Hot extrusion die for cantilever profile

Abstract

The utility model discloses a hot extrusion die for a cantilever profile, and belongs to the technical field of aluminum extrusion dies. The mold comprises an upper mold body, the upper mold body comprises a plurality of flow dividing holes, a flow dividing bridge and a mold core, and a first inclined splicing opening is formed in the surface of the mold core; and the lower die comprises a welding chamber, a flow choking block, a second inclined splicing opening and a cavity. According to the hot extrusion die for the cantilever profile, a traditional flat die design scheme is abandoned, inclined splicing openings are designed in the two ends of the upper die and the lower die, the upper die and lower die combined divergent die design is adopted, the inclined splicing openings are combined and matched, molten aluminum is prevented from leaking out of the splicing openings, the cantilever multiple of the die is reduced to below 3 times from original 8-10 times by adopting a splicing opening die scheme, and the production efficiency is improved. The length of the cantilever is shortened, the supporting strength of the lower die is improved, the actual strength of the cantilever of the die is remarkably enhanced, the pressure applied to the die can be effectively dispersed, and the stability and durability of the die in a high-temperature and high-pressure environment are improved.

Description

Technical Field

[0001] This utility model relates to the field of aluminum extrusion die technology, and in particular to a hot extrusion die for cantilever profiles. Background Technology

[0002] In the aluminum processing industry, hot aluminum extrusion is an important forming process, widely used in the production of various aluminum alloy profiles due to its high efficiency and economy. During aluminum extrusion, the die is subjected to enormous pressure and heat. Therefore, the strength and stability of the cantilever section must be considered during the design. The cantilever ratio refers to the ratio of the cantilever area of ​​the profile cross-section to the cantilever opening area in the die. An excessively large cantilever ratio can lead to instability of the die during operation, making it prone to deformation or damage, thus affecting the quality of the extruded products. Therefore, a reasonable design of the cantilever ratio is one of the important factors in ensuring die performance.

[0003] Currently, dies used in high-cantilever profile sections often experience problems such as die slippage, wall deviation, and breakage under high-temperature and high-pressure extrusion processes. These problems not only reduce the service life of the dies but also cause instability in the production process, thereby affecting the output of the dies and the overall production efficiency of the extrusion profile plant. In addition, during the die processing, excessively deep empty cuts after cantilever discharge make it difficult to guarantee the accuracy of the dies, increasing the processing difficulty and time.

[0004] Therefore, it is urgent to develop a mold structure with reasonable cantilever ratio, low processing difficulty and high processing efficiency. To this end, we propose a hot extrusion mold for cantilever profiles. Utility Model Content

[0005] The purpose of this utility model is to provide a hot extrusion die for cantilever profiles, so as to solve the problems of low extrusion efficiency and poor quality caused by phenomena such as stepping, wall deviation and breakage that occur during the use of existing dies for cantilever profile cross-sections.

[0006] To solve the above technical problems, this utility model provides a hot extrusion die for cantilever profiles, including an upper die, the upper die including a plurality of flow diversion holes, a flow diversion bridge disposed on one side of the flow diversion holes, and a die core disposed on the other side of the upper die, the die core having a first oblique splice opening on its surface;

[0007] The lower mold includes a welding chamber, a flow-blocking block disposed in the welding chamber, a second oblique joint disposed on one side of the flow-blocking block, and a cavity disposed on one side of the second oblique joint, the cavity being connected to the welding chamber.

[0008] Preferably, the mold core is inserted into the cavity assembly mold, and the first oblique joint and the second oblique joint are spliced ​​and fitted together.

[0009] Preferably, the tilt angle of both the first and second oblique joints is set to 20 degrees.

[0010] Preferably, the central part of the diversion bridge is a pentagon, with each corner of the pentagon extending outward to form five extending sides, which surround to form diversion holes, and the bridge position of the feed surface of the diversion bridge is chamfered.

[0011] Preferably, the flow-blocking block is a rectangular ring structure, wherein the rectangular side facing the second oblique splice is omitted, forming an open rectangular ring.

[0012] Preferably, the lower mold further includes a discharge port located at the other end of the cavity. The discharge port has the same shape as the cavity, but its size is larger than that of the cavity, forming a relatively spacious discharge channel.

[0013] Preferably, the upper mold and the lower mold are fastened together by fasteners to form a mold body, and the mold body is generally set in a disc shape.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: The hot extrusion die for cantilever profiles of this utility model abandons the traditional flat die design. By designing oblique joints at both ends of the upper and lower dies, it is changed to a combined upper and lower die flow-dividing die design. The oblique joints are combined and matched to prevent aluminum liquid from leaking out from the joint. By adopting the joint die design, the cantilever ratio of the die is reduced from the original 8-10 times to less than 3 times, which shortens the length of the cantilever, increases the support strength of the lower die, and significantly enhances the actual strength of the die cantilever. It can effectively distribute the pressure applied to the die, reduce the deformation and damage of the die, and fundamentally improve the stability and durability of the die under high temperature and high pressure environment. Attached Figure Description

[0015] Figure 1 This is an exploded view of a hot extrusion die for cantilever profiles provided by this utility model;

[0016] Figure 2 This is an exploded view from another angle of a hot extrusion die for cantilever profiles provided by this utility model;

[0017] Figure 3 This is a cross-sectional view of a hot extrusion die for cantilever profiles provided by this utility model;

[0018] Figure 4 This is a schematic diagram comparing the cantilever ratio of a hot extrusion die for cantilever profiles provided by this utility model;

[0019] In the diagram: 1. Upper mold; 2. Lower mold; 101. Diverter hole; 102. Diverter bridge; 103. Mold core; 104. First oblique joint; 201. Welding chamber; 202. Flow barrier; 203. Second oblique joint; 204. Cavity; 205. Discharge port. Detailed Implementation

[0020] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become clearer from the following description and claims. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the present invention.

[0021] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Example

[0023] This utility model provides a hot extrusion die for cantilever profiles. Please refer to [link / reference]. Figures 1-4The upper mold 1 includes a plurality of flow diversion holes 101, a flow diversion bridge 102 disposed on one side of the flow diversion holes 101, and a mold core 103 disposed on the other side of the upper mold 1, wherein a first oblique splice opening 104 is provided on the surface of the mold core 103; and a lower mold 2, which includes a welding chamber 201, a flow blocking block 202 disposed in the welding chamber 201, a second oblique splice opening 203 disposed on one side of the flow blocking block 202, and a cavity 204 disposed on one side of the second oblique splice opening 203, wherein the cavity 204 is connected to the welding chamber 201.

[0024] The mold core 103 is inserted into the cavity 204 to form a mold assembly. The first oblique joint 104 and the second oblique joint 203 are spliced ​​and fitted together. The inclination angle of the first oblique joint 104 and the second oblique joint 203 is set to 20 degrees. The central part of the flow divider bridge 102 is a pentagon. Each corner of the pentagon extends outward to form five extended sides. The extended sides surround to form a flow divider hole 101. The bridge position of the flow divider bridge 102 is chamfered. The flow blocking block 202 is a rectangular ring structure. The rectangular side facing the second oblique joint 203 is omitted to form an open rectangular ring. The lower mold 2 also includes a discharge port 205 set at the other end of the cavity 204. The discharge port 205 has the same shape as the cavity 204, but the size of the discharge port 205 is larger than the size of the cavity 204, forming a relatively loose discharge channel. The upper mold 1 and the lower mold 2 are tightly fitted together by fasteners to form a mold body. The mold body is set as a disc.

[0025] It should be noted that a mold cantilever refers to a structure fixed to one side of the mold to support the profile during mold design and manufacturing. The mold cantilever ratio refers to the ratio of the cantilever area of ​​the profile cross-section to the cantilever opening area. If the cantilever ratio is too large, the mold will be unstable during operation, and it will be prone to deformation or damage, affecting the quality of the extruded products. This can lead to phenomena such as profile cantilever slippage, wall deviation, and breakage during use, which seriously affects the production quality of the products.

[0026] Preferably, in this embodiment, the joint mold is formed by combining the first oblique joint 104 and the second oblique joint 203. The joint mold can effectively disperse the pressure applied to the mold, that is, reduce the cantilever area of ​​the profile section. The cantilever opening area of ​​the profile section remains unchanged, the cantilever ratio of the mold is reduced, and the support is more stable.

[0027] Better, such as Figure 4As shown, in this embodiment, before the cantilever was modified, its cantilever ratio was: "S1 / R1²", where S represents the area of ​​the shaded part and R is the cantilever opening size. S1 equals 990.86 square centimeters, and R1 equals 8.69 centimeters. The calculated cantilever ratio is 990.86 / (8.69*8.69)=13.12 times. After the cantilever was modified by adding the splicing mold, S2 equals 115.49 square centimeters, and R2 equals 8.69 centimeters. The calculated cantilever ratio is 115.49 / (8.69*8.69)=1.53 times. The cantilever ratio was greatly reduced, which effectively improved the support strength of the lower mold.

[0028] Preferably, five flow dividers 101 are provided. The molten aluminum is fed along the outside of the flow dividers 101 and enters the welding chamber 201. It flows out from the outlet 205 through the cavity 204 to cool and weld. The flow block 202 is used to limit the flow direction of the molten aluminum in the mold, reduce flow resistance, and prevent the molten aluminum from generating turbulence in the welding chamber 201, thereby improving the quality of the product.

[0029] Preferably, the inclination angles of the first oblique joint 104 and the second oblique joint 203 are both set to 20 degrees, and the two joints complement each other and fit together to form an integral joint mold.

[0030] In summary, this utility model's hot extrusion die for cantilever profiles abandons the traditional flat die design. By designing slanted joints at both ends of the upper and lower dies, it is changed to a combined upper and lower die flow-dividing die design. The slanted joints work together to prevent molten aluminum from leaking out from the joints. By adopting the slanted joint die design, the cantilever ratio of the die is reduced from the original 8-10 times to less than 3 times, shortening the cantilever length, increasing the support strength of the lower die, and significantly enhancing the actual strength of the die cantilever. It can effectively distribute the pressure applied to the die, reduce die deformation and damage, and fundamentally improve the stability and durability of the die under high temperature and high pressure environments.

[0031] The above description is only a description of the preferred embodiment of the present utility model and is not intended to limit the scope of the present utility model in any way. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the protection scope of the claims.

Claims

1. A hot extrusion die for cantilever profiles, characterized in that, include, The upper mold (1) includes multiple flow diversion holes (101), a flow diversion bridge (102) disposed on one side of the flow diversion holes (101), and a mold core (103) disposed on the other side of the upper mold (1). The surface of the mold core (103) is provided with a first oblique splice (104). The lower mold (2) includes a welding chamber (201), a flow-blocking block (202) disposed in the welding chamber (201), a second oblique splice (203) disposed on one side of the flow-blocking block (202), and a cavity (204) disposed on one side of the second oblique splice (203), wherein the cavity (204) is connected to the welding chamber (201).

2. The hot extrusion die for cantilever profiles as described in claim 1, characterized in that, The mold core (103) is inserted into the cavity (204) of the mold assembly, and the first oblique joint (104) and the second oblique joint (203) are spliced ​​and fitted together.

3. A hot extrusion die for cantilever profiles as described in claim 2, characterized in that, The tilt angle of both the first oblique joint (104) and the second oblique joint (203) is set to 20 degrees.

4. A hot extrusion die for cantilever profiles as described in claim 3, characterized in that, The central part of the diversion bridge (102) is a pentagon, and each corner of the pentagon extends outward to form five extended sides. The extended sides surround to form a diversion hole (101). The bridge position of the feed surface of the diversion bridge (102) is chamfered.

5. A hot extrusion die for cantilever profiles as described in claim 4, characterized in that, The flow-blocking block (202) is a rectangular ring structure, wherein the rectangular side facing the second oblique splice (203) is omitted, forming an open rectangular ring.

6. A hot extrusion die for cantilever profiles as described in claim 5, characterized in that, The lower mold (2) also includes a discharge port (205) located at the other end of the cavity (204). The discharge port (205) has the same shape as the cavity (204), but the size of the discharge port (205) is larger than the size of the cavity (204), forming a relatively loose discharge channel.

7. A hot extrusion die for cantilever profiles as described in claim 1, characterized in that, The upper mold (1) and the lower mold (2) are fastened together to form a mold body, and the mold body is set as a disc.

Images