Aluminum die-casting die insert fixing device and aluminum die-casting die

Abstract

The utility model discloses an aluminum die-casting die insert fixing device which is used for fixing an opening insert and comprises a driving oil cylinder, a plurality of mold cores, a mold core fixing piece and an insert. An axial through hole is formed in the insert, the mold core is fixed on the mold core fixing part, and the driving oil cylinder is connected with and drives the mold core fixing part, so that the mold core axially moves in the axial through hole; a profiling part is arranged at the front end of the insert, a plurality of radial air channels are formed in the front section of the insert, and axial through holes penetrate through the radial air channels; the inner end of the axial air channel is communicated with the central intersection of the radial air channels, and the outer end of the axial air channel extends to the tail end of the insert and is used for being connected with vacuum equipment; the mold core is provided with a first position and a second position; at the first position, the front end surface of the mold core is flush with the outer end surface of the profiling part; and at the second position, the mold core moves backwards to enable the axial through hole and the radial air channel to form a communicating channel, and the insert is adsorbed and fixed through a negative pressure channel formed by the axial air channel, the radial air channel and the axial through hole.

Description

Technical Field

[0001] This utility model relates to the technical field of aluminum die casting, and in particular to an aluminum die casting mold insert fixing device and an aluminum die casting mold. Background Technology

[0002] Aluminum die casting, a highly specialized metal casting process, focuses on applying high pressure to molten aluminum in a mold cavity to rapidly solidify and shape the metal. This technology not only significantly improves production efficiency but also endows castings with high precision, high strength, and excellent surface quality. Among many metal materials, aluminum alloys, with their unique advantages such as light weight, high strength, corrosion resistance, and good thermal conductivity, have become the preferred material for manufacturing automotive parts. Therefore, aluminum die casting technology has naturally become the most common and effective technical means in automotive parts manufacturing.

[0003] Insert casting is a common aluminum die-casting technique used in automotive parts. Also known as insert molding, insert die casting involves pre-embedding a metal or non-metal part into a die-casting mold, then casting it together with the die-cast part. This process fully utilizes the performance advantages of various materials, such as strength, hardness, corrosion resistance, wear resistance, magnetic permeability, and electrical conductivity, to meet the requirements of different usage conditions. Simultaneously, it can compensate for the defects caused by insufficient structural manufacturability in die-cast parts and solve the die-casting challenges of parts with special technical requirements.

[0004] However, the inability to completely fix the inserts during the production of die-cast parts with inserts has always been a technical challenge in the industry. Although inserts are usually equipped with positioning holes in actual production to prevent them from moving left and right within the mold cavity, structural limitations mean that inserts can still easily move back and forth within the mold cavity. This movement ultimately affects the dimensional accuracy of the casting and the product's functionality, becoming a technical problem that urgently needs to be solved. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide an aluminum die-casting mold insert fixing device and method that is easy to operate, has a good fixing effect, and has high process stability.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a novel insert fixing device and method, including a mold insert (4) in contact with the insert; three cores (2) inside the insert (4); the cores are connected by core fixing parts (3), the core fixing parts (3) are connected to the cylinder head, and the central exhaust system of the insert (4) includes a cross-sectional exhaust channel 1, a cross-sectional exhaust channel 2, a cross-sectional exhaust channel 3, a vertical exhaust channel, and a horizontal exhaust channel. One end of the radial air channel 1, radial air channel 2, and radial air channel 3 is connected to the channel inside the core (2), and the other end is gathered into the radial air channel (43) in the middle position. One end of the radial air channel (42) is connected to the gathered radial exhaust channel (42), and the other end is connected to the axial air channel (44). One end of the axial air channel (44) is connected to the radial air channel (43), and the other end is connected to the vacuum interface outside the mold.

[0007] The technical solution adopted by this utility model to solve the above-mentioned technical problems is: an aluminum die-casting mold insert fixing device for fixing open inserts, characterized in that it includes: a driving cylinder (1), multiple cores (2), core fixing parts (3) and inserts (4);

[0008] The insert (4) has an axial through hole (41), the core (2) is fixed to the core fixing member (3), and the driving cylinder (1) is connected to and drives the core fixing member (3) so that the core (2) moves axially in the axial through hole (41).

[0009] The insert (4) has a contour part (42) at its front end. The insert (4) has multiple radial air passages (43) at its front end near the contour part (42), the number of which corresponds to the core and radiates outward from the center. The axial through hole (41) passes through the radial air passages (43).

[0010] The insert (4) has an axial air passage (44) in the middle. The inner end of the axial air passage (44) is connected to the center of each radial air passage (43), and the outer end extends to the end of the insert for connecting to a vacuum device.

[0011] The core (2) has a first position and a second position: in the first position, the front end face of the core is flush with the outer end face of the molding part (42); in the second position, the core (2) moves backward so that the axial through hole (41) and the radial air passage (43) form a communication channel, and the insert is adsorbed and fixed through the negative pressure channel formed by the axial air passage (44), the radial air passage (43) and the axial through hole (41).

[0012] The preferred technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: the molding part (42) is provided with a stepped concave-convex structure, and the insert matches the stepped concave-convex structure.

[0013] The preferred technical solution adopted by the utility model to solve the above-mentioned technical problems is as follows: the radial air passage (43) extends through the outer peripheral wall of the insert (4), and the outer end of the radial air passage is provided with a bolt plug (b).

[0014] The preferred technical solution adopted by the utility model to solve the above technical problems is as follows: the main body of the insert (4) is cylindrical, the radial air passage (43) has at least 3 rings, and is evenly distributed along the insert (4).

[0015] The preferred technical solution adopted by the utility model to solve the above-mentioned technical problems is as follows: the core fixing part (3) includes a disc part (31) and a connecting shaft (32), and the connecting shaft is connected to the driving cylinder (1) by fasteners.

[0016] The technical solution adopted by this utility model to solve the above-mentioned technical problems is: an aluminum die-casting mold insert fixing device for fixing open inserts, characterized in that it includes: a driving cylinder (1), multiple cores (2) and inserts (4);

[0017] The insert (4) is provided with an axial through hole (41), and the driving cylinder (1) drives the core (2) to move axially within the axial through hole (41);

[0018] The front end of the insert (4) is provided with a contour part (42) that matches the insert. The insert is provided with a plurality of radial air passages (43) that radiate outward from the center in a number corresponding to the core. The axial through hole (41) passes through the radial air passages (43).

[0019] The insert (4) has an axial air passage (44) in the middle. The inner end of the axial air passage (44) is connected to the center of each radial air passage (43), and the outer end extends to the end of the insert and has a vacuum interface.

[0020] The core (2) has a first position and a second position: in the first position, the front end face of the core is flush with the outer end face of the molding part (42); in the second position, the core (2) moves backward so that the axial through hole (41) and the radial air passage (43) form a communication channel; the vacuum interface is connected to a vacuum device, and the insert is adsorbed and fixed through the negative pressure channel formed by the axial air passage (44), the radial air passage (43), and the axial through hole (41).

[0021] The preferred technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: the plurality of cores (2) are fixed on a core fixing member (3), and the driving cylinder (1) is connected to and drives the core fixing member (3) to move axially.

[0022] The preferred technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: the main body of the insert (4) is cylindrical, the radial air passage (43) has a ring number of at least 3, and is evenly distributed along the insert (4).

[0023] The preferred technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: the core fixing part (3) includes a disc part (31) and a connecting shaft (32), and the connecting shaft is connected to the driving cylinder (1) by fasteners;

[0024] The preferred technical solution adopted by this utility model to solve the above-mentioned technical problems is: an aluminum die-casting mold, including a moving mold assembly, a fixed mold assembly, and an aluminum die-casting mold insert fixing device.

[0025] Compared with existing technologies, the advantages of this invention are: a retractable and repositionable core device is provided within the insert. In the repositioned state, the sprayed liquid cannot enter the inner cavity and accumulate water during spraying. In the retracted state, a vacuum extraction space is provided, effectively utilizing the negative pressure created by the vacuum valve to tightly fix the insert to the mold cavity. The vertical and horizontal exhaust channels inside the insert are directly connected, ensuring a smooth connection path and allowing gas to be drawn into the vacuum valve more smoothly and unimpeded, guaranteeing the continuity of the negative pressure state within the channels. Attached Figure Description

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be construed as limiting the scope of the present invention. Furthermore, unless specifically indicated, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated depictions, and the drawings are not necessarily drawn to scale.

[0027] Figure 1 This is a schematic diagram of an insert in the background art and embodiments. Figure 1 ;

[0028] Figure 2 This is a schematic diagram of an insert in the background art and embodiments. Figure 2 ;

[0029] Figure 3 This is a schematic diagram of a novel insert fixing device for aluminum die-casting molds in the background art;

[0030] Figure 4 A partial schematic diagram of the air extraction section of a novel insert fixing device for aluminum die casting molds. Figure 1 ;

[0031] Figure 5A partial schematic diagram of the core retraction portion of a novel insert fixing device for aluminum die casting molds. Figure 2 ;

[0032] Figure 6 A partial schematic diagram of the air extraction section of a novel insert fixing device for aluminum die casting molds. Figure 3 ;

[0033] Reference numerals: 1-Drive cylinder; 2-Core; 3-Core fixing part; 4-Insert; 31-Disc part; 32-Connecting shaft; 41-Axial through hole; 42-Shaping part; 43-Radial air passage; 44-Axial air passage; b-Bolt plug; h-Insert; f-Fastener. Detailed Implementation

[0034] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely descriptive and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0035] It should be noted that similar labels in the following figures indicate similar items; therefore, once an item is defined in one figure, it will not be further defined and explained in subsequent figures.

[0036] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0037] like Figure 3As shown, an aluminum die-casting mold insert (h) fixing device is used to fix an open insert (h). It is characterized by comprising: a driving cylinder (1), multiple cores (2), a core fixing component (3), and an insert (4); the insert (4) has an axial through hole (41), the core (2) is fixed to the core fixing component (3), the driving cylinder (1) connects to and drives the core fixing component (3), causing the core (2) to move axially within the axial through hole (41); the front end of the insert (4) has a contouring part (42), and the front section of the insert (4) near the contouring part (42) has multiple radial air passages (43) radiating outwards from the center, corresponding in number to the cores. The axial through hole (41) passes through the radial air passage (43); the insert (4) is provided with an axial air passage (44) in the middle, the inner end of the axial air passage (44) is connected to the center intersection of each radial air passage (43), and the outer end extends to the end of the insert for connecting to a vacuum device; the core (2) has a first position and a second position: in the first position, the front end face of the core is flush with the outer end face of the molding part (42); in the second position, the core (2) moves backward so that the axial through hole (41) and the radial air passage (43) form a connecting channel, and the insert (h) is adsorbed and fixed through the negative pressure channel formed by the axial air passage (44), the radial air passage (43) and the axial through hole (41).

[0038] like Figure 4 As shown, the contour part (42) has a stepped concave-convex structure, and the insert (h) matches the stepped concave-convex structure. The radial air passage (43) extends to the outer peripheral wall of the insert (4), and the outer end of the radial air passage is provided with a bolt plug (b). The main body of the insert (4) is cylindrical, and the radial air passage (43) has at least 3 annular rings, which are evenly distributed along the annular ring of the insert (4).

[0039] Preferably, this design enables the drive cylinder (1) to have precise control and core movement stability. The drive cylinder (1) is powered by a hydraulic or pneumatic system and is equipped with a high-precision displacement sensor inside, which can provide real-time feedback on the position information of the core fixing part (3). When the drive cylinder (1) receives a retraction command, the core fixing part (3) drives all the cores (2) to move backward synchronously, ensuring that the movement trajectory of the cores (2) in the axial through hole (41) is consistent, and avoiding the offset of the insert (h) due to uneven force on one side. When the core (2) is in the first position, the front end face is strictly flush with the outer end face of the molding part (42) to form a sealing plane and prevent the spray liquid from seeping into the internal air channel; when in the second position, the backward movement distance of the core (2) is precisely controlled by a preset program to ensure that the communication channel between the axial through hole (41) and the radial air channel (43) is fully opened, providing sufficient space for vacuum adsorption.

[0040] like Figure 5 As shown, the core fixing part (3) includes a disc part (31) and a connecting shaft (32), which is connected to the drive cylinder (1) by fasteners.

[0041] like Figure 6 As shown, multiple cores (2) are fixed on a core fixing member (3), and the driving cylinder (1) is connected to and drives the core fixing member (3) to move axially.

[0042] Preferably, the insert (4) is cylindrical in shape, and the radial air passages (43) are arranged in annular numbers of at least 3 and are evenly distributed along the insert (4). The core fixing part (3) includes a disc part (31) and a connecting shaft (32), which is connected to the drive cylinder (1) by fasteners (f).

[0043] This design optimizes the vacuum adsorption system. A tapered transition structure is adopted at the intersection of the axial airway (44) and the radial airway (43) to reduce airflow resistance and improve pumping efficiency. The vacuum equipment is connected to the axial airway (44) at the end of the insert (4) via a quick connector, and a stable negative pressure environment can be formed in a very short time after startup. The negative pressure is evenly distributed to each axial through hole (41) through the radial airway (43), so that the surface of the insert (h) is subjected to uniform force, avoiding loosening caused by insufficient local adsorption force. In addition, the bolt plug (b) at the outer end of the radial airway (43) is made of high-temperature resistant sealing material to ensure that the airway does not leak during the high-pressure die casting process.

[0044] The precise fit between the contouring part (42) and the insert (h) ensures that the stepped concave-convex structure of the contouring part (42) perfectly matches the shape of the insert (h), with precise tolerance control. During installation, the inner wall or outer edge of the insert (h) fits tightly against the concave-convex surface of the contouring part (42), forming a mechanical positioning reference and further limiting the lateral displacement of the insert (h). The stepped structure also provides a pre-fixing effect before vacuum adsorption, reducing the initial offset of the insert (h) caused by gravity or robot vibration.

[0045] Preferably, the insert material and the air passage maintenance insert are made of materials that can withstand the high temperature and high pressure impact of molten aluminum. The inner walls of the radial air passage (43) and the axial air passage (44) are polished to reduce the risk of carbon buildup. A removable bolt plug (b) is connected to a high-pressure air gun to back-purge residues from the air passage, ensuring long-term unobstructed air passages.

[0046] More preferably, the aluminum die-casting mold includes a moving mold assembly, a fixed mold assembly, and any one of the aluminum die-casting mold insert (h) fixing devices.

[0047] like Figure 1-2 As shown, the insert (h) is a thin-walled sleeve product, which is a part with special technical requirements. During the die casting process, it is necessary to avoid the position of the insert (h) from moving as much as possible to prevent affecting the product's functional accuracy.

[0048] The specific steps for using the above-mentioned aluminum die-casting mold to fix the insert (h) include:

[0049] Step 1: The mold is opened, the core (2) is reset to the first position, and the robot sprays and blows air on the mold cavity to ensure that there is no water or impurities in the cavity.

[0050] Step 2: The robot arm installs the insert (h) onto the contour part (42) of the insert (4), ensuring that the contact surfaces of the insert (h) and the insert (4) fit tightly together.

[0051] Step 3: Drive the hydraulic cylinder (1) to drive the core (2) back to the second position, start the vacuum equipment, and use the negative pressure channel to tightly adsorb and fix the insert (h) onto the insert (4).

[0052] Step 4: The mold is closed, and the molten aluminum enters the material cylinder and reaches the inner gate.

[0053] Step 5: Core reset and vacuum shut-off. The core (2) is reset to the first position and the vacuum is shut off to ensure that the aluminum liquid fills the mold cavity smoothly.

[0054] Step Six: Die casting is performed, where the molten aluminum solidifies and takes shape within the mold cavity.

[0055] Step 7: After die casting is completed, the mold is opened, and the insert (h) is removed together with the casting, completing the entire die casting process.

[0056] In practice, when using this new insert (h) fixing device on aluminum die-casting molds, compared with molds that conventionally place inserts (h), the probability of insert (h) misalignment is reduced. Die-casting operations using this new insert (h) fixing device are simple, highly efficient and reliable.

[0057] This invention introduces the aluminum die-casting mold insert fixing device and the aluminum die-casting mold provided by this utility model. Specific examples are used to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand this utility model and its core ideas. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A device for fixing inserts in aluminum die-casting molds, used to fix open inserts, characterized in that, include: Drive cylinder (1), multiple cores (2), core fixing parts (3) and inserts (4); The insert (4) has an axial through hole (41), the core (2) is fixed to the core fixing member (3), and the driving cylinder (1) is connected to and drives the core fixing member (3) so that the core (2) moves axially in the axial through hole (41). The insert (4) has a contour part (42) at its front end. The insert (4) has multiple radial air passages (43) at its front end near the contour part (42), the number of which corresponds to the core and radiates outward from the center. The axial through hole (41) passes through the radial air passages (43). The insert (4) has an axial air passage (44) in the middle. The inner end of the axial air passage (44) is connected to the center of each radial air passage (43), and the outer end extends to the end of the insert for connecting to a vacuum device. The core (2) has a first position and a second position: in the first position, the front end face of the core is flush with the outer end face of the molding part (42); in the second position, the core (2) moves backward so that the axial through hole (41) and the radial air passage (43) form a communication channel, and the insert (h) is adsorbed and fixed through the negative pressure channel formed by the axial air passage (44), the radial air passage (43) and the axial through hole (41).

2. The aluminum die-casting mold insert fixing device according to claim 1, characterized in that: The contouring part (42) is provided with a stepped concave-convex structure, and the insert (h) matches the stepped concave-convex structure.

3. The aluminum die-casting mold insert fixing device according to claim 1, characterized in that: The radial air passage (43) extends through the outer peripheral wall of the insert (4), and the outer end of the radial air passage is provided with a bolt plug (b).

4. The aluminum die-casting mold insert fixing device according to claim 1, characterized in that: The main body of the insert (4) is cylindrical, and the radial air passages (43) have at least 3 annular rings, which are evenly distributed along the insert (4).

5. The aluminum die-casting mold insert fixing device according to claim 1, characterized in that: The core fixing component (3) includes a disc portion (31) and a connecting shaft (32), which is connected to the drive cylinder (1) by fasteners.

6. A device for fixing inserts in aluminum die-casting molds, used to fix open inserts, characterized in that, include: Drive cylinder (1), multiple cores (2) and inserts (4); The insert (4) is provided with an axial through hole (41), and the driving cylinder (1) drives the core (2) to move axially within the axial through hole (41); The front end of the insert (4) is provided with a contour part (42) that matches the insert (h). The insert is provided with a plurality of radial air passages (43) that radiate outward from the center in a number corresponding to the core. The axial through hole (41) passes through the radial air passages (43). The insert (4) has an axial air passage (44) in the middle. The inner end of the axial air passage (44) is connected to the center of each radial air passage (43), and the outer end extends to the end of the insert and has a vacuum interface. The core (2) has a first position and a second position: in the first position, the front end face of the core is flush with the outer end face of the molding part (42); in the second position, the core (2) moves backward so that the axial through hole (41) and the radial air passage (43) form a communication channel; the vacuum interface is connected to a vacuum device, and the insert (h) is adsorbed and fixed through the negative pressure channel formed by the axial air passage (44), the radial air passage (43) and the axial through hole (41).

7. The aluminum die-casting mold insert fixing device according to claim 6, characterized in that: The plurality of cores (2) are fixed on a core fixing member (3), and the driving cylinder (1) is connected to and drives the core fixing member (3) to move axially.

8. The aluminum die-casting mold insert fixing device according to claim 6, characterized in that: The main body of the insert (4) is cylindrical, and the radial air passages (43) have at least 3 annular rings, which are evenly distributed along the insert (4).

9. The aluminum die-casting mold insert fixing device according to claim 7, characterized in that: The core fixing component (3) includes a disc portion (31) and a connecting shaft (32), which is connected to the drive cylinder (1) by fasteners.

10. An aluminum die-casting mold, characterized in that... It includes a moving mold assembly, a fixed mold assembly, and an aluminum die-casting mold insert fixing device as described in any one of claims 1-9.

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