JPH07241896A - Molding abnormal display method of injection molding machine - Google Patents

Abstract

(57) [Summary] [Purpose] Proposing a molding abnormality display method for injection molding machines that statistically processes the abnormal history of the molding state and displays it on the monitor screen so that the preventive maintenance priority area related to the abnormal item can be grasped at a glance. To do. [Structure] The abnormal items that occurred during molding are stored in the control device in advance, and the abnormal items are sorted and edited according to the application such as production conditions, and are arranged in order from the one with the highest occurrence frequency to generate alarm items. The number and other alarm information are displayed on the monitor screen.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molding abnormality display method for displaying an abnormal history of a molding state of an injection molding machine (including a die casting machine), and in particular, classifies and edits the abnormal history and adds statistical processing. The present invention relates to a method for displaying a molding abnormality of an injection molding machine which is displayed on a monitor screen.

[0002]

2. Description of the Related Art The injection part of a screw-in-line type injection molding machine has a structure as shown in FIG. In FIG. 6, reference numeral 1 is a hopper for supplying pellets, which is a resin material, to the cylinder barrel 2, and the cylinder barrel 2 is adapted to knead and plasticize the resin material supplied from the hopper 1 into a molten state. There is. Reference numeral 3 is a screw that pushes out the molten resin stored at the tip of the cylinder barrel 2 from the nozzle 4 at the tip of the cylinder barrel 2 by its forward movement. That is, the screw 3 operated by the pressure oil introduced into the injection cylinder (not shown) is advanced into the cavity 7 formed by the clamped movable mold 5 and the fixed mold 6 to fill the molten resin, Molding process is performed. The speed change and the pressure change of the screw 3 in the injection process including the filling process and the pressure maintaining process of the injection molding machine are displayed on the monitor screen of the display device such as the CRT of the control device 10 of FIG. However, in addition to the shot data (waveform monitor) for each shot, there is a shot data list (list) that summarizes only the main items of molding conditions for multiple shot data.
It was displayed on the screen at any time and used for information retrieval and product quality control. On the other hand, in the case of an abnormal condition that exceeds the control range, a mark such as * is added to the process value to add a note to the effect that it is an abnormal condition, and at the same time as the occurrence of the error, information that clearly indicates the abnormal content as shown in FIG. Abnormal message) was displayed on the CRT screen. Further, in this way, the screen is switched to the abnormal history display screen as shown in FIG. 9 in which only the abnormal states that have occurred in each of the shots that have occurred in the past are listed, and the details of the abnormalities during molding in the past are confirmed. It was

[0003]

As shown in FIG. 8, the conventional history of abnormalities is such that the control device 10 arranges the date, time and the latest 10 times of abnormal items in time series when the abnormal state occurs. It was displayed all at once on the screen of the display device, and was used for preventive maintenance of abnormalities during molding and optimization of production conditions, but since only about 10 times of abnormal history is displayed, There was a problem. (1) When machines and peripherals are viewed as one system, it is difficult to understand the preventive maintenance priority area of the system because it is difficult to understand the items with high frequency of occurrence of abnormal items and their ratio in the entire system. . (2) Since it is difficult to understand the items with high frequency of occurrence of abnormalities for each device or each mechanism, the preventive maintenance priority area for each device or mechanism was unclear. (3) Since it is difficult to understand the abnormal items that frequently occur for each type of molded product, it is difficult to find the part that does not conform to the molding conditions for each type of molded product.

[0004]

In order to solve the above problems, in the present invention, in the first invention, a monitor display method for displaying an abnormal history of a molding state of an injection molding machine equipped with a control device is provided. Therefore, the abnormal items generated during molding are stored in advance in the control device, the abnormal items are classified according to the production conditions, and the alarm items and the number of occurrences are arranged in order from the one with the highest occurrence frequency. It was decided to display the alarm information including it on the monitor screen. According to a second aspect of the present invention, there is provided a monitor display method for displaying an abnormal history of a molding state of an injection molding machine including a control device, wherein an abnormal item generated during molding is stored in the control device in advance, and It was decided to classify and arrange abnormal items by device or mechanism, and to display alarm information including alarm items and the number of occurrences on the monitor screen. Further, according to a third aspect of the present invention, there is provided a monitor display method for displaying an abnormal history of a molding state of an injection molding machine including a control device, wherein an abnormal item generated during molding is stored in the control device in advance, and The abnormal items are classified and arranged according to the type of molded product, and the alarm information including the alarm item and the number of occurrences is displayed on the monitor screen.

[0005]

In the present invention, the abnormal items are classified and organized according to the production conditions, and are arranged in descending order of frequency of occurrence, and the alarm items and the number of occurrences, for example, the ratio of the number of alarm occurrences to the total, the latest. The alarm information such as the alarm occurrence date and time is displayed on the monitor screen of the display device. This screen allows you to see the frequent alarm items, their occurrence frequencies, occurrence ratios, etc. at a glance, and to obtain effective guidelines for subsequent error countermeasures. In the second invention,
The abnormal items are sorted by device or mechanism and displayed on the monitor screen. In this case, the preventive maintenance can be focused on the device or mechanism in which many abnormalities occur. further,
In the third aspect of the invention, since the abnormal items are classified and arranged according to the type of the molded product and displayed on the screen, it is possible to obtain information for changing the shape of the molded product in which the abnormalities occur frequently and reexamining the molding conditions.

[0006]

Embodiments of the present invention will now be described in detail with reference to the drawings. 1 to 5 relate to an embodiment of the present invention,
Fig. 1 is a monitor screen diagram showing the abnormal history by production condition, Fig. 2 is a monitor screen diagram showing the abnormal history by device, Fig. 3 is a monitor screen diagram showing the breakdown of abnormal items by device, and Fig. 4 is a molding product type. FIG. 5 is a monitor screen view displaying a history of abnormalities by type, and FIG. 5 is a monitor screen view displaying a breakdown of abnormal items by type of molded product. In the present invention, the abnormal item that occurred during the molding operation in advance is identified by the data management unit (memory device) in the control device.
The abnormal items are classified and edited to process the information, extracted in various forms according to the application, and reproduced on the monitor screen to serve as a guideline for preventing abnormalities and changing molding conditions. The classification items are, for example, each production condition, each device (or each mechanism), and the type of molded product. Specifically, in the case of the production condition, as shown in FIG. 1, various conditions (temperature, pressure,
When abnormal conditions related to speed, time, raw material supply, product removal, etc. occur, they are classified and organized as abnormal items (alarm items) and statistically processed, and "alarm items" and "number of occurrences ( The number of occurrences ”,“ occurrence ratio ”, and“ latest occurrence date and time ”are arranged and taken out on the monitor screen for reference. In the case of FIG. 1, the "prevention maintenance priority area" of the production conditions is further clearly displayed by sequentially arranging from the one having the largest "number of occurrences (occurrence frequency)". If the classification items are by device (or by mechanism), as shown in Fig. 2, for each device / mechanism such as "injection / measurement related", "mold clamping / extrusion related", or "barrel temperature related". As in the case of FIG. 1, the data is classified and tabulated by listing the “number of occurrences”, the “occurrence ratio”, and the “latest occurrence alarm item”, and this is displayed on the monitor screen. FIG. 3 shows one of the classified items classified by device / mechanism in FIG. 2 and displays the classified items in more detail. For example, the “injection / measurement related” item in FIG. 2 is further classified. It is effective for grasping the priority area of preventive maintenance.

On the other hand, when the classification item is classified by type of molded product, as shown in FIG. 4, classification is performed for each file name representing each molded product type, and "number of occurrences" is calculated for each file name. , "Rate of occurrence" and "Alarm item with most occurrence" are arranged and displayed on the monitor screen. FIG. 5 is a further subdivided display of the “alarm items” when the file name is specified, and like FIG. 3 for FIG. 2, it is convenient for grasping the main abnormal items for each molded product. The present invention can be applied not only to an injection molding machine for molding a resin but also to an injection molding machine such as a die casting machine for molding a molten metal.

As described above, in the molding abnormality display method according to the present invention, as compared with the conventional monitor screen shown in FIG. Alarm information classified by device, device (mechanism), and molded product is instantly displayed on the monitor screen, so it is very easy to understand the preventive maintenance priority area of abnormal items.

[0009]

As described above, according to the present invention, the priority area for preventive maintenance of abnormalities is clarified, and it is possible to easily prevent a decrease in the machine operating rate due to an alarm, and also to prevent the occurrence of an alarm. The condition non-conformity part is clarified, and by correcting it, the machine operation rate is improved and the productivity is improved.

[Brief description of drawings]

FIG. 1 is a monitor screen view for displaying an abnormal history by production condition according to an embodiment of the present invention.

FIG. 2 is a monitor screen view for displaying a history of abnormalities by device according to an embodiment of the present invention.

FIG. 3 is a monitor screen view for displaying a breakdown of abnormal items by device according to the embodiment of the present invention.

FIG. 4 is a monitor screen view that displays a history of abnormalities by type of molded product according to an embodiment of the present invention.

FIG. 5 is a monitor screen view displaying a breakdown of abnormal items for each type of molded product according to the embodiment of the present invention.

FIG. 6 is a schematic side sectional view showing a configuration of a conventional injection molding machine.

FIG. 7 is a control system diagram of a conventional injection molding machine.

FIG. 8 is a monitor screen view displaying a conventional abnormality message.

FIG. 9 is a monitor screen diagram for displaying a conventional abnormal history.

[Explanation of symbols]

 1 Hopper 2 Cylinder Barrel 3 Screw 4 Nozzle 5 Movable Mold 6 Fixed Mold 7 Cavity 10 Control Device 20 Injection Molding Machine Main Body and Peripheral Equipment

Continuation of front page (51) Int.Cl. ⁶ Identification number Office reference number FI Technical display location G06F 19/00

Claims (3)

[Claims] 1. A monitor display method for displaying an abnormal history of a molding state of an injection molding machine having a control device, wherein an abnormal item generated during molding is stored in the control device in advance, and the abnormal item is displayed. A molding abnormality display method for an injection molding machine that sorts by production condition and arranges the alarms in order from the one with the highest occurrence frequency to display alarm information including alarm items and the number of occurrences on the monitor screen. 2. A monitor display method for displaying an abnormal history of a molding state of an injection molding machine having a control device, wherein an abnormal item generated during molding is stored in advance in the control device, and the abnormal item is displayed. Arrange by device or mechanism,
In addition, a method for displaying molding abnormalities of injection molding machines that displays alarm information including alarm items and the number of occurrences on the monitor screen. 3. A monitor display method for displaying an abnormal history of a molding state of an injection molding machine having a control device, wherein an abnormal item generated during molding is stored in the control device in advance, and the abnormal item is displayed. A molding abnormality display method for injection molding machines that sorts and sorts by type of molded product and displays alarm information including alarm items and the number of occurrences on the monitor screen.