molding cycle and changing the set value of the resin temperature. Therefore, unlock requests are denied to users with a user level of 1.

[0031] On the other hand, when the user level is 2 or 3, as shown in Table 1, the unlocking request is permitted if certain conditions are met, and when the user level is 4, all unlocking requests are permitted regardless of the conditions and the unlocking is executed. Specifically, the control panel electronic lock processing unit 74 processes as follows. First, when the user level is 2, the control panel electronic lock processing unit 74 proceeds to step S05, which will be described later. When the user level is 3, the control panel electronic lock processing unit 74 proceeds to step S07, which will be described later. Then, when the user level is 4, the control panel electronic lock processing unit 74 proceeds to step S09 and unlocks the electronic locks 41, 42, 43 (see FIG. 1) for which there is a request to unlock. Next, the unlocking history is recorded in the unlocking history log file 73 (see FIG. 3).

[0032] Here, we will interrupt the explanation of the processing of the control panel electronic lock processing unit 74 and explain the authority given to users with user levels 2 to 4 for reference. First, a user with user level 2 is given the authority to change various setting data such as molding conditions in addition to the authority given to a user with user level 1. A user with user level 3 is given the authority to operate all screens prepared by the controller 8 of the injection molding machine 1. However, he is not given the authority to operate the system screen for changing system information. Only a user with user level 4 is given all operation authority, including the authority to operate the system screen.

[0033] Returning to the explanation of the processing of the control panel electronic lock processing unit 74, the processing of step S05 is performed for a user with a user level of 2. In this processing, the control panel electronic lock processing unit 74 (see FIG. 3) checks whether or not the servo is OFF. The servo OFF state is a state in which no power is supplied to the servo amplifier 75 (see FIG. 3). If the servo is ON, that is, power is supplied to the servo amplifier 75, the process proceeds to step S08 and the unlock request is rejected. On the other hand, if the servo is OFF, the control panel electronic lock processing unit 74 proceeds to step S06.

[0034] In step S06, the control panel electronic lock processing unit 74 checks the object for which the unlocking request is made. If the object for which the unlocking request is made is the electronic lock 41, i.e., the high voltage control panel 5 (see FIG. 1), the process proceeds to step S08 and the unlocking request is rejected. If the object for which the unlocking request is made is the low voltage control panel 6 (see FIG. 1) or the heater control panel 7, the process proceeds to step S09 and the panel is unlocked. The unlocking history is then recorded in the unlocking history log file 73 (see FIG. 3).

[0035] The process of step S07 is performed for a user with a user level of 3. In this process, the control panel electronic lock processing unit 74 (see FIG. 3) checks whether the injection molding machine 1 (see FIG. 1) is in the molding cycle. If it is in operation, the process proceeds to step S08 and the unlocking request is rejected. On the other hand, if the molding cycle is stopped, the process proceeds to step S09 and the unlocking request is permitted and the door is unlocked. The unlocking history is then recorded in the unlocking history log file 73 (see FIG. 3). The control panel electronic lock processing unit 74 then ends the process.

[0036] When an accessory device is added to the injection molding machine 1, the control panels 5, 6, and 7 may be modified, for example, by adding a relay to the control panels 5, 6, and 7. In conventional injection molding machines, the covers 33, 34, and 35 of the control panels 5, 6, and 7 are simply screwed, and anyone can modify the control panels 5, 6, and 7. This causes a problem that even if the control panels 5, 6, and 7 are erroneously modified, this cannot be prevented. The covers 33, 34, and 35 can be opened regardless of the operating state of the injection molding machine 1, and therefore there is a problem in terms of safety. The injection molding machine 1 according to the present embodiment (see FIG. 1) determines whether the electronic locks 41, 42, and 43 can be unlocked based on the user level and based on the operating state as described above. Therefore, it is possible to limit the users who can modify the control panels 5, 6, and 7, and safety is improved.

[0037] The process of step S09 has been described as simply unlocking the electronic locks 41, 42, 43 for which an unlocking request has been made and recording the history in the unlocking history log file 73. However, the control panel electronic lock processing unit 74 may communicate with an external PC or the like via the communication unit 72 (see FIG. 3) in step S09 to provide information about the unlocked electronic locks 41, 42, 43. In this way, the external PC can confirm that the electronic locks have been unlocked.

[0038] <Processing drive requests> The control panel electronic lock processor 74 according to this embodiment also has a function of determining whether or not to grant a drive request when it is made in the controller 8 of the injection molding machine 1 (see FIG. 1). This function increases the safety of the injection molding machine 1. The drive requests that it handles include a request to start the supply of power to the servo amplifier 75 (see FIG. 3), i.e., a servo ON request, and an operation start request, which requests the start of a molding cycle. The processing of the control panel electronic lock processor 74 will be described with reference to FIG. 6.

[0039] When the user issues a drive request such as a servo ON request or an operation start request in the controller 8 (see FIG. 3), the control panel electronic lock processing unit 74 receives this request in step S11 as shown in FIG. 6. Upon receiving the drive request, the control panel electronic lock processing unit 74 executes step S12 to check whether or not all of the electronic locks 41, 42, and 43 of the control panels 5, 6, and 7 (see FIG. 1) are locked. If they are locked, the process proceeds to step S18 to permit and execute the drive request. That is, the servo is turned ON. Or, the molding cycle operation is started. On the other hand, if any one of the electronic locks 41, 42, and 43 of the control panels 5, 6, and 7 is unlocked, the process proceeds to step S13. This is because if any one of the electronic locks 41, 42, and 43 is not locked, it is necessary to check whether or not the drive request should be permitted depending on the user level.

[0040] In step S13, the control panel electronic lock processing unit 74 checks whether the controller 8 is in a logged-in state. If the user is not logged in, the process proceeds to step S17 and the drive request is rejected. In other words, the servo ON request and operation start request are rejected. This is because it is dangerous to accept a drive request without a user logged in when there are unlocked electronic locks 41, 42, 43. On the other hand, if the user is logged in, the process proceeds to step S14.

[0041] The control panel electronic lock processing unit 74 checks the user level of the logged-in user in step S14 and branches the process based on the respective user level. If the user level is 1 or 2, the process proceeds to step S17 and the drive request is rejected. This is because it is dangerous to accept a drive request from a user whose user level is not high when there are unlocked electronic locks 41, 42, 43. If the user level is 4, the process proceeds to step S18 and the drive request is executed. In other words, the servo is turned on or the molding cycle is started.

[0042] On the other hand, if the user level is 3, the process proceeds to step S15. In step S15, it is checked whether the electronic lock 41 of the high-voltage control panel 5 (see FIG. 1) is locked or not. If it is unlocked, the process proceeds to step S17 and the drive request is rejected. This is because it is dangerous to permit a drive request when the high-voltage control panel 5 is unlocked, even if the user is at user level 3. On the other hand, if the electronic lock 41 of the high-voltage control panel 5 is locked, the process proceeds to step S16 and the type of the drive request is checked. If the drive request is an operation start request, the process proceeds to step S17 and the drive request is rejected. On the other hand, if the drive request is a servo ON request, the process proceeds to step S18 and the drive request is executed. That is, the servo is turned ON. That is, the operation of the molding cycle cannot be started, but the servo ON can be permitted. The control panel electronic lock processing unit 74 ends the process.

[0043] In this way, the control panel electronic lock processing unit 74 according to the present embodiment determines whether or not a drive request is permitted based on the locking state of the control panels 5, 6, and 7 and the user level, thereby ensuring a high level of safety.

[0044] <Safety door processing section> In a conventional injection molding machine, the safety door is not unlocked when the molding cycle is in operation, and is permitted to be unlocked when the operation is stopped, thereby ensuring safety. Similarly, in the injection molding machine 1 (see FIG. 1) according to this embodiment, the electronic lock 23 of the safety door 21 is refused to be unlocked when the molding cycle is in operation, and is permitted to be unlocked when the molding cycle is stopped, so that the safety door 21 can be opened. In this embodiment, the unlocking of the electronic lock 23 of the safety door 21 is further restricted based on the user level, thereby enhancing safety. The processing of the safety door processing unit 71 (see FIG. 3) will be described with reference to FIG. 7.

[0045] When a request is made to unlock the electronic lock 23 of the safety door 21 in the injection molding machine 1 (see FIG. 1), the unlock request is notified to the safety door processing unit 71 (see FIG. 3). This is shown as step S21 in FIG. 7. The safety door processing unit 71 executes step S22 to check whether the injection molding machine 1 is in an emergency stop or not. If it is in an emergency stop, the process proceeds to step S28 and the electronic lock 23 is unlocked. In other words, the safety door 21 can be opened. If it is not in an emergency stop, the process proceeds to step S23.

[0046] In step S23, the safety door processing unit 71 checks whether or not the molding cycle is in operation. If it is in operation, the process proceeds to step S27 and rejects the unlocking request. In other words, the electronic lock 23 is not unlocked. On the other hand, if the molding cycle is stopped, the process proceeds to step S24. The safety door processing unit 71 checks the time that has elapsed since the molding cycle was stopped. If a specified time has elapsed, the process proceeds to step S28 and unlocks the electronic lock 23. On the other hand, if the specified time has not elapsed, the process proceeds to step S25. The specified time can be, for example, 30 seconds, 1 minute, etc. As the specified time elapses, the temperature of the resin drops and the danger is reduced.

[0047] In step S25, the safety door processing unit 71 checks whether the controller 8 (see FIG. 1) is in a logged-in state. If the controller 8 is not in a logged-in state, the process proceeds to step S27 and does not permit the electronic lock 23 to be unlocked. On the other hand, if the controller 8 is in a logged-in state, the process proceeds to step S26. The safety door processing unit 71 checks the user level in step S26. If the user level is 1, the process proceeds to step S27 and does not permit the electronic lock 23 to be unlocked. On the other hand, if the user level is 2 to 4, the process proceeds to step S28 and unlocks the electronic lock 23. This is because there is little danger for users with user levels of 2 to 4 even if the electronic lock 23 of the safety door 21 is unlocked immediately after the molding cycle is stopped.

[0048] <Modification of this embodiment> The injection molding machine 1 according to the present embodiment can be modified in various ways. For example, in the present embodiment, the unlocking request for the electronic locks 41, 42, 43 of the control panels 5, 6, 7 can be executed from either the unlocking request button 45, 46, 47 or the unlocking request screen 77. However, it is not necessary to provide both the unlocking request button 45, 46, 47 and the unlocking request screen 77 in the injection molding machine 1. It is sufficient to provide only one of them. The injection molding machine 1 according to the present embodiment has been described as having three control panels 5, 6, 7, namely, the high-pressure control panel 5, the low-pressure control panel 6, and the heater control panel 7. However, the control panels may be provided in one or two units, or in four or more units.

[0049] In this embodiment, the control panel electronic lock processing unit 74 has been described as recording the unlocking history in the unlocking history log file 73. However, recording is not necessarily required. The control panel electronic lock processing unit 74 has also been described as being capable of transmitting information to an external PC via the communication unit 72. In this way, the unlocking history can be managed, for example, in an external PC.

[0050] The controller 8 can also be modified. Although the power supply for the controller 8 has not been specifically described in this embodiment, a power supply separate from the main power supply for the injection molding machine 1 (see FIG. 1) may be prepared. In other words, the controller 8 may be configured to start up independently without turning on the power for the injection molding machine 1. Even if the main power supply for the injection molding machine 1 is turned off, as long as the controller 8 is up and running, it can process the unlocking requests of the electronic locks 41, 42, 43 of the control panels 5, 6, 7 and unlock them as appropriate. Since no power is supplied to the control panels 5, 6, 7, they can be safely maintained.

[0051] Although the invention made by the present inventor has been specifically described above based on the embodiment, it goes without saying that the present invention is not limited to the embodiment already described, and various modifications are possible without departing from the gist of the invention. The above-described examples may be implemented in appropriate combination. [Explanation of symbols]

[0052] 1 Injection molding machine 2 Mold clamping device 3 Injection unit 5 High pressure control panel 6 Low voltage control panel 7 Heater control panel 8 Controller 9 Monitor 10 Fixed platen 11 Clamping housing 12 Movable platen 14 Tie bar 16 Mold clamping mechanism 17 Fixed side mold 18 Movable mold 20 Clamping unit cover 21 Safety Door 23 Electronic Lock 25 Heating cylinder 27 Screw 28 Screw drive unit 33 Cover 34 Cover 35 Cover 41 Electronic lock 42 Electronic lock 43 Electronic lock 45 Unlock request button 46 Unlock request button 47 Unlock request button 50 Support 51 Hinge 53 Support 55 Main body 56 Receiving member 57 Main body case 59 Latch 60 Spring 62 Solenoid 63 Recess 70 control section 71 safety door processing section 72 Communication unit 73 Unlocking history log file 74 Control panel electronic lock processing unit 75 Servo amplifier 77 Unlock request screen 78 Radio button 79 Radio Button 80 Radio Button 81 Unlock request execution button B Bed

Claims

1. A control panel and A controller, The control panel is covered with an openable cover, and the cover is locked with an electronic lock. Whether or not the electronic lock can be unlocked is determined by the controller based on whether power is supplied to a servo amplifier (servo ON state) or not (servo OFF state).

2. The injection molding machine according to claim 1 , wherein whether or not the electronic lock can be unlocked is determined based on a user level of a user who is logged in to the controller.

3. 3. The injection molding machine according to claim 1, wherein the electronic lock is permitted to be unlocked when the injection molding machine is in an emergency stop state.

4. the injection molding machine is provided with a plurality of the control panels, each of the plurality of control panels is provided with the cover and is locked by the electronic lock, 4. The injection molding machine according to claim 1, wherein whether or not the electronic lock can be unlocked is determined for each of the control panels.

5. 5. The injection molding machine according to claim 1, wherein the controller is provided with a monitor, and an unlock request screen for requesting unlocking of the electronic lock is displayed on the monitor.

6. 6. The injection molding machine according to claim 1, wherein the cover is provided with an unlock request button, and when the unlock request button is operated, an unlock request is notified to the controller.

7. 3. The injection molding machine according to claim 2, wherein when the user operates the controller to make a servo ON request to change a servo amplifier from a servo OFF state in which power is not supplied to the servo amplifier to a servo ON state in which power is supplied, the servo ON request is permitted based on a locking state of the electronic lock and the user level.

8. 8. The injection molding machine according to claim 2 or 7, wherein, when the user operates the controller to make an operation start request to start an operation from a stopped state of a molding cycle, the operation start request is permitted based on a locking state of the electronic lock and the user level.

9. 9. The injection molding machine according to claim 1, wherein the controller includes a communication means, and when it is detected that the electronic lock has been unlocked, the communication means transmits a notification to an outside source.

10. 10. The injection molding machine according to claim 1, wherein the electronic lock is maintained in a locked state during a power outage in which a main power source of the injection molding machine is turned off.

11. 11. The injection molding machine according to claim 1, wherein the controller is adapted to record a history of unlocking the electronic lock.

12. The injection molding machine according to any one of claims 1 to 11, wherein unlocking of the safety door of the injection molding machine is permitted a specified time after the molding cycle has stopped when the controller is logged out.

13. 3. The injection molding machine according to claim 2, wherein unlocking of the safety door of the injection molding machine is permitted a specified time after a molding cycle has stopped when the user level is equal to or lower than a specified level.

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