Die-casting molds and die-casting methods

Abstract

To improve the quality and the productivity of a die cast product.SOLUTION: A die cast mold 10 comprises: a fixed die 21; a movable die 31 advanceable / retreatable in a mold closing / opening direction with respect to the fixed die 21; a slide core 41 movable in a direction intersecting the advancing / retreating direction of the movable die 31; and a float core 51 provided in a cavity 43 formed inside the slide core 41 and movable in a direction having a prescribed angle with respect to the moving direction of the slide core 41. A cavity 61 is defined by the fixed die 21, the movable die 31, the slide core 41, and the float core 51. The die cast mold includes a positioning mechanism 45 capable of positioning the float core 51 in the cavity 43 formed inside the slide core 41.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a die casting mold and a die casting method. [Background technology]

[0002] Conventionally, a die-casting die has been known that includes a fixed die, a movable die that can advance and retreat in the clamping / opening direction relative to the fixed die, a slide core that can move in a direction intersecting the advance and retreat direction of the movable die, and a float core that is provided in a cavity formed inside the slide core and can move in a direction forming a predetermined angle with respect to the moving direction of the slide core, with a cavity being defined by the fixed die, movable die, slide core, and float core. For example, Patent Documents 1 and 2 listed below are prior art documents that disclose conventional die-casting dies that include a float core. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Publication No. 7-26037 [Patent Document 2] Special Publication No. 3-13941 Summary of the Invention [Problem to be solved by the invention]

[0004] However, because the float core provided in the die-casting mold according to the prior art is free to move within the cavity of the slide core except during casting (when the mold is clamped), there is a risk of the float core coming into contact with other parts or the die-cast product, which could cause an abnormality. Specifically, when the cast die-cast product is removed from the mold, the slide core moves away from the die-cast product, and during this movement, the float core, which is free to move within the cavity, moves toward the die-cast product and protrudes, creating the risk of contacting the die-cast product and causing scratches or causing the casting machine to malfunction.

[0005] On the other hand, in the device disclosed in Patent Document 1, a piston ring to prevent burrs from entering is fitted to the float core (floating core) as a means of restricting the movement of the float core (floating core). However, if the clearance between the cavity (recess) and the float core (floating core) is reduced in this way, the movement of the float core (floating core) will always be impaired, which is expected to cause problems such as equipment trouble and reduced productivity.

[0006] Another prior art technique is a die-casting mold that employs a configuration in which a cylinder for driving the float core is provided inside the slide core and this cylinder is connected to the float core. However, while this configuration can prevent unintended movement of the float core, adding equipment such as a cylinder increases the weight of the slide core, which causes problems such as an increase in the size of the slide core drive mechanism.

[0007] The present invention has been made in consideration of the problems existing in the prior art described above, and its purpose is to provide a die-casting mold that uses a simple mechanism to prevent the float core from coming into contact with the die-cast product due to unintended movement during mold closing or mold opening, which could result in scratches on the die-cast product or the casting machine abnormally stopping, thereby enabling improved quality and productivity of die-cast products compared to prior art. [Means for solving the problem]

[0008] The present invention will be described below. In order to facilitate understanding of the present invention, reference numbers in the accompanying drawings are added in parentheses, but the present invention is not limited to the illustrated forms.

[0009] The die-casting mold (10) according to the present invention comprises a fixed mold (21), a movable mold (31) that can advance and retreat in a mold clamping / opening direction relative to the fixed mold (21), a slide core (41) that can move in a direction intersecting the advance and retreat direction of the movable mold (31), and a float core (51) that is provided in a cavity (43) formed inside the slide core (41) and can move in a direction forming a predetermined angle with respect to the moving direction of the slide core (41), and the die-casting mold (10) defines a cavity (61) by the fixed mold (21), the movable mold (31), the slide core (41), and the float core (51), and further comprises a positioning mechanism (4) that can execute positioning of the float core (51) in the cavity (43) formed inside the slide core (41). 5) Equipped with The positioning mechanism (45) is configured to have at least a cylindrical body (46a) provided in the slide core (41), a pin member (46c) provided in the cylindrical body (46a) while being spring-biased within the cylindrical body (46a) and capable of moving back and forth within the cylindrical body (46a), and a recess (54) provided in the float core (51). The float core (51) is pushed out by a push rod (23) when the fixed die (21) and the movable die (31) are clamped together, and is thereby movable within the cavity (43) from the fixed die (21) side to the movable die (31) side. The float core (51) moves within the cavity (43) toward the movable die (31) and the pin member (46c) fits into the recess (54), thereby positioning the float core (51) within the cavity (54). It is characterized by the following.

[0011] Furthermore, in the die-casting mold (10) according to the present invention, the positioning mechanism (75) is configured to include at least an electromagnet (75) provided on the slide core (41), and the electromagnet (75) generates a magnetic force to fix and hold the float core (51), thereby enabling the float core (51) to be positioned within the cavity (43).

[0012] Furthermore, in the die-casting mold (10) according to the present invention, it is preferable that the float core (51) has a cooling passage (55) formed at an eccentric position shifted from the center of the cross section when viewed in a cross section perpendicular to the direction of movement within the cavity (43).

[0013] The present invention also includes a die casting method characterized by performing die casting using the die casting mold (10) described above. [Effects of the Invention]

[0014] According to the present invention, a simple mechanism can be used to prevent the float core from coming into contact with the die-cast product due to unintended movement during mold closing or mold opening, which could result in scratches on the die-cast product or an abnormal shutdown of the casting machine. Therefore, the die-casting mold of the present invention can improve the quality and productivity of die-cast products compared to conventional techniques. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is a diagram showing a schematic view of the overall configuration of a die-casting die according to an embodiment of the present invention, in a clamped state. [Figure 2] 1 is a diagram showing a schematic view of the overall configuration of a die-casting die according to an embodiment of the present invention, in a state where the die is opened. FIG. [Figure 3] 1A and 1B are diagrams showing the detailed configuration of a pin mechanism part that constitutes the positioning mechanism according to the present embodiment, in which (a) shows a bottom view and (b) shows an AA cross section. [Figure 4] FIG. 2 is a view showing a cross section BB in FIG. [Figure 5] 1A and 1B are diagrams for explaining the characteristics of the float core according to the present embodiment, in which FIG. 1A shows the state during casting, and FIG. 1B shows the state after casting has been completed. [Figure 6] FIG. 2 is a vertical cross-sectional view for explaining the features of the float core according to the present embodiment. [Figure 7] 1A to 1C are diagrams for explaining the steps of a die casting method carried out using a die casting mold according to the present embodiment. [Figure 8] 1A to 1C are diagrams for explaining the steps of a die casting method carried out using a die casting mold according to the present embodiment. [Figure 9] 1A to 1C are diagrams for explaining the steps of a die casting method carried out using a die casting mold according to the present embodiment. [Figure 10] 1A to 1C are diagrams for explaining the steps of a die casting method carried out using a die casting mold according to the present embodiment. [Figure 11]1A to 1C are diagrams for explaining the steps of a die casting method carried out using a die casting mold according to the present embodiment. [Figure 12] 1A to 1C are diagrams for explaining the steps of a die casting method carried out using a die casting mold according to the present embodiment. [Figure 13] 1A to 1C are diagrams for explaining the steps of a die casting method carried out using a die casting mold according to the present embodiment. [Figure 14] 1A to 1C are diagrams for explaining the steps of a die casting method carried out using a die casting mold according to the present embodiment. [Figure 15] 1A to 1C are diagrams for explaining the steps of a die casting method carried out using a die casting mold according to the present embodiment. [Figure 16] 1A to 1C are diagrams for explaining the steps of a die casting method carried out using a die casting mold according to the present embodiment. [Figure 17] 1A to 1C are diagrams for explaining the steps of a die casting method carried out using a die casting mold according to the present embodiment. [Figure 18] 1A to 1C are diagrams for explaining the steps of a die casting method carried out using a die casting mold according to the present embodiment. [Figure 19] 1A to 1C are diagrams for explaining the steps of a die casting method carried out using a die casting mold according to the present embodiment. [Figure 20] 1A to 1C are diagrams for explaining the steps of a die casting method carried out using a die casting mold according to the present embodiment. [Figure 21] 1A to 1C are diagrams for explaining the steps of a die casting method carried out using a die casting mold according to the present embodiment. [Figure 22] 1A and 1B are diagrams showing another example of a positioning mechanism provided in the die-casting mold according to the present embodiment, in which FIG. 1A shows the state during casting, and FIG. 1B shows the state after casting has been completed. DETAILED DESCRIPTION OF THE INVENTION

[0016] 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 not all of the combinations of features described in the embodiments are necessarily essential to the solution of the invention.

[0017] First, the basic configuration of a die-casting die 10 according to this embodiment will be described with reference to Figures 1 and 2. Figure 1 is a diagram schematically illustrating the overall configuration of a die-casting die according to this embodiment, showing the die clamped state. Figure 2 is a diagram schematically illustrating the overall configuration of a die-casting die according to this embodiment, showing the die opened state. In the following description, in the plane of Figures 1 and 2, the right direction is defined as the die opening direction, the left direction as the die clamping direction, the upward direction as the upward sliding direction, and the downward direction as the downward sliding direction.

[0018] The die-casting mold 10 according to this embodiment is configured to include a fixed mold 21, a movable mold 31, a slide core 41, and a float core 51.

[0019] 1 and 2, the fixed die 21 has a cavity-forming surface 22 that forms part of the cavity 61 on the surface facing the movable die 31, the slide core 41, and the float core 51. The fixed die 21 also has a push rod 23 for pushing the float core 51 in the mold opening direction when the mold is opened. The push rod 23 is operable by a piston 25 provided in a hydraulic cylinder 24 installed in the fixed die 21, and is capable of reciprocating in both the mold opening direction and the mold clamping direction.

[0020] The movable die 31 is capable of advancing and retreating relative to the fixed die 21 in both the mold clamping direction and the mold opening direction. As shown in FIGS. 1 and 2, the movable die 31 has a cavity-forming surface 32 that forms part of the cavity 61 on the surface facing the fixed die 21. The movable die 31 also has a pressing member 33 for pressing the float core 51, which will be described later. The pressing member 33 is a member that fixes the position of the float core 51 by pressing the float core 51 toward the fixed die 21 (i.e., the mold clamping direction) during casting. The pressing member 33 is operable by a piston 35 provided in a hydraulic cylinder 34 installed in the movable die 31, and is capable of reciprocating in both the mold opening direction and the mold clamping direction.

[0021] The movable mold 31 also has a presser member stopper 36 for fixing the presser member 33 during casting. The presser member stopper 36 is a member that fixes the position of the presser member 33 by clamping the presser member 33 from above and below during casting. The presser member stopper 36 is operable by a piston 35 provided in a hydraulic cylinder 34 installed in the movable mold 31, and is capable of reciprocating in both the upward sliding direction and the downward sliding direction.

[0022] The movable mold 31 is also equipped with a retraction prevention stopper 37 for fixing the slide core 41 during casting. The retraction prevention stopper 37 is a member that fixes the position of the slide core 41 by pushing the slide core 41 toward the fixed mold 21 (i.e., in the mold clamping direction) during casting. The retraction prevention stopper 37 is operable by a piston 35 provided in a hydraulic cylinder 34 installed in the movable mold 31, and is capable of reciprocating movement in both the mold opening direction and the mold clamping direction.

[0023] The movable die 31 also has an ejector pin 38. The ejector pin 38 is a member that functions to push out the die-cast product located on the cavity-forming surface 32 of the movable die 31 and remove the product from the die-casting die 10 when the fixed die 21 and the movable die 31 are opened after casting is completed. When the fixed die 21 and the movable die 31 are opened after casting is completed, the ejector pin 38 moves in the mold clamping direction to push out the die-cast product, and can also move in the mold opening direction to return to its initial position.

[0024] The movable die 31 also has a sensor 39 for detecting the position of the float core 51. For example, a distance sensor using a laser beam or the like can be used as this sensor 39. The float core 51 according to this embodiment has a detection plate 53 that is irradiated with laser beam from the sensor 39, and the sensor 39 detects and measures the distance to the detection plate 53, thereby determining the position of the float core 51. By determining the position of the float core 51 using this sensor 39, it is possible to control the operation of the die-casting die 10 according to this embodiment, detect abnormalities, and so on.

[0025] The slide core 41 is a member that is movable in a direction intersecting the advance / retract direction of the movable die 31, and in this embodiment, is movable in an upward sliding direction and a downward sliding direction. As shown in Figures 1 and 2, the slide core 41 has a cavity-forming surface 42 that forms part of the cavity 61 on the surface facing the fixed die 21.

[0026] A cavity 43 is formed inside the slide core 41, and a float core 51 is installed in this cavity 43. As described above, the float core 51 has a detection plate 53 that is irradiated with laser light from the sensor 39. Furthermore, as shown in Figures 1 and 2, the float core 51 has a cavity-forming surface 52 that forms part of the cavity 61 on the surface facing the fixed mold 21.

[0027] Furthermore, the float core 51 is movable in a direction forming a predetermined angle with respect to the vertical direction, which is the movement direction of the slide core 41. Note that the float core 51 according to this embodiment is movable back and forth in both the mold opening direction and the mold clamping direction, which are directions perpendicular to the vertical direction, which is the movement direction of the slide core 41.

[0028] With the above configuration, in the die-casting die 10 according to this embodiment, the area surrounded by the cavity-forming surface 22 of the fixed die 21, the cavity-forming surface 32 of the movable die 31, the cavity-forming surface 42 of the slide core 41, and the cavity-forming surface 52 of the float core 51 defines a cavity 61, and a die-cast product can be obtained by pouring a molten metal such as an aluminum alloy into this cavity 61. In particular, because the die-casting die 10 according to this embodiment has the slide core 41 and the float core 51, it is possible to obtain die-cast products with complex shapes.

[0029] The basic configuration of the die-casting die 10 according to this embodiment has been described above using FIGS. 1 and 2. However, the die-casting die 10 according to this embodiment has further distinctive features. Therefore, by adding FIGS. 3 to 6 as reference figures, the distinctive features of the die-casting die 10 according to this embodiment will be described. Here, FIG. 3 shows the detailed configuration of the pin mechanism constituting the positioning mechanism according to this embodiment, with subdivision (a) showing a bottom view and subdivision (b) showing an AA cross section. FIG. 4 shows a BB cross section in FIG. 1. FIG. 5 is a diagram illustrating the features of the float core according to this embodiment, with subdivision (a) showing the state during casting and subdivision (b) showing the state after casting. FIG. 6 is a longitudinal cross-sectional view illustrating the features of the float core according to this embodiment.

[0030] 1 and 2, the die-casting mold 10 according to this embodiment is provided with a positioning mechanism 45 that is capable of positioning the float core 51 in the cavity 43 formed inside the slide core 41. This positioning mechanism 45 is composed of a pin mechanism 46 installed in the slide core 41 and a groove-like recess 54 formed in the float core 51.

[0031] 3, the pin mechanism 46 is composed of a cylindrical body 46a provided in the slide core 41, and a pin member 46c provided in the body 46a so as to be able to move forward and backward while being biased by a spring 46b installed in the body 46a. More specifically, as is clear from comparing FIGS. 1 to 3, the pin member 46c constituting the pin mechanism 46 is constantly pushed downward by the elastic force of the spring 46b, and in the state of FIG. 1 where the pin member 46c and the float core 51 are not in contact (i.e., the state during casting), the lower tip of the pin member 46c protrudes into the cavity 43 formed inside the slide core 41 and does not constrain the float core 51.

[0032] On the other hand, when casting is completed and the mold is opened and the float core 51 moves in the mold opening direction, as shown in FIG. 2, the lower tip of the pin member 46c fits into the groove-shaped recess 54 formed in the float core 51. In this state, the pin mechanism 46 restricts the movement of the float core 51 and positions it. Therefore, the positioning mechanism 45 of this embodiment prevents the float core 51 from moving unintentionally within the cavity 43. In other words, this embodiment does not involve the float core 51 moving unintentionally within the cavity 43, which could cause contact with the die-cast product, scratch the die-cast product, or cause the casting machine to malfunction, as in the prior art. Furthermore, it is possible to position and fix the float core 51 using a simple mechanism. Therefore, the die-casting mold 10 of this embodiment can improve the quality and productivity of die-cast products compared to the prior art.

[0033] As shown in Fig. 4, the float core 51 of this embodiment is preferably provided with a cooling passage 55 inside because it comes into contact with the molten metal, which serves as a high-temperature heat source. As shown in Fig. 4, this cooling passage 55 may be a linear cooling passage 55a, or a spiral cooling passage 55b. As a means for providing the cooling passage 55 having a complex shape as shown in Fig. 4 inside the float core 51, for example, a manufacturing technique using a 3D printer may be used.

[0034] 4, the float core 51 of this embodiment may be provided with a D-cut shape 56 at an upper position, which forms a horizontal plane in a cross-sectional view. Forming such a D-cut shape 56 can prevent the float core 51 from rotating within the cavity 43, so there is no circumferential misalignment between the lower tip of the pin member 46c and the recess 54. Therefore, forming the D-cut shape 56 allows the positioning mechanism 45 to stably position, fix, and release the float core 51.

[0035] Furthermore, the float core 51 according to this embodiment can be further improved as shown in Figures 5 and 6. That is, as shown in Figure 5, the float core 51 according to this embodiment has the die-cast product (cavity 61) that serves as a high-temperature heat source located on the fixed mold 21 side and below, whether during casting as shown in Figure 5(a) or in the state after casting as shown in Figure 5(b), and the die-cast product (cavity 61) is not located on the movable mold 31 side or above, so the heat is received unevenly (see Figure 6(a)), which in turn causes the thermal deformation (thermal expansion) of the float core 51 to also be uneven (the thermally expanded state is shown in Figure 6(b)).

[0036] Here, maintaining a constant clearance between the slide core 41 and the float core 51 leads to stable operation of the float core 51 and prevents unintended movement, but if uneven thermal expansion occurs in the float core 51, the clearance around the periphery of the float core 51 cannot be maintained constant, making it more susceptible to malfunction. Therefore, in the float core 51 of this embodiment, the cooling passage 55 is formed at an eccentric position offset from the center of the cross section when viewed in a cross section perpendicular to the direction of movement within the cavity 43. In other words, as shown in Figure 6(c), by forming the cooling passage 55 eccentrically on the side of the die-cast product (cavity 61), which is a high-temperature heat source, it is possible to suppress uneven thermal expansion that occurs in the float core 51, thereby stabilizing the clearance and stabilizing the operation of the float core 51.

[0037] The configuration of the die-casting die 10 according to this embodiment has been described above using Figures 1 to 6. Next, the operation of the die-casting die 10 according to this embodiment will be described using Figures 7 to 21. Here, Figures 7 to 21 are diagrams for explaining the steps of the die-casting method carried out using the die-casting die according to this embodiment.

[0038] FIG. 7 shows the state in which the die-casting mold 10 according to this embodiment is in a clamped state, and die-casting is completed, with molten metal such as aluminum being filled into the cavity 61 to cast a die-cast product.

[0039] As shown in Fig. 7, once the casting of the die-cast product is completed, the mold opening operation begins. That is, as shown in Figs. 8 to 15, the piston 35 of the hydraulic cylinder 34 operates, causing the hold-down member stopper 36 and the back-off stopper 37 to retract, and the slide core 41 and the hold-down member 33 are released from their positions (Fig. 8). Then, the hold-down member 33 that had been holding down the float core 51 retracts (Fig. 9), and the piston 25 of the hydraulic cylinder 24 installed in the fixed mold 21 pushes out the push-out rod 23, moving the float core 51 within the cavity 43 toward the movable mold 31 (Fig. 10). At this time, the tip of the pin member 46c of the pin mechanism 46 fits into the recess 54 of the float core 51, so that the float core 51 is positioned and fixed within the cavity 43.

[0040] Next, the push rod 23 retracts toward the fixed mold 21 (FIG. 11), and the movable mold 31 and sliding core 41 move in the mold opening direction (FIG. 12). In the state shown in FIG. 12, the die-cast product moves in the mold opening direction together with the movable mold 31 and sliding core 41. Thereafter, the sliding core 41 moves upward (FIG. 13). Also, in the state shown in FIG. 13, the push pin 38 installed in the movable mold 31 moves toward the fixed mold 21 to a position where it can push the die-cast product toward the fixed mold 21.

[0041] Then, as the ejector pin 38 moves further toward the fixed mold 21, the die-cast product is pushed toward the fixed mold 21, and the die-cast product is removed from the movable mold 31 and made ready to be removed from the die-casting mold 10 (FIG. 14). From the state shown in FIG. 14, the die-cast product is removed by operating a robot hand (not shown) or the like (FIG. 15). In this way, the mold opening operation of the die-casting mold 10 according to this embodiment is completed by the series of operational steps shown in FIGS. 8 to 15.

[0042] After the mold opening operation shown in FIG. 15 is completed, a mold release agent or the like is sprayed onto the cavity forming surfaces 22, 32, 42, 52, etc., and then the mold closing operation shown in FIGS. 16 to 20 begins.

[0043] That is, the slide core 41 moves downward (Fig. 16), and the movable mold 31 and slide core 41 move toward the fixed mold 21 (Fig. 17). From the state shown in Fig. 17, the presser member 33 moves toward the fixed mold 21 and comes into contact with the float core 51 (Fig. 18), and then the presser member 33 pushes out the float core 51, creating a state in which a cavity 61 is formed (Fig. 19). When transitioning from the state of Fig. 18 to the state of Fig. 19, the float core 51, which had been positioned and fixed within the cavity 43, is released from the fitted state between the recess 54 of the float core 51 and the tip of the pin member 46c of the pin mechanism part 46 due to the push-out of the presser member 33. Furthermore, the push rod 23 installed on the fixed mold 21 side is pushed out toward the movable mold 31 side and comes into contact with the end face of the float core 51 on the fixed mold 21 side, and the push rod 23 and the holding member 33 work together to clamp the float core 51, thereby fixing the float core 51 (Figure 19).

[0044] Thereafter, the piston 35 provided in the hydraulic cylinder 34 operates, causing the holding member stopper 36 and the retraction prevention stopper 37 to perform a restraining operation, thereby fixing the slide core 41 and the holding member 33 (FIG. 20). The mold clamping operation is completed by a series of operations shown in FIGS. 16 to 20.

[0045] Molten metal such as aluminum is introduced into cavity 61 from the state shown in Fig. 20, and a die-cast product is cast (Fig. 21). Thereafter, by repeatedly executing the series of operational steps shown in Figs. 8 to 21, mass production of die-cast products becomes possible.

[0046] While 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.

[0047] For example, in the above-described embodiment, the positioning mechanism according to the present invention has been described as a positioning mechanism 45 configured with a pin mechanism 46 installed in the slide core 41 and a groove-like recess 54 formed in the float core 51. However, various modifications can be made to the positioning mechanism according to the present invention. For example, FIG. 22 shows another example of the positioning mechanism 45 provided in the die-casting mold 10 according to this embodiment. Part (a) of the figure shows the state during casting, and part (b) shows the state after casting. As shown in FIG. 22, an electromagnet 75 can be used as the positioning mechanism according to the present invention. That is, the electromagnet 75 is provided in the slide core 41, and the electromagnet 75 can turn on its magnetic force to fix and hold the float core 51, or turn off its magnetic force to release the hold, thereby positioning and releasing the float core 51 within the cavity 43. The example shown in FIG. 22 can also achieve the same effects as the above-described embodiment.

[0048] Also, for example, in the above-described embodiment, the slide core 41 is movable in a direction intersecting the advancing and retracting direction of the movable die 31, i.e., in the vertical direction, and the float core 51 is movable in a direction perpendicular to the vertical direction which is the moving direction of the slide core, i.e., in the horizontal direction. However, in the die-casting die of the present invention, the movable directions of the slide core and float core can be set to any angular direction.

[0049] It is clear from the claims that such modifications and improvements may also be included within the technical scope of the present invention. [Explanation of symbols]

[0050] 10 die-casting mold, 21 fixed mold, 22 cavity forming surface, 23 ejector rod, 24 hydraulic cylinder, 31 movable mold, 32 cavity forming surface, 33 holding member, 34 hydraulic cylinder, 35 piston, 36 holding member stopper, 37 backstop stopper, 38 ejector pin, 39 sensor, 41 slide core, 42 cavity forming surface, 43 cavity, 45 positioning mechanism, 46 pin mechanism part (positioning mechanism), 46a cylinder (positioning mechanism), 46b spring (positioning mechanism), 46c pin member (positioning mechanism), 51 float core, 52 cavity forming surface, 53 detection plate, 54 recess (positioning mechanism), 55 cooling passage, 55a linear cooling passage, 55b spiral cooling passage, 56 D-cut shape, 61 cavity, 75 Electromagnet (positioning mechanism).

Claims

1. Fixed type and a movable mold that can move forward and backward in a mold clamping / mold opening direction relative to the fixed mold; a slide core that is movable in a direction intersecting the advancing and retreating direction of the movable die; a float core provided in a cavity formed inside the slide core and movable in a direction having a predetermined angle with respect to the moving direction of the slide core; Equipped with A die-casting mold in which a cavity is defined by the fixed die, the movable die, the slide core, and the float core, a positioning mechanism capable of positioning the float core in the cavity formed inside the slide core, The positioning mechanism includes: a cylindrical body provided on the slide core; a pin member provided in the cylindrical body so as to be able to move back and forth within the cylindrical body while being biased by a spring; a recess provided in the float core; and the float core is movable within the cavity from the fixed mold side to the movable mold side by being pushed out by a push rod while the fixed mold and the movable mold are clamped together, A die-casting mold characterized in that the float core is positioned within the cavity by moving within the cavity toward the movable mold and the pin member fitting into the recess.

2. The die casting mold according to claim 1, the positioning mechanism is configured to include at least an electromagnet provided on the slide core, The electromagnet generates a magnetic force to fix and hold the float core, thereby positioning the float core within the cavity.

3. The die casting mold according to claim 1, A die-casting mold characterized in that the float core has a cooling passage formed at an eccentric position shifted from the center of the cross section when viewed in a cross section perpendicular to the direction of movement within the cavity.

4. A die casting method, comprising the step of performing die casting using the die casting mold according to any one of claims 1 to 3.

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