JPH0691716A - Graphic display of operation state in injection molding machine - Google Patents

Abstract

PURPOSE:To easily grasp the operation process during execution of an injection machine. CONSTITUTION:A picture 30 showing the operation of an injection molding machine is displayed on the display means provided to the injection molding machine. During the operation of the injection molding machine, an index 32 showing an operation state is moved according to the operation sequence number of the injection molding machine to move the picture and the operation during execution is displayed by the picture. Since the operation process during execution is displayed by the picture, the operation state is easily grasped and this method is convenient in the persuit of the cause at the time of the generation of trouble or abnormality.

Description

Detailed Description of the Invention

[0001]

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 capable of displaying and monitoring the current operating state of the injection molding machine.

[0002]

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.

Further, an operation display plate for an injection molding machine, in which lighting display members such as light emitting diodes are arranged in line and the process of injection molding and various input data are displayed according to the lighting display position, is actually opened. It is proposed in Japanese Patent No. 42874. However, by simply turning on the light emitting diode, this display board can accurately grasp what operation process the injection molding machine is currently in, and what its progress is like. There is a problem that it is difficult.

[0004]

SUMMARY OF THE INVENTION The present invention sequentially displays the progress of the operating process in a graphic form so that the operating process of one molding cycle of the injection molding machine can be easily grasped. The operation state of the injection molding machine can be displayed.

[0005]

A picture showing the operation of the injection molding machine is displayed on the display means of the injection molding machine, and the operation being executed is shown according to the progress of the sequence operation of one molding cycle of the injection molding machine. By moving the above picture, it is possible to immediately grasp the operation process currently being executed.

[0006]

The injection molding machine repeatedly executes the molding cycle, and as each operation of the molding cycle progresses, the picture displayed on the display means is moved so as to show the operation being executed. Therefore, by observing this picture, the operation progress state of the injection molding machine can be grasped.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram of an apparatus according to an embodiment 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 drive device for rotating the screw 3. Then, it is driven by the servomotor M3. 5
Is an injection drive device that moves the screw 3 in the axial direction for injection, and 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 servo motors M1 and M2, respectively.
Is a position detector provided in the above, P3 is a rotation speed detector,
Each constitutes a part of the variable 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 in the mold, and ST2 is an injection nozzle. A temperature sensor for detecting the temperature, SP2 is a pressure sensor for detecting the pressure in the heating cylinder 2, that is, an injection pressure or a back pressure, and ST3, ST4 are temperature sensors for detecting the temperature of the heating cylinder 2, which serve as the variable detecting means. Sensors ST1 to ST4, SP1, S
The signal from P2 is converted into a digital amount by the A / D converters 10 to 15 and input to the input circuit 22 of the control device 20.

Reference numeral 21 is a central processing unit (hereinafter referred to as CPU) of a control device in the injection molding machine, and 23 is an output circuit, which is connected to the servo circuits 7-8. Reference numeral 24 is a ROM for storing a control program, an RA for temporary storage and arithmetic processing.
M is a memory composed of a non-volatile memory or the like that stores a line segment length L for each sequence number SNO, which will be described later, and constitutes a storage means. 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. The CPU 21 and the CRT control circuit 26 have the first and second
It constitutes a main part of the second and third display control means.

FIG. 2 shows an example of the screen when the screen of the CRT display device 28 is changed to the operation state display screen. Among the soft keys SK1 to SK10 on the CRT display device 28, the operation state display keys are shown. When one is set and the key is selected, as shown in FIG. 2, concrete pictures 30 and 32 of each operation step of the injection molding process are displayed, and the name 37 of each operation step is displayed.

The picture for each operation step has figures showing the movable side die and the fixed side die, and further, if necessary, figures such as a screw, a heating cylinder, an ejector pin, a molded product, and the like. An arrow graphic indicating the moving direction and rotation of the element is provided. The process of closing the clamp from the mold open position to close the movable mold (picture at the left end), the injection process of advancing the screw to inject the molten resin in the mold clamped state (the second picture from the left), the pressing force on the screw A pressure-holding process that pressurizes the filling resin by applying a pressure (the third picture from the left), a cooling and measuring process that moves backward while rotating the screw in the mold clamping state (the fourth picture from the left), and a movable mold. The ejecting process (fifth picture from the left) of opening and ejecting the ejector pin to eject and drop the molded product is obvious. It should be noted that the display of the name may be omitted and only the picture may be displayed.

A picture of the linear index 32 showing the current operation process of the injection molding machine is displayed starting from the clamp closing process which is the first process, and the current operation process is notified by the end points. is there. The example in FIG. 2 shows that the injection process is currently being executed, and the clamp closing process in which the index 32 is already displayed is the completed process. Further, the pressure holding, cooling / measuring, and ejecting processes for which the index 32 is not yet displayed are unexecuted processes.

Further, independently of the display of the process being executed by the picture including 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 time,
The current values of the cushion amount, screw speed, nozzle temperature, injection side cylinder temperature, supply side cylinder temperature, etc.) are displayed.

Next, the operation of this embodiment will be described with reference to the operation processing flow of FIG. The injection molding machine has a sequence number SN
A series of processes from the clamp closing operation to the ejecting operation are sequentially repeated according to the sequence program consisting of O = 1 to SNO = N, and when the operation status display key is pressed, the screen of the CRT display device 28 is displayed as shown in FIG. Instead of the operation state display screen, the CPU 21 first reads the sequence number SNO and reads the line segment length L corresponding to the sequence number SNO from the memory 24 (steps S1 and S1).
2). Next, according to the read line segment length L, the linear index 32 having the line segment length L is displayed on the screen of the CRT display device starting from the clamp closing process as the first process (step S).
3). Next, the read sequence number SNO is "1".
It is determined whether or not it is not "1", the process proceeds to step S6.
If it is "1", the timer T is reset and restarted, and then the process proceeds to step S6. In step S6, it is judged whether or not the read sequence number SNO is the final sequence number N. The value of the timer T is read and this value is displayed at the position of the cycle time on the screen of the CRT display device 28 (step S7).

Next, it is judged whether or not the sequence number SNO is the number SNM of the weighing start command (step S8),
If it is the number SNM of the weighing start command, the position detector P2
Read the value of the screw from the
This value is displayed at the position of the cushion amount on the screen of the RT display device 28 (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), and the amount 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, and when the value of the register R is "2", the screw position is set.
When "3", the screw pressure (injection pressure, back pressure)
When it is "4", the screw rotation speed, when it is "5", the nozzle temperature, when it is "6", the cylinder temperature on the injection side,
When the value is "7", the cylinder temperature on the supply side is detected and displayed. The clamp position is detected by the position detector P1 provided in the servomotor M1 that drives the clamp device 6, and the screw position is detected by the injection drive device 5. It is detected by the position detector P2 of the driving servo motor M2, the screw pressure is detected by the pressure sensor SP2 provided in the injection cylinder 2, and the screw rotation speed is detected by the rotation speed detector P3 of the servo motor M3 that rotates the screw 3. The temperature of the nozzle is detected by the temperature sensor ST2 provided in the nozzle, the temperature of the cylinder on the injection side is detected by the temperature sensor ST3, and the temperature of the supply side cylinder is detected by the temperature sensor ST4. Then, "1" is added to the register R (step S14), and if there is no other screen selection signal, the above step S1 is performed until the register R becomes "7".
The processes of 2 to S15 are performed, and when the value of the register R becomes "7", the processes of step S1 and thereafter are performed again.

As described above, the current operation process is displayed by the end points of the picture of the linear index 32 that moves as the operation process progresses, and the value of a typical variable is a numerical value C.
It will be displayed on the RT 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 picture of the first operation process is displayed as a line segment with the display start position, and the picture of the current operation process is shown at the end points thereof. However, each line segment length is programmed in the sequence program. When the operation 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.

[0019]

According to the present invention, the picture displayed on the display means moves in accordance with the molding operation of the injection molding machine to display the operation process currently being executed. Therefore, regardless of the skill level of the operator, It is possible to accurately grasp the operation process of, and when a failure occurs, the cause of the failure can be investigated and countermeasures can be taken more quickly and accurately.

[Brief description of drawings]

FIG. 1 is a block diagram of an example device according to the method of the present invention.

FIG. 2 is an example of a display screen of a display device in the embodiment.

FIG. 3 is an operation processing flow.

[Explanation of symbols]

 1 Mold 2 Heating Cylinder 3 Screw 10-15 A / D Converter M1-M3 Servo Motor P1, P2 Position Detector P3 Rotation Speed Detector

Claims (1)

[Claims] 1. A picture showing the operation of the injection molding machine is displayed on the display means of the injection molding machine, and the picture is displayed so as to show the operation being executed according to the progress of the sequence operation of one molding cycle of the injection molding machine. Method for displaying operating state in injection molding machine that moves a machine.