Die-casting die and die-casting system

Abstract

The utility model relates to a die-casting die and a die-casting system.The die-casting die comprises a first die layer, a second die layer and a third die layer which are sequentially arranged in a stacked mode; a transverse runner is defined between the first mold layer and the second mold layer, and the first mold layer is further provided with a sprue bush communicated with the transverse runner; a cavity is defined between the second mold layer and the third mold layer; and a vertical runner is also communicated between the transverse runner and the cavity, and penetrates through the second mold layer in the thickness direction. The size stability of a structural part formed through the die-casting die in a die-casting mode is guaranteed, the product quality is guaranteed, and meanwhile the process difficulty can be lowered.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of die casting equipment, in particular to a die casting die and a die casting system. BACKGROUND

[0002] Die casting is a rapid prototyping forming method for complex structures. In the prior art, the runner of the die casting die is designed on the main parting surface for casting large structural parts.

[0003] In the prior art, due to process requirements, the runner of the die casting die is relatively thick, and after the mold is opened, the formed part in the runner will shrink and drive the structural part to produce a large deformation, which is difficult to control, thereby affecting the product quality. Even after mass production, the change in mold temperature will affect the deformation of the runner and the product, resulting in poor dimensional stability of the product. Moreover, the setting of the runner on the main parting surface also leads to a large tonnage required in the die casting process and a large die casting process difficulty.

[0004] Therefore, how to ensure the dimensional stability of the structural part formed by the die casting die, ensure the product quality, and at the same time reduce the process difficulty is a technical problem that needs to be solved by those skilled in the art. Content of the utility model

[0005] The purpose of the application is to provide a die casting die and a die casting system, which can ensure the dimensional stability of the structural part formed by the die casting die, ensure the product quality, and at the same time reduce the process difficulty.

[0006] To solve the above technical problems, the application provides a die casting die, which comprises first, second and third die layers arranged in sequence; a horizontal runner is formed between the first and second die layers, and the first die layer is further provided with a sprue bush communicating with the horizontal runner; a cavity is formed between the second and third die layers; a vertical runner is further communicated between the horizontal runner and the cavity, and the vertical runner penetrates the second die layer in the thickness direction.

[0007] Optionally, the number of the vertical runners is multiple, each of the vertical runners is communicated with the horizontal runner, and the cavity is provided with multiple inner gates, the number of the inner gates is the same as that of the vertical runners and the inner gates are communicated one by one.

[0008] Optionally, the horizontal runner comprises a main runner and a branch runner, the main runner is communicated with the sprue bush, the branch runner is communicated with the vertical runner, and the main runner is communicated with at least two branch runners.

[0009] Optionally, the number of the main runners is at least two, and one end of each of the main runners is communicated with the sprue bush.

[0010] Optionally, at least part of the main runner comprises a first main runner and a second main runner, the first main runner is communicated with the sprue bush, and the second main runner is communicated with the runner.

[0011] Optionally, at least part of the second main runner and the runner further comprises a third main runner, the second main runner is communicated with at least two third main runners, and the third main runner is communicated with at least two runners.

[0012] Optionally, the first main runner is provided with a plurality of interfaces along the length direction, each interface is communicated with a corresponding second main runner, and the sprue bush and the adjacent interfaces and the adjacent interfaces form interval sections, respectively, the flow area of the interval section close to the sprue bush is greater than that of the interval section away from the sprue bush.

[0013] Optionally, the second mold layer is provided with a first vertical runner along the thickness direction, and the third mold layer is provided with a second vertical runner on the side facing the second mold layer, the second vertical runner is communicated with the inner gate, and the first vertical runner and the second vertical runner are communicated to form the vertical runner.

[0014] Optionally, the vertical runner and the inner gate of the cavity are communicated with a fan-shaped runner.

[0015] The application further provides a die casting system comprising a die casting device and the die casting mold.

[0016] Compared with the prior art, the die casting mold and the die casting system have the following technical effects:

[0017] Since the cavity is located between the second mold layer and the third mold layer, and the horizontal runner is formed between the first mold layer and the second mold layer, that is, the horizontal runner and the cavity are arranged in different layers, that is, the horizontal runner is not arranged on the parting surface, the locking force of the horizontal runner and the cake is transferred, compared with the prior art in which the horizontal runner is arranged on the parting surface, the locking force required when the die casting mold is used to produce the cast product can be reduced by 10%-20%, and the requirement of the die casting process on the die casting tonnage can be reduced.

[0018] When the product is demolded, the first mold layer is separated from the second mold layer, the material cake formed in the bushing sleeve is separated from the molded part in the horizontal runner, and then the second mold layer is separated from the third mold layer, only the molded part in the vertical runner is on the product, regardless of the structure and size of the bushing sleeve or the horizontal runner, the molded structure in the cavity will not be affected, only the vertical runner and the cavity are connected, the deformation of the product will be greatly reduced, thus the situation that the horizontal runner shrinkage affects the deformation of the product can be avoided, and the stability of the size of the cast product is ensured.

[0019] In addition, the die casting mold provided by the present application only has one bushing sleeve, compared with the structure having two bushing sleeves, the simultaneity of casting by multiple bushing sleeves and the simultaneity of die casting do not need to be considered, and the instability of the structural part at the metal liquid confluence does not need to be considered, so that the product quality of the structural part can be ensured. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a structural schematic view of a die casting mold provided by an embodiment of the present application;

[0021] Figure 2 is Figure 1 is a structural schematic view of the runner and cavity inside the die casting mold in

[0022] Figure 3 is Figure 1 is a structural schematic view of the runner and cavity inside the die casting mold in another view in

[0023] The accompanying Figures 1-3 In the accompanying drawings, the reference signs are explained as follows:

[0024] 1 first mold layer; 2 second mold layer; 3 third mold layer; 4 horizontal runner, 41 main runner, 411 first-level main runner, 412 second-level main runner, 42 branch runner, 43 interface; 5 bushing sleeve; 6 cavity; 7 vertical runner, 71 first-level vertical runner, 72 second-level vertical runner; 8 fan-shaped runner; 9 inner gate; 10 material cake. DETAILED DESCRIPTION

[0025] In order for those skilled in the art to better understand the technical solutions of the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] Die casting is a rapid prototyping of complex structure forming method, the existing die casting mold runner design in the main parting surface, for large structure of casting, due to process requirements, die casting mold flow channel design is relatively thick, after opening, the flow channel of the forming part will produce shrinkage, and drive the structure of the larger deformation, difficult to control, thus affecting the product quality. Even in mass production, due to the change of mold temperature, the deformation of the flow channel and the product will be affected, resulting in poor dimensional stability of the product. And, the flow channel is set on the main parting surface, which will lead to a larger tonnage required in the die casting process, and the die casting process is difficult.

[0027] To solve the above problems, the embodiment provides a die casting mold which can be applied to large size castings to ensure the stability and quality of the product.

[0028] Specifically, as shown in Figure 1 The die casting mold includes first mold layer 1, second mold layer 2 and third mold layer 3 which are stacked in sequence, wherein the first mold layer 1 and the second mold layer 2 can be enclosed to form a horizontal flow channel 4, and the second mold layer 2 and the third mold layer 3 can be enclosed to form a cavity 6, which is matched with the structure to be die cast, that is, the metal piece formed after the metal liquid in the cavity 6 cools and solidifies is the structure to be die cast.

[0029] The first mold layer 1 is provided with a sprue bushing 5 along the thickness direction, the sprue bushing 5 is communicated with the horizontal flow channel 4, and the horizontal flow channel 4 and the cavity 6 are communicated through a vertical flow channel 7, the vertical flow channel 7 penetrates the second mold layer 2 in the opposite direction along the thickness direction, and the molten metal liquid can be introduced into the horizontal flow channel 4 through the sprue bushing 5, then the metal liquid can enter the vertical flow channel 7 through the horizontal flow channel 4, and finally enter the cavity 6 through the inner gate 9, and the required structure is formed after the metal liquid cools and solidifies.

[0030] Since the cavity 6 is located between the second mold layer 2 and the third mold layer 3, that is, the parting surface is located between the second mold layer 2 and the third mold layer 3, and the horizontal flow channel 4 is formed between the first mold layer 1 and the second mold layer 2, that is, the horizontal flow channel 4 and the cavity 6 are arranged in different layers, that is, the horizontal flow channel 4 is not arranged on the parting surface, and the locking force of the horizontal flow channel 4 and the cake 10 is transferred, compared with the scheme of arranging the horizontal flow channel 4 on the parting surface in the prior art, the locking force required for producing the cast product by the die casting mold provided by the embodiment can be reduced by 10%-20%, that is, the die casting tonnage is reduced by 10%-20%, thereby reducing the die casting process requirement and reducing the cost.

[0031] When demolding, the first mold layer 1 is separated from the second mold layer 2 first, and then the material cake 10 formed in the gate bush 5 is separated from the formed part in the horizontal runner 4, and then the second mold layer 2 is separated from the third mold layer 3, and only the formed part in the vertical runner 7 is on the product, regardless of the structure and size of the gate bush 5 or the horizontal runner 4, which will not affect the formed structure in the cavity 6, only the vertical runner 7 and the cavity 6 are connected, and the deformation of the product is greatly reduced, which can avoid the shrinkage of the horizontal runner 4 affecting the deformation of the product, and ensure the stability of the size of the cast product.

[0032] Furthermore, the die casting mold provided by the embodiment only needs to be provided with one gate bush 5, compared with the structure provided with two gate bushes 5, there is no need to consider the simultaneity of casting and die casting of multiple gate bushes 5, and there is no need to consider the instability of the structure at the metal liquid confluence, which can ensure the product quality of the structure.

[0033] The first mold layer 1 and the second mold layer 2 can be respectively provided with mutually matched positioning structures, and the second mold layer 2 and the third mold layer 3 can be respectively provided with mutually matched positioning structures, and the positioning structures are matched and positioned to ensure that the horizontal runner 4, the vertical runner 7 and the inner gate 9 can be sequentially and correspondingly connected in the installed state of the mold layers, and the assembly operation can be simplified, the adjustment frequency can be reduced, and the assembly efficiency can be improved.

[0034] Furthermore, in the embodiment, the fixing mode between the mold layers is not limited, for example, fasteners can be used for fixing, and clamping members can also be used for clamping and fixing. Furthermore, the first mold layer 1, the second mold layer 2 and the third mold layer 3 can be fixed integrally, or the first mold layer 1 and the second mold layer 2 can be separately fixed, and the second mold layer 2 and the third mold layer 3 can be separately fixed, and the fixing modes can be the same or different, which is not limited here.

[0035] As shown in Figures 1-3 The vertical runner 7 is provided with a plurality of vertical runners 7, each vertical runner 7 is connected with the horizontal runner 4, the cavity 6 is provided with a plurality of inner gates 9, the number of the vertical runner 7 is the same as that of the inner gate 9, and each vertical runner 7 is connected with each inner gate 9 one by one. The plurality of vertical runners 7 can increase the number of the inner gates 9, and for the product with large size, the number of the inner gates 9 can be increased to realize multiple point feeding, so that the metal liquid can quickly reach each position of the cavity 6, and the situation that the metal liquid flow path is too long to reduce the flowability and even cannot be fused to produce cold material is avoided, thereby ensuring the product quality of the structure.

[0036] As shown in Figure 2 and Figure 3As shown, the transverse flow channel 4 includes main flow channels 41 and branch flow channels 42, wherein the main flow channels 41 are in communication with the sprue bush 5, the branch flow channels 42 are in communication with the vertical flow channels 7, and each main flow channel 41 is in communication with at least two branch flow channels 42, that is, the molten metal cast by the sprue bush 5 is distributed to a larger number of branch flow channels 42 after entering the main flow channel 41, and then reaches the cavity 6 through the vertical flow channel 7. Since the number of branch flow channels 42 is large, the molten metal entering the transverse flow channel 4 can be quickly distributed to each vertical flow channel 7, and then distributed to each position of the cavity 6, so that the flow path of the molten metal reaching the cavity 6 in the cavity 6 is short, avoiding the situation that the flowability of the molten metal is reduced or even cannot be fused due to the long flow path, thereby ensuring the product quality of the structural part.

[0037] Specifically, the number of branch flow channels 42 connected by each main flow channel 41 is not limited, and the number of branch flow channels 42 connected by each main flow channel 41 can be the same or different, which is not limited here.

[0038] As shown in the figure, Figure 2 The number of main flow channels 41 is two, and each end of each main flow channel 41 is in communication with the sprue bush 5. In this way, after the molten metal enters the main flow channel 41, it will be distributed through at least two main flow channels 41, which can further shorten the flow path of the molten metal and avoid the situation that the flowability of the molten metal is reduced or even cannot be fused due to the long flow path, thereby ensuring the product quality of the casting.

[0039] As shown in the figure, Figure 2 The number of main flow channels 41 is two, and of course, the number of main flow channels 41 can also be set to three, four or more, which can be set according to the specific structure and arrangement of the cavity 6.

[0040] As shown in the figure, Figure 2 At least part of the main flow channels 41 includes a first-level main flow channel 411 and a second-level main flow channel 412, wherein the first-level main flow channel 411 is in communication with the sprue bush 5, the second-level main flow channel 412 is in communication with the branch flow channel 42, and the first-level main flow channel 411 is in communication with at least two second-level main flow channels 412, and the second-level main flow channel 412 is in communication with at least two branch flow channels 42.

[0041] The number of branch flow channels 42, vertical flow channels 7 and ingates 9 is the same and one-to-one correspondence. When at least part of the main flow channels 41 is set to include a first-level main flow channel 411 and a second-level main flow channel 412, more ingates 9 can be set while ensuring that there is only one sprue bush 5. It is suitable for products with large volume. By setting more pouring points, the flow path of the molten metal can be shortened during casting, the speed of filling the cavity 6 with molten metal can be accelerated, and the product quality and stability of the structural part can be ensured.

[0042] Specifically, in the embodiment, all the main flow channels 41 can respectively include a first main flow channel 411 and a second main flow channel 412, or part of the main flow channels 41 can be provided with the first main flow channel 411 and the second main flow channel 412, and part of the main flow channels 41 can directly communicate with the branch flow channels 42. Moreover, the number of the second main flow channels 412 communicating with the same first main flow channel 411 is not limited, and the number of the second main flow channels 412 communicating with each first main flow channel 411 can be the same or different.

[0043] Further, at least part of the second main flow channels 412 and the branch flow channels 42 further communicate with third main flow channels (not shown in the figure), and the number of the third main flow channels communicating with the same second main flow channel 412 is not less than two, and each third main flow channel respectively communicates with at least two branch flow channels 42, that is, the metal liquid of the first main flow channel 411 is distributed through at least two second main flow channels 412 and then distributed to the branch flow channels 42 through more third main flow channels. In this way, for positions with more material or relatively complex local structure, the metal liquid can be more quickly filled into each position of the cavity 6, the flow path of the metal liquid is shortened, and the quality of the cast product is ensured.

[0044] Specifically, all the second main flow channels 412 can communicate with the branch flow channels 42 through the third main flow channels, or part of the second main flow channels 412 can communicate with the third main flow channels, and part of the second main flow channels 412 can directly communicate with the branch flow channels 42. Moreover, the number of the third main flow channels communicating with the same second main flow channel 412 is not limited, and the number of the third main flow channels communicating with each second main flow channel 412 can be the same or different.

[0045] As shown in Figure 2 The first main flow channel 411 is provided with a plurality of interfaces 43 along the length direction thereof, each interface 43 respectively communicates with a corresponding second main flow channel 412 or branch flow channel 42, and a spacing section is respectively formed between the sprue bush 5 and the adjacent interface 43 and between two adjacent interfaces 43. The flow area of the spacing section close to the sprue bush 5 is greater than that of the spacing section away from the sprue bush 5, that is, when the metal liquid entering the main flow channel 41 from the sprue bush 5 flows along the length direction of the main flow channel 41, part of the metal liquid will enter the corresponding second main flow channel 412 or branch flow channel 42 through each interface 43, so that the metal liquid in the first main flow channel 411 is reduced. Therefore, the cross-sectional area of the spacing section on the downstream side of the interface 43 is correspondingly reduced, so as to ensure that each position in the first main flow channel 411 is filled with metal liquid, avoid the existence of gas and the like, and ensure the product quality of the castings.

[0046] As shown in Figure 2 and Figure 3As shown, the fan-shaped flow channel 8 is in communication between the vertical flow channel 7 and the inner gate 9, and the flow channel of the fan-shaped flow channel 8 is substantially in a fan-shaped structure. For large, thin-walled or complex-shaped structural parts, such as the cavity 6 with corner structure, the fan-shaped flow channel 8 can be in communication with both sides of the corner structure at the same time to ensure the uniformity of the filling at the corner structure. Of course, in the embodiment, the communication mode between the vertical flow channel 7 and the inner gate 9 is not limited, such as directly into the cavity 6 through a point gate. For the cavity 6 with large volume and corner structure, the metal liquid is uniformly filled into the cavity 6 through the fan-shaped flow channel 8, which can ensure the uniformity of the metal liquid filling and further ensure the quality of the casting product.

[0047] As shown in the drawings, Figure 1 As shown, the second mold layer 2 is provided with a first vertical flow channel 71 penetrating in the thickness direction, and the third mold layer 3 is provided with a second vertical flow channel 72 on the side facing the second mold layer 2. The second vertical flow channel 72 does not penetrate the third mold layer 3. After the second mold layer 2 and the third mold layer 3 are fixed, the first vertical flow channel 71 and the second vertical flow channel 72 are in communication and form the above-mentioned vertical flow channel 7. The first vertical flow channel 71 is in communication with the horizontal flow channel 4, and the second vertical flow channel 72 is in communication with the inner gate 9 through the fan-shaped flow channel 8. That is, the vertical flow channel 7 not only includes the first vertical flow channel 71 penetrating the second mold layer 2, but also includes the second vertical flow channel 72 provided on the third mold layer 3. In this way, the position of the fan-shaped flow channel 8 can be set according to the structure of the cavity 6, which is good in flexibility and can ensure the quality of the casting product.

[0048] The embodiment also provides a die casting system, which comprises a die casting device, an extrusion device and the die casting mold as above. The die casting device is used to press the metal liquid into the die casting mold, and specifically, the metal liquid is pressed into the die casting mold by the gate sleeve 5. After the metal liquid fills into each region of the cavity, the metal liquid is extruded into the die casting mold by the gate sleeve 5 through the extrusion device until the metal liquid solidifies. Then, the mold is opened, the first mold layer 1 is separated from the second mold layer 2, and then the second mold layer 2 is separated from the third mold layer 3.

[0049] In the description of the present application, it should be understood that the terms "first", "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0050] The above merely preferred embodiments of the present application, it should be noted that for those of ordinary skill in the art, without departing from the principles of the present application, can make several improvements and refinements, these improvements and refinements should also be considered as the scope of protection of the present application.

Claims

1. A die-casting mold characterized by comprising: The first mold layer (1), the second mold layer (2) and the third mold layer (3) are sequentially stacked; The first mold layer (1) and the second mold layer (2) form a horizontal flow channel (4), and the first mold layer (1) is further provided with a gate bush (5) in communication with the horizontal flow channel (4); The second mold layer (2) and the third mold layer (3) form a cavity (6); The horizontal flow channel (4) and the cavity (6) are further communicated with a vertical flow channel (7), and the vertical flow channel (7) penetrates the second mold layer (2) along the thickness direction.

2. The die casting mold according to claim 1, characterized in that, The number of the vertical flow channels (7) is multiple, each of the vertical flow channels (7) is in communication with the horizontal flow channel (4), the cavity (6) is provided with multiple inner gates (9), and the number of the inner gates (9) is the same as that of the vertical flow channels (7) and is in one-to-one correspondence.

3. The die casting mold according to claim 2, characterized in that, The horizontal flow channel (4) includes a main flow channel (41) and a branch flow channel (42), the main flow channel (41) is in communication with the gate bush (5), the branch flow channel (42) is in communication with the vertical flow channel (7), and the main flow channel (41) is in communication with at least two branch flow channels (42).

4. The die casting mold according to claim 3, characterized in that, The number of the main flow channels (41) is at least two, and one end of each of the main flow channels (41) is in communication with the gate bush (5).

5. The die casting mold according to claim 3, characterized in that, At least part of the main flow channels (41) includes a first-level main flow channel (411) and a second-level main flow channel (412) in communication, the first-level main flow channel (411) is in communication with the gate bush (5), and the second-level main flow channel (412) is in communication with the branch flow channel (42). The first-level main flow channel (411) is in communication with at least two second-level main flow channels (412), and the second-level main flow channel (412) is in communication with at least two branch flow channels (42).

6. The die casting mold according to claim 5, characterized in that, At least part of the second-level main flow channel (412) and the branch flow channel (42) further includes a third-level main flow channel, the second-level main flow channel (412) is in communication with at least two third-level main flow channels, and the third-level main flow channel is in communication with at least two branch flow channels (42).

7. The die casting mold according to claim 5 or 6, characterized in that The first-level main flow channel (411) is provided with multiple interfaces (43) in the length direction at intervals, and each of the interfaces (43) is in communication with the corresponding second-level main flow channel (412). The gate bush (5) and the adjacent interface (43) and the adjacent two interfaces (43) form interval sections, respectively, the flow area of the interval section close to the gate bush (5) is greater than that of the interval section away from the gate bush (5).

8. The die casting mold according to any one of claims 2 to 6, characterized in that, The second mold layer (2) is provided with a first-level vertical flow channel (71) penetrating in the thickness direction, the third mold layer (3) is provided with a second-level vertical flow channel (72) on the side facing the second mold layer (2), the second-level vertical flow channel (72) is in communication with the inner gate (9), and the first-level vertical flow channel (71) and the second-level vertical flow channel (72) are in communication to form the vertical flow channel (7).

9. The die casting mold according to any one of claims 1 to 6, characterized in that, The vertical flow channel (7) and the inner gate (9) of the cavity (6) are in communication with a fan-shaped flow channel (8).

10. A die casting system characterized by, Die casting apparatus comprising a die casting mould as claimed in any of the claims 1-9.

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