JP7317308B2 - molding equipment - Google Patents

Description

The present invention relates to a molding apparatus capable of transferring a mold clamping device for opening and closing a mold.

Conventionally, a molding apparatus is used in which a parison supplied from an extrusion device is placed in a mold of a mold clamping device and air is blown into the parison to obtain a molded product. For example, Patent Literature 1 discloses a mold clamping device capable of synchronizing a pair of platens for fixing a mold and moving them toward a predetermined parting line (mold clamping reference plane). Some of such molding apparatuses are provided with transfer means for transferring the mold clamping device for attachment and detachment of the mold and for maintenance.

JP-A-7-32366

By the way, the molded product taken out from the mold after being clamped by the mold clamping device has a burr portion protruding from the pinch-off portion of the mold, and it is necessary to remove the burr portion. It is effective to increase the mold clamping force of the mold clamping device in order to facilitate removal of the burrs. It is necessary to increase the size or complicate the configuration.

However, if the weight of the mold clamping device increases as the size and complexity of the mold clamping device increases, the load on the motor that drives the transfer means increases. There was a risk of overload.

SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and provides a molding apparatus having transfer means capable of transferring a heavy mold clamping device.

According to the present invention, there is provided a molding apparatus for molding a molded article, which includes a mold clamping device for clamping a parison extruded from an extrusion device to obtain a molded product, and a transfer rail for movably supporting the mold clamping device. and an electric cylinder for transferring the mold clamping device along the transfer rail, wherein the mold clamping device comprises first and second platens holding molds, and bringing the first and second platens closer and closer to each other. The electric cylinder has a motor having an output shaft, and a feed screw mechanism that converts rotary motion of the output shaft into linear motion, and the following (1) and (2): A molding apparatus is provided further comprising at least one configuration of
(1) The motor is a brake motor having a brake, and the brake can brake the rotation of the output shaft.
(2) A clutch is provided, and the clutch can switch between a state in which the output shaft and the feed screw mechanism are connected and a state in which the connection between the output shaft and the feed screw mechanism is loosened. .

According to the present invention, for example, when rapidly decelerating the mold clamping device during transfer by an electric cylinder as transfer means, if the above-described configuration (1) is provided, the rotation axis due to the inertial force of the mold clamping device can be braked by the brake, the load on the motor can be reduced even if the mold clamping device is heavy. Also, in the case of having the above configuration (2), when the load (torque) becomes large, the clutch loosens the connection between the output shaft of the motor and the ball screw mechanism, thereby reducing the load on the motor. be able to.

Preferably, the mold clamping device includes a third platen connected to the first platen via tie bars, the mold clamping driving means includes slide driving means and a toggle mechanism, and the toggle mechanism connects the second platen and the third platen, and moves the second and third platens toward and away from each other by driving the slide driving means.

Preferably, the toggle mechanism includes a pair of first toggle links, a pair of second toggle links, a pair of auxiliary links, and a connecting member, and one end side of the first toggle link is connected to the third platen. The other end of the first toggle link is rotatably connected to one end of the second toggle link, and the other end of the second toggle link is rotatable with the second platen. one end of each of the auxiliary links is rotatably connected to the first toggle link; the other end of each of the pair of auxiliary links is rotatably connected to the connecting member; The drive means is configured to move the connecting member in the mold clamping direction.

Preferably, the mold clamping device includes mold clamping rails and mold clamping reference surface holding means, the mold clamping rails horizontally movably supporting the first to third platens, and the mold clamping reference surfaces The holding means is configured such that the first and second platens move symmetrically with respect to the mold clamping reference plane of the mold.

Preferably, the transfer rail extends in a direction perpendicular to the mold clamping direction of the mold clamping device.

BRIEF DESCRIPTION OF THE DRAWINGS It is a top view which shows the shaping|molding apparatus 1 which concerns on 1st Embodiment of this invention. 2A is a side view of the configuration of the molding apparatus 1 of FIG. 1 excluding the electric cylinder 6, and FIG. 2B is a front view of the molding apparatus 1 of FIG. 3A and 3B are explanatory diagrams showing the operation of the mold clamping device 2 of the molding device 1 of FIG. 4A and 4B are explanatory diagrams showing the operation of the mold clamping reference surface holding means 50 of the mold clamping device 2 of FIG. 5A and 5B are plan views showing the electric cylinder 6 of the molding apparatus 1 of FIG. 1. FIG. 6 is a block diagram showing the configuration of an electric cylinder 6 of FIG. 5; FIG. 7A and 7B are explanatory diagrams showing how the mold clamping device 2 is transferred by the electric cylinder 6 of FIG. FIGS. 8A and 8B are explanatory diagrams showing from other angles how the mold clamping device 2 is transferred by the electric cylinder 6 of FIG. 9A to 9C are explanatory diagrams schematically showing the operation of one mode of the deburring device 100 provided in the molding apparatus 1 of FIG. 1. FIG. 1 is a plan view showing a state in which a plurality of molding apparatuses 1 according to a first embodiment of the present invention are arranged; FIG. 11A to 11C are explanatory diagrams schematically showing the operation of a modification of the deburring device 100 provided in the molding apparatus 1 of FIG. 1. FIG. 12A to 12C are explanatory diagrams schematically showing the operation of another modified example of the deburring device 100 provided in the molding apparatus 1 of FIG.

Embodiments of the present invention will be described below. Various features shown in the embodiments shown below can be combined with each other. In addition, the invention is established independently for each feature.

A molding apparatus 1 according to one embodiment of the present invention includes a mold clamping device 2, an electric cylinder 6 as transfer means, and transfer rails 10, as shown in FIG. The mold clamping device 2 is a device for clamping a cylindrical parison supplied from an extrusion device 11 (see FIG. 2A) and blowing air into it to obtain a molded product. The electric cylinder 6 transfers the mold clamping device 2 placed on the transfer rail 10 along the transfer rail 10 . The transfer rail 10 supports the mold clamping device 2 in a transferable manner. In this embodiment, two transfer rails 10 are provided along the transfer direction of the mold clamping device 2 and extend in a direction perpendicular to the mold clamping direction of the mold clamping device 2 in this embodiment. The configurations and operations of the mold clamping device 2 and the electric cylinder 6 will be described below.

<Mold clamping device 2>
As shown in FIGS. 1, 2A and 2B, the mold clamping device 2 includes a movable table 21, a mold clamping rail 22, a first platen 23 to a third platen 25, and four tie bars (tie bars 26 to 25). 29), a mold clamping drive means 30, and a mold clamping reference plane holding means 50.

As shown in FIGS. 2A and 2B, a pair of guide blocks 21a are attached to the lower surface of the movable table 21 at two locations in the longitudinal direction of the transfer rail 10, a total of four locations. The movable table 21 is guided along the transfer rails 10 by the movement of the guide block 21 a on the pair of transfer rails 10 . Two mold clamping rails 22 are arranged in parallel on the upper surface of the movable table 21 to support the first platen 23 to the third platen 25 so as to be able to move horizontally over the mold clamping direction (horizontal direction in FIG. 2A). be done. In addition, a pinion holding member 51 of mold clamping reference surface holding means 50, which will be described later, is fixed to the upper surface of the movable table 21. As shown in FIG.

The first platen 23 to the third platen 25 are arranged on the pair of mold clamping rails 22 in this order, as shown in FIG. 2A. A pair of guide blocks 23a to 25a are attached to the lower surfaces of the first to third platens 23 to 25, respectively. The first platen 23 to the third platen 25 are guided along the mold clamping rail 22 by moving the guide blocks 23a to 25a on the pair of transfer rails 10 . That is, each of the first platen 23 to the third platen 25 is movable. As shown in FIGS. 3A and 3B, the first platen 23 holds the split mold MA and the second platen 24 holds the split mold MB.

As shown in FIGS. 2A and 2B, tie bars 26 to 29 are inserted through the corners of the first to third platens 23 to 25 in parallel with the mold clamping rails 22 in a square arrangement. Note that in FIG. 2A, part of the tie bars 27 and 29 is drawn with imaginary lines. One end side (left end side in FIG. 2A) of the tie bars 26-29 is fixed to the first platen 23, and the other end side (right end side in FIG. 2A) of the tie bars 26-29 is fixed to the third platen 25. Thereby, the first platen 23 and the third platen 25 operate in conjunction with each other. A second platen 24 is arranged between the first platen 23 and the third platen 25 and slides along the tie bars 26-29.

The mold clamp driving means 30 is used to bring the first platen 23 and the second platen 24 closer to each other and away from each other, as shown in FIGS. 3A and 3B. The mold clamping drive means 30 includes a slide drive means 31 and a toggle mechanism 41, as shown in FIG. 2A.

The slide driving means 31 includes a mold clamping servo motor 32 , a ball screw 33 and a ball nut 34 . The mold clamping servomotor 32 is fixed to the third platen 25 . The ball screw 33 is arranged parallel to the mold clamping rail 22 . The slide driving means 31 is configured such that the ball nut 34 moves along the ball screw 33 when the ball screw 33 is rotated by driving the mold clamping servomotor 32 .

The toggle mechanism 41 connects the second platen 24 and the third platen 25 with a link, and is configured to approach and separate the second platen 24 and the third platen 25 by driving the slide driving means 31 . Specifically, as shown in FIG. 2A, the toggle mechanism 41 includes a pair of upper and lower first toggle links 42, a pair of upper and lower second toggle links 43, a pair of upper and lower auxiliary links 44, and a connecting member 45. Prepare. In this embodiment, the pair of first toggle links 42, the pair of second toggle links 43, and the pair of auxiliary links 44 are each provided in two systems in a direction perpendicular to the mold clamping direction (depth direction in FIG. 2A). (See Figure 1). However, since they have the same configuration and the same function, only one system will be described below.

One end side of the first toggle link 42 is rotatably connected to the third platen 25 via a bracket 25b and a pin 25c. Here, the bracket 25b extends longer in the longitudinal direction than the longitudinal length of the first toggle link 42, and is connected to the first toggle link 42 via the pin 25c at its end. The other end side of the first toggle link 42 is rotatably connected to one end side of the second toggle link 43 via a pin 46 . The other end side of the second toggle link 43 is rotatably connected to the second platen 24 via a bracket 24b and a pin 24c. One end side of the auxiliary link 44 is rotatably connected to the first toggle link 42 via a pin 47 , and the other end side of the pair of auxiliary links 44 is rotatable to the connecting member 45 via a pin 48 . movably connected.

The connecting member 45 holds the ball nut 34 of the slide driving means 31 . As a result, the connecting member 45 moves in the direction along the mold clamping rail 22 as the ball nut 34 moves due to the rotation of the ball screw 33 .

Next, the mold clamping reference plane holding means 50 includes a pinion holding member 51, a pinion 52, a first rack 53, and a second rack 54, as shown in FIGS. 4A and 4B. The pinion holding member 51 is fixed to the upper surface of the movable table 21 and supports the pinion 52 so as to be rotatable around a rotation axis perpendicular to the clamping direction. The pinion 52 is arranged to mesh with the teeth 53a of the first rack 53 and the teeth 54a of the second rack 54 at positions between the first rack 53 and the second rack 54 arranged parallel to the mold clamping rail 22, respectively. be. The first rack 53 is fixed to the first platen 23 via a fixing member 23d, and the second rack 54 is fixed to the second platen 24 via a fixing member 24d. The pinion 52, first rack 53 and second rack 54 constitute a rack and pinion mechanism.

Since the first platen 23 and the second platen 24 are connected to the pinion 52 via the first rack 53 and the second rack 54, respectively, the platen 23 and the second platen 24 rotate in opposite directions by an equal distance according to the rotation of the pinion 52, respectively. will move. With such a configuration, the mold clamping reference surface holding means 50 maintains the first platen 23 and the second platen 24 on the mold clamping reference surface S of the molds MA and MB shown in FIGS. center position when tightened).

The operation of the mold clamping device 2 having the above configuration will be described below with reference to FIGS. 3A and 3B. When the mold clamping servomotor 32 of the slide driving means 31 is driven from the state in which the molds MA and MB of FIG. direction (to the left in FIG. 3A). Then, the pair of auxiliary links 44, the first toggle link 42 and the second toggle link 43 operate together, and the distance between the second platen 24 and the third platen 25 increases. At the same time, the distance between the first platen 23 and the second platen 24 approaches.

When the connecting member 45 is further moved by driving the mold clamping servomotor 32, the bracket 25b of the third platen 25, the first toggle link 42 and the second toggle link 43 are aligned in a straight line as shown in FIG. 3B. . In this state, the split mold MA held by the first platen 23 and the split mold MB held by the second platen 24 are clamped.

Note that the first platen 23 to the third platen 25 are all movable on the mold clamping rails 22 during the above operation. However, since the mold clamping device 2 of this embodiment includes the mold clamping reference plane holding means 50, the movement of the first platen 23 and the second platen 24 is restricted, and the first platen 23 and the second platen 24 are An equidistant positional relationship with respect to the mold clamping reference plane S is maintained. Therefore, by setting the mold clamping reference plane S directly below the extruding device 11 (see FIG. 2A), the parison suspended from the extruding device 11 can be clamped without being displaced. By blowing air into the parison in this state, it is possible to obtain a molded product that conforms to the shape of the cavity formed on the inner surface of the mold.

On the other hand, when the mold clamping servomotor 32 is reversely rotated from the state of FIG. 3B, the first platen 23 and the second platen 24 are separated, and the mold can be opened.

As described above, the mold clamping device 2 of the present embodiment is configured so that the molds are clamped when the first toggle link 42 and the second toggle link 43 are aligned on a straight line. can be significantly increased. In addition, since the mold clamping device 2 of this embodiment is provided with two systems of the pair of first toggle links 42, the pair of second toggle links 43, and the pair of auxiliary links 44, the clamping force can be further increased and the accuracy can be improved. can be improved.

<Electric cylinder 6>
Next, as shown in FIGS. 5A, 5B, and 6, the electric cylinder 6 includes a brake motor 60, a reduction gear 70, a slip clutch 80 as a clutch, and a ball screw mechanism 90 as a feed screw mechanism. Prepare. The electric cylinder 6 is used for attaching and detaching the molds MA and MB of the mold clamping device 2 and for maintenance, and for continuous operation of the molding device 1, which will be described later.

The brake motor 60 includes a motor 61 having an output shaft 61a and a brake 62, as shown in FIG. In this embodiment, the brake 62 is a spring closed type non-excitation electromagnetic brake that generates a braking force with a spring. Specifically, the brake 62 includes a coil, an armature, a disk, a plate, and a spring (not shown). A rotating disk is made into a rotation-free state. The brake 62 presses the armature with a spring and generates a braking force by sandwiching the disc between the armature and the plate to brake the rotation of the output shaft 61a. The brake motor 60 may have a configuration in which the motor 61 and the brake 62 are integrated, or may be arranged separately without being integrated. Alternatively, the brake 62 may be a permanently closed non-excitation electromagnetic brake that produces a braking force with a permanent magnet.

The reduction gear 70 reduces the speed of rotation of the brake motor 60 and transmits it to the slip clutch 80 .

Slip clutch 80 is used as a back torque limiter. Specifically, the slip clutch 80 of this embodiment has a main driving shaft connected to the output shaft 61a of the motor 61 via the reduction gear 70 and a driven shaft connected to the ball screw 91 of the ball screw mechanism 90. provided (not shown). The slip clutch 80 responds to forward power, that is, power from the output shaft 61a side of the motor 61 to the ball screw 91 side of the ball screw mechanism 90 by interlocking rotation of the main driving shaft and the driven shaft. Power is transmitted by connecting the output shaft 61a and the ball screw 91 . On the other hand, when excessive torque (back torque) acts in the opposite direction, that is, from the ball screw 91 side to the output shaft 61a side, the connection between the main driving shaft and the driven shaft is loosened (half-clutch state), resulting in output The connection between the shaft 61a and the ball screw 91 can be loosened. As the slip clutch 80, one having a known configuration can be used.

A ball screw mechanism 90 is used to convert rotary motion into linear motion. The ball screw mechanism 90 includes a ball screw 91, a nut 92, a rod 93, and an outer cylinder 94 (see FIGS. 5A and 5B) covering the ball screw 91 and the nut 92, as shown in FIG. In addition, a plurality of endlessly circulating balls are arranged between the ball screw 91 and the nut 92, and can be operated with a slight frictional resistance. A known configuration can be used for the configuration of the ball screw mechanism 90 . It is also possible to use a feed screw mechanism that does not use balls instead of the ball screw mechanism 90 .

The ball screw 91 of this embodiment is connected to the motor 61 via the slip clutch 80 and the speed reducer 70 as described above, and is driven by the motor 61 to rotate. The nut 92 moves in the longitudinal direction of the ball screw 91 as the ball screw 91 rotates. A rod 93 is attached to the nut 92, and as shown in FIGS. 5A and 5B, the rod 93 expands and contracts with respect to the outer cylinder 94 as the nut 92 moves. A fixed portion 93 a is provided at the tip of the rod 93 . 1 and 2B, the fixing portion 93a of the present embodiment passes through a through hole 21b (see FIG. 2A) provided in the movable base 21 of the mold clamping device 2, and is opposite to the electric cylinder 6. It is fixed to the movable table 21 at the side position. With such a fixing mode, the electric cylinder 6 can be installed at a position closer to the mold clamping device 2 than in the case where the fixing portion 93a is fixed at a position on the electric cylinder 6 side of the movable table 21. It is possible to reduce the installation area of the device 1 .

The operation of the electric cylinder 6 configured as described above will be described below with reference to FIGS. 7A to 8B.

7A and 8A show the state of the electric cylinder 6 when the mold clamping device 2 of this embodiment clamps the mold. A point P in FIG. 7A is a drop point of the parison suspended from the head 11h (see FIG. 2A) of the extrusion device 11 in FIG. 2A. In this state, the mold clamping device 2 clamps the parison. Here, when the mold clamping device 2 is in the mold clamping position, the ball screw mechanism 90 of the electric cylinder 6 is in a state where the rod 93 is extended.

When the motor 61 of the electric cylinder 6 is driven from the states of FIGS. 7A and 8A, the ball screw 91 of the ball screw mechanism 90 rotates via the reduction gear 70 and the slip clutch 80 . As the ball screw 91 rotates, the nut 92 moves and the rod 93 attached to the nut 92 contracts, thereby transferring the mold clamping device 2 . Here, when the mold clamping device 2 is accelerated by the electric cylinder 6, the main drive shaft and the driven shaft of the slip clutch 80 are reliably connected, and are interlocked to rotate to transmit power. Further, when decelerating the mold clamping device 2, the output of the motor 61 is lowered and the brake 62 is operated.

Then, when the rod 93 is contracted and substantially the entirety of it is accommodated in the outer cylinder 94, and the state shown in FIGS. 7B and 8B is reached, the transfer operation is completed. By driving the motor 61 in the opposite direction from the states shown in FIGS. 7B and 8B, the states shown in FIGS. 7A and 8A can be obtained again. As described above, the mold clamping device 2 of this embodiment is transferred on the transfer rail 10 by the extension and contraction of the rod 93 of the electric cylinder 6 .

<Deburring device 100>
It should be noted that burrs Xb are adhered to the molded article X that has been clamped by the mold clamping device 2 of the present embodiment, opened from the mold, and taken out (see FIG. 9A). The molding apparatus 1 of this embodiment includes a deburring device 100 shown in FIGS. 9A to 9D to remove the burrs Xb. A deburring device 100 includes a robot arm 101 , a support member 102 and a pair of swing members 103 . The operation of the deburring device 100 will be briefly described below.

In the deburring operation of the deburring device 100, first, as shown in FIG. 9A, the robot arm 101 sucks and holds the molded product X. As shown in FIG. Next, as shown in FIG. 9B, the lower part of the molded article X is supported by the support member 102. Then, as shown in FIG. Next, as shown in FIG. 9C, the arm 103a of the oscillating member 103 is rotated about the rotating shaft 103b arranged at substantially the same height as the burr Xb to knock down the burr Xb. Finally, as shown in FIG. 9D, the support by the support member 102 is released, the robot arm 101 transports the molded product X to a predetermined position, and the deburring operation is completed.

By the way, in order to remove the burrs Xb of the molded product X with this deburring device 100, it is preferable to pinch off the molds with a strong mold clamping force. In this regard, since the mold clamping device 2 of this embodiment includes the toggle mechanism 41 described above, it is possible to clamp the molds with a sufficient mold clamping force.

However, the mold clamping device 2 of this embodiment adopts the above-described toggle mechanism 41 to increase the mold clamping force. increased weight. Therefore, when such a heavy mold clamping device 2 is transferred by the electric cylinder 6, the moment of inertia increases and the load on the motor 61 increases, especially during acceleration and deceleration.

However, in this regard, since the electric cylinder 6 of the present embodiment uses the brake motor 60, the load on the motor 61 is reduced by braking with the brake 62, especially during deceleration of the mold clamping device 2. It is possible. In addition, the electric cylinder 6 of this embodiment has a slip clutch 80 . As a result, when excessive torque (back torque) acts from the ball screw 91 side to the output shaft 61a side due to the inertial force of the mold clamping device 2, the connection between the output shaft 61a and the ball screw 91 is loosened (disconnected). ), the load on the motor 61 can be reduced.

As a mode of use of the molding apparatus 1, it is assumed that parisons are continuously supplied from one extrusion apparatus 11, and mold clamping is performed continuously by transferring and alternately using a plurality of mold clamping apparatuses 2. be. For example, FIG. 10 shows an example in which two mold clamping devices 2 and two corresponding electric cylinders 6 are arranged line-symmetrically, and two mold clamping devices 2 are arranged on a pair of transfer rails 10. showing. In this case, by alternately moving the centers of the molds attached to the two mold clamping devices 2 to the drop point P of the parison by the electric cylinders 6, it is possible to continuously clamp the molds. When the molding apparatus 1 is configured as described above, it is required to transfer the mold clamping apparatus 2 at high speed. In this regard, in the molding apparatus 1 of the present invention, the electric cylinder 6 is used as the transfer means for the mold clamping device 2, and the electric cylinder 6 is provided with the brake motor 60 and the slip clutch 80. As shown in FIG. Therefore, even if the electric cylinder 6 is rapidly accelerated or decelerated for high-speed transfer, it is possible to prevent the motor 61 from being overloaded.

<Modification>
The present invention can also be implemented in the following modes.
- In the above-described embodiment, the deburring device 100 of the molding apparatus 1 is configured to use the swinging member 103 shown in FIGS. 9A to 9D. However, as shown in FIGS. 11A to 11C, the deburring device 100 may be constructed by a robot arm 101 and a pair of removing pieces 113, and the burr Xb may be removed by hooking the burr Xb on the pair of removing pieces 113. is also possible. Further, as shown in FIGS. 12A to 12C, a robot arm 101 may be used to horizontally move the molded product X, and a pair of vertically arranged removal pieces 113 may hook the burr Xb. In either case, the removed burr Xb falls in the direction opposite to the moving direction of the robot arm 101 .
In the above embodiment, the slide driving means 31 of the mold clamping driving means 30 of the mold clamping device 2 was configured to be driven by the mold clamping servomotor 32. may be used. Further, the configuration of the toggle mechanism 41 of the mold clamping driving means 30 is not limited to that of the above embodiment. For example, in the above embodiment, the toggle mechanism 41 has two systems of each configuration such as the first toggle link 42 and the second toggle link 43, but it is also possible to have only one system. Further, in the above embodiment, the toggle links 42 and 43 are configured to operate within a plane perpendicular to the horizontal plane, but may be configured to operate within a plane parallel to the clamping direction. It may be configured to The toggle mechanism 41 and the mold clamping driving means 30 including the toggle mechanism 41 may have any configuration as long as the clamping force due to mold clamping can be obtained.
- In the above-described embodiment, the brake 62 of the brake motor 60 of the electric cylinder 6 is of the spring closed type, that is, the non-excited type.
- In the above-described embodiment, the electric cylinder 6 includes both the brake motor 60 and the slip clutch 80 . However, the molding apparatus 1 of the present invention may be configured such that the electric cylinder 6 includes only one of the brake motor 60 and the slip clutch 80 . If either the brake motor 60 or the slip clutch 80 is provided, it is possible to reduce the load on the motor 61 during transfer of the mold clamping device 2 (especially during acceleration/deceleration).
- In the above embodiment, the electric cylinder 6 has the slip clutch 80 as a clutch, but the present invention is not limited to this. That is, other clutches such as an electromagnetic clutch can be used as long as the load (torque) on the motor 61 is reduced.

Reference Signs List 1: molding device 2: mold clamping device 6: electric cylinder 10: transfer rail 11: extrusion device 11h: head 21: movable table 21a: guide block 21b: through hole 22: mold clamping rail 23: first platen 23a: guide block 23d: fixed member 24: second platen 24a: guide block 24b: bracket 24c: pin 24d: fixed member 25: third platen 25a: guide block 25b: bracket 25c: pins 26 to 29: tie bar 30: mold clamping drive means 31 : Slide driving means 32 : Mold clamping servomotor 33 : Ball screw 34 : Ball nut 41 : Toggle mechanism 42 : First toggle link 43 : Second toggle link 44 : Auxiliary link 45 : Connecting members 46 to 48 : Pin 50 : Mold clamping reference surface holding means 51 : Pinion holding member 52 : Pinion 53 : First rack 53a : Teeth 54 : Second rack 54a : Teeth 60 : Brake motor 61 : Motor 61a : Output shaft 62 : Brake 70 : Reducer 80 : Slip clutch 90 : Ball screw mechanism 91 : Ball screw 92 : Nut 93 : Rod 93a : Fixed part 94 : Outer cylinder 100 : Deburring device 101 : Robot arm 102 : Support member 103 : Swing member 103a : Arm 103b : Rotating shaft 113: removed piece MA: split mold MB: split mold P: drop point S: mold clamping reference plane X: molded product Xb: burr

Claims (5)

A molding device for molding a molded body,
A pair of mold clamping devices for clamping a parison extruded from one extrusion device to obtain a molded product, a transfer rail for supporting the pair of mold clamping devices in a transferable manner, and the transfer of the pair of mold clamping devices. A pair of electric cylinders that move along the rail,
Each of the mold clamping devices includes first and second platens each holding a mold, and mold clamping drive means for moving the first and second platens closer to and away from each other,
Each of the electric cylinders includes a motor having an output shaft, and a feed screw mechanism for converting rotational motion of the output shaft into linear motion, and further includes the following configurations (1) and (2). ,
A molding apparatus according to claim 1, wherein the pair of electric cylinders continuously clamp the molds by alternately moving the centers of the molds of the pair of mold clamping devices to drop points of the continuously supplied parisons.
(1) The motor is a brake motor having a brake, and the brake can brake the rotation of the output shaft.
(2) A clutch is provided, and the clutch can switch between a state in which the output shaft and the feed screw mechanism are connected and a state in which the connection between the output shaft and the feed screw mechanism is loosened. Also, the slip clutch is arranged so that the connection between the output shaft and the feed screw mechanism is loosened when excessive torque acts from the feed screw mechanism side to the output shaft side. A molding apparatus according to claim 1, wherein
The mold clamping device includes a third platen connected to the first platen via tie bars,
The mold clamping driving means includes slide driving means and a toggle mechanism,
The molding apparatus, wherein the toggle mechanism connects the second platen and the third platen, and causes the second and third platens to approach and separate from each other by driving the slide driving means. A molding apparatus according to claim 2,
The toggle mechanism includes a pair of first toggle links, a pair of second toggle links, a pair of auxiliary links, and a connecting member,
one end side of the first toggle link is rotatably connected to the third platen;
the other end of the first toggle link is rotatably connected to one end of the second toggle link;
The other end side of the second toggle link is rotatably connected to the second platen,
one end of the auxiliary link is rotatably connected to the first toggle link;
the other end sides of the pair of auxiliary links are rotatably connected to the connecting member,
The molding apparatus, wherein the slide driving means is configured to move the connecting member in a mold clamping direction. A molding apparatus according to claim 3,
The mold clamping device includes a mold clamping rail and a mold clamping reference surface holding means,
The mold clamping rails horizontally movably support the first to third platens,
The molding apparatus according to claim 1, wherein the mold clamping reference plane holding means is configured such that the first and second platens move symmetrically with respect to the mold clamping reference plane of the mold. The molding apparatus according to any one of claims 1 to 4,
The molding device, wherein the transfer rail extends in a direction perpendicular to a mold clamping direction of the mold clamping device.