JPH03295623A - Control device of molding machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a control device for a molding machine such as an injection molding machine or an extrusion molding machine.

[Prior Art] In a conventional molding machine equipped with an expert system, a machine control unit attached to the molding machine body and connected to a plurality of sensors and an expert system are provided independently from each other. , the factual information detected by each sensor is obtained via the machine control section. For this reason, the expert system that uses factual information from each sensor and the machine control section that uses the inference results of the expert system are configured to send necessary information to each other by serial transmission.

This information is transmitted in the following steps.

First, in order to obtain factual information from the sensor, the expert system creates an identification code for the necessary factual information and transmits it as a command to the control unit. The controller identifies the command and sends the necessary factual information to the expert system. If the required factual information is not available, run a program that collects factual information from that point on, and then sends it to the expert system. The expert system stores the received factual information in a pre-specified area. Next, the expert system infers the forming conditions based on the knowledge base and factual information and provides an inference result.

When executing the inference results, the expert system converts the results related to control into a form that can be transmitted, and transmits them to the control unit. In addition, if necessary, the message is displayed as a message on a CR7 display device or the like using an expert system. Then, the control unit identifies the operation command from the received information and executes control of the molding machine if necessary.

[Problems to be Solved by the Invention] In the above-mentioned conventional technology, information is transmitted between the control unit and the expert system by serial transmission, so it takes time to transmit the information, and it is difficult to use control using the inference of the expert system. There was a problem in that it was difficult to perform controlled control at high speed.

The present invention has been made in view of the above-mentioned problems of the conventional technology, and provides a molding machine that integrates a control unit and an expert system and can perform control at high speed using the inference of the expert system. The purpose is to provide a control device for.

[Means for Solving the Problems] In order to achieve the above object, a control device for a molding machine of the present invention includes a machine control section, an expert system consisting of an inference section and a knowledge base, A common data area is provided in a shared memory that is accessible from both of the inference units, and the inference unit makes inferences based on the data of the knowledge base while referring to control information stored in the common data area. The inference result is stored in the common data area, and the machine control unit stores the control information collected from the molding machine in the common data area, and also stores the inference result in the common data area. It is characterized by controlling a molding machine.

The machine control section and the inference section may be configured as one central processing unit, and may be divided by distributed processing of the operating system.

The machine control section and the inference section may each include a central processing unit.

[Operation] Each factual information detected from a plurality of sensors or a molding machine is stored in a common data area of the control device via the machine control section. The expert system makes inferences while constantly referring to the factual information in this common data area. Inference results by the expert system are stored in the common data area,
On the other hand, the machine control section uses this inference result as needed to control the molding machine.

That is, information between the machine control unit and the expert is transmitted via the common data area, eliminating the need for serial transmission that takes time. Therefore, the time for transmitting the information is shortened compared to that using conventional serial transmission.

[Example] Embodiments of the present invention will be described based on the drawings.

FIG. 1 schematically shows the software configuration of an embodiment of the present invention, in which a control device 1 has each task of a machine control section 3, an inference section 5, and a human interface section 9, and an operating system (not shown in the figure). (Denoted as “O5”)
It uses a multi-task software configuration method divided by 8 distributed processing. The shared memory 2 is a data area that can be accessed from each task (multitask).
A common data area 7 is provided which is defined for common purposes and can be referenced at any time (arbitrarily).

The expert system 4 is composed of the inference section 5 and a knowledge base 6 in which knowledge base information, which is data created in advance based on the knowledge of experts and skilled workers involved in molding, is stored. There is. The inference section 5 is
Based on the knowledge base information 11 stored in the knowledge base 6, inference is made while referring to fact information stored in the common data area 7, which will be described later, and the inference result is stored in the common data area 7. , and output to the outside via a human interface 7, which will be described later. The machine control unit 3 receives control information 10 (information necessary for control, such as resin temperature, mold temperature, screw position, etc.) from a plurality of sensors (not shown) attached to the molding machine 12 in accordance with a predetermined timing. input) and stores the collected results in the common data area 7 as factual information. In addition, the machine control unit 3 performs calculations for control based on the inference results stored in the common data area 7 by the inference unit 5 and instructions indicated by command/display information 13, which will be described later. Control information i.

(output) and controls the molding machine 12.

The human interface section 9 outputs the inference result of the inference section 5 as command/display information 13 (output), displays it to the operator on a display 25 (see FIG. 2), which will be described later, and also displays the operator's commands, which will be described later. keyboard 2
6 (see Figure 2) command/display information 13 (input)
Enter as .

FIG. 2 shows an example of a control device to which the embodiment shown in FIG. 1 can be applied. In the control device 1 shown in FIG. A human power 23, a position input 24, etc. are provided, and control information 10 (see FIG. 1) can be input and output via these plurality of interfaces. The central processing unit 27 (referred to as rcpu in FIG. 2) can be constituted by a known Neumann type microcomputer.

The read-only memory 28 (indicated as 'ROM' in FIG. 2) stores software programs for the operating system 8, machine control section 3, inference section 5, and human interface section 9 shown in FIG. 1, respectively. ing. The random access memory 29 (indicated as rRAM in FIG. 2) is the shared memory 2 shown in FIG.
used as. The display 25 and the keyboard 26 can be used for displaying the instruction/display information 13 shown in FIG. 1 and for inputting commands, respectively.

In the above embodiment, a multitasking configuration was shown in which one central processing unit was divided by distributed processing using an operating system. A multiprocessing method using a central processing unit may also be used.

[Effects of the Invention] Since the present invention is configured as described above, it produces the following effects.

Since information is shared between the machine control unit and the expert system, the information transmission time is shortened, and control using the expert system's reasoning can be performed at high speed. As a result, the objects of control can be expanded and more appropriate molding conditions can be set, so the quality of the molded product can be improved.

[Brief explanation of the drawing]

FIG. 1 is a block diagram schematically showing the software configuration of an embodiment of the present invention, and FIG. 2 is a block diagram showing an example of a control device to which the embodiment shown in FIG. 1 can be applied. 1-・Control unit jilij 2-・・Shared memory 3・・Machine control unit 4・・Expert system 5・・Inference unit 6・・・Knowledge base 7・・
・Common data area 8...Operating system 9...Human interface section 1 0...Control information 2...Molding machine

Claims (1)

[Scope of Claims] 1) An expert system (4) comprising a machine control section (3), an inference section (5) and a knowledge base (6), wherein the machine control section (3) and the inference section ( A common data area (7) is provided in the shared memory (2) that is accessible from both of the above-mentioned knowledge base (6), and the inference section (5) extracts the common data based on the data (11) of the knowledge base (6). The machine control unit (3) makes an inference while referring to the control information (10) stored in the area (7) and stores the inference result in the common data area (7). The control information (10) collected from (12) is stored in the common data area (7), and the molding machine (12) is controlled based on the inference result of the common data area (7). A control device for a molding machine. 2) The molding machine according to claim 1, wherein the machine control section (3) and the reasoning section (5) are composed of one central processing unit (27) and are divided by distributed processing of an operating system. control device. 3) The control device for a molding machine according to claim 1, wherein the machine control section (3) and the reasoning section (5) are each equipped with a central processing unit.