JPH04346162A - Production plan table generating device - Google Patents

Abstract

PURPOSE:To provide the production plan table generating device considering the supply capacity of a raw material supplying device of each working time band in the production system equipped with molding lines. CONSTITUTION:A second storage part 14 storing the maximum supply capacity of each raw material supplying device as allowable supply amount of each raw material and a production allocation processing part 22 allocating each product to each molding machine according to the priority order of the production demand, are provided. A using amount calculation part 23 obtaining the maximum using amount for each raw material of the product allocated to each molding machine during a constant period as a net using amount for each raw material of each molding machine during the period and totaling this obtained net using amount for each raw material for the molding machines and an allocation change processing part 25 comparing the total using amount for each raw material with the allowable supply amount for each raw material stored in the second storage part 14 and changing the allocation position of an arbitrary product when the total using amount of the arbitrary raw material exceeds the allowable supply amount, are provided.

Description

[Detailed description of the invention]

[0001] The present invention allows a plurality of products of different types to be simultaneously produced in a plurality of molding lines in parallel, and a molding machine installed in each molding line is selectively fed from a plurality of raw material supply devices. This applies to production systems that are configured to supply raw materials, and more specifically, when the amount of each raw material used during a certain working time exceeds the amount that can be supplied based on the supply capacity of the raw material supply equipment. The present invention relates to a production process plan creation device that performs avoidance processing to prevent the amount of raw materials used from exceeding the supplyable amount.

0002

[Background Art] Recently, with the development of computers and other devices due to advances in semiconductor technology, molding process planning in plastic molding plants, which previously relied on human experience, has become easier.
It is becoming possible to do this using computers.

An example of such a process planning device is an interactive schedule planning device disclosed in Japanese Unexamined Patent Publication No. 162713/1983.

[0004] This interactive schedule planning device inputs the conditions of each given job (work amount, possible start date, delivery date, etc.), and then schedules each job so that the work amount is smoothed out under those conditions. A schedule is created, the schedule is further modified according to instructions from an operator, a final schedule is created, and this schedule is output.

[0005]

[Problems to be Solved by the Invention] However, in the above-mentioned conventional apparatus, only the delivery date is set as a constraint, and constraint conditions that occur during the manufacturing process (for example,
There was a problem in that the supply capacity of the raw material supply device for each work time period, etc.) was not taken into account at all, and a detailed schedule could not be created.

[0006] Furthermore, in the conventional apparatus described above, a schedule is created for a single molding line, and a production system in which a plurality of products of different types are simultaneously produced in parallel on a plurality of molding lines is required. There was also the problem that it could not be applied.

The present invention was made in view of the above circumstances, and its purpose is to improve the man-machine interface and to improve not only the constraints on the sales side such as delivery dates, but also the constraints that occur in the manufacturing process, especially the time required for each work. An object of the present invention is to provide a production process plan creation device that takes into account the supply capacity of a raw material supply device for each band.

[0008]

[Means for Solving the Problems] In order to solve the above-mentioned problems, the production process plan creation device of the present invention allows a plurality of products of different types to be produced simultaneously in parallel on a plurality of molding lines, and In a production system configured such that raw materials are selectively supplied to the molding machines installed in each molding line from a plurality of raw material supply devices, when creating a production process plan for a unit period, each raw material supply a storage unit that stores the maximum supply capacity of the device as a possible supply amount of raw materials corresponding to each raw material supply device; and a storage unit that allocates each product to one of the plurality of molding machines according to a predetermined priority of production requests. The process allocation processing unit calculates the usage amount of each raw material of the product assigned to each molding machine during a certain period of time, and calculates the maximum usage amount of each raw material used in the determined period of time. The actual usage amount calculating section calculates the actual usage amount of each raw material for each molding machine, and the actual usage amount of each raw material calculated by this actual usage amount calculation section is totaled for all molding machines, and the raw material for a certain period of time is calculated. A total usage amount calculation unit that calculates the total usage amount for each raw material, and a comparison between the total usage amount for each raw material calculated by the total usage amount calculation unit and the possible supply amount for each raw material stored in the storage unit, When the total amount of any raw material used exceeds the possible supply amount, the allocation position of any product is changed according to the priority of production requests so that the total amount of any raw material used does not exceed the possible supply amount. The configuration includes an allocation change processing unit that avoids constraints.

[0009]

[Operation] When creating a production process plan for a unit period such as one week or one month, the storage unit stores the maximum supply capacity of each of multiple raw material supply devices for the raw material corresponding to each raw material supply device. It is stored in advance as a possible supply amount.

The process allocation processing section sequentially allocates each product to one of a plurality of molding machines in accordance with predetermined priorities of production requests.

[0011] Here, as an example of determining the priority order of production requests, for example, various products for which production is requested are classified based on standard data classified according to the similarity of seasonal sales trends, and the classified product groups are This is done by determining the allocation order (1, 2, 3, etc.). The allocation order (1, 2, 3...) is the order of highest production requirements, and the product group with order (hereinafter referred to as priority) 1 is the product that is needed immediately. The product group with priority 2 indicates a product group that is required immediately after the product group with priority 1 is manufactured. Further, a product group assigned a priority level n indicates a product group that is required immediately after the product group assigned a priority level n-1 is manufactured.

[0012] In the actual usage amount calculation section, the process allocation processing section performs the above-mentioned process to calculate the amount of each The usage amount of each raw material of the product assigned to the molding machine is determined, and the maximum usage amount of the determined usage amount of each raw material is determined as the actual usage amount of each raw material of each molding machine during that certain period.

For example, between the start of work and the end of work, product A and product E are allocated, and the usage amount of one raw material 1 of product A is 400 kg/h, and the usage amount of one raw material 1 of product E is 400 kg/h. If the usage amount is 450Kg/h, the maximum usage amount of 450Kg/h is used as raw material 1 for that certain period.
Actual usage amount.

[0014] The total usage amount calculation unit calculates the total usage amount of each raw material in a certain period by summing up the actual usage amount of each raw material determined by the actual usage amount calculation unit for all molding machines.

For example, the usage amount of one raw material 1 for product E in molding machine 1 is 450 kg/h, the usage amount of one raw material 1 for product B in molding machine 2 is 100 kg/h, and the usage amount of one raw material 1 for product B in molding machine 3 is 450 kg/h. The usage amount of one raw material 1 is 300Kg.
/h, the total usage amount of raw material 1 is 850 (=450
+100+300)Kg/h.

[0016] The allocation change processing unit compares the total usage amount for each raw material determined by the total usage amount calculation unit with the possible supply amount for each raw material stored in the recording unit. and,
Based on the comparison results, for example, the total usage amount of raw material 1 is 85
When 0Kg/h exceeds the possible supply amount (for example, 800Kg/h), the allocation position of any product (in this case, the last allocated product E) is changed according to the priority of the production request, and the raw material 1 Constraint avoidance processing is performed so that the total usage amount does not exceed the possible supply amount.

[0017] For example, from the fixed period from the start of work to the end of work, from 5:00 p.m., which is the end of work, to 1:00 a.m. the next day.
Change the allocation position in the next fixed period up to 0. As a result, the total amount of raw material 1 used during a certain period from the start of work to the end of work is 400 (=850-450) Kg/h
becomes.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing the electrical configuration of a production process planning chart creation device according to the present invention.

In the figure, the production process plan creation device of the present invention is roughly divided into a personal computer 10 for screen operation and a workstation 20 for automatically planning the production process.
0 and the workstation 20 are connected via a LAN (LOCAL Area Network) via a repeater (not shown).
) is connected.

[0021] That is, a unit period (for example, one week, etc.)
The output of a production plan data input section (hereinafter simply referred to as the input section) 11 that inputs production plan data for a hit is led to a main control section 12 that controls the operation of each section of the personal computer 10. The unit 12 and the first storage unit 13 and second storage unit 14, which are external databases, are each bidirectionally connected.

[0022] The first storage unit 13 stores calendar data in which each item of the date, day of the week, working time zone, and number of the molding machine installed in each molding line is assigned for each unit period. .

FIG. 2 shows an example of calendar data per unit period stored in the first storage section 13. In the figure, the first shift is the work period from 9:00 a.m. to 5:00 p.m. in this example, and the second shift is the work period from 5:00 p.m. to 1:00 a.m. the next day. A third shift is a working time period from 1:00 a.m. to 9:00 a.m. on the same day. Furthermore, this embodiment shows a case where three molding machines 1 to 3 are in operation.

Further, the second storage section 14 stores data indicating the supply capacity of each raw material 1 to 5 contained in each raw material supply device (not shown).

FIG. 3 shows an example of raw material supply capacity data stored in the second storage section 14. In this example,
Five types of raw materials shall be mixed and used as appropriate, and the supply capacity of raw material 1 is 800 kg/h, the supply capacity of raw material 2 is 500 kg/h, and the supply capacity of raw material 3 is 40 kg/h.
0Kg/h, the supply capacity of raw material 4 is 200Kg/h,
The supply capacity of raw material 5 is 500 kg/h.

Further, the output of the process correction section 15 that corrects the production process plan created by this device is led to the main control section 12, which is equipped with a CRT or the like to display the created production process plan. The display section 16 and the main control section 12 are bidirectionally connected.

The main control section 12 is adapted to correct necessary portions of the production process plan displayed on the display section 16 based on correction instructions from the process correction section 15. Further, the output of the main control unit 12, which sends data indicating the production process plan displayed on the display unit 16, is led to a printer 17, so that the production process plan is printed out by the printer 17. It has become.

Furthermore, the main control section 12 and the control section 21, which is a component of the workstation 20, are bidirectionally connected by a communication line 31.

The control section 21 controls the operation of each section of the workstation 20, and the control section 21, the process allocation processing section 22, the usage amount calculation section 23, and the allocation change processing section 25 are mutually connected to each other. It is a tropic connection. Further, the control unit 21 is bidirectionally connected to a third storage unit 26 and a fourth storage unit 27, which are external databases.

[0030] In the third storage section 26, each item of date, day of the week, and working time zone is allocated for each unit period, and in the area of each working time zone, the type of each raw material is shown on the vertical axis. Calendar data is stored in which items indicating the type and total of each molding machine are assigned to the horizontal axis.

FIG. 4 shows an example of calendar data per unit period stored in the third storage section 26. In this example, five types of raw materials 1 to 1 are added to each work time zone.
5 and three types of molding machines 1 to 3 are allocated.

The process allocation processing unit 22 allocates the production plan data per unit period input from the input unit 11 to the calendar data per unit period read from the first storage unit 13.

[0033] The usage amount calculation unit 23 is the process allocation processing unit 22.
Products A to 3 assigned to each molding machine 1 to 3 during a certain work period (for example, the first shift on April 8th) assigned in
In addition to determining the usage amount of each raw material in E, the maximum usage amount among the usage amounts for each raw material determined is determined as the actual usage amount of each raw material for each molding machine during that working time period, and this is
The calendar data read from the storage unit 26 is filled in at the corresponding location.

[0034] In addition, the usage amount calculation unit 23 calculates the total usage amount of each raw material in the working time period by summing the actual usage amount of each raw material determined in this way for all molding machines 1 to 3. , enter this in the corresponding location of the same calendar data.

[0035] The allocation change processing unit 25 includes the usage amount calculation unit 23
The total amount used for each raw material and the second storage section 14 determined by
A comparison is made with the possible supply amount of each raw material stored in the . Based on the comparison results, if the total usage of any raw material exceeds the possible supply amount, the total usage of any raw material can be reduced by changing the allocation position of any product according to the priority of production requests. Constraint avoidance processing is performed to prevent the amount of supply from exceeding the possible supply amount.

Calendar data showing the production process planning table for which the avoidance process has been performed in this way (that is, the calendar data shown in FIG. The calendar data shown in FIG.
It is designed to be stored in the storage section 27 of.

Calendar data indicating this production process planning table is displayed on the display section 28 via the control section 21, and is also sent to the display section 1 via the communication line 31 and the main control section 12.
It is displayed on the screen of 6.

[0038] Note that the input section 11 and process correction section 1 described above
5 is composed of a keyboard and a mouse equipped with a numeric keypad and the like.

Next, the operation of the production process plan creation apparatus having the above configuration will be explained.

[0040] In creating a production process planning sheet, an operator first operates the input unit 11 to input production planning data for a unit period (for example, one week).

[0041] This production plan data includes production request data such as which products, how many pieces, and by what time;
It is created based on basic data such as the manufacturing time for each product and the setup change time for the molds of each forming machine 1 to 3 in each molding line. Furthermore, the production request data is classified according to certain criteria, and the production allocation order for each classification is determined.

[0042] Here, classification based on a certain standard means, for example, classification based on the similarity of the purpose of use of products (for example,
Products used in the kitchen, products used for sports, etc. ) Classification based on the similarity of seasonal sales trends (for example, product groups that sell well in early spring, product groups that sell well in early summer, etc.). Also, production allocation order 1, 2, 3,
... means the order of highest production requirements, order 1:
I want it right away.

Order 2: I want it immediately after order 1.

Order 3: I want it immediately after order 2.

: :Order n: I want it immediately after order n-1. This is what it means.

The production plan data classified and created based on such criteria is input to the process allocation processing section 22 via the main control section 12, the communication line 31, and the control section 21. Here, the production order of the created production plan data is assumed to be product A, product B, product C, product D, product E, product F, and so on.

The process allocation processing section 22 allocates the derived production plan data per unit period to the calendar data per unit period read from the first storage section 13, which is an external database. Allocation to calendar data is performed for each work time period (that is, for each shift).

In addition, the usage amount calculation unit 23 calculates the usage amount of each raw material of the product allocated to each molding machine 1 to 3 each time one process (product) is allocated in the process allocation processing unit 22, and The maximum usage amount among the determined usage amounts for each raw material is determined as the actual usage amount for each raw material in each molding machine during that working time period, and this is determined at the corresponding location in the calendar data read out from the third storage section 26. Fill in. In addition, by summing the actual usage amount of each raw material determined in this way for all molding machines 1 to 3, the total usage amount of each raw material in that working time period is determined, and this is added to the corresponding part of the same calendar data. Processes such as filling in the information are performed.

[0049] Also, in the allocation change processing unit 25, each time one process (product) is allocated in the process allocation processing unit 22, the total usage amount entered in the total column of the calendar data and the total amount used in the second storage unit 14 are calculated. A comparison is made with the stored possible supply amount for each raw material, and constraint avoidance processing is performed when necessary.

Hereinafter, the operations of the process allocation processing section 22, the usage amount calculation section 23, and the allocation change processing section 25 will be sequentially referred to with reference to the allocation state to the calendar data of a certain day shown in FIGS. 5 to 10. I will explain. However, Figures 5 to 1
The calendar data shown at 0 indicates the first shift on April 8th.

That is, the process allocation processing section 22 allocates the first product A in the production plan data to the molding machine 1.

At this time, the usage amount calculation unit 23 calculates that the product A
The usage amount of each raw material is determined, and the maximum usage amount of the usage amount of each raw material thus determined is determined as the actual usage amount of each raw material of each molding machine in one shift, and this is stored in the third storage section 26.
Fill in the corresponding part of the calendar data read from . In this case, the actual usage amount 400Kg/h, 50Kg/h,
100Kg/h, 0Kg/h, and 0Kg/h will be entered sequentially.

[0053] Furthermore, the actual usage amount of each raw material determined in this manner is totaled for all molding machines 1 to 3 to calculate the total usage amount of each raw material. In this case, since there is only product A, the vertical column indicated by numeral 44 contains the molding machine 1 indicated by numeral 41.
Same as the vertical column, 400Kg/h, 50Kg/h,
100Kg/h, 0Kg/h, and 0Kg/h will be entered sequentially.

The allocation change processing section 25 compares the total usage amount entered in the total column indicated by reference numeral 44 with the possible supply amount for each raw material stored in the second storage section 14. In this case, the possible supply amount of each raw material stored in the second storage section 14 is 800 kg/h for raw material 1 and 500 kg/h for raw material 2.
h, raw material 3 is 400Kg/h, raw material 4 is 200Kg/h
/h, raw material 5 is 500 kg/h, and the total amount used for each raw material entered in the total column shown by code 44 is:
In this case, the constraint avoidance process is not performed because all of the amounts are below the possible supply amount of the corresponding raw materials.

Next, the process allocation processing section 22 allocates the next product B in the production plan data to the molding machine 2.

At this time, the usage amount calculation unit 23 calculates that the product B
The usage amount of each raw material is determined, and the maximum usage amount of the usage amount of each raw material thus determined is determined as the actual usage amount of each raw material of each molding machine in one shift, and this is stored in the third storage section 26.
Fill in the corresponding part of the calendar data read from . In this case, the actual usage amounts are 100 kg/h, 0 kg/h, 2
00Kg/h, 0Kg/h, and 0Kg/h will be entered sequentially.

Further, the actual usage amount of each raw material determined in this manner is totaled for all molding machines 1 to 3 to calculate the total usage amount of each raw material. In this case, since there are product A and product B, the total column indicated by code 44 has 500 (=4) from the top.
00+100)Kg/h, 50Kg/h, 300(=1
00+200) Kg/h, 0 Kg/h, and 0 Kg/h are entered in sequence, and the previously entered values are cleared.

The allocation change processing section 25 compares the total usage amount entered in the total column indicated by the reference numeral 44 with the possible supply amount for each raw material stored in the second storage section 14. In this case, since the total usage amount of each raw material entered in the total column indicated by reference numeral 44 is lower than the possible supply amount of each raw material stored in the second storage section 14, in this case, ,
Constraint avoidance processing is not performed.

Next, the process allocation processing unit 22 allocates the next product C in the production plan data to the molding machine 3.

At this time, the usage amount calculation unit 23 calculates the amount of product C.
The usage amount of each raw material is determined, and the maximum usage amount of the usage amount of each raw material thus determined is determined as the actual usage amount of each raw material of each molding machine in one shift, and this is stored in the third storage section 26.
Fill in the corresponding part of the calendar data read from . In this case, the actual usage amounts are 100Kg/h, 0Kg/h, 0Kg/h, 0Kg/h, 0Kg/h, 0Kg/h,
Kg/h, 50Kg/h, and 300Kg/h will be entered sequentially.

[0061] Furthermore, the actual usage amount of each raw material determined in this manner is totaled for all molding machines 1 to 3 to calculate the total usage amount of each raw material. In this case, since they are product A, product B, and product C, the total column indicated by code 44 contains 600 from the top.
(=400+100+100)Kg/h, 50Kg/h
, 300 (=100+200)Kg/h, 50Kg/h
, 300Kg/h will be entered one after another, and the previously entered value will be cleared.

The allocation change processing section 25 compares the total usage amount entered in the total column indicated by reference numeral 44 with the possible supply amount for each raw material stored in the second storage section 14. In this case, since the total usage amount of each raw material entered in the total column indicated by reference numeral 44 is lower than the possible supply amount of each raw material stored in the second storage section 14, in this case, ,
Constraint avoidance processing is not performed.

Next, the process allocation processing unit 22 allocates the next product D in the production plan data to the molding machine 3 again (see FIG. 6).

At this time, the usage amount calculation unit 23 calculates that the product D
The usage amount of each raw material is determined, and the maximum usage amount of the usage amount of each raw material thus determined is determined as the actual usage amount of each raw material of each molding machine in one shift, and this is stored in the third storage section 26.
Fill in the corresponding part of the calendar data read from . In this case, the actual usage amounts are 300 (because 300 > 100) Kg/h and 80 (because 80 > 0) Kg/h from the top in the vertical column of the molding machine 3 indicated by reference numeral 43 in FIG. ,
0 (because 0=0) Kg/h, 100 (100>5
0) Kg/h, 300 (because 300>0) Kg/h are entered in sequence, and the previously entered numerical value is cleared.

[0065] Furthermore, the actual usage amount of each raw material determined in this manner is totaled for all molding machines 1 to 3 to calculate the total usage amount of each raw material. In this case, product A, product B, product C and product D, and for product C and product D, their M
Since AX is selected, 800 (=400 + 100 + 300) Kg from the top is shown in the total column indicated by code 44 in Figure 6.
/h, 130 (=50+80)Kg/h, 300 (=1
00+200) Kg/h, 100Kg/h, 300Kg
/h will be entered one after another, and the previously entered numerical value will be cleared.

The allocation change processing section 25 compares the total usage amount entered in the total column indicated by reference numeral 44 with the possible supply amount for each raw material stored in the second storage section 14. In this case, since the total usage amount of each raw material entered in the total column indicated by reference numeral 44 is lower than the possible supply amount of each raw material stored in the second storage section 14, in this case, ,
Constraint avoidance processing is not performed.

Next, the process allocation processing unit 22 allocates the next product E in the production plan data to the molding machine 1 (see FIG. 7).
.

At this time, the usage amount calculation unit 23 calculates that the product E
The usage amount of each raw material is determined, and the maximum usage amount of the usage amount of each raw material thus determined is determined as the actual usage amount of each raw material of each molding machine in one shift, and this is stored in the third storage section 26.
Fill in the corresponding part of the calendar data read from . In this case, the actual usage amounts are 450 (because 450>400) Kg/h and 100 (because 100>50) Kg/h from the top in the vertical column of the molding machine 1 shown by the reference numeral 41 in FIG.
/h, 100 (because 100>0) Kg/h, 0 (
Since 0=0) Kg/h and 50 (because 50>0) Kg/h are entered in sequence, and the previously entered numerical value is cleared.

Further, the actual usage amount of each raw material determined in this manner is totaled for all molding machines 1 to 3 to calculate the total usage amount of each raw material. In this case, product A: product B, product C product D, product E, and the MAX is selected for product C and product D, and product A and product E, so the numbers shown in FIG. 8 from the top in the total column indicated by 44
50(=450+100+300)Kg/h, 180(
=100+80)Kg/h, 300(=100+200
)Kg/h, 100Kg/h, 350 (50+300)
Kg/h will be entered sequentially, and the previously entered value will be cleared.

The allocation change processing unit 25 compares the total usage amount entered in the total column indicated by reference numeral 44 with the possible supply amount for each raw material stored in the second storage unit 14. In this case, the total usage amount (850Kg/h) of raw material 1 is equal to the possible supply amount (800Kg/h) of raw material 1 stored in the second storage section 14.
g/h), in this case, one of the following three patterns of constraint avoidance processing is selected and performed.

That is, in the first pattern 1, as shown in FIG. 8, the allocation position of the last allocated product E is 4.
Changed to molding machine 1 with two shifts on the 8th of each month. Thereafter, the process allocation processing section 22 allocates the next product F in the production plan data to the molding machine 1 again (see FIG. 9).

At this time, the usage amount calculation unit 23 calculates that the product F
The usage amount of each raw material is determined, and the maximum usage amount of the usage amount of each raw material thus determined is determined as the actual usage amount of each raw material of each molding machine in one shift, and this is stored in the third storage section 26.
Fill in the corresponding part of the calendar data read from . In this case, the actual usage amounts are 400 (because 400 > 300) Kg/h and 80 (because 80 > 50) Kg/h from the top in the vertical column of the molding machine 1 shown by reference numeral 41 in FIG.
, 100 (because 100=100) Kg/h, 0(
Since 0=0) Kg/h and 30 (because 30>0) Kg/h are entered sequentially, and the previously entered numerical value is cleared.

[0073] Furthermore, the actual usage amount of each raw material determined in this manner is totaled for all molding machines 1 to 3 to calculate the total usage amount of each raw material. In this case, there are product A, product B, product, C product D, and product F, and the MAX is selected for product C and product D, and product A and product F, so the numbers are shown in FIG. 8 from the top in the total column indicated by 44
00(=400+100+300)Kg/h, 160(
=80+80)Kg/h, 300(=100+200)
Kg/h, 100Kg/h, 330 (30+300)K
g/h will be entered in sequence, and the previously entered value will be cleared.

The allocation change processing unit 25 compares the total usage amount entered in the total column indicated by the reference numeral 44 with the possible supply amount for each raw material stored in the second storage unit 14. In this case, the total usage amount of each raw material entered in the total column indicated by reference numeral 44 is lower than the possible supply amount of each raw material stored in the second storage section 14, and the restriction is avoided. Therefore, at this point, the first shift assignment for April 8th will end.

Note that when allocating product F, the total usage amount of any raw material entered in the total column indicated by reference numeral 44 in FIG. 9 is the possible supply amount of any raw material stored in the second storage section 14. If the number exceeds , the product F is assigned to the molding machine 2 with two shifts, the next product G (not shown) is assigned to the molding machine 1 with one shift, and the same processing as above is performed.

[0076] Also, the second pattern 2 of constraint avoidance processing
increases the production amount of product A to the broken line, as shown in FIG. In this case, if the increase is subtracted from unallocated products A of the same type, it will not lead to an increase in the production of product A as a whole.

[0077] Also, the third pattern 3 of constraint avoidance processing
The above-mentioned pattern 1 and pattern 2 are prioritized in advance, and when constraint avoidance becomes necessary, constraint avoidance processing is performed according to the priority order.

For example, if the priority order is pattern 1 and pattern 2, even though product E is changed to product F according to pattern 1 above, the total usage amount of any raw material exceeds the possible supply amount. At that point, cancel the operation of pattern 1 and return to the original state, and then repeat pattern 2.
What is necessary is to shift to the operation of .

A production process schedule table for all molding lines is created by sequentially allocating production plan data per unit period to calendar data while performing such constraint avoidance processing as necessary. Then, the production process plan sheet in which all the processes have been assigned is stored in the fourth storage section 27 and displayed on the display section 16 via the control section 21 and the control section 12.

Thereafter, while looking at the production process plan displayed on the display unit 16, if the operator determines that it is necessary, insert, delete, or
Make corrections such as movement.

The final production process schedule revised in this manner is printed out by the printer 17 and handed to each manufacturing worker as a manufacturing work instruction sheet.

[0082] In the above embodiment, a fixed period is explained as a unit of shift, but by shortening this period (for example, in units of 4 hours, units of 2 hours, etc.), it is possible to This eliminates the problem of performing avoidance processing to avoid problems, and makes it possible to create a more detailed and efficient production process plan.

[0083]

Effects of the Invention: The production process plan creation device of the present invention prioritizes production requests when the total amount of any raw material used exceeds the possible supply amount when creating a process plan per unit period. By changing the allocation position of any product according to the order, the configuration avoids constraints so that the total amount of any raw material used does not exceed the possible supply amount, so it is almost impossible for production systems with multiple molding lines. It is possible to realize a production process plan creation device that is applicable to all cases. In addition, this production process plan creation device can significantly reduce the time required for process planning per unit period, and has the effect of making it possible to create detailed process plan data with high production efficiency. .

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the electrical configuration of a production process planning chart creation device of the present invention.

FIG. 2 is a diagram showing an example of calendar data stored in a first storage unit.

FIG. 3 is a diagram showing an example of raw material supply capacity data stored in a second storage unit.

FIG. 4 is a diagram illustrating an example of calendar data per unit period stored in a third storage unit 26;

FIG. 5 is a diagram showing an example of an allocation state to calendar data for a certain day.

FIG. 6 is a diagram showing an example of an allocation state to calendar data for a certain day.

FIG. 7 is a diagram showing an example of an allocation state to calendar data for a certain day.

FIG. 8 is a diagram showing an example of an allocation state to calendar data for a certain day.

FIG. 9 is a diagram showing an example of an allocation state to calendar data for a certain day.

FIG. 10 is a diagram showing an example of an allocation state to calendar data for a certain day.

[Explanation of symbols]

10 Personal computer 11 Input section 12 Main control section 13 First storage section 15 Process correction section 14 Second storage section 16 Display section 17 Printer 20 Workstation 21 Control section 22 Process allocation processing section 23 Usage amount calculation section (actual use amount calculation unit, total usage calculation unit) 25 Allocation change processing unit (including comparison unit) 26 Third storage unit 27 Fourth storage unit 28 Display unit

Claims (1)

[Claims] Claim 1: A plurality of products of different types are simultaneously produced in a plurality of molding lines in parallel, and raw materials are selectively supplied to the molding machines installed in each molding line from a plurality of raw material supply devices. In a production system configured to supply raw materials, when creating a production process plan for a unit period, a memory that stores the maximum supply capacity of each raw material supply device as the possible supply amount of raw materials corresponding to each raw material supply device. a process allocation processing section that allocates each product to one of the plurality of molding machines according to a predetermined priority order of production requests; An actual usage amount calculation unit that calculates the usage amount of each raw material and calculates the maximum usage amount of the usage amount of each raw material determined as the actual usage amount of each raw material in each molding machine during that certain period, and this actual usage amount. The total usage amount calculation unit calculates the total usage amount of each raw material in a certain period by summing the actual usage amount of each raw material calculated by the amount calculation unit for all molding machines, and the total usage amount calculation unit The total usage amount of each raw material is compared with the possible supply amount of each raw material stored in the storage unit, and if the total usage amount of any raw material exceeds the possible supply amount, the priority of the production request is determined. and an allocation change processing unit that avoids constraints so that the total usage amount of any raw material does not exceed the available supply amount by changing the allocation position of any product according to the production process plan sheet. Creation device.