JP3971317B2 - Molding machine control method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a molding machine control method in which a control amount is corrected when a monitoring target detected for each shot is out of a monitor range.
[0002]
[Prior art]
In general, when a molded product (product) is produced by an injection molding machine, the quality of the molded product is determined. If a defective product is generated, control of a control object related to the occurrence of the defective product in the injection molding machine is performed. By controlling the amount, the molded product is controlled to be a non-defective product. As this type of control method, an injection molding machine disclosed in Japanese Patent Publication No. 4-81930 and Japanese Patent Publication No. 5-55291 is disclosed. The control method is known.
[0003]
In the former control method, an allowable range based on an upper limit value and a lower limit value is set for a physical quantity that affects molding quality, and the number of times the actual measured value of the physical quantity deviates continuously from the allowable range is counted. If it reaches, the control amount of the control means that changes the physical quantity in the next cycle is corrected by a preset correction amount, and sudden disturbances that do not require correction and changes in the molding environment that require correction over time are corrected. This makes it possible to correct accurately. In the latter control method, a monitor range for the most advanced position of the screw, a correction amount for the control amount for controlling the holding pressure for changing the most advanced position of the screw, and a limit value for the controlled amount are set in advance. The most advanced position of the screw in each molding cycle is detected, and when the detected most advanced position of the screw is outside the allowable range of the monitor range, the most advanced position of the screw in the next molding cycle is in the direction to enter the monitor range. The correction is performed by adding or subtracting the correction amount to the control amount.
[Patent Document 1]
Japanese Examined Patent Publication No. 4-81930
[Patent Document 2]
Japanese Patent Publication No. 5-55291
[0004]
[Problems to be solved by the invention]
However, the conventional control method described above has the following problems to be solved. That is, at the time of correction, correction for a predetermined control amount (control target) is performed with a fixed correction amount, but usually there is no clear correlation between the variation of the molded product and the control amount. Therefore, it is not easy to find out what influences, such as control value, measurement value, injection pressure, back pressure, injection speed, speed-pressure switching position, etc. on the variation of the molded product. The shape of the product, the type of resin, and other factors also have an effect, so even if the control amount of the control target selected by the skilled operator is determined to be most correlated, the occurrence of defective products is greatly improved. It may not be done.
[0005]
Thus, even an experienced operator cannot easily select a control target to be corrected corresponding to a defective product. In the end, such selection requires trial and error work, which increases time loss, making it impossible to perform efficient selection work. And the adverse effects on the uniformity of the molded product will also increase.
[0006]
The present invention solves such problems existing in the prior art, and can easily and efficiently select a control target to be corrected in response to a defective product, and is an unskilled operator. However, an object of the present invention is to provide a molding machine control method capable of quickly selecting an appropriate control target.
[0007]
[Means for Solving the Problems and Embodiments]
The control method of the molding machine M according to the present invention monitors the monitoring target detected for each shot, and if the monitoring target is outside the monitor range Zm set by the monitor upper limit value Lu and the monitor lower limit value Ld, the control amount is set. At the time of correction, a plurality of correction items X1, X2, and X3 with priorities are set in advance, and a correction upper limit value Au and a correction lower limit value Ad that allow correction are set for each correction item X1,. In some cases, correction is performed by a predetermined correction item X1... According to the order, and when the correction by the correction item X1... Reaches the correction upper limit value Au or the correction lower limit value Ad, correction processing is performed by the correction item X2. Is performed sequentially.
[0008]
In this case, according to a preferred embodiment, the plurality of correction items X1, X2, and X3 can be arbitrarily selected and set from a preset correction item list, and the correction item list includes, as correction items, At least injection speed, injection pressure, holding pressure, back pressure, screw rotation speed, speed-pressure switching position (VP switching position), measured value, mold temperature, heating cylinder temperature, nozzle temperature, hot runner temperature Can be included. Further, the correction process can be performed by selecting a normal mode that is performed only once for each correction item X1... And a rotation mode in which the correction items X1. In this normal mode, when the correction by the last correction item X3 reaches the correction upper limit value Au or the correction lower limit value Ad, display processing for displaying a corresponding message can be performed. Further, in the correction processing, the monitor shot number N (N1, N2, N3...) For the shot is set in advance, and the monitoring target deviates from the monitor upper limit value Lu and the monitor lower limit value Ld for each monitor shot number N during molding. The number of defects Eu and Ed are counted, and the ratios of the number of defects Eu and Ed to the number of monitor shots N are obtained as output frequencies Ku (= Eu / N) and Kd (= Ed / N), and preset unit correction values A correction amount can be obtained by calculating Aou, Aod and the output frequencies Ku, Kd, and the control amount can be corrected by this correction amount. Note that the in-mold pressure Pc of the mold C provided in the molding machine M can be applied to the monitoring target.
[0009]
【Example】
Next, preferred embodiments according to the present invention will be given and described in detail with reference to the drawings.
[0010]
First, the configuration of the control device 1 capable of performing the control method according to the present embodiment and the schematic configuration of the injection molding machine M on which the control device 1 is mounted will be described with reference to FIGS. 3, 5, and 6.
[0011]
In FIG. 3, the schematic configuration of the injection molding machine M is indicated by a virtual line. The injection molding machine M includes a machine base Mb, and an injection device Mi and a mold clamping device Mc installed on the machine base Mb. The injection device Mi includes a heating cylinder 2, an injection nozzle that does not appear in the drawing at the front end of the heating cylinder 2, and a hopper 3 that supplies material to the rear of the heating cylinder 2. The mold clamping device Mc is provided with a mold C composed of a movable mold and a fixed mold. On the other hand, a side panel 4 is erected on the machine base Mb, and a display 5 such as a color liquid crystal display having a touch panel attached to the side panel 4 is disposed.
[0012]
Further, the control device 1 is mounted on the injection molding machine M. The control device 1 includes a control device body 10, and a mold internal pressure sensor 11 attached to the mold C is connected to the control device body 10. The mold pressure sensor 11 can detect the mold pressure Pc of the mold C.
[0013]
FIG. 5 shows a block system diagram of the control device 1. The control device 1 has a computer function for executing various control processes and arithmetic processes. Reference numeral 12 denotes a CPU, and an internal memory such as a RAM 14 and a ROM 15 is connected to the CPU 12 via a bus line 13. In this case, the RAM 14 is managed by the CPU 12 and functions as a working memory. The ROM 15 stores a control program for executing the control method according to the present embodiment.
[0014]
On the other hand, the above-described mold pressure sensor 11 is connected to the bus line 13 via an interface 16, and a display (touch panel) 5 is connected via an input interface 17 and an output interface 18. Various sensors and various switches are connected to the input interface 17. Thus, injection pressure, holding pressure, back pressure, screw position (injection speed, speed-pressure switching position (VP switching position)), screw rotation speed (measured value), mold temperature, heating cylinder temperature, nozzle temperature , Various detection signals Si relating to the hot runner temperature and the like are inputted. Further, various actuators are connected to the output interface 18. As a result, various command signals (control signals (control amounts)) So ... are output to the corresponding actuators.
[0015]
On the other hand, the display (touch panel) 5 displays the correction screen Va of FIG. 6 used in the control method according to the present embodiment. Thus, various setting information F... Such as the number N of monitor shots, the monitor upper / lower limit value, the correction upper / lower limit value, the unit correction value, etc. can be input from the correction screen Va.
[0016]
Next, a control method according to the present embodiment will be described according to the flowchart shown in FIG. 1 (FIG. 2) with reference to FIGS.
[0017]
First, the control method according to the present embodiment determines whether or not a molded product is good, and if the molded product is defective, tries to correct a control amount related (correlated) to the defect. In the present embodiment, the in-mold pressure Pc of the mold C detected from the in-mold pressure sensor 11 is used as the quantity (monitoring target) for determining the quality of the molded product. By using the in-mold pressure Pc directly related to the molded product, the quality of the molded product can be accurately determined. Therefore, as shown in FIG. 4, in the control device main body 10, the monitor range Zm for the mold internal pressure Pc (detection value) detected for each shot is set in advance by the monitor upper limit value Lu and the monitor lower limit value Ld. In this case, the monitor upper limit value Lu and the monitor lower limit value Ld can be arbitrarily set by an operator observing an actual molded product. Thereby, if the detected mold pressure Pc is within the monitor range Zm, it is judged good, and if any of the monitor upper limit value Lu and the monitor lower limit value Ld is deviated, it is judged defective.
[0018]
On the other hand, the correction screen Va shown in FIG. 6 displayed on the display 5 has both an input function by the touch panel and a display function by the display 5. The correction screen Va includes a correction upper limit value field D1 for setting and displaying a correction upper limit value Au that allows correction for a predetermined control amount, and a setting of a correction lower limit value Ad that allows correction for a predetermined control amount. Correction lower limit value field D2 for display, correction item field D3 for setting and displaying correction item (correction target), data field D4 before correction for displaying data (control amount) before correction, and in-mold pressure Pc is the monitor upper limit value Setting and display of the unit correction value Aou used for correction when the unit correction value Aou used for the correction when Lu deviates from the upper limit correction value column D5 for performing the setting and display of the unit correction value Aou deviates from the monitor lower limit Ld. The lower limit correction value field D6 for performing correction, the start / stop selection button D7 for selecting start or stop of correction processing, and the correction mode selection button for selecting and displaying the normal mode or the rotation mode 8 and a monitor shot count column D9 or the like for setting and displaying the monitor shot number N. In this case, the six columns from the correction upper limit value field D1 to the non-lower limit correction value field D6 have three display parts (setting parts) 1 to 3, and these are the three selected correction items X1, X2, and X3. Corresponding to
[0019]
Next, a procedure for inputting setting information when performing the control method according to the present embodiment using the correction screen Va will be described. First, a correction item is set using the correction item column D3 (step S1). In this case, the correction item column D3 has three display parts (setting parts) assigned with rank numbers from the top. At the time of setting, the correction item list is displayed in a window on the correction screen Va by touching the top display section. As correction items, for example, “injection speed”, “injection pressure”, “holding pressure”, “back pressure”, “screw rotation speed”, “speed-pressure switching position (VP switching position)”, “ “Measurement value”, “mold temperature”, “heating cylinder temperature”, “nozzle temperature”, “hot runner temperature”, etc. can be applied.
[0020]
Then, the operator selects the correction item X1 determined to have the most relationship (correlation) with respect to the mold internal pressure Pc from the correction item list by touch. As a result, the selected correction item X1 is displayed on the top display section. In the embodiment, “injection pressure” is set as the correction item X1. Similarly, in the second display section from the top, the correction item X2 determined to have the second relationship (correlation) with respect to the mold pressure Pc can be set, and similarly, the third display section from the top is displayed. Can set the correction item X3 determined to have the third relationship (correlation) with the mold internal pressure Pc. In the embodiment, “holding pressure” is set as the second correction item X2, and “back pressure” is set as the third correction item X3. Thus, since the operator can select any correction item X1,... From the correction item list, the experience and intuition of the operator can be reflected.
[0021]
Next, various setting information F ... is input (step S2). In the following, a case where setting information corresponding to the correction item X1 is input will be described. However, the other correction items X2 and X3 can be input in the same manner as in the case of the correction item X1. In this case, the order of the three display units in each of the columns D1 to D6 corresponds to the order of the correction items X1, X2, and X3.
[0022]
First, the correction upper limit value Au in the correction upper limit value column D1 is set. In this case, the numeric keyboard is displayed in a window on the correction screen Va by touching the top display portion of the correction upper limit column D1. Therefore, the operator can input the correction upper limit value Au by touching the set number. In the embodiment, “70” is input. As a result, a correction upper limit Au of 70 [%] is set and displayed on the display unit. In this case, the set value is a percentage with respect to the maximum injection pressure. Similarly, the setting of the correction lower limit value Ad (in the embodiment, “30 [%]”) in the correction lower limit value column D2, the unit correction value Aou (in the embodiment, “−5 [%]”) in the non-upper limit correction value column D5 And a unit correction value Aod (“+5 [%]” in the embodiment) in the correction value field D6 outside the lower limit can be respectively set. The data before correction (in the example, “50 [%]”) is displayed in the pre-correction data column D4.
[0023]
Further, the normal mode or the rotation mode is selected by the correction mode selection button D8. In this case, if the normal mode is selected, one correction process is performed for each of the correction items X1 to X3, and if the rotation mode is selected, the correction process for the correction items X1 to X3 is repeatedly performed. When selecting, the correction mode selection button D8 is touched to display both “normal” and “rotation” characters, so that the selected mode is displayed when either one is touched. In the embodiment, the rotation mode is selected. The rotation mode has an advantage that, for example, when the molding is continued for a long time, the control amount can be sequentially set and changed in response to a temperature change or the like, and the normal mode is related to the internal pressure Pc (monitoring target) (correlation). This can be used when searching for correction items with).
[0024]
Further, the monitor shot number N is set by the monitor shot number column D9. In the embodiment, “5” is set as the number N of monitor shots. In this case, since the operation is not stable at the initial stage of molding, the numerical value is decreased to increase the number of corrections per unit time, and the correction amount (frequency) is increased, and if the operation is stabilized, the numerical value is increased. Frequent correction can be avoided and the correction amount (frequency) can be reduced.
[0025]
Then, to start the correction process, start is selected by the start / stop selection button D7 (step S3). The selection method in this case is the same as the correction mode selection button D8. Thereby, the correction process with respect to the correction item X1 (injection pressure) is first performed (step S4). Hereinafter, the correction process for the correction item X1 (injection pressure) will be described with reference to the flowchart shown in FIG.
[0026]
First, the mold internal pressure Pc (detection signal) detected for each shot by the mold internal pressure sensor 11 is applied to the control device main body 10 (step S21). On the other hand, the control device body 10 determines whether or not the applied mold pressure Pc is within the monitor range Zm (step S22). At this time, when the monitor upper limit value Lu or the monitor lower limit value Ld is deviated, the number of defects Eu or Ed deviating from the monitor upper limit value Lu or the monitor lower limit value Ld is distinguished and counted (step S23). This count is executed by a counter function by software and is performed for each shot. When detection for each shot reaches the set number of monitor shots N, each count value is taken and the counter value of the counter function is reset (steps S24 and S25).
[0027]
FIG. 4 shows an example in which the in-mold pressure Pc (detected value) detected for each shot is plotted in time series. N1, N2, N3, N4. Shown in order. In this case, the first monitor shot number N1 indicates that the defect number Eu deviating from the monitor upper limit value Lu is 1 and the defect number Ed deviating from the monitor lower limit value Ld is 1, and the next monitor shot number N2 is It indicates that the number of defects Ed deviating from the monitor lower limit value Ld is 3, and that the next monitor shot number N3 is all within the monitor range Zm.
[0028]
On the other hand, the following processing is performed on the acquired count value. First, when the counter value is zero, that is, when the mold pressure Pc is all within the monitor range Zm as in the monitor shot number N3 shown in FIG. 4, the correction process is not performed and the process proceeds to the next shot. (Steps S26, S33, S21...)
[0029]
Further, when the counter value is out of both the monitor upper limit value Lu and the monitor lower limit value Ld as in the monitor shot number N1 shown in FIG. 4, the control is not stable. Display processing for displaying a message is performed (steps S26, S27, S28). The message in this case is a message that prompts confirmation of setting of the molding condition or setting of the monitor range Zm. Thus, the operator can easily know that the control is not stable, and can quickly confirm the setting of the molding condition or the setting of the monitor range Zm. In this case, the molding operation may be stopped or continued.
[0030]
Further, when the counter value is out of only the monitor lower limit value Ld (or the monitor upper limit value Lu) as in the monitor shot number N2 shown in FIG. 4, the correction item X1 (injection pressure (control amount)) is corrected. Perform correction processing. In the correction, first, the ratio of the defect number Ed (or Eu) to the monitor shot number N is obtained as an output frequency Kd = Ed / N (or Ku = Eu / N). Then, the obtained output frequency Kd = Ed / N (or Ku = Eu / N) is multiplied (calculated) by a preset unit correction value Aod (or Aou) to obtain a correction amount (step S29). Specifically, in the case of the embodiment, since N = 5, Ed = 3, and Aod = + 5 [%], the output frequency Kd is Kd = Ed / N = 3/5. Therefore, the correction amount is Kd × Aod = (3/5) × (+5) = + 3 [%].
[0031]
Then, it is determined whether or not the control amount by the correction reaches the correction upper limit value Au (or the correction lower limit value Ad). If the control amount is within the correction upper limit value Au (or the correction lower limit value Ad) even after correction, Correction for the correction item E1 (injection pressure (control amount)) is performed. That is, the injection pressure is set and changed by correction (steps S30 and S31). Specifically, in the case of the embodiment, since the pre-correction data is 50%, the injection pressure is set and changed to 50 [%] + 3 [%] = 53 [%] by the correction. In this case, since the correction upper limit value Au is 70 [%], 53 [%] ≦ 70 [%] and correction is performed.
[0032]
On the other hand, when the control amount exceeds the correction upper limit value Au (or the correction lower limit value Ad) due to the correction, the correction is stopped and changed to another correction process. That is, the process proceeds to the correction process by the next correction item X2 (steps S32, S5, S6). For example, in the embodiment, when the pre-correction data is 68 [%], the correction is 71 [%], so 71 [%]> 70 [%] and no correction is performed. Thereby, the operator can easily know that the correction item X1 and the mold internal pressure Pc have no correlation.
[0033]
By the way, when performing correction, if the output frequency Kd (or Ku) is 5/5, correction of +5 [%] is performed, and if the output frequency Kd (or Ku) is 1/5, +1 [ %] Is corrected. That is, when the frequency within which the mold internal pressure Pc deviates from the monitor range Zm is high, the correction value (correction amount) increases correspondingly, so that the mold internal pressure Pc deviating from the monitor range Zm quickly enters the monitor range Zm. In addition, when the frequency of deviating from the monitor range Zm is low, the correction value (correction amount) decreases correspondingly, and fine correction can be performed with high accuracy. Therefore, it is not necessary to set the unit correction value Aod (or Aou) strictly, and the setting for the unit correction value Aod (or Aou) can be facilitated and speeded up.
[0034]
On the other hand, when the process proceeds to the correction process using the correction item X2, the same correction process as that of the correction item X1 described above is performed (step S7). In this case, the control amount to be corrected is the holding pressure. If the mold pressure Pc does not enter the monitor range Zm even by the correction process using the correction item X2 (holding pressure) and the control amount exceeds the correction upper limit value Au or the correction lower limit value Ad due to the correction, the correction is stopped. Further, the process proceeds to the correction process by the correction item X3, and the same correction process as that of the correction item X1 described above is performed (steps S8, S9, S10). In this case, the control amount to be corrected is the back pressure. If the mold pressure Pc does not enter the monitor range Zm even by the correction process using the correction item X3 (back pressure), and the control amount exceeds the correction upper limit value Au or the correction lower limit value Ad due to the correction, the correction is stopped. Then, the following processing is performed according to the selected correction mode (steps S11 and S12).
[0035]
That is, when the normal mode is selected, the correction items X1 to X3 are not included in the monitor range Zm even though a series of correction processes are executed for the correction items X1 to X3. This means that there is no relationship (correlation). Therefore, in this case, the molding is stopped and a display process for displaying the corresponding message is performed (step S13). The message in this case is a message indicating that there is no correlation among the selected three correction items X1 to X3 and prompting selection of a new correction item. Thereby, the operator can reset the correction items other than the correction items X1 to X3 and perform the same correction process. Since such processing is performed in the normal mode, it can be used particularly when searching for correction items related (correlated) to the in-mold pressure Pc (monitoring target) in the initial stage of molding.
[0036]
On the other hand, when the rotation mode is selected, the process proceeds to the correction process by the correction item X1 again, and the same correction process is repeated thereafter (step S14). Therefore, in the rotation mode, the correction process using the three correction items X1 to X3 is repeated. For example, when molding is continued for a long time, even if there is a temperature change such as morning and night, this temperature change can be handled. Thus, the control amount can be set and changed sequentially. Note that if the mold internal pressure Pc enters the monitor range Zm in the course of the correction process and continues to remain within the monitor upper limit value Lu and the monitor lower limit value Ld, the state at that time remains displayed on the correction screen Va. Therefore, the operator can know which correction item the mold pressure Pc has a correlation with.
[0037]
Therefore, by using such a control method, selection of a control target to be corrected corresponding to a defective product is automatically performed, so that the control target can be easily and efficiently selected. Moreover, since it is performed automatically regardless of whether the operator is skilled or not, even an unskilled operator can quickly select an appropriate control target, which contributes to improved yield during molding and improved uniformity of molded products. it can.
[0038]
Although the embodiments have been described in detail above, the present invention is not limited to such embodiments, and the detailed configuration, numerical values, quantities, methods, and the like can be arbitrarily set within the scope of the present invention. Can be changed, added or deleted. For example, although three cases of correction items to be selected are exemplified, two or four or more correction items may be selected. Moreover, although the in-mold pressure Pc has been exemplified as the monitoring target, it can be similarly applied to other monitoring targets such as the screw most advanced position, and any molding machine other than the injection molding machine (generally includes a machine tool). ) Can be applied.
[0039]
【The invention's effect】
As described above, the molding machine control method according to the present invention sets a plurality of correction items with priorities, and sets a correction upper limit value and a correction lower limit value that allow correction for each correction item. During the molding, the correction is performed by a predetermined correction item according to the order, and when the correction by the correction item reaches the correction upper limit value or the correction lower limit value, the correction process for correcting by the correction item of the next order is sequentially performed. There are the following remarkable effects.
[0040]
(1) Since selection of a control target to be corrected corresponding to a defective product is automatically performed, selection of the control target can be easily and efficiently performed.
[0041]
(2) Even an unskilled operator can quickly select an appropriate control target, which can contribute to improvement in yield during molding and improvement in uniformity of molded products.
[0042]
(3) According to a preferred embodiment, if a plurality of correction items can be arbitrarily selected and set from a preset correction item list, the experience and intuition of the operator can be reflected.
[0043]
(4) According to a preferred embodiment, if the normal mode in which the correction process is performed only once for each correction item and the rotation mode in which the correction items are sequentially rotated according to the order can be selected, the normal mode is: The rotation mode can be used to search for correction items having a relationship (correlation) with the monitoring target, and the control amount can be sequentially set and changed in response to a temperature change or the like when molding is continued for a long time.
[0044]
(5) According to a preferred embodiment, if the mold internal pressure of the mold provided in the molding machine is applied as a monitoring target, the quality of the molded product can be accurately determined.
[0045]
(6) According to a preferred embodiment, the number of monitor shots for a shot is set in advance in the correction process, and the number of defects whose monitored object deviates from the monitor upper limit value and the monitor lower limit value is determined for each monitor shot number at the time of molding. Counting and calculating the ratio of the number of defects to the number of monitor shots as the output frequency, calculating the correction amount by calculating the preset unit correction value and the output frequency, and correcting the control amount by this correction amount, monitoring When the frequency at which the target deviates from the monitor range is high, the correction amount (correction value) increases correspondingly, so that the monitoring target deviating from the monitor range can be quickly put into the monitor range, and the monitor range. If the frequency of deviation from the frequency is low, the correction amount (correction value) is correspondingly small, so fine correction can be performed with high accuracy. wear.
[Brief description of the drawings]
FIG. 1 is a flowchart showing a processing procedure of a control method according to a preferred embodiment of the present invention;
FIG. 2 is a flowchart showing another processing procedure of the control method;
FIG. 3 is a schematic configuration diagram of an injection molding machine equipped with a control device that implements the control method;
FIG. 4 is a plot diagram of mold internal pressure detected for each shot in the same control method;
FIG. 5 is a block circuit diagram of a control device that implements the control method;
FIG. 6 is a correction screen image displayed on the display of the control device;
[Explanation of symbols]
M molding machine (injection molding machine)
Lu monitor upper limit
Ld Monitor lower limit value
Zm Monitor range
X1 ... Correction item
C mold
Pc type internal pressure
N1 ... Number of monitor shots

Claims (7)

  In the control method of the molding machine that monitors the monitoring target detected for each shot and corrects the control amount if the monitoring target deviates from the monitor range set by the monitor upper limit value and the monitor lower limit value, priorities were assigned. A plurality of correction items are set, a correction upper limit value and a correction lower limit value that allow correction are set for each correction item, and correction is performed with predetermined correction items according to the above ranks at the time of molding. When the correction upper limit value or the correction lower limit value is reached, correction processing for correcting the correction items according to the correction items of the next order is sequentially performed.   2. The method of controlling a molding machine according to claim 1, wherein the plurality of correction items are arbitrarily selected and set from a preset correction item list.   The correction item list includes at least injection speed, injection pressure, holding pressure, back pressure, screw rotation speed, speed-pressure switching position, measurement value, mold temperature, heating cylinder temperature, nozzle temperature, hot runner as correction items. 3. The method for controlling a molding machine according to claim 2, comprising two or more of the temperatures.   2. The molding machine control method according to claim 1, wherein the correction process can select a normal mode that is performed only once for each correction item and a rotation mode in which the correction items are sequentially rotated according to the order.   5. The molding machine according to claim 4, wherein in the normal mode, when the correction by the last correction item reaches the correction upper limit value or the correction lower limit value, display processing for displaying a corresponding message is performed. Control method.   The correction process sets the number of monitor shots for the shot in advance, and counts the number of defects in which the monitoring target deviates from the monitor upper limit value and the monitor lower limit value for each monitor shot number during molding, The ratio of the number of defects to the number of monitor shots is obtained as an output frequency, a correction amount is obtained by calculating a preset unit correction value and the output frequency, and the control amount is corrected by the correction amount. Item 2. A method for controlling a molding machine according to Item 1.   2. The molding machine control method according to claim 1, wherein the monitoring target is an in-mold pressure of a mold provided in the molding machine.

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