Vacuum exhaust device for die-casting die

Abstract

The utility model relates to the technical field of die-casting processes, and provides a vacuum exhaust device for a die-casting die. The second module abuts against the first module to form an exhaust channel for fluid circulation; the exhaust channel is provided with a feeding section, a bent section, a storage section and a protruding section, a first included angle is formed between the feeding section and the bent section, a second included angle is formed between the bent section and the storage section, and a third included angle is formed between the storage section and the protruding section. Due to the design of the structural sections and the included angles, the speed of the metal solution flowing into the exhaust channel is reduced by increasing the complexity of the flow channel, so that more time is provided for gas to escape, finally, the metal solution is intercepted in the exhaust channel, and the gas is effectively pumped out; compared with a traditional sawtooth-shaped exhaust channel, the design is more economical and practical in manufacturing cost, the machining difficulty in actual production is greatly reduced, and automatic production and maintenance are easier to achieve.

Description

Technical Field

[0001] The utility model relates to the technical field of die-casting technology, in particular to a vacuum exhaust device for a die-casting mold. Background Art

[0002] The exhaust system in die-casting molds is primarily used to remove gases generated during the die-casting process to ensure the quality of the final product. During the die-casting process, when molten metal is injected into the mold cavity under high pressure, the air and other gases inside the mold must be quickly exhausted. Otherwise, these gases will be trapped inside the product, causing bubbles, looseness, or other defects, which will affect the mechanical properties and appearance quality of the product.

[0003] In existing exhaust devices, a serrated exhaust channel is a common design. This complex geometry improves exhaust efficiency, thereby enhancing the quality of the die-cast part. However, when machining these exhaust devices, the serrated design increases production costs because more parts need to be machined. Furthermore, when the exhaust device is small, creating the serrated shape requires a smaller tool, making machining the serrated channel more complex and increasing the risk of tool breakage due to the smaller tool size. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a vacuum exhaust device for a die-casting mold in view of the current status of the existing technology.

[0005] The technical solution adopted by the present invention to solve the above technical problems is: to propose a vacuum exhaust device for a die-casting mold, comprising:

[0006] Module 1;

[0007] A second module abuts against the first module to form an exhaust channel for fluid circulation, one end of the exhaust channel is connected to the product cavity, and the other end is connected to the vacuum valve;

[0008] The exhaust channel has a feeding section, a bending section, a storage section and a raised section. The feeding section, the bending section, the storage section and the raised section extend sequentially in the exhaust channel. There is a first angle between the feeding section and the bending section, a second angle between the bending section and the storage section, and a third angle between the storage section and the raised section. The feeding section, the bending section, the storage section and the raised section are used to slow down the speed at which the metal solution flows into the exhaust channel.

[0009] In the above-mentioned vacuum exhaust device for a die-casting mold, the first angle, the second angle, and the third angle are all arc transitions.

[0010] In the above-mentioned vacuum exhaust device for a die-casting mold, the exhaust channel is a bilaterally symmetrical structure.

[0011] In the above-mentioned vacuum exhaust device for a die-casting mold, the material storage section has a first deep concave and a first groove, and the first deep concave and the first groove are used to store the fluid flowing into the material storage section.

[0012] In the above-mentioned vacuum exhaust device for the die-casting mold, the raised section is provided with a plurality of raised blocks, and a second groove is provided between the raised blocks. The raised blocks are used to slow down the flow speed of the fluid in the raised section, and the second groove is used to store the fluid flowing into the raised section.

[0013] In the vacuum exhaust device of the above-mentioned casting mold, a second deep recess is further provided at one end of the convex section away from the material storage section, and the second deep recess is used to store the fluid flowing out of the convex section.

[0014] In the above-mentioned vacuum exhaust device for a die-casting mold, a cooling pipe is further provided in the first module, and a coolant flows into the cooling pipe to cool the exhaust channel.

[0015] In the above-mentioned vacuum exhaust device for a die-casting mold, the second module is further provided with a plurality of through-holes, which are communicated with the exhaust channel and are used for inserting ejector pins.

[0016] Compared with the prior art, the advantage of the present invention is that by arranging a feed section, a bending section, a storage section and a raised section in the exhaust channel, the speed at which the metal solution flows into the exhaust channel is slowed down. When the die-casting mold is performing the injection operation, as the metal solution under high pressure is injected into the cavity, the air and part of the metal solution in the product cavity will be pushed into the exhaust channel through the feed section. The gas and the metal solution start from the feed end and flow through the first angle, the bending section, the second angle, the storage section, the third angle and the raised section in sequence. The design purpose of these structural sections and angles is not only to guide the direction of material flow, but more importantly, to slow down the speed at which the metal solution flows into the exhaust channel by increasing the complexity of the flow channel, thereby giving the gas more time to escape. Ultimately, the metal solution will be trapped in the exhaust channel, and the gas will be effectively extracted. Compared with the traditional serrated exhaust channel, this design is not only more economical in manufacturing cost, but also greatly reduces the processing difficulty in actual production, and is easier to achieve automated production and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional diagram of this scheme;

[0018] Figure 2 This is the floor plan of this scheme;

[0019] Figure 3 yes Figure 2 Cross-sectional view of AA;

[0020] Figure 4 yes Figure 1 A three-dimensional diagram of some structures in .

[0021] In the figure, 1, first module; 2, second module; 3, exhaust channel; 4, feed section; 5, bending section; 6, storage section; 7, raised section; 8, first deep concave; 9, first groove; 10, raised block; 11, second groove; 12, second deep concave; 13, cooling pipe; 14, perforation. DETAILED DESCRIPTION

[0022] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0023] like Figures 1 to 4 As shown, the utility model is a vacuum exhaust device for a die-casting mold, comprising: a first module 1; a second module 2, which abuts against the first module 1 to form an exhaust channel 3 for fluid circulation, one end of the exhaust channel 3 is connected to the product cavity, and the other end is connected to the vacuum valve; the exhaust channel 3 has a feeding section 4, a bending section 5, a storage section 6, and a protruding section 7, the feeding section 4, the bending section 5, the storage section 6 and the protruding section 7 extend in sequence in the exhaust channel 3, there is a first angle between the feeding section 4 and the bending section 5, there is a second angle between the bending section 5 and the storage section 6, there is a third angle between the storage section 6 and the protruding section 7, the feeding section 4, the bending section 5, the storage section 6 and the protruding section 7 are used to slow down the speed at which the metal solution flows into the exhaust channel 3.

[0024] The first module 1 and the second module 2 are both installed on the die-casting mold. When the die-casting mold is closed, the first module 1 and the second module 2 are in close contact and form an exhaust channel 3 together under the drive of the die-casting mold. In this process, the vacuum valve is immediately started to extract the gas in the exhaust channel 3, so that a negative pressure state is formed inside the exhaust channel 3, that is, a certain degree of vacuum is generated. The purpose of this is to more effectively remove the gas in the product cavity in the subsequent injection step and reduce the porosity defects in the product; when the die-casting mold is performing the injection operation, as the high-pressure metal solution is injected into the product cavity, the gas in the product cavity and part of the metal solution will be pushed into the feed in the exhaust channel 3. Segment 4, then, the gas and metal solution start from the feed segment 4, and flow through the first angle, the bending segment 5, the second angle, the storage segment 6, the third angle and the raised segment 7 in sequence. The design purpose of these structural segments and angles is not only to guide the direction of material flow, but more importantly, to slow down the speed of the metal solution flowing into the exhaust channel 3 by increasing the complexity of the flow channel, thereby giving the gas more time to escape. Finally, the metal solution will be trapped in the exhaust channel 3, and the gas will be effectively extracted. Compared with the zigzag-shaped exhaust channel, this design is not only more economical in manufacturing cost, but also greatly reduces the processing difficulty in actual production, and is easier to achieve automated production and maintenance.

[0025] Furthermore, the first angle, the second angle and the third angle are arc transitions, which are used to achieve smooth transition of the fluid between each section. The arc transition design can also reduce the impact of the fluid on the inner wall of the exhaust channel 3, reduce wear, and extend the service life of the exhaust channel 3.

[0026] Furthermore, the exhaust channel 3 has a bilaterally symmetrical structure. This design helps to ensure uniform exhaust effects on both sides of the exhaust channel 3, reducing the problem of local pressure differences or poor exhaust caused by an asymmetric design.

[0027] Specifically, the storage section 6 has a first deep recess 8 and a first groove 9. The first deep recess 8 is a relatively deep design, and its depth is sufficient to accommodate a certain amount of metal solution. During the injection process, as the metal solution and gas are pushed into the exhaust channel 3, the first deep recess 8 can temporarily store a portion of the metal solution. The first groove 9 is shallower than the first deep recess 8. The design of the first deep recess 8 and the first groove 9 is combined to form an effective fluid management mechanism. As a result of their joint action, the flow velocity of the metal solution is significantly reduced after entering the storage section 6, which gives the gas more time to escape. At the same time, these structures also play the role of temporarily storing fluid to prevent the metal solution from entering the exhaust channel 3 too quickly. Compared with the complex zigzag design, this design is simpler, easier to process and maintain, and reduces production costs.

[0028] Specifically, the raised section 7 is provided with several raised blocks 10, and second grooves 11 are provided between the raised blocks 10. The presence of the raised blocks 10 can increase the resistance to fluid flow and slow down the flow rate of the metal solution by means of physical obstacles. When the metal solution flows through the raised blocks 10, it needs to bypass these obstacles, thereby reducing the flow rate and giving the gas more time to escape. The second grooves 11 can temporarily store part of the fluid, especially when the flow rate of the metal solution is high. These grooves can serve as temporary storage space to prevent the metal solution from directly crossing the raised blocks 10, thereby further slowing down its flow rate. Compared with the complex zigzag design, the design of the raised blocks 10 and the second grooves 11 is simpler, easier to process and maintain, and reduces production costs.

[0029] Specifically, a second deep recess 12 is further provided at one end of the raised section 7 away from the material storage section 6. The second deep recess 12 serves as the final storage space and can further store the metal solution to ensure that the gas has sufficient time to escape.

[0030] In order to cool the exhaust channel 3, a cooling pipe 13 is also provided in the first module 1, and the coolant flows into the cooling pipe 13 to cool the exhaust channel 3; when the die-casting process starts, the high-temperature metal solution is injected into the mold cavity, and the resulting gas and a small amount of metal solution will flow into the exhaust channel 3. In order to prevent the exhaust channel 3 from thermal deformation or thermal fatigue caused by the high temperature, and to accelerate the solidification of the metal solution in the exhaust channel 3 and prevent the metal solution from continuing to move forward, the coolant flows into the cooling pipe 13 and flows along the cooling pipe 13. During this process, the coolant absorbs the heat around the exhaust channel 3, thereby reducing the temperature of the exhaust channel 3.

[0031] In order to eject the solidified metal in the exhaust channel 3, the second module 2 is further provided with a plurality of through-holes 14, which are connected to the exhaust channel 3. The ejector pins on the die-casting mold are movably inserted into the through-holes 14. When the die-casting mold is opened, the first module 1 and the second module 2 are separated from each other under the drive of the die-casting mold, and the ejection mechanism on the die-casting mold drives the ejector pins to be inserted into the exhaust channel 3 through the through-holes 14 to push the solidified metal away from the exhaust channel 3.

[0032] 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 position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0033] In addition, terms such as "first," "second," and "an" in this utility model are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0034] In this utility model, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0035] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0036] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described, or replace them with similar methods, without departing from the scope defined by the spirit of the present invention.

Claims

1. A vacuum exhaust device for a die casting mold, characterized in that: include: Module 1; A second module abuts against the first module to form an exhaust channel for fluid circulation, one end of the exhaust channel is connected to the product cavity, and the other end is connected to the vacuum valve; The exhaust channel has a feeding section, a bending section, a storage section and a raised section. The feeding section, the bending section, the storage section and the raised section extend sequentially in the exhaust channel. There is a first angle between the feeding section and the bending section, a second angle between the bending section and the storage section, and a third angle between the storage section and the raised section. The feeding section, the bending section, the storage section and the raised section are used to slow down the speed at which the metal solution flows into the exhaust channel.

2. A vacuum exhaust device for a die-casting mold according to claim 1, characterized in that: The first angle, the second angle, and the third angle are all arc transitions.

3. A vacuum exhaust device for a die-casting mold according to claim 1, characterized in that: The exhaust channel has a bilaterally symmetrical structure.

4. A vacuum exhaust device for a die-casting mold according to claim 1, characterized in that: The material storage section has a first deep concave and a first groove, and the first deep concave and the first groove are used to store the fluid flowing into the material storage section.

5. A vacuum exhaust device for a die-casting mold according to claim 1, characterized in that: The convex section is provided with a plurality of convex blocks, and second grooves are provided between the convex blocks. The convex blocks are used to slow down the flow speed of the fluid in the convex section, and the second grooves are used to store the fluid flowing into the convex section.

6. A vacuum exhaust device for a die-casting mold according to claim 1, characterized in that: A second deep recess is further provided at one end of the convex section away from the material storage section, and the second deep recess is used to store the fluid flowing out of the convex section.

7. A vacuum exhaust device for a die-casting mold according to claim 1, characterized in that: A cooling pipe is further provided in the first module, and coolant flows into the cooling pipe to cool the exhaust channel.

8. A vacuum exhaust device for a die-casting mold according to claim 1, characterized in that: The second module is further provided with a plurality of through-holes, which are communicated with the exhaust passage and are used for inserting ejector pins.

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