JPH079524A - Control method of injection molding machine - Google Patents

Abstract

PURPOSE:To contrive drastic elimination or reduction of labor and an improvement in productivity, by a method wherein different products are molded in order in a fixed number of shots at a time while performing an automatic exchange of molds according to a production schedule. CONSTITUTION:A series of molding process is allowed to perform by performing appropriate driving control of a corresponding driving source through a driver group 32 (such as a motor driver or a hydraulically-controlled valve driver or a heater driver) while referring to real time measured information through a sensor group 31 (such as a positional sensor or a pressure sensor or a temperature sensor) and timing information built in itself. In an operatorless operation mode wherein automatic molding operation is allowed to continue while performing automatic mold exchange, an automatic molding operation is stopped once by a mold process control part 45 based on a command through a management control part 43 of a production schedule and automatic molding operation is reopened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control system of an injection molding machine, and in particular, it is possible to successively mold (produce) different products by a predetermined number of shots while automatically changing the mold. The present invention relates to a control system for an injection molding machine.

[0002]

2. Description of the Related Art Recent injection molding machines are designed to execute a continuous molding operation based on preset molding condition data (molding operation condition value) under the control of a microcomputer (hereinafter referred to as a microcomputer). . That is, the operator can specify the type of molding condition data stored in advance in the data memory etc. by key operation, or the operator himself can input each molding operation condition value interactively with the molding condition setting mode screen by key operation. By inputting, in the predetermined condition setting storage area in the microcomputer,
Molding condition data according to the product to be molded next is set, and the microcomputer instructs the operation start by the operator,
The continuous molding operation is executed based on the set molding condition data.

On the other hand, in many cases, manpower is still used for the die replacement performed every time when the type of product to be molded in this type of injection molding machine is changed, and it is troublesome for each die replacement. . Although an injection molding machine system that automates the die change is being developed, the operator gives the instruction for die change each time. Also, every time the mold is replaced (the product type is changed), the operator replaces the molding condition data (molding operation condition value) with this, or instructs the machine's transient operation during mold replacement. It was common to do so.

[0004]

As described above, in the conventional microcomputer-controlled injection molding machine, after the molding condition data (molding operation condition value) corresponding to the product type (in other words, the mold number) is set, Although the automatic continuous molding operation can be executed for this one product type, every time the product type is changed, it is troublesome to replace the mold and set the molding condition data. For this reason, the operator must stand in front of the machine each time the molds are changed frequently, such as when producing a large number of small lots on a single machine (injection molding machine), which saves labor. It was problematic in terms. Also, even if the machine is operated almost at full efficiency to improve the operation efficiency, if the mold replacement timing (timing to change the product to be molded) is outside the operator's working hours, it cannot be dealt with immediately and the productivity does not increase. There was also a problem.

However, there is a strong demand for labor saving and productivity improvement at the molding site (factory), and especially when, for example, all the products which are sequentially molded by exchanging molds use the same resin material. , Production that does not require a purge operation (replacement of resin) every time the mold is changed (that is, removal work of old resin discharged from the nozzle or a mixed resin of old and new resin accompanying the purge operation is not required) Aspects such as mold replacement and molding condition data (molding operation condition value)
There has been a demand for unmanned production of small lots of a wide variety of products by performing all the replacement of the products in a fully automatic manner.

The present invention has been made in view of the above points,
The purpose is to realize a control system of an injection molding machine that can sequentially mold (produce) different products for a predetermined number of shots while automatically changing dies according to a preset production schedule. Therefore, it is intended to achieve significant labor saving and productivity improvement.

[0007]

To achieve the above object, the present invention provides a microcomputer for executing an automatic continuous molding operation based on molding condition data set for each product.
In a control system of an injection molding machine having a die exchanging means for automatically exchanging a die based on a command from the microcomputer, the production schedule in which the number of production shots and the production sequence of each product are stored in the microcomputer. Molding operation condition setting memory in which the setting condition memory unit and the molding condition data corresponding to a predetermined product read out from the product-specific molding condition data storage unit storing a large number of molding condition data for each product are set to be rewritable A function part, a molding process control function part for executing an automatic continuous molding operation based on molding condition data in the molding operation condition setting storage function part, and a production record storage function part for counting and storing the production record of each product, Based on information from the production schedule setting memory function unit and the production result memory function unit, each unit in the microcomputer is controlled to execute continuous production of multiple products. A production schedule management control function unit, and a die replacement control function unit that outputs a control signal for die replacement based on a command from the production schedule management control function unit. The control function unit refers to the count data in the production result storage function unit based on the number of shots planned for production and the production order of each product preset in the production schedule setting storage function unit, and produces a certain product. When the (molding) is completed, the mold replacement means executes the mold replacement for the next product production through the mold replacement control function section, and at the same time, the molding condition data corresponding to the next product is displayed. The data is read from the molding condition data storage means for each product and automatically set in the molding operation condition setting storage function unit, and thereafter, the automatic continuous molding operation of the next product is performed by the molding. Process control function unit production plan depending on the number of shots is performed, the series of processes is to be performed repeatedly until completion production of the set product all.

[0008]

For example, prior to the production (molding) of a large number of small lots, the operator calls the molding schedule setting mode screen on the display device by appropriately operating the key input device. Then, for example, the type (number) of the molding condition data of each product scheduled to be produced using the same resin material although the product type (mold number) is different and the number of shots to be produced are interactively displayed on the molding schedule setting mode screen. Enter in sequence. Further, the production order of each product input and arranged on the molding schedule setting mode screen is appropriately instructed. As a result, the production schedule setting storage function unit in the microcomputer stores the number of production shots and the production order of each product to be produced. After that, when it is confirmed that each part of the machine is in the standby OK state, and the operator instructs the microcomputer to start the fully automatic unmanned operation, the microcomputer executes the control processing according to a predetermined program created in advance and the setting is performed. According to the production schedule, different products are sequentially molded (produced) by a predetermined number of shots while automatically changing the mold.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is an explanatory diagram showing a main configuration of an injection molding machine according to this embodiment, FIG. 2 is an explanatory diagram showing an example of a molding schedule setting mode screen according to this embodiment, and FIG. 3 is processing by a microcomputer according to this embodiment. It is a flowchart figure which shows an example of the flow of 1.

In FIG. 1, 1 is an injection mechanism system,
A heating cylinder 2 having a known screw built-in, a hopper 3 for charging and supplying a resin material into the rear side of the heating cylinder 2 (the rear side of the screw), a nozzle 4 attached to the tip side of the heating cylinder 2, a screw The rotary drive source 5, a forward-backward drive source (not shown), a heater (band heater) 6 wound around the heating cylinder 2 and the nozzle 4, and the like are provided.

Reference numeral 10 denotes a mold opening / closing mechanism system, which is a holding mold 1.
2 is attached to the fixed die plate 11, the mold clamping cylinder 13 is attached to the support plate 14, the holding mold 16 is attached, and the mold clamping cylinder 13 is used for the toggle link mechanism 1.
7 includes a movable die plate 15 and the like which are driven via 7, and a holding side mold 12 is detachably attached with a fixed side die 18 and a holding die 16 is attached with a movable side die 19 respectively. There is.

Reference numeral 20 is a mold exchanging machine attached to the main body of the machine (injection molding machine), 21 is a mold storing means arranged in the vicinity of the mold exchanging machine 20, and the mold storing means 21 has a large number of molds. A mold (a large number of molds each of which is composed of a fixed mold and a movable mold) is stored, and the mold changer 20 causes the mold opening / closing mechanism system 10 to be operated by a command from a microcomputer 30 described later.
The mold removed from the mold is stored in a predetermined position of the mold storage means 21, and the mold changer 20 attaches the mold taken out of the predetermined position of the mold storage means 21 to the mold opening / closing mechanism system 10. There is. Although arbitrary configurations can be adopted for the mold exchanging machine 20 and the mold storing means 21,
In the present embodiment, in order to simplify the mechanism and the control operation, although not shown, for example, the mold storage means 21 is a rotary drum type which accommodates several tens of molds, and a predetermined rotation stop position of the rotary drum. The mold changer 20 is configured to move the mold in and out.

Here, the respective molds used in this embodiment are relatively small, and the mold thicknesses of the respective molds are all unified to the same size. The reason for making the mold thicknesses the same in this way is that the mold thickness adjustment (die height adjustment) is not required during mold replacement, and the incidental control operation accompanying mold replacement is simplified and This is to shorten the exchange time, but recent microcomputer-controlled injection molding machines often have an automatic die height adjustment function, so if you are willing to adjust the die height when changing the die, It is not necessary to unify the mold thickness dimensions of.

In FIG. 1, reference numeral 30 denotes a microcomputer (microcomputer) that controls the operation and display of the entire molding system including the main body of the machine (injection molding machine), the mold changer 20, the mold storage means 21, and the like. A sensor group composed of a large number of sensors provided in each part of the molding system, a driver group 32 composed of a large number of driver circuits for driving and controlling a large number of drive sources arranged in each part of the molding system, Reference numeral 33 is a key input device provided on the front surface of the machine body, and 34 is, for example, a color CRT display or color L provided adjacent to the key input device 33.
The display device is a CD or the like.

In this embodiment, it is assumed that the sensor group 31 and the driver group 32 to be integrated by the microcomputer 30 include the die changer 20 and the sensor group and driver group of the die storing means 21. But
When the mold exchanging machine 20 is a robot with a built-in microcomputer that enables precise operation control, the microcomputer of the mold exchanging machine 20 itself integrally controls the sensor group and the driver group of the mold exchanging machine 20 and the mold storing means 21. However, it is obvious to those skilled in the art that the mold change operation can be performed by the communication between the microcomputer 30 of the machine body and the microcomputer of the mold changer 20.

The microcomputer 30 described above controls the series of molding operations in the automatic continuous molding operation mode, calculates and stores measured data, monitors and judges using monitor data, or operates in an unmanned operation mode. Various processes such as a production schedule management control process and a display control process of an output image of the display device 34 are executed. This microcomputer 30
Are actually various I / O interfaces, ROM, R
Although it is configured with an AM, MPU, etc., and executes various processes by various programs created in advance, in the present embodiment, for convenience of explanation, the production schedule setting storage unit 41 and the product-specific molding condition data storage unit 42. , Production schedule management control unit 43, molding operation condition setting storage unit 4
The following description will be made on the assumption that the apparatus includes a molding process control unit 45, a production result storage unit 46, a mold replacement control unit 47, a display control unit 48, and the like.

The production schedule setting storage unit 41 stores a production schedule in an unmanned operation mode, which is input by an operator using a molding schedule setting mode screen, which will be described later, to continue automatic molding operation while performing automatic die replacement. It is rewritably stored. The data stored in the production schedule setting storage unit 41 is the molding condition number (mold number) indicating the type of molding condition data for each product, the planned number of shots, and the planned production sequence of each product. In the embodiment, schedule data corresponding to 20 molding condition numbers (mold numbers) can be stored, but this number is arbitrary.

Molding condition data (operating condition data) for each of a number of different products is previously stored in the product-specific molding condition data storage section 42 in association with a molding condition number (mold number). The molding condition data (operating condition data) of each molding condition number (mold number) stored in advance in the product-specific molding condition data storage unit 42 is at least the mold (mold) stored in the mold storage means 21. No.) is covered in all. In addition,
As the molding condition data storage unit 42 for each product, the microcomputer 3 is used.
An external storage medium other than the memory in 0 can be used. If the external storage medium is also used in this way, 100 to 100
It becomes possible to easily hold molding condition data with molding condition numbers of several hundreds.

Here, as the contents of the molding condition data (operating condition data), for example, charge (kneading / plasticizing / measuring) control conditions, injection control conditions (primary injection control conditions, holding pressure switching conditions, holding conditions) Pressure control conditions), mold closing and mold clamping force control conditions, mold opening and eject control conditions, temperature control conditions of each part, and the like.

The molding condition data (operating condition data) as described above is rewritably stored and set in the molding operation condition setting storage unit 44, and is used as a control condition value during the automatic continuous molding operation. The molding operation condition setting storage unit 44 stores the molding condition data for each product under the control of the production schedule management control unit 43 in the unmanned operation mode in which the automatic molding operation is continued while performing the automatic die change. Molding condition data (operating condition data) corresponding to a predetermined molding condition number (mold number) read from the storage unit 42 is transferred, stored and set (replacement setting).

The molding process control unit 45, based on the molding process control program created in advance and the setting condition values written in the molding operation condition setting storage unit 44, the sensor group 31 (position sensor, pressure sensor). , The temperature sensor, etc.) while referring to the real-time measurement information and the timekeeping information built into itself, the driver group 3 described above.
A corresponding drive source is appropriately drive-controlled via 2 (motor driver, hydraulic control valve driver, heater driver, etc.) to execute a series of molding steps. The molding process control unit 45 temporarily stops the automatic molding operation based on a command from the production schedule management control unit 43 in the unmanned operation mode in which the automatic molding operation is continued while the automatic mold replacement is performed. , Restart the automatic molding operation.
Further, in the unmanned operation mode in which the automatic molding operation is continued while performing the automatic mold replacement, the molding process control unit 45 controls the production schedule management control unit 43 during the transitional period in which the mold replacement is performed. Based on the signal, a necessary part of the machine is made to perform an incidental operation (a different operation from the normal molding operation) accompanying the die replacement.

The production record storage unit 46 is automatically operated by a signal indicating completion of one shot from the molding process control unit 45 or a signal indicating completion of one shot from a monitor data storage unit (not shown) in the microcomputer 30. The cumulative number of shots made during the molding operation is sequentially counted up and held. Then, in the unmanned operation mode in which the automatic molding operation is continued while performing the automatic mold replacement, the production schedule management control unit 4 is operated every time the mold is replaced.
The content of the production record storage unit 46 is cleared by the signal from the unit 3.

In the unmanned operation mode in which the automatic mold operation is continued while the automatic mold change is performed, the mold replacement control unit 47 controls the driver group 32 based on the command from the production schedule management control unit 43. The mold changer 20 and the mold storing means 21 are driven and controlled via the mold changer 20, and the mold changer 20 causes the mold opening / closing mechanism system 1 of the machine.
The mold attached to 0 is removed and stored in a predetermined position of the mold storing means 21, and then the next mold specified from the mold storing means 21 is taken out by the mold exchanging machine 20. Is attached to the mold opening / closing mechanism system 10.

The production schedule management control section 43 is
It controls the management in the unmanned operation mode in which the automatic molding operation is continued while performing the automatic die change, and refers to the contents of the production schedule setting storage unit 41 and the production result storage unit 46,
Each part in the microcomputer 30 is controlled according to the production schedule set by the operator. That is, the production schedule management control unit 43 produces (molds) a certain product.
When the number of shots to be produced reaches the planned number of shots, a command is sent to the molding process control unit 45 to temporarily stop the automatic molding operation,
Subsequently, the production schedule management control unit 43 sends a control signal to the molding process control unit 45 in accordance with the mold replacement control program created in advance, and the molding process control unit 4
5 causes each part of the machine to perform an operation required for die replacement itself and an operation required during a transition period during die replacement. At the same time, the production schedule management control unit 4
In step 3, the mold change control unit 47 causes the mold change to the next mold according to the production schedule. Further, at the same time, the production schedule management control unit 43
The molding condition data (operating condition data) of the next mold number (molding condition number) according to the production schedule is read from the product-specific molding condition data storage unit 42 and transferred to the molding operation condition setting storage unit 44. Then, the molding condition data (operating condition data) corresponding to the product of the next mold number is replaced and set. Then, at a timing when it is confirmed that the machine can start (restart) the automatic molding operation, the production schedule management control unit 43 sends a command to the molding process control unit 45 to restart the automatic molding operation. The production schedule management control unit 4 performs control processing for continuing the automatic molding operation while performing such automatic die change.
3 is repeatedly executed until the production (molding) of the last product of the set production schedule is completed.

The display control unit 48 responds to an operator's command to call a predetermined display mode screen from the key input device 33, etc., based on a display image creation / control program created in advance, and if necessary, the microcomputer 30. Necessary data is extracted from each part inside to generate designated display mode image data, which is sent to the display device 34,
An image desired by the operator is displayed on the display screen of the display device 34.

FIG. 2 shows an example of a molding schedule setting mode screen which is called by the operator on the display device 34 by appropriately operating the key input device 33. This molding schedule setting mode screen is called to set and input a production schedule, for example, prior to the production (molding) of a small lot and a wide variety of products. In this embodiment, up to 20 product types (mold numbers) can be set on this molding schedule setting mode screen (up to 20 products can be continuously produced). , This number is arbitrary.

Then, the operator interactively interacts with the molding schedule setting mode screen and a number (mold number) indicating the type of molding condition data of each product to be produced.
And the number of shots to be produced are sequentially input. Normally, from the "setup No. 1" on the molding schedule setting mode screen to the required "setup no."
And the number of shots to be produced are sequentially input, and "Molding start setup No." on the molding schedule setting mode screen is "1".
By doing so, the die number, the planned shot number, and the planned production sequence of each product to be produced are stored in the production schedule setting storage unit 41 of the microcomputer 30. The molding start setup number does not necessarily have to be "setup No. 1", and it is also possible to specify an arbitrary one such as "setup No. 3" as shown in FIG. Further, this molding schedule setting mode screen also serves as a production schedule monitor screen for monitoring the degree of progress of production. In the example shown in FIG. 2, unattended automatic continuous molding operation is started from “setup No. 3”. , "In-molding setup No." is "5", it means that the product of "Setup No. 5" is currently being formed, and the number is currently "182 shots" in the "Counter" display field. It means that.

Here, in this embodiment, all the products having the molding condition numbers (mold numbers) set on the above-mentioned molding schedule setting mode screen are unified to products using the same resin material. There is. The reason for doing so is that if all the same resin materials are used, it is not necessary to perform a purging (replacement of resin) operation when the mold is replaced, and the incidental operation at the time of mold replacement can be simplified, and This is because the die replacement time can be shortened.

As described above, after the number of production shots and the production sequence of each product to be produced are stored in the production schedule setting storage unit 41, it is confirmed that each machine unit is in the standby OK state. Then, when the operator instructs the microcomputer 30 to start unattended fully automatic operation, the microcomputer 30 executes a series of control processing operations according to a predetermined program created in advance, and automatically replaces the mold according to the set production schedule. While performing the above, different products are sequentially molded (produced) by a predetermined number of shots.

Next, the control operation by the microcomputer 30 in the unmanned operation mode in which the automatic molding operation is continued while the automatic die replacement is performed will be described with reference to the flowchart of FIG. Step ST1 of FIG. 3 is a processing step when the mold opening / closing mechanism system 10 of the machine is waiting in a state where the mold is opened with the maximum stroke and the mold can be exchanged, and this step ST1 is set. It is asked whether or not there is a molding condition number (mold number) that has not been produced in the production schedule. If YES, the process proceeds to step ST2, and if NO, the production schedule is considered complete and the process proceeds to step ST15. Complete production (end unattended operation mode). In step ST2, the die change operation for the next die is performed according to the production schedule, and after confirming the die exchange in step ST3, step ST
Go to 4. In step ST4, molding condition data for the next mold number (product) according to the production schedule is replaced and set in the molding operation condition setting storage unit 44.

After step ST4, the production schedule management control unit 43 causes the molding process control unit 45 to
Automatic tightening is executed in step ST5, then initial charge is executed in step ST6, and then step S
At T7, the temperature of the heater 6 on the tip side of the heating cylinder 2 is controlled at a temperature corresponding to the molding condition data, and then the nozzle touch is performed in step ST8, and then the machine can perform the automatic molding operation of the next product. After confirming that the state has changed, the process proceeds to step ST9. In step ST9,
When the automatic molding operation is started (restarted) in accordance with the instruction from the production schedule management control unit 43, the automatic molding operation is executed by the molding process control unit 45. Since the initial charge in step ST6 is performed with the tip of the nozzle 4 free (nozzle back), the back pressure of the first charge after the die replacement is normally formed. It is controlled with a value different from the back pressure at the time (What happens is that if the nozzle tip is in a free state, charging (measuring) will not be completed with the back pressure at the time of normal molding, and
This is because the molded product becomes an extremely short shot at no back pressure). When the nozzle is touched and the first shot is charged after the mold is replaced,
The processing in step ST6 can be omitted.

Step S following step ST9 described above
At T10, whether or not the number of shots of the product currently produced (molded) has reached the planned number of shots is determined by referring to the contents of the production schedule setting storage unit 41 and the production result storage unit 46 described above. The schedule management control unit 43 makes a determination. If NO, the process returns to step ST9, and if YES, the production schedule management control unit 43 sends a command to the molding process control unit 45 to suspend the automatic molding operation, and then proceeds to step ST11.

Thereafter, the production schedule management control unit 43
By the molding process control unit 45, step ST11
Then, the temperature of the heater 6 on the tip side of the heating cylinder 2 is controlled at a temperature lower than that at the time of normal molding, then suck back is performed in step ST12, and nozzle back is performed in step ST13. In ST14, the mold is opened with the maximum stroke, and the process returns to step ST1. Here, suck back is performed before nozzle back as described above because resin leakage (drooling) from the tip of the nozzle 4 in the nozzle back state.
This is to prevent the occurrence of. Further, before the suck back, the temperature of the heating cylinder tip side (mainly the nozzle portion) is controlled to be lower than that during normal molding. Even if suck back is performed, if the temperature of the heating cylinder tip side is high, resin leakage may still occur. This is because there is no such thing. As described above, the reason why the resin leakage countermeasures are sufficiently taken as in the present embodiment is that if resin leakage occurs, the resin that sticks to the spherical surface at the tip of the nozzle 4 causes a desired nozzle touch (no nozzle touch with no gap). This is because it cannot be achieved, and it is considered to be a big problem during unmanned operation.

[0034]

As described above in detail, according to the present invention, different products are sequentially molded (produced) by a predetermined number of shots while automatically exchanging molds in an unmanned state according to a preset production schedule. It is possible to realize a control system of an injection molding machine capable of achieving this, and thus, it is possible to achieve significant labor saving and improvement of productivity, and the value thereof is great in this kind of injection molding machine.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a main configuration of an injection molding machine according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing an example of a molding schedule setting mode screen according to an embodiment of the present invention.

FIG. 3 is a flowchart showing an example of the flow of processing by the microcomputer of FIG.

[Explanation of symbols]

 1 Injection Mechanism System 2 Heating Cylinder 3 Hopper 4 Nozzle 5 Screw Rotation Drive Source 6 Heater 10 Mold Opening / Closing Mechanism System 11 Fixed Die Plate 12 Holding Die 13 Clamping Cylinder 14 Support Plate 15 Movable Die Plate 16 Holding Die 17 Toggle Link Mechanism 18 Fixed side mold 19 Movable side mold 20 Mold changer 21 Mold storage means 30 Microcomputer (microcomputer) 31 Sensor group 32 Driver group 33 Key input device 34 Display device 41 Production schedule setting storage unit 42 Molding condition by product Data storage unit 43 Production schedule management control unit 44 Molding operation condition setting storage unit 45 Molding process control unit 46 Production result storage unit 47 Mold replacement control unit 48 Display control unit

Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location B29C 45/26 7158-4F

Claims (7)

[Claims] 1. A microcomputer provided with a microcomputer for executing an automatic continuous molding operation based on molding condition data set for each product, and a mold exchanging means for automatically exchanging a mold according to a command from the microcomputer. In the injection molding machine, when the production (molding) of a certain product is completed, the microcomputer, based on the preset number of shots to be produced and the planned production sequence for each product, sets a die for the production of the next product. While executing the exchange, the molding condition data corresponding to the next product is read out and automatically set, and thereafter, the automatic continuous molding operation of the next product is executed according to the number of shots to be produced, A control system for an injection molding machine, wherein a series of processes is repeatedly performed until production of all the set products is completed. 2. The control system for an injection molding machine according to claim 1, wherein the respective products produced by the automatic die exchange are molded from the same resin material. 3. The control method for an injection molding machine according to claim 2, wherein the molds of the respective molds to be automatically replaced have the same thickness. 4. The production schedule setting storage function unit according to claim 2, wherein the microcomputer stores a production planned shot number and a production scheduled sequence for each product, and molding condition data for each of a large number of products. The molding operation condition setting storage function unit in which the molding condition data corresponding to the predetermined product read out from the product-specific molding condition data storage unit is set to be rewritable, and the molding condition in the molding operation condition setting storage function unit From the molding process control function unit that executes automatic continuous molding operation based on data, the production result storage function unit that counts and stores the production results of each product, and the production schedule setting storage function unit and the production result storage function unit. A production schedule management system that controls each part in the microcomputer based on information to execute continuous production of multiple products A control system for an injection molding machine, comprising: a control unit and a mold replacement control function unit that outputs a control signal for mold replacement based on a command from the production schedule management control function unit. . 5. The injection molding according to claim 2, wherein when production of a certain product is completed, a suck back operation and a nozzle back operation subsequent to the suck back operation are executed before the die replacement. Machine control method. 6. The molding operation according to claim 5, wherein at least a period from the completion of the production of a certain product to the completion of the mounting of the mold for the next product is controlled by the temperature on the head side of the heating cylinder. The control method of the injection molding machine is characterized in that the temperature is controlled to be lower than the temperature. 7. The method according to claim 2, wherein the type of molding condition data set according to each of the products and the corresponding number of production shots and the production order of each product corresponding to the molding condition data are displayed on a display device. An injection molding machine control method characterized in that it can be arbitrarily set by the operator while the molding schedule setting mode screen is being called.