JP2008059416A - Method for adjusting member production command in equivalent production system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for adjusting a member production command capable of switching a mold lot and a member lot properly without damaging mold efficiency even when a member product process is unstable and shortage or excess occurs to member achievement in an equivalent production system. <P>SOLUTION: A normal command amount of each lot of a member command is a basic command amount necessary for one lot in a molding process and order of production of a mold lot corresponds to order of product command of members. When there is a certain amount of stock, the member production command is stopped by the prescribed number of lots N, an (N+1)th lot to be commanded to produce is a lot to be adjusted. An amount of production command to be issued to the lot to be adjusted is an amount which adds to the normal command amount an adjustment amount set on the basis of a sum of an amount of stock to be an amount of produced members and a fixed amount of commands to be an amount of members to be produced in the lot to be produced. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention provides the above-mentioned member to be supplied in an equal volume production system in which a member supplied to a molding process for assembling and molding a plurality of members is produced and supplied as an amount required for one lot of the molding process. It is related with the method of adjusting the production amount.

In the tire molding process, each carcass ply, bead, side tread, belt, top tread, etc., produced in separate member production processes, are attached to the molding drum in order, and the tire is assembled into a single tire. In tire factories that perform conventional mass production, for example, treads, belts, plies, etc. are fully wound on a reel, and the above-mentioned members are sufficient for the tire molding lot. Only the amount is supplied.
On the other hand, in tire factories that produce a variety of products in small quantities, a so-called equal production system is employed in which the production amount of one lot of each member is produced and supplied in an amount necessary for one lot of tire molding. For example, when the number (base) per lot of the molding process is 100 and the length of the tread member (unit basis) required for one tire is 1.3 m / piece, the above-mentioned tread member, etc. The quantity member command is (radix) × (member unit length) = 100 × 1.3 = 130 m / cart. In this way, when the production amount per lot of the member is performed based on the above-mentioned equivalent member command, the supply member can be used up for each molding lot, so that the molding efficiency can be improved and the molding can be performed. Since the process does not hold inventory, there is an advantage that space can be used effectively.

  However, with the above-mentioned equivalent member command, when a trouble occurs in the member production process and the supply of the necessary member is delayed, such as when the switching of the molding lot does not match the member switching timing, the member can be prepared. The molding operation must be interrupted until the molding efficiency is adversely affected. In addition, when the member production process, which is the previous process, is unstable, a lot of edge processing occurs, so that not only the number of edge processing steps increases, but the amount of members that can be molded (member results) is insufficient. Will occur. For this reason, there has been a problem that the person in charge of the command has to reissue the member command each time.

  The present invention has been made in view of the conventional problems, and in an equivalent production system, even if the member production process is unstable and the member performance is excessive or insufficient, the molding lot can be obtained without impairing the molding efficiency. It is an object of the present invention to provide a method for adjusting a member production command, which can appropriately switch between and change a member lot.

The invention according to claim 1 of the present application is a molding process in which a plurality of types of members manufactured in a plurality of member production processes are combined to produce a molded product. From each member production process to one lot of the molding process. In an equivalent production system for producing and supplying a necessary quantity as one lot, a method for adjusting a member production command for commanding the production amount of the member, wherein the production order of the molding lot and the production command order of the member are Along with this, the production command for the member is discontinued at a predetermined number of lots N, and the production command amount for the member to be commanded next is changed to a preset production command amount, which is the quantity of the already produced member. And supply to the molding lot by setting the adjustment command amount to which the adjustment amount set based on the sum of the determined command amount, which is the amount of the member scheduled for production in the lot for which the production command has already been issued, is added Adjust production volume It is characterized in that it has to be.
The invention according to claim 2 is the method for adjusting a member production command in the equal production system according to claim 1, wherein the production command amount for one lot of each member is an amount necessary for one lot of the molding process. It is characterized in that an amount of hunting for preventing hunting of the adjustment amount is added to the above.

According to a third aspect of the present invention, in the method for adjusting a member production command in the equivalent production system according to the second aspect, when the number of confirmed member lots is N, the inventory amount and the confirmed command amount When the sum exceeds (N + 1) lots of the molding process, the member to be commanded next is cut.
According to a fourth aspect of the present invention, in the method for adjusting a member production command in the equal production system according to the second aspect, the sum of the stock quantity and the confirmed command quantity is N lots of the molding process (N + 1). When more than half of the lot can be covered, an adjustment command amount that is a command amount of a member to be commanded next is set to a value obtained by adding the remaining amount of the (N + 1) lot to a preset production command amount, A member lot corresponding to a subsequent molding lot is deleted.
According to a fifth aspect of the present invention, in the method for adjusting a member production command in the equal production system according to the first or second aspect, the sum of the stock quantity and the confirmed command quantity is equal to N lots of the molding process. If the amount is insufficient, the adjustment command amount, which is the command amount of the member to be commanded next, is set to a value obtained by adding the shortage to a preset production command amount.
According to a sixth aspect of the present invention, in the method for adjusting a member production command in the equal production system according to the first or second aspect, if the member is not in production, the command amount of the member to be first produced is commanded. Is adjusted according to the stock quantity of the member.

According to the present invention, in a molding process in which a plurality of types of members manufactured in a plurality of member production processes are combined to produce a molded product, the amount required for one lot of each molding process from each member production process is 1 In an equal-volume production system that is produced and supplied as a lot, the production order of molding lots and the order of production commands for members are made to correspond to each other, and the production command for the members is terminated at a predetermined number of lots N, and then the production command is issued. Based on the sum of the production command quantity for the parts, the preset production command quantity, the stock quantity that is the quantity of the parts that have already been produced, and the fixed command quantity that is the quantity of the parts that are scheduled to be produced in the production schedule lot By setting the adjustment command amount with the adjustment amount set in advance, the production amount of the members to be supplied to the molding lot can be adjusted in advance, so the member production process is unstable and there is an excess or deficiency in the member results If it happens , Can be carried out properly the O switch of the switch and the member lots molding lot, it is possible to reliably prevent a reduction in molding efficiency.
At this time, if the production command amount of each member is the amount required for one lot of the molding process plus an anti-hunting amount for preventing the hunting of the adjustment amount, the member in question due to trouble in the molding process Even when the amount of the used amount increases slightly, the increment can be absorbed in the same supply lot, so that the molding efficiency can be improved.

In addition, when the determined member lot is the Nth lot, the member production process is stable, and the sum of the stock quantity and the determined command amount is used for the (N + 1) th lot of the molding process. If the amount to be produced is exceeded, the next production command is cut, so that the correspondence between the production order of the molding lot and the production command of the member can be maintained, and management becomes easy. .
Further, when the sum of the stock quantity and the confirmed command quantity can cover more than half of the (N + 1) th lot of the molding process, an adjustment command quantity that is a command quantity of a member to be commanded for production is set in advance. If a value obtained by adding the required amount of the (N + 1) -th lot to the set production command quantity and deleting the member lot corresponding to the subsequent molding lot, the production order of the molding lot and the production of the member Correspondence with the order of commands can be maintained.
On the other hand, when the member production process is unstable and the sum of the stock quantity and the determined command quantity is less than the Nth lot of the molding process, the command quantity of the next production command is used. If an adjustment command amount is set to a value obtained by adding the above shortage to a preset production command amount, the material supply can be adjusted to adjust the shortage of the member results, so the reduction in molding efficiency is ensured. Can be prevented.
In addition, when the member is not in production, if the command amount of the member to be commanded for production first is adjusted according to the stock amount of the member, the molding lot and the member lot are switched appropriately. be able to.

Hereinafter, the best mode of the present invention will be described with reference to the drawings.
FIG. 1 is a diagram showing an outline of a method for adjusting a member production command in the equal production system according to the best mode, and there is a shortage of members (member results) that can be molded in the molding process 10 for adjustment of a member production command. When the stock of each member such as the top tread 31, the side tread 32, the bead 33, the ply (carcass cord) 34 is accumulated to some extent in each member production process 21 to 24 instead of performing after the situation occurs. The member production commands D1 to D4 issued to the respective member production steps 21 to 24 are discontinued at a predetermined number of lots N, and the N + 1th lot to be produced next is designated as an adjustment target lot. The production command quantity to be used is the above-mentioned normal command quantity, and the stock quantity that is the quantity of parts already produced and the confirmed command quantity that is the quantity of parts scheduled to be produced in the production lot It is obtained so as to the amount obtained by adding the adjustment amount is set based on the sum.
Here, the production command amount to each lot of the member command is a constant amount except for the adjustment lot described later, and is a constant length of about 10 m to the amount (basic command amount) required for one lot of the molding process. It shall be added. This additional amount is added to prevent hunting of the adjustment amount, and is hereinafter referred to as an anti-hunting amount. The sum of the basic command amount and the hunting prevention amount is referred to as a normal command amount.

Next, the adjustment method of the present invention will be specifically described with reference to FIGS.
In FIGS. 2 and 3, for the sake of simplicity, only the top tread is used as a member to be supplied to the molding process, and two reels are used in one molding lot. Not necessarily, it may be a length unit or a weight unit.
Further, in principle, the member commands are synchronized with the start order of the molding command lot, and the production adjustment is performed based on the order of the molding lot. That is, the member produced in the Nth member lot is supplied to the Nth molding lot. Hereinafter, the Nth member lot is referred to as a member lot N, and the Nth molding lot is referred to as a molding lot N.
It should be noted that adjustment of production commands for other members such as side treads, beads, and plies can be performed in the same manner as the top tread.
As shown in FIG. 2, assuming that the number of lots of members (in this case, top treads) for which a member production command has already been made is N = 4, when the member production process is stable, The reels have already been wound up and the parts are in stock (actual results). The actual results (for 5 reels) and the amount of the parts for which production has been confirmed and the production has been finalized (normal command amount-actual results) This is hereinafter referred to as a fixed lot) and the amount of members that can be supplied to the molding process is 8 reels including 3 reels. Since the normal command amount includes a hunting prevention amount for preventing hunting of the adjustment amount, when the molding operation is performed without any trouble in the molding process, the above 8 reels cover the molding lots 1 to 4. There will be surplus even after. This excess tread is supplied to the molding lot 5. At this time, if all of the tires to be molded in the molding lot 5 can be covered with the surplus tread, the production of the member lot 6, which is the lot of the member to be commanded next, is cut and the production is started from the molding lot 7. To resume. As a result, since the subsequent molding lot 6 is supplied from the member lot 5, it is possible to appropriately switch the molding lot and the member lot.
In addition, as shown in FIG. 2, when more than half of the molding lot 5 can be covered by the surplus tread, the member lot 5 is set as the adjustment target lot, and the production command amount is set to the normal command amount as the molding lot 5. It is set as the value which added the adjustment part (here 1 reel) more than the quantity used for the remaining tires. Thereby, the molding lot 5 can be molded by supplying the material from the member lot 5 and the molding of the molding lot 6 can be covered with the tread produced by the normal command amount of the member lot 5. Therefore, in this case, if the member lot corresponding to the subsequent molding lot 6 is cut, the member lot to be supplied to the molding lot 7 can be the member lot 7. Therefore, the switching of the molding lot and the switching of the member lot Can be performed properly.
If the surplus tread cannot cover half of the molding lot 5, the member lot 5 may be produced as the normal command amount without using the adjustment lot.

FIG. 3 is a diagram illustrating an example of a method for adjusting a member production command when the member production process is unstable. In this case as well, similar to FIG. 2 above, based on the sum of the stock quantity and the confirmed command amount. Set the production command quantity of the adjustment target lot.
Specifically, when the number of member lots for which a member production command has already been made is N = 4, the member production process is unstable, for example, a trouble occurs in the extrusion process, and one reel for the third lot. Suppose that there were only 3 reels. On the other hand, since the determined lot is a calculated value, if it is calculated as 3 reels as it is, the supplyable amount to the molding process will be 6 reels, but the normal command amount includes the hunting prevention amount, so there is no major trouble in the molding process When a molding operation is performed, the above six reels cannot cover the first to third reels of the molding lot, and the molding lot 4 is expected to be insufficient. Therefore, in this case, the member lot 5 is set as the adjustment target lot, and the production command amount is set to a value obtained by adding the shortage of the molding lot 4 to the normal command amount. As a result, the molding lot 5 can be molded by supplying the material from the member lot 5, and the member production command for the molding lot 6 and thereafter can be kept at the normal command amount, as shown in FIG. Therefore, it is possible to appropriately switch the molding lot and the member lot.

Thus, according to this best mode, the normal command amount of each lot of the member command is set as the basic command amount required for one lot of the molding process, and the production order of the molding lot and the order of the production command of the member When a certain amount of stock is accumulated, the member production command is terminated at a predetermined number of lots N, and the N + 1th lot to be commanded next is set as the adjustment target lot, and the production command amount issued to the adjustment target lot is set as above. An amount obtained by adding an adjustment amount that is set based on the sum of the stock amount, which is the amount of parts already produced, and the confirmed command amount, which is the amount of members scheduled to be produced in the production lot, to the normal command amount; As a result, even if there is an excess or deficiency in the member performance, the switching of the molding lot and the switching of the member lot can be performed properly, and a reduction in molding efficiency can be reliably prevented.
Also, if the normal command amount is set to the basic command amount plus an anti-hunting amount for preventing hunting of the adjustment amount, there is a problem in the molding process, and the amount of use of the member slightly increases. Even in this case, the increment can be absorbed within one lot, so that the molding efficiency can be improved.

In the best mode described above, the top tread is taken as an example of the supply member member, and the member used in one molding lot is two reels. However, the present invention is not limited to this, depending on the size of the molding lot and the full amount of reels, Three reels or four reels may be used. On the other hand, a member such as a bead that cannot be made into a reel unit may be made into a length unit or a pair unit. Further, treads, belts, and the like can be further finely adjusted if they are not in reel units but in length units.
In addition, as for the member production command amount, it is possible to use only the basic command amount as usual, but if there is some trouble in the molding process by adding the hunting prevention amount as in this example, Is preferable because it can be processed in the same supply lot.

In the above example, the method for adjusting the member command during the production of the member has been described. However, when the member is not in production, the command amount of the member to be commanded for production first is adjusted according to the inventory amount of the member. You can do it.
Specifically, as shown in FIG. 4 (a), up to the fourth molding lot can be covered by the stock produced in the fourth member lot, but the fifth lot cannot cover more than half of the stock. In this case, the member lot 5 may be an adjustment lot, the production command amount may be a value obtained by subtracting the amount that can be covered by inventory from the normal command amount, and the production command amount after the member lot 6 may be the normal command amount. As a result, thereafter, since it is only necessary to correspond the member lot N to the molding lot N, it is possible to appropriately switch the molding lot and the member lot. Note that when adjusting the member amount in units of reels, it is difficult to reduce the amount, so the member lot 5 may be a normal lot instead of an adjustment lot.
On the other hand, as shown in FIG. 4B, when the fifth lot can be covered more than half by stock, the production command amount of the member lot 5 is set to the sum of the normal command amount and the amount that cannot be covered by the stock. The member lot 6 may be deleted, and the production command amount after the member lot 7 may be set as the normal command amount. In this case as well, thereafter, since the member lot N only needs to correspond to the molding lot N, it is possible to appropriately switch the molding lot and the member lot.

  As described above, according to the present invention, even when the member production process is unstable and there is an excess or deficiency in the member performance, the switching of the molding lot and the switching of the member lot are appropriately performed without impairing the molding efficiency. Therefore, the work can be performed without impairing the molding efficiency.

It is a figure which shows the outline | summary of the adjustment method of the member production command which concerns on this best form. It is a figure which shows an example of the adjustment method of the member production command which concerns on this best form. It is a figure which shows the other example of the adjustment method of the member production command which concerns on this best form. It is a figure which shows the adjustment method of member production instruction | command when a member is not in production.

Explanation of symbols

10 molding process, 21-24 member molding process, 31 top tread,
32 side tread, 33 bead, 34 ply, D1-D4 member production command.

Claims (6)

  Produces and supplies the required quantity for each lot of the above molding process from one part production process to a molding process that produces a molded product by combining multiple types of members manufactured in multiple parts production processes. In the equal production system, a method for adjusting a member production command for commanding the production amount of the member, wherein the production order of the molding lot corresponds to the production command order of the member, and the production command of the member is predetermined. The production command quantity of the member to be ordered next is censored with the number of lots N, and the stock quantity that is the quantity of the parts already produced and the production in the lot for which the production command has already been issued to the preset production command quantity The adjustment command amount added to the adjustment amount set based on the sum of the fixed command amount that is the amount of the planned member is set to the adjustment command amount, and the production amount of the member supplied to the molding lot is adjusted. Features Method of adjusting member production command in an equal volume production systems.   2. The production command amount for one lot of each member is an amount obtained by adding a hunting prevention amount for preventing the hunting of the adjustment amount to an amount necessary for one lot of the molding process. The adjustment method of the member production instruction | command in the equal quantity production system of description.   If the confirmed part lot is the Nth lot and the sum of the stock quantity and the confirmed command quantity exceeds the quantity used for the (N + 1) th lot in the molding process, the next production The method for adjusting a member production command in an equivalent production system according to claim 2, wherein a member to be commanded is cut.   If the determined part lot is the Nth lot and the sum of the stock quantity and the determined command quantity can cover more than half of the (N + 1) th lot in the molding process, then the production command The adjustment command amount that is the command amount of the member to be made is a value obtained by adding the necessary amount of the (N + 1) th lot to the preset production command amount, and the member lot corresponding to the subsequent molding lot is deleted The method for adjusting a member production command in the equivalent production system according to claim 2.   If the determined lot of the member is the Nth lot and the sum of the stock quantity and the determined command amount is less than the Nth lot in the molding process, the production command is next. 3. The member production command in the equal production system according to claim 1, wherein an adjustment command amount, which is a member command amount, is set to a value obtained by adding the shortage to a preset production command amount. Adjustment method. The equal production according to claim 1 or 2, wherein when a member is not in production, the command amount of the member to be commanded for production first is adjusted according to the inventory amount of the member. Adjustment method of material production command in the system.

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