JP2550909Y2 - Mold changing device of blow molding machine - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method for exchanging dies in a blow molding machine for selectively blow-molding a plurality of types of molded products by selectively using a plurality of types of dies. The present invention relates to a mold changing device for a blow molding machine.

[0002]

2. Description of the Related Art Conventionally, when blow molding a cylindrical synthetic resin product such as a plastic container, a parison extruded from an extrusion head is sandwiched by a mold of a blow molding machine. Air blow means including a pre-pinch device, an air nozzle and the like arranged below is operated to introduce air into the above-mentioned parison. By the way, in such a blow molding machine, when it is necessary to replace the mold, for example,
As disclosed in Japanese Patent Publication No. 56-19251, a bogie is moved between a position below a die mounting position of a blow molding machine and a die loading / unloading position, and the die removed from the molding machine is placed on the bogie. The loading and unloading and the loading and loading of a new mold are performed. In the mold loading / unloading device disclosed in this conventional publication, the die is placed at a predetermined position on the lower side of each of the inner surfaces of the fixed plate and the movable plate of the die mounting portion in the horizontal injection molding machine. The receiving guide for supporting and guiding the mold, which can be slidably received from the other side, is arranged along the substantially horizontal direction with the receiving guide protruding inward.

[0003]

However, in the technology disclosed in this conventional publication, as described above,
Unless a receiving guide is provided, the mold cannot be carried in and out, and indeed, compared with the conventional technique in which the mold is transferred by a crane or the like as described in the related art as a conventional technique, the effect is reduced. I can admit,
It has been pointed out that the configuration of the truck becomes complicated and the mold cannot be replaced more efficiently. The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a mold changing device of a blow molding machine capable of efficiently changing a mold with a simple bogie configuration. .

[0004]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, a mold changing device of a blow molding machine according to the present invention is a mold device used for a blow molding operation in a blow molding machine. In a mold exchanging apparatus for exchanging a mold apparatus composed of a mold supporting member having a mold supporting surface for supporting the mold, a blow molding operation is performed using the mold apparatus. And a trolley on which the mold supporting member is removably mounted, between a molding position and a discharge position for discharging the mold device used for the blow molding operation to a standby portion. It is arranged on both sides of the mold of the mold device at the molding position, and by clamping this mold from both sides, it is fixed at the molding position and separated from this mold toward both sides. Release from the molding position A platen, and detaching means for driving the platen toward and away from the mold so as to attach and detach a mold device to and from the blow molding machine, wherein both side surfaces of the mold and the both side surfaces are respectively provided. On the mold supporting surface of the mold supporting member disposed on the inner side surfaces of the opposed platens and the mold supporting member placed on the carriage at the molding position in accordance with the clamping operation of the platen with respect to the mold. With the mold supported by the platen lifted up from here, and with the separating operation of the platen from the state of clamping the mold from both sides,
On the mold supporting surface of the mold supporting member placed on the carriage at the molding position, there is provided a detachable means for supporting the mold.

In the die changing apparatus for a blow molding machine according to the present invention, the attachment / detachment mechanism is formed on one of both side surfaces of the mold and inner side surfaces of both platens opposed to the both side surfaces, respectively. A substantially frustoconical protrusion having a central axis along the direction of movement of the platen, and both sides of the mold and the other side of the inner surfaces of both platens opposed to the both sides, respectively. A concave portion that complementarily fits into the portion, and the die is lifted from the die support surface by engagement between the peripheral surfaces accompanying the fitting of the platen with the die during the clamping operation of the die. It is characterized by being driven. Further, in the mold changing device of the blow molding machine according to the present invention, the attachment / detachment mechanism includes a plurality of recesses formed on each side surface of the mold, and a protrusion formed on an inner surface of each platen includes: A plurality of recesses are provided corresponding to the plurality of recesses, respectively.

In the die changing apparatus for a blow molding machine according to the present invention, the die supporting member is provided so as to be able to protrude upward from an upper surface of the bogie, and the die supporting member is connected to the bogie. Is further provided with a lift means for driving it to protrude upward only when it is at the discharge position. Further, in the mold changing apparatus for a blow molding machine according to the present invention, auxiliary equipment necessary for blow molding is provided on the mold support member. Further, in the mold changing device for a blow molding machine according to the present invention, the auxiliary devices are set to a type corresponding to a type of a mold supported by a mold supporting member to which the auxiliary device is attached. And

[0007]

In the mold exchanging device of the blow molding machine configured as described above, the mold supporting surface of the mold supporting member placed on the bogie at the molding position accompanying the clamping operation of the platen to the mold. The mold supported above is lifted from here, and the mold is supported on the mold support surface of the bogie at the molding position with the separating operation from the state where the mold of the platen is sandwiched from both sides. In this manner, the mold exchanging operation is performed.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a mold changing apparatus of a blow molding machine according to an embodiment of the present invention; FIG. As shown in FIG. 1, the mold changing apparatus 10 is disposed beside the blow molding machine 12, and a mold apparatus (that is, a first mold apparatus) 14 used in the blow molding machine 12. Is exchanged with another mold device (that is, a second mold device) 16 in accordance with the exchange of the molded product. That is, this mold changing apparatus 1
0 is set immediately below the blow molding machine 12, and a molding position (a position indicated by a dashed line in the figure) at which the mold apparatus is provided for the blow molding operation by the blow molding machine 12, and a side of the molding position. (Downward in the figure), and the used mold device 1
An exchange transport path 22 extending between standby positions for causing the standby stations 18 and 20 to wait at corresponding standby stations 18 and 20
And a carriage 24 that can reciprocate along the exchange conveying path 22 between a molding position and a standby position.

As shown in the figure, the mold exchanging apparatus 10 has a first standby station 18 for waiting the first mold apparatus 14 on the left side of the tip of the exchange conveying path 22 in the figure. A second standby station 20 for the second mold apparatus 16 to wait at a position adjacent to the first standby station 18 on the blow molding machine 12 side.
Are arranged respectively. That is, in this embodiment, the standby positions include a first standby position (a position indicated by a solid line in the drawing) for causing the first mold device 14 to wait on the first standby station 18. The second standby station 20 has two positions, that is, a second standby position (a position indicated by a two-dot chain line in the figure) for allowing the second mold device 16 to standby.

Next, with reference to FIG. 2, the configuration of the exchange transport path 22 and the carriage 24 will be described in detail. First, the exchange transport path 22 includes a pair of parallel transport rails 26 extending between the above-described working position and the standby position.
a, 26b. On the other hand, the bogie 24 includes a bogie main body 28, a pair of front and rear wheels 30a, 30b which are rotatably provided on the lower surface of the bogie main body 28, and which are in rolling contact with the above-described transport rails 26a, 26b, respectively. A drive motor 32 disposed to rotationally drive the wheels 30a, 30b, and a drive force transmission mechanism (not shown) for transmitting the drive force of the drive motor 32 to the wheels 30a, 30b.
Trolley main body 28 through the rolling of these wheels 30a, 30b on opposing transport rails 26a, 26b.
Is capable of reciprocating between the working position and the standby position.

Here, a partition wall 34 for dividing the inside into two upper and lower chambers is mounted inside the bogie main body 28, and a lower room 28 partitioned by the partition wall 34 is provided.
a, the above-described drive motor 32 is housed therein, and the upper and lower chambers 28b are provided with the first and second mold devices 14, 1.
A lift mechanism 40 for lifting base plates 36 and 38 (details of which will be described later) as mold support members individually provided in the carriage 6 from the upper surface of the bogie main body 28 is housed. The lift mechanism 40 includes a pair of left and right hydraulic cylinders 42 a and 42 b fixed on the partition wall 34.
And two roller support plates 46 connected to the upper ends of piston rods 44a and 44b capable of moving up and down of the hydraulic cylinders 42a and 42b, respectively, and a number of rollers rotatably supported by the roller support plates 46, respectively. As shown in FIG. 3, two openings 28c and 28d are formed on the upper surface of the carriage main body 28, and two roller support plates 46 can protrude upward.

The hydraulic cylinders 42a, 42b
Only when the carriage 24 is at the standby position, the rollers 48 respectively supported on the roller support plate 46 project upward from the upper surface of the carriage main body 28 through the corresponding openings 28c and 28d by a control mechanism (not shown). When the carriage 24 is located at a position other than the above, the roller 48 is driven and controlled to operate so as to be retracted below the upper surface of the carriage main body 28.

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 body 28. When the carriage 24 supports the first mold device 14, the base plate 36 corresponding to the first mold device 14 is When the lift mechanism 40 is in the lift state, the rollers 48 project above the upper surface of the carriage body 28, and the carriage 24 When supporting the first mold apparatus 14, the first mold apparatus 1
The base plate 36 corresponding to 4 is mounted on a number of rollers 48, and is movable along the left and right directions in FIGS. 1 to 3 according to the rolling of these rollers 48. Even when the cart 28 supports the second mold device 16, the corresponding base plate 38 is similarly lifted and placed by the lift mechanism 40. Here, when the lift mechanism 40 is in the lift state, the lift amount of the base plates 36 and 38 from the upper surface of the bogie main body 28 is set to about 2 mm. Next, referring to FIG. 2 again, the first and second mold apparatuses 1
The structure of the molds 4, 16 and the holding mechanism 50 for holding the mold devices 14, 16 in the blow molding machine 12 will be described in detail. First, the configuration of the first and second mold apparatuses 14 and 16 is the same. Therefore, since both are configured identically, the configuration of the first mold apparatus 14 will be described as a representative, and the second mold apparatus will be described. The description of the configuration of the mold device 16 is omitted.

That is, the first mold device (hereinafter simply referred to as a mold device) 14 is provided with a corresponding base plate 36.
And support posts 52a, 52b, 52c, 52d which are respectively erected corresponding to the four corners on the base plate 36.
(Shown in FIG. 1), and these support posts 52a, 52
b, 52c, and 52d, and a mold 54 mounted on the base plate 36 as auxiliary equipment.
And a pre-pinch mechanism 56 and an air blow mechanism 58 formed corresponding to the above. Here, the mold 54 includes a mold body 60 having cavities corresponding to the outer shape of the molded product therein, and mounting plates 62, 6 fixed respectively to the left and right sides of the mold body 60 in the drawing.
4 is provided.

That is, the above-mentioned support posts 52a, 52
b, 52c and 52d are defined as mold support surfaces, on which the mounting plate 6
The mold 54 is substantially supported on the base plate 36 by supporting both ends of the lower surfaces of the base plates 2 and 64, respectively. Here, these support posts 52a,
In the state where the mold 54 is supported on the 52b, 52c, and 52d, when the carriage 24 is transported between the molding position and the standby position as the carriage 24 travels, the support state of the mold 54 during the transport is fixed. For this purpose, the upper end surfaces of the support posts 52a and 52d located diagonally to each other and the corresponding lower end of the mounting plate 62 are clamped to each other by the first clamp mechanism 66 so that the It is made so that it may be connected. The configuration of the first clamp mechanism 66 will be described later in detail.

On the other hand, in this embodiment, the mold apparatus 14 includes a base plate 36 and the base plate 3.
6 and various components mounted on it,
When the base plate 36 is placed on the carriage 24 and is in the molding position, the mold 54 of the mold apparatus 14
It is incorporated in the blow molding machine 12 and subjected to a blow molding operation. This mold 54 is used for the blow molding machine 1.
When the mold 54 is incorporated into the mold 2, the mold 54 is released from the state in which the mold 54 is supported by the mold support surfaces of the four support posts 52a, 52b, 52c, and 52d via the attaching / detaching mechanism 68 described later. As a result, the four support posts 52a, 52b, 52c, and 52d are separated from each other, lifted upward with a predetermined distance from the mold supporting surface, and incorporated into the blow molding machine 12 in an independent state. It will be.

Further, the first mold device 14 incorporated in the blow molding machine 12 is moved to a second standby station 20.
When replacing the second mold apparatus 16 with the second mold apparatus 16 which is in standby, the assembled state of the mold 54 is released from the blow molding machine 12 via the above-mentioned attaching / detaching mechanism 68, and the four support posts 52a, The mold 54 and the base plate 36 are supported by being supported on the mold supporting surfaces 52b, 52c, and 52d. By moving the carriage 24 from the molding position to the first standby position from this state, the first mold device 14
Will be removed from the blow molding machine 12.
The operation of replacing the mold device will be described later in detail.

Next, the mold 54 in the blow molding machine 12
The structure of the attachment / detachment mechanism 68 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
A pair of upper and lower hydraulic cylinders 74 attached to inner surfaces of the fixed bases 72 facing each other;
4 is provided with a piston rod 76 which is mounted so as to be able to protrude inward from each other, and a mounting block 78 which is mounted on both ends of the upper and lower two piston rods 76 on each side. A platen 80 constituting the holding mechanism 50 is attached to each of the inner surfaces of the attachment blocks 78 facing each other. Here, the inner surface of each platen 80 and the outer surface of the mounting plate 64 located therebetween and mounted on both sides of the mold 54 are opposed to each other and can contact each other. ing.

On the inner surfaces of the platens 80 facing each other, positioning pins 82 as frustoconical truncated projections projecting toward the center and having a central axis extending horizontally are provided. Three of the mounting plates 64 are integrally formed in a state of being spaced apart from each other, and positioning pins 82 formed on a platen 80 facing the mounting plates 64 complementarily fit on the outer surfaces of the mounting plates 64. Three positioning holes 84 as concave portions are formed in a state where they are arranged vertically at three intervals. Here, each positioning pin 82
Are formed in a truncated frustoconical shape that tapers toward the center.

In the detaching mechanism 68 configured as described above, when removing the mold 54 from the blow molding machine 12,
In the state shown in FIG. 2, each hydraulic cylinder 74 draws each piston rod 76 and operates. As a result, the mold 54 is sandwiched from both sides, and the platens 80 located on both sides of the mold 54 where the mold 54 has been attached to the blow molding machine 12.
Are moved in a direction away from each other.
During this movement of each platen 80, each positioning pin 8
2 comes out of the corresponding positioning hole 84, and the inclined circumferential surface of the positioning hole 84 provided on the mold 54 side is deviated downward along the inclined circumferential surface of the positioning pin 82 coming out from the mold, thereby positioning. At least immediately before the pin 82 is completely removed from the positioning hole 84, the lower end surfaces of the two mounting plates 62, 64 constituting the mold 54 are provided with the corresponding support posts 52a, 52b, 52 at both ends.
It will be supported by the mold support surface defined by the upper surfaces of c and 52d. Then, as shown in FIG. 4, in a state where the positioning pins 82 have completely come out of the corresponding positioning holes 84, the first mold apparatus 14 having the mold 54
Can be removed from the blow molding machine 12.

On the other hand, when the mold 54 is mounted on the blow molding machine 12, the state shown in FIG. 4, that is, the first mold apparatus 14 placed on the carriage 24 is transported to the molding position. In this state, each hydraulic cylinder 74 operates to project each piston rod 76. As a result, the platens 80 that are spaced apart from each other on both sides of the mold 54 are moved in directions approaching each other. During this movement of each platen 80, each positioning pin 82 fits into a corresponding positioning hole 84, and the inclined circumferential surface of positioning hole 84 fits into the positioning pin 82 fitted therein.
At least immediately before the positioning pin 82 is completely fitted into the positioning hole 84 at least immediately before the positioning pin 82 is completely fitted into the positioning hole 84 along the inclined circumferential surface of the mounting plate 6.
The lower end surfaces of the support posts 2 and 64 are lifted at both ends from the mold support surfaces defined by the upper surfaces of the corresponding support posts 52a, 52b, 52c and 52d, and are separated upward. In this manner, the mold 54 is supported by the support posts 52a, 5
In a state of being lifted from the mold supporting surfaces of 2b, 52c, and 52d, both sides thereof are sandwiched by the platen 80 and held at the molding position.

In order to fix the platen 80 and both sides of the mold 54 while being held by the platens 80, the front and rear edges of each platen 80 are vertically separated from each other. In the state, the second clamp mechanisms 86 are provided. That is, the second clamp mechanism 86
When the platen 80 located on the right side in FIG. 2 is viewed from the front, as shown in FIG. 5, the platen 80 is provided at each of the upper and lower portions on both left and right side edges of the platen 80. In other words, A total of eight platens 80 are provided. Since these second clamp mechanisms 86 have the same configuration, the second clamp mechanism 86 at the lower right in FIG. 5 will be described with the second clamp mechanism 86 taken out, and the configuration of the other second clamp mechanism 86 will be described. Is omitted.

Here, the second clamp mechanism 86
As shown in FIGS. 6 to 8, the platen 80 located on the right side in FIG. 2 extends horizontally along the left side in FIG. 2 with the right side in FIG. 5 limited. Keyway 8
8 is formed in an open state. This keyway 88
As shown in FIGS. 6 and 7, the platen 80 has an opening at the front end face in FIG. 2, and as shown in FIG. 8, the platen 80 has a narrow portion 88 opened at the left side in FIG.
a and a wide portion 88b communicating with the back side of the narrow portion 88a.
It is composed of On the other hand, as is clear from FIG. 8, in a state where the keyway 88 communicates with the narrow portion 88a,
A communication groove 90 is formed in the mounting plate 64. This communication groove 90 also opens at the front end face 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 drawing (that is, the front end surface in FIG. 2) is a platen 80.
End in a state deviated to the left side in the figure from the right side in the figure. In other words, both sides of the mounting plate 64 are offset inward by a predetermined distance from both sides of the corresponding platen 80.

On the other hand, as shown in FIG. 6, the first end of the platen 80 is
The first pneumatic cylinder 94 has a pneumatic cylinder 94 mounted thereon. The distal end of the first piston rod 96 of the first pneumatic cylinder 94 is located in the wide portion 88b of the key groove 88 described above and is movable along the same. A simple clamp member 98 is attached. The clamp member 98 includes a narrow portion 8 of the keyway 88.
8a, a second piston rod 1 projecting outwardly
The distal end of the second piston rod 100 is housed in the second pneumatic cylinder 102. Here, the second piston rod 1
00 is a communication groove 90 formed in the mounting plate 64.
And the second pneumatic cylinder 1
The inner end surface of the mounting plate 02 can be engaged with the outer surface of the mounting plate 64.

Since the second clamp mechanism 86 is constructed as described above, the first pneumatic cylinder 94 pushes and drives the corresponding first piston rod 96 to move the clamp member 98 into the key groove 88. In a state in which the second pneumatic cylinder 102 has been moved to a deep position, 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. In this state, the second pneumatic cylinder 102 pulls in and drives the corresponding second piston rod 100, so that the clamp member 9 connected to the tip of the second piston rod 100 is driven.
8 retracts the platen 80. As a result, the mounting plate 64 is firmly held between the outer surface of the platen 80 and the inner end surface of the second pneumatic cylinder 102, and the mold 5
A so-called second clamping state is achieved by the platen 80 of FIG.

On the other hand, when the second pneumatic cylinder 102 pushes and drives the corresponding second piston rod 100, the second pneumatic cylinder 102 moves between the outer surface of the platen 80 of the mounting plate 64 and the inner end surface of the second pneumatic cylinder 102. Is released. From this state, the first pneumatic cylinder 9
4 drives the corresponding first piston rod by pulling in, so that the clamp member 98 and the second member connected thereto are driven.
Is moved to the near side. 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 a dashed line in FIG.
Is in a state where it can be separated from the platen 80. That is, in this manner, a so-called second unclamping state of the mold 54 to the platen 80 is achieved. Next, in order to fix the support state of the first clamp mechanism 66 described above, that is, the support of the mold 54 during transportation, the upper end surfaces of the support posts 52a and 52d positioned diagonally to each other, and The configuration of the first clamping mechanism 66 for clamping and mechanically connecting the corresponding lower end portions of the mounting plate 62 to each other will be described with reference to FIGS. 9 and 10.

Here, the first clamp mechanism 66
The support post 52a and the support post 52d have the same configuration, and therefore, in the following description, the configuration for the support post 52a will be described.
The description of the configuration for 2d is omitted. That is, as shown in FIG. 9, the first clamp mechanism 66 is provided with an 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. It is provided integrally below. This engagement block 104
Is formed with a clamp hole 106 penetrating along a direction perpendicular 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 a third piston rod is attached to the third pneumatic cylinder 110. A third piston rod 112 is attached to the engagement block 10 so as to be movable forward and backward.
A so-called clamp pin, which is provided so as to be freely inserted into a clamp hole 106 formed in the engagement block 104 when the support member 4 is placed on the mold supporting surface of the corresponding support post 52a, is defined.

Since the first clamp mechanism 66 is configured as described above, as shown in FIG. 9, the mold 54 is lowered by the above-described detaching operation of the mold 54 by the attaching / detaching 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 distal end of the third piston rod 112 fits into the corresponding clamp hole 106 as shown in FIG. 10, and thus the support post 52a and the corresponding engaging member are fitted. The coupling block 104 is mechanically connected, so that a so-called first clamping 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, when the third pneumatic cylinder 110 draws and drives the corresponding third piston rod 112, the crankpin is pulled out from the corresponding clamp hole 106. In this manner, the mechanical connection between the support post 52a and the corresponding engagement block 104 is released, and as a result, the so-called first unclamping state between the support post 52a and the mold 54 is released. Is achieved.

Next, returning to FIG. 1, the corresponding first and second standby stations 18 and 20 in the first and second standby stations 18 and 20 will be described.
A description will be given of the configuration of the pull-in drive mechanism 114 for pulling in the first or second die apparatus 14, 16 conveyed with the movement of the carriage 24 to the corresponding standby station 18, 20 to the corresponding standby station 18, 20. I do. This retraction drive mechanism 1
14 has the same configuration 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 here. The description of the configuration of the retraction drive mechanism is omitted.

That is, the pull-in drive mechanism 114 is disposed on a side remote from the exchange transport path 22 and is driven by a drive motor (not shown) to be rotated around a vertical axis. , A driven sprocket 118 rotatable about a vertical axis, and a driving sprocket 116 and a driven sprocket 118.
, A locking pin 122 fixed in a state of being upright on a part of the chain 120, and a corresponding first plate of the base plate 36 of the first mold apparatus 14. The locking plate 124 is integrally formed so as to extend from one side edge of the standby station 18 side toward the first standby station 18 and is locked with the locking pin 122 described above. .

The locking plate 124 has a substantially inverted L-shaped locking groove 126 for locking the locking pin 122 described above. That is, this locking groove 12
6 is inserted when the locking pin 122 moves to the right in the figure and passes by the driven sprocket 118, passes through the driven sprocket 118, and enters into the inside, and moves to the left in the figure. With the movement of the locking plate 124, the locking plate 124 is formed so as to be integrally driven by being pulled in. In other words, the first mold device 14 at the first standby position is pulled together with the base plate 36 onto the first standby station 18 in accordance with the pull-in operation.

On the other hand, when the locking pin 122 is driven to move in the reverse direction, the releasing operation is executed in a completely opposite manner to the above-described operation, and the first mold device on the first standby station 18 is moved. 14 is driven to the first standby position, and when the first mold apparatus 14 is brought to the first standby position, the locking pin 122 passes around the driven sprocket 118 and It is taken out from the locking groove 126 and moves alone to the left in the figure. That is, the first
In response to the pushing operation, the first mold device 14 on the standby station 18 of the first
Will be pushed out to the standby position.

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

First, when this mold exchanging operation is started,
From the state shown in FIG. 2, first, the second clamp mechanism 86 is activated to bring the space between the platen 80 and the corresponding mounting plates 62 and 64 in the first mold apparatus 14 to the second unclamped state. . Thereafter, the hydraulic cylinder 74 draws and drives the corresponding piston rod 76 in the attachment / detachment mechanism 68, 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 between 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 and 64 constituting the mold 54 are lowered. Then, it comes into contact with the mold supporting surface defined by the upper surfaces of the four support posts 52a, 52b, 52c, and 52d from above and is supported here. In this state, the mold 54 is separated from the blow molding machine 12 in an independent state, and is integrally formed with the corresponding base plate 36.

Thereafter, the first clamp mechanism 66 is activated, the two mounting plates 62, 64 of the mold 54 and the corresponding support posts 52a, 52d are brought into the first clamped state, and the carriage 24 travels. However, the mold 54 is stably held on the four support posts 52a, 52b, 52c, 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 stops at the first standby position. In this state, the lift mechanism 40 is started, and the roller 48 is lifted, and the base plate 3
6 is lifted from the upper surface of the carriage main body 28 to be in a state of being supported by these rollers 48. This lift mechanism 40
By the lifting operation, the first mold device 14 is made movable along with the base plate 36.

Thereafter, the pull-in 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 die station 14 into the first standby station. Bring on 18 Thus, first, the standby operation of the first mold device 14 to the corresponding first standby station 18 ends. And
The carriage 24 travels from the first standby position to the second standby position, and stops at the second standby position. In this state, the second
The pull-in mechanism 114 in the standby station 20 is activated, and the second mold apparatus 16 waiting here is pushed into the carriage 24 together with the base plate 38 to be driven. In this way, the second mold device 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 reverse direction to lower the rollers 48, and the base plate 38 is placed on the upper surface of the bogie main body 28.

In the second mold apparatus 16, the first
Of the second mold apparatus 1 has already been activated.
6, the two mounting plates 62, 64 of the mold 54.
And the corresponding support posts 52a and 52d are in the first clamped state, and the mold 54 is held in a stable state on the four support posts 52a, 52b, 52c and 52d even when the carriage 24 runs. It has been made to be. Therefore,
When the second mold apparatus 16 is moved onto the carriage 24 at 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 the two mounting plates 62, 6 of the mold 54 in the second mold apparatus 16 are operated.
4 and the corresponding support posts 52a and 52d are in a first unclamped state.

Thereafter, the attachment / detachment mechanism 68 drives the hydraulic cylinder 74 to push 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, 64 constituting the mold 54 in the second mold apparatus 16 are formed by the four support posts 52a, 52b. , 52c, 52d
Is lifted up from above the mold supporting surface defined by the upper surface of the mold, and is separated from these independently. In this state, the mold 54 in the second mold apparatus 16 is mounted on the blow molding machine 12. Thereafter, the second clamp mechanism 86 is activated in the reverse direction to bring the gap between the platen 80 of the second mold apparatus 16 and the corresponding mounting plate 62, 64 to the second clamp state. As a result, the platen 80 and the second mold device 1
6 are mechanically connected to each other
Is to be integrally mounted on the blow molding machine 12.

In this manner, the mold device mounted on the blow molding machine 12 is changed from the first mold device 14 to the second mold device 16. As detailed above,
In this embodiment, the use of the cart 24 having a very simple structure allows the mold apparatus to be efficiently exchanged from the blow molding machine 12, and the time required for the exchange to be extremely short. Can be done. The present invention is not limited to the configuration of the embodiment described above, and it goes without saying that various modifications can be made without departing from the gist of the present invention.

[0041]

As described in detail above, the mold changing 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.
In a mold exchanging apparatus for exchanging a mold apparatus comprising a mold supporting member having a mold supporting surface for supporting the mold, a blow molding operation is performed using the mold apparatus. And a carriage on which the mold supporting member is removably mounted between a position and a discharge position for discharging the mold device used for the blow molding operation to a standby portion, and the molding position. It is arranged on both sides of the mold of the mold apparatus located in, and is fixed at the molding position by sandwiching the mold from both sides, and is molded by separating from the mold toward both sides. A pair of platens to be released from a position, and detaching means for driving the platens toward and away from the mold to detach and attach a mold device to the blow molding machine; Both platelets facing each side And the platen is supported on the mold supporting surface of the mold supporting member placed on the carriage at the molding position with the clamping operation of the platen with respect to the mold. The mold of the mold support member placed on the carriage at the molding position, with the mold being lifted from here, and with the separating operation of the platen from the state of holding the mold from both sides. On the support surface, there is provided a detachable means for supporting the mold.

In the mold changing apparatus for a blow molding machine according to the present invention, the attachment / detachment mechanism is formed on one of both side surfaces of the mold and inner side surfaces of both platens opposed to the both side surfaces, respectively. A substantially frustoconical protrusion having a central axis along the direction of movement of the platen, and both sides of the mold and the other side of the inner surfaces of both platens opposed to the both sides, respectively. A concave portion that complementarily fits into the portion, and the die is lifted from the die support surface by engagement between the peripheral surfaces accompanying the fitting of the platen with the die during the clamping operation of the die. It is characterized by being driven. Further, in the mold changing device of the blow molding machine according to the present invention, the attachment / detachment mechanism includes a plurality of recesses formed on each side surface of the mold, and a protrusion formed on an inner surface of each platen includes: A plurality of recesses are provided corresponding to the plurality of recesses, respectively.

In the mold changing apparatus for a blow molding machine according to the present invention, the mold supporting member is provided so as to be able to protrude upward from an upper surface of the cart, and the mold supporting member is connected to the cart. Is further provided with a lift means for driving it to protrude upward only when it is at the discharge position. Further, in the mold changing apparatus for a blow molding machine according to the present invention, auxiliary equipment necessary for blow molding is provided on the mold support member. Further, in the mold changing device for a blow molding machine according to the present invention, the auxiliary devices are set to a type corresponding to a type of a mold supported by a mold supporting member to which the auxiliary device is attached. And Therefore, according to this invention, with a simple bogie configuration,
A mold changing device of a blow molding machine capable of efficiently changing a mold device is provided.

[Brief description of the drawings]

FIG. 1 is a top view schematically showing a configuration of an embodiment of a mold changing device of 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 and detaching a mold to and from a blow molding machine.

FIG. 3 is a top view showing a top structure of the cart shown in FIG. 1;

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

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

FIG. 6 is a plan sectional view showing a configuration of a second clamp mechanism.

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

FIG. 8 is a front sectional view showing a configuration of a second crank mechanism.

FIG. 9 is a side view of the configuration of the first clamp mechanism taken out in a first clamp 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 Die changing apparatus, 12 Blow molding machine, 14 1st die apparatus, 16 2nd die apparatus, 18 1st standby station, 20 2nd standby station, 22 exchange conveyance path, 24 cart, 26a 28b; 28b room; 28c; 28d opening; 30a; 30b wheels; 32 drive motor; 34 partition wall; 36; 38 base plate; 40 lift mechanism; 42a; 42b hydraulic cylinder; 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 base, 74 hydraulic cylinder, 76 piston rod, 78 mounting block, 80 platen, 82 positioning pin, 84 positioning hole, 86 second clamp mechanism, 88 key groove, 90 communication groove, 92 stay, 94 first pneumatic cylinder 96 first piston rod, 98 clamp member, 100 second piston rod, 102 second pneumatic cylinder, 104 engagement block, 106 clamp hole, 108 stay, 110 third pneumatic cylinder, 112 third piston rod 114, a retract drive mechanism, 116 a drive sprocket, 118 a driven sprocket, 120 chains, 122 locking pins, 124 locking plates, and 126 locking grooves.

Claims (6)

(57) [Scope of request for utility model registration] 1. A mold apparatus used for a 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. A mold exchanging device for exchanging a mold, wherein 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 ejected to a standby unit. A trolley on which the mold supporting member is removably mounted, and disposed on both sides of the mold of the mold apparatus at the molding position;
A pair of platens that clamps the mold from both sides to fix the mold at the molding position and separates the mold from both sides from the mold to release the mold from the molding position. Means for attaching and detaching the mold apparatus to and from the blow molding machine by moving the mold apparatus into and out of the blow molding machine. The mold supported by the mold supporting member placed on the carriage at the molding position is supported by the mold supporting surface on the mold supporting surface. Lift and
Along with the separating operation of the platen from the state of holding the mold from both sides, the mold is placed on the mold supporting surface of the mold supporting member placed on the carriage at the molding position. A mold changing device for a blow molding machine, comprising: a detachable means for supporting the mold. 2. The truncated mounting mechanism is formed on one of both side surfaces of the mold and inner side surfaces of both platens opposed to the both side surfaces, respectively, and has a substantially truncated center having a central axis along a moving direction of the platen. A truncated cone-shaped protrusion, and a recess formed on the other of the two side surfaces of the mold and the inner side surfaces of the two platens opposed to the both side surfaces, respectively, and being fitted complementarily to the protrusion, 2. The mold is lifted up from the mold support surface by engagement between the peripheral surfaces accompanying the fitting of the platen and the mold during the clamping operation of the mold.
A die changing device for a blow molding machine according to item 1. 3. The detaching mechanism includes a plurality of recesses formed on each side surface of the mold, and a plurality of protrusions formed on an inner surface of each platen correspond to the plurality of recesses, respectively. The die changing device for a blow molding machine according to claim 2, wherein the die changing device is used. 4. The mold supporting member is provided so as to be able to protrude upward from an upper surface of the cart, and the mold supporting member is protruded upward only when the cart is at the discharge position. The die changing device for a blow molding machine according to claim 1, further comprising a lifting means for driving the blow molding machine. 5. The mold changing device for a blow molding machine according to claim 1, wherein auxiliary equipment necessary for blow molding is provided on said mold supporting member. 6. The blow molding machine according to claim 5, wherein said auxiliary equipment is set to a type corresponding to a type of a mold supported by a mold supporting member to which said auxiliary equipment is attached. Mold changer.