A double extrusion pin structure

Abstract

The utility model discloses a double extrusion pin structure, including connecting block, both opposite sides of connecting block all is provided with the mounting groove, the mounting groove is installed with one extrusion pin respectively, the mounting groove is cooperated with the fastening block, the connecting block still is connected with the joint for connecting the oil cylinder, the utility model sets up double extrusion pin structure, and the extrusion pin places wall thickness position and carries out synchronous local extrusion, improves the internal shrinkage of wall thickness position, improves the product air tightness. The power source of double extrusion pin is same, saves a power source, and ensures the synchronous extrusion of two extrusion pins, lays the foundation for improving air tightness. The stable installation of extrusion pin is realized with cooperation fastening block, and it is convenient to dismantle and replace.

Description

Technical Field

[0001] This utility model relates to extrusion pins, specifically a double extrusion pin structure. Background Technology

[0002] Diesel engine fuel pumps have strict airtightness requirements inside the pump body. In die casting production, the local wall thickness is relatively large, resulting in a long solidification time and causing shrinkage cavities in some areas. Generally, an extrusion pin is designed for extrusion die casting, but shrinkage cavities still cannot be avoided. Some equipment is equipped with dual extrusion pins, but these are two power sources. This increases the space occupied by the power source inside the mold and makes it impossible to maintain the synchronization of the two extrusion pins. Replacing the extrusion pins is also inconvenient. Utility Model Content

[0003] To address the shortcomings of the existing technology, this invention provides a double-extrusion pin structure. This structure features double extrusion pins that are positioned at the thickest part of the wall for simultaneous localized extrusion, improving the internal shrinkage at that location and enhancing the product's airtightness. The double extrusion pins share a single power source, saving one power source and ensuring simultaneous extrusion by both pins, thus laying the foundation for improved airtightness. A fastening block ensures stable installation of the extrusion pins and facilitates disassembly and replacement.

[0004] To achieve the above technical objectives, the present invention adopts the following technical solution: a double extrusion pin structure, including a connecting block, wherein each of the two opposite sides of the connecting block is provided with an installation groove, and an extrusion pin is respectively installed in the installation groove. The installation groove is fitted with a fastening block, and the connecting block is also connected to a connector for connecting a hydraulic cylinder.

[0005] The mounting groove includes a rod groove and a head groove that are interconnected. The extrusion pin includes a rod and a head, with the rod placed in the rod groove and the head placed in the head groove.

[0006] The depth of the groove in the rod is greater than the outer diameter of the rod, and the depth of the groove in the head is greater than the outer diameter of the head.

[0007] The fastening block includes a limiting plate, a pressure rod block, and a pressure head block that are fixedly connected in sequence. The pressure rod block is placed in the rod groove to press down the rod, the pressure head block is placed in the head groove to press down the head, and the limiting plate is placed on the end face of the connecting block.

[0008] The bottom surfaces of the limiting plate and the pressure bar block are both provided with pressure bar grooves, which contact the surface of the rod. The bottom surface of the pressure head block is provided with a pressure head groove, which contacts the surface of the head.

[0009] The fastening block is provided with a locking groove, which extends through the limiting plate, the pressure rod block, and the pressure head block; the connecting block is provided with a threaded groove, and the fastening block is locked in the mounting groove by a long screw.

[0010] The outer surface of the fastening block is flush with the outer surface of the connecting block.

[0011] The connecting block is provided with a T-slot, the connector is provided with a T-block, and the T-block is locked in the T-slot.

[0012] The extrusion pin includes a first extrusion pin and a second extrusion pin. The first extrusion pin includes a first rod portion and a first head portion, and the first rod portion is fitted with a first guide sleeve that is axially slidably connected. The second extrusion pin includes a second rod portion and a second head portion, and the second rod portion is fitted with a second guide sleeve that is axially slidably connected.

[0013] In summary, this utility model achieves the following technical effects: This invention features a double-extrusion pin structure. The extrusion pins are placed at the wall thickness position for synchronous local extrusion, improving the internal shrinkage at the wall thickness position and enhancing the product's airtightness. The double extrusion pins share a single power source, saving one power source and ensuring synchronous extrusion by both pins, thus laying the foundation for improved airtightness. This invention effectively controls defects such as shrinkage cavities caused by slow solidification of molten metal in thicker areas of the product wall, and the quenching layer of molten aluminum. This not only improves the mechanical properties of the product, but also enhances its pressure resistance and airtightness, enabling aluminum alloy die-castings to be used in safety components and structural parts with higher sealing requirements. Attached Figure Description

[0014] Figure 1 It is a double-extrusion pin structure; Figure 2 yes Figure 1 Partial cross-sectional view; Figure 3 This is a schematic diagram of the fastening block. Detailed Implementation

[0015] The present invention will be further described in detail below with reference to the accompanying drawings.

[0016] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

[0017] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0018] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0019] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0020] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0021] Example: Figure 1 It is a double extrusion pin structure, including a connecting block 1. The two opposite sides of the connecting block 1 are provided with mounting grooves 11, and each mounting groove 11 is equipped with an extrusion pin. The mounting groove 11 is fitted with a fastening block 5. The connecting block 1 is also connected to a connector 4 for connecting a hydraulic cylinder.

[0022] This invention features a double-extrusion pin structure. The extrusion pins are positioned at the thickest part of the wall for simultaneous localized extrusion, improving the internal shrinkage at that location and enhancing the product's airtightness. Both extrusion pins share a single power source, saving on the need for a separate power source and ensuring simultaneous extrusion by both pins, thus laying the foundation for improved airtightness. A fastening block is used to ensure stable installation of the extrusion pins.

[0023] The mounting groove 11 includes a rod groove 110 and a head groove 111 that are interconnected. The pressing pin includes a rod and a head. The rod is placed in the rod groove 110 and the head is placed in the head groove 111.

[0024] The size of the rod groove 110 is smaller than that of the head groove 111. Combined with the T-shaped structure of the extrusion pin, the length of the rod groove is longer, which can place a long section of the rod of the extrusion pin in the rod groove, thereby improving the stability of the fixation.

[0025] Figure 2 yes Figure 1 Partial cross-sectional view Figure 2 Two fastening blocks 5 are hidden. The depth of the rod groove 110 is greater than the outer diameter of the rod, and the depth of the head groove 111 is greater than the outer diameter of the head.

[0026] The entire extrusion pin is fully submerged into the connecting block and extends a certain distance, and is then secured externally with fastening blocks to improve the stability of the connection.

[0027] Figure 3 This is a schematic diagram of a fastening block. The fastening block 5 includes a limiting plate 53, a pressure rod block 51, and a pressure head block 52 that are fixedly connected in sequence. The pressure rod block 51 is placed in the rod groove 110 to press down the rod. The pressure head block 52 is placed in the head groove 111 to press down the head. The limiting plate 53 is placed on the end face of the connecting block 1.

[0028] The limiting plate is attached to the end face of the connecting block, and the pressure head block 52 is placed in the head groove. The two form a left and right (shown direction) limiting.

[0029] The bottom surfaces of the limiting plate 53 and the pressure bar block 51 are both provided with pressure bar grooves 55, which contact the surface of the rod. The bottom surface of the pressure head block 52 is provided with a pressure head groove 56, which contacts the surface of the head.

[0030] The pressure bar groove 55 and the pressure head groove 56 are arc-shaped surfaces that match the rod and head. The entire fastening block contacts and presses the extrusion pin with an arc-shaped surface structure, improving the connection stability.

[0031] The fastening block 5 is provided with a locking groove 54, which passes through the limiting plate 53, the pressure rod block 51, and the pressure head block 52; the connecting block 1 is provided with a threaded groove 12, and the fastening block 5 is locked in the mounting groove 11 by a long screw 6.

[0032] This invention utilizes a long screw to fix the fastening block in the mounting groove, preventing the fastening block from detaching from the connecting block during use, thus improving stability and facilitating disassembly and replacement.

[0033] The outer surface of the fastening block 5 is flush with the outer surface of the connecting block 1 to prevent interference with other components.

[0034] like Figure 1 and Figure 2 As shown, the connecting block 1 is provided with a T-slot 13, and the connector 4 is provided with a T-block 41, which is engaged in the T-slot 13. The connector 4 and the connecting block are connected by a T-slot, using an interference fit. The connector is connected to a hydraulic cylinder to achieve synchronous extrusion movement of the two extrusion pins.

[0035] The extrusion pins include a first extrusion pin 2 and a second extrusion pin 3. The first extrusion pin 2 includes a first rod portion and a first head 21, and the first rod portion is fitted with a first guide sleeve 22 that is axially slidably connected. The second extrusion pin 3 includes a second rod portion and a second head 31, and the second rod portion is fitted with a second guide sleeve 32 that is axially slidably connected. The two guide sleeves are respectively fixed in the mold frame within the entire mold equipment to achieve a guiding function.

[0036] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall fall within the scope of the technical solution of the present utility model.

Claims

1. A double-extrusion pin structure, characterized in that: Includes a connecting block (1), with mounting grooves (11) provided on both opposite sides of the connecting block (1), each mounting groove (11) having a pressing pin installed thereon, the mounting groove (11) being fitted with a fastening block (5), and the connecting block (1) also being connected to a connector (4) for connecting a hydraulic cylinder. The mounting groove (11) includes a rod groove (110) and a head groove (111) that are interconnected. The extrusion pin includes a rod and a head, with the rod placed in the rod groove (110) and the head placed in the head groove (111). The depth of the rod groove (110) is greater than the outer diameter of the rod, and the depth of the head groove (111) is greater than the outer diameter of the head. The fastening block (5) includes a limiting plate (53), a pressure rod block (51), and a pressure head block (52) that are fixedly connected in sequence. The pressure rod block (51) is placed in the rod groove (110) to press the rod. The pressure head block (52) is placed in the head groove (111) to press the head. The limiting plate (53) is placed on the end face of the connecting block (1). The bottom surfaces of the limiting plate (53) and the pressure bar block (51) are provided with pressure bar grooves (55), the pressure bar grooves (55) contact the surface of the rod, and the bottom surface of the pressure head block (52) is provided with pressure head grooves (56), the pressure head grooves (56) contact the surface of the head; The fastening block (5) is provided with a locking groove (54), which passes through the limiting plate (53), the pressure rod block (51), and the pressure head block (52); the connecting block (1) is provided with a threaded groove (12), and the fastening block (5) is locked in the mounting groove (11) by a long screw (6).

2. The double extrusion pin structure according to claim 1, characterized in that: The outer surface of the fastening block (5) is flush with the outer surface of the connecting block (1).

3. The double extrusion pin structure according to claim 1, characterized in that: The connecting block (1) is provided with a T-slot (13), and the connector (4) is provided with a T-block (41), and the T-block (41) is locked in the T-slot (13).

4. The double extrusion pin structure according to claim 1, characterized in that: The extrusion pin includes a first extrusion pin (2) and a second extrusion pin (3). The first extrusion pin (2) includes a first rod and a first head (21). The first rod is fitted with a first guide sleeve (22) that is axially slidably connected. The second extrusion pin (3) includes a second rod and a second head (31). The second rod is fitted with a second guide sleeve (32) that is axially slidably connected.

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