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

Abstract

The invention 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] The invention 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 Art

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

[0003] Insert is a common aluminum die-casting technology, which is common in automobile parts. Insert, also known as insert casting, is a process of inserting metal or non-metal parts into the die-casting mold first, and then casting them together with the die-casting. This process can make full use of the performance advantages of various materials, such as strength, hardness, corrosion resistance, wear resistance, magnetic conductivity, conductivity, etc., to meet the needs of different use conditions. At the same time, it can also make up for the defects of die-casting parts due to insufficient structural processability and solve the die-casting problems of parts with special technical requirements.

[0004] However, in the process of producing die-cast parts with inserts, the inability to completely fix the inserts has always been a technical difficulty in the industry. Although in actual production, inserts are usually equipped with positioning holes to prevent them from moving left and right in the mold cavity, due to structural limitations, the inserts are still prone to moving forward and backward in the mold cavity. This movement will eventually affect the dimensional accuracy and product function of the casting, becoming a technical problem that needs to be solved urgently. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide an aluminum die-casting mold insert fixing device and method which is convenient to operate, has good fixing effect and high process stability.

[0006] The technical solution adopted by the present invention to solve the above technical problems is: a new type of insert fixing device and method, including a mold insert (4) in contact with the insert; three cores (2) inside the insert (4); the core is connected by a core fixing member (3), and the core fixing member (3) is connected to the cylinder head. The central exhaust system of the insert (4) includes a cross-sectional exhaust duct 1, a cross-sectional exhaust duct 2, a cross-sectional exhaust duct 3 and a vertical exhaust duct, and a transverse exhaust duct. The radial air duct one, radial air duct two, and radial air duct three are connected to the core (2) channel at one end and converge to the radial air duct (43) at the middle position at the other end. The radial air duct (42) is connected to the converged radial exhaust duct (42) at one end and connected to the axial air duct (44) at the other end. The axial air duct (44) is connected to the radial air duct (43) at one end and connected to the vacuum interface outside the mold at the other end.

[0007] The technical solution adopted by the present invention to solve the above technical problem is: an aluminum die-casting mold insert fixing device, used for fixing an opening insert, characterized in that it comprises: a driving cylinder (1), a plurality of cores (2), a core fixing member (3) and an insert (4);

[0008] The insert (4) is provided with an axial through hole (41), the core (2) is fixed to the core fixing part (3), and the driving cylinder (1) is connected to and drives the core fixing part (3) to make the core (2) move axially in the axial through hole (41);

[0009] The front end of the insert (4) is provided with a profiling portion (42), and the front section of the insert (4) near the profiling portion (42) is provided with a plurality of radial air passages (43) radiating outward from the center in a number corresponding to the core, and the axial through hole (41) passes through the radial air passages (43);

[0010] An axial air channel (44) is provided in the middle of the insert (4), the inner end of the axial air channel (44) is communicated with the central intersection of each radial air channel (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 surface of the core is flush with the outer end surface of the imitation portion (42); in the second position, the core (2) moves backward so that the axial through hole (41) and the radial air channel (43) form a connecting channel, and the negative pressure channel formed by the axial air channel (44), the radial air channel (43) and the axial through hole (41) is adsorbed and fixed.

[0012] The preferred technical solution adopted by the present invention to solve the above technical problem is: the profiling portion (42) is provided with a stepped concave-convex structure, and the insert is consistent with the stepped concave-convex structure.

[0013] The preferred technical solution adopted by the invention to solve the above technical problem is: the radial air channel (43) penetrates to the outer peripheral wall of the insert (4), and a bolt plug (b) is provided at the outer end of the radial air channel.

[0014] The preferred technical solution adopted by the invention to solve the above technical problem is: the insert (4) has a cylindrical body, the radial air passages (43) are at least 3 in number and are evenly distributed in an annular shape along the insert (4).

[0015] The preferred technical solution adopted by the invention to solve the above technical problem is: the core fixing member (3) comprises a disc portion (31) and a connecting shaft (32), and the connecting shaft is connected to the driving cylinder (1) through a fastener.

[0016] The technical solution adopted by the present invention to solve the above technical problem is: an aluminum die-casting mold insert fixing device, used for fixing an opening insert, characterized in that it comprises: a driving cylinder (1), a plurality of cores (2) and an insert (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 in the axial through hole (41);

[0018] The front end of the insert (4) is provided with a profiling portion (42) that matches the insert, the insert is provided with a plurality of radial air passages (43) radiating outward from the center, the number of which corresponds to the core, and the axial through hole (41) passes through the radial air passages (43);

[0019] An axial air channel (44) is provided in the middle of the insert (4), the inner end of the axial air channel (44) is communicated with the central intersection of each radial air channel (43), and the outer end extends to the end of the insert and is provided with a vacuum interface;

[0020] The core (2) has a first position and a second position: in the first position, the front end surface of the core is flush with the outer end surface of the imitation portion (42); in the second position, the core (2) moves backward so that the axial through hole (41) and the radial air channel (43) form a connecting channel; the vacuum interface is connected to the vacuum equipment, and the negative pressure channel formed by the axial air channel (44), the radial air channel (43) and the axial through hole (41) is used to absorb and fix the insert.

[0021] The preferred technical solution adopted by the present invention to solve the above technical problem is: the 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.

[0022] The preferred technical solution adopted by the present invention to solve the above technical problem is: the insert (4) has a cylindrical body, the radial air passages (43) are at least 3 in number and are evenly distributed in an annular shape along the insert (4).

[0023] The preferred technical solution adopted by the present invention to solve the above technical problem is: the core fixing member (3) comprises a disc portion (31) and a connecting shaft (32), and the connecting shaft is connected to the driving cylinder (1) through a fastener;

[0024] The preferred technical solution adopted by the present invention to solve the above technical problems is: an aluminum die-casting mold, including a movable mold component, a fixed mold component and the aluminum die-casting mold insert fixing device.

[0025] Compared with the prior art, the advantages of the present invention are: a core device that can retreat and reset is set in the insert, and the core reset state ensures that the spray liquid cannot enter the inner cavity to form water accumulation during spraying and blowing. In the core retreat state, a vacuum exhaust space is reserved, and the negative pressure formed by the vacuum exhaust valve is effectively utilized to tightly fix the insert on the mold cavity. The vertical exhaust duct inside the insert is directly connected to the horizontal exhaust duct to ensure that the connection path is unobstructed, so that the gas can be more smoothly and unimpededly sucked into the vacuum valve, ensuring the continuity of the negative pressure state in the channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be further described in detail below in conjunction with the accompanying drawings and preferred embodiments, but those skilled in the art will appreciate that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be used as a limitation on the scope of the present invention. In addition, unless otherwise specified, the drawings are only schematically representing the composition or structure of the described objects and may contain exaggerated displays, and the drawings are not necessarily drawn to scale.

[0027] Figure 1 A schematic diagram of an insert in the background technology and embodiments Figure 1 ;

[0028] Figure 2 A schematic diagram of an insert in the background technology and embodiments Figure 2 ;

[0029] Figure 3 It is a schematic diagram of a novel insert fixing device for an aluminum die-casting mold in the background technology;

[0030] Figure 4 A partial schematic diagram of the exhaust part of a new insert fixing device for aluminum die casting mold Figure 1 ;

[0031] Figure 5 Partial schematic diagram of the core retraction part for implementing a new insert fixing device for aluminum die casting mold Figure 2 ;

[0032] Figure 6 A partial schematic diagram of the exhaust part of a new insert fixing device for aluminum die casting mold Figure 3 ;

[0033] Figure numerals: 1-driving cylinder; 2-core; 3-core fixing piece; 4-insert; 31-disc portion; 32-connecting shaft; 41-axial through hole; 42-profile portion; 43-radial air passage; 44-axial air passage; b-bolt plug; h-insert; f-fastener. DETAILED DESCRIPTION

[0034] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It will be appreciated by those skilled in the art that these descriptions are only illustrative and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0035] It should be noted that like reference numerals denote similar items in the following drawings, and thus, once an item is defined in one drawing, it will not be further defined or explained in the subsequent drawings.

[0036] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "front", "back", "left", "right", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the inventive product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0037] like Figure 3As shown, an aluminum die-casting mold insert (h) fixing device is used to fix an open insert (h), characterized in that it includes: a driving cylinder (1), a plurality of cores (2), a core fixing member (3) and an insert (4); an axial through hole (41) is provided in the insert (4), 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) to make the core (2) move axially in the axial through hole (41); a profiling portion (42) is provided at the front end of the insert (4), and a plurality of radial air channels (43) radiating from the center to the outside are provided near the profiling portion (42) at the front section of the insert (4), the number of which corresponds to the core, The axial through hole (41) passes through the radial air channel (43); an axial air channel (44) is provided in the middle of the insert (4); the inner end of the axial air channel (44) is connected to the central intersection of each radial air channel (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 surface of the core is flush with the outer end surface of the imitation part (42); in the second position, the core (2) moves backward to form a connecting channel between the axial through hole (41) and the radial air channel (43), and the insert (h) is adsorbed and fixed through the negative pressure channel formed by the axial air channel (44), the radial air channel (43) and the axial through hole (41).

[0038] like Figure 4 As shown, the imitation part (42) is provided with a stepped concave-convex structure, and the insert (h) matches the stepped concave-convex structure. The radial air channel (43) penetrates the outer peripheral wall of the insert (4), and the outer end of the radial air channel is provided with a bolt plug (b). The insert (4) body is cylindrical, and the number of the radial air channels (43) is at least 3, and they are evenly distributed along the insert (4).

[0039] Preferably, this design enables the driving cylinder (1) to have precise control and core movement stability. The driving cylinder (1) is powered by a hydraulic or pneumatic system, and a high-precision displacement sensor is provided inside the driving cylinder (1) to provide real-time feedback of the position information of the core fixing member (3). When the driving cylinder (1) receives a retreat command, the core fixing member (3) drives all the cores (2) to move backward synchronously, ensuring that the movement trajectory of the core (2) in the axial through hole (41) is consistent, thereby 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 profiling portion (42), forming a sealing plane to prevent the spray liquid from penetrating 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, ensuring that the connecting channel between the axial through hole (41) and the radial air channel (43) is fully open, providing sufficient space for vacuum adsorption.

[0040] like Figure 5 As shown, the core fixing member (3) comprises a disc portion (31) and a connecting shaft (32), and the connecting shaft is connected to the driving cylinder (1) via a fastener.

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

[0042] Preferably, the insert (4) body is cylindrical, the number of radial air channels (43) is at least 3, and they are evenly distributed along the insert (4). The core fixing member (3) comprises a disc portion (31) and a connecting shaft (32), and the connecting shaft is connected to the driving cylinder (1) via a fastener (f).

[0043] This design is optimized on the vacuum adsorption system. A conical transition structure is used at the intersection of the axial air channel (44) and the radial air channel (43), which can reduce air flow resistance and improve air extraction efficiency. The vacuum equipment is connected to the axial air channel (44) at the end of the insert (4) through a quick connector. After startup, a stable negative pressure environment can be formed in an ultra-short time. The negative pressure is evenly distributed to each axial through hole (41) through the radial air channel (43), so that the surface of the insert (h) is evenly stressed, avoiding loosening caused by insufficient local adsorption force. In addition, the bolt plug (b) at the outer end of the radial air channel (43) is made of high-temperature resistant sealing material to ensure that the air channel does not leak during the high-pressure die-casting process.

[0044] The imitation part of the mechanism is precisely matched with the insert (h), and the stepped concave-convex structure of the imitation part (42) is completely matched with the outer shape of the insert (h), and the tolerance control is accurate. When the insert (h) is installed, its inner wall or outer edge is tightly fitted with the concave-convex surface of the imitation part (42), forming a mechanical positioning reference, further limiting the lateral displacement of the insert (h). The step structure can also provide a pre-fixing effect before vacuum adsorption, reducing the initial offset of the insert (h) caused by gravity or vibration of the manipulator.

[0045] Preferably, the insert material and the airway maintenance insert are made of materials that can withstand the high temperature and high pressure impact of aluminum liquid. The inner walls of the radial airway (43) and the axial airway (44) are polished to reduce the risk of carbon deposition. The removable bolt plug (b) is connected to a high-pressure air gun to reversely purge the residue in the airway to ensure that the airway is unobstructed for a long time.

[0046] More preferably, the aluminum die-casting mold comprises a movable 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 and a part with special technical requirements. During the die-casting process, the position of the insert (h) should be avoided as much as possible to prevent it from affecting the functional accuracy of the product.

[0048] The above-mentioned aluminum die-casting mold fixing insert (h) method includes the following specific steps:

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

[0050] Step 2: The manipulator installs the insert (h) onto the contoured portion (42) of the insert (4), ensuring that the contact surfaces of the insert (h) and the insert (4) are tightly matched.

[0051] Step 3: The driving cylinder (1) drives the core (2) to return to the second position, and the vacuum device is started to tightly adsorb and fix the insert (h) on the insert (4) through the negative pressure channel.

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

[0053] Step 5: core resetting and vacuum closing: the core (2) is reset to the first position and the vacuum is closed to ensure that the aluminum liquid can smoothly fill the mold cavity.

[0054] Step 6: Die casting is performed, and the aluminum liquid solidifies and forms in the mold cavity.

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

[0056] According to practice, after using the aluminum die-casting mold using this new insert (h) fixing device, compared with the mold with conventional insert (h) placement, the probability of insert (h) deviation is reduced in the die-casting mold using the new insert (h) fixing device. The die-casting operation using this new insert (h) fixing device is simple, efficient and reliable.

[0057] The aluminum die-casting mold insert fixing device and the aluminum die-casting mold provided by the present invention are introduced. The principle and implementation method of the present invention are explained by using specific examples in this article. The description of the above embodiments is only used to help understand the present invention and its core ideas. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made to the present invention without departing from the principle of the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. An aluminum die casting mold insert fixing device for fixing an opening insert, characterized in that: include: A driving cylinder (1), a plurality of cores (2), a core fixing member (3) and an insert (4); The insert (4) is provided with an axial through hole (41), the core (2) is fixed to the core fixing part (3), and the driving cylinder (1) is connected to and drives the core fixing part (3) to make the core (2) move axially in the axial through hole (41); The front end of the insert (4) is provided with a profiling portion (42), and the front section of the insert (4) near the profiling portion (42) is provided with a plurality of radial air passages (43) radiating outward from the center in a number corresponding to the core, and the axial through hole (41) passes through the radial air passages (43); An axial air channel (44) is provided in the middle of the insert (4), the inner end of the axial air channel (44) is communicated with the central intersection of each radial air channel (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 surface of the core is flush with the outer end surface of the imitation portion (42); in the second position, the core (2) moves backward so that the axial through hole (41) and the radial air channel (43) form a connecting channel, and the negative pressure channel formed by the axial air channel (44), the radial air channel (43) and the axial through hole (41) is adsorbed and fixed.

2. The aluminum die casting mold insert fixing device according to claim 1, characterized in that: The profiling portion (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) penetrates the outer peripheral wall of the insert (4), and a bolt plug (b) is provided at the outer end of the radial air passage.

4. The aluminum die casting mold insert fixing device according to claim 1, characterized in that: The insert (4) has a cylindrical body, and the radial air passages (43) are at least 3 in number and are evenly distributed in an annular shape along the insert (4).

5. The aluminum die-casting mold insert fixing device according to claim 1, characterized in that: The core fixing member (3) comprises a disc portion (31) and a connecting shaft (32), and the connecting shaft is connected to the driving cylinder (1) via a fastener.

6. An aluminum die casting mold insert fixing device for fixing an opening insert, characterized in that: include: A driving cylinder (1), a plurality of cores (2) and an insert (4); The insert (4) is provided with an axial through hole (41), and the driving cylinder (1) drives the core (2) to move axially in the axial through hole (41); The front end of the insert (4) is provided with a profiling portion (42) that matches the insert (h), and the insert is provided with a plurality of radial air passages (43) radiating outward from the center, the number of which corresponds to the core, and the axial through hole (41) passes through the radial air passages (43); An axial air channel (44) is provided in the middle of the insert (4), the inner end of the axial air channel (44) is connected to the central intersection of each radial air channel (43), and the outer end extends to the end of the insert and is provided with a vacuum interface; The core (2) has a first position and a second position: in the first position, the front end surface of the core is flush with the outer end surface of the imitation part (42); in the second position, the core (2) moves backward so that the axial through hole (41) and the radial air channel (43) form a connecting channel; the vacuum interface is connected to the vacuum equipment, and the negative pressure channel formed by the axial air channel (44), the radial air channel (43) and the axial through hole (41) is adsorbed and fixed.

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 oil 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 insert (4) has a cylindrical body, and the radial air passages (43) are at least 3 in number and are evenly distributed in an annular shape along the insert (4).

9. The aluminum die casting mold insert fixing device according to claim 7, characterized in that: The core fixing member (3) comprises a disc portion (31) and a connecting shaft (32), and the connecting shaft is connected to the driving cylinder (1) via a fastener.

10. Aluminum die casting mold, characterized by It comprises a movable die assembly, a fixed die assembly and an aluminum die-casting die insert fixing device as described in any one of claims 1-9.

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