JP2006062205A - Method and apparatus for step changing of mold - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the efficiency of production by preventing a line stopping loss by carrying out the step change of a mold in a circuit line for producing a foamed resin product. <P>SOLUTION: In the step change of the mold 1 in the circuit line CL, in a direction change part from a straight movement part CL1 in one direction in the circuit line CL to a rotation movement part CL3, the mold 1 to be subjected to the step change is prevented from entering the rotation movement part CL3 and moved straight by the operation of a mold carrying-out apparatus 20 to be carried outside the line, and in a direction change part from the following rotation movement part CL3 to a straight movement part CL2 in the other direction, the mold 1 for the step change is moved straight from the outside of the line by the operation of a mold insertion apparatus 30 to be inserted into a space part formed by the mold carrying-out. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a molding die changeover method and apparatus in a circuit line for producing foamed resin products such as cushion pads for seats.

  Foamed resin products such as polyurethane seat cushion pads usually use a molding die consisting of an upper mold and a lower mold, and the foamed resin material (foamed resin stock solution) with the upper mold open relative to the lower mold Is injected into the lower mold, and then the upper mold is closed with respect to the lower mold, and then heated foaming is performed through the heating zone, and then the mold is opened to take out the molded product (product). It is manufactured through a process.

  Normally, the molding die is mounted on a carriage, and this is a predetermined production line formed by arranging the series of steps, and in particular, the two ends in the longitudinal direction are largely turned (U-turned) and continuously in an annular shape. In general, a foamed resin product is molded and manufactured for each molding die of each carriage while continuously moving along a so-called circuit line.

  By the way, in the circuit line for manufacturing the foamed resin product, a so-called change-over operation for exchanging a molding die on the line is required in accordance with a change in the type of product to be manufactured. In particular, in the case of production of a large variety of small lots, the frequency of the changeover is increased.

  Conventionally, in the circuit line changing, the line is temporarily stopped, and using a crane, a hoist, a forklift or the like, as shown in FIG. Only the mold 101 is taken down from the line, and a new molding die 101 for changing the position is inserted into the vacant portion for each carriage 110 or only the die 101. That is, due to this change of stage, a manufacturing loss that temporarily stops the line occurs. In particular, the greater the number of changeovers, the longer the line stop time and the lower the production efficiency.

In addition, as in Patent Document 1 below, a proposal has been made to shorten the changeover time by replacing all or part of a dedicated portion forming the cavity, leaving the general-purpose portion of the molding die. However, in this case as well, there is no change in temporarily stopping the line for the change of stage, which also causes a production loss, which reduces the production efficiency.
JP 2003-191063 A

  The present invention has been made in view of the above, and in a circuit line for producing a foamed resin product such as a cushion pad for a seat, the operation of the line is stopped by changing the molding die continuously transferred. It is possible to eliminate the temporary line stop loss, improve the production efficiency, and provide a mold changeover method and changeover apparatus that can automate the changeover work. is there.

  The molding die changeover method of the present invention that solves the above-mentioned problems is such that a plurality of molding dies are moved at predetermined intervals, and foamed resin material injection, mold closing, heating, mold opening, product removal, etc. In a circuit line for forming and manufacturing a foamed resin product by sequentially passing the process, when changing the molding die, the direction changing unit from the linearly moving part in one direction to the turning part in the circuit line The mold to be replaced is moved straight without entering the turning movement part and carried out of the line, and the subsequent direction changing part from the turning movement part to the straight movement part in the other direction is used for changeover. The molding die is linearly moved from the outside of the line and inserted into the space portion by the die carrying out.

  As a result, the direction change part between the straight line movement part and the turning movement part of the circuit line can be used to carry the molding die to be changed out of the circuit line out of the line and insert a new molding die for the changeover. It can be easily performed by moving straight without stopping the line.

  Further, according to the changeover method of the present invention, in the control unit that controls the operation of the circuit line, a forming die to be changed over is registered in advance by a number or the like, and the forming die is moved from the rectilinearly moving unit. When the position of the direction changing part to the turning movement part is reached, the mold carry-out device is operated to move the molding die straight forward and automatically carry it out of the line. When the direction changing part from the turning moving part to the straight moving part is reached, the molding die for changeover is moved straight from the outside by the operation of the die inserting device and automatically inserted into the space portion. It is characterized by that. Thereby, the changeover of the molding die can be automatically performed without stopping the line.

  In the above change-over method, each molding die is mounted on a carriage, and each carriage is moved along a guide rail along the circuit line, and when the molding die is changed, the mold in the guide rail is changed. By changing the part of the rail portion near the direction changer on the mold unloading side and near the direction changer on the mold insertion side to the straight traveling direction, the changeover is performed by carrying out and inserting for each traveling carriage. Work can be further simplified and automated.

  Further, the present invention provides a change-over device for carrying out the change-over method, wherein a plurality of molding dies are moved at a predetermined interval to inject a foamed resin material, close the mold, heat, open the mold, and take out the product. In a circuit line for forming and manufacturing a foamed resin product by sequentially passing through each process such as the above, molding of a target to be changed is placed in the vicinity of a direction changing part from a linearly moving part in one direction to a turning part in the circuit line. A mold unloading device is provided that moves the mold straightly without entering the turning movement part and carries it out of the line. Provided with a mold insertion device for linearly moving a molding die from outside the line and inserting it into a space portion by carrying out the die, and changing the molding die by operating the die carry-out device and the die insertion device To do It is characterized in. Thereby, the said change-over method can be implemented suitably.

  The mold unloading device and the mold insertion device are each connected to a control unit that controls the operation of the circuit line, and the molding die to be changed in advance registered in the control unit is transferred from the rectilinear movement unit to the turning When the position of the direction changing unit to the moving unit is reached, the mold unloading device is operated by a command from the control unit, and the space portion due to the mold unloading changes the direction from the turning moving unit to the straight moving unit. The mold insertion device may be configured to operate in response to a command from the control unit when reaching the part. As a result, in accordance with the movement of the molding die, the molding die to be changed can be carried out, and a new molding die for changing the setup can be inserted, and the setup change operation can be performed smoothly and automatically. Can do.

  In the present invention, each molding die is mounted on a carriage, and each carriage is provided so as to move along a guide rail along the circuit line. Each of the rail portions in the vicinity of the direction changing portion and in the vicinity of the direction changing portion on the mold insertion side is provided so as to be switchable in the straight direction of movement in the same row as the straight movement portion, The rail portion is sometimes switched in the straight direction, and the mold is carried out and inserted for each carriage by the respective operations of the mold carry-out device and the mold insertion device. be able to.

  The circuit line is continuously and annularly rotated along the line, and is engaged with a protrusion on one side of the carriage on which the molding die is mounted to push the carriage. The joint portion may be provided with a moving means attached at regular intervals in the longitudinal direction, and each carriage may be configured to move in a non-connected state. Thereby, the said trolley | bogie can be moved without couple | bonding with a moving means, and automatic carrying out at the time of a setup change and automatic insertion can be enabled.

  The mold unloading device and the mold insertion device each include a moving means that reciprocates in a straight direction along an extension of the straight moving portion of the circuit line, and each moving means is engaged with the carriage. A flexible engagement means is provided, and at the time of changeover, the carriage mounted with the molding die to be changed or the molding die for changeover is moved straight. it can.

  As described above, according to the changeover method and changeover device of the molding die of the present invention, the changeover of the molding die that is continuously transferred in the circuit line for producing foamed resin products such as a cushion pad for seats. Without stopping the operation of the line, that is, while continuing the operation, eliminating the temporary loss of line stop for the conventional changeover, improving the production efficiency, and Replacement can also be automated.

  Next, embodiments of the present invention will be described based on examples shown in the drawings.

  FIG. 1 is a schematic plan view schematically showing the outline of a circuit line in the present invention, FIG. 2 is a schematic explanatory view of a changeover method in the circuit line, and FIG. 3 is a molding die in the circuit line. FIG. 6 is a schematic plan view showing a moving means of a bogie equipped with a trolley, a track for moving the bogie, and a guide rail (the bogie is omitted). 4 is an enlarged schematic plan view of a part of the circuit line of the above-described circuit line in a moving state, FIG. 5 is an enlarged plan view of the same part of the truck, and FIG. 6 is a side view of a part of the space between the front and rear trucks. FIG. 7 is a front view of the carriage in the circuit line. FIG. 8 is a schematic enlarged plan view of a part of the mold carry-out device, FIG. 9 is a schematic enlarged plan view of a part of the mold insertion device, and FIG. 10 is a schematic explanatory diagram of a guide rail switching mechanism.

  A circuit line CL in FIG. 1 is a line for molding and manufacturing a foamed resin product such as a cushion pad for an automobile seat, for example, and both ends in the longitudinal direction are continuous in a substantially rectangular ring shape as a turning movement part. . That is, the reciprocating rectilinearly moving parts CL1 and CL2 that are parallel to each other are continuous through the rotating and moving parts CL3 and CL3 at both ends in the longitudinal direction.

  Basically, in the circuit line CL, for example, a molding die 1 composed of an upper die 1a and a lower die 1b that forms a predetermined cavity corresponding to a foamed resin product to be manufactured by closing the die is illustrated. Two sets of trucks 10 are mounted on the transfer truck 10 so as to continuously move and move the trucks 10 required for manufacturing according to a molding cycle or the like at predetermined intervals. In particular, each manufacturing process provided along the linearly moving portions CL1 and CL2, ie, an injection process A for injecting a foamed resin material (raw solution such as polyurethane) into the lower mold in the mold open state , Mold closing process B for closing the upper mold with respect to the lower mold, heating process C for heating and foaming the foamed resin material, mold opening and product removal for opening the upper mold and taking out the molded product (product) And by sequentially passing through the respective steps such as step D, and is configured to produce by molding a predetermined foamed resin product. Usually, as shown in FIG. 1, the injection step A and the subsequent mold closing step B are performed on one of the linearly moving parts CL1, and the heating step C and the mold opening and product removal step D are performed on the other side. It arrange | positions at the rectilinear movement part CL2.

  As shown in FIGS. 5 and 7 in an enlarged manner, the carriage 10 on which the molding die 1 is mounted is provided with a lower mold base 12 on a base plate 11 serving as a base. The lower mold 1b is fixed to the upper mold 1 and the upper mold 1a is fixed to the upper mold frame 13 provided to the lower mold frame 12 so as to be opened and closed by a pin connection structure. The upper frame 1a is configured to open / close with respect to the lower mold 1b when the frame 13 is opened / closed with respect to the lower mold frame 12. In the state where the upper mold 1a is closed with respect to the lower mold 1b, a cavity 1c corresponding to the product is formed.

  On the lower surface of the base plate 11 of the carriage 10, traveling wheels 14 each having a traveling tire structure or a rubber roller structure are provided in the vicinity of the four corners. Further, a traveling movement projection 15 is provided which protrudes from the side of the base plate 11 on the inner edge side of the circuit line CL. Further, a guide roller 16 is provided on the lower surface of the base plate 11 so as to protrude downward while removing the position of the wheel 14, and the guide roller 16 is provided on the floor surface of the circuit line CL described later. By being guided by the guide rail, it is provided so as to be able to travel stably on a predetermined track without deviation.

  Further, one side portion of the carriage 10, particularly one side portion outside the circuit line CL, protrudes outward and is provided with a mold carry-out device 20 and a mold insertion device 30 for changeover described later. Engagement projections 17 and 17 on which engagement means described later act are provided in a projecting manner with a space therebetween.

  On the other hand, two parallel annular tracks 2 on which wheels 14 on the lower surface of the carriage 10 are mounted are provided on the floor surface of the circuit line CL that travels and moves the carriage 10. Further, along the inner edge side of the circuit line CL of the track 2, a guide rail 3 that forms a guide groove portion 3c between the two rail bodies 3a and 3b with a pair of two parallel inner and outer rail bodies 3a and 3b. The carriage 10 is configured such that the guide roller 16 on the lower surface thereof is fitted into the guide groove 3c so that the wheel 14 can travel on the track 2 without lateral displacement.

  The circuit line CL is provided with a moving chain 4 as a moving means that rotates endlessly along the inner periphery of the traveling portion of the carriage 10, and a predetermined interval in the longitudinal direction of the chain 4. Each time, an engaging member 5 that can be engaged and pushed with respect to the protruding portion 15 protruding from the side portion of the carriage 10 is attached. Thus, the cart 10 is continuously moved while being held at a constant interval.

  6a, 6b, 6c, and 6d in the figure are sprockets that rotatably support the endless moving chain 4 as the moving means at a predetermined height position in the rotating and moving parts CL3 and CL3, respectively. Among them, one sprocket 6a of the two sprockets 6a, 6b in one turning moving part CL3 is provided by a drive source 7 such as a motor and a transmission chain 8 to be given a predetermined rotation, The moving chain 4 is provided to rotate at a predetermined speed by the rotation of the sprocket 6a. The carriage 10 is moved and moved by the rotation of the moving chain 4.

  The carts 10 are engaged with each other so that the interval between the two molding dies 1 and 1 mounted on the cart 10 is substantially the same as the interval between the molding dies 1 and 1 of the front and rear carts 10 and 10. The position of the member 5 is set. Further, as shown in FIGS. 5 and 6, the front and rear portions of the carriage 10 are provided with a spring 9a for reducing impact upon contact with one of them, and a protrusion 9b such as a bolt for contacting with the spring 9a on the other. It is attached. Thereby, the protrusion 15 is pushed and moved by the engagement member 5 from the rear, and the impact at the time of contact between the carts 10 and 10 not connected to each other is reduced, and a predetermined interval is set. It has come to possess.

  In the changeover method according to the present invention, when the molding die 1 is changed over in the circuit line CL, the linear movement part CL1 in one direction in the circuit line CL is changed to one turning movement part CL3. In the direction changing portion, the molding die 1 to be changed is moved straight without entering the turning movement portion CL3 and carried out of the line, and subsequently transferred from the turning movement portion CL3 to the straight movement portion CL2 in the other direction. In the direction changing portion, a new molding die 1 for changing the position is moved straight from the outside of the line and inserted into the space portion S by carrying out the die.

  In order to enable unloading and insertion for changing the shape of the molding die 1, the direction changing part (corner part) from the linearly moving part CL1 in one direction of the circuit line CL to one turning part CL3 is provided. In the vicinity, there is provided a mold carry-out device 20 that moves the molding die 1 to be changed to a straight line without proceeding to the turning movement part CL3 and carries it out of the line. Further, a new molding die 1 for changeover is moved straight from the outside of the line in the vicinity of the direction changing portion (corner portion) from the turning moving portion CL3 to the straight moving portion CL2 in the other direction. A mold insertion device 30 is provided for insertion into the space portion S by the mold carry-out.

  In the case of the illustrated embodiment, as the mold carry-out device 20, as shown in FIG. 8, the linear movement part CL1 and the length of at least one carriage 10 in the circuit line CL are extended from the corresponding positions. An auxiliary track 22 extending in a straight direction is provided in the direction, and a moving means that is reciprocated in the straight direction by being spanned by the sprockets 21a and 21b at both ends along the auxiliary track 22 outside the circuit line CL. A chain 24 is provided. The chain 24 is provided with a pair of engaging means 25, 25 such as a chuck arm that is detachable with respect to the engaging projections 17, 17 protruding from the outer edge of the carriage 10, The engagement means 25, 25 engages with the engagement protrusions 17, 17 at a position corresponding to the linear movement portion CL1, and moves in the unloading direction by the operation of the chain 24. It is provided so that it can be moved straight out of the line without moving to the rotational movement part CL3.

  The engaging means 25, 25 are provided, for example, such that the base member 26 attached to the chain 24 can be moved up and down by appropriate means, and can be displaced in the approaching direction. (When not changing), the carriage 10 is held above the position of the engagement projections 17 and 17 of the carriage 10, and at the time of changing the stage, the carriage 10 on which the molding die 1 to be changed is mounted is moved straight. When the engagement means 25, 25 is lowered to the height position of the engagement protrusions 17, 17 when moving from CL1 to a predetermined position of the direction changing portion to the one turning movement portion CL3, and By displacing each other in the approaching direction, the engaging protrusions 17 and 17 can be sandwiched from the front and rear to be held in an engaged state, and can be detached after being carried out. Of course, the engaging projections 17 and 17 can be detachably provided by engaging means other than the above. In the figure, 27 is a motor for driving the chain 24.

  Furthermore, in order to enable the carriage 10 to be carried out, the guide rail 3 in the circuit line CL is enlarged at the location of the direction changing portion which becomes the carry-out portion as shown in FIG. A part of the guide rail 3 provided along the rail, in particular, a part of the rail part of the outer rail body 3b is constituted by a switching rail member 3d2 separated from the other main rail part, and the rail member 3d2 is provided so as to be able to expand outward (refer to the chain line in FIG. 10) around the pivot shaft 28 close to the straight movement portion CL1, and when the cart 10 carrying the molding die 1 is carried out. By expanding the rail member 3d2 as described above, the carriage 10 can be moved straight without any problem.

  As means for rotating the rail member 3 d 2, an output member 29 a of an advance / retreat means 29 such as a hydraulic cylinder is connected to the rail member 3 d 2, and is provided so as to be opened and closed by the operation of the advance / retreat means 29. Further, when the rail member 3d2 is expanded, an auxiliary guide rail member 23 is disposed on the extension of the inner rail body 3a in the straight traveling direction so as to avoid the track 2, and the carriage 10 carried out as described above is displaced. It can be moved straight ahead.

  Further, in the mold insertion device 30, as in the case of the mold carry-out device 20, as shown in FIG. 9, the direction changing portion that continues from the turning movement portion CL 3 to the other rectilinear movement portion CL 2. In the (corner portion), an auxiliary track 32 extending in the straight direction from the rear in the moving direction of the straight moving portion CL2 to the portion of the straight moving portion CL2 is provided, and both end positions along the outside of the auxiliary track 32 are provided. A chain 34 is provided as a moving means that spans the sprockets 31a and 31b and reciprocates in a linear direction. The chain 34 is provided with a pair of engagement means 35, 35 such as a chuck arm that is detachable with respect to the engagement projections 17, 17 protruding from the outer edge of the carriage 10. The chain 34 is operated by engaging the engagement means 35 and 35 with the engagement protrusions 17 and 17 of the carriage 10 on which the new molding die 1 for changing the position is mounted at the rear standby position. By doing so, the new cart 10 is provided so that it can be moved straight to the portion of the rectilinear movement portion CL2 and inserted into the space portion S by the mold carry-out.

  The engaging means 35, 35 are provided so as to be movable up and down by appropriate means with respect to the base member 36 attached to the chain 34, as in the mold unloading apparatus 20 side, and are displaced in the approaching direction. It is provided so that it can be held at a position higher than the position of the engagement protrusions 17 and 17 of the carriage 10 during normal times (when not changed), and only when changing the setting, the engaging means 35 and 35 are provided. Is lowered to the height position of the engagement protrusions 17 and 17 and displaced in the approaching direction so that the engagement protrusions 17 and 17 can be sandwiched from the front and rear and held in an engaged state. It can be removed after insertion. Of course, the engaging projections 17 and 17 can be detachably provided by engaging means other than the above. Reference numeral 37 in the figure denotes a motor for driving the chain 34.

  Further, in order to enable the insertion of the carriage 10 also in the part of the mold insertion device 30, the guide rail 3 in the circuit line CL is particularly outside as in the part of the mold carry-out device 20. A part of the rail portion of the rail body 3b is constituted by a switching rail member 3d3 separated from the other main rail portion, and the rail member 3d3 is centered on a pivot shaft 38 near the rectilinearly moving portion CL2. It is provided on the outside so as to be able to expand, and by this expansion, the cart 10 can be moved straight without any problem. The means for rotating the rail member 3d3 is the same as described above, and is connected to the output member 39a of the advance / retreat means 39 such as a hydraulic cylinder, and is provided to open and close by the operation of the advance / retreat means 39. Yes. Further, when the rail member 3d3 is expanded, an auxiliary guide rail member 33 is arranged on the extension of the inner rail body 3a in the straight direction so as to avoid the track 2.

  The mold carry-out device 20 and the mold insertion device 30 are each connected to a control unit (not shown) including a computer or the like that controls the operation of the circuit line CL. Then, the control unit pre-registers with a mold number or a cart number or the like, and the registered molding die 1 to be changed or the cart 10 equipped with the molding die 1 is moved to the linear movement unit CL1. When the position of the direction changing part to the turning movement part CL3 is reached, the mold carry-out device 20 is operated by a command from the control part, and When the unloading operation is performed and the space portion S resulting from the unloading of the mold reaches the direction changing section from the turning movement section CL3 to the rectilinear movement section CL2, the mold insertion device 30 is commanded by the control section. Is set to perform an insertion operation of a new carriage 10 on which the new molding die 1 is mounted, and is configured to be connected.

  The unloading operation and the insertion operation are performed in accordance with the traveling movement of the carriage 10, and for this operation, the carriage 10 is moved to the direction changing section from the rectilinear movement section CL1 to the turning movement section CL3. A sensor for detecting the moving position is provided, and a sensor for detecting the presence or absence of the space portion S is provided in the direction changing portion from the turning moving portion CL3 to the rectilinear moving portion CL2 (both not shown). The detection signal may be input to the control unit, and a command may be issued from the control unit based on the signal.

  In the circuit line CL having the above-described configuration and apparatus, a method for changing the stage will be described together with the operation states of the respective apparatuses. In the circuit line CL, two sets of a predetermined number of molding dies 1 are mounted on the cart 10 respectively, and the required number of carts 10 are driven so as to maintain a predetermined interval by the rotation of the moving chain 4. Move and inject the foamed resin material A, mold closing process B for closing the upper mold 1a to the lower mold 1b, heating process C for heating and foaming the foamed resin material, and molding the foamed mold by opening the upper mold Each process such as mold opening for taking out (product) and product taking-out process D is sequentially passed to mold and produce a foamed resin product.

  And when changing the mold 1 for changing the type of foam resin product to be manufactured, etc., the carriage 10 carrying the mold 1 to be changed is connected to the circuit line CL. When moving to the position of the direction changing part from the linear movement part CL1 in one direction to the turning movement part CL3, that is, the position of the carry-out part for the step change, the mold carry-out device 20 is operated by a command from the control part, for example. As shown by the solid line in FIG. 2, the carriage 10 is moved straight ahead as it is without entering the rolling movement part CL <b> 3 and is carried out of the line.

  That is, the engagement means 25, 25 installed on the moving chain 24 of the mold carry-out device 20 is positioned corresponding to the carriage 10 immediately before entering the turning movement part CL3 from the rectilinear movement part CL1. Then, the engaging means 25 and 25 are engaged with the engaging protrusions 17 and 17 on the side portion of the carriage 10 which has moved as described above. At the same time, a part of the rail member 3d2 of the rail body 3b outside the guide rail 3 is expanded to allow the carriage 10 to move straight. Thus, as shown by the solid lines in FIGS. 2 and 8, the carriage 10 is moved straight on the auxiliary track 22 by the driving of the moving chain 24 and carried out to a position outside the line.

  Further, in the direction changing part from the turning movement part CL3 to the straight movement part CL2 in the other direction following the mold carrying out, the space portion S due to the carrying out of the mold goes straight from the turning movement part CL3 as shown in FIG. When the position of the direction changing part to the moving part CL2, that is, the position of the insertion part for changing the position is reached, the mold insertion device 30 is operated, for example, in accordance with a command from the control part, and the new forming mold 1 for changing the position is set. The mounted carriage 10 is moved straight from the outside of the line and inserted into the space portion S.

  That is, the engaging means 35, 35 installed on the moving chain 34 of the mold insertion device 30 are in the standby position on the auxiliary track 32 as shown in FIG. The engagement means 35 and 35 are engaged with the engagement protrusions 17 and 17 on the side portion of the carriage 10 at a position corresponding to the carriage 10 on which the vehicle 1 is mounted. And when the space part S by the said metal carrying-out reaches | attains the position of the direction change part used as the insertion part for a step change, some rail members 3d3 of the rail body 3b outside the guide rail 3 are expanded. The carriage 10 can be moved in a straight line, and the carriage 10 can be moved straight on the auxiliary track 32 outside the line toward the straight movement section CL2 by the driving of the moving chain 34 and inserted into the space portion S. To do. After this insertion, the engaging means 35, 35 release the engagement with the engaging protrusions 17, 17, and return to the original standby position.

  In this way, the molding die 1 to be changed over in the circuit line CL is taken out of the line and the new molding die 1 for changing over is inserted from the linearly moving part CL1 in the circuit line CL. The die unloading device 20 and the mold controlled in accordance with the traveling movement of the carriage 10 by using the direction changing portion to the turning movement portion CL3 and the direction changing portion from the turning movement portion CL3 to the rectilinear movement portion CL1. The operation of the mold insertion device 30 can be performed easily and automatically without stopping the operation of the line.

  Further, as in the illustrated embodiment, in the circuit line CL, at the part of the turning movement part CL3 between the mold closing process B and the heating process C, that is, continuous with the turning movement part CL3. By changing the molding die at the position of the direction changer between the linearly moving parts CL1 and CL2, the molding die 1 on the carriage 10 newly inserted by changing the die is inserted into the insert. Since it is preliminarily heated in an empty state by passing through the heating process C arranged after the linear movement part CL2 from the position, each process goes to the linear movement part CL1 side next. The next molding that passes is possible without problems.

  In the above-described embodiment, when the molding die is mounted on the carriage and each carriage is moved along the circuit line, the molding die is unloaded and inserted for each carriage. As described above, in the present invention, even when each molding die is provided so as to be moved and moved by other transfer means, as described above, the direction change from the linearly moving part in one direction of the circuit line to the turning part is performed. A mold unloading device is provided in the vicinity of the part to move the molding die subject to changeover straight without moving into the turning movement part and to carry it out of the line, and from the turning movement part to the straight movement part in the other direction. A mold insertion device is provided in the vicinity of the direction changing portion to move the molding die for changeover straight from the outside of the line and insert it into the space portion by the mold carry-out, and the mold carry-out device and the mold insertion Making the device It can be carried configured to perform the step replacement of the mold by. In practice, it is preferable to mount the molding die on the carriage and move it along the guide rail as shown in the drawing, because the changeover operation can be simplified and automated.

  The molding die changeover method and changeover device according to the present invention can be used to change molds for changing the type of foamed resin products to be produced in a circuit line for producing foamed resin products such as cushion pads for seats. It can be particularly suitably used.

1 is a schematic plan view schematically showing an outline of a circuit line in the present invention. It is a schematic explanatory drawing of the setup change method in a circuit line same as the above. In the circuit line same as the above, it is a schematic plan view showing a moving means of a carriage mounted with a molding die, a track for moving the carriage, and a guide rail. It is a one part enlarged schematic plan view of the trolley | bogie movement state on a circuit line same as the above. It is an enlarged plan view of the same trolley part. It is a side view of a part of the space | interval part of the front and back trolley | bogie. It is a front view of the trolley | bogie in a circuit line same as the above. FIG. 3 is a schematic enlarged plan view of a part of a mold carry-out device. It is a schematic enlarged plan view of a portion of a mold insertion device. It is a schematic explanatory drawing of the switching mechanism of a guide rail. It is a schematic explanatory drawing of the conventional molding die changeover method.

Explanation of symbols

CL circuit line CL1, CL2 linear movement part CL3, CL3 turning movement part A injection process B mold closing process C heating process D mold opening and product removal process S space part by mold unloading 1 molding mold 1a upper mold 1b lower mold 1c Cavity 2 Track 3 Guide rail 3a, 3b Rail body 3d2, 3d3 Switching rail member 4 Moving chain 5 Engaging member 6a, 6b, 6c, 6d Sprocket 7 Drive source 8 Transmission chain 9a Spring 9b Protrusion 10 Carriage 11 Base plate DESCRIPTION OF SYMBOLS 12 Base frame for lower mold | type 13 Base frame for upper mold | type 14 Wheel 15 Protrusion part 16 Guide roller 17, 17 Engagement protrusion 20 Mold carry-out apparatus 21a, 21b Sprocket 22 Auxiliary track 23 Auxiliary guide rail member 24 Moving means As a chain 25, 25 engaging means 26 base member 2 DESCRIPTION OF SYMBOLS 8 Pivot support part 29 Advance / retreat means 30 Mold insertion apparatus 31a, 31b Sprocket 32 Auxiliary track 33 Auxiliary guide rail member 34 Chain 35, 35 engaging means 36 base member 38 Pivot support part 39 Advance / retreat means

Claims (8)

In a circuit line for molding and manufacturing foamed resin products by moving a plurality of molding dies at predetermined intervals and sequentially passing through the steps such as injection of foamed resin material, mold closing, heating, mold opening and product removal. ,
At the time of changing the molding die, the direction changing unit from the one-way straight movement part to the turning movement part on the circuit line moves the shaping mold to be changed straight without entering the turning movement part. Unload the line, and then move the new molding die for changing the position straight from the line in the direction changing part from the turning part to the linear movement part in the other direction. A method for changing the shape of a molding die, which is inserted into a mold.   In the control unit that controls the operation of the circuit line, the molding die to be changed is pre-registered by a number or the like, and the molding die is moved from the linear movement unit to the turning movement unit to the position of the direction changing unit. When the mold is unloaded, the mold is moved straight by the operation of the mold unloading device and automatically unloaded from the line. Further, the space due to the unloading of the mold changes the direction from the turning section to the straight section. 2. The molding according to claim 1, wherein when reaching the part, the molding die for changeover is moved straight from the outside of the line by the operation of the mold insertion device and automatically inserted into the space portion. Mold changeover method.   Each molding die is mounted on a carriage, and each carriage is moved along a guide rail along the circuit line, and at the time of changing the molding die, the direction changer on the mold delivery side in the guide rail The molding die according to claim 1 or 2, wherein a part of the rail portion in the vicinity and in the vicinity of the direction changing portion on the die insertion side is switched to a straight traveling direction to carry out and insert each of the carts. How to change the stage. In a circuit line for molding and manufacturing foamed resin products by moving a plurality of molding dies at predetermined intervals and sequentially passing through the steps such as injection of foamed resin material, mold closing, heating, mold opening and product removal. ,
A mold that moves the molding die subject to changeover straight ahead without entering the turning moving part and moves it out of the line in the vicinity of the direction changing part from the linear moving part in one direction to the turning moving part of the circuit line. In addition to providing a carry-out device, a molding die for changeover is moved straight from the outside of the line in the vicinity of the direction changing part from the turning moving part to the linearly moving part in the other direction, and inserted into the space part by carrying out the mold. A molding die changing device characterized in that a molding die changing device is provided by operating the die carrying-out device and the die inserting device.   The mold unloading device and the mold insertion device are each connected to a control unit that controls the operation of the circuit line, and the molding die to be changed in advance registered in the control unit is transferred from the rectilinear movement unit to the turning When the position of the direction changing unit to the moving unit is reached, the mold unloading device is operated by a command from the control unit, and the space portion due to the mold unloading changes the direction from the turning moving unit to the straight moving unit. The molding die changeover device according to claim 4, wherein the mold insertion device is configured to operate in response to a command from the control unit when reaching the part.   Each molding die is mounted on a carriage, and each carriage is provided so as to move along a guide rail along the circuit line, and the guide rail is near the direction changing portion on the mold carry-out side and Each rail part near the direction changing part on the mold insertion side is provided so that it can be switched to the straight direction in the same row as the linear movement part, and the rail part goes straight when the mold is taken out and when the mold is inserted. 6. The molding according to claim 4, wherein the molding die is carried out and inserted for each of the carts by being switched in a direction and operated by each of the die carrying out device and the die inserting device. Mold changer.   The circuit line is continuously and annularly rotated along the line, and is engaged with a protrusion on one side of the carriage on which the molding die is mounted to push the carriage. The molding die change-over apparatus according to claim 6, wherein the molding part is provided with moving means attached at regular intervals in the longitudinal direction and configured to move each carriage in a non-connected state. The mold unloading device and the mold insertion device each include a moving means that reciprocates in a straight direction along an extension of the straight moving portion of the circuit line, and each moving means is engaged with the carriage. 8. A free engaging means is provided, and at the time of changing the stage, the carriage equipped with the molding die to be changed or the molding die for changing the stage is provided to move straight. The molding die change-over apparatus according to any one of the above.

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