JPH0516275U - Mold changing device for blow molding machine - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] The most important feature of the mold changer for blow molding machines is that the mold can be efficiently changed with a simple carriage configuration. A mold changing device of a blow molding machine includes a molding position at which a blow molding operation is performed using the mold devices 14 and 16, and a discharge position at which the mold devices 14 and 16 are discharged to a corresponding standby station. And the carriage 24 on which the mold supporting members 36 and 38 constituting the mold apparatus are removably mounted, and the mold apparatus 14 at the molding position.
The mold 54 is disposed on both sides of the mold 54, and the mold 54 is clamped from both sides to fix the mold 54 at the molding position. It is provided with a pair of platens 80 to be released, and an attachment / detachment mechanism 68 that drives the platens 80 to and from the mold 54 to attach / detach the mold device to / from the blow molding machine 12.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention is a mold for a blow molding machine for replacing a mold in a blow molding machine for selectively blow molding a plurality of types of molded products by selectively using a plurality of molds. Regarding switching equipment.

[0002]

[Prior Art]

 Conventionally, in the case of blow molding a cylindrical synthetic resin product such as a plastic container, the parison extruded from the extrusion head is sandwiched between the molds of the blow molding machine and placed in this state below the mold. The air blow means including a pre-pinch device and an air nozzle is operated to introduce air into the parison. By the way, in such a blow molding machine, when it becomes necessary to replace the mold, for example, as disclosed in Japanese Patent Publication No. 56-19251, the position below the mold mounting position of the blow molding machine and the mold The dolly is moved to and from the mold loading and unloading position, and the mold removed from the molding machine is placed on this dolly and carried out, or a new mold is placed and carried in. There is. In the die loading and unloading device disclosed in this prior art publication, the die is attached to a predetermined portion of each of the inner side lower surfaces of the fixed plate and the movable plate of the die mounting part of the horizontal injection molding machine which face each other. A receiving guide for supporting and guiding a die, which is slidably received from one side, is arranged in a substantially horizontal direction in a state of protruding inward.

[0003]

[Problems to be solved by the device]

 However, in the technique disclosed in this prior art publication, as described above, the die cannot be carried in and out unless the receiving guide is provided, and it is certainly mentioned in this prior art publication as the prior art. Although it is possible to recognize the effect as compared with the one in which the mold is transferred by such a crane, it is pointed out that the trolley structure becomes complicated and the mold cannot be replaced more efficiently. Has been done. The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a mold exchanging device for a blow molding machine, which is capable of efficiently exchanging molds with a simple carriage configuration. ..

[0004]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, a mold exchanging device for a blow molding machine according to the present invention is a mold device used for a blow molding operation in a blow molding machine, which comprises a mold and a mold supporting the mold. In a mold exchanging device for exchanging a mold device including a mold supporting member having a mold supporting surface, a molding position at which a blow molding operation is executed using the mold device and a blow molding operation are performed. A trolley, which is provided so as to be movable between a used mold device and a discharge position for discharging the mold device to a standby part, on which the mold support member is taken out and placed on its own, and a mold device at the molding position. It is arranged on both sides of the mold, and by sandwiching the mold from both sides, it is fixed at the molding position, and is separated from the mold toward both sides to release it from the molding position. Platen and these Detachment means for attaching and detaching the mold device to and from the blow molding machine by driving the Latin into contact with and separating from the mold, which is provided on both side surfaces of the mold and both platens respectively facing these both side surfaces. Is disposed on the inner side surface and is supported on the mold supporting surface of the mold supporting member placed on the carriage at the molding position in accordance with the pinching operation of the platen with respect to the mold. The mold is lifted from here, and the mold supporting member placed on the carriage in the molding position is moved in accordance with the separating operation of the platen from the state of clamping the mold from both sides. It is characterized in that it is provided with an attaching / detaching means for supporting the mold on the mold supporting surface.

Further, in the mold exchanging device for a blow molding machine according to the present invention, the attaching / detaching mechanism is formed on one of both side surfaces of the die and inner side surfaces of both platens respectively facing the both side surfaces. Formed on the other of the substantially frustoconical projection having a central axis along the moving direction of the platen, and both side surfaces of the mold and the inner surfaces of both platens facing the both side surfaces, respectively. The mold is provided with a concave part that complementarily fits, and the mold is supported on the mold supporting surface by the engagement of the peripheral surfaces accompanying the fitting of the platen and the mold when the platen is clamped to the mold. It is characterized by being lifted and driven from. Further, in the mold exchanging device for a blow molding machine according to the present invention, the attaching / detaching mechanism includes a plurality of recesses formed on each side surface of the mold, and the protrusion formed on the inner side surface of each platen includes: It is characterized in that a plurality of recesses are provided corresponding to each of the plurality of recesses.

Further, in the mold exchanging device for a blow molding machine according to the present invention, the mold supporting member is provided so as to be capable of projecting upward from an upper surface of the carriage, and the mold supporting member is It is characterized by further comprising lift means for driving the cart to project upward only when the cart is in the discharge position. Further, in the mold exchanging device of the blow molding machine according to the present invention, it is characterized in that the mold supporting member is provided with auxiliaries necessary for blow molding. Further, in the mold exchanging device for a blow molding machine according to the present invention, the auxiliaries are set to a type corresponding to a type of dies supported by a die supporting member to which the auxiliaries are attached. I am trying.

[0007]

[Action]

 In the mold exchanging device of the blow molding machine configured as described above, the platen is supported on the mold supporting surface of the mold supporting member mounted on the carriage at the molding position as the platen is clamped with respect to the mold. The mold is lifted from here and the mold is supported on the mold support surface of the carriage at the molding position as the platen mold is clamped from both sides. , The die replacement operation is performed.

[0008]

【Example】

 A configuration of an embodiment of a mold exchanging device of a blow molding machine according to the present invention will be described in detail below with reference to FIGS. 1 to 10 of the accompanying drawings. As shown in FIG. 1, the mold exchanging device 10 is arranged laterally of the blow molding machine 12 and is used in the blow molding machine 12 (that is, the first mold device). It is provided to replace 14 with another mold device (that is, the second mold device) 16 when the molded product is replaced. That is, the mold exchanging device 10 is set immediately below the blow molding machine 12, and the mold device is provided for the blow molding operation in the blow molding machine 12 (the position shown by the chain line in the figure). And a stand-by position which is biased to the side of the molding position (downward in the figure) and extends to the stand-by position where the used die units 14 and 16 are made to stand by at the corresponding stand-by stations 18 and 20. The transport path 22 and a carriage 24 capable of reciprocating the exchange transport path 22 between the molding position and the standby position are provided.

As shown in the drawing, in the mold exchanging device 10, a first standby station 18 for the first mold device 14 to stand by is provided on the left side of the tip of the exchange conveyance path 22 in the figure. A second standby station 20 for the second mold device 16 to stand by is provided at a position adjacent to the blow molding machine 12 side with respect to the first standby station 18, respectively. There is. That is, in this embodiment, the standby position is the first standby position (the position shown by the solid line in the figure) for causing the first standby station 18 to wait for the first mold device 14. The second standby station 20 is provided with two positions, that is, a second standby position (a position indicated by a chain double-dashed line in the drawing) for making the second mold device 16 stand by.

Next, with reference to FIG. 2, a detailed description will be given of the configurations of the above-described exchange conveyance path 22 and the carriage 24. First, the exchange conveyance path 22 is provided with a pair of conveyance rails 26a and 26b that are parallel to each other and extend between the working position and the standby position described above. On the other hand, the carriage 24 includes a carriage main body 28, a pair of front and rear wheels 30a and 30b rotatably provided on the lower surface of the carriage main body 28 and rollingly contacting the above-mentioned transport rails 26a and 26b, respectively. The wheel 30a and the drive motor 32, which are provided to rotate and drive the wheels 30a and 30b, and a drive force transmission mechanism (not shown) that transmits the drive force of the drive motor 32 to the wheels 30a and 30b, are provided. The carriage main body 28 can reciprocate between the working position and the standby position described above through the rolling of the conveying rails 26a and 26b facing each other.

A partition wall 34 that divides the interior into upper and lower chambers is attached to the inside of the carriage main body 28, and the above-described drive motor 32 is provided in the lower chamber 28 a partitioned by the partition wall 34. Is housed in the upper chamber 28b, and base plates 36 and 38 as mold supporting members individually provided in the first and second mold apparatuses 14 and 16 (details will be described later). A lift mechanism 40 for lifting the) from the upper surface of the carriage main body 28 is housed. The lift mechanism 40 includes a pair of left and right hydraulic cylinders 42a and 42b fixed on the partition wall 34, and two piston cylinders 44a and 44b, which are vertically movable, of the hydraulic cylinders 42a and 42b. Roller support plate 46, a large number of rollers 48 rotatably supported by these roller support plates 46, respectively, and two roller support plates 46 formed on the upper surface of the carriage main body 28 as shown in FIG. It is composed of two openings 28c and 28d that can project upward.

The hydraulic cylinders 42a and 42b are controlled by a control mechanism (not shown) so that the rollers 48 supported by the roller support plate 46 respectively correspond to the openings 28c and 28d only when the carriage 24 is at the standby position. When the dolly 24 is in any other position, the roller 48 operates so as to be drawn below the upper surface of the trolley body 28. The drive is controlled to do so.

Since the lift mechanism 40 is configured as described above, when the lift mechanism 40 is in the retracted state, the roller 48 is retracted below the upper surface of the carriage main body 28, and the carriage 24 is When supporting the first mold apparatus 14, the base plate 36 corresponding to the first mold apparatus 14 is placed directly on the upper surface of the carriage main body 28, while the lift mechanism 40 is In the lifted state, the roller 48 projects above the upper surface of the carriage main body 28, and when the carriage 24 supports the first mold device 14, the first mold device The base plate 36 corresponding to 14 is placed on a large number of rollers 48, and can be moved along the left-right direction in FIGS. 1 to 3 according to the rolling of these rollers 48. . Even when the carriage 28 supports the second mold device 16, the corresponding base plate 38 is similarly lifted / placed by the lift mechanism 40. Here, when the lift mechanism 40 is in a lifted state, the lift amount of the base plates 36, 38 from the upper surface of the carriage main body 28 is set to about 2 mm. Next, with reference to FIG. 2 again, the configurations of the first and second mold devices 14 and 16 and the holding mechanism 50 that holds the mold devices 14 and 16 in the blow molding machine 12 will be described in detail. .. First, the first and second mold devices 14 and 16 have the same structure, but since both are the same, the structure of the first mold device 14 will be described as a representative, and the second mold device 14 will be described. The description of the configuration of the molding device 16 is omitted.

That is, the first mold device (hereinafter, simply referred to as a mold device) 14 has a corresponding base plate 36 and support posts 52 a that are erected in correspondence with the four corners of the base plate 36. , 52b, 52c, 52d (shown in FIG. 1), the mold 54 supported on these support posts 52a, 52b, 52c, 52d, and the auxiliary equipment mounted on the base plate 36. It is roughly configured by a pre-pinch mechanism 56 and an air blow mechanism 58 formed corresponding to the mold 54. Here, the mold 54 includes a mold body 60 having a cavity according to the outer shape of the molded product, and mounting plates 62 fixed to the left and right side surfaces of the mold body 60, respectively. And 64.

That is, the upper end surface of each of the above-mentioned support posts 52a, 52b, 52c, 52d is defined as a mold support surface, and the upper and lower ends of the lower surfaces of the mounting plates 62, 64 are respectively defined thereon. By being supported, the mold 54 is substantially supported on the base plate 36. Here, when the mold 54 is supported on the support posts 52a, 52b, 52c, 52d, when the carriage 24 is conveyed between the molding position and the standby position as the carriage 24 travels, In order to fix the support state of the mold 54 in FIG. 1, the upper end surfaces of the support posts 52a and 52d located diagonally to each other and the end portions of the lower surface of the mounting plate 62 corresponding thereto are Are clamped to each other and mechanically connected to each other. The configuration of the first clamp mechanism 66 will be described in detail later.

On the other hand, in this embodiment, the mold device 14 is composed of the base plate 36 and various parts mounted on the base plate 36, so that the base plate 36 is mounted on the carriage 24. The mold 54 of the mold device 14 is mounted on the blow molding machine 12 in the state where the mold 54 is placed and in the molding position, and is subjected to the blow molding operation. When the mold 54 is incorporated into the blow molding machine 12, it will be described later from the state where the mold 54 is supported by the mold supporting surfaces of the four support posts 52a, 52b, 52c and 52d. When the supporting state is released via the attaching / detaching mechanism 68, the supporting posts 52a, 52b, 52c, 52d are separated from each other, and are separated from the mold supporting surface by a predetermined distance. It is lifted and installed in the blow molding machine 12 in an independent state.

Further, when the first mold device 14 incorporated in the blow molding machine 12 is replaced with the second mold device 16 waiting in the second waiting station 20, The assembly state of the mold 54 is released from the blow molding machine 12 via the attaching / detaching mechanism 68, and is supported on the mold supporting surfaces of the four support posts 52a, 52b, 52c, 52d, and the mold 54 And the base plate 36 are integrated. From this state, by moving the carriage 24 from the molding position to the first standby position, the first mold device 14 is detached from the blow molding machine 12. The exchange operation of such a mold device will be described later in detail.

Next, the structure of the attachment / detachment mechanism 68 of the mold 54 in the blow molding machine 12 will be described in detail. That is, the attachment / detachment mechanism 68 is positioned on both sides of the molding position, and a pair of fixed bases 72 erected on the floor 70 and upper and lower attached to the inner surfaces of the fixed bases 72 facing each other. A pair of hydraulic cylinders 74, a piston rod 76 attached to each of the hydraulic cylinders 74 so as to be capable of projecting inward from each other, and an attachment block attached to the tips of the upper and lower two piston rods 76 on each side. And 78. The platens 80 constituting the holding mechanism 50 are attached to the inner side surfaces of the attachment blocks 78 that face each other. Here, the inner side surface of each platen 80 and the outer side surfaces of the mounting plates 64 located between them and attached to both sides of the mold 54 face each other and contact each other. It is accessible.

Then, on the inner side surfaces of the platens 80 facing each other, positioning pins 82 are formed as truncated-cone-shaped truncated cone-shaped projections having central axes extending horizontally toward each other. , The upper and lower parts are integrally formed in a state of being spaced apart from each other and arranged side by side, and the positioning pins 82 formed on the platen 80 opposed thereto are complementarily fitted to the outer surface of each mounting plate 64. Positioning holes 84 as concave portions are formed in a state where three positioning holes 84 are vertically arranged side by side. Here, each positioning pin 82 is formed in a truncated cone shape which tapers toward the center of each other.

In the attachment / detachment mechanism 68 thus configured, when the mold 54 is detached from the blow molding machine 12, each hydraulic cylinder 74 pulls in each piston rod 76 in the state shown in FIG. .. As a result, the molds 54 are sandwiched from both sides, and the platens 80 located on both sides of the mold 54 attached to the blow molding machine 12 are moved in the directions away from each other. During this movement of each platen 80, each positioning pin 82 is pulled out from the corresponding positioning hole 84, and the inclined circumferential surface of the positioning hole 84 provided on the mold 54 side is inclined from this positioning pin 82. At least immediately before the positioning pin 82 is completely displaced from the positioning hole 84, the lower end surfaces of the two mounting plates 62, 64 forming the mold 54 have their respective lower ends at both ends. It will be supported by the mold supporting surface defined by the upper surfaces of the corresponding support posts 52a, 52b, 52c, 52d. Then, as shown in FIG. 4, when the positioning pin 82 is completely removed from the corresponding positioning hole 84, the first mold device 14 having this mold 54 is detachable from the blow molding machine 12. It becomes a state.

On the other hand, when the mold 54 is attached to the blow molding machine 12, the state shown in FIG. 4, that is, the first mold device 14 placed on the carriage 24 is conveyed to the molding position. In the coming state, each hydraulic cylinder 74 causes each piston rod 76 to project. As a result, the platens 80, which are spaced apart from each other on both sides of the mold 54, are moved toward each other. In this movement of each platen 80, each positioning pin 82 is fitted into the corresponding positioning hole 84, and the inclined circumferential surface of the positioning hole 84 is inclined to the positioning pin 82 fitted therein. It is biased upward along the circumferential surface, and the positioning pin 82 is completely fitted into the positioning hole 84. At least immediately before, the lower end surfaces of the two mounting plates 62, 64 forming the mold 54 correspond to each other at both ends. The support posts 52a, 52b, 52c, and 52d are lifted from the mold support surface defined by the upper surfaces of the support posts 52a, 52b, 52c, and 52d and separated upward. In this way, the mold 54 is clamped on both sides by the platen 80 while being lifted from the mold supporting surfaces of the support posts 52a, 52b, 52c, 52d, and is held in the molding position.

In order to fix the platen 80 and both side surfaces of the mold 54 in a state of being sandwiched by the platens 80, the front and rear end edges of each platen 80 are vertically separated from each other. In this state, the second clamp mechanism 86 is provided. That is, when the platen 80 located on the right side in FIG. 2 is viewed from the front, the second clamp mechanism 86 has, as shown in FIG. Each platen 80, in other words, is provided in total for each platen 80. Since the second clamp mechanisms 86 have the same configuration, the description will be given with the second clamp mechanism 86 at the lower right in FIG. 5 taken out, and the configuration of the other second clamp mechanism 86. Is omitted.

Here, as shown in FIGS. 6 to 8, the second clamp mechanism 86 has the right side in FIG. 5 on the left side surface in FIG. 2 of the platen 80 located on the right side in FIG. It is formed in a state in which a key groove 88 extending along the horizontal direction is opened in a state limited to a part. As shown in FIGS. 6 and 7, the key groove 88 is opened at the front end surface of the platen 80 in FIG. 2, and as shown in FIG. 8, is opened at the left side surface of the platen 80 in FIG. The narrow portion 88a and the wide portion 88b communicating with the inner side of the narrow portion 88a. On the other hand, as is clear from FIG. 8, a communication groove 90 is formed in the mounting plate 64 in a state of communicating with the narrow portion 88a of the key groove 88. The communication groove 90 also opens on the front end surface of the mounting plate 64 in FIG. As is clear from FIGS. 6 and 7, the right side surface of the mounting plate 64 in the figure (that is, the front end surface in FIG. 2) is biased to the left side in the figure rather than the right side surface of the platen 80 in the figure. It ends in the state. In other words, both sides of the mounting plate 64 are offset inwardly by a predetermined distance from both sides of the corresponding platen 80.

On the other hand, as shown in FIG. 6, a first pneumatic cylinder 94 is attached to the end face of the platen 80 on the front side in FIG. 2 via a stay 92, and this first pneumatic cylinder 94 is attached. A clamp member 98, which is located in the wide portion 88b of the key groove 88 and is movable along the wide portion 88b of the key groove 88, is attached to the tip of the first piston rod 96 of 94. A distal end portion of a second piston rod 100 that penetrates the narrow portion 88a of the key groove 88 and projects outward is connected to the clamp member 98, and the base end portion of the second piston rod 100 is , Is accommodated in the second pneumatic cylinder 102. Here, the second piston rod 100 can be inserted into the communication groove 90 formed in the mounting plate 64, and the inner end surface of the second pneumatic cylinder 102 is located on the outer surface of the mounting plate 64. Engageable.

Since the second clamp mechanism 86 is configured in this manner, the first pneumatic cylinder 94 pushes out the corresponding first piston rod 96 to drive the clamp member 98 into the key groove 88. 6, the inner end surface of the second pneumatic cylinder 102 can be engaged with the outer surface of the mounting plate 64, as shown in FIG. From this state, when the second pneumatic cylinder 102 pulls in and drives the corresponding second piston rod 100, the clamp member 98 connected to the tip of the second piston rod 100 pulls in the platen 80, and as a result, the platen 80 of this platen 80 is pulled. The mounting plate 64 is firmly sandwiched between the outer side surface and the inner end surface of the second pneumatic cylinder 102, and the so-called second clamped state by the platen 80 of the mold 54 is achieved.

On the other hand, the second pneumatic cylinder 102 pushes and drives the corresponding second piston rod 100 to drive the outer surface of the platen 80 of the mounting plate 64 and the inner end surface of the second pneumatic cylinder 102. The pinched state between the two is released. From this state, the first pneumatic cylinder 94 pulls in and drives the corresponding first piston rod, whereby the clamp member 98 and the second pneumatic cylinder 102 connected thereto are moved to the front side. Will be done. As a result, the second piston rod 100 is taken out from the communication groove 90 formed in the mounting plate 64, as shown by the one-dot chain line in FIG. 6, and the mounting plate 64 can be separated from the platen 80. That is, in this manner, the so-called second unclamping state of the mold 54 to the platen 80 is achieved. Next, in order to fix the supporting state of the first clamp mechanism 66, that is, the mold 54 during conveyance, the upper ends of the support posts 52a and 52d located diagonally to each other and the upper ends of these support posts 52a and 52d are fixed. The structure of the first clamp mechanism 66 for clamping and mechanically connecting the ends of the lower surface of the corresponding mounting plate 62 to each other will be described with reference to FIGS. 9 and 10.

Here, the first clamp mechanism 66 has the same structure for the support post 52a and the support post 52d, and therefore, in the following description, the first clamp mechanism 66 for the support post 52a will be described. The configuration will be described and the description of the configuration for the support post 52d will be omitted. That is, as shown in FIG. 9, the first clamp mechanism 66 includes the engagement block 104 which can be brought into contact with the upper surface of the corresponding support post 52a, that is, the mold support surface from above in the mounting plate 62. It is equipped integrally with the lower part of the side surface. The engaging block 104 is formed with a clamp hole 106 penetrating along the direction orthogonal to the paper surface of FIG. On the other hand, as shown in FIG. 9, a third pneumatic cylinder 110 is attached to the upper end of the support post 52a via a stay 108, and the third pneumatic cylinder 110 has a third pneumatic cylinder 110 attached thereto. The piston rod 112 is attached so as to be able to move back and forth, and the tip of the third piston rod 112 is attached to the engaging block 104 when the engaging block 104 is placed on the die supporting surface of the corresponding supporting post 52a. The so-called clamp pin is provided so that it can be inserted into the clamp hole 106 formed in the.

Since the first clamp mechanism 66 is configured in this way, as shown in FIG. 9, the mold 54 is lowered as the mold 54 is removed by the above-described attachment / detachment mechanism 68. When the engagement block 104 formed on the mounting plate 62 is placed on the mold supporting surface of the corresponding support post 52a, the third pneumatic cylinder 110 pushes out and drives the corresponding third piston rod 112. .. As a result, the clamp pin defined from the tip of the third piston rod 112 fits into the corresponding clamp hole 106, as shown in FIG. 10, and in this manner, the support post 52a and its corresponding post. The engagement block 104 is mechanically connected, and as a result, a so-called first clamped state between the support post 52a and the mold 54 is achieved.

On the other hand, from the first clamped state shown in FIG. 10, the third pneumatic cylinder 110 pulls in and drives the corresponding third piston rod 112, whereby the crank pin is pulled out from the corresponding clamp hole 106. In this way, the mechanical connection between the support post 52a and the corresponding engagement block 104 is released, and as a result, the so-called first unclamp between the support post 52a and the mold 54 is performed. The state is achieved.

Next, returning to FIG. 1, the first and second standby stations 18 and 20 are transported to the corresponding first and second standby positions along with the movement of the carriage 24. Or, the construction of the pull-in drive mechanism 114 for pulling-in and driving the second mold devices 14 and 16 to the corresponding standby stations 18 and 20 will be described. Since the pull-in drive mechanism 114 has the same construction as the first and second standby stations 18 and 20, the configuration of the pull-in drive mechanism 114 in the first standby station 18 will be described below. The description of the configuration of the pull-in drive mechanism in the standby station 20 will be omitted.

That is, the pull-in drive mechanism 114 is disposed on the side far from the exchange conveyance path 22, and is connected to the exchange conveyance path 22 along with the drive sprocket 116 which is rotationally driven around the vertical axis by a drive motor (not shown). A driven sprocket 118 which is disposed on the near side and is rotatable about a vertical axis, a chain 120 which is endlessly wound between the drive sprocket 116 and the driven sprocket 118, and a part of the chain 120. The locking pin 122 fixed in an upright state and the corresponding locking plate 122 extends from one side edge of the base plate 36 of the corresponding first mold device 14 on the side of the first standby station 18 toward the first standby station 18. As described above, it is integrally formed, and is formed of a locking plate 124 to which the above-described locking pin 122 is locked.

Here, the locking plate 124 is formed with a substantially inverted L-shaped locking groove 126 into which the above-mentioned locking pin 122 is locked. That is, the locking groove 126 is fitted at the time when the locking pin 122 moves to the right in the drawing and passes the side of the driven sprocket 118, and when it goes around the driven sprocket 118, the locking groove 126 is deeply inserted. With the movement to the left in the figure, it is formed so as to be integrally pulled in while being locked to the locking plate 124. In other words, the first mold device 14 in the first standby position is retracted together with the base plate 36 onto the first standby station 18 in accordance with this retracting operation.

On the other hand, when the locking pin 122 is driven to move in the opposite direction, the releasing operation is executed in the opposite manner to the above-described operation, and the first mold on the first standby station 18 is executed. The device 14 is pushed out to the first standby position, and when the first mold device 14 is brought to the first standby position, the locking pin 122 passes around the driven sprocket 118. Then, it is taken out from the locking groove 126 and independently moved to the left in the drawing. That is, the first mold device 14 on the first standby station 18 is pushed out to the first standby position together with the base plate 36 in accordance with this pushing operation.

The mold exchanging operation in the mold exchanging apparatus 10 configured as described above will be described below. In the following description, the operation of replacing the first mold device 14 installed in the blow molding machine 12 with the second mold device 16 in the second standby station 20 will be described. The operation of replacing the second mold device 16 mounted on the blow molding machine 12 with the first mold device 14 at the first standby station 18 is also similarly performed.

First, when this mold exchanging operation is started, the second clamp mechanism 86 is first started from the state shown in FIG. 2, and the mounting corresponding to the platen 80 in the first mold device 14 is performed. A second unclamped state is brought between the plates 62 and 64. After that, in the attachment / detachment mechanism 68, the hydraulic cylinder 74 pulls in and drives the corresponding piston rod 76, and the platen 80 is separated from the state in which the mold 54 is clamped from both sides. As a result, the fitting state of the positioning pin 82 and the positioning hole 84 is released, the mold 54 in the first mold device 14 falls, and the lower surfaces of the mounting plates 62, 64 constituting the mold 54 are The mold support surface defined by the upper surfaces of the four support posts 52a, 52b, 52c, 52d comes into contact with the mold support surface from above and is supported there. In this state, the mold 54 is separated from the blow molding machine 12 in an independent state, and is integrated with the corresponding base plate 36.

Thereafter, the first clamp mechanism 66 is activated to bring both the mounting plates 62 and 64 of the mold 54 and the corresponding support posts 52a and 52d into the first clamp state, and the carriage 24 travels. Even so, the mold 54 is held in a stable state on the four support posts 52a, 52b, 52c and 52d. When the clamping operation of the first clamp mechanism 66 is completed, the carriage 24 is driven to travel from the molding position to the first standby position and stopped at the first standby position. In this state, the lift mechanism 40 is activated to lift the rollers 48 and lift the base plate 36 from the upper surface of the carriage main body 28 so that the rollers 48 are supported by the rollers 48. By the lift operation of the lift mechanism 40, the first mold device 14 is moved together with the base plate 36.

Thereafter, the retracting mechanism 114 in the first standby station 18 is activated to drive the first mold device 14 in the first standby position together with the base plate 36 to drive the first standby station 18. Bring on 18. In this way, first, the standby operation for the corresponding first standby station 18 of the first mold device 14 is completed. Then, the carriage 24 travels from the first standby position to the second standby position, and stops at this second standby position. In this state, the retracting mechanism 114 in the second standby station 20 is activated, and the second mold device 16 standing by here is pushed and driven together with the base plate 38 onto the carriage 24. In this way, the second mold unit 16 is brought onto the carriage 24 while being supported by the rollers 48. From this state, the lift mechanism 40 is activated in the opposite direction, the roller 48 is moved downward, and the base plate 38 is placed on the upper surface of the carriage main body 28.

In the second mold device 16, the first clamp mechanism 66 has already been activated to correspond to both the mounting plates 62 and 64 of the mold 54 in the second mold device 16. With the support posts 52a, 52d in the first clamped state, the mold 54 is held in a stable state on the four support posts 52a, 52b, 52c, 52d even when the carriage 24 travels. Has been done. Therefore, when the second mold device 16 is brought onto the carriage 24 in the second standby position, the carriage 24 travels from the second standby position to the molding position and stops at this molding position. In this state, the first clamp mechanism 66 is activated, and both the mounting plates 62 and 64 of the mold 54 in the second mold device 16 and the corresponding support posts 52a and 52d are unclamped. State.

After that, in the attachment / detachment mechanism 68, the hydraulic cylinder 74 pushes out the corresponding piston rod 76, and the platen 80 holds the mold 54 from both sides. As a result, the positioning pins 82 are fitted into the corresponding positioning holes 84, and the lower surfaces of the mounting plates 62 and 64 that form the mold 54 in the second mold device 16 have four support posts 52a and 52b. , 52c, 52d are lifted upward from above the mold supporting surface defined by the upper surfaces of the molds 52c, 52d, and separated from these in an independent state. In this state, the mold 54 in the second mold device 16 is mounted on the blow molding machine 12. After this, the second clamp mechanism 86 is activated in the opposite direction to bring the space between the platen 80 and the corresponding mounting plates 62, 64 in the second mold apparatus 16 into the second clamp state. As a result, the platen 80 and the mold 54 in the second mold device 16 are mechanically connected to each other, and the second mold device 16 is integrally mounted on the blow molding machine 12.

In this way, the mold device mounted on the blow molding machine 12 is exchanged from the first mold device 14 to the second mold device 16. As described above in detail, in this embodiment, by using the dolly 24 having an extremely simple structure, the mold device can be efficiently replaced from the blow molding machine 12, and it is also necessary for the replacement. The time can be shortened to an extremely short time. Needless to say, the present invention is not limited to the configuration of the above-described embodiment and can be variously modified without departing from the gist of the present invention.

[0041]

[Effect of the device]

 As described above in detail, the mold exchanging device of the blow molding machine according to the present invention is a mold device used for the blow molding operation in the blow molding machine, and includes a mold and a mold supporting the mold. In a mold exchanging device for exchanging a mold device composed of a mold supporting member having a supporting surface, a mold position at which a blow molding operation is executed using the mold device, and a mold position used for the blow molding operation. A dolly provided so as to be movable between an ejecting position for ejecting the mold device to the standby part, and on which the mold supporting member is removably placed, and a mold for the mold device in the molding position. A pair of platens that are placed on both sides of the mold and fix the mold from both sides by clamping it from both sides and release it from the mold position by separating from this mold toward both sides. And these platens An attaching / detaching means for attaching / detaching the die device to / from the blow molding machine by driving the die device into and out of the die mold, wherein both side surfaces of the die and inner side surfaces of both platens respectively facing the both side surfaces are provided. And a die supported on the die supporting surface of the die supporting member placed on the carriage in the forming position in accordance with the clamping operation of the platen with respect to the die. The mold supporting surface of the mold supporting member placed on the carriage at the molding position is lifted up from here and with the separating operation of the platen from the state of clamping the mold from both sides. It is characterized in that it further comprises an attaching / detaching means for supporting the die.

Further, in the mold exchanging device of the blow molding machine according to the present invention, the attaching / detaching mechanism is formed on one of both side surfaces of the mold and inner side surfaces of both platens respectively facing the both side surfaces. Formed on the other of the substantially frustoconical projection having a central axis along the moving direction of the platen, and both side surfaces of the mold and the inner surfaces of both platens facing the both side surfaces, respectively. The mold is provided with a concave part that complementarily fits, and the mold is supported on the mold supporting surface by the engagement of the peripheral surfaces accompanying the fitting of the platen and the mold when the platen is clamped to the mold. It is characterized by being lifted and driven from. Further, in the mold exchanging device for a blow molding machine according to the present invention, the attaching / detaching mechanism includes a plurality of recesses formed on each side surface of the mold, and the protrusion formed on the inner side surface of each platen includes: It is characterized in that a plurality of recesses are provided corresponding to each of the plurality of recesses.

Further, in the mold exchanging device of the blow molding machine according to the present invention, the mold supporting member is provided so as to be able to project upward from the upper surface of the carriage, and the mold supporting member is It is characterized by further comprising lift means for driving the cart to project upward only when the cart is in the discharge position. Further, in the mold exchanging device of the blow molding machine according to the present invention, it is characterized in that the mold supporting member is provided with auxiliaries necessary for blow molding. Further, in the mold exchanging device for a blow molding machine according to the present invention, the auxiliaries are set to a type corresponding to a type of dies supported by a die supporting member to which the auxiliaries are attached. I am trying. Therefore, according to the present invention, it is possible to provide a mold exchanging device for a blow molding machine, which is capable of efficiently exchanging the mold device with a simple carriage configuration.

[Brief description of drawings]

FIG. 1 is a top view schematically showing the configuration of an embodiment of a mold exchanging device for a blow molding machine according to the present invention.

FIG. 2 is a front view showing the configuration of the mold exchanging device shown in FIG. 1 together with a mechanism for attaching / detaching a mold to / from a blow molding machine.

FIG. 3 is a top view showing a top structure of the truck shown in FIG.

FIG. 4 is a front view showing the attachment / detachment mechanism shown in FIG. 1 in a state where the mold is released from the blow molding machine.

5 is a left side view showing a side surface state of the right platen shown in FIG. 2. FIG.

FIG. 6 is a plan cross-sectional view showing a configuration of a second clamp mechanism in an extracted manner.

FIG. 7 is a vertical side view showing a configuration of a second clamp mechanism taken out.

FIG. 8 is a front cross-sectional view showing the configuration of a second crank mechanism by taking it out.

FIG. 9 is a side view showing the configuration of the first clamp mechanism in a first clamped state.

FIG. 10 is a side view showing the configuration of the first clamp mechanism in a first unclamped state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Mold changing device, 12 Blow molding machine, 14 1st mold device, 16 2nd mold device, 18 1st stand-by station, 20 2nd stand-by station, 22 Exchange conveyance path, 24 vehicles, 26a 26b transport rail, 28 carriage main body, 28a; 28b room, 28c; 28d opening, 30a; 30b wheel, 32 drive motor, 34 partition wall, 36; 38 base plate, 40 lift mechanism, 42a; 42b hydraulic cylinder, 44a; 44b Piston rod, 46 roller support plate, 48 roller, 50 holding mechanism, 52a; 52b; 52c; 52d support post, 54 mold, 56 pre-pinch mechanism, 58 air blow mechanism, 60 mold body, 62; 64 mounting plate, 66th 1 clamp mechanism, 68 attachment / detachment mechanism, 70 floor, 72 Fixed table, 74 hydraulic cylinder, 76 piston rod, 78 mounting block, 80 platen, 82 positioning pin, 84 positioning hole, 86 2nd clamp mechanism, 88 key groove, 90 communicating groove, 92 stay, 94 1st pneumatic cylinder , 96 first piston rod, 98 clamp member, 100 second piston rod, 102 second pneumatic cylinder, 104 engaging block, 106 clamp hole, 108 stay, 110 third pneumatic cylinder, 112 third piston rod 114 drive mechanism, 116 drive sprocket, 118 driven sprocket, 120 chain, 122 locking pin, 124 locking plate, 126 locking groove.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hirochigu Hisamitsu 3-1, Shinchi, Fuchu-cho, Aki-gun, Hiroshima Prefecture Mazda Motor Corporation

Claims (6)

[Scope of utility model registration request] 1. A mold apparatus used for blow molding operation in a blow molding machine, comprising a mold and a mold supporting member having a mold supporting surface for supporting the mold. In a mold exchanging device for exchanging a mold, between a molding position where a blow molding operation is performed using the mold device and a discharge position where the mold device used for the blow molding operation is discharged to a standby unit. And a carriage on which the mold support member is removably mounted, and arranged on both sides of the mold of the mold device in the molding position,
By sandwiching this mold from both sides, it is fixed at this molding position, and by separating from this mold toward both sides, a pair of platens is released from this molding position, and these platens are said molds. An attaching / detaching means for attaching / detaching the mold device to / from the blow molding machine by arranging the mold device on the both side surfaces of the mold and the inner side surfaces of both platens respectively facing the both side surfaces. From here, the mold supported on the mold supporting surface of the mold supporting member placed on the carriage at the molding position is provided along with the clamping operation of the platen with respect to the mold. As well as lifting
Along with the separating operation from the state where the platen holds the mold from both sides, the mold is mounted on the mold supporting surface of the mold supporting member placed on the carriage at the molding position. A mold exchanging device for a blow molding machine, comprising: an attaching / detaching means for supporting. 2. The attachment / detachment mechanism is formed on one of both side surfaces of the mold and inner side surfaces of both platens respectively facing the both side surfaces, and has a substantially truncated shape having a central axis line along a moving direction of the platen. A truncated cone-shaped protrusion, and a recess formed on the other side of the mold and the inner side of both platens facing each side of the mold and complementary to the protrusion, The mold is lifted from the mold support surface and driven by the engagement of the peripheral surfaces of the platen during the clamping operation of the platen with respect to the mold due to the fitting of the both.
The mold changing device of the blow molding machine according to 1. 3. The attachment / detachment mechanism includes a plurality of recesses formed on each side surface of the mold, and a plurality of protrusions formed on an inner side surface of each platen respectively corresponding to the plurality of recesses. The mold changing device of the blow molding machine according to claim 2, wherein 4. The mold supporting member is provided so as to be able to project upward from the upper surface of the carriage, and the mold supporting member is projected upward only when the carriage is at the discharge position. The mold exchanging device for a blow molding machine according to claim 1, further comprising lift means for driving the blow molding machine. 5. The mold exchanging device for a blow molding machine according to claim 1, wherein auxiliaries necessary for blow molding are provided on the mold supporting member. 6. The blow molding machine according to claim 5, wherein the auxiliaries are set to a type corresponding to a type of a die supported by a die supporting member to which the auxiliaries are attached. Mold changing device.