JPH08300459A - Mold clamping device of blow mold - Google Patents

Abstract

PURPOSE: To provide the mold clamping device of a blow mold capable of synchronously driving mold clamping plates at a position not eccentric with respect to the center line position in the lateral direction of split molds. CONSTITUTION: First and second mold clamping plates 40, 42 having split molds respectively attached thereto and the movable plate 44 arranged at the position on the side opposite to the second mold clamping plate 42 of the first mold clamping plate 40 so as to be slidable in opposed relation to the first mold clamping plate 40 are provided and the first mold clamping plate 40 is supported in a slidable manner through a tie rod and the movable plate 44 and the second mold clamping plates 42 are connected. The center of rotation of a link mechanism 46 consisting of X-shaped link arms 66, 66 is provided at the center position A in the lateral direction of the split molds and both end parts of the link arms 66, 66 are attached at the position of the lateral direction center line A position equal distance of the movable plate 44 and the split molds of the first mold clamping plate 40 in a rotatable manner and the movable plate 44 is made synchronous to the first mold clamping plate 40.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blow mold clamping device, and more particularly to a blow mold clamping device that can perform mold opening / closing and mold clamping without eccentricity.

[0002]

2. Description of the Related Art Heretofore, as a blow type mold clamping device of this type, for example, one disclosed in Japanese Patent Publication No. 5-32211 is known.

In this blow mold clamping device, a pair of split molds constituting a blow cavity mold are attached and fixed to a pair of mold clamping plates slidably opposed to each other on a machine stand, and one mold clamping plate is fixed. A movable plate and a mold clamping plate on the other side that are movably arranged adjacent to each other, are connected and fixed in a state where the one mold clamping plate is penetrated, and a drive device is mounted and fixed on the movable plate. By pressing one mold clamping plate in the mold clamping direction by the device and moving the movable plate in the opposite direction to the one mold clamping plate by the reaction force, the other plate connected to this movable plate through the tie rod The mold clamping plate is moved in the mold closing direction to perform mold closing and mold clamping.

Further, the opening of the blow cavity mold is performed by driving the driving device, which is the reverse of the above operation.

In such a blow-type mold clamping device, when the mold halves are not allowed to reach the mold clamping position at the same time during the mold clamping, the blow mold on one side hits the neck mold or the bottom mold first. Since the neck mold and the bottom mold may be damaged, it is necessary to synchronize the blow cavity mold when the mold is clamped.

Therefore, in such a mold clamping device, the rack and pinion is arranged between one mold clamping plate and the movable plate, and the one mold clamping plate and the movable plate are moved in synchronization with each other. As a result, the split molds are synchronized with each other when the molds are opened and closed.

In the conventional blow type mold clamping device, the rack and pinion is used to synchronize one mold clamping plate and the movable plate. In the case of such a rack and pinion, for example, a pinion is installed on the machine base between one die clamping plate and the movable plate, and a pair of racks are arranged on both sides of the pinion so as to mesh with the pinion. One mold clamping plate and one rack are connected and fixed to the movable plate to synchronize one mold clamping plate and the movable plate.In this case, each rack is Since the pinion is arranged on both sides of the pinion, it is assumed that the pinion is arranged on the extension line of the center position in the width direction of the mold clamping plate or the split mold, or the center position between a pair of tie rods in the width direction of the mold clamping plate. Each la C will be arranged at a position shifted to one side from the extension line of the central position with respect to one of the mold clamping plates and the movable plate, and the driving force of the driving device cannot be transmitted at the central position. Therefore, the mold clamping force at the time of mold clamping of the blow cavity mold is applied at a position eccentric from the central position, and an eccentric load is applied to the rack and pinion, which may damage the rack and pinion. There was a problem that there is.

Particularly, in order to improve productivity, if the number of molded products to be molded at one time is increased, the distance between the tie rods is increased, the mold clamping plate is lengthened, and the tendency to cause the unbalanced load is increased. there were.

Further, in the case of using the rack and pinion, the pinion and the rack must be installed while the pinion and the rack are engaged with each other, and the labor and time required for the installation are required. However, there was a problem that it became complicated.

Further, since it is necessary to form teeth in manufacturing the pinion or the rack, there is a problem that the cost becomes high.

The present invention has been made by paying attention to the above-mentioned conventional problems, and its purpose is to provide a central position in the width direction of a mold clamping plate or a split mold or a center between a pair of tie rods in the width direction of the mold clamping plate. It is an object of the present invention to provide a blow-type mold clamping device that can synchronously drive a mold clamping plate at a position that is not eccentric to the position, can be easily installed, and can keep manufacturing costs low.

[0011]

In order to achieve the above object, the first invention is a blow mold for clamping a blow cavity mold composed of a split mold on a machine base by a driving force of a driving device. In the mold clamping device, at least a pair of slide molds are arranged on the machine base so as to be opposed to each other, and first and second mold clamping plates to which the split molds are attached respectively, and at least a second mold clamping plate with respect to the first mold clamping plate. Of the movable plate disposed on the machine base and the first mold clamping plate so as to be slidable, facing the position opposite to the mold clamping plate of
A plurality of tie rods connected and fixed to the movable plate and the second mold clamping plate and movably supporting the first mold clamping plate between the movable plate and the second mold clamping plate, and a pair of links. An X-shape is formed by rotatably connecting the arms at their center positions, and the center of rotation is on the machine base on an extension line between the pair of tie rods located in the width direction of the first mold clamping plate and substantially at the center position. , The rotation center is attached to be a fulcrum, and both ends of the pair of link arms are equidistant to the movable plate and the first mold clamping plate from the extension line at the substantially central position between the tie rods. A link mechanism that is mounted at a position and that drives the movable plate and the first mold clamping plate in synchronization with each other by the driving force of the driving device.

According to a second aspect of the invention, the driving force of the driving device
In a blow mold clamping device for clamping a blow cavity mold composed of split molds on a machine stand, at least a pair of slidable opposing arrangements are provided on the machine stand, and the first and the first molds are respectively attached with the split molds. 2 mold clamping plate,
A movable plate slidably arranged on the machine base so as to oppose at least a position opposite to the second mold clamping plate with respect to the first mold clamping plate; and the first mold clamping plate. Penetrates and is connected and fixed to the movable plate and the second mold clamping plate,
A plurality of tie rods that movably support the first mold clamping plate between the movable plate and the second mold clamping plate and a pair of link arms are rotatably connected at the central position to form an X-shape. , Both ends of the pair of link arms are mounted on the machine base on an extension line of a substantially central position between a pair of tie rods located in the width direction of the first mold clamping plate, and the rotation center is a fulcrum. A part is attached to the movable plate and the first mold clamping plate at a position equidistant from the extension line of the central position between the pair of tie rods, and links for synchronizing the movable plate and the first mold clamping plate. A mechanism, the driving device is fixed to the movable plate, and
The driving force is transmitted to the mold clamping plate and the reaction force is transmitted to the movable plate.

According to a third aspect of the present invention, in addition to the state of the first aspect or the second aspect, the split mold constituting the blow cavity mold has a plurality of cavity surfaces arranged in an array, and the link mechanism comprises: Both end portions of the link arm are attached to the first mold clamping plate and the movable plate at positions that are equally distant from each other between the pair of tie rods in the substantially central position in the arrangement direction of the cavity surfaces.

In a fourth aspect of the invention, in addition to the state of the first, second or third aspect of the invention, the link mechanism has locus correcting means for converting a rotational movement into a linear movement at both ends of each link arm. The trajectory correcting means is characterized by being engaged with the movable plate and the first mold clamping plate.

[0015]

In the first aspect of the present invention having the above-mentioned structure, the first mold clamping plate slidable between the movable plate and the second mold clamping plate connected via the tie rod, and the movable plate. A link mechanism is provided between the plate and the plate, the center of rotation of which is attached as a fulcrum on an extension line between the pair of tie rods in the width direction of the first mold clamping plate, and the both ends of the link mechanism are respectively provided. The movable plate and the first mold clamping plate are mounted at positions equidistant from the central position between the pair of tie rods, and the movable plate and the first mold clamping plate are synchronized by the driving force of the driving device. Since the driving force can be transmitted from the center position of the die clamping plate of No. 1 at a position where it is not eccentric, there is no eccentric load on the link mechanism and there is no fear of damage.

Further, compared to the case of using the rack and pinion as in the conventional case, in the case of using the link mechanism,
There is no need to adjust the meshing position, etc., and it suffices to set the distance from the position of the parting surface to the center of rotation of the X-shaped link mechanism when the split mold is clamped, and other adjustments are not necessary. It can be easily installed without requiring complicated work.

Further, the drive device is adapted to apply a driving force along the mold clamping direction, while the X-shaped link mechanism moves the movable plate and the first mold clamping plate by this driving force. When the balance is lost, by acting as a restricting force on one side and an increasing force on the other side against the movement,
Since it is designed to be synchronized, the strength of the link mechanism is not so required, so that the structure can be simplified.

Furthermore, in the case of using the link mechanism, it is possible to reduce the manufacturing cost because it is not necessary to process the teeth like the rack and pinion.

In the second aspect of the invention, the drive mechanism is fixed to the movable plate connected to the first mold clamping plate by the link mechanism, and the drive force is transmitted to the first mold clamping plate by the drive device. By transmitting the reaction force to the movable plate, the driving force can be efficiently transmitted with a simple structure, and the mold clamping force can be applied to the split mold at a position where it is not eccentric. Can be installed easily, and the manufacturing cost can be reduced.

According to the third aspect of the present invention, even if the number of molded products to be molded at one time is large, the distance between the tie rods is large, and the mold clamping plate is long, the cavity is formed from the central position between the pair of tie rods. Since the driving force is applied by the link mechanism at positions that are equally spaced in the arrangement direction of the surfaces, no force is applied in the direction in which the mold clamping plate is tilted, preventing an unbalanced load from being applied to the link mechanism, and preventing damage. Can be prevented.

According to the fourth aspect of the present invention, the link mechanism is provided with the trajectory correcting means for converting the rotational drive into the linear motion, whereby the reliable operating state of the link mechanism can be secured.

[0022]

Embodiments of the present invention will now be described in detail with reference to the drawings.

1 to 4 are views showing a blow molding device using a blow mold clamping device according to an embodiment of the present invention.

This blow molding apparatus is for molding a heat-resistant container, and an intermediate molded article which has been blow-molded into a container shape by another blow molding apparatus in advance is carried into the blow molding apparatus to mold the heat-resistant container. And take it out.

In this blow molding apparatus, as shown in FIG. 2, the upper end of a tie rod 12 erected on the machine base 10 is connected and fixed by an upper fixing plate 14, and an upper base 16 is formed below the upper fixing plate 14. The upper base 16 is slidably supported by the tie rods 12, and the upper base 16 can be moved up and down via an elevating drive means (not shown).

A rotary plate 18 is provided on the lower surface of the upper base 16 so as to be rotatable intermittently at a predetermined angle by a rotation driving means (not shown), and is moved up and down as the upper base 16 moves up and down. There is.

On the lower surface of the rotary plate 18, a neck type support plate 2 composed of a split plate for supporting a plurality of (four in the present embodiment) neck molds 20, 20 constituted by split molds so as to be openable and closable.
2, 22 are arranged at a predetermined angle from the center,
With the neck portions supported by the plurality of neck molds 20, 20, a plurality (four in this embodiment) of intermediate molded products are intermittently driven at predetermined angles with the rotation of the rotary plate 18, and the predetermined angular position is obtained. You can stop at.

Further, along the rotation conveyance locus of the rotary plate 18 of the intermediate molded product held by the neck molds 20 and 20, at the stop positions thereof, a supply / unload station, a heat treatment station, and not shown in FIGS. 1 and 2, respectively. A plurality of processing stations such as the blow molding station 24 shown in FIG. 2 are provided so that a heat resistant container can be molded.

At the blow molding station 24, a pair of split molds 26,
A blow cavity mold 28 composed of 26 is arranged so that the mold can be opened and closed by the mold closing device 30 of the blow mold.

Further, on the upper base 16 in the blow molding station 24, four blow core molds 32 can be raised and lowered by a pair of blow core elevating and lowering drive devices 34, 34, and penetrate the upper base 16 and the rotary plate 18. The blow core mold 32 can be inserted into the neck molds 20 and 20, and the blow core mold 32 can be driven when the rotary plate 18 is driven to rotate.
Can be retracted above the position of the rotary plate 18.

Then, the blow cavity mold 28 is clamped by the blow mold clamping device 30 with the blow core mold 32 being inserted into the intermediate molded product held by the neck molds 20, 20, and the intermediate molded product by the blow core mold 32. Blow molding is performed by introducing blow air into four heat-treated intermediate molded products to simultaneously mold four heat-resistant intermediate containers 36 (see FIG. 1).

The blow mold clamping device 30 includes the first and second
The mold clamping plates 40 and 42, the movable plate 44, the four tie rods 45, the link mechanism 46, and the mold clamping drive cylinders 48 and 48 as a driving device.

The first mold clamping plate 40 and the second mold clamping plate 42 are attached to rails 52, 52, 54, 54 arranged in parallel on a pedestal 50 fixed on the machine base 10, respectively. Engaging the more protruding engaging portions 56, 56, 58, 58, the rails 52, 52, 54, 54 are slidably opposed to each other on the machine base 10 via the rails 52, 52, 54, 54, and split molds are provided on the respective opposed surfaces. 26, 26 are attached.

Mounting plates 60, 60 are attached to the rear surfaces of the split molds 26, 26, and are fixed to the first mold clamping plate 40 and the second mold clamping plate 42 via the mounting plates 60, 60. It is like this. In addition, this split mold 26, 26
, Each has four cavity surfaces arranged in the width direction.

A bottom mold 62 is combined with the split molds 26, 26 at the lower portion between the cavity surfaces, and the first mold clamping plate 40 and the second mold clamping plate 4 are combined.
2 is arranged at a position equidistant from the center position of the bottom mold 62.

The movable plate 44 is placed on the rails 52, 52 disposed on the receiving base 50 in a position opposite to the second mold clamping plate 42 so as to be adjacent to and opposed to the first mold clamping plate 40. Engage the engaging portion 64 projecting from the lower portion of the side surface thereof,
It is arranged so that it can slide on.

The four tie rods 45 include the first and second tie rods 45.
The mold clamping plates 40 and 42 and the movable plate 44 are provided so as to penetrate through four corners, and the tie rods 45 are connected and fixed to the movable plate 44 and the second mold clamping plate 42, respectively.
The mold clamping plate 40 of the tie rod 45 is connected between the movable plate 44 and the second mold clamping plate 42 connected by the tie rod 45.
It is movably supported by.

The link mechanism 46 is shown in FIG. 2, FIG. 3 and FIG.
As shown in FIG. 6, the movable plate 44 and the first mold clamping plate 40 are arranged between the movable plate 44 and the first mold clamping plate 40 to synchronize the movable plate 44 and the first mold clamping plate 40. Forming an X-shape that rotatably connects at the center position in the length direction,
The center of rotation is mounted and supported on the receiving base 50 of the machine base 10 via the mounting pin 68, and the mounting pin 68 at the center of rotation serves as a fulcrum.

Further, the center of rotation of the link mechanism 46 by this mounting pin 68 is a pair of tie rods 45, 45 in the width direction of the first mold clamping plate 40 on the machine base 10 side.
Is set on the extension line A of the center position of each link arm 6
Positions of both ends of 6, 66 are equidistant from the position of the extension line A in the width direction of the cavity surface with respect to the movable plate 44 and the first mold clamping plate 40 via the rotary arm 72 as a trajectory correcting means. It is designed to be rotatably attached to.

That is, both ends of each of the link arms 66, 66 are rotatable arms 72 rotatably attached to the lower surfaces of the movable plate 44 and the first mold clamping plate 40 via the mounting pins 70, and the connecting pins 74. Is rotatably connected via the link arm 66, and the loci of both ends of the link arms 66 and 66 are corrected when the rotary motion of the link arm 66 is converted into the slide linear motion of the movable plate 44 and the first mold clamping plate 40. I am trying.

Clamping drive cylinder 48 as a drive device
Are arranged side by side on the movable plate 44, and each of the drive cylinders 48, 48 has a movable plate 44.
Mounted on and fixed to each of the pistons 78, 7
8 penetrates the movable plate 44 and is connected and fixed to the first mold clamping plate 40.

By configuring the mold clamping device as described above, the piston 7 is driven by the mold clamping drive cylinders 48, 48.
When the first mold clamping plate 40 is pressed and moved in the mold clamping direction (arrow B direction) by driving 8, 78, the reaction force against the pressing force of the piston acts on the movable plate 44 to move the movable plate 44. The plate 44 moves in the C direction (arrow direction), and the second mold clamping plate 42 connected to the movable plate 44 via the tie rod 45 also moves in the mold clamping direction (D direction). Become.

In this case, the X-shaped link mechanism 46 rotates the center of rotation of the link mechanism 46 on the machine base 10 to form the pair of tie rods 4.
5 and 45 are supported on an extension line A at a central position, and both ends of each link arm 66, 66 are extended with respect to the movable plate 44 and the first mold clamping plate 40 via the rotating arm 72. Since it is mounted at a position equidistant from the position, the movable plate 4 is placed at a position not eccentric from the position of the extension line A.
4 and the first mold clamping plate 40, and by extension the first mold clamping plate 40.
And the second mold clamping plate 42 can be moved in synchronization with each other, and by driving the pistons 78, 78 in opposite directions by the mold clamping drive cylinders 48, 48,
The first mold clamping plate 40 and the second mold clamping plate 42 can be moved in synchronization with the mold opening direction, and the split molds 26, 2 can be moved.
The mold opening / closing operation of 6 can be reliably performed at a position where the split molds 26, 26 are not eccentric.

Further, when mounting the link mechanism 46, it is only necessary to mount the mounting pins 68, 70 and 74, and since it is not necessary to perform complicated positioning work, the installation work becomes easy and complicated processing is required. Therefore, the cost can be reduced.

Further, since the rotary motion of each link arm 66, 66 can be corrected by the rotation of the rotary arm 72, the movable plate 44 and the first mold clamping plate 40 can be converted into the linear motion in the sliding direction. It is possible to obtain various conversion operations.

Further, in this embodiment, since the number of heat-resistant containers molded by the blow cavity mold 28 at one time is four, the blow cavity mold 28 becomes longer in the width direction and the mold clamping plate becomes longer, Although the tie rods 45 are separated from each other, the driving force is applied by the link mechanism 46 at a position equally apart from the center position between the pair of tie rods 45 in the arrangement direction of the cavity surfaces, so that the mold clamping plate 46 is provided. No force is applied in the direction in which
Uneven load can be prevented from being applied to the link mechanism, and damage can be prevented.

5 to 7 show another embodiment of the present invention.

This embodiment shows a case where two blow cavity molds 28, 28 are arranged in two rows.
First and second mold clamping plates 40 shown in the embodiment of FIG.
In addition to 42, the third mold clamping plate 82 and the fourth mold clamping plate 84 are arranged adjacent to and facing the first and second mold clamping plates 40 and 42.

Movable plate 44 and first to fourth mold clamping plates 4
0, 42, 82 and 84 are connected by four tie rods 86 at the corners and two tie rods 88 at the sides.

The tie rods 86 having four corners are provided on the movable plate 44.
The second mold clamping plate 42 and the fourth mold clamping plate 84 are connected to each other, and the first mold clamping plate 40 and the third mold clamping plate 82 are slidable with respect to the tie rod 86.

Also, the two tie rods 88 on the side are the first
The mold clamping plate 40 and the third mold clamping plate 82 are connected to each other, and the second mold clamping plate 42 is slidable with respect to the tie rod 88.

It should be noted that each of the blow cavity molds 28, 28 is a single container, and one mold clamping drive cylinder 48 is used.

In this state, when the piston 78 is driven by the mold clamping drive cylinder 48 mounted and fixed to the movable plate 44 to move the first mold clamping plate 40 in the mold clamping direction (B direction), the tie rod 88 is formed. Through the first mold clamping plate 4
The third mold clamping plate 82 connected to 0 moves in the mold clamping direction (B direction), and the movable plate 44 has an X-shaped link mechanism 46 (FIG.
(See FIG. 7), the movable plate 4 moves in the direction C in synchronism with the first mold clamping plate 40 and the third mold clamping plate 82.
The second mold clamping plate 42 and the fourth mold clamping plate 84, which are connected to each other via the tie rods 86, are in the mold clamping direction (D direction).
To the mold closing operation, and the piston 78 is driven in the opposite direction by the mold clamping drive cylinder 48, so that the mold opening operation is reliably performed in a synchronized state.

Further, when the mold is clamped, the X-shaped link mechanism 46 can apply the synchronous driving force to the split molds 26, 26 at a position where they are not eccentric.

FIG. 8 shows still another embodiment of the present invention.

In this embodiment, an X-shaped link mechanism 46 for synchronizing the movable plate 44 and the first mold clamping plate 40.
The pin 90 provided on both ends of the link arms 66, 66 constituting the above is used as a locus correcting means provided on the lower surfaces of the movable plate 44 and the first mold clamping plate 40 via, for example, cam followers attached to the pin 90. By engaging with the cam groove 92, the rotational movement of the link arms 66, 66 is converted into the linear sliding movement of the movable plate 44 and the first mold clamping plate 40. In this case, the rotary arm in the above embodiment can be omitted and the number of parts can be deleted.

The present invention is not limited to the above embodiments, but various modifications can be made within the scope of the present invention.

For example, in the above-mentioned embodiment, the blow molding apparatus for raising and lowering the upper base and the rotary plate has been described, but the present invention is not limited to this example, and a blow molding apparatus in which the upper base is fixed or which does not have the upper base is used. Can also be applied.

Further, the case where the intermediate molded product is rotatably conveyed by the rotating plate has been described, but the intermediate plate is not limited to the rotating plate and may be conveyed by using a rotating arm or chain conveying means, or the rotative conveying is not performed. It can also be applied to such a blow molding machine.

Further, as the trajectory correcting means, in addition to the above-mentioned respective embodiments, it is also possible to project a pin from the mold clamping plate and provide a cam groove for engaging with this pin on the link arm side.

[0061]

As described above, according to the first aspect of the present invention, the first mold clamping plate slidable between the movable plate and the second mold clamping plate connected to each other through the tie rods. When,
A link mechanism is provided between the movable plate and the movable plate, the link mechanism having a center of rotation attached as an fulcrum on an extension line at a substantially central position between the pair of tie rods in the width direction of the first mold clamping plate, and both end portions of the link mechanism. The movable plate and the first mold clamping plate at positions equidistant from the central position between the pair of tie rods of the first mold clamping plate, and the movable plate and the first mold clamping plate are synchronized by the driving force of the drive device. Since the driving force can be transmitted from the center position of the first mold clamping plate at a position that is not eccentric, there is no eccentric load on the link mechanism,
This has the effect of eliminating the worry of breakage.

Further, compared to the case of using the rack and pinion as in the conventional case, the case of using the link mechanism,
There is no need to adjust the meshing position, etc., and it suffices to set the distance from the position of the parting surface to the center of rotation of the X-shaped link mechanism when the split mold is clamped, and other adjustments are not necessary. There is an effect that it can be easily installed without requiring complicated work.

Further, the driving device applies a driving force along the mold clamping direction, whereas the X-shaped link mechanism moves the movable plate and the first mold clamping plate by this driving force. When the balance is lost, by acting as a restricting force on one side and an increasing force on the other side against the movement,
Since the tuning is performed, the strength of the link mechanism is not so required, and therefore, there is an effect that the structure can be simplified.

Further, in the case of using the link mechanism, there is an effect that the manufacturing cost can be reduced because it is not necessary to process the teeth like the rack and pinion.

According to the second invention, the driving device is fixed to the movable plate connected to the first mold clamping plate by the link mechanism,
The driving force is transmitted to the first mold clamping plate by this driving device,
By transmitting the reaction force to the movable plate, the driving force can be efficiently transmitted with a simple structure, and the mold clamping force can be applied to the split mold at a position not eccentric to the split mold. There is an effect that it can be installed easily and the manufacturing cost can be reduced.

According to the third invention, even if the number of molded products to be molded at one time is large, the distance between the tie rods is large, and the mold clamping plate is also long, the cavity surface is formed from the central position between the pair of tie rods. Since the driving force is applied by the link mechanism at positions that are equally spaced in the arrangement direction of, the force is not applied in the direction in which the mold clamping plate is tilted, and it is possible to prevent an unbalanced load from being applied to the link mechanism and prevent damage. There is an effect that can be done.

According to the fourth aspect of the present invention, the link mechanism is provided with the locus correcting means for converting the rotational drive into the linear motion, so that there is an effect that the reliable operating state of the link mechanism can be secured.

[0068]

[Brief description of drawings]

FIG. 1 is a front view showing a blow molding device using a mold clamping device of a blow mold according to an embodiment of the present invention.

FIG. 2 is a side view of the blow molding device as viewed from the left side of FIG.

FIG. 3 is a bottom view of a mold open state showing a mounting state of the first and second mold clamping plates and the movable plate of FIGS. 1 and 2, and a link mechanism.

FIG. 4 is a bottom view showing a state in which the mold is closed from the state of FIG.

FIG. 5 is a schematic plan view showing a mold clamping device of a blow mold according to another embodiment of the present invention.

6 is a schematic bottom view of the blow mold clamping device of FIG. 5. FIG.

FIG. 7 is a schematic side view of the blow mold clamping device of FIGS. 5 and 6;

FIG. 8 is a schematic bottom view of a blow mold clamping device according to still another embodiment of the present invention.

[Explanation of symbols]

 10 machine base 26 split mold 28 blow cavity mold 30 blow mold clamping device 40 first mold clamping plate 42 second mold clamping plate 44 movable plate 45,86,88 tie rod 46 link mechanism 48 mold clamping drive cylinder 66 link arm 68 , 70 Mounting pin 72 Rotating arm 74 Connecting pin 82 Third mold clamping plate 84 Fourth mold clamping plate

Claims (4)

[Claims] 1. A blow mold clamping device for clamping a blow cavity mold composed of a split mold on a machine base by a driving force of a drive device, wherein at least one pair is slidably opposed to the machine base. And a first and a second to which the split molds are respectively attached
A mold clamping plate, and a movable plate slidably disposed on the machine base so as to oppose at least a position opposite to the second mold clamping plate with respect to the first mold clamping plate, The movable plate and the second plate are passed through the first mold clamping plate.
A plurality of tie rods that are fixedly connected to the mold clamping plate and movably support the first mold clamping plate between the movable plate and the second mold clamping plate, and a pair of link arms at their center positions. The rotation center is formed in an rotatably connected X-shape, and the rotation center is on the machine base on an extension line of a substantially central position between the pair of tie rods positioned in the width direction of the first mold clamping plate. Attached as fulcrums, both ends of the pair of link arms are attached to the movable plate and the first mold clamping plate at positions equidistant from an extension line of the approximate center position between the tie rods, A blow-type mold clamping device comprising: a link mechanism that synchronously drives the movable plate and the first mold clamping plate by a driving force of a drive device. 2. A blow mold clamping device for clamping a blow cavity mold composed of a split mold on a machine base by a driving force of a drive device, wherein at least one pair is slidably opposed to the machine base. , First and second to which the split molds are respectively attached
And a movable plate that is slidably disposed on the machine base so as to face at least a position opposite to the second mold clamping plate with respect to the first mold clamping plate. The movable plate and the second plate.
A plurality of tie rods that are fixedly connected to the mold clamping plate and movably support the first mold clamping plate between the movable plate and the second mold clamping plate, and a pair of link arms rotate at their center positions. The rotation center is attached to the machine base on an extension line of a substantially central position between a pair of tie rods positioned in the width direction of the first mold clamping plate, and forms a fulcrum. Both ends of the pair of link arms are attached to the movable plate and the first mold clamping plate at positions equidistant from the extension line of the central position between the pair of tie rods,
A link mechanism for synchronizing the movable plate and the first mold clamping plate, wherein the drive device is fixed to the movable plate to transmit a driving force to the first mold clamping plate and move a reaction force thereof. Blow type clamping device characterized by transmitting to a plate. 3. The split mold constituting the blow cavity mold according to claim 1, wherein a plurality of cavity surfaces are formed in an array, and the link mechanism is configured such that both ends of the link arm have the pair of tie rods. A blow mold clamping device, characterized in that it is attached to the first mold clamping plate and the movable plate at positions equally spaced apart from a substantially central position in the arrangement direction of the cavity surface. 4. The link mechanism according to claim 1, 2 or 3, wherein the link mechanism has locus correcting means for converting a rotational movement into a linear movement at both ends of each link arm, and the locus correcting means includes the movable plate. And a blow mold clamping device, wherein the blow mold clamping device is engaged with the first mold clamping plate.