JP4917816B2 - Hollow molding apparatus and mold changing method - Google Patents

Description

  The present invention relates to a hollow molding apparatus equipped with a molding die exchanging jig and a molding die exchanging method.

  The hollow molding equipment basically consists of an extruder that heats and melts a thermoplastic resin and continuously extrudes it from a die using a screw, and a closed mold that blows compressed air into the extruded parison through a blowing nozzle. A blower for expanding in the mold and a blowout device for blown hollow molded products are provided. Mold exchange in such a hollow molding apparatus includes a method using a crane, a method using an exchange carriage, and a method using a jig exchange table.

  As a method using a crane, for example, it is performed as shown in Patent Document 1. Hereinafter, this method will be described with reference to FIGS.

  When the mold 134 is replaced and hollow molding is performed using another mold 134, when the screw 148 is rotated via the motor 146, the air blowing device 128 moves from the solid line in FIG. The mold 134 moves from a position corresponding to the mold 134 to a position not corresponding to the mold 134 above the mold 134. In this state, a crane (not shown) is positioned above the mold 134, the crane and the mold 134 are connected, the mold 134 is lifted upward by the crane, and replaced with another mold. 14 and 15, reference numeral 136 denotes a crosshead, and 126 denotes a mold clamping device.

  As a method performed using a method using an exchange cart, for example, it is performed as shown in Patent Document 2. Hereinafter, this method will be described with reference to FIG.

  When the mold 208 is mounted on the table lifter 201, the expansion / contraction mechanism 201c is contracted and the common base 203 is lowered, and the mold 208 is placed on the mold conveying path 205 onto the roller 212A by a hoist or a forklift. Then, the lever 223 is rotated to raise a stopper (not shown) to prevent the metal carrier 205 from dropping. Next, the table lifter 201 is moved to the side of the pair of mold clamping platens 204, the expansion / contraction mechanism 201 c is expanded, and the rollers 212 A of the mold conveyance path 205 are attached to the pair of mold clamping platens 204. Then, when the pair of guide members 214 are brought into contact with the corresponding pair of guide members 219, the taper portions 217 and 218 come into contact with each other, and the mold conveyance path 205 is positioned in the horizontal direction. The bridging plate 206 rides on the horizontal surface of the slide collar 211 and is positioned in the height direction.

  Thus, when the roller 212B of the mold clamping platen 204 and the roller 212A of the mold conveyance path 205 are located on the same horizontal line, the mold 208 is moved from the mold conveyance path 205 into the mold clamping platen 204 by hand pressing or the like. The mold 208 is brought into contact with the mold stopper 224, and the mold 208 is fixed to the mold mounting surfaces of the pair of mold clamping platens 204, respectively.

  As a method using a jig exchange table, for example, as shown in Patent Document 3, it is performed. Hereinafter, this method will be described with reference to FIGS.

  As shown in FIGS. 17 and 18, this hollow molding apparatus has a plurality of jigs, a molding jig, and the like mounted on a jig exchange table 312 horizontally on the right side of the base 301. The pallet 313 is placed, and the pallet 313 is placed on the jig exchange table 312 in a horizontal plane in the jig exchange table main body and a transfer means for transferring the pallet 313 to a specific position where the driving device 305 can move. And a control device that moves the extrusion device 302, the mold clamping device 303, the driving device 305, and the pallet 313 for automatic replacement of the die 304, the die (not shown), the core (not shown), and the blow pin unit 311. have. The mold exchanging pallet 313c is provided with a mold placing table 349 as shown in FIG. In FIG. 18 and FIG. 19, 313a, 313b, 313c,.

  The mold mounting table 349 is configured by arranging L-shaped stoppers for fixing the four corners of the mold 304 currently fixed to the mold clamping device 303 on the pallet 313c. The mold 304 is sandwiched between both sides by the hand 345, and has holes through which the pins 348 of the hand 345 are inserted. The replacement mold placing table (not shown) is substantially the same as the mold placing table 349, in which key-shaped stoppers for fixing the four corners of the next forming mold are fixedly arranged on the pallet 313f. The mold is supported on the replacement mold stand so that it cannot be removed.

The mold clamping device 303 that holds the currently used mold 304 operates so that the mold 304 is positioned directly below the driving device 305 and stands by so that the mold 304 can be removed. When the positions of both sides of the die 304 and the hand 345 correspond, the driving device 305 descends toward the die 304, the hand 345 holds the die 304, and the pin 348 of the hand 345 is the die. , It is detected that the mold 304 has been securely gripped, and the driving device 305 lifts the mold 304 with the conveying jig 343 and moves up to the original position, and again the jig Move toward the exchange table 312. Then, the mold 304 is placed on the mold placing table 349 on the pallet 313c following the front end of the movable table located at the delivery station S. The driving device 305 stands by for the next gripping operation with the conveying jig 343 mounted in the vicinity of the jig changing table 312.
JP-A-8-258125 JP 2000-15589 A JP 7-266409 A

  However, it is necessary to use a crane or a hoist that suspends the mold when exchanging the mold when exchanging the mold using the crane and the mold exchanging table using the jig exchange table. The hanging work requires at least two persons in charge for the position control of the mold, and of course, a large transport device such as a crane or a hoist is necessary. Also, in the case of mold replacement using an exchange carriage, in a hollow molding apparatus equipped with a chucking member of a mold clamping device located on the side of the platen, the chucking member becomes a hindrance factor and the mold is placed on the mold installation side. There was a fear that the roller could not be moved laterally from the roller to the roller outside the mold installation.

  The present invention is intended to solve the problems of such a conventional hollow molding apparatus, and can easily and efficiently replace the mold, and the chucking members of the mold clamping apparatus are provided on both sides of the platen. The object is to make it easy to exchange molds even if they are located.

In order to achieve the above object, the present invention places the pair of split molds removed from the pair of platens in a state in which the pair of split molds forming the molding die are in contact with each other and carries them out in a direction perpendicular to the mold opening / closing direction. A first mold exchanging jig having a first guide roller to be inserted, and a second mold carrying the pair of split molds in and out of the first mold exchanging jig in cooperation with the first guide roller. A second mold exchanging jig provided with a guide roller is detachably provided , and the first mold exchanging jig rotatably supports the first guide roller and the pair of split molds in the mold open state. It is a hollow molding apparatus provided with a support base that is detachably disposed therebetween .

The second problem-solving means has a configuration in which a plurality of fixtures that freely engage and disengage the pair of split molds are provided on the pair of platens so as to be slidable in a direction perpendicular to the mold opening / closing direction. It is a thing.

The third problem solving means is to engage the first engaging member provided on both sides of one platen of the pair of platens and the corresponding first engaging member provided on both sides of the other platen. The mold clamping device includes a second engagement member that performs separation.

The fourth means for solving the problem is that when the molding die is unloaded, the first mold exchanging jig provided with the first guide roller is disposed between the pair of split molds forming the molding die in the mold open state, In a state where the pair of carry-out split molds are brought into contact with each other, the split molds are placed on the first guide rollers and separated from the pair of platens, and then the mold is opened, and then the pair of carry-out split molds. Is transferred onto the first guide roller and unloaded onto the second guide roller of the second mold exchanging jig arranged perpendicularly to the mold opening / closing direction and toward the outside. The pair of split molds to be loaded is transferred on the second guide roller of the second mold exchanging jig and placed on the first guide roller of the first mold exchanging jig disposed in the mold open state. The pair of split molds are locked to the pair of platens, and then the mold is opened. Te is a molding die exchange method of a blow molding apparatus to leave the first mold exchanging jigs and the second mold exchanging jig.

According to a fifth problem solving means, the hollow molding apparatus includes a first engagement member provided on both sides of one platen of the pair of platens, and a corresponding first engagement member provided on both sides of the other platen. This is a molding die replacement method for a hollow molding apparatus including a mold clamping device including a second engagement member that engages and disengages.

  The mold exchanging action by the first problem solving means is such that when the mold to be exchanged is first removed, the split molds removed from the pair of platens in a state where the pair of split molds forming the molding mold are in contact with each other. , Placed on the first guide roller of the first mold exchanging jig disposed between the pair of platens at the predetermined standby position, transferred in a direction orthogonal to the mold opening and closing direction, and further of the second mold exchanging jig The pair of split molds are transferred onto the second guide roller and carried out of the molding apparatus. On the other hand, when a new mold is mounted in the molding apparatus, the reverse of the above may be performed.

The action of the first means for solving problems also the first mold exchanging jig, it is possible to dispose the support base removably into the molding apparatus of the mold open state, the effect that the mounting jig is easy Play.

The action of the second problem solving means is that the pair of split molds placed on the first guide roller of the first mold exchanging jig can be easily locked to the platen by the slidable fixture. As a result, the split mold can be easily attached and detached.

The effect of the third problem solving means is that even if there are chucking members made of the first and second engaging members on both side surfaces of the platen, it is possible to replace the mold without being obstructed by them. Play.

The operation of the fourth problem solving means is that when the mold to be replaced is first removed, the split molds removed from the pair of platens when the molds are opened in a state where the pair of split molds forming the molding mold are in contact with each other. , Placed on the first guide roller of the first mold exchanging jig disposed between the pair of platens at the predetermined standby position, transferred in a direction orthogonal to the mold opening and closing direction, and further of the second mold exchanging jig The pair of split molds are transferred onto the second guide roller and carried out of the molding apparatus. On the other hand, when a new mold is mounted in the molding apparatus, the reverse of the above may be performed.

The effect of the fifth problem solving means is that even if there are chucking members made of the first and second engaging members on both side surfaces of the platen, it is possible to replace the mold without being obstructed by them. Play.

  As described above, the hollow molding apparatus of the present invention can easily and efficiently replace the mold, and can easily replace the mold even if the chucking members of the clamping device are located on both sides of the platen. .

  The hollow molding apparatus according to the first embodiment of the present invention includes an extruder (not shown) that melts and extrudes a resin composition as shown in FIGS. , A parison cutting device (not shown), a molding die 2, a blowing device 3, a clamping device 4, a molding die moving device 5 and the like.

  The extruder not shown includes a hopper 7 for charging the resin composition, and a screw not shown for transferring, kneading, melting, and discharging the resin composition inside the extruder.

  The die head 1 is for multiple heads as shown in FIG. 1, and is connected to the tip of an extruder. The resin composition melted in the extruder is supplied from the extruder to the die head 1 so that two cylindrical parisons P indicated by a two-dot chain line in the figure are formed.

  The parison cutting device (not shown) cuts the upper part of the cylindrical parison P that hangs down from the die head 1 and includes a cutter holder having an electric heating cutter.

  As shown in FIG. 2, the molding die 2 is composed of a pair of split molds 2a and 2b, and in order to form a hollow molded product, left and right cavities 2c and 2d into which two cylindrical parisons P are respectively inserted are formed. is doing. The molding die 2 is moved between a position immediately below the multi-head die head 1 and a position directly below the left and right blowing nozzles 8 and 8 of the blowing device 3 by a molding die moving device 5 having an accompanying die moving motor. Thus, the rail can be reciprocated alternately in the horizontal direction.

  The blowing device 3 is inserted into the cylindrical parison P and blows compressed air above the left and right cavities 2c and 2d of the molding die 2, and therefore a pair of left and right blowing nozzles 8 and 8 and these blowing A blowing nozzle driving device 9 for raising and lowering the nozzles 8 and 8 is provided. The blowing nozzle driving device 9 includes a variable speed type blowing device driving motor connected to a control unit (not shown). The blowing nozzle 8 is supplied with compressed air from an air source (not shown).

  As shown in FIG. 2, the mold clamping device 4 clamps the split molds 2 a and 2 b of the molding die 2, and a pair of horizontally extending rails arranged on the upper surface of the gantry 15 at a predetermined interval. 10, the front platen 11 and the rear platen 12 provided on the rails 10 and 10 so as to be movable at predetermined intervals, the convex engagement members 13 provided on the left and right sides of the platens 11 and 12, and the corresponding ones. A concave engagement member 14 that grips the engagement member 13, an advancing / retreating mechanism 30 that moves the front platen 11 and the rear platen 12 toward and away from each other, and an engagement / separation that drives engagement / separation of the engagement members 13, 14. A drive mechanism 40 and a mold clamping drive mechanism 50 that pulls the concave engagement member 14 holding the convex engagement member 13 together with the engagement / separation drive mechanism 40 when the mold is closed are clamped.

  The front platen 11 supports the split mold 2a in the form of a frame (frame shape) with a flat plate, and as shown in FIGS. 2, 9 and 10, on the back side of the split mold 2a. The fixed mold mounting plate 24 is fastened with four flat L-shaped fixing tools 26 and placed on the upper surface of the mounting tool 27, and the split mold 2a is detachably attached. The fixture 26 is slidable inward and outward in the groove 11a of the front platen 11, and is fixed in the groove 11a by fastening a screw 26b slidably fitted in the long hole 26a of the fixture 26. It is supposed to be.

  Similarly to the front platen 11, the rear platen 12 has a frame shape (frame shape) in which a flat plate is hollowed out, and a mold mounting plate 25 fixed to the back side of the split mold 2 b is fixed in four plane L shapes. The split mold 2b is detachably attached by being fastened by the tool 26 and placed on the upper surface of the mounting table 27. The fixture 26 is slidable outwardly in the groove 12a of the front inner platen 12, and the screw 26b slidably fitted in the elongated hole 26a of the fixture 26 is stopped to enter the groove 12a. It is designed to be fixed.

  As shown in FIG. 9, the mounting table 27 provided on the front platens 11 and 12 is formed with a tapered portion 27a for guiding the mold mounting plates 24 and 25 on the upper surface thereof. The first guide roller group on the left and right sides of one mold exchanging jig is formed by connecting a concave portion 27b to the taper portion 27a for accommodating the mold when exchanging the dies. 2, 9, and 10, reference numeral 28 denotes a guide wall for guiding the mold mounting plates 24 and 25 when the mold is exchanged. The guide wall 28 extends vertically for positioning the mold mounting plate. In addition, a tapered portion 28a is formed which is inclined outward toward the outside.

  As shown in FIG. 3, the advancing / retreating mechanism 30 includes a left / right reverse lead ball screw 31 that moves the platens 11 and 12 in synchronization with each other with respect to a predetermined parting line L of the molding die 2 and a rear side. A platen moving motor 32 located on the back side of the platen 12 and coupled to the left and right reverse lead ball screws by a coupling 33 is provided. The electric motor 32 uses a normal servo motor. The left and right reverse lead ball screw 31 that is a feed screw has a reference portion at substantially the center, a forward screw is screwed toward one end, and a reverse screw is screwed toward the other end. It is called. In FIGS. 2 and 3, reference numeral 34 denotes a cover of a left and right reverse lead ball screw.

  The flash sensor 60 is mounted at positions facing each other above the left and right side portions of the front platen 11 and above the left and right side portions of the rear platen 12, and the front platen 11 and the rear platen 12 are separated from the front split mold 2a and the rear split mold. 2b is adjusted and disposed at the surface contact position, that is, the mold closing position, and senses that the pair of split molds 2a and 2b are in normal contact.

  The mold clamping drive mechanism 50 is a ball screw 51 that is a feed screw coupled to the respective left and right concave engaging members 14 of the rear platen 12 and a brake built-in type that is positioned behind the rear platen 12 and drives the ball screw 51. And an electric motor (not shown) which is a servo motor. The mold clamping drive mechanism 50 also includes a support body 53 that is pivotally supported by a pin (not shown) sandwiching the left and right concave engagement members 14 from both sides by two steel plates, and both sides of the rear platen 12. Nuts 54 attached to the left and right support bodies 53 are provided, and a ball screw 51 is screwed to the nuts 54. Further, pulleys 55 are attached to the end portions of the ball screw 51, and a driving pulley (not shown) is wound around the endless belt 56 together with the left and right pulleys 55, and the above-described electric motor is coupled to a speed reducer (not shown). The ball screw 51 is rotatably supported by the thrust bearing 57.

  The engagement / separation drive mechanism 40 includes an air drive cylinder (not shown) attached to the support 53, and includes a first engagement arm 14a and a second engagement arm 14b that form the concave engagement member 14. The cylinder shaft of the cylinder is pivotably mounted via a link mechanism (not shown) so that the cylinder shaft can be opened and closed in accordance with the forward / backward movement of the cylinder shaft. In the mold open state shown in FIG. 2, the concave engagement member 14 is in a position where the first locking arm 14 a and the second locking arm 14 b are open to each other, and the convex engagement member 13 is opened. In this mode, the cylinder shaft moves forward in the mold closing position so that the first locking arm 14a and the second locking arm 14b are closed to each other, and the convex engagement member 13 is sandwiched. It becomes.

  As shown in FIGS. 2 and 3, the first mold exchanging jig 70 and the second mold exchanging jig 90 are attached to the mount 15 at the time of mold exchanging. As shown in FIGS. 3 to 5, the first mold exchanging jig 70 has a support base 71 provided between the pair of split molds in a mold open state, and a pair of L-shaped free sections forming the support base 71. Four left and right first guide rollers 74 and 75 are mounted on the upright plates 72a and 73a of the portions 72 and 73, respectively, so as to be rotatable. The support base 71 is slidably fitted with screw pins 77 planted at two positions on both ends in the longitudinal direction of the bottom plate 76 in long holes 72b and 73b formed at corresponding positions on the horizontal plates of the free portions 72 and 73. Then, by turning the width adjusting screw 80 of the left and right reverse leads in accordance with the mold thickness of the pair of split molds 2a and 2b, the free parts 72 and 73 are moved relative to a predetermined parting line L of the hollow molding apparatus itself. It can be moved freely.

  The support base 71 itself is a position restriction in which screw pins 20 and 21 are formed on both end portions of the bottom plate 76 so as to be planted on the support plate portions 18 and 19 projecting inwardly from the pair of longitudinal plates 16 and 17 constituting the mount 15. It is adapted to be fitted and supported in the hole 76a.

  As shown in FIGS. 2, 3, and 6 to 8, the second mold exchanging jig 90 is passed between a support base 91 attached to the gantry 15 and a pair of upright plates 92 and 93 constituting the support base 91. And a second guide roller 94 composed of a plurality of rollers supported rotatably. A plate stopper 95 is rotatably attached to the outer end of the support base 91.

  The support base 91 includes a pair of overhanging plate portions 91 a, a hanging plate portion 91 b, and a rib 91 c that supports the hanging plate portion, and the pair of overhanging plate portions 91 a are planted on the longitudinal plate 17 of the gantry 15. The two pins 22 are fitted into the insertion holes 91d, and the bolts 96 provided on the hanging plate portion 91b are applied to the side wall 23 of the mount 15 as shown in FIG. Thus, it is attached to the gantry 15 by a four-point support structure.

  The first guide roller 74 of the first mold exchanging jig 70 and the second mold exchanging jig in the state where the first mold exchanging jig 70 and the second mold exchanging jig 90 are attached to the mount 15. The second guide roller 94 of the tool 90 is on the same horizontal plane or substantially the same horizontal plane, and the mold mounting plates 24 and 25 placed on the first guide roller 74 are smoothly transferred to the second guide roller 94. In order to achieve this, the interval between rollers adjacent to each other is set to an appropriate interval. Further, the first mold exchanging jig 70 and the second mold exchanging jig 90 are always placed outside the hollow molding apparatus, and are attached to the hollow molding apparatus when the mold is replaced.

  Next, the operation of the hollow molding apparatus will be described, and a mold exchanging method will be described. First, as shown in FIG. 1, the resin is suspended from the multi-head crosshead 1 to form left and right cylindrical parisons P in the lateral direction. At this time, as shown in FIG. 2, the pair of split molds 2a and 2b are in the mold opening position, and the pair of locking arms 14a and 14b forming the concave locking member 14 are opened as shown in the illustrated example. Is in a state.

  Then, the advancing / retreating mechanism 30 is driven, that is, the motor 32 is driven and the left and right reverse lead ball screw 31 is rotated to bring the front platen 11 and the rear platen 12 close to each other toward the parting line L, and the mold is closed. . When the mold is closed, the left and right parisons P are introduced into the cavities 2c and 2d and are sandwiched between the split molds 2a and 2b.

  After the mold is closed, the engagement / separation drive mechanism 40 is driven, that is, the cylinder is pneumatically driven to feed the cylinder shaft forward, and the pair of locking arms 14a and 14b of the concave engagement member 14 are rotated in the closing direction. Then, the convex engagement member 13 is sandwiched. At this time, a slight gap is formed between the tip claw portions of the locking arms 14 a and 14 b and the tip convex portion of the convex locking member 13.

  Next, the mold clamping drive mechanism 50 is driven, that is, the motor (not shown) is driven, the speed reducer (not shown) and the drive pulley are rotated, the endless belt 56 is rotated, the pulley 55 is rotated, The ball screw 51 is rotated and the support 53 is pulled backward via the nut 54. As a result, the concave locking member 14 pivotally supported on the support 53 is pulled with the convex locking member 13 engaged, and a desired mold clamping force is generated between the split molds 2a and 2b through the platens 11 and 12.

  With the mold clamping force held, in other words, with the split molds 2a and 2b kept in pressure, the molding die moving device 5 is driven, and the compressed air blowing device from a position immediately below the multi-head crosshead 1 is driven. The mold 2 is moved together with the mold clamping device 4 so that the cavities 2c and 2d are positioned immediately below the left and right blowing nozzles 8 and 8, respectively.

  Next, compressed air is blown from the blow nozzles 8 and 8 into the respective parisons P in the cavities 2c and 2d, and these parisons are blown up to coincide with the cavities 2c and 2d of the molding die 2 to perform blow molding. A hollow molded article is formed.

  When the blowing is completed, the mold is opened by performing the operation opposite to the mold clamping described above. Thereafter, the molding die moving device 5 is driven again, and the molding die 2 is positioned directly below the multi-head crosshead 1 as shown in FIG. Thereafter, the series of steps described above is repeated.

  In such a hollow molding apparatus, when the mold is exchanged according to the product, it is performed as follows. The upright plates 72a and 73a of the pair of free portions 72 and 73 of the first mold exchanging jig 70 are positioned in accordance with the dimensions of the mold to be replaced in advance. That is, when the width adjusting screw 80 is turned, the free parts 72 and 73 are assumed to slide in the long holes 72b and 73b of the free parts 72 and 73 using the planting screw pin 77 of the bottom plate 76 as a guide. The parting line L is moved close to and away from the parting line L to match the mold width. Thereafter, the first mold exchanging jig 70 is transferred from the storage location, and as shown in the state of FIG. 2, the screw pins 20 and 21 on the gantry 15 side are fitted into the position restricting holes 76a, and the 1 mold exchanging jig 70 is set.

  Thereafter, the mold is closed using the advance / retreat mechanism 30, and the mold mounting plates 24, 25 are placed on the first guide rollers 74, 75 in a state where the split molds 2a, 2b are brought into contact with each other at the four corners. The screw 26b of the fixed fixture 26 is loosened, the screw 26b is slid toward the outside of the molding device in the long hole 26a, and the fixture 26 is shifted in the grooves 11a and 12a to the outside of the molding device, When the mold mounting plates 24 and 25 are removed from the fixture 26 and the mold is opened, the state shown in FIG. 9 is obtained.

  Next, the split molds 2a and 2b are pulled out from the first guide rollers 74 and 75 to the second guide rail 94 of the second mold exchanging jig 90, and are arranged as shown in FIG. In this state, the mold mounting plates 24 and 25 and the split molds 2a and 2b are placed on the second guide roller 94. Then, these split molds 2a and 2b are placed on a table lifter as shown in FIG. 16, for example, and moved to a storage place, and the mold mounting plates 24 and 25 are removed and stored.

  On the other hand, the attachment of a new mold to be replaced may be performed in the reverse manner to the above. That is, first, the split molds 2a and 2b of the mold to be replaced are transported on the table lifter described above, and are mounted on the second guide roller 94 of the second mold exchanging jig 90 as shown in FIG. . Then, the split molds 2 a and 2 b are pushed to roll the second guide roller 94 toward the inside of the molding apparatus, and the mold mounting plate 24 is placed on the first guide rollers 74 and 75 of the first mold exchanging jig 70. , 25 are placed in a state as shown in FIG.

  Next, the advancing / retreating mechanism 30 is driven to close the mold, and the fixtures 26 at four positions, top, bottom, left, and right, are moved toward the inside of the molding apparatus within the long holes 26a, and split with the mold mounting plate 24. Inserting the tapered tip 26c of the L-shaped fixture 26 into the recess 2e between the mold 2a and the recess 2f between the mold mounting plate 25 and the split mold 2b, and fastening the screw 26b, the mold mounting plate 24, 25 are held on the front platen 11 and the rear platen 12, respectively. At this time, the bottom surfaces of the mold mounting plates 24 and 25 are placed on the mounting table 27. When the die is opened by driving the advance / retreat mechanism 30 again, the state shown in FIG.

  Next, a second embodiment of the present invention will be described with reference to FIGS. Unlike the mold mounting plate fixture 26 in the first embodiment, this configuration is provided with the fixtures 426 at the upper and lower four corners of the front platen and the upper and lower four corners of the rear platen, and for the operation thereof. This mechanism is formed. Therefore, the same members as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted as appropriate.

  In this embodiment, as shown in FIGS. 11 to 13, a locking passage 12 b having a T-shaped cross section directed inward from a platen side wall 12 a formed in the rear platen 12 itself is provided, and a T-shaped cross section fitted in the elongated hole. A flat L-shaped fixture 426 is screwed to the fastener 427 and engaged with the platen 12 so as to be slidable in the lateral direction. The fastener 427 is slidably fitted in the elongated groove 12c extending in the lateral direction of the passage 12b connected to the central projecting slide portion 427a, and the engaging portion 427b extending in the vertical direction is inserted into the engaging passage 12b. The position can be changed by moving the Further, the fastener 427 forms a screw groove 427 c that is screwed with the screw 426 a of the fixing tool 426.

Fixture 426, elongated by loosening the tightening of the screws 426a, has a movable laterally elongated groove 12c extends with fasteners 427, the L-shaped distal end 426b and the mold mounting plate 25 and the split mold 2b The mold mounting plate 25 is fixed together with the rear platen 12 by being inserted into the recess 2f. The arrangement relationship between the fixture 426, the locking passage 12b, and the elongated groove 12c is the same in the other three corners.

  In the first and second embodiments described above, there is provided a function and a mold exchanging method for exchanging a mold using a mold exchanging jig in a combination of the mold and the mold mounting plate. As described above, in the present invention, the mold itself may be formed into an integral type incorporating the above-described mold mounting plate, and the mold may be replaced using the mold. .

  As described above, according to the present embodiment, mold replacement can be performed easily and efficiently, and even when the chucking members of the mold clamping device are located on both sides of the platen, the mold replacement can be easily performed.

The front view of the hollow molding apparatus which shows the 1st Embodiment of this invention 1 is a perspective view showing a mold clamping device and first and second mold exchanging jigs of the hollow molding apparatus shown in FIG. FIG. 2 is a plan view of a part of the mold clamping device and the first and second mold exchanging jigs shown in FIG. A perspective view showing the first mold exchanging jig Side view showing the first mold exchanging jig A perspective view showing the second mold exchanging jig Front view showing the second mold exchanging jig Side view showing the second mold exchanging jig FIG. 2 is a perspective view showing a mold clamping device and first and second mold exchanging jigs in a state different from FIG. FIG. 9 is a perspective view showing the mold clamping device and the first and second mold exchanging jigs in a state different from FIG. The perspective view which shows the fixing tool of the metal mold | die mounting plate used for the 2nd Embodiment of this invention. The front view which shows the fixing tool of FIG. FIG. 11 is a cross-sectional view showing the fixing portion of FIG. Front view showing a conventional hollow molding apparatus The side view which shows the hollow molding apparatus shown in FIG. Front view showing another conventional mold mounting apparatus for a hollow molding apparatus Front view showing other conventional hollow forming apparatus and jig replacement table The top view which shows the hollow molding apparatus and jig | tool exchange table which were shown in FIG. A front view showing a part of the jig replacement table shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 2 ... Mold 2a, 2b ... Split mold 4 ... Clamping device 11 ... Front platen 12 ... Back platen 13 ... Convex locking member 14 ... Concave locking member 24, 25 ... Mold mounting plate 26 ... Fixing tool 70 ... 1st mold exchanging jig 71 ... Support stand 74, 75 ... 1st guide roller 90 ... 2nd mold exchanging jig 94 ... 2nd guide roller

Claims (5)

A first die provided with a first guide roller for loading and unloading the pair of split molds removed from the pair of platens in a state perpendicular to the mold opening and closing direction in a state where the pair of split molds forming the molding die are abutted. A second mold exchanging jig comprising a mold exchanging jig and a second guide roller for carrying the pair of split molds in and out of the first mold exchanging jig in cooperation with the first guide roller. And the first mold exchanging jig includes a support base that rotatably supports the first guide roller and is detachably disposed between the pair of split molds in the mold open state. blow molding apparatus characterized by the. The plurality of fixtures for freely engaging and disengaging the pair of split molds on the pair of platens are provided on the pair of platens so as to be slidable in a direction perpendicular to the mold opening / closing direction . Hollow molding equipment. A first engagement member provided on both sides of one platen of the pair of platens , and a second engagement member provided on both sides of the other platen for engaging and separating with respect to the corresponding first engagement member The hollow molding apparatus according to claim 1 , further comprising: a mold clamping apparatus including: When the molding die is unloaded, the first mold exchanging jig provided with the first guide roller is disposed between the pair of split molds forming the molding die in the mold open state, and the mold is driven to close the pair. In a state where the carry-out split molds are brought into contact with each other, the respective split molds are placed on the first guide rollers to be detached from the pair of platens and driven to open the mold, and then the pair of carry-out split molds are moved over the first guide rollers. A pair of split molds that are transferred and carried out onto the second guide roller of the second mold exchanging jig arranged perpendicularly to the mold opening / closing direction and facing outward. Is transferred onto the second guide roller of the second mold exchanging jig and is carried onto the first guide roller of the first mold exchanging jig arranged in the mold open state, and the mold is driven to close. The pair of loading split molds are locked to the pair of platens, and then the mold is opened to perform the first mold exchange treatment. And molding die exchange method of a blow molding apparatus characterized by leaving the second mold exchanging jig. The hollow molding apparatus engages and disengages the first engagement members provided on both sides of one platen of the pair of platens and the corresponding first engagement members provided on both sides of the other platen. 5. The mold changing method for a hollow molding apparatus according to claim 4 , further comprising a mold clamping device including a second engagement member .

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