Display system of production plan of molded article

Abstract

To provide a technique capable of suppressing retardation of production when changing a production plan of a molded article.SOLUTION: A display system of a production plan of a molded article includes: a display part for displaying an image plane expressing a production plan of the molded article of respective categories, where information concerning molded articles of respective categories are displayed according to a priority order of changing the production plan on the image plane, the priority order is determined according to information concerning production time limits of molded articles of respective categories, information concerning inventories of molded articles of respective categories, and information concerning production states of molded articles of respective categories.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure relates to a production plan display system for molded products. [Background technology]

[0002] Regarding production planning for molded products, for example, Patent Document 1 describes how, when producing a certain type of product, a production plan is created by sequentially selecting the equipment that is most suitable for that type from among available equipment, determining whether the selected equipment is capable of switching the type of product and whether the molds required for production are available, and allocating products one day at a time from the first day to the last day of the allocation period. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 6-231136 Summary of the Invention [Problem to be solved by the invention]

[0004] In actual molding sites, production plans may need to be revised due to sudden changes in delivery dates from clients, changes in order quantities, production delays due to equipment malfunctions, etc. In such cases, simply considering the availability of equipment may not allow the production of molded products to meet delivery dates. Therefore, there is a demand for technology that can prevent production delays caused by changes in production plans. [Means for solving the problem]

[0005] According to one aspect of the present disclosure, there is provided a production plan display system for molded products, the production plan display system including a display unit that displays a screen showing production plans for a plurality of types of molded products, and information about each of the types of molded products arranged on the screen according to a priority for changing the production plan, the priority being determined according to information about the production deadline for each of the types of molded products, information about the inventory of each of the types of molded products, and information about the production status of each of the types of molded products. [Brief explanation of the drawings]

[0006] [Figure 1] FIG. 1 is an explanatory diagram showing a schematic configuration of a production plan display system. [Figure 2] FIG. 10 is a diagram illustrating an example of a production planning screen. [Figure 3] 10 is a flowchart of a priority area generation process. [Figure 4] FIG. 10 is a diagram illustrating a method for calculating a priority. [Figure 5] FIG. 10 is a diagram illustrating a method for calculating a priority. [Figure 6] 10 is a flowchart of a production plan edit area generation process. [Figure 7] 10 is a flowchart of a production days display process. [Figure 8] FIG. 10 is an explanatory diagram showing the production plan screen after the production plan has been changed. [Figure 9] FIG. 10 is an explanatory diagram showing another example of the production plan screen after the production plan has been changed. DETAILED DESCRIPTION OF THE INVENTION

[0007] A. First embodiment: FIG. 1 is an explanatory diagram showing a schematic configuration of a production plan display system 10 in a first embodiment. The production plan display system 10 includes a management device 500 and a terminal device 400. A first molding machine 110, a second molding machine 120, a third molding machine 130, and the terminal device 400 are communicably connected to the management device 500. In this embodiment, the management device 500 is configured to be able to communicate with these devices via a network NT. The network NT may be, for example, a LAN, a WAN, or the Internet. The management device 500 is also called a server.

[0008] In this embodiment, the first molding machine 110 is a device that performs injection molding. The first molding machine 110 is equipped with a first control unit 111, an injection device, and a mold clamping device, neither of which are shown. A first molding die 112 having a cavity is attached to the mold clamping device. In this embodiment, the first molding die 112 is a metal mold. The first molding die 112 may be made of ceramic or resin. A material dryer that dries the material and an inspection device that inspects the molded product may be connected to the first molding machine 110.

[0009] The first control unit 111 is configured by a computer that includes one or more processors, a storage device, and an input / output interface that inputs and outputs signals to and from the outside.

[0010] The first control unit 111 controls each unit of the first molding machine 110 to perform injection molding and form a molded product. More specifically, the first control unit 111 controls the mold clamping device to clamp the mold, and controls the injection device to plasticize the material and inject it into the mold, thereby forming a molded product having a shape corresponding to the shape of the cavity provided in the mold.

[0011] The first control unit 111 can transmit physical quantity information indicating physical quantities related to injection molding to the management device 500. The physical quantity information includes measurement values ​​measured by various sensors provided in the first molding machine 110 and various command values ​​related to injection molding. The command values ​​are values ​​set in the first molding machine 110, such as the injection filling time, injection pressure, and set temperature, and the measurement values ​​are values ​​obtained by measuring these actual values ​​using sensors. In the management device 500, a processing unit 501 provided in the management device 500 may record statistical values ​​and history of the physical quantity information in a storage unit 502.

[0012] The second molding machine 120 is equipped with a second control unit 121. The third molding machine 130 is equipped with a third control unit 131. A second molding die 122 is attached to the clamping device of the second molding machine 120. A third molding die 132 is attached to the clamping device of the third molding machine 130. The second molding machine 120 and the third molding machine 130 have the same configuration as the first molding machine 110. Furthermore, the second control unit 121 and the third control unit 131 have the same configuration as the first control unit 111. Therefore, detailed descriptions of these molding machines and control units will be omitted. Below, when the molding machines 110, 120, and 130 are referred to without distinction, they will simply be referred to as molding machines 100. Note that the number of molding machines 100 connected to the management device 500 is not limited to three, but one, two, or four or more molding machines 100 may also be connected.

[0013] The terminal device 400 is configured as a computer including one or more processors, a storage device, and a display unit 450. Examples of the terminal device 400 that can be used include a tablet terminal, a laptop computer, a smartphone, and a handheld terminal. The display unit 450 displays various screens received from the management device 500. In this embodiment, the display unit 450 has a touch panel function.

[0014] The management device 500 is configured by a computer including a processing unit 501, a storage unit 502, and a communication control unit 503. The processing unit 501 includes one or more processors and a main storage unit. The storage unit 502 includes an auxiliary storage unit such as a hard disk drive. The communication control unit 503 includes a communication circuit for controlling communication with other devices such as the molding machine 100 and the terminal device 400.

[0015] Processing unit 501 includes information acquisition unit 510 and screen generation unit 520. Information acquisition unit 510 and screen generation unit 520 are realized by processing unit 501 executing a program stored in storage unit 502. Note that these functions may be realized by a combination of multiple circuits.

[0016] The information acquiring unit 510 acquires various pieces of information from the molding machine 100. Furthermore, the information acquiring unit 510 acquires from the terminal device 400 information relating to operations performed on the terminal device 400 by the user.

[0017] The storage unit 502 stores production plan data that represents a production plan for molded products. The production plan data includes, for example, type information that represents the type of molded product to be produced, priority, production deadline information, inventory information, production status information, production difficulty information, operation schedule information for the molding dies and molding machines, and maintenance information for the molding dies and molding machines. The production status information includes information on the operation status of the molding machines and molding dies, and information on defects in molded products. Details of this information will be described later. In addition to this information, the storage unit 502 also stores all of the information used to display the production plan screen SC1, which will be described later.

[0018] The screen generation unit 520 generates a production plan screen that shows a production plan for molded products based on the information stored in the storage unit 502. The screen generation unit 520 transmits the generated screen to the terminal device 400. The terminal device 400 acquires the screen generated by the screen generation unit 520 and displays the screen on the display unit 450.

[0019] FIG. 2 is a diagram showing an example of a production plan screen SC1 generated by the screen generation unit 520 and displayed on the display unit 450. The production plan screen SC1 is a screen for displaying production plans for multiple types of molded products. In this embodiment, the production plan screen SC1 has a priority order area AR1 and a production plan editing area AR2. The priority order area AR1 is an area that displays information about multiple types of molded products according to the priority order for changing the production plan. The production plan editing area AR2 is an area that displays an editable production plan for the molded products specified in the priority order area AR1. In this embodiment, the priority order area AR1 and the production plan editing area AR2 are displayed on the same screen, but they may be displayed on separate screens or separate display units. Furthermore, the display of the production plan editing area AR2 is optional, and only the priority order area AR1 may be displayed.

[0020] In the priority order area AR1, "type information", "production progress rate", "priority" and "production status" are displayed in association with each other.

[0021] "Type information" indicates the type of molded product molded by the molding machine 100. In FIG. 2, four types of type information are shown: "gear," "button," "cover," and "cap." This type information may also indicate the lot or order origin of the molded product. In other words, even if the molded product is the same, if the lot or order origin is different, it may be classified as a different type of molded product.

[0022] "Production progress rate" indicates the ratio of the current production volume to the planned shipping volume for that month for each type of molded product. The production progress rate may also be expressed by year or day instead of month.

[0023] "Priority" is information regarding the order of precedence for changing the production plan. In Fig. 2, the priorities are shown in descending order of priority as "Extra High," "High," "Medium," and "Low." The higher the priority, the greater the need to change the production plan. For example, in the example shown in Fig. 2, "gear" has the highest priority. In the example shown in Fig. 2, each piece of information is arranged in order of priority, with the type of molded product with a higher priority being positioned higher on the screen.

[0024] The "production status" column chronologically displays the operating status of each molding machine from the beginning to the end of the month. Figure 2 shows three operating statuses for molding machines: "setup," "production," and "abnormal shutdown." "Setup" indicates that preparations for operating the molding machine, such as changing molds or materials, have been made on that day. "Production" indicates that a molded product was produced on that day. "Abnormal shutdown" indicates that the molding machine 110 abnormally stopped on that day. In the production status display area, the scheduled shipping date is indicated by a star next to the corresponding date, and the scheduled shipping quantity is displayed in association with the scheduled shipping date. When multiple molding machines are used for one "type information," the operating status of each molding machine may be displayed chronologically, or the average operating status of each molding machine may be displayed. The period used to display the production status may be years or days, rather than months.

[0025] In the production plan editing area AR2, "type information," "production schedule information," and "manufacturing information" are displayed in association with each other. The production schedule information is also called "shipping information."

[0026] "Type information" is information about the type of molded product for which the production plan is to be changed. In Figure 2, the type of molded product is shown as "gear."

[0027] "Production plan information" is information about the planned production of molded products. The production plan information includes, in association with information about the type of molded product, the "order quantity," the "scheduled shipping date," the "remaining days" until the scheduled shipping date, the current "inventory quantity," the current "shortage quantity," and the "required production days" that indicates the number of days required to produce the shortage of molded products. In this way, the production plan information includes information about time, such as the scheduled shipping date and remaining days, and information about quantity, such as the order quantity.

[0028] The "manufacturing information" includes, in association with information on the type of molded product, the "process name," "number of days to complete the process," "molding machine information," "first mold information," "second mold information," "cycle time," "production capacity information," "setup information," and "maintenance information."

[0029] "Process name" indicates the name of the process for producing a molded product. This process name is shown as "Molding" in Figure 2. "Process completion days" indicates the number of days it will take to complete the process. In the example shown in Figure 2, the molded product is produced only through the molding process. Therefore, the number of required production days included in the production schedule information is the same as the number of days it will take to complete the process.

[0030] "Molding machine information" is information about molding machines capable of producing the molded product shown in "Type information." Figure 2 shows three molding machines, "A-1," "A-2," and "A-3," that are capable of producing a "gear." These three molding machines correspond, for example, to the first molding machine 110, second molding machine 120, and third molding machine 130 shown in Figure 1.

[0031] "First molding die information" is information about molding die capable of producing the molded product shown in "type information." On the production planning screen SC1, "first molding die information" is displayed in correspondence with "molding machine information." In FIG. 2, three types of molding die, "Gear 1," "Gear 2," and "Gear 3," are displayed as first molding die information for molding machine "A-1." Furthermore, two types of molding die, "Gear 1" and "Gear 2," are displayed as first molding die information for molding machine "A-2." Furthermore, two types of molding die, "Gear 1" and "Gear 3," are displayed in correspondence with molding machine "A-3" as first molding die information.

[0032] In the production planning screen SC1 shown in FIG. 2, the molding machine "A-2" is not associated with the molding die "Gear 3," and the molding machine "A-3" is not associated with the molding die "Gear 2." These combinations are known in advance to have a high defect rate due to individual differences in the molding machines or molding dies, and are therefore excluded from the user's options and are therefore not displayed on the production planning screen SC1. Note that in other embodiments, all combinations may be displayed without pre-excluding combinations with high defect rates from the options. In this case, the defect rate for each combination may be displayed on the production planning screen SC1 or another screen, allowing the user to determine the combination.

[0033] The "second molding machine information" is information about the molding mold attached to the corresponding molding machine. The second molding mold information is displayed to correspond to the first molding mold information. Figure 2 shows that molding machine "A-1" is equipped with molding mold "Gear 1," and molding machine "A-2" is equipped with molding mold "Gear 2." Both "Gear 1" and "Gear 2" are molding molds for molding "gears," but they have different numbers of cavities. The number of cavities refers to the number of molded products molded using that mold in one molding process. On the production planning screen SC1, the molding mold "Gear 1" attached to molding machine "A-1" is included in the first molding mold information corresponding to molding machine "A-1," and the molding mold "Gear 2" attached to molding machine "A-2" is included in the first molding mold information corresponding to molding machine "A-2." Note that "Gear 1" and "Gear 2" can have the same number of cavities as long as they are both molding molds for molding "gears."

[0034] FIG. 2 shows that molding machine "A-3" is equipped with molding die "Case 1." While this molding die "Case 1" is not specifically designed to mold gears, it is a molding die that can be attached to molding machine "A-3" and is used to mold cases as molded products. In this embodiment, in order to simulate a production plan in which the molding die is changed, the second molding die information is displayed on production plan screen SC1 in a manner that allows the user to change it. For example, in FIG. 2, drop-down list L1 displays molding die "Case 1," molding die "Gear 1," and molding die "Gear 3" as selectable options.

[0035] "Cycle time" represents the time required for one molding process using a molding machine equipped with the molding mold represented in the second molding information.

[0036] "Production capacity information" indicates the number of molded products that can be molded per day. The production capacity information is determined by the number of molds and cycle time indicated in the second mold information, and the operating hours of the molding machine per day.

[0037] "Setup information" is information related to the setup for operating the molding machine. The setup information shown in Figure 2 indicates the time required to replace the molding mold indicated in the second molding mold information and operate the molding machine. The setup information is displayed in accordance with the molding machine information. Figure 2 shows that the setup time required to replace the molding mold "Case 1" attached to molding machine "A-3" with another molding mold is "5 hours."

[0038] "Maintenance information" is information related to the maintenance of the molding machine or mold. In this embodiment, the maintenance information indicates the time required for maintenance of the molding machine or mold until the scheduled shipping date. In Figure 2, the maintenance time for the mold "Gear 1" installed in the molding machine "A-1" is shown as "6 hours."

[0039] In the production plan editing area AR2, check boxes C1 are arranged to correspond to each molding machine information and to select the molding machine to be used to produce the molded product. When the user operates the display unit 450 of the terminal device 400 to check one of these check boxes C1, the number of days to complete the process and the number of days required to produce the molded product in the production schedule information are updated to the information for when the molded product is molded using the checked molding machine. For example, if the check boxes C1 for all three molding machines are checked, the number of days to complete the process and the number of days required to produce the molded product when the molded product is molded using the three molding machines are displayed. In other words, in this embodiment, when molding machine information is selected from multiple molding machine information in the production plan editing area AR2, the production schedule information is updated based on the selected molding machine information.

[0040] 3 is a flowchart of the priority order area generation process executed by the processing unit 501 of the management device 500. This process is for displaying the priority order area AR1 in the production plan screen SC1, and is executed when the production plan screen SC1 is initially displayed, when the production plan is changed, when the display period for the production status is changed, etc.

[0041] In step S100, the processing unit 501 receives a request to update the priority order area AR1 in response to a user operation on the display unit 450 or in response to internal processing of the processing unit.

[0042] In step S110, the processing unit 501 acquires from the memory unit 502 various information to be used in calculating the priority, such as order information including the planned shipping quantity, inventory information of molded products, the operating status of each molding machine and mold, and information on the type of molded product.

[0043] In step S120, the processing unit 501 calculates the priority for each component type using the information acquired in step S110. The method for calculating the priority will be described later.

[0044] In step S130, the screen generation unit 520 of the processing unit 501 arranges the type information in accordance with the priority calculated in step S120 to generate the priority order area AR1 shown in Fig. 2. Then, the screen generation unit 520 generates a production plan screen SC1 including the priority order area AR1 and displays it on the display unit 450 of the terminal device 400.

[0045] 4 and 5 are diagrams for explaining a method for calculating the priority. In step S120, the processing unit 501 multiplies the score of each index shown in No. 1 to No. 6 in Fig. 4 by a weighting factor determined for each index, and calculates the sum of these values ​​as the priority.

[0046] As shown in FIG. 4, in this embodiment, information on "stock," "production status," "production difficulty," "production deadline," "defective," and "operation status" is used as the index for calculating the priority.

[0047] The processing unit 501 determines the score for "inventory" as follows: First, the ratio of the available inventory, which is the sum of warehouse inventory and in-process inventory, to the scheduled shipping quantity is calculated according to the calculation formula shown in FIG. 4. Then, a score between 1 and 5 is determined so that the value increases as the value approaches 0% from 100%. In the example shown in FIG. 4, the weight multiplied by the score for inventory information is 1. Note that the score may be calculated based on the available inventory, which is the actual inventory minus the quantity allocated for orders, instead of the available inventory.

[0048] The processing unit 501 determines the score for "production status" as follows: First, according to the calculation formula shown in Fig. 4, it calculates the ratio of the cumulative production results from the time the shipping plan was imported to today to the cumulative value in the production plan from the beginning of the month to today. Then it determines a score from 1 to 5 so that the score increases as the value approaches 0% from 100%. In the example shown in Fig. 4, the weight multiplied by the score for production status is 2.

[0049] Processing unit 501 determines the score for "production difficulty" as follows: First, the time from the start of setup to the start of lot production is calculated based on the past year's actual results, according to the calculation formula shown in FIG. 4. Then, a score from 1 to 5 is determined so that the score increases as the time approaches 0 hours to 4 hours. In the example shown in FIG. 4, the weight multiplied by the score for production difficulty is 1. Note that the score for production difficulty may also be determined according to factors such as the number of steps required to determine production conditions for the molded product, the level of quality required for the molded product, the size of the mold, the complexity of the shape of the molded product, the number of inspection items, etc.

[0050] The processing unit 501 determines the score for the "production deadline" as follows: First, the number of days from today until the scheduled shipping date is calculated according to the calculation formula shown in FIG. 4. Then, a score from 1 to 5 is determined so that the score increases as the number of days approaches 1 day from 30 days. In the example shown in FIG. 4, the weight multiplied by the score for the production deadline is 1.

[0051] Processing unit 501 determines the score for "defects" as follows: First, the ratio of the number of defects to the number of production units in each lot, that is, the average defect rate over one year, is calculated according to the calculation formula shown in FIG. 4. Then, a score from 1 to 5 is determined so that the score increases as the value approaches 0 PPM (Parts Per Million) to 7000 PPM. In the example shown in FIG. 4, the weight multiplied by the score for defects is 1. Note that the score for defects may also be calculated according to the combination of molding machine and molding die, the combination of molding machine and material lot, or the combination of molding die and material lot.

[0052] The processing unit 501 determines the score for the "operational status" as follows: First, the ratio of abnormal stoppage time from the beginning of the month to the current day to the cumulative production planned time from the beginning of the month to the current day is calculated according to the calculation formula shown in FIG. 4. Then, the score is determined from 1 to 5 so that the score increases as the value approaches 0% to 100%. In the example shown in FIG. 4, the weight multiplied by the score for the operational status is 1.

[0053] The processing unit 501 multiplies the score of each index calculated as described above by a weight determined for each index, and calculates the value obtained by adding them up as the priority. The higher the priority calculated in this way, the more likely production delays are to occur, indicating a greater need to review the production plan.

[0054] In this embodiment, the processing unit 501 adjusts the weight by which each index is multiplied when calculating the priority. The processing unit 501 uses the indexes Nos. 7 to 9 in FIG. 5 to calculate the coefficient for adjusting the weight.

[0055] As shown in FIG. 5, in this embodiment, information on "molding mold operation schedule," "molding machine operation schedule," and "maintenance" is used as the index for adjusting the weight.

[0056] Processing unit 501 determines the coefficient related to the "molding mold operation schedule" as follows. First, in accordance with the calculation formula shown in FIG. 5, the ratio of the total planned production time of molding molds that are capable of molding the type of molded product to be produced but are not in use between today and the scheduled shipping date to the value obtained by multiplying the planned production time from today to the scheduled shipping date by the number of molding molds is calculated. Then, a coefficient ranging from 1 to 2 is determined so that the coefficient value increases as the value of this ratio increases. Then, the coefficient is multiplied by the weight associated with the molding mold operation schedule. In the example shown in FIG. 5, the weight multiplied by the coefficient related to the molding mold operation schedule is 1.25.

[0057] The processing unit 501 determines the coefficient for the "molding machine operation schedule" as follows. First, according to the calculation formula shown in FIG. 5, the ratio of the total planned production time of molding machines that are capable of molding the molded product type to be produced but are not in use between today and the scheduled shipping date to the value obtained by multiplying the planned production time from today to the scheduled shipping date by the number of molding machines is calculated. Then, a coefficient ranging from 1 to 2 is determined so that the coefficient value increases as the ratio increases. The coefficient is then multiplied by a weight associated with the molding machine operation schedule. In the example shown in FIG. 5, the weight multiplied by the coefficient for the molding machine operation schedule is 1. As described above, the weight multiplied by the coefficient for the mold operation schedule is 1.25. Therefore, in this embodiment, when calculating the priority, the weight of the mold operation schedule is greater than the weight of the molding machine operation schedule. Note that only one of the "molding mold operation schedule" and the "molding machine operation schedule" may be used as an index.

[0058] Processing unit 501 determines the coefficient for "maintenance" as follows: First, the ratio of maintenance time to the cumulative planned production time from today until the scheduled shipping date is calculated according to the calculation formula shown in FIG. 5. Then, a coefficient between 1 and 2 is determined so that the coefficient value increases as the ratio value increases. Then, the coefficient is multiplied by the weight associated with maintenance. In the example shown in FIG. 5, the weight multiplied by the coefficient for maintenance is 1. Maintenance time includes either or both of the molding machine maintenance time and the molding mold maintenance time. If the period during which molding machine maintenance is performed and the period during which molding mold maintenance is performed overlap, the overlapping time is subtracted from the total maintenance time.

[0059] The processing unit 501 multiplies each coefficient calculated for these indexes by one of the weights No. 1 to 6 shown in Fig. 4. In this embodiment, the processing unit 501 multiplies the coefficients calculated for the molding mold operation schedule and molding machine operation schedule by the weights for the production status, defects, and operation status shown in Fig. 4. The processing unit 501 also multiplies the coefficient calculated for maintenance by the weights for the production status and operation status shown in Fig. 4. This makes it possible to determine the priority with greater accuracy.

[0060] 6 is a flowchart of the production plan edit area generation process executed by the processing unit 501. This process is a process for generating the production plan edit area AR2 to be displayed on the production plan screen SC1.

[0061] In step S200, the processing unit 501 receives, through a user operation on the display unit 450, the selection of type information to be subject to a change in the production plan from within the priority order area AR1.

[0062] In step S210, the processing unit 501 acquires from the memory unit 502 various information used to display the production plan editing area AR2, such as order information corresponding to the selected type information, inventory information, and information on the molding machine corresponding to that type.

[0063] In step S220, processing unit 501 obtains, from the molding machine information obtained in step S210, information on the molding mold corresponding to that molding machine from storage unit 502. The correspondence between molding machines and molding molds is stored in storage unit 502 in advance.

[0064] In step S230, processing unit 501 acquires, from storage unit 502, maintenance information for the molding machine and information on the molds attached to the molding machine, based on the molding machine information acquired in step S210.

[0065] In step S240, processing unit 501 acquires, from storage unit 502, maintenance information for the casting mold based on the information about the casting mold acquired in step S220.

[0066] In step S250, the screen generation unit 520 generates a production plan editing area AR2 in which the information acquired by the processing unit 501 in steps S210 to S240 is arranged. The generated production plan editing area AR2 is arranged in the production plan screen SC1 and displayed on the display unit 450 of the terminal device 400.

[0067] 7 is a flowchart of the production days display process executed by the processing unit 501. This process is a process for displaying the required production days in the production plan editing area AR2.

[0068] In step S300, processing unit 501 receives a selection of a molding machine and a molding die from within production plan editing area AR2, based on a user operation on display unit 450.

[0069] In step S310, the processing unit 501 acquires from the storage unit 502 the cycle time corresponding to the molding machine and mold selected in step S300.

[0070] In step S320, the processing unit 501 calculates the number of products produced per day by dividing the total of the operating time per day and the abnormal stop time per day by the cycle time.

[0071] In step S330, the processing unit 501 calculates the number of days for production by dividing the shortage amount obtained by subtracting the inventory amount from the order amount included in the order information by the number of units to be produced per day calculated in step S320.

[0072] In step S340, the screen generation unit 520 arranges the number of production days calculated in step S330 in the production plan editing area AR2 as the number of process completion days and the number of required production days, and causes the display unit 450 to display them.

[0073] FIG. 8 is an explanatory diagram showing the production plan screen SC1 after the production plan has been changed. The production plan editing area AR2 has a Reflect button B1. When the user confirms in the production plan editing area AR2 that the required number of production days has been shortened by the selection of the molding mold or molding machine in the production plan editing area AR2, the user presses the Reflect button B1. Then, when the processing unit 501 detects that the user has pressed the Reflect button B1, the screen generation unit 520 deletes the part type for which the production plan has been changed from the priority order area AR1, as shown in FIG. 8. FIG. 8 shows an example in which the part type "gear" has been deleted from the priority order area AR1.

[0074] According to the production plan display system 10 of the present embodiment described above, information on molded product types is displayed according to priorities determined based on information on molded product production deadlines, information on inventory, and information on production status, allowing users to change molded product production plans according to priorities that take into account not only current inventory but also the current production status, thereby preventing production delays.

[0075] In addition, in this embodiment, the priority is determined taking into account the operating status of the molding machine. For example, even if the molding machine's production capacity allows it to produce the number of units that are in short supply compared to the order quantity, if the operating rate of the molding machine is low, it may not be possible to meet the shipping deadline. Even in such cases, in this embodiment, the operating status of the molding machine is reflected in the priority determination, so production delays can be effectively prevented.

[0076] In addition, in this embodiment, the priority is determined taking into account the defect status of the molded products. For example, even if the molding machine's production capacity allows for the shortage of inventory relative to the ordered quantity, if the number of defects or defect rate is high, it may not be possible to meet the deadline for shipment. Even in such cases, in this embodiment, the defect status of the molded products is reflected in the priority determination, so production delays can be effectively prevented.

[0077] In addition, in this embodiment, part types for which production plans have been changed are deleted from the priority order area AR1 of the production plan screen SC1. For example, in a large-scale molding factory, it is not uncommon for users to change production plans for dozens of types of parts in a single day. Therefore, if part types for which plans have been changed are displayed as they are, it is difficult for users to tell whether the production plan changes have been implemented, and there is a possibility that the production plan for the same molded product will be changed again. In contrast, in this embodiment, part types for which production plans have been changed are deleted from the priority order area AR1, thereby preventing duplicate changes to the production plan for the same molded product. Furthermore, since the amount of information displayed on the production plan screen SC1 can be reduced, the processing load on the screen generation unit 520 and the display unit 450 can be reduced.

[0078] In this embodiment, the priority order area AR1 on the production planning screen SC1 displays the priority order in association with the type of molded product, allowing the user to grasp the production situation in detail, which cannot be recognized from the priority order alone, such as the extent to which there are types with similar priorities. Also, by displaying information related to the priority order, the user can accurately grasp the priority order for each type.

[0079] In addition, in this embodiment, the priority is determined according to the production difficulty of the molded product, so that, for example, the priority of a molded product that takes a long time to set up can be increased, thereby effectively preventing production delays.

[0080] In this embodiment, the priority is determined based on information about the operation schedule of the molding dies and molding machines, so that it is possible to deal with situations where, for example, when inventory is low, a molding machine that can be fitted with a molding die or there are few idle molding dies is given priority in changing the production plan.

[0081] Information about the mold operation schedule indicates, for example, the amount of time a mold not currently attached to the molding machine will be used until the scheduled shipping date. For example, a situation may arise in which a mold not currently attached to the molding machine is used to produce a black gear while the same mold is being used to produce a white gear. In such a case, even if the mold used for the white gear is damaged and production stops due to low inventory, the production plan cannot be changed because the other mold is being used to produce the black gear, which could result in a shipping delay. Therefore, if an abnormal stop occurs when a mold not currently attached to the molding machine will only be used for a short time until the scheduled shipping date, it is necessary to take measures such as increasing the priority, even if the abnormal stop duration is short. In such a situation, in this embodiment, the mold operation schedule is reflected in the priority determination, thereby effectively preventing production delays.

[0082] Furthermore, information regarding the operation schedule of a molding machine corresponding to a molding die indicates, for example, the time by which a molding machine corresponding to the molding die that is not currently producing the target molded product type is scheduled to produce other molded product types before the scheduled shipping date. For example, assume that there is molding machine A producing caps and molding machine B producing gears that correspond to caps but whose production plan has been revised. In this case, if molding machine A abnormally stops and the priority of caps increases, a molding machine other than molding machine A must be selected. However, molding machine B's production plan has already been revised, so the production plan cannot be revised. In such a situation, it is necessary to switch the priority even if the progress rate is relatively high. In such a situation, in this embodiment, the operation schedule of a molding machine corresponding to the molding die is reflected in the priority, thereby effectively preventing production delays.

[0083] Furthermore, in this embodiment, the priority is determined by assigning a higher weight to information regarding the operation schedule of the molding mold than to information regarding the operation schedule of the molding machine corresponding to the molding mold. For example, even if a molding machine corresponding to a molding mold is not available in the company's own factory, molded products can be produced using a molding machine at a subsidiary or outsourced company. However, if there are no surplus corresponding molding molds, this cannot be handled by outsourcing, etc. Therefore, by assigning a higher weight to information regarding the operation schedule of the molding mold than to information regarding the operation schedule of the molding machine, it is possible to handle such situations and effectively prevent production delays.

[0084] In this embodiment, the priority is determined based on information related to mold or molding machine maintenance. For example, as production progresses, unexpected maintenance such as replacing molding machine parts or cleaning the mold may occur in addition to scheduled maintenance, and the planned production volume may fall short due to the amount of maintenance work required. However, in this embodiment, by determining the priority based on mold or molding machine maintenance, production delays can be effectively prevented.

[0085] B. Other Embodiments: (B1) In the above embodiment, the production plan screen SC1 displays the priority of each molded product in association with its type information. However, the priority does not have to be displayed on the production plan screen SC1. Even in this case, the user can grasp the priority of each product as long as the type information is displayed in order of priority.

[0086] (B2) In the above embodiment, the priority is determined using the various indices shown in Figures 3 and 4. However, it is not necessary to use all of these indices; it is sufficient to determine the priority using at least information regarding the production deadline of the molded product, information regarding the inventory of the molded product, and information regarding the production status of the molded product. Furthermore, the method of calculating the priority is not limited to the calculation method in the above embodiment. For example, the points of each index shown in Figures 4 and 5 may be multiplied rather than added. Furthermore, it is not necessary to weight the points of each index.

[0087] (B3) In the above embodiment, the screen generation unit 520 deletes the part types for which the production plan has been changed from the production plan screen SC1. However, this process is optional, and the screen generation unit 520 does not have to delete the part types. Also, for example, the screen generation unit 520 may delete only the part types whose priority or precedence has increased due to the change in the production plan.

[0088] (B4) In the above embodiment, the display unit 450 serving as an output unit is provided in the terminal device 400. However, the display unit may be provided in the management device 500. In this case, an input device such as a mouse or keyboard may be connected to the management device 500 as an input unit. Furthermore, the functions of the processing unit 501 and the storage unit 502 of the management device 500 may be provided in the terminal device 400.

[0089] (B5) Figure 9 is an explanatory diagram showing another example of the production plan screen SC1 after a production plan has been changed. In the above embodiment, the screen generation unit 520 deletes the part types for which the production plan has been changed from the priority order area AR1. In contrast, the screen generation unit 520 may highlight the part types for which the production plan has been changed relative to other part types. Figure 9 shows an example in which the "gear" display area is highlighted. This makes it easier to understand the types of molded products affected by the change in production plan. Note that the types that are highlighted may be limited to part types whose priority or precedence has increased due to the change in production plan.

[0090] C. Other forms: The present disclosure is not limited to the above-described embodiments and can be realized in various configurations without departing from the spirit thereof. For example, the technical features of the embodiments corresponding to the technical features in each aspect described below can be appropriately replaced or combined to solve some or all of the above-described problems or achieve some or all of the above-described effects. Furthermore, if a technical feature is not described as essential in this specification, it can be appropriately deleted.

[0091] (1) According to one aspect of the present disclosure, there is provided a molded product production plan display system, which includes a display unit that displays a screen showing production plans for a plurality of types of molded products, and on the screen, information about each of the types of molded products is displayed according to a priority for changing the production plan, and the priority is determined according to information about the production deadline for each of the types of molded products, information about the inventory of each of the types of molded products, and information about the production status of each of the types of molded products. According to this embodiment, molded product type information is displayed according to the priority order determined based on information about the production deadline, information about available stock, and information about the production status, so that the production plan for molded products can be changed according to the priority order that takes into account not only the current stock but also the current production status, thereby preventing production delays.

[0092] (2) In the above-described embodiment, the information about the production status may include information about the operating status of the molding machine. According to this embodiment, the operating status of the molding machine can be reflected in the priority order. Therefore, production delays can be effectively prevented.

[0093] (3) In the above embodiment, the information about the production status may include information about defects in molded products. According to this embodiment, the defect status of the molded products can be reflected in the priority order. Therefore, production delays can be effectively prevented.

[0094] (4) In the above embodiment, the screen may not display information about the type of production plan for which the production plan has been changed. This embodiment can prevent duplicate changes to the production plan for the same molded product.

[0095] (5) In the above embodiment, information about the type of molded product for which the production plan has been changed may be highlighted on the screen. In this manner, it is easy to understand the type of molded product affected by the change in the production plan.

[0096] (6) In the above embodiment, the screen may display information about the priority order. With this embodiment, the priority order for each type can be accurately understood.

[0097] (7) In the above embodiment, the priority order may be determined based on information about the difficulty of producing each type of molded product. In this embodiment, the difficulty of producing the molded product can be reflected in the priority order. Therefore, production delays can be effectively prevented.

[0098] (8) In the above embodiment, the priority may be determined based on at least one of information regarding the operation schedule of the molding mold and information regarding the operation schedule of the molding machine corresponding to the molding mold. In this embodiment, the operation schedule of the molding mold or the molding machine can be reflected in the priority. Therefore, production delays can be effectively prevented.

[0099] (9) In the above-described embodiment, the weight of information relating to the operation schedule of the molding mold in determining the priority may be greater than the weight of information relating to the operation schedule of the molding machine corresponding to the molding mold. With this embodiment, production delays can be effectively prevented.

[0100] (10) In the above-described embodiment, the priority order may be determined based on information regarding mold or molding machine maintenance. In this embodiment, the priority order can reflect the mold or molding machine maintenance. Therefore, production delays can be effectively prevented. [Explanation of symbols]

[0101] 10...production plan display system, 100...molding machine, 110...first molding machine, 111...first control unit, 112...first molding die, 120...second molding machine, 121...second control unit, 122...second molding die, 130...third molding machine, 131...third control unit, 132...third molding die, 400...terminal device, 450...display unit, 500...management device, 501...processing unit, 502...storage unit, 503...communication control unit, 510...information acquisition unit, 520...screen generation unit

Claims

1. A molded product production plan display system, a display unit that displays a screen showing a production plan for a plurality of types of molded products; On the screen, information about each of the types of molded products is displayed in accordance with the priority of changing the production plan, The priority order is determined according to information on the production deadline of each of the molded products, information on the inventory of each of the molded products, and information on the production status of each of the molded products. Production plan display system.

2. The production plan display system according to claim 1, A production plan display system, wherein the information on the production status includes information on the operating status of a molding machine.

3. 3. The production plan display system according to claim 1, A production plan display system, wherein the information relating to the production status includes information relating to defects in molded products.

4. The production plan display system according to any one of claims 1 to 3, The production plan display system, wherein information regarding the type for which the production plan has been changed is not displayed on the screen.

5. The production plan display system according to any one of claims 1 to 3, The production plan display system, wherein information relating to the type for which the production plan has been changed is highlighted on the screen.

6. The production plan display system according to any one of claims 1 to 5, The production plan display system displays information about the priority order on the screen.

7. The production plan display system according to any one of claims 1 to 6, The production plan display system determines the priority according to information about the difficulty of producing each type of molded product.

8. The production plan display system according to any one of claims 1 to 7, A production plan display system, wherein the priority is determined based on at least one of information relating to the operation schedule of the molding molds and information relating to the operation schedule of the molding machines corresponding to the molding molds.

9. The production plan display system according to claim 8, A production plan display system, wherein the weight of information relating to the operation schedule of the molding mold is greater in determining the priority order than the weight of information relating to the operation schedule of a molding machine corresponding to the molding mold.

10. The production plan display system according to any one of claims 1 to 9, A production plan display system, wherein the priority is determined according to information regarding maintenance of a molding die or molding machine.

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