Die-cast device

Abstract

To provide a die-cast device capable of inhibiting the occurrence of poor appearance on a product to be shaped.SOLUTION: A die-cast device comprises a metal die used to form a cavity 3 having a predetermined shape. The metal die has a slide die and a hold die 21 used to hold the slide die. The slide die has a rear slide die 22 configured to move in a first direction relatively to the hold die 21, and a side slide die 23 configured to move in a second direction intersecting with the first direction. The die-cast device is provided with a regulation part 30 for regulating the side slide die 23 from rotating during a movement in the second direction.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a die casting machine. [Background technology]

[0002] Various die casting machines have been proposed in the past that are equipped with dies arranged opposite to each other so as to be openable and closable, and form a cavity of a predetermined shape inside when closed. For example, in the device described in Patent Document 1, a configuration is disclosed in which one of the dies includes a slide die that forms a cavity and a holding die that holds the slide die, and the slide die includes a rear slide die that is moved in the die opening / closing direction relative to the holding die, and a side slide die that is moved in a direction intersecting the die opening / closing direction. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2009-166073 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the device described in Patent Document 1, if the side slide die is tilted during the removal operation of the side slide die, there is a risk that the side slide die will come into contact with the product being molded, causing defects in the appearance of the product.

[0005] The present invention has been made in consideration of the above circumstances, and has an object to provide a die casting apparatus that can suppress the occurrence of defective appearance of molded products. [Means for solving the problem]

[0006] The die-casting apparatus that solves the above problem is a die-casting apparatus equipped with a mold that forms a cavity of a predetermined shape, the mold includes a slide mold and a holding mold that holds the slide mold, the slide mold includes a first slide mold configured to be movable in a first direction relative to the holding mold, and a second slide mold configured to be movable in a second direction intersecting the first direction, and is equipped with a regulating portion that regulates rotation of the second slide mold when the second slide mold moves in the second direction. Effect of the Invention

[0007] According to the present invention, it is possible to suppress the occurrence of defects in the appearance of a molded product. [Brief description of the drawings]

[0008] [Figure 1] FIG. 2 is a cross-sectional view showing a schematic configuration of a die of the die casting apparatus according to the present embodiment. [Diagram 2] 2 is a cross-sectional view conceptually showing a model of a main part of the mold shown in FIG. 1. [Diagram 3] 4A to 4C are diagrams for explaining the operation of the die casting apparatus according to the present embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an embodiment of a die casting machine will be described with reference to the drawings. Fig. 1 shows a cross-sectional view of a die of the die casting machine according to this embodiment, and Figs. 2 and 3 are cross-sectional views conceptually showing a model of a main part of the die shown in Fig. 1 in order to explain the die casting machine according to this embodiment.

[0010] As shown in FIGS. 1 and 2, the die casting apparatus includes, for example, a fixed die 1, a movable die 2, a plunger device 4, and a pressure reducing means 5.

[0011] The fixed die 1 is attached to a fixed die plate 6. The fixed die 1 carries a sprue bushing 40 which is connected to a plunger sleeve of a plunger device 4. A plunger tip 41 is movably fitted in the plunger sleeve.

[0012] The movable die 2 has a retaining die 21 attached to a movable die plate 7. A clamping means consisting of a hydraulic cylinder, a toggle mechanism, a ball screw mechanism, or the like is connected to the rear surface of the movable die plate 7. The movable die 2 is configured to approach the fixed die 1 and be clamped at a predetermined pressure by the clamping means.

[0013] The holding mold 21 has a first recess 21a formed at the center of the surface facing the fixed mold 1. A rear sliding mold 22 as an example of a first sliding mold is slidably held in the first recess 21a. An actuator 24 that moves the rear sliding mold 22 in a first direction relative to the holding mold 21 is connected between the bottom surface of the first recess 21a and the rear sliding mold 22.

[0014] A plurality of side slide dies 23, which are an example of second slide dies, are slidably disposed around the first recess 21a of the holding die 21. An actuator is connected to each of the side slide dies 23, which moves each of the side slide dies 23 in a second direction perpendicular to the first direction relative to the holding die 21. Each of the side slide dies 23 has a tapered surface 23a, and these tapered surfaces 23a are adjacent to each other.

[0015] The retaining die 21 has a second recess 31 formed at a peripheral position of the surface facing the fixed die 1. The second recess 31 is provided with a restricting portion 30 that restricts the rotation of each of the multiple side slide dies 23 when moving in the second direction. The restricting portion 30 is composed of a piston 32 slidably held in the second recess 31, and a spring 33 provided between the bottom surface of the second recess 31 and the piston 32.

[0016] The plunger device 4 is connected to a sprue bushing 40 supported by the fixed die 1. The plunger device 4 is configured to be movable with a plunger tip 41 fitted in the sprue bushing 40. The plunger device 4 injects molten metal through the sprue bushing 40 into the cavity 3 formed when the fixed die 1 and the movable die 2 are clamped together, thereby filling the cavity 3. When the filled molten metal solidifies, a product P having a predetermined shape corresponding to the shape of the cavity 3 is formed.

[0017] The pressure reducing means 5 is provided in the movable mold 2, and includes a passage 50 communicating with the cavity 3, a switching valve 51 arranged to be able to switch the communication state of the passage 50, an actuator 52 that moves the switching valve 51 between a communication position and a non-communication position, and a vacuum pump connected to the passage 50 to draw a vacuum inside the cavity 3.

[0018] Next, the operation of the die casting apparatus according to this embodiment will be described.

[0019] When molding product P, the die-casting apparatus of this embodiment first moves the rear slide die 22 and the side slide die 23 forward, and then brings the movable die 2 close to the fixed die 1 to close the die and form a cavity 3 inside.

[0020] Next, the die casting device closes the fixed mold 1 and the movable mold 2, which are arranged opposite each other so that they can be opened and closed, and injects molten metal into a cavity 3 of a predetermined shape formed inside, filling it, and molding a product P of the predetermined shape.

[0021] Next, the die casting device moves the rear slide die 22 backward and away from the product P. Remove product P.

[0022] Next, the operation of the die casting apparatus according to this embodiment will be described below, focusing particularly on the operation when the side slide die 23 is moved in the second direction.

[0023] 3, when the side slide die 23 moves in the second direction, the piston 32 presses the side slide die 23 in a direction intersecting the second direction based on the elastic force of the spring 33, and presses the side slide die 23 against the surface of the fixed die 1 facing the movable die 2. This restricts the rotation of the side slide die during the movement in the second direction. As a result, it is possible to prevent the side slide die 23 from coming into contact with the product being molded, thereby preventing the product from having poor appearance.

[0024] The above-described embodiments are intended to facilitate understanding of the present invention, and are not intended to limit the present invention. The present invention may be modified / improved without departing from the spirit thereof, and equivalents are also included in the present invention. That is, those in which a person skilled in the art appropriately changes the design of each embodiment are also included in the scope of the present invention as long as they have the characteristics of the present invention. For example, the elements and their arrangements, materials, conditions, shapes, sizes, etc. of each embodiment are not limited to those exemplified, and can be appropriately changed. In addition, each embodiment is an example, and it goes without saying that partial replacement or combination of the configurations shown in different embodiments is possible, and these are also included in the scope of the present invention as long as they include the characteristics of the present invention. [Explanation of symbols]

[0025] 1...fixed mold, 2...movable mold, 3...cavity, 4...plunger device, 5...pressure reducing means, 6...fixed die plate, 7...movable die plate, 21...retaining mold, 21a...first recess, 22...rear slide mold, 23...side slide mold, 23a...tapered surface, 24...actuator, 30...regulating portion, 31...second recess, 32...piston, 33...spring, 50...passage, 51...switching valve, 52...actuator.

Claims

[Claim 1] A die casting apparatus having a die for forming a cavity of a predetermined shape, The mold includes a slide mold and a holding mold that holds the slide mold, The slide die includes a first slide die configured to be movable in a first direction relative to the holding die, and a second slide die configured to be movable in a second direction intersecting the first direction, a restricting portion that restricts rotation of the second slide die during movement in the second direction; Die casting equipment.

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