A die-casting forming mechanism based on extrusion pin linkage

Abstract

The utility model relates to the technical field of die casting forming, specifically relates to a kind of die casting forming mechanism based on extrusion pin linkage, including upper connecting plate;Limiting frame, the top of the limiting frame is connected with the bottom of the upper connecting plate;Upper die, the upper die is set in the bottom of the limiting frame;Inclined plate, the inclined plate is set in the top of the limiting frame, and the thick wall area of die casting is accurately second extruded by extrusion pin, local high pressure can be applied in the solidification process of metal liquid, forced feeding is carried out, thereby significantly reducing or eliminating the shrinkage porosity, shrinkage and other casting defects generated by thick wall part shrinkage, the compactness and overall quality of die casting are improved, and the horizontal thrust is converted into the vertical movement of extrusion pin by the lateral movement of sliding block and the slope on it and the slope of inclined plate cooperation.This kind of pure mechanical linkage mode structure is compact, transmission is direct, and response is rapid.

Description

Technical Field

[0001] This utility model belongs to the field of die casting technology, specifically relating to a die casting mechanism based on extrusion pin linkage. Background Technology

[0002] Die casting technology, as a highly efficient metal parts manufacturing process, is widely used in the automotive, electronics, home appliance, and aerospace industries. Its core principle is to rapidly press molten metal into a mold cavity under high pressure, and then obtain a casting of a predetermined shape after the molten metal cools and solidifies. With downstream industries continuously increasing their requirements for parts precision, density, and production efficiency, the structural rationality, coordination, and forming stability of the die casting mechanism have become key factors affecting product quality.

[0003] However, after the molten metal is injected, it is easy to form pores and shrinkage cavities. Existing mechanisms lack a secondary extrusion structure, which cannot promote metal filling and venting. The lower mold is mostly fixed directly and lacks a lateral positioning and fine adjustment structure. Long-term use can easily cause it to shift, resulting in flash and dimensional deviations in the castings. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art, such as insufficient filling of molten metal and the generation of porosity and shrinkage cavities in die casting mechanisms due to the lack of a secondary extrusion structure, and the absence of lateral positioning and fine adjustment function in the lower mold, which can easily lead to displacement and casting defects after long-term use. The invention aims to realize a die casting forming mechanism based on extrusion pin linkage.

[0005] To achieve the above-mentioned objectives, the technical solution of this utility model is: a die-casting mechanism based on extrusion pin linkage, comprising: an upper connecting plate;

[0006] A limiting frame, the top of which is connected to the bottom of the upper connecting plate;

[0007] An upper mold, wherein the upper mold is disposed at the bottom of the limiting frame;

[0008] An inclined plate is disposed at the top of the limiting frame;

[0009] A pressing pin, the top of which is connected to the bottom of the inclined plate; and a feed pipe, a through hole for the feed pipe to pass through on one side of the upper connecting plate and the limiting frame, the feed pipe passing through the through hole.

[0010] The die-casting mechanism based on extrusion pin linkage described above also includes a base, which is located below the limiting frame.

[0011] A lower connecting plate, which is connected to the bottom of the base;

[0012] The lower mold, which is fixed inside the base; and

[0013] A limiting block is fixed to one side of the top of the lower mold. The bottom of the feed pipe is inserted into the outer surface of the limiting block, and the limiting block has a groove on the side facing the lower mold.

[0014] The die-casting molding mechanism based on the extrusion pin linkage mentioned above also includes a limiting sleeve, which is fixed to the upper mold. The extrusion pin is slidably connected to the inner wall of the limiting sleeve, and the bottom end of the extrusion pin extends to the bottom of the upper mold.

[0015] A reset spring is disposed inside the limiting sleeve and is used to reset the pressing pin.

[0016] The die-casting mechanism based on extrusion pin linkage described above also includes a sliding block, which is slidably connected to one side of the limiting frame, and an inclined surface adapted to the inclined plate is provided on one side of the bottom of the sliding block.

[0017] The die-casting mechanism based on extrusion pin linkage described above also includes a first sliding plate, which is slidably connected to one side of the top of the base.

[0018] A conical column, wherein the conical column is fixed to one end of the first sliding plate;

[0019] A connecting column, the top of which is connected to the bottom of the conical column; and a limiting groove, the lower mold having a limiting groove through which the connecting column passes.

[0020] The die-casting mechanism based on extrusion pin linkage described above also includes a second sliding plate, which is slidably connected to the other side of the top of the base; and a connecting shaft, which is connected to one side of the second sliding plate and extends above the lower mold side.

[0021] In the above-mentioned die-casting molding mechanism based on extrusion pin linkage, one end of the sliding block protrudes outward to one side of the limiting frame. By pushing the protruding end of the sliding block, the sliding block can move laterally and push the inclined plate using its inclined surface.

[0022] In the above-mentioned die-casting molding mechanism based on extrusion pin linkage, one side of the first sliding plate and the second sliding plate respectively extends to the outer surface of the base, and inclined grooves are provided on both sides of the base below the first sliding plate and the second sliding plate.

[0023] Compared with the prior art, the die-casting molding mechanism based on extrusion pin linkage of this utility model has at least the following beneficial effects:

[0024] 1. The die-casting forming mechanism based on extrusion pin linkage of this utility model performs precise secondary extrusion on the thick-walled area of ​​the die-casting part through extrusion pin. It can apply local high pressure during the solidification process of molten metal and force feeding, thereby significantly reducing or eliminating casting defects such as shrinkage cavities and porosity caused by shrinkage in thick-walled parts, and improving the density and overall quality of the die-casting part.

[0025] 2. By the lateral movement of the sliding block and the engagement of its inclined surface with the inclined plate, the horizontal thrust is converted into the vertical movement of the pressing pin. This purely mechanical linkage method features a compact structure, direct transmission, and rapid response.

[0026] 3. The base, through the conical column and connecting column assembly of the first sliding plate, cooperates with the lower mold limiting groove, and combined with the lateral support structure of the second sliding plate, can realize multi-dimensional fine adjustment and stable positioning of the lower mold, reduce casting size deviation caused by mold offset, and improve molding accuracy. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0028] Figure 2 This is a first sectional view of the entire utility model;

[0029] Figure 3 This is a second sectional view of the entire utility model;

[0030] Figure 4 This is a first exploded schematic diagram of this utility model;

[0031] Figure 5 This is a second explosion diagram of the present invention;

[0032] Figure 6 This is a third explosion diagram of this utility model.

[0033] In the diagram: 1. Upper connecting plate; 2. Limiting frame; 3. Feed pipe; 4. Sliding block; 5. Base; 6. Lower connecting plate;

[0034] 7. First sliding plate; 701. Connecting column; 702. Second sliding plate; 703. Connecting shaft; 704. Conical column;

[0035] 8. Inclined groove; 9. Lower mold; 10. Inclined plate; 11. Extrusion pin; 12. Limiting sleeve; 13. Limiting block; 14. Upper mold. Detailed Implementation

[0036] The die-casting molding mechanism based on extrusion pin linkage of this utility model will be described in more detail below with reference to the accompanying drawings and specific embodiments.

[0037] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. 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.

[0038] This embodiment discloses a die-casting molding mechanism based on extrusion pin linkage. The die-casting mechanism lacks a secondary extrusion structure, leading to insufficient molten metal filling and resulting in porosity and shrinkage cavities. Furthermore, the lower mold lacks lateral positioning and fine-tuning functions, which can easily cause displacement and casting defects over long-term use. (Refer to...) Figures 1-6 It mainly includes: an upper connecting plate 1; a limiting frame 2, the top of which is connected to the bottom of the upper connecting plate 1; an upper mold 14, which is located at the bottom of the limiting frame 2; an inclined plate 10, which is located at the top of the limiting frame 2; an extrusion pin 11, the top of which is connected to the bottom of the inclined plate 10; and a feed pipe 3, with a through hole for the feed pipe 3 to pass through on one side of the upper connecting plate 1 and the limiting frame 2.

[0039] The limiting frame 2 not only serves a connecting function, but more importantly, it provides precise guidance and limiting protection for the movement of the internal components. The upper mold 14, located at the bottom of the limiting frame 2, is the core component that directly participates in metal forming, and its positional accuracy is guaranteed by the limiting frame.

[0040] The inclined plate 10 is located at the top of the limiting frame 2, and its function is to convert the received lateral driving force into vertical movement. The extrusion pin 11 is connected to the bottom of the inclined plate 10, thereby inheriting and executing this vertical action, ultimately achieving precise secondary extrusion of the molten metal in the mold cavity, which helps to eliminate defects in the thick-walled area of ​​the workpiece.

[0041] The feed pipe 3 passes through the specially designed through hole between the upper connecting plate 1 and the limiting frame 2. This design ensures that the pouring path of the molten metal is independent and stable, avoiding interference with other moving parts.

[0042] Reference Figures 1-3 It also includes a base 5, which is located below the limiting frame 2; a lower connecting plate 6, which is connected to the bottom of the base 5; a lower mold 9, which is fixed inside the base 5; and a limiting block 13, which is fixed to one side of the top of the lower mold 9. The bottom of the feed pipe 3 is inserted into the outer surface of the limiting block 13, and the limiting block 13 has a groove on the side facing the lower mold 9.

[0043] It also includes a limiting sleeve 12, which is fixed to the upper mold 14. The extrusion pin 11 is slidably connected to the inner wall of the limiting sleeve 12, and the bottom end of the extrusion pin 11 extends to the bottom of the upper mold 14. A reset spring is provided inside the limiting sleeve 12 and is used to reset the extrusion pin 11.

[0044] The lower connecting plate 6 at the bottom of the base 5 further enhances the stability and rigidity of the overall structure. The lower mold 9, as a key part of the molding process, is fixed inside the base 5 and precisely cooperates with the upper mold 14 to form the cavity.

[0045] The limiting block 13 is not only used to accurately position and receive the bottom of the feed pipe 3, but the specific groove on its side also forms a key channel for the molten metal to flow into the cavity, ensuring the stability and controllability of the casting process.

[0046] To ensure the precision and stability of the extrusion action, the extrusion pin 11 is constrained within the limiting sleeve 12 fixed to the upper die 14, ensuring the perpendicularity of its movement trajectory. The return spring integrated inside the limiting sleeve 12 provides an automatic reset function for the extrusion pin 11, ensuring the repeatability and reliability of each die-casting cycle.

[0047] Reference Figures 1-3 and Figure 6 It also includes a sliding block 4, which is slidably connected to one side of the limiting frame 2. The bottom side of the sliding block 4 has an inclined surface adapted to the inclined plate 10. One end of the sliding block 4 protrudes outward from one side of the limiting frame 2. By pushing the protruding end of the sliding block 4, the sliding block 4 can move laterally and push the inclined plate 10 using its inclined surface.

[0048] The inclined surface of the sliding block 4 ensures a seamless fit with the inclined surface of the inclined plate 10, resulting in lossless force transmission during pushing. The protruding end is treated with an anti-slip texture, facilitating precise force application by operators or robotic arms. The lateral movement trajectory is constrained by the guide groove within the limiting frame 2, preventing deviation that could lead to operational failure. The inclined surface of the sliding block 4 and the inclined surface of the inclined plate 10 form a wedge-shaped transmission structure, efficiently converting the lateral thrust into the vertical lifting motion of the inclined plate 10, thereby driving the extrusion pin 11 to complete a precise extrusion action.

[0049] Reference Figure 1 and Figures 4-6 It also includes a first sliding plate 7, which is slidably connected to one side of the top of the base 5; a cone column 704, which is fixed to one end of the first sliding plate 7; a connecting column 701, the top of which is connected to the bottom of the cone column 704; and a limiting groove 901, which is provided on the lower mold 9 for the connecting column 701 to pass through.

[0050] It also includes a second sliding plate 702, which is slidably connected to the other side of the top of the base 5; and a connecting shaft 703, which is connected to one side of the second sliding plate 702 and extends to the upper part of one side of the lower mold 9. One side of the first sliding plate 7 and the second sliding plate 702 respectively extends to the outer surface of the base 5, and inclined grooves 8 are formed on both sides of the base 5 below the first sliding plate 7 and the second sliding plate 702.

[0051] The first sliding plate 7 slides into contact with one side of the top of the base 5 via a precision slide rail. Its end cone 704 and connecting column 701 form a rigid connection. The connecting column 701 passes through the limiting groove 901 of the lower mold 9, creating a lateral positioning constraint on the lower mold 9 and effectively counteracting mold displacement caused by die-casting impact. The second sliding plate 702 is symmetrically arranged on the other side of the base 5, with its connecting shaft 703 extending to the upper side of the lower mold 9. During sliding, it applies auxiliary support to the lower mold 9, ensuring uniform forming pressure on the cavity sidewalls. An inclined groove 8 is located below the sliding plate, forming a sliding guide system with the base 5. This ensures the straightness of the sliding plate's trajectory and reduces impact through groove wall friction damping. An operating boss is designed at the exposed end of the sliding plate for easy manual or mechanical driving and rapid positioning adjustment. This design, through the bidirectional synchronous movement of the sliding plates, achieves precise lateral positioning and dynamic fine-tuning of the lower mold 9, avoiding casting flash and dimensional deviations caused by mold displacement after long-term use. It also simplifies the operation process and improves die-casting production efficiency.

[0052] The working principle of the die-casting molding mechanism based on extrusion pin linkage of this utility model is as follows: First, the external driving device is connected to the top of the upper connecting plate 1, pushing the upper connecting plate 1 to move downward, and simultaneously driving the limiting frame 2, the upper mold 14, the inclined plate 10 and the extrusion pin 11 to move downward as a whole, so that the upper mold 14 gradually approaches the lower mold 9.

[0053] Molten metal is injected through the feed pipe 3. The bottom of the feed pipe 3 is inserted into the outer surface of the limiting block 13 at the top of the lower mold 9. The molten metal flows into the cavity space between the lower mold 9 and the upper mold 14 along the groove on the side of the limiting block 13, forming a casting outline of a preset shape.

[0054] When the upper mold 14 approaches the lower mold 9, the sliding block 4 is moved laterally manually or mechanically. The inclined surface at the bottom of the sliding block 4 contacts the inclined surface of the inclined plate 10, and the lateral thrust is converted into the vertical movement of the inclined plate 10 through the inclined surface engagement, thereby driving the extrusion pin 11 to slide within the limiting sleeve 12. The extrusion pin 11 extends to the bottom of the upper mold 14, applying secondary extrusion to the molten metal in the cavity, promoting the full filling of the cavity details and improving the density of the metal.

[0055] The first sliding plate 7 slides on one side of the top of the base 5. The tapered column 704 at its end passes through the limiting groove of the lower mold 9 via the connecting column 701, adjusting the positional accuracy of the lower mold 9 or applying lateral pressure during sliding. The second sliding plate 702 extends to the upper side of the lower mold 9 via the connecting shaft 703, assisting in controlling the molding pressure of the cavity sidewall during sliding. The inclined grooves 8 on both sides of the base 5 provide guiding support for the movement of the sliding plates, ensuring smooth and non-deviation-prone movement.

[0056] After die casting is completed, the external drive device moves the upper connecting plate 1 and the upper mold 14 upwards and resets them. The extrusion pin 11 resets within the limiting sleeve 12, preparing for the next die casting cycle.

[0057] It should be noted that, in actual implementation, the structure depicted in the accompanying drawings is not a fixed or unchanging embodiment. The components of the embodiments of this invention described and shown in these drawings can typically be arranged and designed in various different configurations. Furthermore, the accompanying drawings and abstract drawings are merely illustrative and do not represent the specific structure or actual quantity in a concrete implementation.

[0058] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains. The use of terms such as "a" or "an" in this specification and claims does not necessarily indicate a limitation on quantity. Terms such as "comprising" or "including" mean that the element or component preceding the word encompasses the element or component listed following the word and its equivalents, without excluding other elements or components. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0059] The exemplary embodiments of the present invention have been described in detail above with reference to preferred embodiments. However, those skilled in the art will understand that various modifications and alterations can be made to the above specific embodiments without departing from the concept of the present invention, and various combinations can be made to the various technical features and structures proposed by the present invention without exceeding the protection scope of the present invention.

Claims

1. A die-casting forming mechanism based on extrusion pin linkage, characterized in that, include: Upper connecting plate (1); Limiting frame (2), the top of the limiting frame (2) is connected to the bottom of the upper connecting plate (1); Upper mold (14), the upper mold (14) is disposed at the bottom of the limiting frame (2); An inclined plate (10) is disposed on the top of the limiting frame (2); The top of the extrusion pin (11) is connected to the bottom of the inclined plate (10); and the feed pipe (3) is provided on one side of the upper connecting plate (1) and the limiting frame (2) for the feed pipe (3) to pass through.

2. The die-casting forming mechanism based on extrusion pin linkage according to claim 1, characterized in that: It also includes a base (5), which is disposed below the limiting frame (2); The lower connecting plate (6) is connected to the bottom of the base (5); The lower mold (9) is fixed inside the base (5); and The limiting block (13) is fixed to one side of the top of the lower mold (9), the bottom of the feed pipe (3) is inserted into the outer surface of the limiting block (13), and the limiting block (13) has a groove on the side facing the lower mold (9).

3. The die-casting forming mechanism based on extrusion pin linkage according to claim 2, characterized in that: It also includes a limiting sleeve (12), which is fixed on the upper mold (14), and the extrusion pin (11) is slidably connected to the inner wall of the limiting sleeve (12), and the bottom end of the extrusion pin (11) extends to the bottom of the upper mold (14). A reset spring is disposed inside the limiting sleeve (12) and is used to reset the pressing pin (11).

4. The die-casting forming mechanism based on extrusion pin linkage according to claim 1, characterized in that: It also includes a sliding block (4), which is slidably connected to one side of the limiting frame (2), and the bottom side of the sliding block (4) is provided with an inclined surface that is adapted to the inclined plate (10).

5. The die-casting forming mechanism based on extrusion pin linkage according to claim 2, characterized in that: It also includes a first sliding plate (7), which is slidably connected to one side of the top of the base (5); A conical column (704) is fixed to one end of the first sliding plate (7); A connecting column (701), the top of which is connected to the bottom of the cone column (704); and a limiting groove (901), the lower mold (9) having a limiting groove (901) through which the connecting column (701) passes.

6. The die-casting forming mechanism based on extrusion pin linkage according to claim 5, characterized in that: It also includes a second sliding plate (702) which is slidably connected to the other side of the top of the base (5); and a connecting shaft (703) which is connected to one side of the second sliding plate (702) and extends above one side of the lower mold (9).

7. The die-casting forming mechanism based on extrusion pin linkage according to claim 4, characterized in that: One end of the sliding block (4) protrudes outward to one side of the limiting frame (2). By pushing the protruding end of the sliding block (4), the sliding block (4) can move laterally and push the inclined plate (10) with its inclined surface.

8. The die-casting forming mechanism based on extrusion pin linkage according to claim 6, characterized in that: One side of the first sliding plate (7) and the second sliding plate (702) extend to the outer surface of the base (5), and the two sides of the base (5) are provided with inclined grooves (8) below the first sliding plate (7) and the second sliding plate (702).

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