Local extrusion die structure
By introducing a cooling water channel into the local extrusion mold to cool the extrusion rod and replenishing the molding margin in large parts of the casting thickness, the problem of excessive temperature of the extrusion rod is solved, and the quality of the die casting and the stability of the mold is improved.
Patent Information
- Application Number
- CN202421731573.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-19
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-07-19
AI Technical Summary
The extrusion rods of existing local extrusion molds are located inside the die-casting mold, which is prone to excessive temperature, which affects its normal use or even damage, resulting in shrinkage or air hole defects in large parts of the die-casting.
A partial extrusion die structure is designed, including a moving die, a fixed die, a drive device, a connecting piece, a slider, an extrusion rod and a cooling water channel. The extrusion rod is water-cooled and cooled through the cooling water channel, and the molding margin is added to large parts of the casting thick to avoid defects.
Effectively prevent the extrusion rod temperature from being too high, improve the quality of die castings, extend the service life of the extrusion rod, and ensure the working stability and reliability of the mold.
Smart Images
Figure CN223083796U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of die-casting molds, in particular to a local extrusion mold structure. Background Art
[0002] When using the die-casting process for production, since some parts of the die-castings are relatively thick (the thick parts can reach 10 - 30 mm in thickness), shrinkage cavities or gas holes and other defect problems will occur in the thick parts of the die-castings. Therefore, people usually use a local extrusion mold to compensate for the surplus in the thick parts and carry out pressure forming.
[0003] However, for the local extrusion mold in the prior art, since its extrusion rod is located inside the die-casting forming mold, the extrusion rod is prone to overheating, which in turn affects the normal use of the extrusion rod and even directly damages it. Summary of the Utility Model
[0004] The purpose of the utility model is to provide a local extrusion mold structure, which solves the problem that in the local extrusion mold in the prior art, since its extrusion rod is located inside the die-casting forming mold, the extrusion rod is prone to overheating, which in turn affects the normal use of the extrusion rod and even directly damages it.
[0005] To achieve this purpose, the utility model adopts the following technical solutions:
[0006] A local extrusion mold structure includes a moving mold, a moving mold insert, a moving mold, a fixed mold insert, a driving device, a connecting piece, a slider, an extrusion rod and a cooling water channel;
[0007] A sliding cavity is formed by the combination of the moving mold and the fixed mold. The slider is slidably installed in the sliding cavity. One end of the slider is connected to the connecting piece, and the other end of the slider is connected to the extrusion rod. The driving device is used to drive the connecting piece to move;
[0008] The moving mold insert is installed inside the moving mold, and the fixed mold insert is installed on the fixed mold. A conveying cavity and a casting cavity are formed by the combination of the fixed mold insert and the moving mold insert. The fixed mold is provided with an injection cavity, and the injection cavity communicates with one end of the casting cavity through the conveying cavity;
[0009] The extrusion rod is slidably installed in the fixed mold insert. A pressurizing cavity is formed between the end of the extrusion rod and the casting cavity. The cooling water channel is used to cool down the extrusion rod.
[0010] Furthermore, the cooling water channel includes a first water inlet channel, a second water inlet channel, a third water inlet channel, a first water outlet channel, a second water outlet channel, a third water outlet channel, a water inlet pipe and a water outlet pipe;
[0011] The first water inlet channel, the second water inlet channel, the third water inlet channel, the third water outlet channel, the second water outlet channel, and the first water outlet channel are connected in sequence;
[0012] The first water inlet channel and the first water outlet channel are respectively arranged inside the connecting piece, the second water inlet channel and the second water outlet channel are respectively arranged inside the slider, and the third water inlet channel and the third water outlet channel are respectively arranged in the;
[0013] The water inlet pipe and the water outlet pipe are respectively installed on the connecting piece, the water inlet pipe is communicated with the first water inlet channel, and the water outlet pipe is communicated with the first water outlet channel.
[0014] Specifically, the moving die insert and the fixed die insert are combined to form a limiting cavity when they are closed. First blocking blocks are respectively arranged on the left and right sides of the extrusion rod. The first blocking blocks are located inside the limiting cavity, and the first blocking blocks can abut against the inner bottom surface of the limiting cavity.
[0015] Preferably, second blocking blocks are respectively arranged on the left and right sides of the extrusion rod. The second blocking blocks are located inside the limiting cavity, the second blocking blocks are located above the first blocking blocks, and the second blocking blocks can abut against the inner top surface of the limiting cavity.
[0016] In some embodiments, the volume of the pressurizing cavity is 5%-10% of the volume of the casting cavity.
[0017] Furthermore, the sliding cavity is provided with a first inclined surface, the slider is provided with a second inclined surface, and the second inclined surface can be attached to the first inclined surface.
[0018] Specifically, it further includes a cooling sleeve. The cooling sleeve is sleeved on the outer periphery of the driving device, and the cooling sleeve is used to cool down the driving device.
[0019] Compared with the prior art, one of the above technical solutions has the following beneficial effects:
[0020] Through the moving die, the moving die insert, the fixed die, the fixed die insert, the driving device, the connecting piece, the slider, the extrusion rod, and the cooling water channel, metal liquid is injected into the casting cavity and the pressurizing cavity at the same time, and the metal liquid in the pressurizing cavity is used to supplement the shrinkage allowance of the thick and large parts of the casting formed in the casting cavity, avoiding defects such as shrinkage holes or air holes in the thick and large parts of the die-casting part, achieving the effect of improving the production quality of the die-casting part. Furthermore, through the cooling water channel, the extrusion rod is cooled by water cooling to prevent it from being damaged or unable to work properly due to excessive temperature, achieving the effect of improving the service life of the extrusion rod, and ensuring the working stability and reliability of the local extrusion die structure. Description of the Drawings
[0021] Figure 1 is a schematic structural view of a partial extrusion die structure of one embodiment of the present utility model;
[0022] Figure 2 is a schematic structural view of a cooling water channel of one embodiment of the present utility model;
[0023] Figure 3 is a schematic structural view of a first inclined surface of one embodiment of the present utility model;
[0024] Figure 4 is a schematic structural view of a cooling sleeve of one embodiment of the present utility model;
[0025] Wherein: moving die 1, sliding cavity 101, first inclined surface 1011, conveying cavity 102, casting cavity 103, pressurizing cavity 104, limiting cavity 105, fixed die 2, injection cavity 21, moving die insert 3, fixed die insert 4, driving device 5, cooling sleeve 51, connecting member 6, slider 7, second inclined surface 71, extrusion rod 8, first blocking block 81, second blocking block 82, cooling water channel 9, first water inlet channel 91, second water inlet channel 92, third water inlet channel 93, first water outlet channel 94, second water outlet channel 95, third water outlet channel 96, water inlet pipe 97, water outlet pipe 98. Detailed Embodiment
[0026] The embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for explaining the present utility model and should not be construed as limiting the present utility model.
[0027] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", "inner side", "outer side", "inner end", "outer end", "axial direction", "radial direction", "circumferential direction", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. In addition, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features, used to distinguish and describe features, without order or importance. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is more than two.
[0028] In an embodiment of the present utility model, such as Figures 1-4As shown in the figure, a local extrusion die structure includes a moving die 1, a moving die insert 3, a fixed die 2, a fixed die insert 4, a driving device 5, a connecting piece 6, a slider 7, an extrusion rod 8 and a cooling water channel 9. A sliding cavity 101 is formed by the combination of the moving die 1 and the fixed die 2. The slider 7 is slidably installed in the sliding cavity 101. One end of the slider 7 is connected to the connecting piece 6, and the other end of the slider 7 is connected to the extrusion rod 8. The driving device 5 is used to drive the connecting piece 6 to move. The moving die insert 3 is installed inside the moving die 1, and the fixed die insert 4 is installed on the fixed die 2. A conveying cavity 102 and a casting cavity 103 are formed by the combination of the fixed die insert 4 and the moving die insert 3. The fixed die 2 is provided with an injection cavity 21, and the injection cavity 21 communicates with one end of the casting cavity 103 through the conveying cavity 102. The extrusion rod 8 is slidably installed in the fixed die insert 4, and a pressurizing cavity 104 is formed between the end of the extrusion rod 8 and the casting cavity 103. The cooling water channel 9 is used to cool down the extrusion rod 8.In this embodiment, the casting cavity 103 is the area of the thick and large part of the casting, specifically 10 - 30 mm thick. The driving device 5 is an oil cylinder. During installation, one end of the connecting piece 6 is connected to the output end of the driving device 5, the other end of the connecting piece 6 is connected to one end of the slider 7, the other end of the slider 7 is connected to the extrusion rod 8, and the extrusion rod 8 is slidably installed in the fixed die insert 4. Then, the moving die 1 and the fixed die 2 are clamped. Correspondingly, the moving die insert 3 and the fixed die insert 4 are clamped. During operation, the molten metal is injected through the injection rod and sequentially enters the casting cavity 103 from the injection cavity 21 and the conveying cavity 102. The molten metal fills the casting cavity 103 and the pressurizing cavity 104 formed between the casting cavity 103 and the end of the extrusion rod 8. Then, the output end of the driving device 5 drives the connecting piece 6 to move, and the connecting piece 6 pushes the slider 7 to move downward in the sliding cavity 101, so that the slider 7 squeezes and pressurizes the molten metal in the pressurizing cavity 104 into the casting cavity 103, thereby avoiding defects such as shrinkage cavities or air holes in the thick and large parts of the die-casting parts. Further, the cooling water channel 9 is arranged in the connecting piece 6, the slider 7 and the extrusion rod 8, and the high-temperature heat of the extrusion rod 8 is removed by water cooling to prevent the extrusion rod 8 from being unable to be used normally or damaged due to excessive temperature; through the moving die 1, the moving die insert 3, the fixed die 2, the fixed die insert 4, the driving device 5, the connecting piece 6, the slider 7, the extrusion rod 8 and the cooling water channel 9 of the present application, molten metal is simultaneously injected into the casting cavity 103 and the pressurizing cavity 104, and the molten metal in the pressurizing cavity 104 is used to supplement the shrinkage allowance during the forming of the thick and large parts of the casting formed in the casting cavity 103, avoiding defects such as shrinkage cavities or air holes in the thick and large parts of the die-casting parts, achieving the effect of improving the production quality of die-casting parts. Further, through the cooling water channel 9, the extrusion rod 8 is cooled by water cooling to prevent it from being damaged or unable to work normally due to excessive temperature, achieving the effect of improving the service life of the extrusion rod 8 and ensuring the working stability and reliability of the local extrusion die structure.
[0029] As Figure 2As shown, the cooling water channel 9 includes a first water inlet channel 91, a second water inlet channel 92, a third water inlet channel 93, a first water outlet channel 94, a second water outlet channel 95, a third water outlet channel 96, a water inlet pipe 97 and a water outlet pipe 98; the first water inlet channel 91, the second water inlet channel 92, the third water inlet channel 93, the third water outlet channel 96, the second water outlet channel 95 and the first water outlet channel 94 are connected in sequence; the first water inlet channel 91 and the first water outlet channel 93 are respectively arranged inside the connecting member 6, the second water inlet channel 92 and the second water outlet channel 94 are respectively arranged inside the slider 7, and the third water inlet channel 93 and the third water outlet channel 96 are respectively arranged inside; the water inlet pipe 97 and the water outlet pipe 98 are respectively installed on the connecting member 6, the water inlet pipe 97 is communicated with the first water inlet channel 91, and the water outlet pipe 98 is communicated with the first water outlet channel 94. In this embodiment, the water inlet pipe 97 and the water outlet pipe 98 are respectively installed on both sides of the connecting member 6, one end of the first water inlet channel 91 is communicated with the water inlet pipe 97, the other end of the first water inlet channel 91 is communicated with one end of the second water inlet channel 92, the other end of the second water inlet channel 92 is communicated with one end of the third water inlet channel 93, the other end of the third water inlet channel 93 is communicated with one end of the third water outlet channel 96, the other end of the third water outlet channel 96 is communicated with one end of the second water outlet channel 95, the other end of the second water outlet channel 95 is communicated with one end of the first water outlet channel 91, and the other end of the first water outlet channel 91 is communicated with the water outlet pipe 98. During operation, cooling water enters the inside of the connecting member 6 from the water inlet pipe 97 and sequentially flows through the first water inlet channel 91, the second water inlet channel 92, the third water inlet channel 93, the first water outlet channel 94, the second water outlet channel 95 and the third water outlet channel 96, and then flows out from the water outlet pipe 98, thereby taking away the heat of the extrusion rod 8 and preventing its temperature from being too high. Further, because the temperature of the die-casting mold and the die-casting environment is relatively high, the cooling water channel 9 can also cool the slider 7 and the connecting member 6 to ensure the reliability and stability of their operation.
[0030] As Figures 1-2As shown, a limiting cavity 105 is formed by the combination of the moving die insert 3 and the fixed die insert 4. First blocking blocks 81 are respectively arranged on the left and right sides of the extrusion rod 8. The first blocking blocks 81 are located in the limiting cavity 105, and the first blocking blocks 81 can abut against the inner bottom surface of the limiting cavity 105. In this embodiment, the limiting cavity 105 is located below the sliding cavity 101, and the limiting cavity 105 communicates with the sliding cavity 101. During operation, the driving device 5 drives the connecting piece 6 to move, the connecting piece 6 pushes the slider 7 downward, the slider 7 pushes the extrusion rod 8 downward, and the extrusion rod 8 drives the first blocking blocks 81 on its left and right sides to move downward until the bottom surface of the first blocking block 81 fits against the inner bottom surface of the limiting cavity 105. At this time, the extrusion rod 8 cannot move downward. The first blocking blocks 81 and the limiting cavity 105 play a role of limiting and blocking, preventing the formed casting part in the casting cavity 103 from being deformed due to excessive downward movement of the extrusion rod 8 and not meeting the requirements, thereby being beneficial to improving the production quality of the casting.
[0031] As Figures 1-2 shown, second blocking blocks 82 are respectively arranged on the left and right sides of the extrusion rod 8. The second blocking blocks 82 are located in the limiting cavity 105, the second blocking blocks 82 are located above the first blocking blocks 81, and the second blocking blocks 82 can abut against the inner top surface of the limiting cavity 105. In this embodiment, during the process of the driving device 5 driving the extrusion rod 8 to reset, the extrusion rod 8 drives the second blocking blocks 82 on its left and right sides to move upward until the top surface of the extrusion rod 8 abuts against the inner top surface of the limiting cavity 105, which proves that the extrusion rod 8 has been reset in place. Through the limiting and blocking effects of the second blocking blocks 82 and the limiting cavity 105, it is prevented that the extrusion rod 8 is reset excessively, resulting in an overly large volume of the pressurizing cavity 104 and too much molten metal added next time, thus affecting the normal forming of the casting.
[0032] As Figure 1 shown, the volume of the pressurizing cavity 104 is 5% - 10% of the volume of the casting cavity 103. In this embodiment, the volume of the pressurizing cavity 104 is set to be 5% - 10% of the volume of the casting cavity 103, preferably 7.5%, so as to ensure that there are no shrinkage cavities or pores and other defects when the thick and large parts of the casting are formed, and it can also prevent excessive or insufficient compensation of molten metal.
[0033] As Figures 2-3As shown, the sliding cavity 101 is provided with a first inclined surface 1011, and the slider 7 is provided with a second inclined surface 71, and the second inclined surface 71 can be attached to the first inclined surface 1011. In this embodiment, the first inclined surface 1011 is provided on the left and right inner sides of the sliding cavity 101, and the second inclined surface 71 is provided on the left and right outer sides of the slider 7. During the reset process of the slider 7, when the second inclined surface 71 is attached to the first inclined surface 1011, the slider 7 is reset in place, that is, the extrusion rod 8 is also reset in place. Moreover, the interaction between the two inclined surfaces not only facilitates the attachment and makes the integrity of the mold better, but also the cooperation between the two plays a role in blocking and limiting, thereby reducing the force on the second blocking block 82 and preventing the second blocking block 82 from breaking.
[0034] As Figure 4 shown, it further includes a cooling sleeve 51, and the cooling sleeve 51 is sleeved on the outer periphery of the driving device 5, and the cooling sleeve 51 is used to cool down the driving device 5. In this embodiment, a cooling water channel is provided inside the cooling sleeve 51, and the cooling sleeve 51 uses the water cooling method to take away the heat of the driving device 5, so as to achieve the purpose of cooling down and avoid the oil cylinder from not working properly due to excessive temperature.
[0035] In the description of this specification, the descriptions with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0036] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the claims and their equivalents.
Claims
1. A local extrusion die structure, characterized in that: It includes a moving mold, a fixed mold, a moving mold insert, a fixed mold insert, a driving device, a connecting piece, a slider, an extrusion rod and a cooling water channel; The moving mold and the fixed mold are closed to form a sliding cavity. The slider is slidably installed in the sliding cavity. One end of the slider is connected to the connecting piece, and the other end of the slider is connected to the extrusion rod. The driving device is used to drive the connecting piece to move; The moving mold insert is installed inside the moving mold, and the fixed mold insert is installed on the fixed mold. The fixed mold insert and the moving mold insert are closed to form a conveying cavity and a casting cavity. The fixed mold is provided with an injection cavity, and the injection cavity communicates with one end of the casting cavity through the conveying cavity; The extrusion rod is slidably installed in the fixed mold insert. A pressurizing cavity is formed between the end of the extrusion rod and the casting cavity. The cooling water channel is used to cool the extrusion rod.
2. The local extrusion die structure according to claim 1, characterized in that: The cooling water channel includes a first water inlet channel, a second water inlet channel, a third water inlet channel, a first water outlet channel, a second water outlet channel, a third water outlet channel, a water inlet pipe and a water outlet pipe; The first water inlet channel, the second water inlet channel, the third water inlet channel, the third water outlet channel, the second water outlet channel and the first water outlet channel are connected in sequence; The first water inlet channel and the first water outlet channel are respectively arranged inside the connecting piece. The second water inlet channel and the second water outlet channel are respectively arranged inside the slider. The third water inlet channel and the third water outlet channel are respectively arranged in the...; The water inlet pipe and the water outlet pipe are respectively installed on the connecting piece. The water inlet pipe communicates with the first water inlet channel, and the water outlet pipe communicates with the first water outlet channel.
3. A local extrusion die structure according to claim 1, characterized in that: The moving mold insert and the fixed mold insert are closed to form a limiting cavity. First blocking blocks are respectively arranged on the left and right sides of the extrusion rod. The first blocking blocks are located in the limiting cavity, and the first blocking blocks can abut against the inner bottom surface of the limiting cavity.
4. A local extrusion die structure according to claim 3, characterized in that: Second blocking blocks are respectively arranged on the left and right sides of the extrusion rod. The second blocking blocks are located in the limiting cavity. The second blocking blocks are located above the first blocking blocks, and the second blocking blocks can abut against the inner top surface of the limiting cavity.
5. A local extrusion die structure according to claim 1, characterized in that: The volume of the pressurizing cavity is 5%-10% of the volume of the casting cavity.
6. The partial extrusion die structure according to claim 1, characterized in that: The sliding cavity is provided with a first inclined surface, and the slider is provided with a second inclined surface. The second inclined surface can be attached to the first inclined surface.
7. A local extrusion die structure according to claim 1, characterized in that: It further includes a cooling sleeve. The cooling sleeve is sleeved on the outer periphery of the driving device. The cooling sleeve is used to cool the driving device.