JPH0698654B2 - Injection molding machine with molding condition protection function - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an injection molding machine with a molding condition protection function, which prevents molding conditions from being set to inappropriate values.

2. Description of the Related Art In an injection molding machine equipped with a control device such as a numerical control device, while performing an injection molding cycle according to a processing program, it is necessary to set and input the variable, that is, the value of a molding condition through an operation panel with a CRT display device. It is publicly known that it is provided in the. In this case, the molding condition can be changed even during the execution of the injection molding cycle, and the molding condition can be set to a more suitable value without stopping the operation of the injection molding machine, which is convenient. However, the operation panel for inputting molding conditions is generally arranged so that anyone can easily operate, and if molding conditions are set to inappropriate values or molding conditions that have already been set to appropriate values, There is a possibility that the value may be changed to an inappropriate value due to negligence or the like, and in this case, there arises a problem that a good product cannot be manufactured.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention The present invention prevents the occurrence of defective products due to the molding conditions being initially set or changed to improper values,
An object of the present invention is to provide an injection molding machine with a molding condition protection function that prohibits improper settings while maintaining the ease of setting molding conditions.

Means for Solving the Problems In an injection molding machine in which the molding conditions can be modified and changed during execution of the injection molding operation, the present invention provides values and passwords for various molding conditions, as shown in FIG. An input means A for manually inputting a code, a temporary storage means B for storing input values of one or more molding conditions input by the input means A, and a nonvolatile memory for storing a preset password. When the password storage means C, the nonvolatile molding condition storage means D that stores the setting value of the molding condition to be executed, the code input from the input means A, and the password stored in the password storage means C match. Only, the control means E for updating and storing the input values of one or more molding conditions stored in the temporary storage means B as the set values in the molding condition storage means D and correcting the molding conditions. It has the same structure.

The input values of the one or more molding conditions input via the action input means A are stored in the temporary storage means B. After entering the molding conditions, enter the password code through the input means A.
The control means E determines whether or not the input code and the password stored in advance in the password storage means C match. Only when the entered code and the password match, the control means E collectively stores in the molding condition storage means D the input values of one or more molding conditions stored in the temporary storage means B as set values to be executed. To update and store. If they do not match, updating of the molding conditions in the molding condition storage means D is prohibited.

Embodiment FIG. 2 shows a main configuration of an injection molding machine according to an embodiment of the present invention. The injection molding machine is equipped with a numerical controller (hereinafter referred to as NC device) 1 incorporated in a computer for injection and clamping. The NC device 1 is provided to drive and control each axis servo motor and various actuators (not shown) for screw rotation, ejector, etc., and the NC device 1 is a numerical control microprocessor (hereinafter referred to as NC CPU) 10 and a program controller. Microprocessor 20 (hereinafter, referred to as CPU for PC).

The NC CPU 10 is connected to a ROM 11 that stores a management program that controls the injection molding machine as a whole and a RAM 12 that temporarily stores data during various types of arithmetic processing. The servo circuit (not shown) for each axis is connected via the
Is a RO that stores the sequence program of the injection molding machine.
The M21 and the RAM 22 for holding data are connected. A bus arbiter controller (hereinafter referred to as BAC) 31 connected to both CPUs 10 and 20 via a bus has a backup power source and various control programs for controlling various operations of the injection molding machine. A non-volatile shared RAM 32 as a storage means for storing a predetermined password including a molding condition and a secret code is connected via a bus, and a value for the molding condition and a code (password) are input. An operator panel controller (hereinafter referred to as OPC) 34 to which a manual input operation panel with a CRT display device (hereinafter referred to as MDI / CRT) 33 as an input means is connected, an input circuit 35 and an output circuit 36 via a bus. Each is connected. Although not shown, various actuators and the like are connected to both the circuits 35 and 36.

Next, the operation of the injection molding machine will be described with reference to FIG.

FIG. 3 shows a molding condition setting control program executed by the PC CPU 20 shown in FIG. 2. First, the CPU 20 executes MDI / C.
Determine whether the RT33 input keys have been operated (step
301), if the input key is not operated, the process returns to step 301 to enter the standby state. On the other hand, when the input key is operated, the input data, that is, the molding condition is temporarily held in the RAM 22, for example (step 302), while the CPU 20 causes the BAC 31 and the OPC 34 to operate.
A password input instruction display command is issued to the MDI / CRT33 via the MDI / CRT33, and a password input instruction message is displayed on the CRT screen 33a by the drawing control of the built-in microprocessor of the MDI / CRT33 (step 303). To restart timer T (step 30)
Four).

Next, the CPU 20 determines whether or not the code as the password is input (step 305), and when the code is input by a series of input key operations, the CPU 20 as the determination means
Compares the input code with a predetermined password previously stored in a predetermined storage area of the shared memory 32 (step 306). If the input code passes the predetermined password, the RAM 22 is stored. The input data temporarily held is stored in the shared RAM 32 as a molding condition to be executed by a conventionally known DMA transfer via the BAC 31 (step 30).
7).

On the other hand, if it is determined in step 305 that the code has not been input, the process proceeds to step 308 to determine whether or not the timer T has timed out, that is, whether or not a predetermined period has elapsed, and the time has not yet expired. If not, the process returns to step 305 to wait for the input of the code. Then, when the timer T times up without inputting a code,
After clearing the input data held in RAM22, that is, the set molding conditions and invalidating them (step 309),
This program ends. If it is determined in step 306 that the entered code does not match the predetermined password, then in step 309 the input data is cleared and the program ends.

Further, in the above embodiment, the multi-microprocessor type NC
Although the injection molding machine equipped with the apparatus has been described, the present invention is applicable to various injection molding machines.

EFFECTS OF THE INVENTION The injection molding machine with the molding condition protection function of the present invention allows the update setting of the set value of the molding condition to be executed only when the password input by the input unit matches the password of the password storage unit. The setting value of the inappropriate molding condition is set as the molding condition for the drive control of the injection molding machine by an inexperienced operator who does not memorize the password, or the drive control once set is set. It is possible to prevent mistakes such as accidentally tampering with the setting values of the appropriate molding conditions for
Even an inexperienced operator can perform an appropriate injection molding operation by using the set values of the appropriate molding conditions stored in the nonvolatile molding condition storage means.

Further, once the molding conditions manually input by the input means are stored in the temporary storage means, it is confirmed whether the passwords match or not, and only when the passwords match, the molding conditions of the temporary storage means are changed to the nonvolatile molding conditions. Since the storage means is updated and stored as the molding condition to be executed, the value of the molding condition of the item that needs to be changed is set in advance in the temporary storage means, and by inputting an appropriate password, The molding conditions stored in the temporary storage means can be collectively updated and set in the molding condition storage means as execution targets. Therefore, when it is necessary to update and set the molding conditions while performing the injection molding work on the injection molding machine, it is necessary to change the setting of the molding conditions for a large number of items. Even if it takes a lot of time, it is possible to smoothly switch the molding conditions. That is, until the input operation of the molding condition to the temporary storage means is completed, the injection molding work similar to that can be performed by the molding condition stored in the nonvolatile molding condition storage means. When the confirmation of the password is completed, the plurality of molding conditions stored in the temporary storage means are collectively transferred to the molding condition storage means, and the drive control of the injection molding machine according to the updated set molding conditions is immediately started. Therefore, stable injection molding work can be performed.

In particular, when changing the molding conditions, only one molding condition may be changed in some cases, but rather the set values of a plurality of related molding conditions are changed in many cases. When the related molding conditions are changed, if the set values are changed one by one, the set values of other related molding conditions may be the values before correction during the change process, which causes an excessive amount in the injection molding operation. It may cause addition or malfunction.
In the present invention, since the set values of the related molding conditions are collectively corrected, the above-mentioned problem does not occur.

Further, according to the present invention, since the set value of the molding condition can be corrected while executing the injection molding operation, when the molding condition is set, the set value of the molding condition is sequentially corrected while performing the molding operation. It suffices to perform the condition setting, and the molding condition setting operation can be performed easily and efficiently.

[Brief description of drawings]

FIG. 1 is a diagram showing means for solving the problems according to the present invention, FIG. 2 is a configuration diagram of a main part of an injection molding machine according to an embodiment of the present invention, and FIG. 3 is a CPU for PC of FIG. 5 is a flowchart of a control program for setting molding conditions, which is executed by. 1 ... Numerical control device, 10 ... Numerical control microprocessor, 11 ... ROM, 12 ... RAM, 20 ... Program controller microprocessor, 21 ... ROM, 32 ... Shared R
AM, 33 ... MDI / CRT.

Claims (1)

[Claims] 1. An injection molding machine adapted to correct and change molding conditions during execution of an injection molding operation, input means for manually inputting values of various molding conditions and codes as passwords, and the input means. Temporary storage means for storing input values of one or more molding conditions input by
A non-volatile password storage means for storing a preset password, a non-volatile molding condition storage means for storing a setting value of a molding condition to be executed, and a code input from the input means and a password storage means. Only when the entered password matches the input password, the input values of the one or more molding conditions stored in the temporary storage means are updated and stored in the molding condition storage means as set values, and a control means for correcting the molding conditions is provided. An injection molding machine with a molding condition protection function, which is equipped with