Die-casting mould for a housing

Abstract

The present application relates to the technical field of die casting mould, and provides a die casting mould for a shell, which comprises a fixed mould assembly, a movable mould assembly, a slider mechanism and a runner assembly. The runner assembly comprises a feeding sleeve and a main runner. One end of the main runner has at least three first intersection points with a product cavity. A flow resistance block is arranged on the main runner formed between the first intersection point in the middle position and a feeding port, and the flow resistance block is used for reducing the feeding speed of the main runner in the middle position. A branch runner is arranged on the side wall of the movable mould assembly and / or the slider along the moving direction of the movable mould assembly. The upper end of the branch runner is communicated with the main runner, and the lower part of the branch runner has at least one second intersection point with the product cavity. Compared with the prior art, the die casting mould has the advantages that the upper and lower parts of the shell can be simultaneously fed in the vertical direction through the cooperation of the main runner and the branch runner, and thus the die casting defects such as material shortage, air hole and shrinkage hole of the shell can be prevented.

Description

Technical Field

[0001] This invention relates to the field of die-casting mold technology, specifically to a die-casting mold for housings. Background Technology

[0002] Among automotive parts, the housing is a common and important mechanical component. It serves to isolate and seal the exterior from the outside world and absorb various forces during the operation of the internal mechanical structures. Most housings are cast using die casting. For housings with high dimensional accuracy requirements, they are usually machined on machine tools after the casting process to improve the dimensional accuracy and make them meet the requirements of the drawings.

[0003] like Figure 1 The shell shown is also manufactured through casting and machining. However, due to its thick walls and high height, the filling time during the shell filling process is relatively long. This causes the molten metal to cool prematurely, resulting in incomplete filling of the final filling positions. Consequently, die-casting defects such as material shortages, porosity, and shrinkage cavities occur, and these defects are difficult to eliminate by adjusting the parameters of the die-casting machine. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a die-casting mold for housings, in view of the current state of the prior art.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: A die-casting mold for a housing is proposed, comprising: a fixed mold assembly, a moving mold assembly, a slider mechanism, and a runner assembly. The moving mold assembly is movably disposed below the fixed mold assembly, and when the fixed mold assembly and the moving mold assembly are in contact, a product cavity is formed between the fixed mold assembly and the moving mold assembly. The slider mechanism has a slider movably disposed on the moving mold assembly, one end of which is inserted into the product cavity and forms the side profile of the product. The runner assembly includes:

[0006] A feed sleeve is inserted into the fixed mold assembly along the thickness direction of the fixed mold assembly;

[0007] The main channel is radially arranged on the fixed mold assembly. One end of the main channel converges at the lower end of the feed sleeve. The other end of the main channel has at least three first intersection points with the product cavity. A flow-blocking block is provided on the main channel formed between the first intersection point in the middle position and the feed port. The flow-blocking block is used to reduce the feeding speed of the main channel in the middle position.

[0008] A runner is disposed on the side wall of the moving mold assembly and / or the slider along the moving direction of the moving mold assembly. The upper end of the runner is connected to the main runner, and the lower part of the runner has at least one second intersection point with the product cavity.

[0009] In the aforementioned die-casting mold for a housing, the cross-section of the flow-blocking block is an isosceles trapezoid, and the transition portion between the flow-blocking block and the main flow channel is a rounded transition.

[0010] In the aforementioned die-casting mold for a housing, a moving mold core is provided on the moving mold assembly. The moving mold core is inserted into the product cavity and forms a hole-like structure in the housing. A cavity insert is embedded on the moving mold core.

[0011] In the aforementioned die-casting mold for a housing, an annular arc-shaped cold slug groove is provided at the upper end of the moving mold core block, and a connecting groove is provided on the moving mold assembly, the connecting groove being used to connect the cold slug groove to the product cavity.

[0012] In one of the die-casting molds for housings described above, the sidewall of the connecting groove is provided with a first inclined surface.

[0013] In the aforementioned die-casting mold for a housing, the moving mold assembly includes a moving mold cavity block for supporting the slider. The bottom of the moving mold cavity block is provided with a plurality of slag bags communicating with the product cavity. Each slag bag is connected through a bottom connecting groove. The upper end of the moving mold assembly is provided with an venting block. The side wall of the moving mold cavity block is provided with a side connecting groove, and the two ends of the side connecting groove are respectively connected to the bottom connecting groove and the venting block.

[0014] In one of the die-casting molds for a shell, the slag bag is provided with a second inclined surface near the product cavity, and a plurality of grooves are provided on the second inclined surface.

[0015] Compared with the prior art, the advantages of the present invention are that by cooperating with the main channel and the branch channels, the upper and lower parts of the shell can be fed simultaneously in the vertical direction, thereby preventing die casting defects such as material shortage, porosity, and shrinkage cavities from appearing in the shell. By setting the main channel in a radial shape and setting a flow-blocking block in the main channel located in the middle position, the feeding speed of the main channel located in the middle position can be effectively slowed down, thereby enabling each main channel to achieve the same feeding speed, and ultimately achieving the purpose of balanced feeding. Attached Figure Description

[0016] Figure 1 This is a 3D view of the shell and the material head when they are bonded together;

[0017] Figure 2 This is a perspective view of a die-casting mold for a housing according to the present invention;

[0018] Figure 3 It is a 3D view of the fixed mold assembly;

[0019] Figure 4 yes Figure 2 3D view with the fixed mold components removed;

[0020] Figure 5 It is a three-dimensional view of the moving model cavity block;

[0021] Figure 6 It is a 3D image of the slider.

[0022] In the diagram, 1. Fixed mold assembly; 2. Moving mold assembly; 3. Slider mechanism; 4. Feed sleeve; 5. Main runner; 6. First junction point; 7. Flow blocking block; 8. Diverter runner; 9. Second junction point; 10. Moving mold cavity block; 11. Cavity insert; 12. Cold slug groove; 13. Connecting groove; 14. First inclined surface; 15. Slag bag; 16. Bottom connecting groove; 17. Venting block; 18. Side connecting groove; 19. Second inclined surface; 20. Groove. Detailed Implementation

[0023] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0024] like Figures 1 to 6 As shown, a die-casting mold for a housing according to the present invention includes: a fixed mold assembly 1, a moving mold assembly 2, a slider mechanism 3, and a runner assembly. The moving mold assembly 2 is movably disposed below the fixed mold assembly 1, and when the fixed mold assembly 1 and the moving mold assembly 2 are in contact, a product cavity is formed between the fixed mold assembly 1 and the moving mold assembly 2. The slider mechanism 3 has a slider movably disposed on the moving mold assembly 2, one end of which is inserted into the product cavity and forms the side shape of the product. The runner assembly includes: a feed sleeve 4, which is inserted into the fixed mold assembly 1 along the thickness direction of the fixed mold assembly 1. Main channel 5, which is radially arranged on the fixed mold assembly 1, one end of the main channel 5 converges at the lower end of the feed sleeve 4, and the other end of the main channel 5 has at least three first intersection points 6 with the product cavity, and a flow blocking block 7 is provided on the main channel 5 formed between the first intersection point 6 in the middle position and the feed port. The flow blocking block 7 is used to reduce the feeding speed of the main channel 5 in the middle position; branch channel 8, which is arranged on the side wall of the moving mold assembly 2 and / or the slider along the moving direction of the moving mold assembly 2, the upper end of the branch channel 8 communicates with the main channel 5, and the lower part of the branch channel 8 has at least one second intersection point 9 with the product cavity.

[0025] During die casting, the die casting mold is fixed on the die casting machine. The die casting machine drives the moving mold assembly 2 to move relative to the fixed mold assembly 1 to complete the opening and closing action of the die casting mold. After the moving mold assembly 2 and the fixed mold assembly 1 are in contact, the die casting machine injects molten metal from the feeding assembly into the product cavity. When the molten metal flows in the feeding assembly, it first passes through the feeding sleeve 4 and then flows into the main channel 5. A portion of the molten metal flowing into the main channel 5 flows into the first confluence point 6 through the radial main channels 5. Finally, it enters the product cavity, and another part goes deep into the lower part of the product cavity through the branch channel 8. Finally, it enters the product cavity through the second junction point 9 and fills the lower structure of the product cavity. This feeding method allows the shell to be fed into the upper and lower parts of the shell in the vertical direction at the same time when the shell is formed in the product cavity, thereby preventing die casting defects such as material shortage, air holes, and shrinkage cavities. Setting the main channel 5 in a radial shape and setting the flow block 7 in the main channel 5 located in the middle position can effectively slow down the feeding speed of the main channel 5 located in the middle position, thereby enabling each main channel 5 to achieve the same feeding speed, and ultimately achieving the purpose of balanced feeding. After the shell is removed from the die casting mold, the setting of the first junction point 6 and the second junction point 9 can facilitate the separation of the shell from the material head on the flow channel, thereby facilitating the subsequent processing of the shell.

[0026] Furthermore, the cross-section of the flow-blocking block 7 is an isosceles trapezoid, and the transition between the flow-blocking block 7 and the main flow channel 5 is a rounded transition.

[0027] The cross-section of the flow-blocking block 7 is set as an isosceles trapezoid, so that the flow-blocking block 7 can block the feeding speed of the main channel 5 in the middle position, while making the molten metal flow more smoothly in the main channel 5, preventing the molten metal from flowing back in the main channel 5, and thus preventing the molten metal from incorporating more air in the main channel 5. The rounded transition between the flow-blocking block 7 and the main channel 5 can effectively reduce the adhesion force between the material head on the main channel 5 and the main channel 5, thereby preventing the material head from sticking to the main channel 5 when the moving mold assembly 2 and the fixed mold assembly 1 separate.

[0028] Furthermore, the moving mold assembly 2 is provided with a moving mold core block, which is inserted into the product cavity and forms a hole-like structure of the shell. A cavity insert 11 is embedded on the moving mold core block.

[0029] The cavity insert 11 set on the moving mold core block allows the gas in the product cavity to be discharged from the mold through the gap between the cavity insert 11 and the moving mold core block, thereby further preventing die casting defects such as material shortage, air holes, and shrinkage cavities in the shell.

[0030] Furthermore, the upper end of the moving mold core is provided with an annular arc-shaped cold slug groove 12, and the moving mold assembly 2 is provided with a connecting groove 13, which is used to connect the cold slug groove 12 and the product cavity.

[0031] When the molten metal fills the product cavity, it drives out the gas inside the product cavity. Some of this gas will be discharged from the die-casting cavity, while the rest will remain inside the product cavity. When the amount of gas remaining in the product cavity reaches a certain level, it will cause die-casting defects such as material shortage, porosity, and shrinkage cavities in the shell. The cold slug groove 12 set on the moving mold core can be used to store this part of the gas remaining in the product cavity, thereby ensuring the die-casting quality of the shell.

[0032] Furthermore, the side wall of the connecting groove 13 is provided with a first inclined surface 14. The first inclined surface 14 on the connecting groove 13 makes it easier for the material head located in the connecting groove 13 to break when the shell and the material head are separated in the future, thereby preventing the shell from having a gap.

[0033] Furthermore, the moving mold assembly 2 includes a moving mold cavity block 10 for supporting the slider. The bottom of the moving mold cavity block 10 is provided with a plurality of slag bags 15 that communicate with the product cavity. Each slag bag 15 is connected through a bottom connecting groove 16. The upper end of the moving mold assembly 2 is provided with an exhaust block 17. The side wall of the moving mold cavity block 10 is provided with a side connecting groove 13. The two ends of the side connecting groove 13 are respectively connected to the bottom connecting groove 16 and the exhaust block 17.

[0034] During and after the product cavity filling process, the slag bag 15, bottom connecting groove 16, side connecting groove 13, and venting block 17 can be used to discharge residual gas in the product cavity. In addition, they can also discharge the molten metal that has cooled during the flow process that first enters the product cavity. By placing the venting block 17 at the upper end of the moving mold assembly 2 and the slag bag 15 at the bottom end of the moving mold cavity block 10, the molten metal discharged from the product cavity can be slowed down, thereby preventing it from splashing out of the die-casting mold.

[0035] Furthermore, the slag bag 15 is provided with a second inclined surface 19 near the product cavity, and a number of grooves 20 are provided on the second inclined surface 19.

[0036] The second inclined surface 19 facilitates the separation of the material head inside the slag bag 15 from the shell. The groove 20 provided on the second inclined surface 19 is used to increase the wall thickness of the material head inside the slag bag 15, thereby preventing the material head from breaking in the die casting mold during the demolding process due to insufficient structural strength when it separates from the die casting mold.

[0037] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0038] Furthermore, in this invention, descriptions involving terms such as "first," "second," and "a" are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0039] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0040] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0041] The specific embodiments described herein are merely illustrative examples illustrating the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the scope defined by the spirit of the invention.

Claims

1. A die-casting mold for a housing, comprising: The system comprises a fixed mold assembly, a moving mold assembly, a slider mechanism, and a runner assembly. The moving mold assembly is movably disposed below the fixed mold assembly, and when the fixed mold assembly and the moving mold assembly are in contact, a product cavity is formed between the fixed mold assembly and the moving mold assembly. The slider mechanism has a slider movably disposed on the moving mold assembly, one end of which is inserted into the product cavity and forms the side profile of the product. The runner assembly includes: A feed sleeve is inserted into the fixed mold assembly along the thickness direction of the fixed mold assembly; The main channel is radially arranged on the fixed mold assembly. One end of the main channel converges at the lower end of the feed sleeve. The other end of the main channel has at least three first intersection points with the product cavity. A flow-blocking block is provided on the main channel formed between the first intersection point in the middle position and the feed port. The flow-blocking block is used to reduce the feeding speed of the main channel in the middle position. A runner is disposed on the side wall of the moving mold assembly and / or the slider along the moving direction of the moving mold assembly. The upper end of the runner is connected to the main runner, and the lower part of the runner has at least one second intersection point with the product cavity.

2. The die-casting mold for a housing as described in claim 1, characterized in that, The cross-section of the flow-blocking block is an isosceles trapezoid, and the transition between the flow-blocking block and the main flow channel is a rounded transition.

3. A die-casting mold for a housing as described in claim 1, characterized in that, The moving mold assembly is provided with a moving mold core block, which is inserted into the product cavity and forms a hole-like structure in the shell. A cavity insert is embedded in the moving mold core block.

4. A die-casting mold for a housing as described in claim 3, characterized in that, The upper end of the moving mold core is provided with an annular arc-shaped cold material groove, and the moving mold assembly is provided with a connecting groove for connecting the cold material groove and the product cavity.

5. A die-casting mold for a housing as described in claim 4, characterized in that, The sidewall of the connecting groove is provided with a first inclined surface.

6. A die-casting mold for a housing as described in claim 1, characterized in that, The moving mold assembly includes a moving mold cavity block for supporting the slider. The bottom of the moving mold cavity block is provided with a plurality of slag bags communicating with the product cavity. Each slag bag is connected through a bottom connecting groove. The upper end of the moving mold assembly is provided with an exhaust block. The side wall of the moving mold cavity block is provided with a side connecting groove. The two ends of the side connecting groove are respectively connected to the bottom connecting groove and the exhaust block.

7. A die-casting mold for a housing as described in claim 6, characterized in that, The slag bag is provided with a second inclined surface near the product cavity, and a number of grooves are provided on the second inclined surface.

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