Vacuum extraction structure for a die-casting die and die-casting die

Abstract

The utility model belongs to die casting die technical field provides a kind of vacuum extraction structure and die casting die for die casting die, vacuum extraction structure includes: main block, it is set in connecting groove, and main block is provided with accommodating cavity and the through-hole being communicated with accommodating cavity in one end;Valve body, it is set in through-hole;Valve stem, it is movably inserted in valve body, for control accommodating cavity and outside air between on-off;Connecting block, it is detachably connected on main block, and covers opening.Compared with prior art, the utility model is positioned by setting detachable connecting block to restrict valve body, realizes the modular design of vacuum extraction structure;When connecting block is installed, valve body is reliably fixed, and system sealing and function stability are guaranteed;After connecting block is removed, valve body can be easily taken out, and it is convenient to clean or replace.

Description

Technical Field

[0001] This utility model belongs to the field of die casting mold technology, specifically relating to a vacuum structure for die casting molds and a die casting mold. Background Technology

[0002] In the die casting process, to reduce defects such as porosity and shrinkage in the casting and improve the density and surface quality of the product, a vacuum treatment is usually performed on the cavity after mold closing and before molten metal injection. For this purpose, a vacuum device is often installed on the die casting mold to connect the cavity with an external vacuum system, thereby effectively removing air and gases from the mold cavity.

[0003] Currently, most existing vacuum devices for die-casting molds are directly embedded or fixedly installed inside the mold. For example, the vacuum valve body or evacuation channel is directly machined into the mold frame or template and connected to a vacuum pump via pipes. While this type of structure can achieve vacuuming to a certain extent, it has significant drawbacks in practical use. When the vacuum device becomes clogged due to the accumulation of metal flash, residue, or impurities, maintenance and cleaning are extremely inconvenient because its structure is deeply integrated inside the mold. Operators must first disassemble the entire die-casting mold from the die-casting equipment and transport it to the maintenance area. Only by disassembling the mold body can they access the key components of the vacuum device for cleaning or replacement.

[0004] This maintenance method is not only cumbersome and time-consuming, but also severely impacts production rhythm, leading to prolonged equipment downtime and a significant decrease in production efficiency. Furthermore, frequent mold disassembly and assembly can damage mold precision, increase maintenance costs, and pose certain safety risks. Therefore, existing vacuum devices are significantly inadequate in terms of maintainability and ease of replacement, failing to meet the demands of modern die-casting production for efficient and continuous operation.

[0005] To address the aforementioned issues, there is an urgent need for a vacuuming structure that is structurally sound, easy to disassemble and maintain, and capable of quickly disassembling, cleaning, or replacing the vacuuming components without dismantling the entire mold, thereby improving the maintainability and operational efficiency of the equipment. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide a vacuum structure for die casting molds and a die casting mold, in view of the current situation of the prior art.

[0007] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: A vacuuming structure for die-casting molds is proposed, wherein the die-casting mold includes a mold frame, and a connecting groove with an opening is provided on the side wall of the mold frame; the vacuuming structure includes: A main body block is disposed in the connecting groove, and the main body block is provided with a receiving cavity and a through hole communicating with the receiving cavity at one end; The valve body is disposed within the through hole; A valve stem, which is movably inserted into the valve body, is used to control the opening and closing of the receiving cavity with the outside air; A connecting block, detachably connected to the main body block, and covering the opening; wherein, When the connecting block is fixed to the main body block, one end of the valve body extends into the connecting block and abuts against the connecting block, so that the valve body is held in a preset position. When the connecting block is removed in a direction away from the main body block, the valve body loses the constraint from the connecting block and is in a free state, thereby being able to separate from the main body block.

[0008] In the aforementioned vacuuming structure for a die-casting mold, a threaded hole is provided on the main body block along an axial direction parallel to the valve stem, and a connecting hole coaxial with the threaded hole is provided on the connecting block. A bolt passes through the connecting hole and is threadedly connected to the threaded hole to detachably fix the connecting block to the main body block.

[0009] In the aforementioned vacuuming structure for die-casting molds, the main body block is provided with a stepped hole and a limiting part. The outer peripheral wall of the valve body is provided with a first main body part and a second main body part in sequence along the direction away from the main body block. The first main body part is inserted into the small end of the stepped hole and abuts against the limiting part, and the second main body part is inserted into the large end of the stepped hole.

[0010] In the aforementioned vacuuming structure for a die-casting mold, the connecting block is provided with a receiving groove that matches the shape of the second main body. When the connecting block is fixed on the main body block, the second main body is inserted into the receiving groove.

[0011] The aforementioned vacuuming structure for a die-casting mold further includes a connector, which is detachably connected to one end of the connecting block away from the main body block. The valve stem is provided with a countersunk head, and the connector is provided with a T-slot. One end of the T-slot is in communication with the outside air, and the countersunk head is engaged in the T-slot.

[0012] In the aforementioned vacuuming structure for a die-casting mold, a groove is provided at one end of the connecting block away from the main block, and the two sides of the connecting member slide in cooperation with the sidewall of the groove, so as to guide the countersunk head to separate from the T-groove when the connecting member slides away from the connecting block.

[0013] In the aforementioned vacuuming structure for a die-casting mold, a limiting block is provided at one end of the connecting block away from the main body block. The limiting block covers the connecting hole and abuts against the connecting member, thereby providing a limiting position for the connecting member.

[0014] In the aforementioned vacuuming structure for a die-casting mold, the connecting member includes: A base that is detachably connected to the connecting block; A mounting base is disposed at one end of the base away from the connecting block, and a mounting cavity is formed between the base and the mounting base; A first connecting shaft is disposed within the mounting cavity, and the T-slot is disposed on the first connecting shaft; A connecting seat is disposed at one end of the mounting seat opposite to the base; A second connecting shaft is disposed at one end of the connecting seat away from the mounting seat, and one end of the second connecting shaft passes through the connecting seat and the mounting seat in sequence and is connected to the first connecting shaft.

[0015] In the aforementioned vacuuming structure for die-casting molds, a limit switch is provided on the connecting seat, and a trigger block is provided on the first connecting shaft. The trigger block contacts the limit switch to detect the position of the first connecting shaft.

[0016] This utility model solves the above-mentioned technical problems and also proposes a die-casting mold, including the above-mentioned vacuuming structure for die-casting molds.

[0017] Compared with the prior art, the present invention has the following beneficial effects.

[0018] (1) By setting a detachable connecting block to constrain the position of the valve body, a modular design of the vacuuming structure is realized; when the connecting block is installed, the valve body is reliably fixed, ensuring the system's sealing and functional stability; after the connecting block is removed, the valve body can be easily taken out for cleaning or replacement. This structure significantly improves the ease of maintenance, avoiding the cumbersome process of having to completely disassemble the mold to repair the vacuuming device in traditional technology, effectively shortening downtime, improving production efficiency and equipment maintainability.

[0019] (2) By setting threaded holes on the main block and configuring corresponding connecting holes on the connecting block, and then fixing with bolts, this design not only achieves a firm and reliable connection between the connecting block and the main block, but also ensures the simplicity of the structure and the convenience of assembly.

[0020] (3) The design of the stepped hole and the limiting part can accurately position and limit the valve body axially, preventing the valve body from shifting or moving during operation. The first main body abuts against the limiting part, and the second main body is inserted into the large end of the stepped hole to form a two-stage positioning structure, which not only enhances the stability of the valve body installation, but also improves the sealing performance, effectively prevents gas leakage, and ensures the efficiency and reliability of the vacuuming process. Attached Figure Description

[0021] Figure 1 This is a perspective view of a vacuuming structure for die-casting molds, as described in this utility model, installed on the die-casting mold.

[0022] Figure 2 It is a 3D view of the structure of the die-casting mold.

[0023] Figure 3 This is a perspective view of a vacuuming structure for die-casting molds according to this utility model.

[0024] Figure 4 yes Figure 3 Floor plan.

[0025] Figure 5 yes Figure 4 Sectional view along the AA direction.

[0026] Figure 6 This is an exploded view of a vacuum structure for die-casting molds according to this utility model.

[0027] In the diagram, 100 is the mold frame; 110 is the connecting groove; 200 is the vacuuming structure; 210 is the main body block; 211 is the threaded hole; 212 is the stepped hole; 220 is the valve body; 221 is the first main body part; 222 is the second main body part; 230 is the valve stem; 231 is the countersunk head; 240 is the connecting block; 241 is the connecting hole; 242 is the receiving groove; 243 is the sliding groove; 244 is the limiting block; 250 is the connecting piece; 251 is the base; 252 is the mounting base; 253 is the first connecting shaft; 254 is the connecting base; 255 is the second connecting shaft; 256 is the limit switch; and 257 is the trigger block. Detailed Implementation

[0028] 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.

[0029] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment 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 indicator will also change accordingly.

[0030] like Figures 1 to 6 As shown, this utility model discloses a vacuuming structure for a die-casting mold. The die-casting mold includes a mold frame 100, and a connecting groove 110 with an opening is provided on the side wall of the mold frame 100. The vacuuming structure 200 includes: a main block 210, a valve body 220, a valve stem 230, and a connecting block 240.

[0031] Specifically, the main body block 210 is disposed within the connecting groove 110, and its interior has a receiving cavity and a through hole communicating with the receiving cavity at one end. This receiving cavity is connected to the cavity of the die-casting mold via a groove-shaped channel, and is used to receive the gas discharged from the cavity, as well as any metal flash or fragments entrained within it. The receiving cavity is equipped with a separation structure to intercept metal impurities in the gas while allowing the gas to escape smoothly, thereby achieving effective venting of the mold cavity.

[0032] The valve body 220 is installed in the through hole of the main body block 210, and the valve stem 230 is movably inserted into the valve body 220 to control the opening and closing of the cavity and the outside world, thereby realizing the opening and closing function of the vacuuming process.

[0033] The connecting block 240 is detachably connected to the main body block 210 and covers the opening of the connecting groove 110.

[0034] During operation, when the connecting block 240 is fixed on the main body block 210, one end of the valve body 220 extends into the interior of the connecting block 240 and abuts against the connecting block 240, thereby stably positioning the valve body 220 in the preset position and ensuring the normal operation of the vacuum structure 200.

[0035] When the vacuum structure 200 becomes blocked or requires maintenance due to other abnormalities, first remove the connecting block 240 away from the main body block 210. At this time, the valve body 220 loses its axial constraint from the connecting block 240 and is in a free state, and can be removed from the main body block 210 together with the valve stem 230. The operator can clean any foreign objects between the valve stem 230 and the valve body 220. After maintenance is completed, reinstall the valve body 220 and valve stem 230 back into the main body block 210, and reinstall the connecting block 240 to restore the normal operation of the vacuum structure 200.

[0036] This design achieves a modular design for the vacuuming structure 200 by using a detachable connecting block 240 to constrain the position of the valve body 220. When the connecting block 240 is installed, the valve body 220 is reliably fixed, ensuring system sealing and functional stability. After removing the connecting block 240, the valve body 220 can be easily removed for cleaning or replacement. This structure significantly improves maintenance convenience, avoiding the cumbersome process of traditional technologies that require complete mold disassembly for vacuuming device maintenance, effectively shortening downtime, and improving production efficiency and equipment maintainability.

[0037] Furthermore, the detachable connection between the connecting block 240 and the main body block 210 is achieved through a threaded connection. Specifically, a threaded hole 211 is provided on the main body block 210 along a position parallel to the axial direction of the valve stem 230, while a connecting hole 241 coaxial with the threaded hole 211 is provided on the connecting block 240. During installation, a bolt passes through the connecting hole 241 and is threadedly connected to the threaded hole 211, thereby securely and detachably fixing the connecting block 240 to the main body block 210.

[0038] By providing threaded holes 211 on the main body block 210 and corresponding connecting holes 241 on the connecting block 240, and then fixing it with bolts, this design not only achieves a firm and reliable connection between the connecting block 240 and the main body block 210, but also ensures the simplicity of the structure and the convenience of assembly. This connection method effectively prevents the connecting block 240 from loosening or falling off during vacuuming, enhancing the stability and sealing performance of the overall structure and ensuring a stable vacuum environment can be established.

[0039] The main body block 210 is provided with a stepped hole 212 and a limiting part. The outer peripheral wall of the valve body 220 is provided with a first main body part 221 and a second main body part 222 in sequence along the direction away from the main body block 210. The first main body part 221 is inserted into the small end of the stepped hole 212 and abuts against the limiting part. The second main body part 222 is inserted into the large end of the stepped hole 212.

[0040] The design of the stepped hole 212 and the limiting part allows for precise axial positioning and limiting support of the valve body 220, preventing displacement or movement of the valve body 220 during operation. The first main body 221 abuts against the limiting part, and the second main body 222 is inserted into the large end of the stepped hole 212, forming a two-stage positioning structure. This not only enhances the stability of the valve body 220 installation but also improves the sealing performance, effectively preventing gas leakage and ensuring the efficiency and reliability of the vacuuming process.

[0041] The connecting block 240 is provided with a receiving groove 242 that is adapted to the shape of the second main body 222. When the connecting block 240 is fixed on the main body block 210, the second main body 222 is inserted into the receiving groove 242.

[0042] The matching design of the receiving groove 242 with the shape of the second main body 222 of the valve body 220 allows the connecting block 240 to apply radial constraint to the valve body 220 during installation, further enhancing the positioning accuracy and structural stability of the valve body 220. Simultaneously, this mating structure helps guide the connecting block 240 to be installed accurately, improving assembly efficiency, and provides a clear separation path during disassembly, facilitating quick release of constraints and smooth removal of the valve body 220.

[0043] This solution also includes a connector 250, which is detachably connected to the end of the connector 240 away from the main body block 210; a countersunk head 231 is provided on the valve stem 230, and a T-slot is provided on the connector 250, with one end of the T-slot communicating with the outside air, and the countersunk head 231 being snapped into the T-slot.

[0044] By providing a countersunk head 231 on the valve stem 230 and engaging it in the T-slot of the connector 250, quick connection and disengagement between the valve stem 230 and an external drive mechanism (such as a cylinder or manual operating device) are achieved. The T-slot structure allows the countersunk head 231 to slide within a certain stroke, which not only transmits driving force to control the opening and closing of the valve stem 230, but also allows for easy separation during disassembly without the need for additional fastener removal, greatly simplifying the maintenance process and improving operational convenience.

[0045] The connecting block 240 has a groove 243 at one end away from the main block 210. The two sides of the connecting member 250 slide and engage with the side wall of the groove 243 to guide the countersunk head 231 to separate from the T-slot when the connecting member 250 slides away from the connecting block 240.

[0046] The sliding fit structure between the slide groove 243 and the side wall of the connector 250 provides a guiding function for the disassembly of the connector 250. When the connector 250 slides out along the slide groove 243, it smoothly guides the countersunk head 231 out of the T-slot, avoiding damage to parts caused by forced disassembly. This design improves the safety and smoothness of the disassembly and assembly process, extends the service life of components, and also facilitates quick replacement and maintenance.

[0047] A limiting block 244 is provided at one end of the connecting block 240 away from the main body block 210. The limiting block 244 covers the connecting hole 241 and abuts against the connector 250 to provide a limit for the connector 250.

[0048] The limiting block 244 not only covers the connecting hole 241 where the bolt is located, serving to prevent dust and foreign objects from entering, but also limits the connection 250 to prevent it from accidentally slipping off during operation. This structure enhances the reliability of the connection 250 installation, while protecting the fastening bolt from external impacts or high-temperature environments, thus improving the safety and durability of the overall structure.

[0049] The connector 250 includes: a base 251 detachably connected to the connecting block 240; a mounting base 252 disposed at one end of the base 251 away from the connecting block 240, forming a mounting cavity between the base 251 and the mounting base 252; a first connecting shaft 253 disposed within the mounting cavity, with a T-slot disposed on the first connecting shaft 253; a connecting seat 254 disposed at one end of the mounting base 252 away from the base 251; and a second connecting shaft 255 disposed at one end of the connecting seat 254 away from the mounting seat 252, with one end of the second connecting shaft 255 passing sequentially through the connecting seat 254 and the mounting base 252 and connected to the first connecting shaft 253.

[0050] The multi-component integrated connector 250 features a rational and well-defined structure, achieving both reliable transmission connection with the valve stem 230 and excellent modularity. The T-slot on the first connecting shaft 253 connects to the valve stem 230, while the second connecting shaft 255 penetrates the multi-layered structure and connects to the first connecting shaft 253, forming a stable transmission chain. This facilitates the use of external actuators to drive the valve stem 230. The overall structure is compact and provides stable force transmission, making it suitable for automated control systems and enhancing the intelligence level of the equipment.

[0051] A limit switch 256 is provided on the connector 254, and a trigger block 257 is provided on the first connecting shaft 253. The trigger block 257 is in contact with the limit switch 256 to detect the position status of the first connecting shaft 253.

[0052] By setting the limit switch 256 and the trigger block 257 to make contact, the position of the first connecting shaft 253 (i.e., valve stem 230) can be detected in real time to determine whether the valve is in the open or closed position. This feedback mechanism provides a reliable signal guarantee for the die-casting process, helps to realize the automated control and interlock protection of the vacuuming action, prevents misoperation, improves production safety and process controllability, and meets the needs of intelligent manufacturing.

[0053] This solution also proposes a die-casting mold, including the aforementioned vacuum structure 200.

[0054] This solution provides a vacuum structure 200 for die-casting molds and the die-casting molds used therein, aiming to solve the technical problems of high integration, difficult maintenance, and long downtime and low efficiency caused by the need to disassemble the mold for cleaning after blockage in existing vacuum devices. By innovatively designing modular and detachable vacuum components, this solution achieves rapid disassembly and maintenance of key components without disassembling the entire mold.

[0055] This structure, through the coordinated operation of the main block 210, valve body 220, valve stem 230, connecting block 240, and connector 250, constructs a stable, reliable, and easy-to-operate vacuum control unit. The detachable design of the connecting block 240 not only provides stable positioning for the valve body 220 during operation but also releases constraints during disassembly, allowing the valve body 220 to be freely removed. The snap-fit ​​transmission structure between the connector 250 and the valve stem 230 further enables rapid connection and disconnection. Combined with guiding and limiting mechanisms such as the slide groove 243 and the limit block 244, the safety and convenience of assembly and disassembly are significantly improved. Furthermore, the feedback system integrating the limit switch 256 and the trigger block 257 can monitor the position of the valve stem 230 in real time, providing reliable assurance for the automated control and interlocking protection of the die-casting process.

[0056] It should be noted that in this utility model, the use of terms such as "first," "second," and "a" is 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. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly defined. 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 elements or the interaction between two elements, unless otherwise explicitly defined. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0057] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When 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 this utility model.

[0058] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A vacuum extraction structure for a die casting mold including a mold frame, a connecting groove with an opening being provided on a side wall of the mold frame, characterized in that, The vacuuming structure includes: A main body block is disposed in the connecting groove, and the main body block is provided with a receiving cavity and a through hole communicating with the receiving cavity at one end; The valve body is disposed within the through hole; A valve stem, which is movably inserted into the valve body, is used to control the opening and closing of the receiving cavity with the outside air; A connecting block, detachably connected to the main body block, and covering the opening; wherein, When the connecting block is fixed to the main body block, one end of the valve body extends into the connecting block and abuts against the connecting block, so that the valve body is held in a preset position. When the connecting block is removed in a direction away from the main body block, the valve body loses the constraint from the connecting block and is in a free state, thereby being able to separate from the main body block.

2. A vacuum extraction structure for a die-casting mold according to claim 1, wherein The main body block has a threaded hole along the axial direction parallel to the valve stem, and the connecting block has a connecting hole coaxial with the threaded hole. A bolt passes through the connecting hole and is threadedly connected to the threaded hole to detachably fix the connecting block to the main body block.

3. A vacuum extraction structure for a die-casting mold according to claim 1, wherein The main body is provided with a stepped hole and a limiting part. The outer peripheral wall of the valve body is provided with a first main body and a second main body in sequence along the direction away from the main body. The first main body is inserted into the small end of the stepped hole and abuts against the limiting part, and the second main body is inserted into the large end of the stepped hole.

4. The vacuuming structure for die-casting molds as described in claim 3, characterized in that, The connecting block is provided with a receiving groove that matches the shape of the second main body. When the connecting block is fixed on the main body, the second main body is inserted into the receiving groove.

5. A vacuum extraction structure for a die-casting mold according to claim 2, wherein It also includes a connector that is detachably connected to one end of the connecting block away from the main body block; The valve stem is provided with a countersunk head, and the connector is provided with a T-slot. One end of the T-slot is in communication with the outside air, and the countersunk head is engaged in the T-slot.

6. A vacuum extraction structure for a die-casting mold according to claim 5, wherein The connecting block has a groove at one end away from the main block, and the two sides of the connector slide against the side wall of the groove to guide the countersunk head to separate from the T-groove when the connector slides away from the connecting block.

7. The vacuuming structure for a die-casting mold as described in claim 5, characterized in that, A limiting block is provided at one end of the connecting block away from the main body block. The limiting block covers the connecting hole and abuts against the connecting member to provide a limiting position for the connecting member.

8. A vacuum extraction structure for a die-casting mold according to claim 5, wherein The connector includes: A base that is detachably connected to the connecting block; A mounting base is disposed at one end of the base away from the connecting block, and a mounting cavity is formed between the base and the mounting base; A first connecting shaft is disposed within the mounting cavity, and the T-slot is disposed on the first connecting shaft; A connecting seat is disposed at one end of the mounting seat opposite to the base; A second connecting shaft is disposed at one end of the connecting seat away from the mounting seat, and one end of the second connecting shaft passes through the connecting seat and the mounting seat in sequence and is connected to the first connecting shaft.

9. A vacuum extraction structure for a die-casting mold according to claim 8, wherein A limit switch is provided on the connector, and a trigger block is provided on the first connecting shaft. The trigger block is in contact with the limit switch to detect the position of the first connecting shaft.

10. A die-casting mold characterized by comprising: A vacuum extraction structure for a die-casting mold comprising any one of claims 1 to 9.

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