JP2810841B2 - Creating a production plan for the molding process - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of preparing a production plan of a molding process for automatically generating an optimum schedule in consideration of resin switching, die switching, and the like in the molding process.

[0002]

2. Description of the Related Art Japanese Patent Laid-Open No. Hei 4-233072 is known as a technique for automatically generating a molding process schedule. In this conventional example, an order that can be produced with the same mold is selected for the last order already scheduled, and when there are a plurality of orders, the order with a small difference in color shading from the color of the last order is preferentially assigned to the equipment. ing. If there is no order that can be produced with the same mold, the order that can be started as soon as the final order is selected and assigned.

[0003]

In the above-mentioned conventional example, in the case of different colors (same mold), only the relationship between the final order of the existing schedule and the next order to be assigned is considered, so that the total Considering this, it cannot be said that the switching time is reduced. Also, in the type exchange, the switching time between the final order and the next order to be assigned is similarly taken into consideration, so that the switching time cannot be said to be reduced.

[0004] The present invention has been made in view of the above-mentioned problems of the conventional example. The purpose of the present invention is to determine the order from the relationship between the last order of the existing schedule and the next order when assigning the order. Instead, it is an object of the present invention to provide a method of creating a production plan of a molding process, in which the next order is determined in a state where the order in the candidate orders is also determined, and the total switching time is minimized.

[0005]

SUMMARY OF THE INVENTION In order to solve the problems of the prior art and achieve the object of the present invention, a method for producing a production plan of a molding process according to the present invention comprises the steps of: A lot-based order is preferentially assigned to a scheduled facility with the same mold as the mold used for the generated lot-based order for each process, and when there are a plurality of these provisionally assigned orders, From the colors of the final order used in the scheduled equipment and the colors of these provisionally assigned orders,
Of the color determined by the color of the order assigned before
When all the multiple orders, which are the sum of the switching times, are assigned, the order of the candidates is rearranged so that the total switching time of the necessary colors is minimized, and the process of assigning to the equipment is performed.
If there is no order that can be produced with the same mold, the next order is selected from the ordering orders and assigned.

Further, in the method of scheduling a molding process, a lot-unit order is preferentially assigned to a scheduled facility in which the same mold as the mold used in the lot-unit order for each process generated from the ordering order is attached. Temporary assignment,
Any of the color groups in which the final order color used in the equipment scheduled when there are a plurality of these provisionally assigned orders and the color of these provisionally assigned orders are classified into a plurality of shades according to their shades, respectively. All the color groups to which these multiple orders belong are sorted out from the multiple color groups that rank the colors of the final order used by the equipment already scheduled and the colors of these provisionally assigned orders. Rearrange the order of the candidate color group so that the total switching time required when assigning is minimized,
It is preferable to perform a process of allocating to equipment and, on the other hand, if there is no order that can be produced with the same mold, select the next order from the ordering order and allocate it.

[0007] In addition, when an order in lot units for each process generated from an order cannot be produced using the same mold as the mold of the equipment that has been scheduled, the molding material that has been molded in the molding equipment before switching is taken into account. In this case, the order to replace the mold is temporarily assigned to the equipment, and when there are a plurality of orders to replace the mold, the mold of the final order used in the equipment that has been scheduled and the mold of the temporarily assigned mold to be replaced are used. ,
It is also preferable to select the order with the shortest switching time to the final order and assign it to the equipment. Furthermore, if the lot order for each process generated from the order cannot be produced with the same mold as the mold of the equipment that has been scheduled, the molding material that has been molded in the molding equipment before the change is considered. The order to be replaced is temporarily assigned to the equipment, and when there are a plurality of orders for which the mold is to be exchanged, the plurality of molds are determined from the mold of the final order used in the equipment which has been scheduled and the mold of the temporarily assigned mold to be replaced. It is also preferable to perform a process of rearranging the candidate orders so that the total switching time required when all the orders are allocated is minimized, and assigning the highest priority order to the equipment.

In the case where the order includes a plurality of processes, when it is considered that the task time of each process is the same, a process of selecting the order with the shortest process switching time with the final order and assigning it to the equipment may be performed. preferable. Also, when it is considered that the task time of each process is the same when there are multiple orders, and when there are multiple candidate orders, these multiple orders are determined from the final scheduled order and these temporarily assigned orders. It is also preferable that the candidate orders are rearranged so that the total process switching time required when all the orders are assigned is minimized, and the highest priority order is assigned to the equipment.

[0009]

[Action] Thus, according to the present invention the method as described above, if there is a different color several orders of using molds of the same mold equipment was already scheduled, split put order
Color and the color of the order assigned before it.
When all the orders, which are the sum of the color switching times, are all assigned, the candidate orders are rearranged so that the required total color switching time is minimized, and the process of assigning to the equipment is performed. The switching time can be minimized.

In the case where there are many types of colors to be used, the color of the final order used in the equipment that has been scheduled and the colors of these provisionally assigned orders are classified into a plurality of colors by shading. Of these color groups, classification is performed to determine which color group belongs to, and from the multiple color groups in which the colors of the final order used in the equipment that has been scheduled and the colors of these provisionally assigned orders are classified, these multiple orders are By rearranging the order of candidate color groups and allocating them to equipment so that the total switching time required when all the belonging color groups are allocated is minimized, there are many types of colors used. Also, the total switching time can be minimized.

In the case where the lot order for each process generated from the order cannot be produced by the same mold as the mold of the equipment which has been scheduled, the molding material which has been molded by the molding equipment before switching is taken into account. In this case, the order to replace the mold is temporarily assigned to the equipment, and when there are a plurality of orders to replace the mold, the mold of the final order used in the equipment that has been scheduled and the mold of the temporarily assigned mold to be replaced are used. ,
Select the order with the shortest switching time to the final order and assign it to the equipment, or, in consideration of the molding material that was molded in the molding equipment before switching, temporarily assign the order to replace the mold to the equipment, When there are a plurality of the mold exchange orders, from the molds of the final order used in the equipment already scheduled and the molds of these temporarily assigned mold exchange orders,
By switching the candidate orders so that the total switching time required when all of these multiple orders are allotted is minimized, and assigning the highest priority order to the equipment, total switching including type change is performed. The time can be minimized.

In the case where the order includes a plurality of processes, when it is considered that the task time of each process is the same, a process of selecting the order with the shortest process switching time with the final order and assigning it to the equipment is performed. Alternatively, when the order has a plurality of processes, and when the task time of each process is considered to be the same, when there are a plurality of candidate orders, these multiple orders are determined from the already scheduled final order and these provisionally assigned orders. By rearranging the candidate orders so that the total process switching time required when all the processes are allocated is the shortest, and assigning the highest priority order to the equipment, even if the order is multiple processes, all of the multiple processes are included The total switching time can be minimized.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail based on embodiments.
FIG. 2 is a block diagram showing the principle of the present invention. 1 is a processing device for processing a schedule of a molding process. 2 is a terminal, which is used for key input of an order from a customer or molding on a display. The process schedule is displayed.

FIG. 1 is a flow chart showing the overall configuration operation of the first embodiment of the present invention. When an order is input, the processing apparatus 1 first checks the last order of the already scheduled schedule. Then, it is checked whether or not there is an order to be produced in the same mold as the final order of the already-scheduled order among the orders to be assigned. If there is an order to be produced with the same mold as the final order of the already scheduled schedule, all the orders are listed as candidates. Next, the total switching time required when all of these multiple orders are assigned is minimized based on the colors of the final order already scheduled and the colors of all the candidate orders listed above as candidates for production with the same mold. The order of the candidates is rearranged so that the order of assignment is determined, and processing for allocating the equipment is performed. On the other hand, if there is no order to produce with the same mold as the final order already scheduled, the mold needs to be replaced.
All will be given as candidates. Next, the next order is selected from the candidates, and the newly selected order is returned to the beginning again to check whether there is an order of a different color.

Here, as a specific example, when an order is input, and there is an order to be produced with the same mold as the final order of the scheduled schedule, the color of the final order of the scheduled schedule is set to "red". A case will be described in which three order orders “white”, “brown”, and “black” are input as orders of the same mold. In the processing device 1, data of exchange times of various colors are stored in advance. Based on this data, in the case of the above four types of colors, the color exchange times for all combinations of the four types of colors are as shown in Table 1. Therefore, from the data shown in the color exchange time table of Table 1, the candidate color order is determined from the exchange times of “red”, “white”, “brown”, and “black” (in this case, , Consider all combinations of patterns). As is apparent from Table 1, when the colors are arranged in the order of “red” → “white” → “brown” → “black”, the total switching time is 30 minutes (red → white) +10 minutes (white → brown) +10 Minutes (brown → black) = 50 minutes, and the minimum switching time is shorter than any other combination, so the order of assigning candidate orders is “red” → “white” →
It decides from "tea" to "black" and performs the process of assigning it to the equipment.

[0016]

[Table 1]

Next, FIG. 4 is a flowchart showing the entire configuration operation of the invention according to claim 2 of the present invention. When an order is input, the processing apparatus 1 first checks the last order of the already scheduled schedule. Then, it is checked whether or not there is an order to be produced in the same mold as the final order of the already-scheduled order among the orders to be assigned. If there is an order to be produced with the same mold as the final order of the already scheduled schedule, all the orders are listed as candidates. Here, it is determined which color group belongs to the plurality of color groups in which the colors of the final order used in the equipment which has been scheduled next and the colors of the temporarily allocated orders belong to the respective ranks. Here, the processing device 1 previously stores a large number of colors into a plurality of ranks based on dark and light colors, and stores the rank-divided data. For example, as shown in FIG. 3, when there are “white”, “milk”, “ash”, “red”, “brown”, and “black”, the color changes from light to dark to “white” → “milk” → “ash” →
The shade is different from “red” → “brown” → “black”. Therefore, as shown in Table 2, the ranks of the color groups are determined based on the light and shade colors, and the data obtained by dividing the ranks is stored in the processing device 1 in advance. As an example of Table 2, the color group to which "white" and "milk" belong is rank L1, and "gray" and "red"
The color group to which "fine silver" belongs is rank L2, the color group to which "brown" and "new tea" belong is rank L3,
The color group to which "black" and "fine black" belong is rank L4.
It is. After deciding which color group belongs to the color group of the final order used in the equipment that has already been scheduled and the color groups of these provisionally assigned orders, as described above, The switching time is calculated from the rank of the order color and the ranked order candidate group. Then, the allocation order of the rank groups is determined so that the total switching time required when all of the candidate order groups ranked as described above are allocated to the final order of the already scheduled schedule is minimized (that is, The order of assigning the order of the candidate color group is determined so that the total switching time required when all the color groups to which a plurality of orders belong is minimized), and the rank groups are sequentially assigned to the equipment. It is. By doing so, the total switching time can be minimized even if there are many types of colors used. On the other hand, if there is no order to produce with the same mold as the final order already scheduled, the mold needs to be replaced.
All will be given as candidates. Next, the next order is selected from the candidates, and the newly selected order is returned to the beginning again to check whether there is an order of a different color.

Here, to describe a specific example, when an order is input, and there is an order to be produced with the same mold as the final order of the scheduled schedule, the color of the final order of the scheduled schedule is set to "red". A case will be described in which three order orders “white”, “brown”, and “black” are input as orders of the same mold. The processing device 1 previously stores a large number of colors into a plurality of ranks based on dark and light colors, and stores the rank-divided data. Therefore,
When three order orders of “white”, “brown”, and “black” are input as orders of the same mold, it is determined to which rank “red”, which is the color of the last order of the scheduled schedule, belongs.
Further, it is determined to which rank the three ordering orders “white”, “brown”, and “black” belong. As a result, "red" becomes L
2, "white" is L1, "brown" is L3, and "black" is L4, and L2, L1, L3,
The order of the candidate rank is determined from the switching time of L4 (in this case, the patterns of all combinations are considered).
As is apparent from Table 3, the color order is L2 → L1 → L
3 → L4, total switching time is 30 minutes (L2 →
L1) +10 minutes (L1 → L3) +10 minutes (L3 → L4)
= 50 minutes, and the minimum switching time is shorter than any other combination. Therefore, the order of candidate orders is changed from L2 → L1 → L3 → L4 as described above, that is, “red” → “white” →
It decides from "tea" to "black" and performs the process of assigning it to the equipment.

[0019]

[Table 2]

[0020]

[Table 3]

Next, FIG. 5 is a flow chart showing the entire configuration operation of the invention according to claim 3 of the present invention. When an order is input, the processing apparatus 1 first checks the last order of the already scheduled schedule. Then, it is checked whether or not there is an order to be produced in the same mold as the final order of the already-scheduled order among the orders to be assigned. If there is an order to be produced with the same mold as the final order of the already-scheduled product, the order is assigned in the same manner as in the above-described embodiment of the first and second embodiments. On the other hand, if there is no order to produce with the same mold as the final order of the already scheduled schedule, the mold is exchanged. In this case, all the orders are given as candidates. Next, in consideration of the molding material before switching, the switching time is calculated from the mold of the final order and the mold of the candidate order used in the equipment that has been scheduled. Next, when a candidate order is assigned to the last order in the already-scheduled order, the order in which the switching time to the last order is the shortest is selected. Next, in this way, the order in which the switching time to the final order is the shortest is selected, and the above-described process of allocating to the equipment is performed. Then, for the newly selected order, the procedure returns to the beginning again to check whether there is an order of a different color.

Here, a concrete example will be described. In the case where an order is input and there is an order to be produced with the same die as the final order of the already-scheduled process, processing is performed as in the first and second embodiments. Is done. On the other hand, if there is no order that can be produced with the same mold as the final order already scheduled, an order with a different mold is selected as a candidate.
For example, the mold of the last order on the already scheduled schedule is designated as mold B (red), and mold C (white,
Black, brown), D mold (white, black, brown), A mold (white, black,
The case where there is a mold of the order of (brown) will be described. The processing apparatus 1 previously stores data on the mold switching time of various types of molds (for example, data on the mold switching time as shown in Table 4 is stored). Therefore, Table 4
3. From the mold switching time table of Table 1 and the color switching time table of Table 1, it is selected that the mold with the least mold switching time with the B mold is the C mold. The switching order of “red” → “white” → “brown” → “black” is selected as the color change by a method like the example. According to this, mold B →
Select the C mold, and in the C mold, "Red" → "White"
→ "Brown" → "Black" in the order of 50 minutes (B
Mold → C mold) +30 minutes (“red” → “white”) + 10 minutes (“white” → “brown”) + 10 minutes (“brown” → “black”) = 10
Since the switching time is 0 minute and the switching time is shorter than any other combination, the order of assigning the candidate orders is determined as described above, and the process of assigning to the equipment is performed.

[0023]

[Table 4]

Next, FIG. 6 is a flow chart showing the entire configuration operation of the invention according to claim 4 of the present invention. When an order is input, the processing apparatus 1 first checks the last order of the already scheduled schedule. Then, it is checked whether or not there is an order to be produced in the same mold as the final order of the already-scheduled order among the orders to be assigned. If there is an order to be produced with the same mold as the final order of the already-scheduled product, the order is assigned in the same manner as in the above-described embodiment of the first and second embodiments. On the other hand, if there is no order to produce with the same mold as the final order of the already scheduled schedule, the mold is exchanged. In this case, all the orders are given as candidates. Next, in consideration of the molding material before switching, the switching time is calculated from the mold of the final order and the mold of the candidate order used in the equipment that has been scheduled. Next, when all the candidate orders are assigned to the final order of the already-scheduled order, the order in which the orders are assigned is determined so that the required total switching time (that is, the time of the type switching + the time of the color switching) is minimized. . Next, the highest priority (first) order determined in this way is allocated, and the newly selected order is returned to the beginning again to check whether there is a different color order.

Here, a concrete example will be described. In the case where an order is input and there is an order to be produced with the same die as the final order of the already-scheduled process, processing is performed as in the first and second embodiments. Is done. On the other hand, if there is no order that can be produced with the same mold as the final order already scheduled, an order with a different mold is selected as a candidate.
For example, the mold of the last order on the already scheduled schedule is designated as mold B (red), and mold C (white,
Black, brown), D mold (white, black, brown), A mold (white, black,
The case where there is a mold of the order of (brown) will be described. The processing apparatus 1 previously stores data on the mold switching time of various types of molds (for example, data on the mold switching time as shown in Table 4 is stored). Therefore, Table 4
From the mold switching time table of FIG.
Mold switching time for mold, C mold and D mold, and "red",
The color switching time of “white”, “brown”, and “black” is calculated, and the order of the candidate dies is determined (in this case, all combination patterns are considered). In this way, B
Mold → A → C → D is determined, and the switching order of “red” → “white” → “brown” → “black” is selected as the color order. The total switching time in this case is 60 minutes (B mold → A mold) +30 minutes (“red” → “white”) + 10 minutes (“white” → “brown”) + 10 minutes (“brown” → “black”) )) +80
Minute (A mold → C mold) + 30 minutes ("Red" → "White") + 1
0 minutes ("white" → "brown") + 10 minutes ("brown" → "black") +
70 minutes (C mold → D mold) + 30 minutes ("red" → "white")
+10 minutes ("white" → "brown") +10 minutes ("brown" →
"Black") = 360 minutes, and the shortest mold switching time than any other combination, so the top priority A mold,
The order with "white" is selected.

Next, FIG. 7 is a flowchart showing the entire configuration operation of the invention according to claim 5 of the present invention. When an order is input, the processing apparatus 1 first checks the last order of the already scheduled schedule. Then, it is checked whether or not there is an order to be produced in the same mold as the final order of the already-scheduled order among the orders to be assigned. If there is an order to be produced with the same mold as the final order of the already-scheduled product, the order is assigned in the same manner as in the above-described embodiment of the first and second embodiments. On the other hand, if there is no order to produce with the same mold as the final order of the already scheduled schedule, the mold is exchanged. In this case, all the orders are given as candidates. Here, when the order includes a plurality of processes, it is considered that each task time (total production cycle) is the same. Next, a switching time is calculated from the final order and the candidate order before the switching in consideration of the molding material, the mold, and each process before the switching. Then, when a candidate order is assigned to the final order, the order that has the shortest switching time with the final order is selected, and the order that has the least switching time with the final order selected in this way is selected. Assignment is made so that the newly selected order returns to the beginning again and checks whether there is a different color order.

Here, a specific example will be described. In the case where an order is inputted and there is an order to be produced with the same mold as the last order of the already-scheduled process, processing is performed as in the first and second embodiments. Is done. On the other hand, if there is no order that can be produced with the same mold as the final order of the already scheduled schedule, the processing is basically performed in the same manner as in claim 3. In this embodiment, however, each order has a plurality of steps. Case (eg, mold, cooling / sizing equipment,
(When there are a plurality of processes by a take-off machine, a cutting machine, etc.) The processing is performed on the assumption that the task time of each process is the same. Now, assuming that the mold of the last order in the already scheduled schedule is B part number, the case where there are orders of A part number, C part number, and D part number as candidates for the type difference will be described. The processing device 1 stores data of the type switching time in advance (for example, data of the type switching time as shown in Table 5 is stored). Then, from the product type switching time table in Table 5, the C product number having the shortest total switching time with the B product number is selected. The switching time in this case is
The switching time (B part number → C part number) = 100 minutes, and the minimum part number switching time is shorter than any other combination. Therefore, the order having the C part number is selected.

[0028]

[Table 5]

Next, FIG. 8 is a flowchart showing the entire configuration operation of the invention according to claim 6 of the present invention. When an order is input, the processing apparatus 1 first checks the last order of the already scheduled schedule. Then, it is checked whether or not there is an order to be produced in the same mold as the final order of the already-scheduled order among the orders to be assigned. If there is an order to be produced with the same mold as the final order of the already-scheduled product, the order is assigned in the same manner as in the above-described embodiment of the first and second embodiments. On the other hand, if there is no order to produce with the same mold as the final order of the already scheduled schedule, the mold is exchanged. In this case, all the orders are given as candidates. Here, when the order includes a plurality of processes, it is considered that each task time (total production cycle time) is the same. Next, a switching time is calculated from the final order and the candidate order before the switching in consideration of the molding material, the mold, and each process before the switching. Then, the order of order assignment is determined so that the total switching time required when all the candidate orders are assigned to the final order is minimized. Next, the highest priority (first) order determined in this way is allocated, and the newly selected order is returned to the beginning again to check whether there is a different color order.

Here, a concrete example will be described. In the case where an order is inputted and there is an order to be produced with the same mold as the last order of the already-scheduled process, processing is performed as in the first and second embodiments. Is done. On the other hand, if there is no order that can be produced with the same mold as the final order of the already scheduled schedule, the processing is basically performed in the same manner as in claim 3. In this embodiment, however, each order has a plurality of steps. Case (eg, mold, cooling / sizing equipment,
(When there are a plurality of processes by a take-off machine, a cutting machine, etc.) The processing is performed on the assumption that the task time of each process is the same. Now, assuming that the mold of the last order in the already scheduled schedule is B part number, the case where there are orders of A part number, C part number, and D part number as candidates for the type difference will be described. The processing device 1 stores data of the type switching time in advance (for example, data of the type switching time as shown in Table 5 is stored). And the table
From the model switching time table of 5, the smallest total switching time is 3
00 minutes (B part number → A part number) + 100 minutes (A part number → C part
Number) + 100 minutes (C part number → D part number) = 500 minutes,
This order is the order in which the total switching time is minimized. But
Therefore, the A part number is selected as the next order.

[0031]

According to the first aspect of the present invention, as described above, when there are a plurality of orders of different colors that use the same mold as the mold of the equipment that has been scheduled, there is an allocation method.
Depending on the color of the order and the color of the order assigned before it
When all the orders, which are the sum of the switching times of the determined colors, are all assigned, the candidate orders are rearranged so that the total switching time of the necessary colors is minimized, and the process of assigning to the equipment is performed. Time can be minimized. Toes
Color switching time when multiple orders have different colors.
Evaluate the color switching time in relation to the color of the previous order
So that the total color switching time is minimized,
Easily create production plans that minimize total switching time
You can .

Further, according to the invention of claim 2, when there are many types of colors used, the colors of the final order used in the equipment scheduled beforehand and the colors of these provisionally assigned orders are respectively represented by shading colors. A plurality of colors are assigned to each of the color groups that have been classified into a plurality of colors, and the colors of the final order used in the equipment that has been scheduled and the colors of these provisionally assigned orders are classified. Since the order of the candidate color group is rearranged so that the total switching time required when all of the color groups to which the plurality of orders belong is minimized from the group and the process is assigned to the equipment, it is used. Even if there are many types of colors, the total switching time can be easily minimized.

According to the third aspect of the present invention, if the order of lot units for each process generated from the ordering order cannot be produced with the same mold as the mold of the equipment that has been scheduled, the molding equipment before switching is performed. In consideration of the molding material molded in the above, the order to replace the mold is temporarily assigned to the equipment, and when there are a plurality of orders to replace the mold, the mold of the final order used in the equipment scheduled and the temporary Since the order with the shortest switching time to the final order is selected and assigned to the equipment from the assigned dies of the order to be exchanged, the total switching time including the mold exchange can be minimized.

Further, in the invention according to the fourth aspect, in consideration of the molding material that has been molded in the molding equipment before the switching, the order for changing the mold is temporarily assigned to the equipment, and the order for changing the mold is temporarily assigned. When there are multiple orders, the total switching time required when all of these multiple orders are assigned is minimized from the final order molds used in the equipment already scheduled and the molds of these temporarily assigned molds to be exchanged. Since the order of the candidates is rearranged so that the highest-priority order is assigned to the equipment, the total switching time including the type change can be minimized.

In the invention according to claim 5, when the order is a plurality of steps, when it is considered that the task time of each step is the same, the time for switching the step to the final order is the shortest. Is selected and assigned to the equipment, so that even if the order includes a plurality of processes, the total switching time including all of the plurality of processes can be minimized.

In the invention according to claim 6, when the order is a plurality of steps, when it is considered that the task time of each step is the same, when there are a plurality of candidate orders,
From the scheduled final order and these tentatively assigned orders, sort the candidate orders so that the total process switching time required when all of these multiple orders are assigned is minimized, and assign the highest priority order. Since the assignment is made to the equipment, the total switching time including all of the plurality of processes can be minimized even when the order includes a plurality of processes.

[Brief description of the drawings]

FIG. 1 is a flowchart of one embodiment of the present invention.

FIG. 2 is a block diagram of the same.

FIG. 3 is a diagram showing the same color degree.

FIG. 4 is a flowchart of another embodiment of the above.

FIG. 5 is a flowchart of still another embodiment of the above.

FIG. 6 is a flowchart of still another embodiment of the above.

FIG. 7 is a flowchart of still another embodiment of the above.

FIG. 8 is a flowchart of still another embodiment of the above.

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-63-114610 (JP, A) JP-A-3-262622 (JP, A) JP-A-1-182020 (JP, A) Special issue / By molding system Cost Down, Takashi Aoba "Principle of Cost Reduction in Plastic Molding", Rikuo Shirase "Cost Down by FA Direction of Molding System", Synthetic Resins, Vol. 34, No. 8, published on August 1, 1988, p. 2-13 (58) Field surveyed (Int. Cl. ⁶ , DB name) B29C 45/00-45/82 B23Q 41/08 G06F 17/60

Claims (6)

(57) [Claims] 1. A method of scheduling a molding process, comprising:
Lot order is provisionally assigned to the scheduled equipment with the same mold as the mold used for the lot unit order for each process generated from the order, with priority given to the lot unit, and there are a plurality of these temporarily assigned orders From the color of the final order used in the equipment that has been scheduled and the colors of these provisionally assigned orders,
When switching colors determined by the assigned order color
The candidate order is rearranged so that the total color switching time required when all the multiple orders, which are the sum total, are minimized, and assigned to the equipment. A production order creation method for a molding process, wherein the next order is selected from the order orders and allocated if the order does not exist. 2. A method for scheduling a molding step, comprising:
Lot order is provisionally assigned to the scheduled equipment with the same mold as the mold used for the lot unit order for each process generated from the order, with priority given to the lot unit, and there are a plurality of these temporarily assigned orders Sometimes, the colors of the final order used in the equipment that has already been scheduled and the colors of these provisionally assigned orders are classified into a plurality of color groups, each of which is classified into a plurality of shades of light and shade, to perform rank classification. The total switching time required when all the color groups to which these multiple orders belong are assigned from the multiple color groups that rank the colors of the final order used in the equipment already scheduled and the colors of these temporarily allocated orders, respectively. The order of the candidate color group is rearranged so as to minimize it, and processing for assigning to the equipment is performed. On the other hand, there is no order that can be produced with the same mold. In the case, select the following order from the order the order, split production planning method of molding process, characterized in that the put. 3. A method for scheduling a molding step, comprising:
If the lot order for each process generated from the order cannot be produced with the same mold as that of the equipment that has been scheduled, the mold should be replaced in consideration of the molding material that was molded in the molding equipment before the change. When the order is temporarily assigned to the equipment, and there are a plurality of orders for which the mold is to be exchanged, the final order used for the scheduled equipment and the mold for which the temporarily assigned mold is to be exchanged are used to determine the final order. 3. The method according to claim 1, wherein an order having a minimum switching time is selected and assigned to the equipment. 4. A method for scheduling a molding step, comprising:
If the lot order for each process generated from the order cannot be produced with the same mold as that of the equipment that has been scheduled, the mold should be replaced in consideration of the molding material that was molded in the molding equipment before the change. When orders are temporarily assigned to the equipment and there are a plurality of orders for which the molds are to be exchanged, the plurality of orders are determined from the molds of the final order used in the equipment that has been scheduled and the molds for which these temporarily assigned molds are to be exchanged. 3. A process according to claim 1 or 2, wherein the order of the candidates is rearranged so that the total switching time required when all the items are allocated is minimized, and the highest priority order is assigned to the equipment. How to create a production plan for the process. 5. When the order is a plurality of processes, when the task time of each process is considered to be the same, a process for selecting the order with the shortest process switching time with the final order and assigning it to the equipment is characterized. The method for producing a production plan of a molding process according to claim 3. 6. When it is considered that the task time of each process is the same when there are a plurality of processes, and when there are a plurality of candidate orders, these are determined from the final schedule already scheduled and these temporarily allocated orders. 5. The molding process according to claim 4, wherein the candidate orders are rearranged so that the total process switching time required when all of the plurality of orders are assigned is minimized, and the highest priority order is assigned to the equipment. Production plan creation method.