Die-casting die exhaust structure and die

Abstract

The utility model provides a die-casting die exhaust structure and a die, and relates to the technical field of dies, the exhaust structure is arranged between a movable die and a fixed die, the exhaust structure comprises an exhaust base and a cover plate, the exhaust base is fixed on the fixed die, and a plurality of exhaust holes are arranged on the exhaust base; the cover plate is arranged on the exhaust base, and an air cavity is formed between the cover plate and the exhaust base. An air entraining channel is formed in the fixed mold, and when the cover plate is arranged on the exhaust base, the cover plate partially covers the air entraining channel and seals the air entraining channel; one end of the air entraining channel is communicated with the air cavity, and the other end is communicated with a cavity of the mold. The die-casting die exhaust structure can exhaust air in the die cavity in the die-casting process, the situation that the manufacturing quality of products is affected by the air is avoided, and the overall quality of the products is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, in particular to an exhaust structure and a mold for die-casting molds. Background Technique

[0002] In the technical field of die-casting molds, especially for complex multi-cavity molds, how to effectively exhaust the gas inside the mold has always been a key problem in the manufacturing process. In the forming process of traditional die-casting molds, due to the complex mold structure and poor exhaust, slag pockets often appear inside the mold, and these slag pockets cannot be connected to the outside in time, thus hindering the effective exhaust of gas. This not only leads to poor product forming, such as defects like bubbles and shrinkage cavities, but also greatly reduces the product yield and production efficiency, and further significantly increases the production cost.

[0003] The prior art CN115007834A discloses a shell die-casting mold with an internal exhaust function for producing a shell with a positioning hole in the middle part. The mold includes: a fixed mold assembly with an upper cavity block provided thereon; a moving mold assembly movably arranged below the fixed mold assembly, with a lower cavity block provided on the moving mold assembly; a slider mechanism slidably arranged on the moving mold assembly, and a main cavity is formed between the upper cavity block, the lower cavity block and the slider mechanism; an exhaust mechanism with an exhaust pin, and the exhaust pin is inserted in the fixed mold assembly and located directly above the positioning hole. This mold discharges the residual gas near the positioning hole through the exhaust pin in the fixed mold assembly, and finally prevents die-casting defects such as material shortage, air holes, and shrinkage cavities from occurring at the position of the positioning hole of the shell.

[0004] However, the exhaust effect of the structure exhausting gas through the positioning pin is limited and still has certain limitations. Content of the Utility Model

[0005] To overcome the problems existing in the related art, one of the purposes of the utility model is to provide an exhaust structure for a die-casting mold, which can exhaust the air in the cavity during the die-casting process, avoid the influence of gas on the manufacturing quality of the product, and improve the overall quality of the product.

[0006] An exhaust structure for a die-casting mold is arranged between the moving mold and the fixed mold and includes:

[0007] An exhaust base and a cover plate. The exhaust base is fixed on the fixed mold, and a plurality of exhaust holes are provided on the exhaust base; the cover plate is arranged on the exhaust base, and an air cavity is formed between the cover plate and the exhaust base;

[0008] An air-introducing channel is provided on the fixed mold. When the cover plate is disposed on the exhaust base, a part of the cover plate covers the air-introducing channel and seals the air-introducing channel. One end of the air-introducing channel is communicated with an air cavity, and the other end is communicated with the cavity of the mold.

[0009] In a preferred technical solution of the present invention, the air-introducing channel is provided on one side of the exhaust base, and a plurality of buffer cavities are provided in the air-introducing channel.

[0010] In a preferred technical solution of the present invention, two cavities of the mold are provided, and the two cavities are respectively located on opposite sides of the exhaust base of the mold.

[0011] The air-introducing channel has two air inlet ends and one air outlet end. Two of the air inlet ends are respectively connected to the two cavities, and the air outlet end is connected to the exhaust base.

[0012] In a preferred technical solution of the present invention, a plurality of mounting holes are provided on the exhaust base, and the exhaust base is fixed on the fixed mold by screws passing through the mounting holes.

[0013] In a preferred technical solution of the present invention, a plurality of ridges are provided on the exhaust base, and grooves opposite to the ridges are provided on the cover plate. When the cover plate is disposed on the exhaust base, an overflow channel is formed between the ridges and the grooves, and the overflow channel is communicated with the exhaust hole.

[0014] In a preferred technical solution of the present invention, the protruding height of the ridge is 1-3 cm.

[0015] A second object of the present invention is to provide a die-casting mold, including a movable mold and a fixed mold. The movable mold is disposed on the fixed mold, and the die-casting mold exhaust structure as described above is provided between the movable mold and the fixed mold.

[0016] In a preferred technical solution of the present invention, a mounting seat is provided on one side of the fixed mold, and a core-pulling oil cylinder is provided on the mounting seat.

[0017] The beneficial effects of the present invention are as follows:

[0018] An exhaust structure for a die-casting mold provided by the utility model is arranged between a moving mold and a fixed mold and includes an exhaust base and a cover plate. The exhaust base is fixed on the fixed mold, and a plurality of exhaust holes are arranged on the exhaust base; the cover plate is arranged on the exhaust base, and an air cavity is formed between the cover plate and the exhaust base. An air guiding channel is arranged on the fixed mold. When the cover plate is arranged on the exhaust base, a part of the cover plate covers the air guiding channel and seals the air guiding channel; one end of the air guiding channel is communicated with the air cavity, and the other end is communicated with the cavity of the mold. During the use of this exhaust structure, the air cavity formed by the combination of the cover plate and the exhaust base is in an initial state. When the die-casting machine starts to work, molten metal is injected into the mold cavity. At the same time, the air in the cavity is compressed and quickly enters the air cavity through the air guiding channel. Due to the sealing effect of the cover plate on the air guiding channel, the gas is effectively confined in the air cavity and gradually discharged outside the mold through the exhaust holes on the exhaust base, thereby avoiding the adverse effects caused by the gas on the product during die-casting. This exhaust device can effectively exhaust the air in the mold cavity through an efficient exhaust structure, reduce the generation of defects such as pores and bubbles, and significantly improve the appearance quality and mechanical properties of the product. Since the rejection rate caused by gas problems is reduced and the first-pass qualification rate of the product is improved, the production rhythm is accelerated and the overall production efficiency is enhanced.

[0019] This application also provides a mold including the above exhaust structure. During the manufacturing process of this mold, it can exhaust the air in the cavity, avoid the situation of poor product molding caused by the existence of gas, improve the yield rate of the product, and reduce the manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A perspective view of the exhaust structure provided in the embodiment of this application arranged on the fixed mold;

[0021] Figure 2 is Figure 1 the top view of;

[0022] Figure 3 A perspective view of the exhaust structure without the cover plate provided in the embodiment of this application arranged on the fixed mold;

[0023] Figure 4 is Figure 3 the partial enlarged view at A in;

[0024] Figure 5 A cross-sectional view of the exhaust structure provided in the embodiment of this application arranged on the fixed mold;

[0025] Figure 6 A schematic structural view of the die-casting mold provided in the embodiment of this application.

[0026] Reference Signs:

[0027] 1. Cover plate; 11. Groove; 2. Exhaust base; 21. Rib; 22. Exhaust hole; 23. Mounting hole; 3. Air guiding channel; 31. Buffer cavity; 4. Pin; 5. Cavity; 100. Fixed mold; 200. Movable mold; 300. Mounting seat; 400. Core pulling oil cylinder. Specific embodiments

[0028] The preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the preferred embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to convey the scope of the present invention fully to those skilled in the art. d

[0029] The terms used in the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The singular forms "a", "the", and "the" used in the present invention and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

[0030] It should be understood that although the terms "first", "second", "third", etc. may be used in the present invention to describe various information, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, the features defined by "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "plural" means two or more unless otherwise specifically defined.

[0031] In the field of die-casting mold technology, especially for complex multi-cavity molds, how to effectively exhaust the gas inside the mold has always been a key problem in the manufacturing process. In the traditional die-casting mold during the molding process, due to the complex mold structure and poor exhaust, slag pockets often appear inside the mold, and these slag pockets cannot be connected to the outside in time, thus hindering the effective exhaust of gas. This not only causes poor product molding, such as defects like bubbles and shrinkage cavities, but also greatly reduces the product yield and production efficiency, and further significantly increases the production cost.

[0032] Based on this, the present application provides an exhaust structure for a die-casting mold.

[0033] Embodiment 1

[0034] See Figures 1 to 5 As shown, a die-casting mold exhaust structure includes:

[0035] An exhaust base 2 and a cover plate 1. The exhaust base 2 is fixed on the fixed mold 100, and a plurality of exhaust holes 22 are provided on the exhaust base 2; the cover plate 1 is arranged on the exhaust base 2, and an air cavity is formed between the cover plate 1 and the exhaust base 2;

[0036] An air guiding channel 3 is provided on the fixed mold 100. When the cover plate 1 is arranged on the exhaust base 2, a part of the cover plate 1 covers the air guiding channel 3 and seals the air guiding channel 3; one end of the air guiding channel 3 is communicated with the air cavity, and the other end is communicated with the cavity 5 of the mold.

[0037] Specifically, the exhaust base 2 is made of a high-strength and high-temperature-resistant alloy material to ensure that it can withstand high pressure and high-temperature environments during die-casting. The exhaust base 2 is fixedly installed at a specified position on the fixed mold 100. The exhaust holes 22 are communicated with the air cavity and can discharge the air in the air cavity to the outside of the mold. The cover plate 1 is closely attached to the exhaust base 2, thereby forming a closed air cavity on the exhaust base 2. The cover plate 1 is designed with a shape corresponding to the air guiding channel 3 so as to partially cover and seal the air guiding channel 3 during installation.

[0038] For the above die-casting mold exhaust structure, during the use of the die-casting mold, the air cavity formed by the combination of the cover plate 1 and the exhaust base 2 is in an initial state. When the die-casting machine starts to work, the molten metal liquid is injected into the mold cavity 5. At the same time, the air in the cavity 5 is squeezed and quickly enters the air cavity through the air guiding channel 3. Due to the sealing effect of the cover plate 1 on the air guiding channel 3, the gas is effectively restricted in the air cavity and gradually discharged to the outside of the mold through the exhaust holes 22 on the exhaust base 2, thereby avoiding the adverse effects caused by the gas on the product during die-casting. This exhaust device can effectively discharge the air in the cavity 5 during die-casting through an efficient exhaust structure, reduce the generation of defects such as pores and bubbles, and significantly improve the appearance quality and mechanical properties of the product. Since the reject rate caused by gas problems is reduced and the first-pass qualification rate of the product is improved, the production rhythm is accelerated and the overall production efficiency is increased.

[0039] In an embodiment, the air guiding channel 3 is arranged on one side of the exhaust base 2, and a plurality of buffer cavities 31 are provided in the air guiding channel 3.

[0040] The air-introducing channel 3 is arranged on one side of the exhaust base 2, and several buffer cavities 31 are designed. Such a layout helps to guide the gas to flow along a more orderly and smoother path. The existence of the buffer cavities 31 can slow down the gas flow rate, reduce the phenomena of turbulence and eddy current, thereby reducing the impact of the gas on the mold and the product. As a temporary storage space for the gas, the buffer cavities 31 can quickly absorb a large amount of gas in the cavity 5 at the initial stage of die casting, avoiding the accumulation of gas in the mold and causing pressure increase. As the die casting process progresses, the gas in the buffer cavities 31 gradually discharges through the exhaust holes 22, ensuring the continuity and stability of the exhaust process.

[0041] In another embodiment, two cavities 5 of the mold are provided, and the two cavities 5 are respectively located on opposite sides of the exhaust base 2 of the mold;

[0042] The air-introducing channel 3 has two intake ends and one outlet end. Among them, the two intake ends are respectively connected to the two cavities 5, and the outlet end is connected to the exhaust base 2.

[0043] In this embodiment, by providing two cavities 5, two products can be formed at one time, thereby improving the manufacturing efficiency of the products. By providing two intake ends respectively connected to the two cavities 5, it is ensured that each cavity 5 can exhaust independently and effectively during the die casting process. This design avoids the accumulation and uneven distribution of gas in the mold, improving the efficiency and uniformity of exhaust. The design of the two cavities 5 makes full use of the space of the mold. The two cavities 5 are reasonably arranged on both sides of the exhaust base 2, which not only ensures the effectiveness of exhaust but also saves the overall space of the mold. This makes the mold more compact and efficient, facilitating production operation and maintenance.

[0044] Furthermore, a plurality of mounting holes 23 are provided on the exhaust base 2, and the exhaust base 2 is fixed on the fixed mold 100 by screws passing through the mounting holes 23.

[0045] By the combined use of multiple mounting holes 23 and screws, it can be ensured that the exhaust base 2 is firmly fixed on the fixed mold 100. This multi-point fixing method can effectively disperse the pressure and vibration generated during the die casting process, preventing the exhaust base 2 from loosening or shifting, thereby enhancing the overall stability of the mold.

[0046] Furthermore, a plurality of convex strips 21 are provided on the exhaust base 2, and grooves 11 opposite to the convex strips 21 are provided on the cover plate 1. When the cover plate 1 is arranged on the exhaust base 2, an overflow channel is formed between the convex strips 21 and the grooves 11, and the overflow channel is communicated with the exhaust holes 22. Further, the protruding height of the convex strips 21 is 1 - 3 cm.

[0047] The flow passage formed between the rib 21 and the groove 11 can not only enable the air cavity to discharge the air in the cavity 5 to the outside, but also increase the structural strength of the exhaust base 2 and the cover plate 1, and extend the service life of the exhaust structure. In addition, the flow channels formed between multiple ribs 21 and multiple grooves 11 can extend the gas flow path in the air cavity, avoiding problems such as backflow of molten metal, erosion of the mold cavity, shape distortion of the product, surface roughness, and even cold cracking caused by too high exhaust speed.

[0048] Embodiment 2

[0049] See Figures 1 to 6 As shown, this embodiment provides a die-casting mold, including a moving die 200 and a fixed die 100. The moving die 200 is arranged on the fixed die 100, and the die-casting mold exhaust structure as described above is arranged between the moving die 200 and the fixed die 100.

[0050] In this embodiment, an installation seat 300 is arranged on one side of the fixed die 100, and a core-pulling oil cylinder 400 is arranged on the installation seat 300. The moving die 200 is arranged on the fixed die 100, and the two form the mold cavity 5 through precise cooperation. The die-casting mold exhaust structure is as described before, including components such as an exhaust base 2, a cover plate 1, an air-introducing channel 3, and a buffer cavity 31. These components work together to ensure that the gas in the cavity 5 during the die-casting process can be effectively discharged. On one side of the fixed die 100, an installation seat 300 is specially arranged for installing the core-pulling oil cylinder 400. The core-pulling oil cylinder 400 is a common component in die-casting molds, used to perform a side core-pulling action during the die-casting process to form a casting with side holes or side bosses. When the die-casting machine starts to work, the molten metal is injected into the mold cavity 5. At the same time, the die-casting mold exhaust structure starts to play a role, quickly discharging the gas in the cavity 5 through the air-introducing channel 3 and the buffer cavity 31 to ensure the quality of the casting. When side core-pulling is required, the core-pulling oil cylinder 400 is started, and the power generated by it is used to push the side core-pulling mechanism to perform the core-pulling action, thereby forming the required side holes or side bosses. By adopting the die-casting mold exhaust structure, this mold can more effectively discharge the gas in the cavity 5, reduce the generation of defects such as pores and bubbles, and thus improve the quality and appearance of the casting.

[0051] The embodiments of the present invention have been described above. The above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of the terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technologies in the market, or to enable other ordinary skill in the art in this technical field to understand the disclosed embodiments.

Claims

1. A die-casting mold exhaust structure, arranged between a movable mold (200) and a fixed mold (100), characterized in that: include: An exhaust base (2) and a cover plate (1), wherein the exhaust base (2) is fixed on a fixed mold (100), and a plurality of exhaust holes (22) are provided on the exhaust base (2); the cover plate (1) is provided on the exhaust base (2), and an air cavity is formed between the cover plate (1) and the exhaust base (2); An air inlet channel (3) is provided on the fixed mold (100), and when the cover plate (1) is arranged on the exhaust base (2), a portion of the cover plate (1) covers the air inlet channel (3) and seals the air inlet channel (3); one end of the air inlet channel (3) is connected to the air cavity, and the other end is connected to the mold cavity (5) of the mold.

2. The die-casting mold exhaust structure according to claim 1, wherein: The air inlet channel (3) is arranged on one side of the exhaust base (2), and a plurality of buffer chambers (31) are arranged in the air inlet channel (3).

3. The die-casting mold exhaust structure according to claim 2, wherein: The mold is provided with two cavities (5), and the two cavities (5) are respectively located on two opposite sides of the exhaust base (2) of the mold; The air inlet channel (3) has two air inlet ends and one air outlet end, wherein the two air inlet ends are connected to the two mold cavities (5) respectively, and the air outlet end is connected to the exhaust base (2).

4. The die-casting mold exhaust structure according to any one of claims 1 to 3, characterized in that: A plurality of mounting holes (23) are provided on the exhaust base (2), and the exhaust base (2) is fixed to the fixed mold (100) by screws passing through the mounting holes (23).

5. The die-casting mold exhaust structure according to any one of claims 1 to 3, characterized in that: The exhaust base (2) is provided with a plurality of ridges (21), and the cover plate (1) is provided with grooves (11) opposite to the ridges (21). When the cover plate (1) is arranged on the exhaust base (2), a flow passage is formed between the ridges (21) and the grooves (11), and the flow passage is communicated with the exhaust hole (22).

6. The die-casting mold exhaust structure according to claim 5, characterized in that: The raised height of the convex strip (21) is 1-3 cm.

7. A die-casting mold, comprising a movable mold (200) and a fixed mold (100), wherein the movable mold (200) is arranged on the fixed mold (100), characterized in that: A die-casting mold exhaust structure according to any one of claims 1 to 6 is provided between the movable mold (200) and the fixed mold (100).

8. The die-casting mold according to claim 7, wherein: A mounting seat (300) is provided on one side of the fixed mold (100), and a core-pulling oil cylinder (400) is provided on the mounting seat (300).

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