JPH0572249B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a molding condition setting device for an injection molding machine for modifying temporarily set molding conditions according to molding results.

[Prior art and its problems]

Generally, an injection molding machine is equipped with a display such as a CRT, plasma display, LED display, or LCD display, and displays data related to molding conditions set on a setting panel or transferred from an external memory, and the operating status during molding. Displays various molding information such as data.

By the way, in setting molding conditions, for example, in the case of an injection process, a shift point is determined with respect to the screw position, and the speed is set at this shift point. In other words, from the injection start position S1 to the next shift point, position S2, the speed is V1, and the position S2 is
to position S3, which is the next shift point, the speed is set to V2, etc., and each speed point S1, S2 is displayed on the display.
. . . and the corresponding speeds V1, V2, . . . were digitally displayed as they were.

On the other hand, the molding conditions are first tentatively set, and molding is performed based on these tentative settings, and the set values are corrected while observing the molded product so as to obtain the best molded product.

However, in the past, setting values could only be corrected by relying on the molded product as molding information, and in the end, it had to be done by trial and error based on experience and intuition, requiring advanced molding technology and experience, and requiring a great deal of effort. This method requires time and effort, it is difficult to set accurate and optimal conditions, and there are problems in that it requires wasted materials and energy consumption.

[Means for solving problems]

The present invention aims to provide a novel molding condition setting device for an injection molding machine that solves the problems existing in the prior art described above, and is achieved by the device 1 shown below.

That is, the molding condition setting device 1 according to the present invention graphically displays the set values and actual measured values of the molding conditions as change characteristics on the display 2, and also displays a horizontal cursor 3 that is displaced in the vertical axis direction and/or a horizontal cursor 3 that is displaced in the horizontal axis direction. The present invention is characterized in that a vertical cursor 4 that is displaced is displayed on or attached to the display 2, and molding conditions can be set at the position of each cursor 3, 4. In this case, the set value and actual measured value are displayed using the same range.

[Effect]

Next, the operation of the present invention will be explained.

The present invention obtains a molded product based on temporarily set molding conditions, and on the other hand, the molding condition setting device 1 graphically displays the molding conditions of the molded product as changing characteristics. Therefore, the specific molding result (molded product)
At the same time, by displaying the entire cause of the forming as a diagram, you can grasp the correction points, and by displacing the cursor that represents a part of the displayed graph, you can correct the change characteristics and perform forming. Reset the conditions.

〔Example〕

Hereinafter, preferred embodiments of the present invention will be described in detail based on the drawings. Fig. 1 is a block diagram of the control system of an injection molding machine including the molding condition setting device according to the present invention, Fig. 2 is a front view of the display in the temporary setting state of the device, and Fig. 3 is a setting correction of the device. FIG. 7 is a partial front view of the display device afterward.

First, a schematic configuration of a control system in an injection molding machine including a molding condition setting device 1 according to the present invention will be described with reference to FIG.

A sensor 11 for detecting speed and pressure is attached to an injection cylinder, a mold cavity, etc. of an injection molding machine, and this sensor 11 is connected to an operating state detection section 13 via an amplifier 12. This operating state detection section 1
3 includes a slave CPU, RAM, main CPU, etc., and detects the operating state of the injection molding machine to obtain actual measured values of molding conditions. Further, the operating state detection section 13 is connected to the display control section 14 . On the other hand, a display 2, a keyboard 15, and a central controller 16 are connected to the display control section 14, and the actual measured values obtained by the detection section 13 are displayed as a graph on the display 2 as a change characteristic. Further, the keyboard 15 is used to control the displacement and display of the cursors 3 and 4 displayed on the display 2.

On the other hand, a setting panel 17 for setting molding conditions is connected to the central controller 16. Same panel 17
The set values set in are stored in the central controller 16, and are displayed as a graph as a change characteristic on the display 2 via the display control section 14, particularly in a manner superimposed on the graph of the actual measured values.

Furthermore, a drive device 19 such as a hydraulic cylinder or a servo motor is connected to the central controller 16 via a drive control section 18 such as a valve or servo amplifier.

Next, the display device 2 will be explained in more detail with reference to FIG. 2.

The display 2 includes a rectangular graph display section 21 having a horizontal axis (X axis) and a vertical axis (Y axis), and a data display section 22 that utilizes the space around the rectangular graph display section 21. As the display device 2, a CRT, a plasma display, etc., as well as a dot display having a matrix of LEDs are also suitable.

Taking the molding conditions in the injection process as an example, the graph display section 21 shows the screw position S [mm] on the horizontal axis, and on the other hand,
The screw speed V [mm] is displayed on the vertical axis.
Also, for example, from injection start position S1 to position S2, which is the next shift point, the speed is set to V1, from position S2 to position S3, which is the next shift point, the speed is set to V2, and from position S3 to position S4, which is the next shift point. The speed is set to V4 from position S4 to position S5, which is the next shift point, and the speed is set to V4 from position S4 to position S5, which is the next shift point, using the setting panel 17.The molding conditions based on these set values are displayed as graph P1. Graph P shows the actual measured values for the actual operating conditions based on the set values.
It is superimposed and displayed as 2. By superimposing the display in this way, it is possible to easily grasp the extent to which the actual operating state deviates from the set value.

Further, the screw position S and the screw speed V, which are respective set values, are digitally displayed on the data display section 22 on the left side of the graph display section 21.

On the other hand, a horizontal cursor 3 and a vertical cursor 4 are simultaneously displayed on the graph display section 21, and by operating the keyboard 15, the horizontal cursor 3 is displaced in the vertical axis direction, and the vertical cursor 4 is displaced in the horizontal axis direction. . Note that this cursor may be displayed on either side as necessary. Furthermore, although the cursor is directly displayed on the display 2, a cursor formed separately in front of the display 2 may be mechanically slidable. On the other hand, a data display section 22 located on the opposite side to each scale display on the vertical and horizontal axes digitally displays the value at which the cursors 3 and 4 are located at the extension line position of each cursor 3 and 4, This display position follows the displacement of the cursors 3 and 4.
Note that numerals 23 to 27 are function display sections.

Next, a method of setting molding conditions in the injection process will be explained with reference to FIGS. 2 and 3.

First, molding conditions are temporarily set on the setting panel 17 and molding is performed. Note that this provisionally set value is displayed on the display 2 as the speed characteristic corresponding to the shift point, as described above. Further, the screw speed corresponding to the actual screw position is detected by the sensor 11, and the detected actual value is displayed in a superimposed manner on the display 2 in the same range as the set value. FIG. 2 shows the state displayed in this way.

On the other hand, when looking at a molded product molded under temporarily set molding conditions, it is assumed that although the external dimensions are good, flow mark defects occur around the gate. In this case, as is clear from FIG. 2, it can be easily understood that the speed V at the time of passing through the gate is too high and the distance of the speed V2 is shorter than the set value due to the delay. Therefore, press the correction target designation key on the keyboard 15 to specify correction of speed V2, operate the movement key to move the horizontal cursor 3 downward, and adjust the speed to V2, which is slightly lower than speed V2.
Set to . At this time, the corresponding function lamp 24 lights up to indicate that the speed V2 is being corrected. On the other hand, when the speed correction is completed, the user next presses the designation key to designate correction of the position S2, and operates the movement key to move the vertical cursor 4 to the right. This amount of movement is a correction for the delay, that is, in FIG. 2, the speed V2 needs to be switched at the position S2, but it is recognized that there is a slight delay. Therefore, the vertical cursor 4 is set to the right position S20 by a distance corresponding to this delay. At this time as well, the corresponding function lamp 24 lights up to indicate that the position S2 has been corrected.

After the correction, molding is performed using the new, corrected setting values. Graph P3 in FIG. 3 shows the change characteristics based on this corrected setting value.
Therefore, as is clear from Figures 2 and 3,
After changing the set value, the speed decreases and the distance the screw moves forward at that speed also increases. Therefore,
The speed when passing through the gate is sufficiently reduced, and defective products such as flow marks do not occur.

Although the embodiments have been described in detail above, the present invention is not limited to these embodiments.
For example, the horizontal axis on the display section may be any variable such as time in addition to position, and the vertical axis may also be any set value such as pressure in addition to speed. Further, the shape of the cursor does not matter, such as tilting it in accordance with the graph displayed on the display. Furthermore, the display does not interfere with the display of the monitor range and the like for displaying setting limits and the like. Furthermore, the display may be configured to automatically turn off if no setting operation is performed on the setting panel for a certain period of time. Other changes may be made in the detailed structure, shape, arrangement, numerical values, etc., without departing from the gist of the present invention.

〔effect〕

As described above, the molding condition setting device for an injection molding machine according to the present invention displays the set value and actual measurement value of the molding condition on the display as a graph as a change characteristic, and also displays them in the same range and horizontally displaced in the vertical axis direction. By displaying or attaching a cursor and/or a vertical cursor that moves in the horizontal direction, molding conditions can be set at the cursor position.
Obtain the following effects.

At the same time as the specific molding result (molded product), the entire cause of the molding is displayed as a diagram, so correction points can be easily grasped, and molding conditions can be corrected quickly and easily. Therefore, the best molding conditions can be set, the efficiency of setting work can be greatly improved, and the material,
It can contribute to energy savings.

Since the present setting device can be configured by using the existing display device as it is and changing the display mode, cost reduction can be achieved.

If set values and actual measured values are displayed simultaneously in the same range, each value will be displayed in a superimposed manner. As a result, it is possible to easily grasp how much the actual operating state deviates from the set value, so that the set value can be corrected more easily and accurately.

[Brief explanation of the drawing]

Fig. 1: A block diagram of the control system of an injection molding machine including the molding condition setting device according to the present invention, Fig. 2: A front view of the display device in the temporary setting state of the device, Fig. 3
Figure: Partial front view of the display unit after the settings of the device were corrected. In the drawings, 1: molding condition setting device, 2: display, 3: horizontal cursor, 4: vertical cursor.

Claims (1)

[Claims] 1 The set values and actual measured values of the molding conditions are displayed in a graph as change characteristics on the display, and are also displayed in the same range, with a horizontal cursor that moves in the vertical axis direction and/or a vertical cursor that moves in the horizontal axis direction. 1. A molding condition setting device for an injection molding machine, characterized in that the molding condition setting device is displayed on or attached to a device and is configured such that molding conditions can be set at each cursor position.