Die casting mold for castability verification, manufacturing method of die casting product for castability verification

Abstract

To provide a die-cast metal mold for verifying castability allowed to evaluate castability from various points of view and a die-cast article for verifying castability made by the die-casting metal mold.SOLUTION: A die-cast metal mold 1 for verifying castability comprises a structure for providing a portion (B) intentionally not to set up a push pin, a structure for measuring a press force applied to the push pin by providing a portion (C) to set up a load cell, a structure for providing rib arrangement asymmetrically in rib-shaped portions 53 formed in an obtained die-cast article 50, the rib-shaped portions 53 being formed closer to and opposite to a gate side, and a structure for providing a draft-changed portion (F) in part of the die cast article 50 as to a draft that is an inclination in die-cast article shape relative to a direction to take out an obtained die cast article 50 from the die-cast metal mold 1.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a die casting mold for verifying castability, Manufacturing method for die-casting products for castability verification This is regarding. [Background technology]

[0002] Conventionally, a die casting apparatus capable of performing a die casting method for obtaining a die cast product by filling a molten metal into a die casting mold in which a cavity is defined by a fixed mold and a movable mold. In the technical field of this type of die casting apparatus, a die casting product for castability verification is obtained by using a die casting mold for castability verification in which a cavity having a shape that allows the castability of the die casting method to be evaluated from the state of the obtained die casting product. For example, the following Patent Document 1 discloses a die casting product as a data plate that can perform multiple types of quality tests simultaneously. According to Patent Document 1, it is said that by using this data plate to obtain a wide range of test data in advance, it is possible to improve the quality of the product and reduce the design risk of the mold. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 2929689 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the data plate disclosed in the above-mentioned Patent Document 1 has a shape significantly different from that of a die-cast product that is actually cast, so there are limitations to the test data that can be obtained. Therefore, the conventional technology represented by the data plate described in Patent Document 1 is insufficient in terms of evaluating castability, and there is still room for further improvement.

[0005] The present invention has been made in consideration of the problems existing in the prior art described above, and an object of the present invention is to provide a die-casting mold for castability verification that can evaluate castability from a wide variety of viewpoints, and a die-cast product for castability verification cast using this die-casting mold. [Means for solving the problem]

[0006] The present invention will be described below. In order to facilitate understanding of the present invention, reference numbers in the accompanying drawings are given in parentheses, but the present invention is not limited to the illustrated forms.

[0007] The die-casting die (1) for verifying castability according to the present invention is a die-casting die (1) for verifying castability, which is provided in a die-casting apparatus capable of performing a die-casting method for obtaining a die-cast product (50) by filling a molten metal (2) into a cavity (1a) of the die-casting die (1) defined by a fixed die (10) and a movable die (20), and which defines a cavity (1a) having a shape that allows the castability of the die-casting method to be evaluated from the state of the obtained die-cast product (50), and which does not require any intentional placement of a push pin. a configuration in which a position (B) where a load cell is installed is provided, a configuration in which the pressing force applied to the push pin is measured by providing a position (C) for installing a load cell; a configuration in which the rib arrangement of the rib shaped portion (53) formed on the obtained die-cast product (50) is asymmetrical on the gate side and the anti-gate side; and a configuration in which a draft angle, which is the inclination of the die-cast product shape with respect to the direction in which the die-cast product (50) obtained from the die-casting mold (1) is removed, is changed in a portion of the die-cast product (50). A structure for forming a plurality of wing-shaped portions (54) in the obtained die-cast product (50), a structure for forming a thick-walled portion (56) in a portion of the obtained die-cast product (50), and a structure for forming a through-hole window-shaped portion (55) in a portion of the obtained die-cast product (50), The present invention is characterized in that it comprises:

[0009] Furthermore, in the die-casting mold (1) for verifying castability according to the present invention, a part of the vane-shaped portion (54) may have an insert structure.

[0010] The method for manufacturing a die-cast product (50) for castability verification according to the present invention is a method for manufacturing a die-cast product (50) for castability verification, which is cast by a die-casting die (1) for castability verification, in which a cavity (1a) of a die-casting die (1) is defined by a fixed die (10) and a movable die (20) to obtain a die-cast product (50) by filling the cavity (1a) with a molten metal (2), and the die-cast product (50) is obtained by a die-casting device capable of performing a die-casting method, in which the cavity (1a) has a shape that allows the castability of the die-casting method to be evaluated from the state of the obtained die-cast product (50). The die-casting die (1) for castability verification is configured to have a location (B) where a push pin is not intentionally placed, and a location (C) where a load cell is placed, thereby measuring the pressing force applied to the push pin. a configuration in which the rib arrangement of the rib shaped portion (53) formed on the obtained die-cast product (50) is asymmetrical between the gate side and the anti-gate side; a configuration in which a draft angle, which is the inclination of the die-cast product shape with respect to the direction in which the die-cast product (50) obtained from the die-casting mold (1), is changed in a part of the die-cast product (50) at a position (F) where the draft angle is changed; a configuration in which a plurality of wing shaped portions (54) are formed in the obtained die-cast product (50); a configuration in which a thick-walled portion (56) is formed in a part of the obtained die-cast product (50); and a configuration in which a window shaped portion (55) that penetrates through the part of the obtained die-cast product (50) are formed, thereby being characterized in that the die-cast product is cast using the die-casting mold (1) for castability verification. Effect of the Invention

[0011] According to the present invention, it is possible to provide a die-casting mold for castability verification that can evaluate castability from a wide variety of viewpoints, and a die-cast product for castability verification cast using this die-casting mold. [Brief description of the drawings]

[0012] [Figure 1] 1 is a cross-sectional view showing an example of the overall configuration of a die casting apparatus equipped with a die casting mold according to an embodiment of the present invention, and particularly shows a state before molten metal is filled. [Diagram 2] 1 is a cross-sectional view showing an example of the overall configuration of a die casting apparatus equipped with a die casting mold according to an embodiment of the present invention, and particularly shows a state after molten metal has been filled. [Diagram 3] FIG. 1 is a diagram showing the external shape of a die-cast product for castability verification cast by the die-casting mold for castability verification according to this embodiment, and in particular shows a perspective view of the front, top, and right side. [Figure 4] FIG. 1 is a diagram showing the external shape of a die-cast product for castability verification cast by the die-casting mold for castability verification according to this embodiment, and in particular, a perspective view showing the back, bottom, and left side surfaces. [Diagram 5] FIG. 2 is a diagram showing the external shape of a die-cast product for castability verification cast by the die-casting mold for castability verification according to this embodiment, and in particular shows a perspective view of the front, right side, and bottom. [Figure 6] FIG. 1 is a diagram showing the external shape of a die-cast product for castability verification cast by the die-casting mold for castability verification according to this embodiment, and in particular, a perspective view showing the back, left side, and top views. [Figure 7] FIG. 1 is a diagram showing the external shape of a die-cast product for castability verification cast by the die-casting die for castability verification according to this embodiment, and in particular, a front view is shown. [Figure 8]FIG. 2 is a diagram showing the external shape of a die-cast product for castability verification cast by the die-casting die for castability verification according to the present embodiment, and in particular, a rear view. [Figure 9] FIG. 2 is a diagram showing the external shape of a die-cast product for castability verification cast by the die-casting mold for castability verification according to the present embodiment, and in particular, a right side view is shown. [Figure 10] FIG. 2 is a diagram showing the external shape of a die-cast product for castability verification cast by the die-casting mold for castability verification according to the present embodiment, and in particular, a left side view. [Figure 11] FIG. 1 is a diagram showing the external shape of a die-cast product for castability verification cast by the die-casting die for castability verification according to this embodiment, and in particular, a plan view is shown. [Figure 12] FIG. 2 is a diagram showing the external shape of a die-cast product for castability verification cast by the die-casting die for castability verification according to the present embodiment, and in particular, a bottom view. [Figure 13] FIG. 13 is a diagram showing the state in which biscuits, runners, etc. are attached to the die-cast product for castability verification according to this embodiment shown in FIGS. 3 to 12, where (a) in the diagram shows a front view and (b) in the diagram shows a left side view. [Figure 14] FIG. 1 is a perspective view for explaining a characteristic configuration of a die-casting die for castability verification according to the present embodiment and a die-cast product for castability verification cast by the die-casting die. [Figure 15] FIG. 1 is a perspective view for explaining a characteristic configuration of a die-casting die for castability verification according to the present embodiment and a die-cast product for castability verification cast by the die-casting die. [Figure 16] FIG. 1 is a perspective view for explaining a characteristic configuration of a die-casting die for castability verification according to the present embodiment and a die-cast product for castability verification cast by the die-casting die. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] Preferred embodiments for carrying out the present invention will be described below with reference to the drawings. Note that the following embodiments do not limit the inventions according to the claims, and all of the combinations of features described in the embodiments are not necessarily essential to the solution of the invention.

[0014] Before describing the die-casting die 1 for castability verification according to this embodiment and the die-cast product 50 for castability verification cast by this die-casting die 1, the overall configuration of a die-casting device capable of casting the die-cast product 50 according to this embodiment will be described with reference to Figs. 1 and 2. Here, Figs. 1 and 2 are cross-sectional views showing an example of the overall configuration of a die-casting device equipped with the die-casting die 1 according to this embodiment, and in particular, Fig. 1 shows a state before the molten metal is filled, and Fig. 2 shows a state after the molten metal is filled. As shown in Figs. 1 and 2, the die-casting die 1 is provided as a main component of the die-casting device that performs the die-casting method.

[0015] The die casting die 1 according to this embodiment has a fixed die 10 including a fixed die 12 and a fixed holder 11, and a movable die 20 including a movable die 22 and a movable holder 21. The fixed die 12 and the movable die 22 define a cavity 1a. The die casting die 1 also has a sleeve 30. The sleeve 30 communicates with the cavity 1a via a biscuit forming section 1b, a runner forming section 1c, and a gate forming section 1d. A plunger tip 31 is also provided in the sleeve 30. The plunger tip 31 can advance and retreat within the sleeve 30. Furthermore, a diverter 40 is provided at the position of the biscuit forming section 1b, which is a position opposite to the forward direction of the plunger tip 31. When the plunger tip 31 advances inside the sleeve 30 and presses the molten metal 2, such as molten aluminum, the molten metal 2 is filled into the cavity 1a through the biscuit forming portion 1b, the runner forming portion 1c, and the gate forming portion 1d, which are the pouring port. By advancing the plunger tip 31 from the state shown in Fig. 1 to the state shown in Fig. 2, the molten metal 2, which has been pressed by the plunger tip 31 and sent through the sleeve 30, collides with the diverter 40. The molten metal 2 that has collided with the diverter 40 is then guided by the diverter 40 to the runner forming portion 1c and the gate forming portion 1d.

[0016] Next, the die-casting mold 1 for castability verification according to this embodiment invented by the present inventors and the die-cast product 50 for castability verification cast using this die-casting mold 1 will be described with reference to Figures 3 to 16.

[0017] Here, Fig. 3 to Fig. 12 are views showing the external shape of the die-cast product for castability verification cast by the die-casting die for castability verification according to this embodiment, in particular, Fig. 3 shows a perspective view showing the front, top and right side, Fig. 4 shows a perspective view showing the back, bottom and left side, Fig. 5 shows a perspective view showing the front, right side and bottom, Fig. 6 shows a perspective view showing the back, left side and top, Fig. 7 shows a front view, Fig. 8 shows a rear view, Fig. 9 shows a right side view, Fig. 10 shows a left side view, Fig. 11 shows a plan view, and Fig. 12 shows a bottom view. Fig. 13 is a view showing a state in which biscuits, runners, etc. are attached to the die-cast product for castability verification according to this embodiment shown in Figs. 3 to 12, and the divided view (a) in the figure shows a front view, and the divided view (b) shows a left side view. Furthermore, Figs. 14 to 16 are perspective views for explaining characteristic configurations of the die-casting die for castability verification according to this embodiment and the die-cast product for castability verification cast by this die-casting die.

[0018] First, the shape of a die-cast product 50 for castability verification cast by the die-casting die 1 for castability verification according to this embodiment will be described with reference to Figs.

[0019] The die-cast product 50 for castability verification in this embodiment is configured to have a flat, approximately rectangular, plate-like base 51 that is elongated in a front view, nine columnar portions 52 that are erected at the four corners and the centers of the four sides of the front side of the flat base 51, as well as extending forward from the center of the approximately rectangular shape, a plurality of rib-shaped portions 53 that are provided as wall surfaces on the front side of the flat base 51, three wing-shaped portions 54 that are formed from the lower left and lower right positions, and the upper right position of the flat base 51, respectively, extending outward to the left and right, a window-shaped portion 55 that is provided by penetrating the base of the connection portion of the wing-shaped portion 54 formed at the upper right position of the flat base 51 with the flat base 51, and a thick portion 56 that is provided to bulge rearward from the upper center position on the back side of the flat base 51.

[0020] The die-cast product 50 for castability verification according to this embodiment shown in Figures 3 to 12 can be cast using the die-casting mold 1 of the die-casting apparatus illustrated in Figures 1 and 2. When casting is completed using the die-casting mold 1, as shown in Figure 13, a biscuit 61, a runner 62, and a gate 63 are formed on the lower side of the die-cast product 50 for castability verification, that is, on the gate side, and a gate 63 and a runner 62 are formed on the upper side of the die-cast product 50 for castability verification, that is, on the anti-gate side. These biscuits 61, runners 62, and gates 63 are formed by the biscuit forming portion 1b, the runner forming portion 1c, and the gate forming portion 1d of the die-casting die 1 shown in Fig. 1 and Fig. 2, and are inevitably formed in the die-casting process when the die-cast product 50 for castability verification is cast by the cavity 1a (note that in Fig. 1 and Fig. 2, the gates 63 and runners 62 that may be formed at the position on the opposite side of the gate, which is the upper side of the cavity 1a, are omitted). Then, as shown in Fig. 13, the biscuits 61, runners 62, and gates 63 that are no longer necessary as a product are cut and removed by a cutting device (not shown) from the shape when casting is completed by the die-casting die 1, thereby obtaining the die-cast product 50 for castability verification according to this embodiment.

[0021] The shape of the die-cast product 50 for castability verification cast by the die-casting die 1 for castability verification according to this embodiment has been described above with reference to Figures 3 to 13. Next, the characteristic configurations of the die-casting die 1 for castability verification and the die-cast product 50 for castability verification cast by this die-casting die 1 will be described with reference to Figures 14 to 16 in addition to the reference drawings.

[0022] First, in the die-casting die 1 for castability verification according to this embodiment, a configuration is adopted in which a portion where a push pin is not intentionally placed is provided. Specifically, push pins are provided at six positions indicated by reference numeral (A) in FIG. 14, while push pins are not provided at three positions indicated by reference numeral (B) in FIG. 14. Incidentally, the three positions indicated by reference numeral (B) in FIG. 14 are positions where push pins should be provided in a general die-casting die. In this way, by adopting a configuration in which a portion (B) where a push pin is not intentionally placed is provided in the die-casting die 1 for castability verification according to this embodiment, the cast die-cast product 50 for castability verification has a shape that is easy to cling to the die for the die-casting die 1 for castability verification. In other words, by adopting a configuration that intentionally worsens the mold release of the die-cast product 50 for castability verification, a product distortion is generated in the die-cast product 50 for castability verification, and the state of the distortion is verified, thereby making it possible to evaluate the castability of the die-casting method.

[0023] In addition, in the die-casting die 1 for castability verification according to this embodiment, a configuration is adopted in which the pressing force applied to the push pin is measured by providing a place for installing a load cell. Specifically, the load cell is installed at two positions indicated by the reference character (C) in FIG. 15. Since the load cell can measure the pressing force applied to the push pin, it is possible to quantify the resistance force when the die-cast product 50 for castability verification is released from the die-casting die 1 for castability verification. If the release resistance force increases, the extrusion resistance increases, resulting in effects such as increased distortion of the product. Therefore, by installing a load cell in the die-casting die 1 for castability verification and grasping the release resistance force, it is possible to evaluate the castability of the die casting method.

[0024] As described above, the die-cast product 50 for castability verification cast by the die-casting die 1 for castability verification according to this embodiment has the rib-shaped portion 53. However, the rib-shaped portion 53 formed on the obtained die-cast product 50 has an asymmetrical rib arrangement between the rib-shaped portion 53 formed on the gate side and the anti-gate side. Specifically, as is clear from FIG. 16, the die-cast product 50 for castability verification according to this embodiment has a configuration in which the rib-shaped portion 53 is formed more in the lower half (region indicated by reference symbol (E) in FIG. 16) than in the upper half (region indicated by reference symbol (D) in FIG. 16) of the front side of the flat base 51. The rib-shaped portion 53 of this embodiment has a configuration in which the rib-shaped portion 53 is formed more in the right region from the vertical center of the front side of the flat base 51 than in the left region. In this way, by adopting an asymmetrical rib arrangement for the rib-shaped portion 53 formed on the die-cast product 50 for castability verification, it is possible to intentionally provide portions in one die-cast product 50 where product distortion is likely to occur and portions where it is unlikely to occur. By intentionally providing portions in one die-cast product 50 with shapes that are affected by product distortion to different degrees, it becomes possible to evaluate the castability of the die casting method.

[0025] In addition, for the die-cast product 50 for castability verification cast by the die-casting die 1 for castability verification according to this embodiment, a configuration was adopted in which a part of the die-cast product 50 is provided with a change in the draft, which is the inclination of the shape of the die-cast product with respect to the direction in which the die-cast product 50 obtained from the die-casting die 1 is taken out. Specifically, the draft of the three rib-shaped parts 53 indicated by the reference symbol (F) in FIG. 16 is set to 1.5°, and the other drafts are generally set to about 3°. By making the draft of the three rib-shaped parts 53 indicated by the reference symbol (F) in FIG. 16 small to 1.5°, it is possible to intentionally provide a shape that is more difficult to remove from the mold and more likely to distort than other parts, and it becomes possible to evaluate the castability of the die casting method.

[0026] Furthermore, for the die-cast product 50 for castability verification cast by the die-casting die 1 for castability verification according to this embodiment, a configuration in which three vane-shaped portions 54 are formed is adopted, as described above. These three vane-shaped portions 54 have a small thickness in the front-rear direction, and therefore are portions through which the molten metal 2 does not easily flow when the die casting method is performed. In other words, in this embodiment, vane-shaped portions 54 with poor molten metal flow are intentionally formed, and the cast state of these vane-shaped portions 54 (for example, the surface properties and internal quality of the product) is observed, thereby making it possible to evaluate the castability of the die casting method.

[0027] In this embodiment, among the configurations forming the three vane-shaped portions 54, some of the vane-shaped portions 54 have an insert structure. By adopting such a configuration, it is possible to create a state in which the surface treatment is changed between the portion in which the insert structure is adopted and the portion in which the insert structure is not adopted in the three vane-shaped portions 54, and it becomes possible to evaluate the castability of the die casting method by observing the comparative casting states (for example, the surface properties of the product).

[0028] Furthermore, for the die-cast product 50 for castability verification cast by the die-casting die 1 for castability verification according to this embodiment, as described above, a configuration is adopted in which the thick-walled portion 56 is formed so as to bulge backward from the upper center position on the back side of the flat base portion 51. This thick-walled portion 56 has a shape that is likely to cause sink marks during casting. In other words, in this embodiment, the thick-walled portion 56 is intentionally formed so that sink marks are likely to occur and the solidification form of the molten metal 2 is different from other portions, and by observing the casting state (for example, the internal quality of the product) of these portions, it becomes possible to evaluate the castability of the die casting method.

[0029] Furthermore, for the die-cast product 50 for castability verification cast by the die-casting die 1 for castability verification according to this embodiment, as described above, a configuration is adopted in which a window-shaped portion 55 is formed penetrating at the base position of the connection portion with the flat base 51 in the vane-shaped portion 54 formed at the upper right position of the flat base 51. Around the window-shaped portion 55, which is a penetrating hole shape, molten metal is difficult to flow, and there is a possibility that the product quality will deteriorate. Thus, in this embodiment, the window-shaped portion 55 that intentionally causes poor molten metal flow is formed, and the cast state (for example, the surface property and internal quality of the product) is observed, thereby making it possible to evaluate the castability of the die casting method.

[0030] The above describes the characteristic configuration of the die-casting die 1 for castability verification according to the present embodiment and the die-cast product 50 for castability verification cast by the die-casting die 1. By using the die-casting die 1 for castability verification according to the present embodiment and the die-cast product 50 for castability verification cast by the die-casting die 1, it is possible to evaluate the castability of the die-casting method. In particular, by casting the die-cast product 50 for castability verification according to the present embodiment using various different molten metals 2 and evaluating and verifying the castability of these die-cast products 50, it is possible to find the optimal conditions of the die-casting method for each of various metal types. In other words, according to the present embodiment, it is possible to provide the die-casting die 1 for castability verification capable of evaluating castability from a wide variety of viewpoints and the die-cast product 50 for castability verification cast by the die-casting die 1.

[0031] Although the preferred embodiments of the present invention have been described above, the technical scope of the present invention is not limited to the scope described in the above embodiments. Various modifications and improvements can be made to the above embodiments.

[0032] For example, the above-described configurations of the die-casting die 1 for castability verification according to the present embodiment and the die-cast product 50 for castability verification cast by the die-casting die 1 are merely examples that the present invention can adopt. Various modifications of the above-described configurations are possible within a range in which similar operational effects can be achieved.

[0033] Furthermore, for example, in the above-described embodiment, the case where the molten metal 2 is molten aluminum or the like has been described as an example, but the molten metal applicable to the present invention can be any type of metallic material.

[0034] It will be apparent from the description of the claims that such modified or improved forms may also be included within the technical scope of the present invention. [Explanation of symbols]

[0035] 1 Die casting mold for castability verification, 1a cavity, 1b biscuit forming portion, 1c runner forming portion, 1d gate forming portion, 2 molten metal, 10 fixed mold, 11 fixed holder, 12 fixed die, 20 movable mold, 21 movable holder, 22 movable die, 30 sleeve, 31 plunger tip, 40 shunt, 50 die casting product for castability verification, 51 flat base portion, 52 columnar portion, 53 rib-shaped portion, 54 wing-shaped portion, 55 window-shaped portion, 56 thick portion, 61 biscuit, 62 runner, 63 gate.

Claims

1. A die casting apparatus capable of carrying out a die casting method in which a die cast product is obtained by filling a molten metal into a die casting die having a cavity defined by a fixed die and a movable die, the die casting die having a cavity defined therein having a shape that allows the castability of the die casting method to be evaluated from the state of the obtained die cast product, A configuration in which a portion where a push pin is not intentionally installed is provided; A configuration in which a place for installing a load cell is provided to measure the pressing force applied to the push pin; In the rib-shaped portion formed in the obtained die-cast product, the rib arrangement of the rib-shaped portion formed on the gate side and the opposite gate side is asymmetrical; A configuration in which a draft angle, which is an inclination of a shape of a die-cast product with respect to a direction in which the die-cast product obtained from a die-casting mold is removed, is changed in a part of the die-cast product; A structure in which a plurality of wing-shaped portions are formed on the obtained die-cast product; A structure in which a thick portion is formed in a part of the obtained die-cast product; A structure in which a window-shaped portion is formed through a part of the obtained die-cast product; A die casting mold for verifying castability, comprising:

2. The die-casting mold for verifying castability according to claim 1, A die-casting mold for verifying castability, characterized in that a portion of the wing-shaped portion has an embedded structure.

3. A method for producing a die-cast product for castability verification, which is cast using a die-casting mold for castability verification, in which a cavity is defined in a die-casting mold by a fixed mold and a movable mold, the cavity being such that the cavity has a shape that allows the castability of the die-casting method to be evaluated from the state of the resulting die-cast product, comprising: The die-casting mold for castability verification is A configuration in which a portion where a push pin is not intentionally installed is provided; A configuration in which a place for installing a load cell is provided to measure the pressing force applied to the push pin; In the rib-shaped portion formed in the obtained die-cast product, the rib arrangement of the rib-shaped portion formed on the gate side and the opposite gate side is asymmetrical; A configuration in which a draft angle, which is an inclination of a shape of a die-cast product with respect to a direction in which the die-cast product obtained from a die-casting mold is removed, is changed in a part of the die-cast product; A structure in which a plurality of wing-shaped portions are formed on the obtained die-cast product; A structure in which a thick portion is formed in a part of the obtained die-cast product; A structure in which a window-shaped portion is formed through a part of the obtained die-cast product; The manufacturing method of a die-cast product for castability verification, characterized in that the die-cast product is cast using the die-casting mold for castability verification.

Images