JP2003039149A - 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 replacing two pairs of molds D1, D2 into a single die-casting body 10, the carrying in and carrying out of the two pairs of the molds D1, D2 against the die- casting body 10 are conducted by using a dedicated route. The route is constituted by transport rails 21, and the first mold D1 and the second mold D2 are placed on a mold transport stand 22 which moves along the transport rails 21, and by moving of the mold transport stand 22, namely by the shuttle action, the replacing of the mold is conducted. The two pairs of the molds D1, D2 after the molding are constituted so as to make mold-opening in the lateral direction outside the die-casting body 10 after being carried out from the die- casting body 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a die casting apparatus for injecting a molten metal into a die at a high pressure for casting, and more specifically, a plurality of sets of die are alternately exchanged into a single die casting main body to continuously perform casting. The present invention relates to a die casting apparatus and a die replacement method for 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, there has been proposed a die exchange type production system in which a plurality of sets (generally two sets) of dies are exchanged for casting. There is. Such an example is disclosed, for example, in Japanese Examined Patent Publication No. 7-87978 and Japanese Patent Laid-Open No. 6-190526.
It is described in Japanese Patent Publication No. The former Japanese Patent Fair 7-87978
The die casting device described in the publication is a so-called rotary die casting device. This is a plurality of stations in the circumferential direction of the rotary table that rotates around the vertical axis, that is, a station for carrying out and carrying in the mold,
A station for performing mold closing and molten metal injection, and a station for taking out a product and opening a mold for applying a release agent are set. 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 consists of a die-cast main body that performs mold clamping and injection of molten metal, and a mold opening and closing device that opens the mold for product removal and application of a release agent. A transfer device for transferring the mold is arranged. This is to transfer the mold in a loop in the order of one transfer device → die casting body → the other transfer device → die opening / closing device → one transfer device.
This is a method of transferring the mold along a moving path that draws a quadrangle, which is a so-called box-motion transfer method.

[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 device according to claim 1, wherein a plurality of sets of dies are alternately exchanged into a single die-casting body for casting.
It is possible to improve production efficiency as compared with the method of casting using a single mold. In addition, loading and unloading paths for a plurality of sets of dies with respect to the die casting body are provided for each of the dies. That is, since the plurality of sets of dies are loaded and unloaded using their respective dedicated paths, it is possible to set the operation cycle of the dies in units of dies. Therefore, for example, the cycle time can be shortened as compared with a transfer structure of a type in which a plurality of sets of dies are loaded and unloaded using a common path.

Further, since the die after casting, which has been alternately carried out from the die-cast body, is configured to be opened in the lateral direction, 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, for example, it is possible to apply the release agent by spraying to the molding surface after the product is taken out. Can be removed by. Alternatively, for example, a simple processing device such as blowing air onto the molding surface can be attached. Therefore, it is possible to prevent the mixing of metal scraps at the time of the next casting and prevent the generation of defective products, which can reasonably improve the production efficiency.

Further, the die casting apparatus according to the second aspect is characterized in that the die loading path and the die loading path with respect to the die casting body are shared. When such a configuration is adopted, since the so-called shuttle type exchange system is used, the transfer length of the mold can be shortened as compared with a conventional device that transfers a plurality of sets of molds in a loop in one direction. It will be possible. This is effective in reducing the space occupied by the die casting device, or in downsizing and simplification of the device.

According to the third 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 is a plan view showing the outline of the die casting apparatus according to the present embodiment, FIG. 2 is a view taken in the direction of arrow A in FIG.
3 is a sectional view taken along line BB of FIG. 2, FIG. 4 is a view taken in the direction of arrow C of FIG.
FIG. 5 is a view taken in the direction of arrow D in FIG. 4, and FIG. 6 is an operation diagram of two sets of molds. In the die casting apparatus 1 according to the present embodiment, two sets of dies D1 and D2 are alternately exchanged and continuously cast by the die casting main body 10, while product removal after casting and die lubrication are performed on the outside of the die casting main body 10. It is configured to be able to do in.

The first and second molds D1 and D2 used in the present embodiment are laterally open type, and as shown in FIGS. 4 and 5, fixed molds D1a and D2a, which form a pair, The movable molds D1b and D2b are connected to each other by a mold opening cylinder (not shown) for opening and closing the mold. In addition, the fixed dies D1a, D2a and the movable dies D1b, D
2b is provided with sliders 4 on both side surfaces thereof, and a mold transfer table 22 to be described later is provided via the sliders 4.
It is slidably mounted on the guide rails 24 and 25. This will be described later.

The die casting apparatus 1 is provided with a die transfer device 20 for exchanging the first die D1 and the second die D2 with respect to the die casting main body 10 by alternately carrying them in and out. In addition, the die-cast main body 10 is a mold D that has been loaded.
After the molds 1 and D2 are clamped, the molten metal is injected into the molds D1 and D2. As shown in FIGS. 1 to 3, the back surfaces of the molds D1 and D2 in the closed state are pressurized to lateral direction. A mold clamping device for clamping the mold from and a melt injection device (not shown) for injecting the melt into the cavities of the molds D1 and D2 from the vertical direction (lower side) are provided. In the drawing, as a mold clamping device, a pair of left and right die plates 10a and 10b and a tie bar 10 are used.
c is shown.

The die transfer device 20 comprises a die casting body 10
On the other hand, in order to alternately carry in and carry out the first mold D1 and the second mold D2, one mold transfer table 22 that moves between the inside and the outside of the die casting body 10 and the molds therefor. It is provided with two transfer rails 21 (corresponding to the carry-in and carry-out paths in the present invention) fixed to a machine base (not shown) for guiding the movement of the die transfer table 22. As shown in FIG. 1, the transfer rail 21 passes between the die plates 10a and 10b of the die casting body 10 and the die casting body 1
It extends horizontally to the outside on both sides of 0. That is, the transfer rail 21 is arranged over the inside and the outside of the die casting body 10. The mold transfer table 22 has a slider 23 on the lower surface side.
It is slidably mounted on the transfer rail 21 via the carrier 3. Then, although not shown in the figure, the transfer rail 21 is reciprocated by a driving device such as a cylinder.

On the die transfer table 22, two sets of guide rails 24 and 25 for the first die D1 and the second die D2 are provided. The guide rails 24 and 25 are arranged in a direction orthogonal to the transfer rail 21. That is, two guide rails 24 for the first mold D1 are arranged on one side and two guide rails 25 for the second mold D2 are arranged on the other side in the moving direction of the mold transfer table 22. There is. Then, the first die D1 is placed on the guide rail 24 for the first die D1, and the second die D2 is placed on the guide rail 25 for the second die D2. Therefore, when the die transfer table 22 is reciprocally moved, as shown in FIGS. 1 and 2, one of the first die D1 and the second die D2 is placed inside the die casting body 10. It is carried in, and the other is outside the die casting body 10 (in FIG. 2,
It will be carried out to the right or left side. The fixed molds D1a and D2a of the first and second molds D1 and D2 are fixed by the mold clamping device (not shown) installed on the mold transfer table 22 except when the mold is clamped. It is fixed to 22.

Thus, the first die D1 and the second die D2 are exchanged by being alternately carried in and out of the die casting main body 10 by the reciprocating movement of the die transfer table 22. , It is a so-called shuttle type mold exchange. Two die opening / closing auxiliary rails 26 and 27 for the first die D1 and the second die D2 are arranged (fixed to the machine base) outside the die casting body 10. The mold opening / closing auxiliary rails 26 and 27 are used for mold opening as shown in FIGS.
When 1 and D2 are carried out to the outside of the die casting main body 10, they are set so as to coincide with the guide rails 24 and 25 of the die transfer table 22 on the same horizontal axis. That is,
In the present embodiment, the path for alternately loading and unloading the two sets of molds D1 and D2 with respect to the die casting body 10 and the path for moving the molds D1 and D2 for opening and closing the mold are U-shaped. It is arranged to make.

Next, the operation of the die casting apparatus 1 according to the present embodiment configured as described above will be described. 6A and 6B are operation diagrams for explaining replacement and opening / closing of the first mold D1 and the second mold D2. FIG. 6A shows the front of the molds D1 and D2, and FIG. (C) shows the right side surface. In FIGS. 1 and 2, a state in which the first die D1 is carried in the die casting body 10 and the second die D2 is carried out to the outside of the die casting body 10 is shown by a solid line. In this state, inside the die casting body 10, the clamp of the fixed die D1a is released by the die clamp device, and in that state, the first die D1 is clamped, the molten metal is injected, and the die is cooled in sequence. On the other hand, outside the die casting body 10, as shown in FIG. 6 (C), FIG. 4 and FIG.
The movable mold D2b of the second mold D2 is pushed out toward the mold opening / closing auxiliary rail 27 side by the cylinder and is laterally opened. Then, in this state, take out the product, apply the release agent,
After the molds are sequentially cleaned by blowing air, the movable mold D2b is pulled by the cylinder and the molds are closed. Setting the mold opening / closing auxiliary rails 26 and 27 in a manner of being divided from the guide rails 24 and 25 reduces the lateral width (width in the mold opening direction) of the mold transfer table 22 including the guide rails 24 and 25. It will be effective in achieving this.

When the predetermined work is completed inside and outside the die casting body 10, the fixed die D1a is clamped by the die clamping device for the first die D1 and the die for the second die D2. The clamp of the fixed die D2a by the clamp device is released. Subsequently, the mold transfer table 22 moves, whereby the first mold D1 is carried out to the outside of the die casting body 10, and the second mold D2 is carried to the inside of the die casting body 10. That is, the entire movement is performed. After that, as in the case of the second mold D2 described above, with respect to the first mold D1, mold opening → product removal →
The operations of coating the release agent, cleaning the die by blowing, and closing the die are sequentially performed, and the casting operation is performed on the second die D2. Then, when each of these operations is completed, the mold transfer table 22 is moved in the opposite direction, and the entire movement is performed. Hereinafter, the above operation is repeated.

As described above, in the present embodiment, the first and second two sets of molds D1 and D2 are alternately exchanged into the single die casting body 10 and cast. As a result, it can be produced with 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 this embodiment, the first die D1 and the second die D for the die casting body 10 are used.
Since the loading and unloading of No. 2 is a shuttle type by reciprocating movement, it is possible to reduce the occupied area in the plane direction as compared with the conventional method of transferring two sets of molds by a loop type.
In addition, since loading and unloading for exchanging the first mold D1 and the second mold D2 are performed using a dedicated route in each set unit, the operation cycle of the molds D1 and D2 is set in the mold unit. It becomes possible to set. Therefore, the cycle time can be shortened as compared with, for example, a configuration in which two sets of molds are transferred using a common path to perform mold replacement.

Further, in the present embodiment, the first and second molds D1 and D2 after casting are carried out from the die casting main body 10 to the outside and then opened laterally.
When the product is taken out, 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. Or mold D1,
It is also possible to attach a simple cleaning device such as cleaning the molding surface by blowing air onto the molding surface of D2. Further, since the replacement of the first mold D1 and the second mold D2 with respect to the die casting body 10 is a shuttle type, for example, when the first mold D1 is replaced (replaced) with a different mold, the second mold D2 Can continue to operate.

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 path for exchanging the mold with respect to the die-casting main body 10 and the moving path for opening and closing the mold are arranged so as to form a U shape, but this is arranged in a Z shape in plan view, That is, the mold opening / closing auxiliary rails 26 and 27 for opening the mold may be changed to a configuration in which the rails extend in mutually opposite directions. The drive device for moving the molds D1 and D2 is not limited to the cylinder, and a ball screw mechanism, a winding transmission mechanism such as a chain or a belt, or a gear mechanism such as a rack and pinion mechanism can be adopted. Also, the mold D
1, D2 through the slider 4 guide rails 24, 2
5 and the mold opening / closing auxiliary rails 26 and 27 are slid, but wheels may be used instead of the slider 4. Further, two sets of molds D1 and D2 are connected to one mold transfer table 22.
Although the structure is such that the molds are placed on top and transferred, a mold transfer table may be set for each mold and the structure may be changed to drive individually.
Further, the mold transfer table 22 may be changed from a type in which it moves on the rail to a hanger type which is suspended on the rail and moves.

[0021]

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 an outline of a die casting apparatus according to an embodiment of the present invention.

FIG. 2 is a view on arrow A in FIG.

FIG. 3 is a sectional view taken along line BB of FIG.

FIG. 4 is a view on arrow C in FIG.

5 is a view on arrow D of FIG. 4. FIG.

6A and 6B are diagrams illustrating the operation of the mold, FIG. 6A shows the front surface of the mold, FIG. 6B shows the left side surface, and FIG. 6C shows the right side surface.

[Explanation of symbols]

1 die casting equipment 10 Die casting body 21 Transport rail 22 Mold transfer table 24, 25 guide rails 26, 27 type opening and closing auxiliary rail D1 1st mold D2 2nd 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 (3)

[Claims] 1. A die-casting device for alternately casting a plurality of sets of dies into a single die-casting body, wherein the loading and unloading paths used for replacing the plurality of sets of dies have respective dies. The die-casting device, which is provided for each of the die-casting bodies and is carried out from the die-casting body, is configured to be opened laterally. 2. The die casting apparatus according to claim 1, wherein the die loading path and the unloading path are combined. 3. A method for exchanging a plurality of sets of dies in a single die casting body by alternately exchanging them, wherein the plurality of sets of dies are die-cast to the die casting body. Each of the steps for exchanging the dies by alternately carrying in and out through a dedicated loading and unloading path provided for each, and a step for laterally opening the die after casting carried out from the die casting body. A method for exchanging a die for a die casting apparatus, comprising: