JPH06190526A - Shuttle type die casting machine - Google Patents

Abstract

PURPOSE:To obtain a die casting machine which continuously casts by alternately using two sets of dies and on the other hand, executes take-out of a product, lubrication of the die and exchange of the die after casting at the outside of the die casting machine body and shortens the casting cycle time to improve the productivity. CONSTITUTION:At the back part of the opposite side of a molten metal supplying device 5 in the vertical type die casting machine body 1 having die clamping press mechanism 1a and molten metal injection mechanism 1b, upper die lifting mechanism 2a and knock-out mechanism 2b are provided. Further, at this back side, a die opening/closing device 2 arranging a die spraying device 6 and a product take-out device 7, is adjacently disposed. Then, at both side parts of the die casting machine body 1 and the die opening/closing device 2, two die shifting carriages 3, 3' shifting between both devices by laying the die (D) and mounting a die side-shifting cylinder 4 for shifting the die (D) into the die casting machine 1 and the die opening/closing device 2 are disposed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a die casting machine used for casting light alloys and the like. More specifically, two pairs of dies are alternately used for casting, and product removal after casting and die lubrication are performed. The present invention relates to a shuttle type die casting machine that can be used outside the die casting machine body.

[0002]

2. Description of the Related Art As is well known, in the die-casting method in which a precision mold is clamped with high force and the molten metal is pushed into the cavity with high pressure, it is possible to mass-produce a complex-shaped casting with a beautiful casting surface and dimensional accuracy. Widely applied to the production of light alloy members. There are various die casting machines to be used, but conventionally, a pair of die is attached to one die casting machine equipped with a die opening / closing mechanism.
A product take-out and die lubrication device was arranged in the vicinity of the die casting machine, and a series of casting steps were performed in the die casting machine, namely, die clamping, molten metal injection, die opening, product ejection, and die lubrication.

However, in the die-casting machine having such a structure, it takes a relatively long time for each casting cycle to make it difficult to improve the productivity. Therefore, in recent years, for example, it is disclosed in Japanese Patent Publication No. 3-5259. As described above, the rotary die casting machine is configured so that a plurality of pairs of molds can be exchanged and sent to one die casting machine, whereby most of a series of casting processes can be separated from the die casting machine body and processed in parallel. Proposed and put to practical use.

This rotary die casting machine
3-5259), as shown in FIG. 4 which is a schematic explanatory view thereof ((a) figure is a top view, (b) figure is a sectional view taken along line AA of (a) figure), A rotary table (42) holding a plurality of pairs of molds (D) allows a mold clamping mechanism (41a) and a molten metal injection mechanism.
The die casting machine body (41) having the (41b) is configured so that the pair of dies (D) are sequentially exchanged and fed. Further, each mold (D) is stored in the mold opening / closing unit (43), then held on the rotary table (42), and sent together with the mold opening / closing unit (43) into the die casting machine body (41). Further, around the rotary table (42), the hot water supply device (44), the mold setup device (45), the product take-out device (46), and the mold lubrication device are arranged at substantially equal intervals along the circumference of the rotary table (42). (47) and insert mounting device (48), etc. are arranged, and under this configuration, a plurality of pairs of molds (D) are sequentially transferred to each device,
A series of casting processes are distributed by each device and performed simultaneously in parallel, which shortens the casting cycle and improves productivity.

[0005]

However, in the above-mentioned conventional rotary die casting machine, since each die is stored in the mold opening / closing unit and the die opening / closing unit is replaced, the die casting machine main body contains the mold opening / closing unit.
In other words, it is necessary to have a stroke that is sufficient to open the mold and take out the product, and to make it large enough to accept a mold opening / closing unit whose height is relatively high.
Since it is necessary to prepare a mold opening / closing unit for each mold, the equipment cost is high and it is not suitable for the production of a large number of kinds of small lots. Furthermore, the mold is moved along the circumference of the rotary table, and each device such as the die casting machine body, the product take-out device, the mold lubrication device, and the mold changing device is installed radially from the center of the rotary table. Therefore, there is also a problem that a vast space is required to install them.

The present invention has been made to solve the above-mentioned problems of the prior art. It is possible to perform continuous casting by alternately using two pairs of molds, and to take out products after casting and perform mold lubrication. Since it can be performed outside the die casting machine body, the casting cycle time can be shortened, and the die can be easily replaced outside the die casting machine body, which is highly responsive to changes in casting product types. An object of the present invention is to provide a shuttle type die casting machine that can compactly install each device to reduce the installation space.

[0007]

In order to achieve the above object, the present invention has the following constitution. That is, a shuttle type die casting machine according to the present invention is a vertical die casting machine body having mold clamping and molten metal injection means, and a die having a product take-out and die lubrication means arranged adjacent to the die casting machine body. Mold opening and closing device,
Two die transfer carts located on both sides of the die-casting machine body and the die opening / closing device, on which a pair of upper and lower dies are placed so as to be movable between the die-casting machine body and the die opening / closing device. And a die traverse device for advancing and retracting the pair of upper and lower dies placed and transferred on the die transfer carriage toward and from the die casting machine body and the die opening / closing device. To do.

[0008]

In the shuttle type die casting machine of the present invention having the above structure, a pair of upper and lower molds are placed on each of the two mold transfer carriages, and the upper and lower molds are connected to the mold transfer carriage and the mold traverse device. Thus, it is possible to transfer between the inside of the die casting machine body and the inside of the mold opening / closing device arranged adjacent to the die casting machine body in a U-shape. Then, the two pairs of upper and lower dies are alternately positioned in the die casting machine body having the die clamping and molten metal injection means and in the die opening and closing device having the product take-out and die lubrication means, whereby the die casting machine body is placed. While performing molten metal casting, that is, mold closing and molten metal injection, in the mold opening and closing device, other processes, that is, mold opening, product removal and mold lubrication can be performed simultaneously in parallel, which shortens the casting cycle time. it can.

Further, the die replacement is carried out on the die transfer carriage.
It can be easily achieved by removing the mold, and the upper and lower molds mounted on one mold transfer carriage can continue the casting, and the mold can be exchanged on the other mold transfer carriage. Exchange efficiency can be improved. Furthermore, the two mold transfer carriages and the mold opening / closing device, and in addition to these, the molten metal supply device can be disposed relatively close to the die casting machine main body, so that these devices can be made compact. It is also possible to collectively reduce the installation space.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. [FIG. 1] and [FIG. 2] are drawings showing a schematic configuration of a shuttle type die casting machine of an embodiment of the present invention, and (a) of [FIG. 1] is a partially cutaway top view. , (B) is a partial cutaway view, and is a view taken along the line AA of (a). 2A is a sectional view taken along line BB of FIG. 1A, and FIG. 2B is an explanatory sectional view of a main part configuration.
The figure is a sectional view taken along the line CC of FIG.

In FIG. 1, reference numeral (1) is a die casting machine body, and the die casting machine body (1) is provided with a mold clamping press mechanism (1a) on an upper portion thereof, and a plunger sleeve and a plunger on a lower portion thereof. With a molten metal injection mechanism (1b) consisting of a chip and a drive cylinder,
It is a vertical type that is widely used for ordinary cold chamber type die casting. Further, a molten metal supply device (5) is arranged in front of the die casting machine body (1), and the molten metal supply device (5) supplies the molten metal to the molten metal injection mechanism (1b) of the die casting machine body (1). It is said that.

(2) is a mold opening / closing device, and this mold opening / closing device (2) is a press having a planar outer shape and a space between each pillars substantially the same as the die casting machine body (1). In a similar form, the upper mold lifting mechanism (2a) for chucking and lifting the upper mold (D1) is provided at the upper part, and the knockout mechanism (2b) is provided at the lower part.
They are arranged at the rear of the die-casting machine body (1) on the opposite side of (5) and adjacent to each other with a small space therebetween.

Further, behind the mold opening / closing device (2),
Mold sprayer with spray nozzles on the top and bottom surfaces of the tip
(6) and the product take-out device (7) in the form of a manipulator are supported coaxially up and down on the same support (P), and each of them has its own center part of the mold opening / closing device (2). It is provided so that it can move back and forth. In addition, the mold spraying device (6) and the product take-out device (7) can be independently swiveled and retracted around the pillar (P), and in particular, the product take-out device (7) can swivel even on a vertical surface. Has been done.

(3) and (3 ') are die transfer carriages, which are
The two die transfer carriages (3) and (3 ') are flat carriages with a substantially rectangular plan shape, and are located on both sides of the die casting machine body (1) and the mold opening and closing device (2). , And two ballways (8) arranged parallel to each other. In addition, this die transfer carriage (3), (3 ') is
As shown in Fig. (a), the central part of the lower end is screwed onto the output screw shaft (9a) of the drive motor (9) of the ballway (8), and the die casting is performed by the operation of this drive motor (9). It can be moved back and forth between the machine body (1) and the mold opening and closing device (2).

Further, the die transfer carriages (3) and (3 ') are provided with die lifter type rollers (10) in parallel to the front and rear portions of the upper surface in the traveling direction and in a direction orthogonal to the traveling direction. At the same time, a die traverse cylinder (4) having a traverse head (4a) at the tip end, which is movable in the inward direction orthogonal to the traveling direction, is mounted on the outer end of the die, while the inner side of the die traverse cylinder (4) is placed. Edge and die casting machine body (1) and mold opening and closing device (2)
It is arranged on the ballway (8) so that it can move back and forth with a slight gap between it and the side edge of the.

The two die transfer carriages (3) and (3 ') have a pair of upper and lower dies (D1) and (D2) on top of each other under the above structure.
A mold opening / closing device (2) placed adjacent to the inside of the die casting machine body (1). ) Transfer to and from inside in a U-shape.

On the other hand, die lock devices (1c) and (2c) are provided on the bolster upper surface on which the die (D) of the die casting machine body (1) and the die opening / closing device (2) is placed, respectively. In the width direction, two die lifter type rollers (11) are provided over the entire width. And the mold transfer carriage (3),
The die (D) laterally fed from (3 ') moves on the die lifter type roller (11) and is fed to the center of the die casting machine body (1) and the die opening / closing device (2). By the operation of the die lock devices (1c) and (2c), they are brought into close contact with and fixed at predetermined positions on the upper surface of each bolster.

Here, the bolster upper surface of the die casting machine body (1) (and the mold opening / closing device (2)) and the upper surfaces of the two mold transfer carriages (3) and (3 ') are as shown in FIG. (a) As shown in the figure, they are located on the same horizontal plane, while the mold transfer cart
The lower die (D2) of the die (D) placed on (3) and (3 ') is connected to the traverse head (4a) of the die traverse cylinder (4). By the operation of the die transverse cylinder (4), the die can be smoothly moved back and forth into the die casting machine body (1) (and the die opening / closing device (2)).

In this embodiment, the die transfer carriage (3),
The lower die (D2) of the die (D) placed on (3 ') and the traverse head (4a) of the die traverse cylinder (4) are connected as shown in Fig. 2.
As shown in Figures (b) and (c), the lower die (D) is inserted into the locking grooves (4b) of U-shaped cross section provided on both sides of the front wall of the transverse head (4a).
The head-equipped pin (12) screwed to both sides of the end face of 2) was engaged to facilitate connection and disconnection between the two. Although not shown in FIG. 1, in this embodiment, a mold loading / unloading device is provided in front of each of the two ballways (8) (on the side of the molten metal supply device (5)). The mold (D) is transferred to the mold transfer carriage (3) via the mold loading / unloading device.
It is supposed to be put on and taken off on (3 ').

Next, the operation of the shuttle type die casting machine of the present embodiment having the above-mentioned structure will be described. First, one die transfer carriage (3) moves the first die (D) to the die casting machine body (1). It is transferred to the inside and set at a fixed position on the bolster by the mold lock device (1c). Then, this mold (D) is closed with high pressure by the mold clamping press mechanism (1a), and at the same time,
The molten metal injection mechanism (1b) is used to press and cast the molten metal into the impression of the mold (D). Next, after a predetermined chill time, the mold is clamped and the lock is released, and the first mold (D) is moved by the mold transfer carriage (3) to the mold opening / closing device (2).
Transfer to.

At the same time, the other die transfer carriage (3 ') is used to move the second die (D) to the die casting machine body.
(1), and as shown in FIG. 1 (b), the second die (D) is used to start the casting process in the same manner as above.

On the other hand, the first transferred to the mold opening / closing device (2)
The mold (D) is set to a fixed position on the bolster by the mold lock device (2c) to fix the lower mold (D2), and (b)
As shown in the figure, the upper die lifting mechanism (2a) allows the upper die (D1)
To open the mold, and then knockout mechanism (2b)
The cast product (M) is extruded from the lower mold (D2) by and is taken out of the machine by the product take-out device (7). Then, move the mold spray device (6) forward,
It is located between (D1) and (D2), and the mold spraying device (6) lubricates the mold. Then, the mold spray device
(6) is retracted, and then the upper die lifting mechanism (2a)
Lower (D1) to close the mold and unlock the mold.

Then, the first die (D) is transferred again into the die casting machine body (1) by one die transfer carriage (3), and in the meantime, the die casting machine body (1) side Then, the second mold (D), which has been casted, is transferred to the mold opening / closing device (2) by the other one mold transfer carriage (3 '), whereby the two molds are paired. Replace (D) and continue casting.

As described above, in the shuttle type die casting machine of this embodiment, two pairs of molds (D) are
The two die transfer carriages (3) and (3 ') transfer the U-shape, and the die casting machine main body (1) and the die opening / closing device (1) are alternately positioned and the die casting machine main body is positioned. In (1), molten metal casting, that is, mold clamping and molten metal injection, is performed, while in the mold opening / closing device (2), other processes, that is, mold opening, product removal, and mold lubrication can be performed simultaneously in parallel. Thus, one die casting machine main body (1) can alternately use two pairs of molds (D) without breaks to shorten the casting cycle time and improve the productivity.

Further, the mold (D) can be replaced by the mold transfer carriage (3),
(3 ') can be easily achieved by loading and unloading onto the mold, and while the die (D) placed on one die transfer carriage (3) continues casting, the other die transfer carriage ( It is possible to perform the mold exchange on the 3 '), which can enhance the efficiency of the mold exchange. Furthermore, the mold opening / closing device (2), the two mold transfer carriages (3), (3 '), and the molten metal supply device (5) are centered around the die casting machine body (3) and relatively close to the periphery thereof. Since these devices can be arranged together, it is possible to combine these devices compactly and reduce the installation space.

In the shuttle type die casting machine of the above embodiment, the die used is a square die whose plane outer shape and dimensions are aligned within a certain range, but the present invention is not limited to this. Instead, for example, when using a die with a planar outer shape different from a square shape such as a disk shape,
In order to support high-mix low-volume production, two pairs of molds with different outer shapes are used, and two kinds of cast products with the same material but different shape dimensions are to be produced in parallel at the same time. 3] As shown, those molds may be placed on the mold transfer carriage via an intermediate bolster having a uniform planar outer shape.

FIG. 3 is a sectional view showing an essential part of a shuttle type die casting machine according to another embodiment of the present invention. In addition,
The shuttle type die casting machine of the present embodiment is different from that shown in FIG. 1 and FIG. 2 except that the mold is directly mounted on the mold transfer carriage instead of being mounted on the mold transfer carriage. This is the same as that of the above-described embodiment shown in FIG. 2, and here, only the cross section of the main part is shown, and the parts equivalent to [FIG. 1] and [FIG. ,
Only the differences will be summarized and explained.

In the shuttle type die casting machine of the present embodiment shown in FIG. 3, each die (D) is adhered and fixed to the upper surface of a flat plate-shaped intermediate bolster (20), and each intermediate bolster (20) is Place on the die transfer carriage (3), and then the die casting machine body
Transfer between the inside of (1) and the inside of mold opening / closing device (2) in a U-shape. Further, each intermediate bolster (20) is provided with a molten metal passage hole (20a) having the same diameter as the inner diameter of the plunger sleeve of the molten metal injection mechanism (1b) of the die casting machine body (1) at the center thereof in the vertical direction. At the same time, the outer shape and size of each plane are aligned within a predetermined range. In addition, a coupling tool (21) is provided on the outer end surface of each intermediate bolster (20), and the mold (D) is fixed on the upper surface of the intermediate transfer bolster (20) so that it can be mounted on the mold transfer carriages (3), (3 '). The placed intermediate bolster (20) is easily connected to the output shaft end of the die lateral transfer cylinder (4) via the connecting tool (21).

In the shuttle type die casting machine of the present embodiment having the above-mentioned configuration, the die casting machine main body It is possible to transfer between the inside of 1) and the inside of the mold opening / closing device (2) in a U-shape, and to set them stably on the upper surface of the bolster. Also,
This facilitates production of a wide variety of products in small lots.

[0030]

As described above, the shuttle type die casting machine according to the present invention can perform continuous casting by alternately using two pairs of molds, and can perform product removal after casting and mold lubrication. It can be performed outside the main body of the die-casting machine, thus shortening the casting cycle time and improving the productivity. Further, the die can be easily exchanged outside the main body of the die-casting machine, the responsiveness to the change of the product type is high, and the installation space can be relatively small, which is excellent in economy.

[Brief description of drawings]

1A and 1B are diagrams showing a schematic configuration of a shuttle type die casting machine according to an embodiment of the present invention, in which FIG. 1A is a partially cutaway top view and FIG. It is an AA arrow line view of the (a) figure shown by notching a part.

FIG. 2 is a drawing showing a schematic configuration of a shuttle type die casting machine according to an embodiment of the present invention, in which FIG.
7A is a cross-sectional view taken along the line BB, FIG. 9B is a cross-sectional view illustrating the configuration of the main part, and FIG.

FIG. 3 is a cross-sectional view for explaining an essential part of a shuttle type die casting machine according to another embodiment of the present invention.

FIG. 4 is a schematic explanatory view of a conventional rotary die casting machine.

[Explanation of symbols]

(1) --Die casting machine body (1a) --Clamping press mechanism (1b) --Molten injection mechanism (2) --Mold opening and closing device (2a) --Upper mold moving mechanism (2b) --Knockout Mechanism (3) --Mold transfer carriage (3 ') --Mold transfer carriage (4) --Mold traverse cylinder (4a) --Crossing head (5) --Molten metal feeder (6)- Mold spray device (7) --Product take-out device (8) --Ballway (9) --Drive motor (9a)-Output screw shaft (10)-Die lifter type roller (11)-Die lifter type roller (D) --Mold (D1) --Upper mold (D2) --Lower mold (M) --Casting product

Claims (1)

[Claims] 1. A vertical die casting machine main body having die clamping and molten metal injection means, a die opening / closing device which is arranged adjacent to the die casting machine body, and has a product takeout and die lubrication means, and a die casting machine. Two mold transfer carts located on both sides of the main body and the mold opening / closing device, on which a pair of upper and lower molds are placed and movably arranged between the main body of the die casting machine and the mold opening / closing device, A shuttle comprising a die traverse device for advancing and retracting a pair of upper and lower dies placed and transferred on the die transfer carriage toward and from a die casting machine body and a die opening / closing device. Type die casting machine.