JPH0533131B2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention enables teaching of operation switching positions such as eject position, core pull position, injection speed switching position, injection pressure switching position, etc. of a molded product in an injection molding machine. Regarding injection molding machines.

Prior Art In an injection molding machine, the position of the movable plate that sets the core in the mold, ie the core set position, and the position of the movable plate that pulls out the core from the mold, ie the core pull position, are determined by the position of the product to be molded with the mold. The core set position, core pull position, eject position for removing the molded product from the mold, and overtravel limit position of the mold clamping device are set, and the mold clamping device is controlled based on these set values. There must be. Furthermore, during injection, the injection speed switching position, injection pressure switching position, metering switching position, overtravel limit position, etc. must be set according to the position of the screw, and injection control must be performed based on these settings.

In conventional injection molding machines, the operation position or operation switching position is manually set or programmed in advance. However, this method has the disadvantage that setting work is difficult and it is not easy to change settings.

In addition, the above operation position and operation switching position are temporarily set using the up-down switch, and the set values are displayed in conjunction with the display, and when the desired set values are obtained, these numerical data are stored in the memory as molding data. A control device for an injection molding machine that allows registration has been proposed in Japanese Patent Application Laid-Open No. 158237/1983. However, the settings desired by the operator are not necessarily the appropriate settings; for example,
There are three-plate molds in which the mold and core are linked to drive the stripper plate in synchronization with the movement of the movable plate, and metal molds in which the runner cutting device is driven in synchronization with the movement of the movable plate. In the case of molds, etc., if the mold clamping device is driven with an inappropriate operating position set, there is a risk of damage to the mold or the mold clamping device. Unexamined Japanese Patent Publication 1987
- For injection molding machines equipped with a control device that stores test data for basic molding operations, such as the control device for an injection molding machine proposed as No. 158237, the injection molding machine is run dry using this test data. By doing this, you can check to some extent whether or not there are any abnormalities in the injection molding machine itself, but when mounting molds with different dimensions and structures and setting the core set position, core pull position, eject position, etc., it is necessary to drive the injection molding machine with test data. Similar to setting the operating position inappropriately, this may also cause damage to the mold or mold clamping device.

Problems to be Solved by the Invention The present invention is to enable the injection molding machine to easily and safely set each operation start position and operation position during the mold clamping process, injection/metering process as described above. .

Means for solving the problem FIG. 1 is a block diagram of the means for solving the above problem, in which A is a teaching mode selection means, B is a teaching item selection means, C is a teaching command means, G is a mold clamping or injection driving means, F is a manual feeding means that drives the mold clamping or injection driving means G with a manual switch, and H is a movable platen or screw that is moved by the mold clamping or injection driving means G. A position detecting means for detecting the position, E is a teaching position memory means for storing the display position, and D is a teaching item selection means B which is set to the teaching mode by the teaching mode selection means A, and a teaching item is selected and input. , the present invention is a teaching control means for storing a position signal detected by the position detecting means H in the teaching position memory E when a teaching command is input from the teaching command means C;
The above problems are solved by providing these means in the injection molding machine.

Operation: The operator switches the injection molding machine to the teaching mode using the teaching mode selection means A, inputs the teaching items to be taught from the teaching item selection means B, and controls the mold clamping or injection driving means using the manual feeding means F. When the movable platen or screw is manually fed by driving, and the movable platen or screw is positioned at the teaching position to be set, a teaching command is input from the teaching command means C, and the teaching control means D adjusts the position of the movable platen or the screw. A position signal from a position detector H that detects the rotational position of the motor in the driving means is stored in the teaching position memory E, and the teaching position of each teaching item is stored.

Embodiment FIG. 2 is a block diagram of an embodiment of the present invention.
1 is a mold fixed to a movable plate; 2 is a mold fixed to a fixed plate; 3 is a toggle mechanism that moves the movable plate from side to side in FIG. 2; M1 is a servo motor that drives the toggle mechanism 3; P1 is a position detector such as a pulse coder attached to the servo motor M1, 4 is a screw that performs injection, 5 is a heating cylinder, and M2 is a servo that moves the screw 4 to the left in FIG. 2 to perform injection. A motor, P2 is a position detector such as a pulse coder attached to the servo motor M2, 6 is a servo circuit for driving and controlling the servo motor M1, and 7 is the servo motor M2.
10 is a control device for controlling the injection molding machine, 11 is a central processing unit (hereinafter referred to as CPU), and 12 is a ROM or arithmetic processing unit that stores a control program for the injection molding machine. 13 is an input/output circuit connected to various actuators and detectors, but only the parts related to the present invention are shown in FIG. The input/output circuit 13 is connected to the servo circuits 6 and 7 described above. 14 is a counter that reversibly counts the output pulses from the position detector P1, 15 is a counter that reversibly counts the output pulses from the position detector P2, and 16 is a CRT control circuit to which the CRT display device 8 is connected. . 9
is a manual input device installed on the operation panel, etc.
Teaching mode of the injection molding machine, each selection button to select the operation mode, each teaching item displayed on the CRT display device 8, such as eject position, core pull position, core set position, overtravel limit position of the mold clamping mechanism, injection speed switching Buttons for moving the cursor to select teaching items such as position, injection pressure switching position, metering switching position, screw overtravel limit position, etc.
(Selection buttons may be provided for each teaching item without displaying it on the display device) and manual buttons and teaching positions for manually advancing and retracting the servo motors M1 and M2 for mold clamping and injection. A teaching button, etc., are provided.

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

First, when the operator presses the teaching mode selection button from the manual input device 9 to enter the teaching mode,
The CRT8 contains items to be taught, such as eject position, core pull position, core set position, overtravel limit position of the mold indicating mechanism, injection speed switching position,
Items such as injection pressure switching position, metering switching position, screw and overtravel limit position are displayed (step S1). Next, when the operator moves the cursor to select a teaching item, the CPU 11 reads the selected item (step S2). Next, if the operator gives instructions related to the mold clamping mechanism, that is, the eject position, core pull position, core set position, and overtravel limit position, the servo motor M1 that drives the toggle mechanism 3, which is the mold clamping mechanism, is manually advanced. , press each manual button to retract,
CPU 11 detects it (steps S3, S4)
Move the servo motor M1 forward (step S6) and backward (step S5) until the teaching button is turned on (step S7) above steps S3 to S6.
Repeat this process. In this way, when the movable platen is positioned by manually driving the servo motor M1,
When the operator presses the teach button and turns it on, the CPU
11 detects it (step S7) and counter 1
4 is read (step S8), and the value is stored in the address location of the selected item in the memory 12 (step S9). That is, as the servo motor M1 moves forward or backward, pulses are generated from the position detector P, and the counter 14 adds the pulses if the direction is forward and subtracts the pulses if the direction is backward. The position of the movable platen to which the mold 1 is attached is stored in , and the position of the selected item is taught and stored in the address position of the memory 12 for the selected item. Thereafter, it is determined whether the teaching mode selection button has been turned OFF (step S10), and if it has not been turned OFF, the process from step S2 onwards is repeated to perform the teaching operation of the next selected teaching item.

In addition, teaching related to the injection operation is performed in the same way. Select the teaching item in step S2, press the manual button to manually move the injection motor M2 forward or backward, move the screw forward or backward, and scale the The screw position is detected by , and when the screw reaches the teaching setting position, the teaching button is pressed (steps S3 to S7), and each teaching position indicated by the value of the counter 15 is stored in each address of the memory 12. Then, when the setting of the display position of each teaching item is completed and the teaching mode selection button is turned off (step S10), the teaching ends.

Effects of the Invention As described above, the present invention enables manual operation to drive the screw of a mold clamping device or injection device, and when the movable platen or screw is positioned at a position where a certain operation is to be performed or at a position where the operation is to be switched. , just by inputting teaching commands, the injection molding machine can set the eject position, core pull position, core set position,
Positions such as injection speed switching position and injection pressure switching position can be set.

Therefore, the operator can perform setting operations while visually checking the movement status of the movable platen and mold, and can prevent damage caused by careless movement of the mold clamping device and mold. You can enter accurate setting values. In addition, input of set values is allowed only when the safety of the mold clamping device and injection mechanism is guaranteed, and input and storage of set values are performed directly between hardware elements based on commands from the teaching command means. This eliminates all errors in setting operations caused by mistakes in data reading or switch operation, making it easy, convenient, and efficient to adjust the operation of the injection molding machine when changing molds. can do well.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of means for solving problems according to the present invention, FIG. 2 is a block diagram of an embodiment of the present invention, and FIG. 3 is an operational processing flow of the same embodiment. M1, M2... Servo motor, P1, P2...
Position detector, 1, 2...Mold, 10...Control device.

Claims (1)

[Scope of Claims] 1. Teaching mode selection means, teaching item selection means, teaching command means, mold clamping driving means, manual feeding means for driving the mold clamping driving means with a manual switch, and said mold clamping driving means. a position detection means for detecting the position of the movable platen moved by the means; a teaching position memory means for storing the teaching position; and the teaching mode selection means sets the teaching mode, and the teaching item selection means selects and inputs the teaching item. an injection molding machine, the injection molding machine having a teaching control means for storing a position signal detected by the position detection means in the teaching position memory when a teaching command is input from the teaching command means. 2. A teaching mode selection means, a teaching item selection means, a teaching command means, an injection driving means, a manual feeding means for driving the injection driving means with a manual switch, and detecting the screw position moved by the injection driving means. a teaching position memory means for storing the teaching position, a teaching mode is set by the teaching mode selection means, a teaching item is selectively inputted by the teaching item selection means, and a teaching command is inputted from the teaching commanding means. The injection molding machine has a teaching control means for storing a position signal detected by the position detection means in the teaching position memory. 3 teaching mode selection means, teaching item selection means, teaching command means, mold clamping driving means, manual feeding means for driving the mold clamping driving means with a manual switch, and a movable device moved by the mold clamping driving means. movable platen position detection means for detecting the position of the plate; injection driving means; manual feeding means for driving the injection driving means with a manual switch; and screw position detection means for detecting the position of the screw moved by the injection driving means. a teaching position memory means for storing the teaching position; when the teaching mode is set to the teaching mode by the teaching mode selecting means, a teaching item is selected and input by the teaching item selecting means, and a teaching command is input from the teaching commanding means; An injection molding machine comprising a teaching control means for storing a position signal detected by the movable platen position detection means or the screw position detection means in the teaching position memory.