JPH0617049B2 - Method and apparatus for displaying operating state of injection molding machine - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an injection molding machine, and more particularly to a display method and a display device for displaying and monitoring the current operating state of the injection molding machine.

2. Description of the Related Art An injection molding machine that numerically displays various variables such as a clamp position and a screw position in an injection molding process is known.

In addition, lighting display members such as light emitting diodes are arranged in line,
An operation display plate for an injection molding machine, which displays an injection molding process and various input data depending on its lighting display position, is proposed as Japanese Utility Model Laid-Open No. 58-42874. However, there is a problem that it is difficult to accurately grasp what operation process the injection molding machine is currently in and what its progress is, by simply turning on the light emitting diode. there were.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention According to the present invention, it is possible to easily grasp which process the injection molding machine is currently in, and to sequentially display the progress of operation steps in the process in a graphic form so that the injection molding machine The operation status can be displayed.

MEANS FOR SOLVING PROBLEMS AND ACTION THEREOF The present invention causes the display means of the injection molding machine to display a plurality of concrete pictures showing each aspect of the process operation of the injection molding machine performed in one molding cycle. Further, the operation step of the injection molding machine can be easily identified by graphically displaying the index indicating the operation being executed on the display means in correspondence with the picture of the process operation based on the sequence number being executed. Is to be displayed.

Further, by displaying a plurality of concrete pictures showing each aspect of the operation process in a line at the same time according to the execution order of the process, the flow of the injection molding process can be grasped as a whole, while the operation process being executed Is detected by the sequence number, the line segment length stored in the controller of the injection molding machine corresponding to the sequence number is read, and the start point of the linear index having the line segment length is the operation of the first execution order. The operation process being executed is shown at the end point of the linear index by displaying a graphic on the display means along the plurality of pictures in accordance with the position of the picture of the process, and the completed process and the process being executed. And the steps to be performed from now on can be clearly distinguished.

Further, by detecting the current values of various variables indicating the state of the injection molding machine and displaying them on the display means, it is necessary to check the variables that need to be confirmed regardless of what kind of process is currently being executed. This allows the value of to be checked visually in real time.

Embodiment FIG. 1 is a block diagram of an embodiment of the apparatus to which the method of the present invention is applied. 1 is a mold, 2 is a heating cylinder, 3 is a screw, 4 is a screw rotation driving device for rotating the screw 3. , Driven by the servomotor M3. Reference numeral 5 denotes an export drive device for moving the screw 3 in the axial direction for injection, which is driven by a servomotor M2. A clamp device 6 clamps the die 1 and is driven by a servomotor M1. P1 and P2 are position detectors provided in the servomotors M1 and M2, respectively, and P3 is a rotation speed detector, and each constitutes a part of the variable amount detecting means.

7 to 9 are servo circuits for driving and controlling the servomotors M1 to M3, ST1 is a temperature sensor for detecting the temperature of the mold, SP1 is a pressure sensor for detecting the pressure inside the mold, and S1 is S.
T2 is a temperature sensor for detecting the temperature of the injection nozzle, SP
2 is a pressure sensor for detecting the pressure in the heating cylinder 2, that is, the injection pressure and the back pressure, and ST3 and ST4 are the heating cylinder 2
The signals from the sensors ST1 to ST4, SP1 and SP2 serving as the variable detecting means are converted into digital amounts by the A / D converters 10 to 15 and input to the input circuit 22 of the control device 20. It has been entered.

Reference numeral 21 is a central processing unit (hereinafter referred to as CPU) of a control device in the injection molding machine, 23 is an output circuit, and the servo circuits 7 to
8 is connected. Reference numeral 24 denotes a memory for storing a control program, a RAM for temporary storage or arithmetic processing, a non-volatile memory for storing a line segment length 1 for each sequence number SNO, which will be described later, and the like, which constitutes a storage means. To do. Reference numeral 25 is a manual operation input device for inputting various commands and setting values, 26 is a CRT control circuit for controlling a CRT display device 28 as a display means, and 27 is a bus. In addition, CP
The U21 and the CRT control circuit 26 constitute a main part of the first, second and third display control means.

FIG. 2 shows an example of a screen when the screen of the CRT display device 28 is changed to the operation state display screen. As the operation state display key, the soft key SK1 on the CRT display device 28 is used.
~ When one of SK10 is set and the key is selected,
As shown in FIG. 2, a concrete picture of each operation step of the injection molding process is shown in FIG. 30, and the name 37 of each operation step is displayed below FIG.

The picture for each operation process has figures showing the movable side mold and the fixed side mold, and if necessary, the figures of the screw, heating cylinder, ejector pin, molded product, etc., and these elements. It is provided with a graphic of an arrow indicating the moving direction and the rotation.

The process of closing the clamp which closes the movable side mold from the mold open position (picture at the left end in FIG. 30), the injection step of advancing the screw to inject the molten resin in the mold clamping state (second picture from the left in FIG. 30) ), A pressure-holding step in which a pressing force is applied to the screw to pressurize the filling resin (the third picture from the left in FIG. 30), a cooling / measuring step in which the screw is retracted while rotating the screw in the mold clamping state (left in FIG. 30). (4th picture from FIG. 30), the ejecting step (fifth picture from the left in FIG. 30) for ejecting and dropping the molded product by opening the movable mold and projecting the ejector pin is obvious. It should be noted that the display of the name may be omitted and only the picture may be displayed.

In addition, a linear index 32 indicating the current operation process of the transfer molding machine.
However, starting from the clamp closing process, which is the first process, as shown in FIG.
It is displayed below 0, and the current operation process is notified by specifying the picture by its end point. Second
The example in the figure shows that the injection process is being executed at the present time, and the clamp closing process in which the index 32 is already displayed is the completion process, and the holding pressure in which the index 32 is not yet displayed, The cooling / measurement and eject processes are unexecuted processes.

Further, independently of the picture and the display of the process being executed by the linear index 32, a representative variable among the variables showing the operating state of the injection molding machine (clamp position, screw position, screw pressure, cycle The current values of time, cushion amount, screw rotation speed, nozzle temperature, injection side cylinder temperature, supply side cylinder temperature, etc.) are displayed.

Next, the operation of this embodiment will be described with the operation processing flow shown in FIG.

The injection molding machine has sequence numbers SNO = 1 to SNO = N.
A series of processes from the clamp closing operation to the ejecting operation are sequentially repeated according to the sequence program consisting of, and when the operation status display key is pressed now, the CR
The screen of the T display device 28 is changed to the operation state display screen of FIG. 2, and the CPU 21 first reads the sequence number SNO,
The line length corresponding to the sequence number SNO is stored in the memory 2
4 is read (steps S1 and S2). Next, according to the read line segment length l, the linear index 32 having the line segment length 1 is displayed on the screen of the CRT display device starting from the clamp closing process as the first process (step S3). Next, it is judged whether or not the read sequence number SNO is "1", and "1"
Otherwise, go to step S6, and if "1", timer T
After resetting and restarting, the process proceeds to step S6, in which the read sequence number SN is read.
It is determined whether O is the final sequence number N, and if it is the final number N, the value of the timer T is read and the CRT display device 2
This value is displayed at the cycle time position on the screen of No. 8 (step S7).

Next, the sequence number SNO is the number SN of the weighing start command.
M is determined (step S8), and when it is the number SNM of the measurement start command, the screw value is read from the position detector P2, the cushion amount is calculated, and the cushion amount on the screen of the CRT display device 28 is calculated. This value is displayed at the position (steps S9 and S10). That is, the measurement is started when the pressure holding is completed, and the position of the screw 3 at the time when the pressure holding is completed represents the cushion amount. Therefore, the cushion amount is detected and displayed as described above. Next, the register R is set to "1" (step S11),
The variable corresponding to the value of the register R is read and displayed (steps S12 and S13). That is, when the value of the register R is "1", the clamp position is set, when it is "2", the screw position is set, when it is "3", the screw pressure (injection pressure, back pressure) is set, and when it is "4", it is set. The screw speed,
When "5", the nozzle temperature is detected, when "6", the injection side cylinder temperature is detected, and when it is "7", the supply side cylinder temperature is detected.
Position detector P provided on the servomotor M1 for driving the
1, the screw position is detected by the position detector P2 of the servomotor M2 that drives the injection drive device 5, the screw pressure is detected by the pressure sensor SP2 provided in the injection cylinder 2, and the screw rotation speed is the screw 3
Is detected by a rotation speed detector P3 of a servo motor M3 for rotating the motor, the nozzle temperature is detected by a temperature sensor ST2 provided in the nozzle, the injection side cylinder temperature is detected by a temperature sensor ST3, and the supply side cylinder temperature is It is detected by the sensor ST4. Then, next, "1" is added to the register R (step S14), and if there is no other screen selection signal, the above steps S12 to S15 are performed until the register R becomes "7", and the value of the register R is changed. When the value becomes "7", the processes in and after step S1 are performed again.

As described above, the current operation process is displayed by the picture specified by the end points of the linear index 32, and the value of the representative variable is displayed by the numerical value on the CRT display device. Therefore, the operator can know what operation process the injection molding machine is in in one molding cycle, and even when the operation of the injection molding machine is stopped due to a failure or the like, the operator can know the operation position where the injection molding machine has failed. Is something that can be done.

In the above embodiment, the line segment length corresponding to the sequence number is stored in the memory, the line segment length is read, and the linear index 32 corresponding to the line segment length is displayed as a "clamp closed" picture, that is, the first Although the picture of the operation process is displayed as a line segment that is the display start position and the picture of the current operation process is shown at the end point, each line segment length is programmed in the sequence program,
When the operating state display command is input, the linear index 32 may be displayed on the CRT display device based on the programmed line segment length. Further, although the screw pressure is detected by the pressure sensor SP2 in the above embodiment, the screw pressure may be detected based on the drive current of the servo motor M2 that drives the screw in the axial direction.

EFFECTS OF THE INVENTION Since the present invention changes the position of the index indicating the operation being executed based on the sequence number being executed and displays the graphic corresponding to the picture of the operation process, the skill level of the operator does not change. The current operation process can be accurately grasped, and when a failure occurs, the cause of the failure can be investigated and countermeasures can be taken more quickly and appropriately.

In addition, since the operation currently being executed is displayed by instructing a picture representing the displayed operation step with an index, the completed operation step, the step being executed, and the step to be executed are clearly distinguished. Even if the operator is unfamiliar, it is convenient for grasping the flow of the entire molding process.

Further, since the position of the index indicating the operation being executed is changed based on the sequence number and displayed in correspondence with the picture of the operation process, in particular, the length of the index is changed and displayed based on the sequence number. Therefore, when various operating conditions are set in the same process, for example, when the injection speed or pressure is changed in the injection process and the number of injection stages is set to multiple stages, Since it can be displayed strictly, it is convenient for investigating the operating status, cause of failure, etc.

[Brief description of drawings]

FIG. 1 is a block diagram of an apparatus according to one embodiment of the method of the present invention, FIG. 2 is an example of a display screen of a display apparatus in the embodiment, and FIG. 3 is an operation processing flow. 1 ... Mold, 2 ... Heating cylinder, 3 ... Screw,
10-15 ... A / D converter, M1-M3 ... Servo motor, P1, P2 ... Position detector, P3 ... Rotation speed detector.

Continuation of the front page (56) Reference JP-A-49-135095 (JP, A) JP-A-53-146082 (JP, A) Actually developed Shou-58-42874 (JP, U)

Claims (5)

[Claims] 1. A display means of an injection molding machine displays a plurality of concrete pictures showing respective modes of operation steps of the injection molding machine executed in one molding cycle, and based on a sequence number being executed. A method for displaying an operation state of an injection molding machine, wherein the position of an index for instructing an operation being executed is changed so as to be graphically displayed on the display means in correspondence with a picture of an operation process. 2. A display means of an injection molding machine displays a plurality of concrete pictures showing respective modes of operation steps in a line at the same time according to the execution order of the steps, and detects the operation being executed by a sequence number. , The line segment length stored in the controller of the injection molding machine corresponding to the sequence number is read,
The start point of the linear index having the line segment length is aligned with the position of the picture of the operation process of the first execution order, the display means is graphically displayed along the plurality of pictures, and executed at the end points of the linear index. The operation state display method for an injection molding machine according to claim 1, wherein a picture of an operation step is shown. 3. The operating state of the injection molding machine according to claim 1, wherein the present values of various variables indicating the state of the injection molding machine are detected and displayed on the display means. Display method. 4. A display means capable of performing graphic display, a plurality of concrete picture shapes showing respective modes of operation steps of the injection molding machine, and a display position of each picture determined according to the execution order of each step. A storage unit that stores a display start position of the linear index and a line segment length corresponding to each sequence number of each operation, and a first unit that reads the plurality of pictures from the storage unit and displays them at a predetermined position of the display unit. Display control means,
A sequence number detecting means for detecting the sequence number of the operation being executed at every predetermined cycle, and a linear index is displayed on the display means based on the line segment length corresponding to the detected sequence number and the display start position. An operating state display device for an injection molding machine, comprising: a second display control means. 5. A variable detecting means for detecting current values of various variables indicating the state of the injection molding machine, and a third display control means for displaying the value of the variable detected by the detecting means on the display means. The operation state display device for an injection molding machine according to claim 4, further comprising: