Aluminum alloy high-density die-casting forming die

Abstract

The utility model discloses an aluminum alloy high-density die-casting forming die which comprises a fixed die body and further comprises a movable die body and an exhaust mechanism, the movable die body is arranged on one side of the fixed die body in a matched mode, the exhaust mechanism is arranged on the top of the fixed die body, and the exhaust mechanism comprises a fixing frame, a sleeve, an exhaust pipe, a collecting pipe, a hydraulic cylinder, an inserting rod, an end base, a cavity, a through hole and an exhaust hole. A fixing frame is arranged at the top of the fixed die, a sleeve communicated with the interior of the fixed die is embedded in the top end of the interior of the fixed die, and in the die casting process, molten liquid carries air involved in the molten liquid to enter a cavity through a through hole, flows upwards under the pressure effect and is discharged into a discharging pipe from a discharging hole. The inserting rod is lifted at the power end of the hydraulic cylinder at the rear section of die casting so that the bottom of the end base can be aligned with the bottom of the sleeve, it can be ensured that the interior of the die cavity can be formed completely, air in the die cavity can be exhausted in the die casting process, bubbles and air holes are reduced, and the product density is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of die-casting molds, in particular to a high-density die-casting mold for aluminum alloys. Background Art

[0002] Die casting is a metal casting process characterized by applying high pressure to the molten metal in the mold cavity. The mold is usually made of a higher strength alloy. In the processing of aluminum alloy products, the die casting production process is often used. The production process realizes the production of aluminum alloy products through the cooperation of the die casting machine and the die casting mold.

[0003] The existing aluminum alloy die-casting molds have the following disadvantages when used: During the die-casting production process of aluminum alloy melt, the aluminum alloy liquid fills the mold cavity at high speed and high pressure during die-casting, which inevitably causes the aluminum alloy liquid to entrain gas in the mold cavity, thereby forming porosity defects, reducing the density of the casting and affecting the quality of the finished product. For this reason, we propose an aluminum alloy high-density die-casting mold. Utility Model Content

[0004] The main purpose of the utility model is to provide a high-density die-casting mold for aluminum alloy. By arranging an exhaust mechanism on the top of the top mold, the gas content in the molten liquid inside the mold can be reduced during the die-casting process, the density of the finished product can be improved, and the problems in the background technology can be effectively solved.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A high-density die-casting mold for aluminum alloy includes a fixed mold, a movable mold and an exhaust mechanism. The movable mold is provided on one side of the fixed mold and the exhaust mechanism is provided on the top of the fixed mold. The exhaust mechanism includes a fixed frame, a sleeve, a discharge pipe, a manifold, a hydraulic cylinder, an insert rod, an end seat, a cavity, a through hole and a discharge hole. A fixed frame is provided on the top of the fixed mold and a sleeve connected to the interior of the fixed mold is embedded in the top end of the fixed mold. The sleeve is located at one end of the top of the fixed mold and a discharge pipe is installed, and a manifold is provided between the ends of the discharge pipe. A hydraulic cylinder is installed on the top of the fixed frame and a insert rod inserted into the interior of the sleeve is installed at the power end of the hydraulic cylinder. The bottom end of the insert rod is integrally formed with an end seat and a cavity is provided at the middle section of the insert rod. Through holes connected to the interior of the cavity are provided on both sides of the surface of the insert rod, and discharge holes are provided on the surface of the insert rod corresponding to the discharge pipe.

[0007] Furthermore, it also includes auxiliary mechanisms. Auxiliary mechanisms are provided inside the discharge pipe, manifold and insertion rod. The auxiliary mechanisms include electric heating tape A, electric heating tape B and power supply lines. The electric heating tape A is embedded in the insertion rod, and the electric heating tape B is embedded in the discharge pipe and manifold. The power supply ends of the electric heating tape A and the electric heating tape B are provided with power supply lines. During the die-casting production process, the power supply line is connected to the power supply, the electric heating tape A and the electric heating tape B heat up, and the inside of the insertion rod, discharge pipe and manifold is heated to increase the internal temperature, thereby avoiding solidification problems during the discharge of the molten liquid.

[0008] Furthermore, a mold cavity is opened inside the fixed mold and the bottom of the sleeve is connected to the inside of the mold cavity. A punch is installed on the surface of the movable mold to be inserted into the mold cavity. When the mold is closed, the punch on the surface of the movable mold is inserted into the mold cavity, and die casting production is carried out after the mold is closed.

[0009] Furthermore, limit pins are installed at the four corners of the movable mold surface facing the fixed mold, and limit holes corresponding to the positions of the limit pins are opened at the four corners of the fixed mold surface facing the movable mold; during the mold closing process, the limit pins and the limit holes are used to cooperate to ensure the precise closing of the fixed mold and the movable mold.

[0010] Furthermore, a through hole is opened on one side of the interior of the fixing frame, and the power supply line passes through the interior of the through hole; the through hole structure facilitates the power supply line to pass through the fixing frame and connect to the external power supply.

[0011] Compared with the prior art, the present invention has the following beneficial effects: the fixed mold and the movable mold are installed at appropriate positions inside the die-casting machine for die-casting production of aluminum alloy workpieces. When the fixed mold and the movable mold are closed, the hydraulic cylinder runs, and its power end drives the bottom of the insert rod to be inserted into the mold cavity. As the external molten liquid is continuously injected under high pressure, part of the molten liquid will enter the cavity through the through hole with the air entrained in the molten liquid, and under the action of pressure, the upstream is discharged from the discharge hole position into the inside of the discharge pipe, and finally discharged back to the supply end of the molten liquid by the manifold. In the latter part of the die-casting, the power end of the hydraulic cylinder lifts the insert rod so that the bottom of the end seat is aligned with the bottom of the sleeve, which can ensure that the internal molding of the mold cavity is complete, realizes the air discharge treatment inside the mold cavity during the die-casting process, reduces bubbles and pores, and improves the density of the product; during the die-casting production process, the power line is connected to the power supply, the electric heating belt A and the electric heating belt B heat up, and heats the insert rod, the discharge pipe and the inside of the manifold to increase the internal temperature, thereby avoiding solidification problems during the discharge of the molten liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the overall structure of a high-density die-casting mold for aluminum alloys according to the present invention.

[0013] Figure 2This is a schematic diagram of the rod installation structure of an aluminum alloy high-density die-casting mold of the utility model.

[0014] Figure 3 This is a schematic diagram of the internal structure of an insert rod of an aluminum alloy high-density die-casting mold of the present utility model.

[0015] In the figure: 1. Fixed mold; 2. Moving mold; 3. Exhaust mechanism; 301. Punch; 302. Mold cavity; 303. Limit pin; 304. Limit hole; 305. Fixing frame; 306. Sleeve; 307. Discharge pipe; 308. Manifold; 309. Hydraulic cylinder; 310. Insert rod; 311. End seat; 312. Cavity; 313. Through hole; 314. Discharge hole; 4. Auxiliary mechanism; 401. Electric belt A; 402. Electric belt B; 403. Power supply line; 404. Threading hole. DETAILED DESCRIPTION

[0016] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0017] like Figure 1-3 As shown, a high-density die-casting mold for aluminum alloy includes a fixed mold 1, a movable mold 2 and an exhaust mechanism 3. The movable mold 2 is provided on one side of the fixed mold 1 and the exhaust mechanism 3 is provided on the top of the fixed mold 1. The exhaust mechanism 3 includes a fixed frame 305, a sleeve 306, a discharge pipe 307, a manifold 308, a hydraulic cylinder 309, a plug 310, an end seat 311, a cavity 312, a through hole 313 and a discharge hole 314. The fixed mold 1 is provided with a fixed frame 305 on the top and a sleeve 306 is embedded in the top of the fixed mold 1 and is connected to the inside of the fixed mold 1. The sleeve 3 06 A discharge pipe 307 is installed at one end of the top of the fixed mold 1 and a manifold 308 is provided between the ends of the discharge pipe 307, a hydraulic cylinder 309 is installed on the top of the fixed frame 305 and an insert rod 310 inserted into the inside of the sleeve 306 is installed at the power end of the hydraulic cylinder 309, an end seat 311 is integrally formed at the bottom end of the insert rod 310 and a cavity 312 is provided at the middle position of the insert rod 310, through holes 313 connected to the inside of the cavity 312 are provided on both sides of the surface of the insert rod 310 and a discharge hole 314 is provided on the surface of the insert rod 310 at a position corresponding to the discharge pipe 307.

[0018] Among them, it also includes an auxiliary mechanism 4, the auxiliary mechanism 4 is set inside the discharge pipe 307, the manifold 308 and the insertion rod 310, the auxiliary mechanism 4 includes an electric heating tape A401, an electric heating tape B402 and a power supply line 403, the electric heating tape A401 is embedded in the insertion rod 310, the electric heating tape B402 is embedded in the discharge pipe 307 and the manifold 308, and the power supply ends of the electric heating tape A401 and the electric heating tape B402 are provided with a power supply line 403; during the die-casting production process, the power supply line 403 is connected to the power supply, the electric heating tape A401 and the electric heating tape B402 are heated, and the inside of the insertion rod 310, the discharge pipe 307 and the manifold 308 are heated to increase the internal temperature, thereby avoiding solidification problems during the discharge of the molten liquid.

[0019] Among them, a mold cavity 302 is opened inside the fixed mold 1 and the bottom of the sleeve 306 is connected to the inside of the mold cavity 302, and a punch 301 is installed on the surface of the movable mold 2 to be inserted into the mold cavity 302. Limit pins 303 are installed at the four corners of the surface of the movable mold 2 facing the fixed mold 1, and limiting holes 304 corresponding to the positions of the limit pins 303 are opened at the four corners of the surface of the fixed mold 1 facing the movable mold 2; when the mold is closed, the punch 301 on the surface of the movable mold 2 is inserted into the mold cavity 302, and die-casting production is carried out after the mold closing is completed. During the mold closing process, the limit pins 303 and the limit holes 304 are used to ensure the precise closing of the fixed mold 1 and the movable mold 2.

[0020] A through hole 313 is formed on one side of the fixing frame 305 , and the power supply line 403 passes through the through hole 313 . The through hole 313 facilitates the power supply line 403 to pass through the fixing frame 305 and connect to an external power source.

[0021] It should be noted that the present invention is a high-density die-casting mold for aluminum alloys. When working, the fixed mold 1 and the movable mold 2 are installed at appropriate positions inside the die-casting machine to perform die-casting production of aluminum alloy workpieces. When the fixed mold 1 and the movable mold 2 are closed, the hydraulic cylinder 309 is operated, and its power end drives the bottom of the insertion rod 310 to be inserted into the mold cavity 302. As the external molten liquid is continuously injected under high pressure, part of the molten liquid will enter the cavity 312 through the through hole 313 with the air entrained in the molten liquid, and under the action of pressure, the upstream is discharged from the discharge hole 314 into the discharge pipe 307, and finally discharged by the manifold 308. The bus returns to the supply end of the molten liquid, and the power end of the hydraulic cylinder 309 in the rear section of the die-casting section lifts the plug rod 310 so that the bottom of the end seat 311 is aligned with the bottom of the sleeve 306, thereby ensuring that the interior of the mold cavity 302 is completely formed, and the air inside the mold cavity 302 is discharged during the die-casting process, thereby reducing bubbles and pores and improving the density of the product; during the die-casting production process, the power supply line 403 is connected to the power supply, the electric heating belt A401 and the electric heating belt B402 are heated, and the plug rod 310, the discharge pipe 307 and the busbar 308 are heated to increase the internal temperature, thereby avoiding solidification problems during the discharge of the molten liquid.

[0022] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A high-density die-casting mold for aluminum alloy, comprising a fixed mold (1), characterized in that: The invention also includes a movable mold (2) and an exhaust mechanism (3). The movable mold (2) is matched with one side of the fixed mold (1) and the exhaust mechanism (3) is provided on the top of the fixed mold (1). The exhaust mechanism (3) includes a fixed frame (305), a sleeve (306), a discharge pipe (307), a manifold (308), a hydraulic cylinder (309), an insert rod (310), an end seat (311), a cavity (312), a through hole (313) and an exhaust hole (314). The fixed mold (1) is provided with a fixed frame (305) on the top and a sleeve (306) is embedded in the top end of the fixed mold (1) and is connected to the inside of the fixed mold (1). The sleeve (306) is located at the fixed mold (1). A discharge pipe (307) is installed at one end of the top, and a manifold (308) is provided between the ends of the discharge pipe (307). A hydraulic cylinder (309) is installed at the top of the fixing frame (305), and a plug rod (310) inserted into the interior of the sleeve (306) is installed at the power end of the hydraulic cylinder (309). An end seat (311) is integrally formed at the bottom end of the plug rod (310), and a cavity (312) is provided at the middle position of the plug rod (310). Through holes (313) communicating with the interior of the cavity (312) are provided on both sides of the surface of the plug rod (310), and a discharge hole (314) is provided on the surface of the plug rod (310) at a position corresponding to the discharge pipe (307).

2. The high-density die-casting mold for aluminum alloy according to claim 1, characterized in that: The invention also includes an auxiliary mechanism (4), wherein the auxiliary mechanism (4) is provided inside the discharge pipe (307), the confluence pipe (308) and the insertion rod (310), and the auxiliary mechanism (4) includes an electric heating tape A (401), an electric heating tape B (402) and a power supply line (403). The electric heating tape A (401) is embedded inside the insertion rod (310), and the electric heating tape B (402) is embedded inside the discharge pipe (307) and the confluence pipe (308). The power supply ends of the electric heating tape A (401) and the electric heating tape B (402) are both provided with a power supply line (403).

3. The high-density die-casting mold for aluminum alloy according to claim 1, characterized in that: A mold cavity (302) is provided inside the fixed mold (1), and the bottom of the sleeve (306) is connected to the inside of the mold cavity (302). A convex mold (301) inserted into the mold cavity (302) is installed on the surface of the movable mold (2).

4. The high-density die-casting mold for aluminum alloy according to claim 1, characterized in that: Limiting pins (303) are installed at the four corners of the surface of the movable mold (2) facing the fixed mold (1), and limiting holes (304) corresponding to the positions of the limiting pins (303) are opened at the four corners of the surface of the fixed mold (1) facing the movable mold (2).

5. The high-density die-casting mold for aluminum alloy according to claim 2, characterized in that: A through hole (313) is provided on one side of the interior of the fixing frame (305), and the power supply line (403) passes through the interior of the through hole (313).

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