Die casting molds

Abstract

To provide a die-casting mold with a relatively simple structure and general-purpose applicability. [Solution] This die-casting mold 1 comprises a fixed mold 10 and a movable mold 20 positioned opposite the fixed mold 10 and capable of moving forward and backward relative to the fixed mold 10, with the fixed mold 10 and the movable mold 20 defining a cavity 1a. The movable mold 20 has one or more mounting parts 100 on which a core 50 that slides in a direction different from the direction of movement of the movable mold 20 can be installed, and a shut-off cover 110 is installed on the mounting part 100 to close the mounting part 100 when the core 50 is not used.

Description

Technical Field

[0001] The present disclosure relates to a die-casting mold.

Background Art

[0002] A die-casting mold including a fixed mold and a movable mold, with a core provided in the movable mold, is known. The die-casting mold changes the shape of the fixed mold, the movable mold, or the core according to the shape of the die-cast product to be manufactured, and defines a desired cavity shape. In recent years, with the increasing needs for multi-variety and small-batch production, the operation of changing the shape of the fixed mold, the movable mold, or the core for each die-cast product requires a great deal of cost. Therefore, efforts have been made to generalize a part of the fixed mold, the movable mold, or the core.

[0003] For example, Patent Document 1 below discloses a technique of dividing a mold including a core into a general-purpose part and a dedicated part, leaving the common general-purpose part in the molding machine, and only replacing the components of the dedicated part.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, in the mold according to Patent Document 1 described above, the configuration of the dedicated part was relatively complicated. In addition, depending on the shape of the die-cast product, it was necessary to provide holes for inserting extrusion pins used when taking out the die-cast product from the die-casting mold after casting on the general-purpose part side, and there was room for further improvement towards generalization.

[0006] This disclosure has been made in view of the problems present in the prior art described above, and its purpose is to provide a die-casting mold that has a relatively simple structure and is general-purpose. [Means for solving the problem]

[0007] The following describes this disclosure. Reference numbers to the attached drawings are indicated in parentheses to facilitate understanding of this disclosure, but this does not mean that this disclosure is limited to the illustrated form.

[0008] The die-casting mold (1) according to this disclosure comprises a fixed mold (10) and a movable mold (20) positioned opposite the fixed mold (10) and capable of moving forward and backward relative to the fixed mold (10), wherein the fixed mold (10) and the movable mold (20) define a cavity (1a), and the movable mold (20) has one or more mounting parts (100) on which a core (50) that slides in a direction different from the direction of movement of the movable mold (20) can be installed, and the mounting parts (100) are characterized in that a shut-off cover (110) is installed on the mounting parts (100) to close the mounting parts (100) when the core (50) is not used.

[0009] Furthermore, in the die-casting mold (1) according to this disclosure, the movable mold (20) may have the mounting portions (100) in the upward, downward, rightward, and leftward directions when viewed from the front, which is the surface facing the fixed mold (10).

[0010] Furthermore, in the die-casting mold (1) according to this disclosure, the fixed mold (10) has a fixed die (12) that defines the cavity (1a) and a fixed holder (11) that houses and fixes the fixed die (12), and the movable mold (20) has a movable die (22) that defines the cavity (1a) and a movable holder (21) that houses and fixes the movable die (22), and the fixed holder (11) or the movable holder (21) is the movable mold (20) has an opening (11a) that penetrates in the thickness direction which is the direction of movement of (20), and a reinforcing member (70) can be accommodated in the opening (11a), and the reinforcing member (70) can support the fixed die (12) housed and fixed in the fixed holder (11) or the movable die (22) housed and fixed in the movable holder (21) by having one end of the reinforcing member (70) in the thickness direction abut against the fixed die (12) or the movable die (22).

[0011] Furthermore, in the die-casting mold (1) according to the present disclosure, the core (50) comprises a core die (52) and a core holder (51) for housing and fixing the core die (52), the core die (52) is provided with a cooling circuit for guiding cooling water to cool the core die (52), and the core holder (51) may be provided with a guide groove (81) which is a groove capable of housing a portion of a cooling hose (80) connected to the cooling circuit. [Effects of the Invention]

[0012] According to this disclosure, it is possible to provide a die-casting mold that has a relatively simple configuration and is general-purpose. [Brief explanation of the drawing]

[0013] [Figure 1] This 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 this embodiment, and in particular, it shows the state before molten metal is filled in. [Figure 2] This 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 this embodiment, and in particular, it shows the state after molten metal has been filled. [Figure 3]This is a front view of the fixed mold that constitutes the die-casting mold according to this embodiment. [Figure 4] This is a front view of the movable mold that constitutes the die-casting mold according to this embodiment. [Figure 5] This is a front view showing an example of the overall configuration of the movable mold side in the die-casting mold according to this embodiment. [Figure 6] This figure shows various configuration examples of the movable mold that constitutes the die-casting mold according to this embodiment. Diagram (a) in the figure shows a state in which cores are installed in all of the installation parts, and Diagram (b) in the figure shows a state in which shut-off covers are installed in all of the installation parts. [Figure 7] This is a perspective view of the fixed holder constituting the die-casting mold according to this embodiment, as seen from the rear side. [Figure 8] This is a right side view of a core that can be installed in a die-casting mold according to this embodiment. [Modes for carrying out the invention]

[0014] Hereinafter, preferred embodiments for implementing this disclosure will be described with reference to the drawings. Note that the following embodiments are not intended to limit the inventions described in each claim, and not all combinations of features described in the embodiments are necessarily essential to the solution of the invention.

[0015] Before describing the die-casting mold 1 according to this embodiment, we will first explain the general configuration of a typical die-casting apparatus in which the die-casting mold 1 according to this embodiment is used, based on Figures 1 and 2. Here, Figures 1 and 2 are cross-sectional views showing an example of the overall configuration of a die-casting apparatus equipped with the die-casting mold according to this embodiment. In particular, Figure 1 shows the state before molten metal filling, and Figure 2 shows the state after molten metal filling.

[0016] As shown in FIGS. 1 and 2, the die-casting mold 1 according to the present embodiment is provided as a main component of a die-casting apparatus, and includes a fixed mold 10 and a movable mold 20 that is disposed opposite to the fixed mold 10 and is movable forward and backward with respect to the fixed mold 10. The fixed mold 10 includes a fixed die 12 and a fixed holder 11 that houses and fixes the fixed die 12. The movable mold 20 includes a movable die 22 and a movable holder 21 that houses and fixes the movable die 22. A cavity 1a is defined by the fixed die 12 and the movable die 22. Further, a sleeve 30 is provided in the die-casting mold 1. The sleeve 30 communicates with the cavity 1a via a biscuit forming portion 1b, a runner forming portion 1c, and a gate forming portion 1d. A plunger tip 31 is provided in the sleeve 30. A diverter 40 is provided at the position of the biscuit forming portion 1b, which is the position facing the forward direction of the plunger tip 31.

[0017] When the plunger tip 31 advances in the sleeve 30 and presses the molten metal 2, the molten metal 2 is filled into the cavity 1a through the biscuit forming portion 1b, which is the injection port, the runner forming portion 1c, and the gate forming portion 1d. From the state shown in FIG. 1, when the plunger tip 31 is advanced to the state shown in FIG. 2, the molten metal 2 that has been pressed by the plunger tip 31 and sent into the sleeve 30 collides with the diverter 40. The molten metal 2 that has collided with the diverter 40 is configured to be guided to the runner forming portion 1c and the gate forming portion 1d by the diverter 40.

[0018] <G Next, the specific configuration of the die-casting mold 1 according to the present embodiment will be described with reference to FIGS. 3 to 8. Here, FIG. 3 is a front view of the fixed mold constituting the die-casting mold according to the present embodiment. Further, FIG. 4 is a front view of the movable mold constituting the die-casting mold according to the present embodiment. Further, FIG. 5 is a front view showing an overall configuration example on the movable mold side in the die-casting mold according to the present embodiment. Further, FIG. 6 is a diagram showing various configuration examples of the movable mold constituting the die-casting mold according to the present embodiment. Sub-diagram (a) in the figure shows a state in which inserts are installed in all the installation parts, and sub-diagram (b) in the figure shows a state in which blocking lids are installed in all the installation parts. Further, FIG. 7 is a perspective view of the fixed holder constituting the die-casting mold according to the present embodiment as viewed from the back side. Furthermore, FIG. 8 is a right side view of the insert that can be installed in the die-casting mold according to the present embodiment.

[0019] As shown in FIG. 3, the fixed mold 10 constituting the die-casting mold 1 according to the present embodiment includes a fixed die 12 that defines the cavity 1a and a fixed holder 11 that houses and fixes the fixed die 12.

[0020] As shown in FIGS. 4 and 5, the movable mold 20 constituting the die-casting mold 1 according to the present embodiment is disposed opposite to the fixed mold 10 and is installed so as to be able to advance and retreat with respect to the fixed mold 10. The movable mold 20 includes a movable die 22 that defines the cavity 1a, a movable holder 21 that houses and fixes the movable die 22, and an installation part 100 where an insert 50 that slides in a direction different from the advancing and retreating direction of the movable mold 20 can be installed.

[0021] Four installation parts 100 are provided in the movable holder 21. That is, when looking at the front surface, which is the surface of the movable mold 20 facing the fixed mold 10, an upper installation part 100a, a right installation part 100b, a lower installation part 100c, and a left installation part 100d are provided in the upper, lower, right, and left directions, respectively.

[0022] Right-facing mounting section 100b, downward-facing mounting section 100c, and left-facing mounting section 100d are equipped with right-facing cores 50b, downward-facing cores 50c, and left-facing cores 50d, respectively. Each core 50 has a core die 52 and a core holder 51 that houses and fixes the core die 52. By driving the drive mechanism 60 connected to each mounting section 100, a part of the core die 52 can be slid into the cavity 1a, thereby defining the cavity 1a. On the other hand, the upward-facing mounting section 100a is equipped with an upward-facing shut-off cover 110a, which is a shut-off cover 110 that closes the mounting section 100, instead of being equipped with cores 50.

[0023] In other words, by sliding the core die 52 of each core 50 installed in each installation section 100 toward the side that enters the cavity 1a, and bringing the fixed die 12 and the movable die 22 into contact, the desired shape of the cavity 1a can be obtained. On the other hand, in installation sections 100 where no core 50 is installed, the blocking cover 110 can be installed to prevent the core 50 from entering the cavity 1a.

[0024] In this embodiment, the shapes of the fixed die 12, movable die 22, and core die 52 are custom-made to match the shape of the cavity 1a. On the other hand, the shapes of the fixed holder 11, movable holder 21, and core holder 51 do not need to be changed to match the shape of the cavity 1a and can be general-purpose.

[0025] Furthermore, in this embodiment, a barrier cover 110a is installed on the upper installation section 100a, and a right-direction core 50b, a lower-direction core 50c, and a left-direction core 50d are installed on the right-direction installation section 100b, the lower-direction installation section 100c, and the left-direction installation section 100d, respectively. However, each installation section 100 can be used to install either a core 50 or a barrier cover 110.

[0026] For example, as shown in subdivision (a) of Figure 6, the core 50, consisting of the upper core 50a, right core 50b, lower core 50c, and left core 50d, can be installed in any of the upper mounting section 100a, right mounting section 100b, lower mounting section 100c, and left mounting section 100d. Also, as shown in subdivision (b) of Figure 6, the shut-off cover 110, consisting of the upper shut-off cover 110a, right shut-off cover 110b, lower shut-off cover 110c, and left shut-off cover 110d, can be installed in any of the upper mounting section 100a, right mounting section 100b, lower mounting section 100c, and left mounting section 100d. This allows for the arbitrary setting of the installation locations for the fixed die 12, movable die 22, or core die 52, and by installing the shielding cover 110 in the installation section 100 where the core die 52 is not used, a versatile die-casting mold 1 that can accommodate any cavity 1a shape can be constructed.

[0027] Furthermore, as shown in Figure 5, in this embodiment, the drive mechanism 60 for sliding the core 50 was removed from the movable holder 21 because the barrier cover 110a was installed in place of the core 50 in the upward mounting section 100a. However, the barrier cover 110 may be installed in the mounting section 100 without removing the drive mechanism 60 from the movable holder 21. Alternatively, the core 50 may be installed outside the mounting section 100, and the barrier cover 110 may be installed inside the core 50 to prevent the core from entering the cavity 1a.

[0028] Furthermore, as shown in Figure 7, the fixed holder 11 according to this embodiment has an opening 11a located at the center of the back surface, which penetrates in the thickness direction, which is the direction in which the movable type 20 moves forward and backward. The opening 11a can accommodate the reinforcing member 70.

[0029] The reinforcing member 70 is cylindrical in shape, extending in the thickness direction which is the direction of movement of the movable mold 20. One end in the thickness direction abuts against the fixed die 12, and the other end is connected to a platen of a casting machine (not shown) installed on the rear side of the fixed holder 11. By configuring the reinforcing member 70 so that one end abuts against the fixed die 12, the reinforcing member 70 can support the fixed die 12 housed and fixed on the front side of the fixed holder 11.

[0030] In this embodiment, the movable holder 21 has the same configuration as the fixed holder 11. Therefore, a detailed explanation of the configuration of the movable holder 21 will be omitted.

[0031] In general, to remove a die-cast product obtained by cooling and solidifying molten metal 2 filled in the cavity 1a from the die-casting mold 1, the fixed mold 10 and the movable mold 20 are opened, and then an ejection pin inserted through a pin-through hole formed through the movable holder 21 and the movable die 22 pushes out the die-cast product, thereby separating it from the cavity 1a. In other words, in conventional die-casting molds, it is necessary to form a pin-through hole for inserting the ejection pin in the movable holder 21 and the movable die 22 according to the shape of the cavity 1a, making it difficult to generalize the movable holder 21. On the other hand, in the die-casting mold 1 according to this embodiment, the movable holder 21 has an opening in the center of its back surface, similar to the opening 11a of the fixed holder 11, and is configured to house a reinforcing member 70 in this opening. Therefore, in the die-casting mold 1 according to this embodiment, an ejection pin or the like can be freely placed at any location where an opening is formed in the movable holder 21. In other words, instead of forming pin holes or the like in the movable holder 21, by using a configuration where an ejection pin or the like is passed through the opening, it becomes unnecessary to form pin holes or the like in the movable holder 21 according to the shape of the cavity 1a, and the movable holder 21 can be made more versatile. The fixed holder 11 can also be made more versatile in the same way.

[0032] Furthermore, in this embodiment, both the fixed holder 11 and the movable holder 21 have an opening 11a in the center of their back surface, and the reinforcing member 70 is housed in the opening 11a. However, depending on the position of the pin-through hole for inserting the ejection pin, the opening 11a may be provided in only one of the fixed holder 11 or the movable holder 21. Alternatively, neither the fixed holder 11 nor the movable holder 21 may have an opening 11a.

[0033] Furthermore, in this embodiment, providing an opening 11a in the center of the back of the fixing holder 11 may reduce the strength for supporting the fixing die 12. However, by housing a reinforcing member 70 in the opening 11a and having the reinforcing member 70 support the fixing die 12 from the back side, the reduction in strength for supporting the fixing die 12 due to the provision of the opening 11a can be suppressed.

[0034] Furthermore, as shown in Figure 8, the core die 52 in the core 50 of the die-casting mold 1 according to this embodiment is equipped with a cooling circuit for guiding cooling water to cool the core die 52. The cooling circuit of the core die 52 can be composed of, for example, a cooling water passage (not shown) formed inside the core die 52 and a cooling pipe 53 connected to the cooling water passage and protruding toward the core holder 51 installation side. Furthermore, the core holder 51 is equipped with a guide groove 81, which is a groove capable of accommodating a portion of a pair of cooling hoses 80, 80 that are connected to the cooling pipes 53 that constitute part of the cooling circuit. The guide groove 81 is provided extending from the vicinity of the connection side with the core die 52 to the other end of the core holder 51. In addition, the ends of the pair of cooling hoses 80, 80 opposite to the connection side with the cooling pipes 53 that constitute part of the cooling circuit installed on the core die 52 are connected to a cooling water supply device (not shown), allowing cooling water to flow into the cooling circuit for cooling the core die 52. In this embodiment, a cooling pipe 53, which is the connection point to the cooling hose 80, is installed on the right side of the core die 52, and a guide groove 81 is installed on the lower right side of the core holder 51. However, the connection position and structure between the cooling hose 80 and the cooling circuit connection point, as well as the formation position of the guide groove 81, can be arbitrarily set.

[0035] While preferred embodiments of this disclosure have been described above, the technical scope of this disclosure is not limited to the embodiments described above. Various modifications or improvements can be made to the above embodiments.

[0036] For example, in this embodiment, the movable type 20 had mounting parts 100 in the upward, downward, rightward, and leftward directions when viewed from the front. However, the number of mounting parts 100 is not limited to four; one or more are sufficient. Furthermore, the mounting direction of the mounting parts 100 and their relative positions are not limited to the above configuration. For example, the number of mounting parts 100 could be three, and the mounting parts 100 could be arranged such that the lines connecting each mounting part 100 form an approximately equilateral triangle when viewed from the front of the movable type 20.

[0037] For example, in this embodiment, the reinforcing member 70 was cylindrical in shape and extended in the thickness direction, which is the direction in which the movable mold 20 moves back and forth. However, the shape of the reinforcing member 70 is not limited to cylindrical. Furthermore, by making the reinforcing member 70 a shape that increases the area of ​​the contact surface with the fixed die 12 or the movable die 22, or by using multiple reinforcing members 70, the reduction in strength caused by providing an opening 11a in the fixed holder 11 or the movable holder 21 can be further suppressed.

[0038] It is clear from the claims that such modified or improved forms may also fall within the technical scope of the present invention. [Explanation of symbols]

[0039] 1 die-casting mold, 1a cavity, 1b biscuit forming section, 1c runner forming section, 1d gate forming section, 2 molten metal, 10 fixed mold, 11 fixed holder, 11a opening, 12 fixed die, 20 movable mold, 21 movable holder, 22 movable die, 30 sleeve, 31 plunger tip, 40 flow divider, 50 core, 50a upward core, 50b rightward core, 50c downward core, 50d leftward core, 51 core holder, 52 core die, 53 cooling pipe, 60 drive mechanism, 70 reinforcing member, 80 cooling hose, 81 guide groove, 100 mounting section, 100a upward mounting section, 100b rightward mounting section, 100c downward mounting section, 100d leftward mounting section, 110 Shut-off cover, 110a Upward shut-off cover, 110b Rightward shut-off cover, 110c Downward shut-off cover, 110d Leftward shut-off cover.

Claims

1. Fixed type, A movable type is positioned opposite the fixed type and is capable of moving forward and backward relative to the fixed type, A die-casting mold comprising the fixed mold and the movable mold defining a cavity, The movable type has one or more mounting parts on which a core that slides in a direction different from the direction of advancement and retraction of the movable type can be installed. The die-casting mold is characterized in that, when the core is not used, a shut-off cover is installed in the installation section to close the installation section.

2. A die-casting mold according to claim 1, The die-casting mold is characterized in that the movable mold has the mounting portions in the upward, downward, rightward, and leftward directions when viewed from the front, which is the surface facing the fixed mold.

3. A die-casting mold according to claim 1 or 2, The fixed mold comprises a fixed die that defines the cavity and a fixed holder that houses and fixes the fixed die. The movable mold comprises a movable die that defines the cavity and a movable holder that houses and fixes the movable die. The fixed holder or the movable holder has an opening that penetrates in the thickness direction, which is the direction of advancement and retraction of the movable type, and the opening is capable of accommodating a reinforcing member. The die-casting mold is characterized in that the reinforcing member supports the fixed die housed in the fixed holder or the movable die housed in the movable holder by having one end in the thickness direction abut against the fixed die or the movable die.

4. A die-casting mold according to claim 1 or 2, The core comprises a core die and a core holder for housing and fixing the core die. The core die is equipped with a cooling circuit that guides cooling water to cool the core die. The die-casting mold is characterized in that the core holder is provided with a guide groove, which is a groove capable of accommodating a portion of a cooling hose connected to the cooling circuit.

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