JPS63193816A - Group management of extrusion molding device - Google Patents

Abstract

PURPOSE:To enable the title system to perform sufficient production schedule, by a method wherein each controller for monitoring operational circumstances of each process, processing into predetermined control data and instructing production schedule data by linking them with higher rank of three controllers controlling each of processes such as raw material supply, extrusion molding and conveyance is provided. CONSTITUTION:When production schedule data are sent to a controller 23 through a controller 24, the controller 23 sends manufacturing data to a controller 21 for controlling a corresponding extrusion molding machine. The controller 21 begins molding according to the instructed manufacturing data, a controller 22 actuates an automatic conveying device based on a command through the controller 23, and a molded product is put into a warehouse. Then the molding is repeated until amount equivalent to a production schedule is warehoused. Thus data showing the consumption volume of raw materials and the production output are sent to the controller 23 from the controllers 20, 21, processed into control data together with stock data and sent to a controller 24. Therefore, those control data can be monitored at real time by the controller 24.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a group management system for extrusion molding equipment.

(Prior Art) Conventionally, a control system for a group of devices constituting an extrusion molding facility has not been fully automated, and some systems have been operated manually. For example, equipment in the raw material supply process is automatically controlled by a microcomputer or sequencer, and all extrusion machines are collectively controlled according to instructions.
The completed molded product is placed on a moving cart and moved to the next process such as an inspection process. Furthermore, the management of operational information such as production results and various efficiencies of each extrusion molding machine is also performed artificially.

(Problems to be solved by the invention) As described above, since the conventional control system uses a moving cart for transportation, operator intervention is essential, and furthermore, operational information is managed manually. It cannot be grasped in real time. For this reason, sufficient production planning could not be carried out until several days after the actual start date.

(Means for Solving the Problems) The extrusion molding equipment group management system of the present invention is a system in which a group of devices constituting a raw material supply process, an extrusion molding process, and a conveyance process are automatically operated. A first controller that controls a group of devices for the extrusion molding process and sequentially outputs data indicating at least the amount of raw material used; a second controller that controls a group of devices for the extrusion molding process and sequentially outputs data indicating at least the production yield; a third controller that controls a group of devices in the conveyance process that conveys the finished molded product; a fourth controller that receives the two types of data and processes it into predetermined management information;
The fifth controller is linked to the upper level of the controller, and instructs the fourth controller to provide production planning information, and also receives the management information from the fourth controller.

The management information includes information indicating production progress, information used for cost management, information used for quality control, and the like.

The production plan information is information about how many products of which type to produce by when and with which extrusion molding machine.

(Operation) When the production plan information is sent from the fifth controller to the fourth controller, the fourth controller sends the manufacturing information to the second controller that controls the corresponding extrusion molding machine. The second controller starts molding according to the instructed manufacturing information. At the same time, the third controller operates the automatic transport device based on the command from the fourth controller to store the molded product into a warehouse (for example, an intermediate warehouse where the molded product is temporarily stored). The molding process is then repeated until the planned number of pieces are delivered to the warehouse. By the way, from the start to the stop of molding, data indicating the amount of raw materials used and data indicating the manufacturing yield are sent from the first controller and the second controller to the fourth controller, and the fourth controller manages the data by itself. This information is processed into management information together with inventory information, etc., and sent to the fifth controller. The fifth controller can appropriately monitor this management information in real time.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a plan view and a diagram showing a control system of an extrusion molding factory in which a group of devices constituting extrusion molding equipment according to the present invention are arranged.

In this extrusion molding factory, ° is a raw material supply process 1 that supplies raw materials, an extrusion molding process 2, and an intermediate warehouse 3 that temporarily stores molded products.
Group management control is performed for a group of devices constituting each of the transport processes 4 to be transported to.

The raw material supply process 1 is composed of a raw material supply device 5 and the like, and is installed on one side 7 of the factory site 6.

This raw material supply device 5 supplies a plurality of types of molding resin raw materials (PVC
etc.), and this molding resin raw material is supplied via a raw material supply pipe 8 to a raw material hopper 10 of an extrusion molding machine 9 constituting the extrusion molding process 2.

The extrusion molding process 2 includes an extrusion molding machine 9, a mold 11 connected to the extrusion direction of the extrusion molding machine 9, a molded product take-off device 12,
It consists of an extrusion molding line 14 composed of a cooling device 13 that cools the molded product after taking it, and a product processing device (not shown) that cuts the molded product into regular dimensions. A plurality of devices are provided at intervals along the longitudinal direction of the factory site 6, with one side 7 where the device group is arranged as a base point. Each extrusion line 1
Each of the four extrusion molding machines 9 mainly molds pipe materials of different diameters. Molded products are produced on each extrusion line 14.
The full pallet is automatically dropped into a pallet 15 placed at the end of the pallet, and the full pallet is automatically replaced with a new empty pallet.

The conveyance process 4 includes, in addition to the intermediate warehouse 3, an automatic conveyance device 16 that conveys the full pallet 15. This automatic conveyance device 16 is an extrusion molding line 1
4. The pallet 15 full of products moves along guide rails 17 provided along all ends of the pallet 15.
is placed on a vertically movable pallet mounting table 18 and automatically transported to an empty shelf in the intermediate warehouse 3. Note that a room 29 partitioned within the factory premises 6 is a monitor room that monitors the operating status of each piece of equipment.

FIG. 2 is a block diagram showing an example of the system configuration of a group management system for extrusion molding equipment according to the present invention.

In FIG. 2, an extrusion process control controller 21 (referred to as a local computer) is provided for each extrusion line 14 to control operations such as automatic start/stop operation and steady operation of the extrusion line 14. .

This extrusion process control controller 21 detects operational abnormalities (alarms) of each device constituting the extrusion line 14, and outputs quantity control data such as manufacturing output and number of defective products to a host computer 23, which will be described later.

Further, the raw material supply device 5 is automatically operated and controlled by a controller 20 for controlling the raw material supply process (referred to as a local computer), and the intermediate warehouse 3 and the automatic transport device 16 are automatically controlled by a controller 22 for controlling the transport process (referred to as a local computer). Operation is controlled. The raw material supply process control controller 20 outputs the raw material usage amount and alarms for each device to the host computer 23, and the transport process control controller 22 outputs alarms to the host computer 23 as well.

An overall control/management controller 23 (referred to as a host computer) is installed above these local computers 20 to 22 to supervise and manage all processes, and further above this host computer 23 is installed production planning information ( A factory management/office computer 24 is installed for instructing information on how many products of which type to manufacture, by when, under what manufacturing conditions, and with which extrusion molding machine. The factory management/office computer 24 and the host computer 23 are connected through a communication line 32a, and the host computer 23 and the above-mentioned local computers 20 to 22 are connected through a communication line 32b.

The host computer 23 has input/output devices in addition to a main control device and a storage device that control equipment for the entire factory.
A display device (CRT) and a recording device (printer) are provided to check the operating status, quantity control data, inventory data of the intermediate warehouse 3, progress data against the production plan, etc. A shipping information display device 27 for instructing workers is located at the shipping exit 3a of the intermediate warehouse 3.
(See FIG. 1), and an external alarm display device 28 is provided in the monitor room 29 to notify the operator of abnormalities such as alarms.

In particular, a fixed disk (not shown), which is one of the storage devices of the host computer 23, stores control programs executed by the host computer 23 and various data such as manufacturing conditions for each molded product.

Next, the operation from the start to the stop of molding in the above-mentioned group management system will be explained.

First, production plan information is transmitted from the factory management/office computer 24 to the host computer 23 via the communication line 32a.
sent to. The host computer 23 selects the extrusion line 14 to be operated based on the production plan information, and sends the local computers 20 to 22 controlling the corresponding extrusion line 14 necessary for molding the product to be molded. Manufacturing conditions (e.g. feeder motor,
Target values for controlled objects such as heaters) are also communicated
Send via A32b. Local computer 20-2
Step 2 automatically starts the extrusion molding machine 9 according to the instructed manufacturing conditions. That is, the barrel of the injection molding machine 9, the mold 11
After being preheated by the heater, the feeder and screw are automatically started, and the conditions such as the surface temperature of the barrel and mold are changed to the steady production conditions necessary for continuous production, and molding is started. The molded product is cut into a fixed size with a cutter in the product processing device, and then placed on a pallet 15.
are sequentially free-falled and stored. When the pallet 5 becomes full, the local computers 20 to 22 output a signal to the host computer 23 indicating a request for storage into the intermediate warehouse 3. After receiving this signal, the host computer 23 issues a command to the intermediate warehouse 3 and a pallet exchange command to the local computer 22 that controls the automatic transport device 16. After exchanging the empty pallet with the empty pallet (15), move this pallet 15 to the intermediate warehouse 3.
Transport to. Then, the process is repeated until the number of products received in the intermediate warehouse 3 reaches the production planned number. When the production planned number is reached, the local computer 22 automatically lowers the temperature of the barrel and mold 11, stops the feeder and screw, and restarts the corresponding extrusion line according to the automatic stop condition, which is one of the pre-specified manufacturing conditions. 14, the operation of the extrusion molding machine 9 is automatically stopped.

On the other hand, the molded products stored in the intermediate warehouse 3 are shipped by workers based on the shipping information instructed by the factory management/office computer 24 and displayed on the screen on the shipping information display device 27. After taking out the specified quantity of molded products on this screen, the operator presses the delivery completion key (
(not shown) to send information indicating completion of shipping to the upper computer 23 via the transport process control controller 22.
Return to ゜24.

By the way, from the start to the stop of molding as described above, the host computer 23 is connected to the local computer 21.
Since the host computer 23 receives data indicating the raw material usage amount from the local computer 20 and data indicating the actual measured temperature of the barrel, mold 11, etc., operating status such as heater current, and manufacturing output from the local computer 20, the host computer 23 manages the data by itself. The host computer 23 and the factory management/office computer 24 keep track of the inventory amount, work-in-process amount, and shipment amount for the entire factory together with the inventory information of the intermediate warehouse 3. For this reason, it is possible to grasp the difference between production plans and actual manufacturing results, control costs such as weight efficiency (ratio of feed material weight to molded product weight), and manage quality such as extrusion molding machine 9 screw rotation speed and resin temperature in real time. Furthermore, this is carried out with high precision for each extrusion molding line 14. Furthermore, since the host computer 23 monitors the alarms sent from each of the local computers 20 to 22, the external alarm display device 28 displays an alarm corresponding to the equipment in which the alarm occurred, so that troubleshooting can be quickly taken. Can be done.

The system in this example shows a three-layer hierarchy system with the factory management/office computer 24 at the top; however, above the factory management/office computer 24 there are not only manufacturing departments but also sales and accounting departments. It is also possible to construct a system equipped with a computer that also manages the information.

(Effects of the Invention) As described above, according to the present invention, the manufacturing performance and inventory amount at an extrusion molding factory can be grasped in real time. Therefore, an appropriate production plan can be created immediately.

[Brief explanation of the drawing]

FIG. 1 is a plan view and a control system of an extrusion factory in which a group of devices constituting an extrusion facility according to the present invention are arranged, and FIG. 2 is a block diagram showing the system configuration of a group management system. l...Raw material supply process 2...Extrusion molding process 3...
- Intermediate warehouse 4...Transportation process 20...Controller for controlling the raw material supply process (first controller) 21...Controller for controlling the extrusion molding process (second controller) 22...Controller for controlling the transfer process (Third controller) 23...Controller for general and management control (Fourth controller) Patent applicant Representative of Sekisui Chemical Co., Ltd. Hiro 1) Kaoru Pr 7! ,'

Claims (1)

[Claims] 1) A system in which a group of devices constituting a raw material supply process, an extrusion molding process, and a conveyance process are automatically operated, which controls the group of devices in the raw material supply process and includes data indicating at least the amount of raw material used. a first controller that sequentially outputs data; a second controller that controls a group of devices in the extrusion molding process and sequentially outputs data indicating at least manufacturing output; and a group of devices in a conveyance process that transports the finished molded product. a third controller that is linked above these three controllers, monitors the operating status of the equipment group in each process via these controllers, receives at least the above two types of data, and inputs it to predetermined management information. a fourth controller for processing, and a fifth controller linked above the fourth controller to instruct production planning information to the fourth controller and receive the management information from the fourth controller. A group management system for extrusion molding equipment. 2) A group management system for extrusion molding equipment according to claim 1, wherein the contents of the management information are displayed on the screen as appropriate. 3) The group management system for extrusion molding equipment according to claim 1, wherein the first to third controllers output an alarm indicating an abnormal state of a group of devices in each process to a fourth controller. .