Hot extrusion die capable of efficiently and uniformly controlling flow

Abstract

The utility model discloses an efficient and uniform flow control hot extrusion die, and belongs to the technical field of aluminum extrusion dies. The mold comprises a mold body, and the mold body comprises a mold cavity penetrating through the middle of the mold body; the working area comprises a shunting hole, a shunting bridge and a mold core; and the false bridges are arranged on the two sides of the mold core. According to the hot extrusion die capable of efficiently and uniformly controlling the flow, a plurality of false bridges are introduced to control the flow of a thick-wall part, and a fluid is dispersed into a plurality of strands of fine aluminum flows, so that the non-uniform phenomenon caused by too high flow speed is avoided, the filling uniformity of the thick-wall part is effectively improved, the defects of air holes, cracks, dimensional deviation and the like are reduced, and the production efficiency is improved. In addition, according to the design of the false bridge, the purpose of accurately controlling the flow at the wall thickness position can be achieved by adjusting the shape and size of the false bridge and the radian of the drainage curved surface, feeding is sufficient, the false appearance is not prone to occurring, the problems that the speed is difficult to control and the size is difficult to control can be solved, and production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to aluminium extrusion die technical field, especially a kind of hot extrusion die of high efficiency uniform flow control. BACKGROUND

[0002] In aluminium hot extrusion processing industry, the design of die is crucial to the quality of final product, in hot extrusion process, the flow velocity and flow distribution of fluid have important influence on the filling of material, forming and physical property of final product, thick wall position often leads to uneven phenomenon of material in flow process due to its larger section and higher flow resistance, and then causes product defects, such as blowhole, crack and size deviation etc.

[0003] For the problem of difficult control of flow in thick wall position, there are two kinds of traditional design ideas, one is to use water block to slow down the flow of fluid in thick wall position, but for the position with large thick-thin ratio, the control effect is poor, the flow is fast in thick wall, and the purpose of slowing down the flow rate in thick wall cannot be achieved, two is to set shunt hole control, but the size and layout of shunt hole have great influence on flow, if not properly designed, it may lead to discharge illusion, cause insufficient supply, affect the uniformity and size accuracy of product, and the size of shunt hole is also difficult to accurately control, which is easy to cause quality fluctuation of finished product. Since the existing design method still has significant deficiencies in flow control in thick wall position, there is an urgent need for a new die design structure to realize uniform flow control, therefore, we propose a kind of hot extrusion die of high efficiency uniform flow control. SUMMARY

[0004] The utility model aims at providing a kind of hot extrusion die of high efficiency uniform flow control to solve the deficiency of traditional die design in flow control in thick wall position, improve the overall effect and product quality of aluminium hot extrusion processing.

[0005] To solve the above technical problems, the utility model provides a kind of hot extrusion die of high efficiency uniform flow control, including die body, the die body includes the die cavity through in the middle part;

[0006] Working area, the working area includes shunt hole, shunt bridge being arranged between the shunt hole, and die core being arranged in the side of the shunt bridge;

[0007] False bridge, the false bridge is arranged in the two sides of die core.

[0008] Preferably, the shunt hole is symmetrical up and down, and each side includes four center holes in rectangular, and two sides are progressive holes formed by being closed with die cavity, a total of six.

[0009] Preferably, the area of the progressive hole gradually decreases from the feeding port to the discharge port.

[0010] Preferably, the flow distribution bridge comprises a main bridge and an auxiliary bridge, the main bridge is used for separating the flow distribution hole, and the auxiliary bridge is used for connecting the mold core.

[0011] Preferably, the mold cores are evenly arranged in four working areas, and adjacent working areas are connected through auxiliary bridges.

[0012] The mold core is provided with a plurality of flow channels for guiding fluid.

[0013] Preferably, the false bridge is connected with the mold core through the auxiliary bridge and is arranged on the upper and lower sides of the auxiliary bridge.

[0014] Preferably, the false bridge is connected with the inner wall of the gradual hole through a streamline drainage curve.

[0015] Compared with the prior art, the design scheme of the hot extrusion die with efficient and uniform flow control of the utility model introduces a plurality of false bridges to control the flow of thick wall parts, and has the following beneficial effects:

[0016] 1. By dispersing the fluid into a plurality of small aluminum streams, the uneven phenomenon caused by too fast flow rate is avoided, thereby effectively improving the filling uniformity of the thick wall part and reducing the occurrence of defects such as pores, cracks and size deviation;

[0017] 2. Compared with the traditional water block and flow distribution hole design, the false bridge design can precisely control the flow at the wall thickness by adjusting the shape, size and arc of the drainage curve of the false bridge, not only sufficient feeding, not easy to appear false, but also solve the problem of difficult control of fast and slow, difficult control of size, improve the production efficiency, reduce the customer mold cost, create higher value for customers. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is the overall structure diagram of the hot extrusion die with efficient and uniform flow control provided by the utility model;

[0019] Figure 2 is the hot extrusion die with efficient and uniform flow control provided by the utility model Figure 1 is a partial enlarged view of A in the hot extrusion die with efficient and uniform flow control;

[0020] Figure 3 is the sectional view of the hot extrusion die with efficient and uniform flow control provided by the utility model;

[0021] Figure 4 is the structure schematic view of the working area in the hot extrusion die with efficient and uniform flow control provided by the utility model;

[0022] In the figure: 1, die body; 2, working area; 3, false bridge; 101, die cavity; 201, shunt hole; 201a, center hole; 201b, gradual hole; 202, shunt bridge; 202a, main bridge; 202b, auxiliary bridge; 203, die core; 203a, flow channel; 301, drainage curved surface. DETAILED DESCRIPTION

[0023] The utility model makes further detailed description in combination with the drawings and specific embodiments. The advantages and features of the utility model will be more apparent according to the following description and claims. It should be noted that the drawings all adopt very simplified form and all use non-precise proportion, only to facilitate, clearly assist the purpose of description of the embodiment of the utility model.

[0024] In the description of the utility model, it needs to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" and the like can explicitly or implicitly include one or more features. In the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0025] In the description of the utility model, it needs to be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected, it can be mechanical connection, or electrical connection, it can be directly connected, or indirectly connected through intermediate medium, it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood through specific circumstances. EMBODIMENT

[0026] The utility model provides a kind of high-efficiency uniform flow control's hot extrusion die, please refer to Figures 1 to 4 , including die body 1, the die body 1 includes die cavity 101 through in middle part;Working area 2, the working area 2 includes shunt hole 201, is arranged in the shunt hole 201 between shunt bridge 202, and die core 203 is arranged in the side of shunt bridge 202;False bridge 3, the false bridge 3 is arranged in die core 203 both sides.

[0027] The flow distribution hole 201 is symmetrical up and down, each side including four central rectangular holes 201a, and two sides are progressive holes 201b formed by closing the mold cavity 101, a total of six; the hole area of the progressive hole 201b gradually decreases from the inlet to the outlet; the flow distribution bridge 202 includes a main bridge 202a for separating the flow distribution hole 201 and an auxiliary bridge 202b for connecting the mold core 203; the mold core 203 is uniformly arranged in four working areas, and adjacent working areas are connected by the auxiliary bridge 202b; a plurality of flow channels 203a are formed on the mold core 203 for guiding fluid; the dummy bridge 3 is connected to the mold core 203 through the auxiliary bridge 202b and is formed on the upper and lower sides of the auxiliary bridge 202b; the dummy bridge 3 is connected to the inner wall of the progressive hole 201b through a streamlined drainage curve 301.

[0028] It should be noted that the mold body 1 is made of H13 mold steel, and the specific material is 4Cr5MoSiV1. The mold cavity 101 is provided inside for accommodating the material to be extruded. The working area 2 is a collection of main working structures of the mold. The flow distribution hole 201 is used for material distribution. The flow distribution bridge 202 is used for connecting and supporting the flow distribution hole 201. The flow distribution bridge 202 on the discharge side is fixedly connected with the mold core 203. The dummy bridge 3 is also fixedly connected with the flow distribution bridge 202 and is symmetrically distributed on both sides of the mold core 203.

[0029] Preferably, the flow distribution hole 201 has a total of 12 holes, of which 8 are rectangular central holes 201a, and the four corners are progressive holes 201b. The shape of the progressive hole 201b is irregular, and it is essentially the shape formed by the outermost flow distribution bridge 202 and the mold cavity 101. The area of the progressive hole 201b gradually decreases from the inlet to the outlet. Essentially, the shape of the mold cavity 101 is large at the inlet and small at the outlet. The inlet and outlet of the central hole 201a have the same area, and the rectangular shape is the general shape. The four corners of the rectangle are provided with curved fillets.

[0030] Preferably, the mold core 203 is uniformly arranged in four working areas. The flow distribution bridge 202 includes a main bridge 202a for dividing the flow distribution hole 201 to ensure uniform and stable flow, and an auxiliary bridge 202b for connecting adjacent working areas of the mold core 203 and connecting the mold core 203 and the dummy bridge 3 to ensure stable connection between the mold core 203 and the dummy bridge 3, as shown in Figure 4 The mold core 203 is provided with a plurality of inclined flow channels 203a for guiding fluid and forming.

[0031] Preferably, as shown in Figure 2As shown, the false bridge 3 is arranged on both sides of the auxiliary bridge 202b, and the false bridge 3 is a paddle-shaped object with a cross section shape of wide on both sides and thin in the middle, the cross section of the middle part is gradually tapered to form an elongated area with a width of about 1 / 3 of the width of both ends, and the area is fixedly connected with the auxiliary bridge 202b. Through the design of the false bridge 3, the false bridge 3 is connected with the inner wall of the gradual hole 201b through the streamlined flow guide curve 301, further optimizing the flow path of the material, reducing the flow resistance, and can achieve the purpose of accurately controlling the flow at the thick wall by adjusting the shape, size and arc of the flow guide curve of the false bridge 3. Not only is the feeding sufficient and not easy to appear false, but also solves the problems of difficult control of speed and size, improves the production efficiency, reduces the mold cost of customers, and creates higher value for customers.

[0032] In summary, the design scheme of the high-efficiency uniform flow control hot extrusion die of the utility model introduces multiple false bridges to control the flow at the thick wall part, disperses the fluid into multiple small aluminum flows, avoids the uneven phenomenon caused by too fast flow rate, thereby effectively improves the filling uniformity of the thick wall part, reduces the occurrence of defects such as pores, cracks and size deviation, and in addition, compared with the traditional water blocking block and flow dividing hole design, the false bridge design can more accurately control the flow at the thick wall, ensures that the flow rate can be effectively regulated under the premise of meeting sufficient feeding, thereby improves the size precision of the product.

[0033] The above description is only a description of the preferred embodiment of the utility model, and does not limit the scope of the utility model, and any change and modification of the above disclosure by the ordinary skilled in the art belongs to the protection scope of the claims.

Claims

1. A hot extrusion die for efficient and uniform flow control, characterized by, Comprising, a mold body (1) comprising a mold cavity (101) through the middle part thereof; a working area (2) comprising shunt holes (201), shunt bridges (202) arranged between the shunt holes (201), and mold cores (203) arranged on one side of the shunt bridges (202); false bridges (3) arranged on both sides of the mold cores (203).

2. A hot extrusion die for efficient and uniform flow control as claimed in claim 1, wherein, The shunt holes (201) are symmetrical up and down, each side comprising four central holes (201a) in a rectangular shape, and two sides being progressive holes (201b) closed with the mold cavity (101).

3. A hot extrusion die for efficient and uniform flow control as claimed in claim 2, wherein The progressive holes (201b) gradually decrease in area from the feeding port to the discharging port.

4. A hot extrusion die for efficient and uniform flow control as claimed in claim 3 wherein, The shunt bridges (202) comprise main bridges (202a) for separating the shunt holes (201) and auxiliary bridges (202b) for connecting the mold cores (203).

5. A high efficiency uniform flow controlled hot extrusion die as claimed in claim 1 wherein, The mold cores (203) are evenly arranged in four working areas, and adjacent working areas are connected by auxiliary bridges (202b). The mold cores (203) are provided with multiple flow channels (203a) for guiding fluid.

6. A hot extrusion die for efficient and uniform flow control as claimed in claim 5 wherein, The false bridges (3) are connected with the mold cores (203) through the auxiliary bridges (202b) and are arranged on the upper and lower sides of the auxiliary bridges (202b).

7. A high efficiency uniform flow controlled hot extrusion die as claimed in claim 6 wherein, The false bridges (3) are connected with the inner walls of the progressive holes (201b) through the streamlined drainage curved surfaces (301).

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