JPH05345343A - Management system for injection molding apparatus - Google Patents

Abstract

PURPOSE:To improve the productivity and efficiency of mold maintenance by indicating the transfer of a mold on the basis of a production schedule in each case that a lapse of time from the last maintenance reaches a maintenance cycle or the experience of molding shot number reaches a maintenance shot cycle. CONSTITUTION:The central control unit 10 acts to compare the maintenance time cycle of each mold with a lapse of time after the last maintenance, or compare the maintenance shot cycle of each mold with the experience of molding shot number. When a lapes of time reaches the maintenance shot cycle or the experience of molding shot number reaches the maintenance shot cycle, based upon the input information from production schedule inputting means 11, a transfer controller 60 is indicated to transfer the mold to maintenance means 40. Herein, the time cycle and shot cycle are subdivided in a manner corresponding to a plurality of items of each mold and then compared to each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a management system for an injection molding machine, and more particularly, to a management system for an injection molding machine which optimizes the timing of mold maintenance to improve reliability.

[0002]

2. Description of the Related Art Conventionally, in injection molding, a molten resin is filled in a mold at a high pressure, and the resin is hardened by slowly cooling the mold with the mold closed. There is a problem that the molded product becomes a defective product due to deformation and wear due to the use of the resin and the filling of high temperature and high pressure resin. Therefore, the mold used for injection molding needs to be maintained with a predetermined number of molding shots in order to stabilize the quality of the molded product.

Therefore, recently, for example, Japanese Unexamined Patent Publication No. 3-1244
As described in Japanese Patent No. 17, there is proposed a management system that manages the number of molding shots and displays the mold maintenance time. When the number of molding shots counted by the controller reaches a predetermined number of molding shots required to maintain the mold, this management system of the injection molding device displays the information and notifies the operator of the mold, It is supposed to instruct maintenance of.

Further, Japanese Patent Laid-Open No. 63-233813 describes a management system for automatically changing dies according to a production schedule and its progress.

[0005]

However, in the above-mentioned management system, the cycle in which the mold maintenance is required is controlled by the number of molding shots. That is, since the cycle requiring maintenance depends only on the number of molding shots, it is possible to manage a mold whose quality has deteriorated due to the elapsed time since the last maintenance as a mold requiring maintenance. There wasn't. For this reason, even if the mold or the like stored in the storage for a long period of time requires maintenance, the mold continues to be used, and a good product cannot be stably produced.

[0006] Further, there are a plurality of maintenance items in the maintenance work of the mold, and the period in which maintenance is required differs for each item, but since maintenance is not performed due to the difference in the period, proper maintenance is required. I couldn't do it at a certain time. Also, as the use of the mold progresses, the cycle that requires maintenance of the mold changes, but despite the need for maintenance, continue using the mold without changing the cycle. It was not possible to produce a good product in a stable manner.

Further, even when the number of defective moldings in a specific mold increases due to deterioration of the quality of the mold, if the mold has not reached the maintenance time, the mold is still used. As a result, it was not possible to consistently produce good products. On the other hand, in the management system that automatically changes the mold according to the production schedule of the injection molding device and the progress thereof, which will be described later, the mold requires maintenance of the mold and the mold has deteriorated due to deterioration of the mold. Since it was not replaced, it was not possible to stably produce good products.

Further, since the cycle of the mold maintenance is not reflected in the schedule of the injection molding apparatus, the mold maintenance cannot be performed efficiently and the productivity of the injection molding apparatus is lowered. It was Further, when the molds are replaced, the molds to be put in are not selected based on the actual results of the quality of the molded products by the molds, so that the productivity is lowered.

Therefore, according to the present invention, in addition to the cycle requiring the maintenance of the mold, which is only the number of molding shots, the cycle requiring the maintenance with respect to the elapsed time from the previous maintenance is added, and the maintenance is performed. Provided is a management system for an injection molding apparatus, which can improve the productivity of the injection molding apparatus by managing each item and can improve the efficiency of mold maintenance by adding management items. The purpose is to

[0010]

In order to achieve the above object, the invention according to claim 1 includes an injection molding apparatus having an injection molding machine for performing an injection molding operation on a mold, and maintenance means for maintaining the mold. A mold storage means for storing a plurality of molds before or after injection molding, a mold transfer means for transferring the mold between the injection molding device, the maintenance means, and the mold storage means, A production schedule input means for inputting a production schedule of a molded product, and a shot cycle input means for inputting a maintenance shot cycle which is set according to each mold and is a cycle depending on the number of molding shots requiring maintenance. When,
The time cycle input means that is set for each mold and the maintenance time cycle that requires maintenance depending on the elapsed time from the last maintenance is input, and the maintenance result for each mold sent from the maintenance means In addition to history data input means input as maintenance history data and the production schedule, maintenance shot cycle, maintenance time cycle, maintenance history data input to each of the input means, each die input from the injection molding device And an information storage unit for storing the number of molding shots, and a control unit for inputting information from each of the input units and operating the transfer unit according to the input information to control the transfer of the mold. The control means sets the maintenance time for each mold at a fixed cycle or a predetermined cycle. The elapsed time since the maintenance was performed last time with the wheel, when the elapsed time has reached the maintenance cycle, or the maintenance shot cycle for each mold and the actual number of molding shots are compared, When the actual number of shots reaches the maintenance shot cycle, the transfer means is instructed to transfer the mold based on the input information from the production schedule input means.

According to a second aspect of the present invention, there is provided inspection means for inspecting a molded product molded by the injection molding device,
The control means instructs the transfer means to transfer the mold based on the output information from the inspection means when the quality of the molded product has a tendency to deteriorate, thereby exchanging the mold. According to the invention of claim 3, the inspection information of the inspection means is stored in the information storage means as inspection history data, and based on the statistics of the inspection history data stored in the information storage means, It is characterized in that the maintenance shot cycle or the maintenance time cycle is changed for each mold.

Further, in the invention according to claim 4, the maintenance of the mold is subdivided into a plurality of maintenance items, and the maintenance shot cycle and the maintenance time cycle are subdivided so as to correspond to the maintenance items. In addition to the information storage means, the control means performs a comparison between a maintenance shot cycle corresponding to a plurality of maintenance items for each mold and a record of the number of molding shots at a fixed cycle or a predetermined cycle, and the molding shots. If the number of records has reached the maintenance shot cycle, or if the maintenance time cycle corresponding to multiple maintenance items for each mold is compared with the elapsed time from the previous maintenance, the elapsed time is compared to the maintenance cycle. , If the production has reached Le It is characterized in that to indicate the transfer of the mold to the transport means based on input information from Lumpur input means.

Further, the invention according to claim 5 is item data input means for inputting output information of the inspection means and maintenance-related item data corresponding to maintenance items, and item data for storing the data input to the input means. Storage means is provided, the control means adds the output information of the inspection means to the information of the information storage means as inspection result history data, and based on the statistics of the inspection result history data stored in the information storage means, It is characterized in that the maintenance shot cycle or the maintenance time cycle is changed for each mold for each of a plurality of maintenance items.

Further, the invention according to claim 6 is characterized by comprising a production schedule creating means for creating a production schedule based on the maintenance shot cycle and the maintenance time cycle for each mold. According to a seventh aspect of the present invention, the control means, based on the inspection information stored in the information storage means, selects a molded product excellent in quality from the molds stored in the mold storage means. A mold to be molded is selected, and the mold is put into an injection molding device. The invention according to claim 8 is characterized in that the control means subdivides the maintenance item into molds. For each time, referring to the corresponding maintenance shot cycle or the maintenance time cycle, maintenance is performed at a preset number of molding shots or at a preset time. Nsu select the item that is required, it is characterized in that instructs the maintenance unit maintenance items that apply.

[0015]

According to the present invention, the control means compares the maintenance time cycle for each mold with the elapsed time since the previous maintenance is performed in a constant cycle or a predetermined cycle, and the elapsed time is compared. When the maintenance cycle is reached, or when the maintenance shot cycle for each mold is compared with the actual number of molding shots and the actual number of molding shots reaches the maintenance shot cycle, the production schedule input The transfer means is instructed to transfer the mold based on the input information from the means. Therefore, the number of molding shots for each mold and the period required for maintenance depending on the elapsed time from the last maintenance are managed, the maintenance is performed reliably without hindering the production schedule, and the yield rate of molded products is improved. improves.

According to the second aspect of the present invention, the control means instructs the transfer means to transfer the mold when the quality of the molded product tends to deteriorate based on the output information from the inspection means. The mold is replaced. Therefore, the deterioration of the quality of the mold is grasped, and the mold is replaced before the number of defective products is increased, and the non-defective rate of the molded product is improved. According to the third aspect of the invention, the maintenance shot cycle or the maintenance time cycle for each mold is changed based on the statistics of the inspection history data stored in the information storage means. Therefore, the cycle in which maintenance is required for each mold has an appropriate value, and the mold is maintained at a suitable timing.

In a fourth aspect of the present invention, the control means compares a maintenance shot cycle corresponding to a plurality of maintenance items for each mold with a predetermined number of molding shots at a constant cycle or a predetermined cycle. If the actual number of molding shots has reached the maintenance shot cycle, or if the maintenance time cycle corresponding to a plurality of maintenance items is compared with the elapsed time from the previous maintenance, the elapsed time is the maintenance cycle. In case of reaching, the transfer means is instructed to transfer the mold based on the input information from the production schedule input means. Therefore, the cycle in which maintenance is required for each maintenance item depending on the number of molding shots and the elapsed time since the last maintenance is performed for each mold is managed, and the maintenance is reliably performed without disturbing the production schedule. Improves the yield rate of molded products.

According to a fifth aspect of the invention, the maintenance shot cycle or maintenance time cycle for each mold is changed for each of a plurality of maintenance items based on the statistics of the inspection result history data stored in the information storage means. It Therefore, the cycle in which maintenance is required for each maintenance item for each mold has an appropriate value, and the maintenance of the mold is performed at a suitable timing.

According to the sixth aspect of the invention, a production schedule is created based on the maintenance shot cycle and the maintenance time cycle for each mold. Therefore, it is possible to prevent the productivity from being lowered due to the maintenance of the mold. In the invention according to claim 7, the control means molds a molded product of excellent quality from the molds stored in the mold storage means based on the inspection information stored in the information storage means. Select the mold,
The mold is put into an injection molding device. Therefore, a high-quality mold is always put in, and the quality of the molded product is improved.

In the invention according to claim 8, the control means refers to the corresponding maintenance shot cycle or the maintenance time cycle for each maintenance item subdivided for each mold, and preset predetermined molding shots. The number of items or items requiring maintenance within a predetermined time is selected, and the corresponding maintenance items are instructed to the maintenance means. Therefore, the efficiency of the maintenance means is improved.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. 1 to 3 are views showing an embodiment of a management system for an injection molding apparatus according to the present invention, and FIG. 1 shows an overall configuration of the management system according to the present invention. This management system is used in injection molding equipment that uses multiple molds, fills the molds with molten resin at high pressure, and slowly cools them while the molds are closed to cure the resin. It is related to the management of that mold.

As shown in FIG. 1, reference numeral 10 denotes a central control panel, and the central control panel 10 uses various input information input by the input device 11 and various information for each mold stored in the information storage device 12. It is a control unit that controls each mold. The input device 11 is a production schedule input means for inputting a production schedule of molded products, and a maintenance shot cycle which is set according to each mold and which is a cycle depending on the number of molding shots requiring maintenance. Shot cycle input means, a time cycle input means that is set for each mold, and a maintenance time cycle that requires maintenance depending on the elapsed time from the previous maintenance, and output information of the inspection means described later. And item data input means for inputting maintenance-related item data corresponding to the maintenance item. The information storage means 12 has history data input means for inputting the maintenance results for each mold sent from the maintenance means as maintenance history data, and the production schedule, maintenance shot cycle, and maintenance input to the input means. In addition to the time cycle and maintenance history data, the number of molding shots for each mold input from the injection molding device is stored. 20
Is an injection molding apparatus, and the injection molding apparatus 20 has an injection molding machine and molds a molded product using a plurality of molds. Reference numeral 30 is an inspection means, and the inspection means 30 inspects the molded product. 40 is a maintenance means, and maintenance means
40 performs mold maintenance. 50 is a mold storage means, and the mold storage means 50 is a mold storage for storing the molds. These means 11, 12, 30, 40, and 50 and the injection molding apparatus 20 are connected to the central control panel 10 so that the input information and the output information can be transmitted and received. Further, the injection molding device 20 and the means 40, 50 are connected by a mold transfer device 70 for transferring a mold, which is composed of mold transfer paths 71 to 73, and the mold transfer device 70 is connected to the central control panel 10. It is controlled by a mold transfer controller 60 which is connected and receives an instruction from the central control panel 10 to form a mold transfer means.

When the injection molding apparatus 20 finishes the molding, it takes out the molded product from the mold and transfers the molded product to the inspection means 30, and at the same time, the identification data such as the type and number of the mold used, for example, the mold ID. Send to central controller 10. When the central controller 10 receives the mold ID, the information storage means 12
It is necessary to count up the number of molding shots in the molding result data corresponding to each item of the corresponding mold maintenance items stored in, and to maintain the mold entered by the shot cycle input means. A maintenance shot cycle (hereinafter simply referred to as a shot cycle), which is the number of molding shots in a cycle, is compared with the counted number of molding shots. If the number of molding shots does not reach the shot cycle as a result of the comparison, molding of the molded product is continued by the injection molding device 20 as it is, but if the number of molding shots reaches the shot cycle, the central control unit 10 sets the mold. Start exchange control,
The central controller 10 instructs the mold transfer controller 60 to transfer the corresponding mold to the maintenance means 40. In addition, even in the maintenance time cycle (hereinafter, simply referred to as a time cycle), which is the time elapsed since the previous maintenance of the cycle in which the maintenance of the mold input by the time cycle input means is required, is performed depending on the number of molding shots. The same processing as the shot cycle that manages the maintenance of is performed. The central controller 10 controls the information storage means 12 at a preset fixed cycle.
Refer to the maintenance history data of each mold stored in, compare the elapsed time and time cycle from the last maintenance for each maintenance item to the present, and compare the current time since the last maintenance. When the time has reached the time cycle, the mold replacement control is started and the mold transfer controller 60 is instructed to transfer to the maintenance means 40.

Next, the central controller 10 subtracts the number of molding shots from the shot cycle of the corresponding mold for each maintenance item to calculate the allowable number of molding shots for that mold for each maintenance item. Here, the central controller 10 compares the minimum shot cycle of each maintenance item with the allowable number of molding shots of each maintenance item, and the maintenance is required for the maintenance item whose allowable number of molding shots is equal to or less than this minimum shot cycle. Create a maintenance list as an item. The maintenance list is transmitted to the maintenance means 40, and the necessary maintenance items are instructed. Similarly for the time cycle, the central controller 10
Calculates the permissible molding time of each mold for each maintenance item by subtracting the elapsed time since the last maintenance was performed from the time cycle of the mold corresponding to each maintenance item. Here, the central controller 10 compares the shortest time cycle of each maintenance item with the allowable molding time of each maintenance item, and determines the maintenance items with the minimum allowable molding time of the time cycle or less as items requiring maintenance. Create as a maintenance list.
The maintenance list is transmitted to the maintenance means 40, and the necessary maintenance items are instructed.

Then, when the maintenance of the mold is completed, the maintenance means 40 sends to the central controller 10 a list of maintenance items that have been maintained together with the corresponding mold ID as maintenance result data. Upon receiving the maintenance result data, the central control device 10 updates the maintenance history data stored in the information storage means 12, and at the same time, the number of molding shots of the maintenance item of the corresponding die and the elapsed time since the last maintenance. Is reset, and the mold transfer controller 60 is instructed to transfer the mold to the mold storing means 50 for storing the mold.

The inspection means 30 transmits the inspection result of the molded product molded by the injection molding device 20 to the central control device 10 as the output information of the inspection result data together with the mold ID including the defect content and the physical property value. The input device 11 is provided with item data input means for inputting inspection result data and maintenance-related item data corresponding to maintenance items, and central control for receiving inspection result data corresponding to the maintenance items input by this input means. The device 10 is an information storage means 12
The inspection result history data stored in is updated. The central controller 10 refers to the inspection result history data every predetermined period, for example, every 3 hours, and a deterioration tendency is recognized in the quality of the molded product and the cause is a mold,
Defect rate for the mold that has been injected into the injection molding device 20,
When the occurrence rate or physical property value for each defective item is out of the preset range and when is confirmed, the mold replacement control is started. Then, the central control panel 10 performs statistical processing by correlating the output information of the inspection means 30 and the inspection result history data for each maintenance item, and makes a change when it is necessary to change the maintenance period for each maintenance item. The shot cycle and time cycle stored in the information storage means 12 are updated.

The central control panel 10 is prepared so that the mold can be efficiently maintained based on the shot cycle and the time cycle so that the operation rate of the injection molding apparatus 20 does not decrease. In the die replacement control, the die replacement work is instructed based on the production schedule input by the production schedule input means and stored in the information storage means 12. When the production is terminated, the injection molding device 20 and each means 30, 40, and
If the 50 is instructed to end the production and the production is to be continued, the information stored in the die storage means 50 is stored in the die storage means 50.
Inspection result history data stored in 12 is statistically processed to select the optimum mold type. Further, the mold ID is transmitted to the mold transfer device 70 to instruct to insert the mold, and the molding condition corresponding to the mold is transmitted to the injection molding device 20.

Although the maintenance of the mold is subdivided into a plurality of maintenance items and the maintenance and inspection corresponding to each maintenance item are described, the maintenance of the mold need not be subdivided. Next, the management system of this embodiment will be described with reference to FIGS. 2 and 3. FIG. 2 is a flow chart showing the mold replacement control processing, and FIG. 3 is a flow chart showing the maintenance list creation processing.

In FIG. 2, when the number of molding shots has reached the shot cycle, when the time from the last maintenance to the present has reached the time cycle, the quality of the molded molded product deteriorates. If a tendency is recognized and the cause is a mold, or if the injection molding machine 20
The defect rate of the mold that has been thrown into the, the occurrence rate of each defective item or if it is out of the preset range for the physical property value, in any of the cases, the central control panel 10 requires maintenance of the mold. The judgment is made and the mold replacement control is started.

The central control panel 10 instructs the mold transfer controller 60 to transfer the mold, which must be replaced in any of the above cases, to the maintenance means 40 (step P11), and sets the allowable number of molding shots and the allowable molding time. Calculate (Step P1
2). At this time, the allowable molding cycle with the allowable number of molding shots and the allowable molding time is compared with the minimum maintenance cycle of the minimum shot cycle and the shortest time cycle. Create a maintenance list that requires maintenance (Step P
13), and transmits the maintenance list to the maintenance means 40 (step P14). Thereafter, the production schedule stored in the information storage means 12 is referred to, and it is confirmed whether or not the production is to be terminated (step P15). When the production is to be terminated, the current process is terminated. On the other hand, if the production is to be continued, the number of molds that need to be replaced is confirmed (step P16). If the number of molds is one, the process proceeds to step P18, and it is confirmed that a plurality of molds need to be replaced. In this case, the optimum die is selected based on the production schedule and the die to be put in is determined (step P17). The mold transfer controller 60 is instructed to transfer the mold from the mold storing means 50 to the injection molding device 20 (step P18), and the molding conditions corresponding to the mold are transmitted to the injection molding device 20 (step P18). (P19), the current process ends.

Further, the maintenance list creating process in step P13 of FIG. 2 is specifically shown in FIG. The number of maintenance items for performing die maintenance is n, and 0 is substituted for the n (step P21). And
It is confirmed whether or not there is an allowable molding cycle smaller than the minimum maintenance cycle for each maintenance item (step P22). When an allowable molding cycle smaller than the minimum maintenance cycle is confirmed, the item is added to the maintenance list, and when there is no allowable molding cycle smaller than the minimum maintenance cycle, the process directly proceeds to the next process (step P23), and n = n + 1 is processed. Is performed (step P24). After that, the same confirmation as in step P22 is performed, and if an allowable molding cycle smaller than the minimum maintenance cycle is confirmed, the process returns to step P22, but if not confirmed, this process ends (step P25).

In this way, in this embodiment, the central control panel 10 compares the maintenance time cycle for each mold with the time elapsed since the last maintenance at a constant cycle or a predetermined cycle and If the time has reached the maintenance cycle, or if the maintenance shot cycle for each mold and the actual number of molding shots are compared and the actual number of molding shots has reached the maintenance shot cycle, production The transfer controller 60 is instructed to transfer the mold to the maintenance means 40 based on the input information from the schedule input means. Therefore, it is possible to manage the number of molding shots for each mold and the period required for maintenance depending on the elapsed time from the previous maintenance, and it is possible to reliably perform maintenance without disturbing the production schedule. As a result, the non-defective rate of molded products can be improved, and the productivity of the injection molding device 20 can be improved. In addition, the maintenance time cycle and maintenance shot cycle are subdivided to correspond to multiple maintenance items for each mold, and the time elapsed since the previous maintenance and the number of molding shots are compared. , It is possible to manage the cycle that requires maintenance for each maintenance item, replace the mold for each minimum maintenance molding number, and perform maintenance when necessary for required items. The productivity of the injection molding device 20 can be improved.

Further, the central control panel 10 refers to the corresponding maintenance shot cycle or the maintenance time cycle for each maintenance item subdivided for each mold, and performs maintenance with a preset number of molding shots or a preset time. Is selected, and the corresponding maintenance item instructs the maintenance means 40, so that the maintenance efficiency of the maintenance means 40 can be improved.

Further, when the central control panel 10 finds that the quality of the molded product tends to deteriorate based on the inspection result data output from the inspection means 30, and when the mold inserted into the injection molding apparatus 20 is defective. When the rate, the occurrence rate for each defective item, or the physical property value is out of a preset range, the transfer controller 60 is instructed to transfer the mold to the maintenance means 40 to replace the mold. Therefore, the deterioration of the quality of the mold can be grasped, and the mold can be exchanged before the number of defective products increases, which improves the yield rate of the molded products and improves the productivity of the injection molding apparatus 20. be able to.

Further, since the maintenance shot cycle and the maintenance time cycle for each mold are changed based on the statistics of the inspection history data stored in the information storage means 12, the cycle in which maintenance is required for each mold. Can be set to an appropriate value, and the mold can be maintained at a suitable timing. Furthermore, by changing the maintenance shot cycle and maintenance time cycle for each mold for multiple maintenance items, it is possible to set the cycle that requires maintenance for each maintenance item for each mold to an appropriate value. The mold can be maintained at a suitable timing corresponding to each item.

Furthermore, based on the maintenance time cycle and maintenance shot cycle for each mold,
Since the production schedule is created, it is possible to prevent the productivity from being lowered due to the die maintenance. Based on the inspection information stored in the information storage means 12, the central control panel 10 selects a die for forming a molded product of high quality from the dies stored in the die storage means 50, Since the mold is put into the injection molding device, the quality of the molded product can be improved and the productivity of the injection molding device 20 can be improved.

[0037]

According to the first aspect of the present invention, when the elapsed time since the control means performed the maintenance last time has reached the maintenance cycle, or the actual number of molding shots has reached the maintenance shot cycle. In this case, since the die transfer is instructed based on the production schedule, the number of molding shots for each die and the cycle required for maintenance depending on the elapsed time from the last maintenance are managed and the production schedule is set. Maintenance can be reliably performed without hindrance, and the yield rate of molded products can be improved. As a result, the productivity of the injection molding device can be improved.

According to the second aspect of the present invention, the mold is replaced when the control means recognizes the deterioration tendency of the quality of the molded product based on the inspection history data, so that the deterioration tendency of the mold quality is grasped. However, the mold can be exchanged before the molding of defective products increases, and the yield rate of molded products can be improved. As a result, the productivity of the injection molding device can be improved.

According to the third aspect of the present invention, the maintenance shot cycle or the maintenance time cycle for each mold is changed based on the statistics of the inspection history data. The value can be set to an appropriate value, and the mold can be maintained at a suitable timing. According to the invention described in claim 4, when the control means has reached a maintenance shot cycle in which the number of molding shots for each mold reaches a maintenance shot cycle corresponding to a plurality of maintenance items, or since the last maintenance has been performed If the time has reached the maintenance cycle for multiple maintenance items,
Since the transfer of molds is instructed based on the production schedule, it is possible to manage the cycle that requires maintenance for each maintenance item depending on the number of molding shots and the elapsed time since the last maintenance was performed for each mold. Therefore, it is possible to reliably perform maintenance without hindering the production schedule, and improve the yield rate of molded products. As a result, the productivity of the injection molding device can be improved.

According to the invention of claim 5, the maintenance shot cycle or the maintenance time cycle for each mold is changed for each of a plurality of maintenance items based on the statistics of the inspection result history data. The cycle that requires maintenance for each item can be set to an appropriate value, and the mold maintenance can be performed at a suitable timing.

According to the sixth aspect of the present invention, since the production schedule is created based on the maintenance shot cycle and the maintenance time cycle for each die, it is possible to reduce productivity due to die maintenance. It can be prevented in advance. According to the invention described in claim 7, since the control means selects the mold having excellent quality based on the inspection information and the mold is put into the injection molding apparatus, the mold having high quality is always put. Therefore, the quality of the molded product can be improved.

According to the eighth aspect of the present invention, the control means selects a maintenance item requiring maintenance for a predetermined number of molding shots or a predetermined time, and instructs the corresponding item to the maintenance means. The efficiency of maintenance of the maintenance means can be improved.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram showing an embodiment of a management system for an injection molding apparatus according to the present invention.

FIG. 2 is a flowchart showing a processing procedure of mold replacement control of the management system.

FIG. 3 is a flowchart showing a maintenance list creation procedure in the processing procedure.

[Explanation of symbols]

 10 Central control panel (control means) 11 Input device (input means) 12 Information storage means 20 Injection molding device 30 Inspection means 40 Maintenance means 50 Mold storage means 60 Mold transfer controller 70 Mold transfer device (mold transfer means)

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Mitsunobu Suwa 1-3-6 Nakamagome, Ota-ku, Tokyo Inside Ricoh Co., Ltd.

Claims (8)

[Claims] 1. An injection molding system that manages an injection molding apparatus that performs an injection molding operation using a plurality of molds, the injection molding apparatus having an injection molding machine that performs the injection molding operation on the molds, and the maintenance of the molds. Maintenance means for carrying out the above, a mold storing means for storing a plurality of molds before or after injection molding, a mold for transferring the mold between the injection molding device, the maintenance means, and the mold storing means. Mold transfer means, production schedule input means for inputting the production schedule of molded articles, and set according to each mold,
A shot cycle input means that inputs a maintenance shot cycle, which is a cycle that depends on the number of molding shots that requires maintenance, and maintenance is required depending on the elapsed time from the last maintenance that is set for each mold. A time cycle input means for inputting a maintenance time cycle, and history data input means for inputting the maintenance result for each mold sent from the maintenance means as maintenance history data,
In addition to the production schedule, maintenance shot cycle, maintenance time cycle, maintenance history data input to each of the input means, information storage means for storing the number of molding shots for each mold input from the injection molding device, Control information for inputting information from each input means and operating the transfer means in accordance with the input information to control the transfer of the mold; The maintenance time cycle for each mold is compared with the elapsed time from the previous maintenance, and when the elapsed time reaches the maintenance cycle, or the maintenance shot cycle for each mold and the actual number of molding shots When the actual number of molding shots has reached the maintenance shot cycle, Management system of the injection molding apparatus characterized by instructing the transfer of the mold to the transport means based on input information from the schedule input means. 2. An inspection means for inspecting a molded product molded by the injection molding apparatus is provided, and when the control means recognizes a deterioration tendency of the quality of the molded product based on the detection information from the inspection means, The injection molding system management system according to claim 1, wherein the molds are replaced by instructing the transfer means to transfer the molds. 3. The maintenance shot cycle for each mold is made to store the output information of the inspection means as inspection history data in the information storage means, and based on the statistics of the inspection history data stored in the information storage means. The management system for the injection molding apparatus according to claim 2, wherein the maintenance time cycle is changed. 4. The maintenance of the mold is subdivided into a plurality of maintenance items, and the maintenance shot cycle and the maintenance time cycle are subdivided so as to correspond to the maintenance items and added to the information storage means. The control means compares a maintenance shot cycle corresponding to a plurality of maintenance items for each mold with a record of the number of molding shots at a fixed cycle or a predetermined cycle, and the record of the number of shots reaches the maintenance shot cycle. Or the maintenance time cycle corresponding to multiple maintenance items for each mold is compared with the elapsed time since the last maintenance, and the elapsed time has reached the maintenance cycle, the production schedule Based on input information from input means Management system of the injection molding apparatus characterized by instructing the transfer of the mold to the transport means. 5. The control means is provided with an item data input means for inputting output information of the inspection means and maintenance-related item data corresponding to a maintenance item, and an item data storage means for storing the data input to the input means. Add the output information of the inspection means to the information of the information storage means as inspection result history data, and based on the statistics of the inspection result history data stored in the information storage means, molds for each of a plurality of maintenance items. The management system for an injection molding apparatus according to claim 4, wherein the maintenance shot cycle and the maintenance time cycle are changed for each. 6. Based on the maintenance shot cycle and the maintenance time cycle for each mold,
The management system for an injection molding apparatus according to claim 1, further comprising a production schedule creating unit that creates a production schedule. 7. The mold for molding a high-quality molded product from the molds stored in the mold storage means based on the inspection information stored in the information storage means, by the control means. 7. The management system for an injection molding apparatus according to claim 2, wherein the mold is selected and the mold is put into the injection molding apparatus. 8. The control means refers to a corresponding maintenance shot cycle or the maintenance time cycle for each maintenance item subdivided for each mold, and sets a predetermined number of molding shots or a predetermined time. The management system for an injection molding apparatus according to claim 1, wherein an item requiring maintenance is selected and a corresponding maintenance item is instructed to the maintenance means.