JP2003039152A - Die-casting device and replacing method for mold of the die-casting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a die-casting device effective for rationally realizing enhancement in production efficiency. SOLUTION: In the die-casting device 1 continuously casting by reciprocally carrying in and carrying out two pairs of molds D1, D2 to and from a single die-casting body, the carrying in and carrying out of the two pairs of the molds D1 and molds D2 against the die-casting body 10 are conducted by a hanger type mold transport stand 22 moved along a ceiling rail 21 constituting one (common) moving route. The molds D1, D2 after the molding are constituted so as to be carried out from the die-casting body 10, and thereafter make mold- opening in the lateral direction by first or second mold opening devices 30, 40.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a die casting device for injecting molten metal into a die at high pressure for casting, and more specifically, a plurality of sets of die are continuously exchanged by exchanging (exchange) with a single die casting body. TECHNICAL FIELD The present invention relates to a die-casting apparatus for casting and a method for changing a die of the die-casting apparatus.

[0002]

2. Description of the Related Art Conventionally, for the purpose of improving the production efficiency of casting by a die casting apparatus, a die exchange type production system has been proposed in which a plurality of sets (generally two sets) of dies are alternately exchanged for casting. Has been done. An example of this is
For example, Japanese Patent Publication No. 7-87978 and Japanese Patent Laid-Open No. 6-190.
No. 526. The former Tokuhoku 7-87
The die casting device described in Japanese Patent No. 978 is a so-called rotary die casting device. This is for multiple stations in the circumferential direction of the rotary table that rotates around the vertical axis, namely, a station for carrying out and carrying in the mold, a station for clamping and injecting the molten metal, for taking out the product and applying the release agent. It is the one that sets the station that opens the mold. Then, after the mold carried in at the carry-in / carry-out station is set on the rotary table, the mold is sequentially transferred to the above stations by the rotation of the rotary table, and a predetermined work is performed at the station. On the other hand, the latter die casting apparatus described in Japanese Patent Laid-Open No. 6-190526 is a shuttle type die casting apparatus. This is because the die-casting body that performs mold clamping and molten metal injection and the mold opening and closing device that opens the mold for product removal and release agent application are arranged side by side.
A transfer device for transferring a mold is arranged on each side of both devices. This is to move the mold from one transfer device to the die casting body to the other transfer device to the mold opening and closing device.
One of the transfer devices is transferred in the order of a loop, and is a system in which the mold is transferred along a movement path that draws a quadrangle, which is a so-called box movement transfer type.

[0003]

According to the die-casting apparatus of the system as described above, the production efficiency can be improved as compared with the die-casting apparatus of the type which produces a product by using a set of molds. However, each of the die casting devices described in the above publications is a so-called vertical opening type in which the mold is moved vertically to open the mold. Therefore, after the product is taken out, metal scraps such as burrs may remain in the mold, especially on the lower mold side where the cavity faces upward. The process of removing the residue from the cavity of the lower mold becomes complicated and lacks certainty as the shape of the cavity becomes complicated. When the residue is mixed in at the next casting, a defective product is generated and the yield is reduced, and as a result, the production efficiency is reduced.

The present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to provide a die casting apparatus and a die casting apparatus which are effective in rationally realizing improvement in production efficiency. It is to provide a method of changing the mold.

[0005]

In order to achieve the above object, a die casting apparatus according to the present invention has a structure as described in each claim of the claims. The die casting apparatus according to claim 1, wherein a plurality of sets of dies are replaced with a single die casting main body for casting, and the post-casting dies carried out from the die casting main body are laterally opened. I am trying. Therefore, according to the invention as set forth in claim 1, by exchanging a plurality of sets of dies into a single die casting body and casting, the production efficiency is improved as compared with the method of casting using a single die. It becomes possible to do. Further, in that case, since the die that has been cast and carried out from the die-cast body is laterally opened, metal scraps such as burrs easily fall naturally from the die when the product is taken out. Therefore, it is possible to avoid the metal scraps remaining in the mold, and even if the metal scraps remain in the mold,
It can also be removed, for example, by applying a release agent by spraying after taking out the product.
For this reason, unlike the conventional vertical opening type, it is possible to prevent mixing of metal scraps during the next casting and prevent the generation of defective products, and thereby to rationally improve the production efficiency.

In the die casting apparatus according to the second aspect of the present invention, the delivery path of the die to the die casting main body also serves as the delivery path. When such a configuration is adopted, it becomes possible to set an empty space in the plane direction, for example, on the side opposite to the die carry-in / out direction with respect to the die casting body, as compared with the conventional apparatus. As a result, the space efficiency in the plane direction around the die casting body is improved, which improves the accessibility to the die casting body and facilitates maintenance work such as maintenance inspection and repair.

Further, in the die casting apparatus according to the third aspect, loading and unloading for exchanging a plurality of sets of dies with respect to the die casting main body is performed using one path. As a result, compared with the conventional device, it is possible to obtain a space efficiency in the plane direction around the die casting main body even though the configuration uses a plurality of sets of dies, and facilitate maintenance work such as maintenance inspection and repair. To be achieved.

According to the fourth aspect of the present invention, it is possible to provide a die replacement method for a die casting apparatus which is effective in improving production efficiency and space efficiency.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 are plan views each showing an outline of a mold exchange type die casting device according to the present embodiment. Further, FIG. 4 is a front view showing a mold transfer device that carries the mold in and out of the die casting body, FIG. 5 is a side view of the mold transfer device, and FIG. 6 is a view taken in the direction of the arrow X in FIG. . The die casting apparatus 1 according to the present embodiment alternately replaces two sets of dies D1 and D2 and continuously casts them in the die casting main body 10, while removing products after casting and die lubrication outside the die casting main body 10. It is configured so that

Molds D1 and D2 used in this embodiment
1 is a lateral opening type, and as shown in FIG. 1, a pair of left dies D1a and D2a and right dies D1b and D2b are interconnected by two low pressure cylinders 3 for opening and closing the dies. . Further, each of the molds D1a, D2a, D1b, D2b is provided with sliders 4 on both side surfaces, and is moved on the rails 31, 41, 23 described later outside the die casting body 10 via the sliders 4. . This will be described later.

The die casting apparatus 1 has two sets of molds D1 and D.
A die transfer device 20 for alternately loading and unloading 2 into and from the die casting body 10, and a first die opening device that opens and closes and transfers one (left side in the drawing) die D1 outside the die casting body 10. 30 and the other die (right side in the figure) D
The second mold opening device 40 that opens and closes and transfers 2 is mainly configured. The die casting main body 10 is for injecting molten metal into the molds D1 and D2 after clamping the loaded molds D1 and D2, and pressurizing the back surface of the closed molds D1 and D2. A mold clamping device for clamping the mold from the lateral direction and a molten metal injection device for injecting the molten metal into the cavities of the molds D1 and D2 from the vertical direction (lower side) are provided. In the figure,
As a mold clamping device, a pair of left and right die plates 10a, 1
0b and a tie bar 10c are shown, and a molten metal injection nozzle 10d (see FIG. 4) is shown as a molten metal injection device.

The die transfer device 20 comprises a die casting body 10
On the other hand, two common ceiling-side rails 21 (corresponding to the transfer path for carrying out or carrying in the mold in the present invention) for carrying in and carrying out two sets of the molds D1 and D2 alternately,
The ceiling side rail 21 has a hanger type die transfer table 22 supported in a suspended manner. The two ceiling-side rails 21 are located above the die casting body 10 and on the outside (one side) of the die casting body 10 at a die transfer position (or a die standby position, indicated by reference symbol A in the figure). ) And extends horizontally and parallel to each other. Then, the mold transfer table 22 is moved by a ball screw mechanism 25 having an electric motor 24 as a drive source, whereby the molds D1 and D2 are moved.
Is transferred between the casting position inside the die casting body 10 and the die transfer position A outside the die casting body 10. Further, the mold transfer table 22 includes two relay rails 23 arranged so as to be orthogonal to the ceiling side rail 21. In addition, the ball screw mechanism 25 is the screw shaft 2 attached to the machine base side.
5a and a nut 25b screwed onto the screw shaft 25a and attached to the mold transfer table 22 side.

Outside the die casting main body 10, on the left and right sides with the die transfer position A of the ceiling side rail 21 interposed,
Two left and right ground side rails 31 and 41 used for opening and closing and transferring the molds D1 and D2 are arranged horizontally and in parallel with each other. That is, the ceiling side rail 21 and the ground side rails 31 and 41 are arranged so as to form a T shape in a plan view. The die transfer table 22 is located at the die transfer position A.
When it is moved to, the relay rail 23 provided in the die transfer table 22 is configured to be aligned with the ground side rails 31 and 41 on the same straight line, and here, the die D1 and D2 are transferred (transferred). ) Is to be done.

A first mold opening device 30 is arranged on one ground side rail 31 side (left side in the drawing), and a second mold opening device 40 is arranged on the other ground side rail 41 side (right side in the drawing). It is arranged. Both mold opening devices 30 and 40 are arranged at positions lower than the ground-side rails 31 and 41, respectively, and in a direction parallel to the ground-side rails 31 and 41 via an appropriate supporting member (not shown) on the machine base. It is movably supported by. Then, the first mold opening device 30 is configured to be moved by a ball screw mechanism 33 having an electric motor 32 as a drive source, and has a mold opening position shown by a solid line in FIG.
It moves to and from the die transfer position A shown by the solid line in FIG. The ball screw mechanism 33 is screwed to the screw shaft 33a attached to the machine base side and the screw shaft 33a, and
It is composed of a nut 33b attached to the first mold opening device 30 side.

The second mold opening device 40 is constructed so as to be moved by a ball screw mechanism 43 which uses an electric motor 42 as a drive source. The mold opening position shown by the solid line in FIG. 1 and the mold opening position shown in FIG. It moves to and from the die transfer position A indicated by the solid line. The ball screw mechanism 43 includes a screw shaft 43a attached to the machine base side, and a nut 4 attached to the first mold opening device 40 side while being screwed to the screw shaft 43a.
3b and.

First mold opening device 30 and second mold opening device 4
0 is equipped with mold clamping devices 34 and 44 (simply shown in FIGS. 1 to 3) using a cylinder as a drive source, and clamps the molds D1 and D2 at the mold transfer position A or Unclamp. Further, the first mold opening device 30 and the second mold opening device 40 are provided with high-pressure cylinders 35 and 45 (simply shown in FIGS. 1 to 3) for mold opening. When the mold is opened, the high-pressure cylinders 35 and 45 operate prior to the opening operation of the low-pressure cylinder 3 for opening and closing the mold, and the left and right molds D1a, D2a, D1b, D2.
Initial mold release is performed by applying a strong force to b in the mold release direction.

Next, the operation cycle of the die casting apparatus 1 configured as described above will be described. In the following description, the die D1 on the left side of FIG. 1 is referred to as a first die, and the die D2 on the right side is referred to as a second die. FIG. 1 shows the first and second molds D1 and D2 in a state where the molds are opened. The first die D1 will be described mainly based on FIG. 2, and the second die D2 will be mainly described based on FIG. In the solid line state of FIG. 1, the first mold D1
Is closed by a low pressure cylinder 3 for opening and closing the mold. After that, the first die opening device 30 is moved by the operation of the ball screw mechanism 33, and the first die D1 in the closed state placed on the ground side rail 31 via the slider 4 is indicated by a solid line in FIG. Transfer to the mold transfer position A. At the die transfer position A, the die transfer table 22 is on standby, and the first die D1 is
Transfer from the ground side rail 31 to the relay rail 23 of the die transfer table 22 via the slider 4. After that, the mold clamping device 34 of the first mold opening device 30 operates toward the unclamping side to release the clamp of the first mold D1.

Thus, when the first die D1 is transferred,
The mold transfer table 22 is moved along the ceiling side rail 21 by the operation of the ball screw mechanism 25, and the first mold D1 is carried into the die casting main body 10 as shown by an imaginary line in FIG. In the die cast body 10, after the first mold D1 is loaded,
The die clamping device operates to face the die plates 10a, 1 facing each other.
The left mold D1a and the right mold D1b are laterally pressed by 0b. Then, the molten metal injection nozzle 10d (see FIG. 4) is inserted into the gate formed in the die D1 to inject the molten metal into the cavity, and is cooled, so-called curing is performed. Then, the molten metal injection nozzle 10d is pulled out from the gate and the mold clamping is released.

Then, the mold transfer table 22 is moved to the outside of the die casting body 10 along the ceiling rail 21 by the operation of the ball screw mechanism 25, and the first mold D1 after casting is carried out to the mold transfer position A. To do. At the die transfer position A, the die clamp device 3 of the first die opening device 30 in standby.
4 operates to clamp the first mold D1. After that, the first mold opening device 30 moves to the mold opening position, and the first mold D1
Is transferred to the mold opening position. During the transfer of the first mold D1, the high-pressure cylinder 35 for mold opening operates to separate the right mold D1b from the left mold D1a, and subsequently, the low-pressure cylinder 3 for mold opening / closing operates to move the left mold. D1a and right type D
1b and 1b are opened at a predetermined interval. That is, the first mold D1 completes the mold opening operation during its transfer. After opening the mold, the product is taken out from the first mold D1,
Further, after the product is taken out, the release agent is applied to the first mold D1 by spraying. Thus, the state shown in the solid line in FIG. 1 is returned to the initial state.

As described above, when the first mold D1 is pulled out from the mold transfer table 22 by the first mold opening device 30, the second mold opening device 40 in standby operates. That is, the second mold opening device 40 that clamps the second mold D2 moves by the operation of the ball screw mechanism 43, and as shown by the solid line in FIG. 3, the mold D2 on the ground side rail 41 is transferred to the mold. Transfer to position A. At the die transfer position A, the die transfer table 22 that has sent out the above-mentioned first die D1 is on standby, and the second die D2 is transferred from above the ground side rail 41 via the slider 4. Transfer to the relay rail 23 of the table 22. In this case, the second mold opening device 40 includes the mold transfer table 22.
Go under. This is based on a request that the first die D1 and the second die D2 be carried into the die casting body 10 in the same direction.

The subsequent operation of the second die D2 is similar to that of the first die D1 described above. That is, the second mold D2 is carried into the die casting main body 10 by the mold transfer table 22 and cast, as shown in phantom in FIG.
After the casting, it is again carried out to the mold transfer position A by the mold transfer table 22. After that, the second mold D2 is clamped by the second mold opening device 40 on standby, and then transferred to the mold opening position. During the transfer, the high pressure cylinder 4 for mold opening is used.
5 and the low-pressure cylinder 3 for opening and closing the mold, the mold is opened laterally. After that, the product is taken out and the release agent is applied.

As described above, in the present embodiment, the first and second sets of the dies D1 and D2 are alternately exchanged with respect to the single die casting body 10 and continuously cast. This makes it possible to produce at a higher efficiency than the type of casting using a single die. The first mold D1 and the second mold D2 can be applied to the production of the same type of product or the production of different types of products.

In this case, in the present embodiment, the loading and unloading of the dies D1 and D2 with respect to the die casting body 10 is a shuttle type in which the route is shared, that is, the reciprocating operation is performed, and the first die D1 is used. The two sets of the second mold D2 and the second mold D2 are exchanged using one path, and the paths are shared. Therefore, as is clear from FIG. 1, a wide empty space S is secured in the plane direction on one side of the die casting body 10, that is, on the side opposite to the side where the loading / unloading paths of the molds D1 and D2 are laid out. It becomes possible. This vacant space S facilitates access to the die cast body 10 by a worker, and can be effectively used as a space for maintenance work such as maintenance inspection and repair.

Further, in the present embodiment, the first and second molds D1 and D2 after casting are carried out from the die casting body 10 and then opened laterally. In the above, metal scraps such as burrs in the molds D1 and D2 easily fall naturally. Therefore, for example, it becomes possible to clean the molding surface by applying a release agent by spraying after taking out the product. If necessary, a simple cleaning device may be attached such that the molding surfaces of the molds D1 and D2 are blown with air to clean the molding surfaces.

Further, in the present embodiment, since each die has a path for opening and closing and transferring the die on the outside of the die casting body 10, for example, the first die D1 is replaced with a different die. In the case of (replacement), the operation of the second mold D2 can be continued.

The present invention is not limited to the above-described embodiments, but can be modified as appropriate without departing from the scope of the invention. For example, in the embodiment, the mold transfer path is formed in the T-shape arrangement, but the arrangement is I-shaped in plan view, that is, the die casting body 1
Alternatively, the first die D1 may be loaded / unloaded from one side with respect to 0, and the second die D2 may be loaded / unloaded from the other side opposite to the first die D1. Further, the ball screw mechanisms 25, 33, 43 as moving means for transferring the molds D1, D2 may be changed to a winding transmission mechanism such as a chain or a belt or a gear mechanism such as a rack and pinion. Further, the molds D1 and D2 are configured to slide on the ground side rails 31 and 41 via the slider 4, but wheels may be used instead of the slider 4. Further, the die transfer table 22 for loading and unloading the dies D1 and D2 with respect to the die casting body 10 may be changed from a hanger (hanging) type to a type that slides or rolls on a rail.

[0027]

As described in detail above, according to the present invention,
It is possible to provide a die casting apparatus and a die replacement method for the die casting apparatus, which can rationally improve the production efficiency.

[Brief description of drawings]

FIG. 1 is a plan view showing a die casting device according to an embodiment of the present invention.

FIG. 2 is a plan view of a die casting device for explaining the transfer of the first die.

FIG. 3 is a plan view of a die casting device for explaining transfer of a second mold.

FIG. 4 is a front view showing a transfer device for loading / unloading a die to / from a die casting body.

FIG. 5 is a side view showing a transfer device for loading and unloading the dies.

FIG. 6 is a view on arrow X in FIG.

[Explanation of symbols]

1 die casting equipment 10 Die casting body 20 Mold transfer device 21 Ceiling side rail 22 Mold transfer table 23 Relay rail 30 Mold opening device 31 Ground rail 40 Mold opening device 41 Ground rail D1, D2 mold

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Keiji Onoe             2-1, Toyota-cho, Kariya City, Aichi Stock Association             Company Toyota Loom Works (72) Inventor Kazuki Funabashi             2-1, Toyota-cho, Kariya City, Aichi Stock Association             Company Toyota Loom Works

Claims (4)

[Claims] 1. A die casting apparatus, wherein a plurality of sets of dies are replaced with a single die casting main body for casting, and the cast dies carried out from the die casting main body are opened laterally. 2. The die-casting device according to claim 1, wherein the carry-out path of the die with respect to the die-cast body also serves as a carry-in path. 3. The die casting apparatus according to claim 1, wherein loading and unloading for replacing the plurality of sets of dies with respect to the die casting main body is performed using one path. Die casting equipment. 4. A method of exchanging a plurality of sets of dies into a single die casting body for casting, wherein the plurality of sets of dies are alternately loaded into and unloaded from the die casting body. A method of exchanging dies for a die casting apparatus, comprising: a step of exchanging dies; and a step of laterally opening a die that has been cast and carried out from the die casting body.