Troubleshooting method for injection molding machine and injection molding machine

Abstract

To provide a trouble avoidance method for an injection molding machine capable of avoiding trouble when automatic operation is started using stored molding conditions, and the injection molding machine.SOLUTION: A trouble avoidance method when setting molding conditions for an injection molding machine 11 compares original molding conditions regarding stored past molding conditions with new molding conditions set based on the original molding conditions, and if there are differences or deviations beyond a certain level between the two, reports an alarm or disables the start of automatic operation.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a method for avoiding troubles in an injection molding machine and an injection molding machine.

Background Art

[0002] When a new mold is attached to an injection molding machine, it is necessary to set new molding conditions regarding the operation of each part of the injection molding machine. Setting new molding conditions requires working time and the skill of the operator. During the setting of the molding conditions, the operator generally operates the injection molding machine manually, and after the setting of the molding conditions is completed, the injection molding machine is operated by automatic operation.

[0003] Once the set molding conditions are saved in the injection molding machine, when molding the same molded product with the same mold next time, the saved molding conditions are read out and used. As a result, the time required to newly set the molding conditions becomes unnecessary, and even an operator with relatively little experience can easily mold the molded product by automatic operation.

[0004] When it is desired to further shorten the molding time of the molded product or improve the appearance of the molded product, the saved molding conditions may be modified and used. Or when the injection molding machine including the mold is used for many years due to wear and deterioration of each part, or when each part is replaced or the function is upgraded, it is often necessary to modify the saved molding conditions. Furthermore, there are cases where the resin material is changed due to problems such as improving the appearance of the molded product or raw material cost, and in such cases, it is often necessary to modify the saved molding conditions.

[0005] Regarding the setting and display of the molding conditions as described above, those described in Patent Document 1 are known. Patent Document 1 is to inform the operator by color-coding or the like on the setting screen the changed items and the unchanged items because there is a possibility of abnormal operation if there is a forgotten change in the set values among a plurality of items of the molding conditions.

Prior Art Documents

Patent Documents

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2001-150507 [Summary of the Invention] [Problems to be Solved by the Invention]

[0007] However, as described above, the operation of newly setting all the molding conditions is limited to cases such as when a new mold is attached to an injection molding machine. When the molding conditions corresponding to the existing mold are already stored in the injection molding machine, most of the time, some of the molding conditions are modified and used. When modifying and using such stored molding conditions, since the basic items are already set, even if there is an oversight in setting the molding conditions, it can be said that, unless there are significant changes in the equipment, major abnormalities are unlikely to occur.

[0008] On the other hand, since Patent Document 1 regards oversight as a problem, it seems that it only focuses on preventing damage to the equipment due to oversight when setting new molding conditions. Therefore, an object of the present invention is to provide a trouble avoidance method for an injection molding machine and an injection molding machine that can avoid troubles when starting automatic operation using stored molding conditions.

[0009] Other problems and novel features will become apparent from the description of this specification and the accompanying drawings. [Means for Solving the Problems]

[0010] The trouble avoidance method for an injection molding machine according to claim 1 of the present invention is a trouble avoidance method when setting molding conditions for an injection molding machine. It compares the original molding conditions regarding the stored past molding conditions with the latest molding conditions set based on the original molding conditions. If there are differences or deviations of a certain degree or more between the two, an alarm is notified or automatic operation cannot be started. [Effects of the Invention]

[0011] The trouble avoidance method for an injection molding machine of the present invention is a trouble avoidance method when setting the molding conditions of an injection molding machine. It compares the original molding conditions regarding the stored past molding conditions with the latest molding conditions set based on the original molding conditions. If there are differences or deviations of a certain degree or more between the two, an alarm is notified or the automatic operation cannot be started, so that troubles can be avoided when starting the automatic operation. The injection molding machine of the present invention also has the same effect.

Brief Description of the Drawings

[0012]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Modes for Carrying Out the Invention

[0013] <Configuration of the Injection Molding Machine> The injection molding machine 11 according to an embodiment of the present invention will be described with reference to FIG. 1. The injection molding machine 11 includes a mold clamping device 13 and an injection device 14 on a base 12. The mold clamping device 13 includes two mold opening and closing mechanisms 19 using servo motors for moving a movable platen 18 to which a movable mold 17 is attached relative to a fixed platen 16 to which a fixed mold 15 is attached, and a mold clamping mechanism 20 using four mold clamping cylinders for clamping the fixed mold 15 and the movable mold 17. In the present invention, the mold opening and closing mechanism 19 may use a hydraulic cylinder. Further, the mechanism of the mold clamping device 13 is not limited, and may be an electric toggle mold clamping device using a servo motor or a toggle mold clamping device using a hydraulic cylinder. Further, the mold clamping device 13 may be one in which the movable platen and the movable mold perform mold opening and closing operations in the vertical direction.

[0014] The molding die 21, which is composed of the fixed die 15 and the movable die 17 and is attached to the mold clamping device 13, includes movable parts such as a first core mechanism 22, a second core mechanism 23, an ejector mechanism (not shown), a gate mechanism, etc., and a temperature control mechanism. Then, the molding die 21 is exchanged in response to changes in the molded product molded by the injection molding machine 11. Further, in response to the exchange of the molding die 21 or the change of the resin used for molding even with the same molding die 21, the injection molding machine 11 operates under different molding conditions. The molding conditions of the molding die 21 molded in the past are usually stored in the control device 24 of the injection molding machine 11. However, the molding conditions may be stored in a server or a personal computer of a central management device other than the injection molding machine 11 and sent to the control device 24 of the injection molding machine 11 through various communication media for use.

[0015] Here, the "molding conditions" refer to operation setting items including control amounts, control timings, control sequences, commands for the presence or absence of control, etc. for operating the injection molding machine by the control device 24. In particular, it refers to operation setting items including control amounts, control timings, control sequences, and settings for the presence or absence of control in sequence control used when performing automatic operation including semi-automatic operation and full-automatic operation. Further, the "molding conditions" of the present invention include setting values at the start of automatic operation, etc., and cases where the control amount is changed during automatic operation, for example, in response to thermal expansion of the mold.

[0016] The injection device 14 is provided with a screw (not shown) inside the heating cylinder 25. The screw is rotationally driven by a servo motor for plasticization (not shown), and the resin material is plasticized. Further, the screw is moved forward and backward by a servo motor for injection (not shown), and injection of the plasticized molten resin and back pressure control during plasticization are performed. In the present invention, the mechanism of the injection device 14 is not limited, and a hydraulic injection device using a hydraulic cylinder or the like may also be used. Also, the number of injection devices 14 may be two as in the case of the two-color molding die shown in FIG. 3, or may be three or more.

[0017] The injection molding machine 11 is provided with a setting device 26 as shown in FIGS. 1 and 2. The setting device 26 also serves as a display device 27, and the display device 27 is generally composed of a touch panel. Further, the setting device 26 is also provided with a hard switch 28 and a numeric keypad 29 related to the operation of the injection molding machine 11 other than the display device 27 composed of the touch panel. The hard switch 28 includes a manual button 30 for switching to a mode in which an operator performs all operations of the injection molding machine 11, a semi-automatic button 31 for switching to a mode of automatic operation for only one molding cycle, a full-automatic button 32 for continuing automatic operation until the molding cycle of a specified number of shots is completed, and an emergency stop button 33 for stopping semi-automatic operation and full-automatic operation. The part of the display device 27 composed of the touch panel shown in FIG. 2 enables display of various molding conditions related to the injection molding machine 11 and input of changes to the set values of the molding conditions. Also, as shown in FIG. 2, the touch panel may be provided with a manual button 34, a semi-automatic button 35, a full-automatic button 36, and an enter key 37, and may further be provided with a numeric keypad (not shown).

[0018] <Configuration of the control device> The injection molding machine 11 is also equipped with a control device 24. The control device 24 is connected to the mold clamping device 13, the injection device 14, the setting device 26, and peripheral devices such as temperature control equipment outside the injection molding machine 11, and performs sequence control of the injection molding machine 11. The hardware configuration of the control device 24 includes an input / output part (I / O) that transmits and receives signals to and from the mold clamping device 13, the injection device 14, the setting device 26, peripheral devices, etc., a CPU and a timer that are arithmetic parts, a volatile memory and a non-volatile memory that are storage parts, a volatile register that is part of the CPU, or a hard disk, etc. Further, when the injection molding machine 11 uses a servo motor, the control device 24 is configured according to each of the servo amplifiers, etc., and is not necessarily single.

[0019] Next, with reference to FIG. 3, the related part of the present invention in the control device 24 will be conceptually described. Among the control device 24, the setting input / output part 38, the manual output part 39, and the fully automatic output part 40 generally correspond to the input / output part (I / O), and are connected to the mold clamping device 13 and the injection device 14 of the injection molding machine 11 by signal lines to transmit and receive command signals and detection signals. Further, the setting input / output part 38 is connected to the setting device 26 via a signal line, reads the set values set by the operator into the control device 24, and displays the molding conditions stored in the control device 24 and the state of the injection molding machine 11 on the display device 27. The molding condition past data storage part 41 generally corresponds to a non-volatile memory or a hard disk, and the past molding conditions corresponding to each molding die 21 are stored in this part.

[0020] Further, the read molding condition storage unit 42 and the modified molding condition processing unit 43 are generally parts corresponding to the registers or volatile memories of the CPU, and the molding conditions are temporarily stored therein. The manual setting processing unit 44 is generally a part corresponding to the CPU, and it displays on the display device 27 of the setting device 26 the set values of the molding conditions manually set by the operator, the set values of the molding conditions modified from the read molding conditions, etc. Further, it operates the injection molding machine 11 based on the manually set values. Furthermore, the molding condition comparison unit 45 is also generally a part corresponding to the CPU, and it compares the read original molding conditions with the modified new molding conditions, and in some cases, generates an alarm notification or a signal to stop the injection molding machine 11. The alarm notification unit 46 is also generally a part corresponding to the CPU, and it notifies the display device 27 of alarm information corresponding to the alarm signal and generates a warning sound, etc. As described above, part or all of the functions of this control device 24 may be provided outside the injection molding machine 11.

[0021] <Troubleshooting Method at the Time of Molding Condition Change and Operation Start> Next, a method for avoiding troubles at the time of molding condition change and operation start of the injection molding machine 11 will be described with reference to FIGS. 1 to 4. As shown in FIG. 3, when a two-color molding die 21 for injection molding is attached to the injection molding machine 11 for molding a previously molded molded product, the operator operates the setting device 26 to read out the molding conditions used when the molding die 21 is used from the molding condition past data storage unit 41 (s1 in FIG. 4). The read original molding conditions are temporarily stored in a volatile memory or the like, which is the read molding condition storage unit 42. At this time, the read original molding conditions are operation items of almost all the molding conditions required for injection molding, including the molding conditions of the mold clamping device 13, the molding conditions of the injection device 14, the temperature of the molding die 21, and the molding conditions of the core mechanisms 22 and 23 of the molding die 21.

[0022] When only some of the original molding conditions used in the trouble avoidance method are involved at this time, only the specific molding conditions may be read out and temporarily stored in the molding condition storage unit 42 for use in comparison. Specifically, when comparing only the molding conditions related to the movable parts such as the ejector and core of the molding die 21, only the molding conditions of the movable parts of the molding die 21 may be read out and stored in a register or the like of the molding condition storage unit 42. The method of storing the molding conditions of the core mechanism in the register is to assign an address number corresponding to the operation timing and the like and store it. And when the molding conditions are changed, it can be determined that the address number is changed. Or all the molding conditions may be read out and stored in the molding condition storage unit 42 for comparison with the new molding conditions.

[0023] In this embodiment, the fixed die 15 of the molding die 21 is convex and has a fitting convex portion 48 that fits with the second core block 47 of the movable die 17. In addition, an opening of the primary injection sprue 50 and an opening of the secondary injection sprue 51 are provided on the cavity surface 49 of the fixed die 15. The movable die 17 is concave and is provided with a first core mechanism 22 (core mechanism) and a second core mechanism 23 (core mechanism) that protrude and retract with respect to the cavity surface 60, and also includes an ejector mechanism (not shown). The first core mechanism 22 includes a first core block 52 and a hydraulic cylinder 53 that advances and retracts the first core block 52. The second core mechanism 23 includes a second core block 47 and a hydraulic cylinder 59 that advances and retracts the second core block 47.

[0024] The first core mechanism 22 of the molding die 21 has three molding conditions. The molding conditions for the "first operation" of the first core mechanism 22 are: before mold closing: the first core block retracts (continuously), before the first molding after mold closing: the first core block advances, before the second molding after mold closing: the first core block retracts, which are included in the original molding conditions when the operator reads them from the molding condition past data storage unit 41. Also, the molding conditions for the "second operation" of the first core mechanism 22 are: before mold closing: the first core block advances, before the first molding after mold closing: the first core block advances (continuously), before the second molding after mold closing: the first core block retracts. The molding conditions for the "third operation" of the first core mechanism 22 are: before mold closing: the first core block retracts, before the first molding after mold closing: the first core block retracts (continuously), before the second molding after mold closing: the first core block retracts (continuously), and the first core mechanism 22 is not operated during molding.

[0025] On the other hand, the second core mechanism 23 of the molding die 21 also has three molding conditions. The molding conditions for the "first operation" of the second core mechanism 23 are: before mold closing: the second core block advances (continuously), before the first molding after mold closing: the second core block retracts, before the second molding after mold closing: the second core block retracts (continuously), which are included in the original molding conditions when the operator reads them from the molding condition past data storage unit 41. Also, the molding conditions for the "second operation" of the second core mechanism 23 are: before mold closing: the second core block retracts (continuously), before the first molding after mold closing: the second core block advances, before the second molding after mold closing: the second core block retracts. The molding conditions for the "third operation" of the second core mechanism 23 are: before mold closing: the second core block retracts, before the first molding after mold closing: the second core block retracts (continuously), before the second molding after mold closing: the second core block retracts (continuously), and the second core mechanism 23 is not operated during molding.

[0026] In this embodiment, an example in which three molding conditions are stored schematically for the molding conditions of the operations of the core mechanisms 22 and 23 will be described. However, in reality, since the operation sequence and timing of each core mechanism vary widely, the number of molding conditions is much larger. Or, not only the forward and backward movements of the core mechanisms 22 and 23 but also the forward speed, backward speed, forward position, backward position, etc. may be set as operation items of the molding conditions.

[0027] Regarding the molding conditions read out above, they are displayed as shown in Fig. 2(a). That is, for the first core mechanism 22, it is displayed as "First operation", which is the molding condition read out, in the molding condition setting display section 56 of the core mechanism molding condition setting screen 55. Also, for the second core mechanism 23, it is displayed as "First operation", which is the molding condition read out, in the molding condition setting display section 57 of the core mechanism molding condition setting screen 55. According to this molding condition, as shown in Fig. 3(a), before mold clamping (when the mold is open), the first core block 52 has retracted, and the second core block 47 has advanced. And before the first molding after mold clamping, as shown in Fig. 3(b), the first core block 52 advances, and the second core block 47 retracts while being fitted after the fitting convex portion 48 of the fixed mold 15 is inserted into the rear part of the block.

[0028] However, after attaching the molding die 21 to the injection molding machine 11, there may be cases where the operator wants to check the operations of the first core mechanism 22 and the second core mechanism 23 or try to modify the molding conditions before actually performing the automatic molding of the molded product. For example, as shown in the molding condition setting display section 56 of the core mechanism molding condition setting screen 55 in Fig. 2(b), there may be a case where the operator wants to change the molding condition of the first core mechanism 22 to "Third operation" where the first core block 52 does not advance at all. Or, for the second core mechanism 23, as shown in the molding condition setting display section 57 in Fig. 2(b), there may be a case where the operator wants to change the molding condition from the initial "First operation" to "Second operation" where the second core retracts (continuously) before mold clamping. When there are these changes in the molding conditions (s2)=Y, the operator inputs the change to the molding condition of "Third operation" from the part of the molding condition setting display section 56. Also, the operator inputs the change to the molding condition of "Second operation" from the part of the molding condition setting display section 57. The input of the molding conditions is transmitted to the manual setting processing section 44 via the setting input / output section 38. Then, the change process is performed in the manual setting processing section 44, and it is temporarily read as the new molding condition in the changed molding condition processing section 43 (s3). Note that the change of the molding conditions may also be performed by inputting the operation settings such as the set value from the numeric keypad of the touch panel of the setting device 26.

[0029] When the operator no longer needs to operate the setting device 26 to change the molding conditions (s2 = N), the operator presses either the semi-automatic button 35 or the full-automatic button 36 on the touch panel of the setting device 26 to input the start of automatic operation (s4). However, at this time, as shown in FIG. 3(c), if the molding conditions of the first core mechanism 22 are forgotten to be returned from the molding conditions of "third operation" to the original molding conditions of "first operation" and molding is performed, not only will the shape of the primary molded product not become the desired shape, but also problems such as the primary molding material being injected to the side of the secondary sprue will occur. Also, as shown in FIG. 3(c), if the molding conditions of the second core mechanism 23 are forgotten to be returned from the molding conditions of "second operation" to the original molding conditions of "first operation" and molding is performed, the second core block 47 in the retracted position at the time of mold closing will collide with the fitting convex portion 48 of the fixed mold 15, leading to a problem of damage to the molding die 21.

[0030] Regarding the problem of the operator forgetting to return the molding conditions and the set input values included in the molding conditions, the original molding conditions initially read and stored in the registers of the read molding condition storage unit 42 are compared with the new molding conditions after the change temporarily stored in the change molding condition processing unit 43 in the molding condition comparison unit 45 (s5). Only when the two match at this time (s5 = Y), automatic operation is started (s6). Also, when there is no change from the original molding conditions and only the original molding conditions exist and there are no new molding conditions after the change, since there is no change in the address, "there is no difference between the two", so automatic operation is started. In these cases, since the original molding conditions are the molding conditions molded in the past, no major troubles will occur in the injection molding machine 11.

[0031] Also, when the original molding conditions and the new molding conditions are different (s5 = N), an alarm signal is sent from the molding condition comparison unit to the alarm notification unit, and since the molding conditions are changed on the display device 27 of the setting device 26, it is notified that automatic operation cannot be started. An alarm sound may also be generated at this time. Also, for alarm notification (s 7) At the same time, the injection molding machine 11 enters a state where automatic operation is not possible (s8). However, the state where automatic operation is disabled at this time means that automatic operation is at least temporarily disabled, and automatic operation can be started by the method described below.

[0032] When the operator can confirm that there are no problems with the new molding conditions during manual operation, by pressing the automatic operation start button 58 for molding condition update on the molding condition setting screen 55 of the core mechanism for molding conditions (s9), the inability to start automatic operation is released and automatic operation is forcibly started (s6). At this time, it may be possible to double-check the start of automatic operation, such as "Are you sure you want to start automatic operation?" Or you may press the automatic operation start button such as semi-automatic or full-automatic again. If the automatic operation start button 58 for molding condition update is not pressed, the state of inability to perform automatic operation based on the comparison between the original molding conditions and the new molding conditions will continue to work effectively.

[0033] If this state where automatic operation is not possible is valid, it returns to (s2) and changes the new molding conditions to the same state as the original molding conditions (s3). Specifically, in the case of the first core mechanism 22, operate the molding condition setting display section 56 on the molding condition setting screen 55 of the core mechanism to change the molding conditions from "third operation" to "first operation". Or in the case of the second core mechanism 23, operate the molding condition setting display section 57 to change the molding conditions from "second operation" to "first operation". Then perform the automatic operation start input (s4) again. By doing so, in the next (s5), since the new molding conditions after the change have been restored to the same as the original molding conditions (s5 = Y), automatic operation will be started. By incorporating the trouble avoidance method of the present invention into the control device 24, it is possible to avoid the occurrence of troubles in the injection molding machine 11 due to unexpected operations, whether it is at the start of semi-automatic operation or at the start of full-automatic operation.

[0034] In the above, the "new molding conditions" usually refer to the latest molding conditions temporarily stored at the start of automatic operation (at the time of comparison). However, the molding conditions temporarily stored immediately prior to the start of automatic operation may also be the "new molding conditions". In addition, if molding conditions not used for comparison (molding conditions not related to problems with the injection molding machine 11) are saved after important molding conditions (molding conditions related to problems with the injection molding machine 11) used for comparison to determine whether to start automatic operation are saved, or if both are saved at the same time, only the important molding conditions will be the "new molding conditions" used for comparison.

[0035] Alternatively, the ability to update molding conditions using the molding condition update automatic operation start button 58 may be limited to only operators with specific authority. In this case, the operator must have his / her own information read into the injection molding machine 11 when starting up the injection molding machine 11, when reading out molding conditions, or when pressing the molding condition update automatic operation start button 58. This may be done by password entry, ID card entry, or biometric information recognition such as fingerprint, voice, or iris.

[0036] <Example of changing molding conditions for ejector mechanism> Regarding the case where problems occur with the ejector operation when changing the molding conditions and starting the operation of the injection molding machine 11, it will be described with reference to FIG. 5. FIG. 5 shows an example in which the molding conditions of the ejector mechanism 62, which is a movable part of the mold 61, are changed instead of the core mechanisms 22 and 23, which are movable parts of the mold 21 shown in FIG. 3. FIG. 5(a) shows a state where the ejector pin 64 of the ejector mechanism 62 provided on the movable mold 63 has retracted, FIG. 6(b) shows a state where the ejector pin 64 has advanced when the mold is opened, FIG. 6(c) shows a state where the ejector pin 64 has advanced from before mold closing to after mold closing, or a state where the ejector pin 64 has advanced after mold closing. If, for example, after manually advancing the ejector pin 64 at a low speed from the originally read original molding conditions and then forgetting to return it to the stopped state, or changing to molding conditions such as the advancing operation of the ejector pin 64 in the mold-closed state and starting the automatic operation, the ejector pin 64 may collide with the cavity surface 66 of the fixed mold 65, and troubles may occur in the injection molding machine 11 including the mold 61, similar to the case of the core mechanisms 22 and 23. Also, not only in such simple examples, but if the timing of the operations of the ejector mechanism 62 and the core mechanisms 22 and 23 is misaligned and the molding conditions are set, troubles may occur.

[0037] Next, another embodiment will be described with reference to the flowchart of FIG. 6. First, with the change of the mold 21 or the like, the stored molding conditions of the corresponding mold are read out and stored in the molding condition storage unit 42 as the original molding conditions. Next, if there is a change in the molding conditions (s2) = Y, the operator inputs operation setting items such as set values from the touch panel of the setting device 26, or selects and inputs another molding condition. As a result, the newly input molding conditions overwrite the read molding conditions and are stored as the original molding conditions (s3).

[0038] When there is no need to further change the molding conditions (s2 = N), the operator makes an automatic operation start input (s4) by pressing either the semi-automatic button 35 or the full-automatic button 36 on the touch panel of the setting device. In another embodiment at this time, even if the original molding conditions and the new molding conditions do not match, if the deviation between the two is smaller than a certain value (s6 = N), the automatic operation is started (s7). However, if there is a deviation greater than a certain value in the difference between the two (S6 = Y), an alarm is notified (s8) and the start of automatic operation is made impossible (s9). Also, when the start of automatic operation is impossible, the operator can start the automatic operation by pressing the molding condition update automatic operation start input button 58 etc. after confirmation (s10 = Y). At this time, it is desirable to determine a threshold value for each item in advance and judge whether it is within the range based on the threshold value for the determination of the acceptability of the difference between the two.

[0039] Taking an example of another embodiment, in the molding conditions related to injection, the injection stroke (the distance from the injection start position to the pressure holding switching position) is set, but the value may be changed. However, if the injection stroke is set to a significantly large value (when there is a deviation greater than a certain value) when changing the molding conditions, there is a possibility of causing troubles such as overpack. Therefore, when there is a deviation greater than a certain value between the original molding conditions and the new molding conditions regarding the injection stroke, it is desirable not to start the automatic operation. Also, for the moving stroke of the movable mold when closing the mold (the distance from the mold opening completion position to the mold closing completion position), if the automatic operation is started while the value deviated from the original molding conditions is input as the new molding conditions, there is a possibility of causing troubles such as the movable mold colliding with the fixed mold when closing the mold. Therefore, when there is a deviation greater than a certain value between the original molding conditions and the latest molding conditions regarding the mold closing stroke, it is desirable not to start the automatic operation.

[0040] Regarding the above examples, in most cases, the injection molding machine 11 is already protected by the interlock mechanism. However, even in cases where the interlock mechanism is artificially released or the sensor fails, major troubles of the injection molding machine 11 can be prevented.

[0041] <Another further embodiment (1) not shown> Next, another further embodiment (1) will be described. In the above two embodiments, the read molding conditions read from the molding condition past data storage unit 41 are used as the original molding conditions as they are. However, in another further embodiment (1), the original molding conditions may be those further overwritten and saved by the operator with respect to the read molding conditions read from the molding condition past data storage unit 41. Specifically, the original molding conditions may be those created by the operator while referring to the read molding conditions and performing manual setting or manual molding, and then saved as molding conditions without problems after performing manual molding. At that time, the address of the molding conditions stored in the read molding condition storage unit 42 is also rewritten. And when, after saving the original molding conditions, the operator changes the set values and set conditions based on the original molding conditions to further add new molding conditions, and then an automatic operation start input is performed, the original molding conditions overwritten and saved starting from the read molding conditions are compared with the new molding conditions, and if there is a difference or a divergence of a certain degree or more between the two, an alarm is notified or the automatic operation cannot be started.

[0042] <Another further embodiment (2) not shown> Next, another further embodiment (2) regarding the original molding conditions used for comparison will be described. In the above another further embodiment (1), the original molding conditions used for comparison are the read molding conditions read from the molding condition past data storage unit 41 or those temporarily stored in a register or the like of the read molding condition storage unit 42. However, the original molding conditions used for comparison may be those obtained by directly taking out the data stored in the molding condition past data storage unit 41 and using it at the time of comparison.

[0043] <Another further embodiment (3) not shown> In the above-described embodiment, the original molding conditions regarding the past molding conditions stored are compared with the new molding conditions set based on the original molding conditions. When there is a difference or a deviation of a certain degree or more between the two, an alarm is notified or the automatic operation cannot be started. When the two match or the deviation is smaller than a certain degree, the automatic operation is started. However, the present invention compares the original molding conditions regarding the past molding conditions stored with the new molding conditions set based on the original molding conditions, and the new molding conditions are original The operation may be started only when the new molding conditions meet predetermined conditions in terms of the molding conditions.

[0044] Specifically, the molding conditions are such that two or more set values are intricately intertwined, and it may be difficult to determine whether the molding conditions are good or not without considering the relationship between the two or more set values. For example, if the temperature of the heating cylinder is higher, a higher injection speed is possible, but it may not be possible to determine whether the injection speed alone represents the optimal molding conditions. Also, the timing of the ejector operation and the forward speed (including acceleration) may be determined as to whether they are the optimal molding conditions in relation to the mold temperature and the cooling time. Based on these interlocking conditions, determine in advance what range of molding conditions allows the automatic operation to start. Or, after inputting the new molding conditions, calculate whether the automatic operation can be started when the automatic operation start input is made.

[0045] In such a case, AI technology using deep learning or the like may be utilized. That is, when the molding conditions are newly changed with respect to the original molding conditions, within what range, whether the operator inputs the button to release the inoperability of the automatic operation and starts the automatic operation, or whether the new molding conditions have problems and are returned to the original molding conditions, is learned by the AI and the data is accumulated. And eventually, when the new molding conditions are originalIt may be determined by deep learning whether it meets predetermined conditions in terms of forming conditions, and the operation may be started only when the AI determines that it meets the predetermined conditions. Also, when it does not meet the predetermined conditions, the AI may display at least one proposal for suitable forming conditions on the display screen of the display device 27. Further, these learning results can also be referred to the results of other injection molding machines connected directly or via a server or a PC.

[0046] Regarding the present invention, although not enumerated one by one, it is not limited to those of the above-described embodiments, and it goes without saying that it is also applicable to those modified by those skilled in the art based on the gist of the present invention or those obtained by individually combining some parts of the above embodiments.

Explanation of Signs

[0047] 11 Injection molding machine 13 Mold clamping device 14 Injection device 15 Fixed mold 17 Movable mold 21 Forming mold 24 Control device 26 Setting device 27 Display device 55 Core mechanism forming condition setting screen 42 Read forming condition storage unit 43 Modified forming condition processing unit 44 Manual setting processing unit 45 Forming condition comparison unit

Claims

1. A method for avoiding troubles during setting of molding conditions of an injection molding machine, comprising: when an automatic operation start is input, comparing an original molding condition regarding a past saved molding condition with a new molding condition set based on the original molding condition; starting the automatic operation only when there is no difference between them or when there is no new molding condition after change; A method for avoiding troubles of an injection molding machine, which notifies an alarm for all cases where the new molding condition is changed from the original molding condition and there is a difference between them.

2. A method for avoiding troubles during setting of molding conditions of an injection molding machine, comprising: when an automatic operation start is input, comparing an original molding condition regarding a past saved molding condition with a new molding condition set based on the original molding condition; starting the automatic operation only when there is no difference between them or when there is no new molding condition after change; A method for avoiding troubles of an injection molding machine, which makes it impossible to start the automatic operation at least temporarily when the new molding condition is changed from the original molding condition and there is a difference between them, and enables the start of the automatic operation by an operator's input.

3. The start of the automatic operation by an operator's input is realized by changing to the same state as the original molding condition, or by pressing the automatic operation start button again, or by pressing the molding condition update automatic operation start button. The method for avoiding troubles of an injection molding machine according to Claim 2.

4. The molding condition according to Claim 1 or Claim 2 is a molding condition regarding the operation of the core mechanism of the mold. The method for avoiding troubles of an injection molding machine.

5. An injection molding machine for avoiding troubles during setting of molding conditions, comprising: when an automatic operation start is input, comparing an original molding condition regarding a past saved molding condition of the core mechanism of the mold with a new molding condition of the core mechanism of the mold set based on the original molding condition; enabling the start of an automatic operation including at least the operation of the core mechanism of the mold only when the new molding condition is the same as the original molding condition or when there is no new molding condition after change; An injection molding machine that cannot start the automatic operation as it is when the new molding condition is not the same as the original molding condition, and enables the start of an automatic operation including at least the core mechanism of the mold by an operator's input.

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