JP2023044425A - Mold device - Google Patents

Abstract

To provide a mold device that can reduce failures that may occur when a core is set in a mold.SOLUTION: A mold device 1 includes: a stationary mold 11 including a holding part 14 serving as a molding surface of a core and holding the core; a movable mold 12 including a core molding surface 16 and a product molding surface 15; and a switching mechanism 17 for switching a use surface in the movable mold 12 between the core molding surface 16 and the product molding surface 15.SELECTED DRAWING: Figure 1

Description

The present invention relates to a mold apparatus.

Patent Literature 1 discloses a core molding method in which sand is filled into a cavity of a clamped mold from above to form a sand core. The method described in Patent Document 1 includes the steps of clamping the mold from the top and bottom by a mold clamping mechanism, clamping the clamped mold, removing the clamped mold from the mold clamping mechanism, and separating the clamped mold from the mold clamping mechanism. rolling and positioning the mold so that the foundry sand inlet of the mold faces upward.

JP-A-08-187546

However, the technique described in Patent Document 1 fills a mold with core sand and rolls it when manufacturing a hollow core, and can only be used for molding hollow products. In addition, in order to mold a cast product using a normal core, it is necessary to mold the core and set the molded core in the mold. may occur. Therefore, even if the technique described in Patent Document 1 is used, there is a possibility that defects will occur when the core is set in the mold.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a mold apparatus capable of reducing defects that may occur when a core is set in a mold.

One aspect of the present invention for achieving the above object is a fixed mold having a holding portion that serves as a core molding surface and holds the core; a movable mold having a core molding surface and a product molding surface; and a switching mechanism for switching a working surface of the movable mold between the core molding surface and the product molding surface.

According to the mold apparatus according to this aspect, the steps of taking out the core, transporting it, setting it in the mold, etc., are not required. can be reduced.

Advantageous Effects of Invention According to the present invention, it is possible to provide a mold apparatus capable of reducing defects that may occur when setting a core in a mold.

1 is a schematic cross-sectional view showing one configuration example of a mold apparatus according to an embodiment of the present invention, showing a state during core molding; FIG. 1 is a schematic cross-sectional view showing one configuration example of a mold device according to an embodiment of the present invention, showing a state during product molding; FIG. It is a schematic top view which shows the other structural example of the metal mold|die apparatus which concerns on embodiment of this invention. FIG. 4 is a schematic cross-sectional view showing the configuration example of FIG. 3 and showing a state during core molding. FIG. 4 is a schematic cross-sectional view showing the configuration example of FIG. 3 , showing a state at the time of product molding;

A mold apparatus according to an embodiment of the present invention will be described below with reference to the drawings.
1 and 2 are schematic cross-sectional views showing one configuration example of a mold apparatus according to the present embodiment. Here, FIG. 1 is a diagram showing a state during core molding, and FIG. 2 is a diagram showing a state during product molding.

As shown in FIG. 1 , the mold apparatus 1 can include a fixed mold 11 , a movable mold 12 and a switching mechanism (switching means) 17 .

The fixed mold 11 is a mold having a holding portion (holding means) 14 that serves as a molding surface for the core and holds the core. In other words, the holding portion 14 has a molding surface for the core and has a shape capable of holding the molded core as it is. The movable mold 12 is a mold having a core molding surface 16 and a product molding surface 15 .

The switching mechanism 17 is a mechanism for switching the working surface of the movable mold 12 between the core molding surface 16 and the product molding surface 15, and any mechanism may be used as long as such switching is possible.

For example, the switching mechanism 17 may be a rotating mechanism capable of inverting and returning the movable mold 12, and will be described as the rotating mechanism 17 hereinafter. The rotating mechanism 17 is a mechanism capable of rotating the movable mold 12 as indicated by the white arrow by rotating it as indicated by the thick arrow in FIG. 1 and 2, for the sake of convenience, the rotating mechanism 17 is depicted as being separated from the movable mold 12, but in reality, the rotating mechanism 17 mechanically rotates the movable mold 12. It is connected.

In addition, the core molding surface 16 and the product molding surface 15 are formed at positions in the movable mold 12 that can be switched by the rotation mechanism 17, and the product molding surface 16 and the product molding surface 15 are formed as shown in FIGS. 15 can be formed on the back side (opposite side) of core molding surface 16 . Moreover, although an example of molding one core is given, by providing a plurality of sets of the holding portion 14 and the core molding surface 16, it is possible to simultaneously mold a plurality of cores.

The movable mold 12 is not limited to these examples, but is, for example, roughly shaped like a triangular prism. It can also be made into a shape. Furthermore, the movable mold 12 can be formed to have a total of three or more surfaces, one product molding surface 15 and two or more core molding surfaces (not shown). It can also correspond to a plurality of cores to be molded.

In this manner, the mold apparatus 1 molds the core using a part of the product mold (the core molding surface 16 corresponding to the back surface of the product molding surface 15 in the fixed mold 11 and the movable mold 12). has a configuration that allows Of course, since the fixed mold 11 is also used for product molding by the rotation mechanism 17, the product molding surface 13 is formed on the fixed mold 11 as well.

Next, an example of a product molding procedure using the mold apparatus 1 will be described.
First, a fixed mold 11, which is a fixed mold for the core and the product, and a movable mold 12, which is the movable mold for the core and the product, are prepared. ) to form a hollow portion (space) to be the core shaped portion 10 with the holding portion (core molding surface) 14 and the core molding surface 16 facing each other as shown in FIG.

Next, core molding is performed by injecting a core material into the core-shaped portion 10 and hardening it. The core material can be injected by, for example, injection by a die casting machine or by using the hand part of a product handling robot having an extraction mechanism. Further, the core material may contain sand, a binder, additives, etc., but the composition of the core material, such as the type and grain size of the sand, does not matter.

By such a core molding method, the core 10a having the shape of the core shaped portion 10 is molded and held by the holding portion 14 (see FIG. 2). After molding the core 10a, the mold is opened, and as shown in FIG. By facing the product molding surfaces 15, a hollow portion (space) that becomes the product shape portion 20 is formed. Thus, the fixed mold 11 with the core 10a remaining is used as it is. The product shape portion 20 is a hollow portion formed by the core 10 a , the product molding surface 13 (which may include an outer frame portion surrounding the core 10 a in the holding portion 14 ), and the product molding surface 15 .

Next, a product having the shape of the product shape portion 20 is manufactured by pouring the molten metal of the product material into the product shape portion 20 and hardening it, and then performing the mold opening.

To simplify the description, the description is based on the premise that the rotation mechanism 17, which is an example of the switching mechanism, is a mechanism that can only rotate. However, in practice, in order to bring the fixed mold 11 and the movable mold 12 into contact while rotating, the movable mold 12 is provided with a cylindrical contact surface that matches the rotation diameter of the rotating mechanism 17 and the fixed mold 11 must also have a matching contact surface. Similarly, except for the case where the core molding surface 16 is also composed only of a cylindrical contact surface (when the shape of the core other than the contact surface is borne by the shape of the holding portion 14), the molded core 10a When the movable mold 12 is to be rotated as it is, the shape prevents the rotation.

When forming such cylindrical contact surfaces, high precision is required. Therefore, it is preferable to configure the rotation mechanism 17 as follows so that the fixed mold 11 and the movable mold 12 do not need to form such contact surfaces. That is, for example, after molding the core 10a in the core-shaped portion 10 in the state shown in FIG. 1, the rotating mechanism 17 slides the movable die 12 rightward in FIG. 1, and then enters the state shown in FIG. A slide mechanism can be provided so that it can be rotated in this way and again slid to the left in FIG.

As described above, in the present embodiment, the process of taking out the core, transporting it, and setting it in the mold is not necessary, so that the occurrence of defects that can occur when setting the core in the mold is reduced. It becomes possible to let

This effect will be specifically described. In the case where this embodiment is not applied, the core set failure is caused by accumulation of defects and minute defects that occur during the process up to the placement of the core. The above-mentioned intermediate processes include core molding, transportation, removal, placement, etc., and there are concerns about core loss (abnormality in the dimensions of the baseboard portion) and chuck misalignment in each process. On the other hand, the mold apparatus 1 according to the present embodiment is an apparatus capable of molding a core in a product mold. It is possible to abolish the process itself, such as transportation and setting to the mold, which causes problems in setting the core. Therefore, in the present embodiment, it is possible to reduce core set failure that may occur when the core is arranged in the product mold.

Furthermore, in the present embodiment, by eliminating the step of taking out the core from the molding, the baseboard shape does not need to have a reverse slope, so the flexibility of the core shape can be increased. Moreover, in this embodiment, it is possible to deal with a case where a plurality of cores having mutually different shapes are arranged.

Next, another configuration example of the present embodiment will be described with reference to FIGS. 3 to 5. FIG. The configuration example described here is an example in which a stage change mechanism different from the rotation mechanism 17 is used as the switching mechanism, and description of the configuration similar to the configuration example described with reference to FIGS. 1 and 2 is partially omitted.

FIG. 3 is a schematic top view showing another configuration example of the mold apparatus according to this embodiment. FIG. 4 is a schematic cross-sectional view showing the configuration example of FIG. 3, showing how the core is molded, and FIG. 5 is a schematic cross-sectional view showing the configuration example of FIG. 3, showing how the product is molded. FIG. 10 shows.

As shown in FIG. 3, the mold apparatus 3 according to this configuration example can include a fixed die 31, a movable die 32, and a stage change mechanism 37 as an example of a switching mechanism.

The fixed mold 31 is the same as the fixed mold 11, and as shown in FIG. The movable mold 32 includes a core movable mold 32a having a core molding surface 36 shown in FIG. 4 and a product movable mold 32b having a product molding surface 35 shown in FIG.

The changeover mechanism 37 is an example of a mechanism that changes over the working surface of the movable mold 32 between the core molding surface 36 of the movable core mold 32a and the product molding surface 35 of the movable product mold 32b. and any mechanism may be used as long as such changeover is possible.

The stage change mechanism 37 illustrated in FIGS. 3 to 5 is a belt-shaped roller on which the core movable mold 32a and the product movable mold 32b are placed and which can move their positions with respect to the fixed mold 31. etc. The exemplified stage change mechanism 37 is a mechanism for moving the core movable mold 32a and the product movable mold 32b in the directions indicated by the white arrows in FIG. The movable mold 32a for product is moved, and the movable mold 32b for product is moved to the position of the fixed mold 31 when molding the product. The core movable mold 32a and the product movable mold 32b can be operated like slide inserts.

Moreover, although an example of molding one core is given, by providing a plurality of sets of the holding portion 34 and the core molding surface 36, it is possible to mold a plurality of cores at the same time. The movable mold 32 can also include two or more core movable molds 32a having holding portions 34 of different shapes (not shown), so that a plurality of cores to be molded in separate processes can be handled. can also

In this way, the mold device 3 has a configuration capable of molding a core using a part of the product mold (the fixed mold 31 and the core movable mold 32a in the movable mold 32).

Next, an example of a procedure for molding a product using the mold device 3 will be described.
First, a fixed mold 31, which is a fixed mold for the core and the product, and a movable mold 32, which is the movable mold for the core and the product, are prepared. As shown, a hollow portion (space) to be the core shaped portion 30 is formed with a holding portion (core molding surface) 34 and a core molding surface 36 facing each other. Next, core molding is performed by injecting a core material into the core-shaped portion 30 and solidifying it, in the same manner as in the case of the core-shaped portion 10 .

By such a core molding method, the core 30a having the shape of the core shape portion 30 is molded and held by the holding portion 34 (see FIG. 5). After molding the core 30a, the mold is opened, and as shown in FIG. By facing the product molding surface 33 and the product molding surface 35 while being held inside, a hollow portion (space) that becomes the product shape portion 40 is formed. Thus, the fixed mold 31 with the core 30a remaining is used as it is. The product shape portion 40 is a hollow portion formed by the core 30 a , the product molding surface 33 (which may include an outer frame portion surrounding the core 30 a in the holding portion 34 ), and the product molding surface 35 .

Next, a product having the shape of the product shape portion 40 is manufactured by pouring the molten metal of the product material into the product shape portion 40 and solidifying the product, and performing mold opening.

To simplify the description, the description is based on the premise that the changeover mechanism 37 is a mechanism that can move only in the direction indicated by the white arrow in FIG. Actually, however, the core movable mold 32a and the product movable mold 32b are configured to be movable in a direction perpendicular to the direction of the white arrow (horizontal direction in FIG. 3). More specifically, the step change mechanism 37 molds the core 30a in the core shape portion 30 in the state shown in FIGS. After sliding rightward, the positions of the movable product mold 32b and the fixed mold 31 (positions in the vertical direction in FIG. 3) are aligned, and they are slid leftward in FIG. 3 so that the state shown in FIG. A slide mechanism capable of

This configuration example described above also has the same effect as the configuration example described with reference to FIGS. It is possible to reduce the occurrence of defects that may occur when setting the core in the mold and to increase the flexibility of the core shape.

Although the present embodiment has been described above, the above embodiment has the following features.
That is, the mold apparatus 1 (3) according to the above embodiment includes a fixed mold 11 (31) having a holding portion 14 (34) that serves as a molding surface for the core 10a (30a) and holds the core 10a (30a). a movable mold 12 (32) having a core molding surface 16 (36) and a product molding surface 15 (35); and a switching mechanism 17 (37) for switching between the surface 15 (35).

According to the above-configured mold apparatus, there is no need for processes such as taking out the core, transporting it, and setting it in the mold. It becomes possible to let

It should be noted that the present invention is not limited to the above embodiments, and can be modified as appropriate without departing from the scope of the invention. For example, each component included in the mold apparatus according to the above-described embodiment is not limited to those shown in the drawings, and may be provided with the functions described for each component.

Of course, the shape and material of the fixed type and the movable type differ depending on the product to be manufactured, so the shape and material of the product do not matter. Although the movable mold and the switching mechanism have been described as separate structures, since the mechanism for moving the movable mold is the switching mechanism, the mold including the switching mechanism can also be referred to as the movable mold.

Further, the mold apparatus according to the above-described embodiment can constitute a die casting machine together with, for example, an injection apparatus for injecting a core material or an injection apparatus for injecting a product material. Any other configuration is acceptable.

1, 3 mold devices 10, 30 core shaped parts 10a, 30a cores 11, 31 fixed molds 12, 32 movable molds 13, 15, 33, 35 product molding surfaces 14, 34 holding parts 16, 36 core molding surfaces 17 Switching mechanism (rotating mechanism)
20, 40 Product shape part 32a Movable mold for core 32b Movable mold for product 37 Switching mechanism (step change mechanism)

Claims (1)

a fixed mold having a holding portion that serves as a molding surface for the core and holds the core;
a movable mold having a core molding surface and a product molding surface;
a switching mechanism for switching the working surface of the movable mold between the core molding surface and the product molding surface;
A mold device with

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