High-speed precision forming die for wear-resistant hard alloy valve

Abstract

The utility model belongs to the technical field of forming molds, and particularly relates to a high-speed precision forming mold for wear-resistant hard alloy valves, which is characterized in that before injection molding, stepping motors on two sides of an injection molding box can be started, motor shafts of the stepping motors drive threaded rods to rotate, and threaded surfaces of the threaded rods are matched with lead screws of threaded grooves on the inner side of a movable metal frame; the two sets of movable metal frames drive the upper pressing mold in the middle to move towards the lower fixed mold and be fully pressed in, then injection molding liquid of the cylindrical wear-resistant hard alloy valve can be introduced into shaping openings of the upper pressing mold and the lower fixed mold from an injection molding liquid connector, and then injection molding is completed; cooling liquid can be injected into the cooling liquid grooves of the upper pressing mold and the lower fixed mold from the cooling liquid connectors through an external pipeline, so that internal injection molding parts are fully cooled, meanwhile, the air holes formed in the top of the upper pressing mold are gradually exposed in air, and high-temperature steam can be discharged outwards from the air holes according to the hot pressing principle; and the steam is prevented from accumulating on the inner walls of the upper pressing mold and the lower fixed mold to cause mold corrosion.

Description

Technical Field

[0001] This utility model belongs to the field of molding die technology, specifically relating to a high-speed precision molding die for wear-resistant hard alloy valve parts. Background Technology

[0002] Die casting molds are tools used to cast metal parts, specifically for completing the die casting process on a specialized die casting and forging machine. The basic die casting process involves molten metal being poured into the mold cavity at low or high speed. The mold has movable cavity surfaces, which are pressurized and forged as the molten metal cools. This process eliminates shrinkage cavities and porosity defects in the blank, and also allows the internal structure of the blank to achieve a forged, fragmented grain structure, significantly improving the overall mechanical properties of the blank.

[0003] Cylindrical valve cores, such as those of slide valves, sleeve valves, and plug valves, are often cylindrical. Hard alloys can enhance wear resistance, and cylindrical hard alloy bushings can be used to protect the inside of the valve body. Existing devices do not have the function of rapid cooling, resulting in a slow natural cooling time during injection molding, low working efficiency, and certain adverse effects on users.

[0004] To address this issue, a high-speed precision forming mold for wear-resistant cemented carbide valve parts was designed. Utility Model Content

[0005] To address the problems mentioned in the background art, this utility model provides a high-speed precision molding die for wear-resistant cemented carbide valve parts. Before injection molding, the stepper motors on both sides of the injection box can be activated. The motor shafts drive the threaded rods to rotate. Through the engagement of the threaded rods with the threaded grooves on the inner side of the movable metal frames, the two sets of movable metal frames drive the upper pressure mold in the middle to move downwards and fully press in the fixed mold. Then, the injection molten metal for the cylindrical wear-resistant cemented carbide valve parts can be introduced from the injection molten metal connector to the forming openings of the upper pressure mold and the lower fixed mold, thereby completing the injection molding.

[0006] After injection molding is completed, to facilitate rapid heat dissipation of the device, an external pipe can be connected to inject coolant into the coolant tanks of the upper mold and the lower mold through the coolant interface, thereby fully dissipating heat from the internal injection molded parts. At the same time, the hydraulic cylinder on the top of the movable metal frame can be activated, and its piston end pulls the push rod. The push rod pulls the outer metal folding frame inward, and the air hole on the top of the upper mold is gradually exposed to the air. According to the principle of hot pressing, high-temperature steam can be discharged outward from the air hole, preventing steam from accumulating on the inner wall of the upper mold and the lower mold and causing mold corrosion.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a high-speed precision molding die for wear-resistant hard alloy valve parts, comprising an injection mold, an upper mold, a lower mold, an injection fluid connector, a coolant interface, and an adjustment part. The upper mold is slidably sleeved on the inner top of the injection mold, the top of the lower mold abuts against the bottom surface of the upper mold, the injection fluid connector is fixedly connected to the outer side of the lower mold, the coolant interface is disposed on one side surface of the lower mold, and the adjustment part is installed on both sides inside the injection mold.

[0008] The injection molding box provides structural support, internally accommodating the upper mold and the lower mold, and ensuring the airtightness of the molding process. The upper mold and the lower mold cooperate to form a cavity, which is vertically pressurized within the injection molding box by sliding sleeves. The lower mold and the upper mold together constitute the molding cavity of the valve. The injection fluid connector is used to inject the hard alloy mixed molten material into the mold cavity under high pressure. The coolant interface is used to accelerate the cooling and solidification of the molded valve. The adjustment part is used to finely adjust the fitting clearance between the upper mold and the lower mold.

[0009] As a preferred embodiment of the high-speed precision forming mold for wear-resistant hard alloy valve parts according to this utility model, the adjusting part includes a movable metal frame, a stepper motor and a threaded rod. The movable metal frame is fixedly connected to the outside of the upper mold, the stepper motor is threadedly connected to the top of the injection box, and the top of the threaded rod is fixedly connected to the motor shaft of the stepper motor through a coupling.

[0010] As a preferred embodiment of the high-speed precision forming mold for wear-resistant hard alloy valve parts of this utility model, the top of the movable metal frame is further provided with a hydraulic cylinder, a push rod and a metal folding frame. The piston end of the hydraulic cylinder is fixedly connected to one end of the push rod, the outer side of the push rod is fixedly connected to the top of the metal folding frame, and the metal folding frame is slidably engaged with the top of the upper mold.

[0011] As a preferred embodiment of the high-speed precision forming mold for wear-resistant hard alloy valve parts of this utility model, the upper mold has several sets of air holes on the inner side of its top.

[0012] As a preferred embodiment of the high-speed precision forming mold for wear-resistant hard alloy valve parts of this utility model, the movable metal frame has a threaded groove that is adapted to the size of the threaded rod.

[0013] As a preferred embodiment of the high-speed precision forming mold for wear-resistant hard alloy valve parts of this utility model, the upper mold and the lower mold are provided with coolant tanks of equal size inside.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. In this utility model, before injection molding, the stepper motors on both sides of the injection box can be started. The motor shaft drives the threaded rod to rotate. Through the cooperation between the threaded surface of the threaded rod and the threaded groove of the inner side of the movable metal frame, the two sets of movable metal frames drive the upper pressure mold in the middle to move downward to the fixed mold and press in fully. Then, the cylindrical wear-resistant hard alloy valve injection liquid can be introduced from the injection liquid joint to the sizing port of the upper pressure mold and the lower fixed mold, thereby completing the injection molding.

[0016] 2. In this utility model, in order to facilitate the rapid heat dissipation of the device, an external pipe can be connected to inject coolant into the coolant tanks of the upper mold and the lower mold from the coolant interface, thereby fully dissipating heat from the internal injection molded parts. At the same time, the hydraulic cylinder at the top of the movable metal frame can be activated, and its piston end pulls the push rod. The push rod pulls the outer metal folding frame inward, and the air hole at the top of the upper mold is gradually exposed to the air. According to the principle of hot pressing, high-temperature steam can be discharged outward from the air hole, preventing steam from accumulating on the inner wall of the upper mold and the lower mold and causing mold corrosion. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a cross-sectional view of the inside of the injection molding box in this utility model;

[0020] Figure 3 This is an illustration of the unfolded effect of the metal folding frame in this utility model;

[0021] Figure 4 This is a side view of the lower fixed mold in this utility model;

[0022] In the picture:

[0023] 1. Injection box; 2. Upper mold; 3. Lower mold; 4. Injection fluid connector; 5. Coolant inlet; 6. Adjustment unit; 61. Movable metal frame; 62. Stepper motor; 63. Threaded rod; 7. Hydraulic cylinder; 8. Push rod; 9. Metal folding frame; 10. Air hole; 11. Threaded groove; 12. Coolant tank; 13. Linear shaft. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] like Figure 1 As shown:

[0026] A high-speed precision molding die for wear-resistant cemented carbide valve parts is provided. The valve core of cylindrical valves, such as slide valves, sleeve valves, and plug valves, is often cylindrical. Cemented carbide can enhance wear resistance, and cylindrical cemented carbide bushings can be used to protect the inside of the valve body. Existing devices do not have the function of rapid cooling, resulting in slow natural cooling time during injection molding, low working efficiency, and certain adverse effects on people's use.

[0027] like Figure 1 , Figure 2 and Figure 3 As shown:

[0028] In an optional embodiment, the system includes an injection box 1, an upper mold 2, a lower mold 3, an injection molten material connector 4, a coolant interface 5, and an adjustment part 6. The upper mold 2 is slidably sleeved on the inner top of the injection box 1, and the top of the lower mold 3 abuts against the bottom surface of the upper mold 2. The injection molten material connector 4 is fixedly connected to the outer side of the lower mold 3. The coolant interface 5 is located on one side surface of the lower mold 3. The adjustment part 6 is installed on both sides inside the injection box 1. The injection box 1 provides structural support, accommodates the upper mold 2 and the lower mold 3, and ensures the airtightness of the molding process. The upper mold 2 and the lower mold 3 cooperate to form a cavity, which is vertically pressurized within the injection box 1 through sliding sleeve. The lower mold 3 and the upper mold 2 together constitute the molding cavity of the valve. The injection molten material connector 4 is used to inject the hard alloy mixed molten material into the mold cavity under high pressure. The coolant interface 5 is used to accelerate the cooling and solidification of the molded valve. The adjustment part 6 is used to finely adjust the fitting gap between the upper mold 2 and the lower mold 3.

[0029] In this implementation scheme: Before injection molding, the stepper motors 62 on both sides of the injection box 1 can be started. The motor shaft drives the threaded rod 63 to rotate. Through the engagement of the threaded surface of the threaded rod 63 with the threaded groove 11 on the inner side of the movable metal frame 61, the two sets of movable metal frames 61 drive the upper pressure mold 2 in the middle to move to the lower fixed mold 3 and press it in fully. Then, the cylindrical wear-resistant hard alloy valve injection liquid can be introduced from the injection liquid connector 4 to the sizing port of the upper pressure mold 2 and the lower fixed mold 3, thereby completing the injection molding.

[0030] Furthermore:

[0031] like Figure 1 and Figure 4 As shown:

[0032] In an optional embodiment: the adjusting unit 6 includes a movable metal frame 61, a stepper motor 62, and a threaded rod 63. The movable metal frame 61 is fixedly connected to the outside of the upper mold 2. The stepper motor 62 is threadedly connected to the top of the injection molding box 1. The top of the threaded rod 63 is fixedly connected to the motor shaft of the stepper motor 62 via a coupling. The top of the movable metal frame 61 is also provided with a hydraulic cylinder 7, a push rod 8, and a metal folding frame 9. The piston end of the hydraulic cylinder 7 is fixedly connected to one end of the push rod 8, and the outside of the push rod 8 is fixedly connected to the top of the metal folding frame 9. The metal folding frame 9 is slidably engaged with the top of the upper mold 2. Several sets of air holes 10 are opened on the inner side of the top of the upper mold 2. A threaded groove 11 adapted to the size of the threaded rod 63 is opened through the interior of the movable metal frame 61. Coolant tanks 12 of equal size are opened inside the upper mold 2 and the lower fixed mold 3.

[0033] In this embodiment: After injection molding is completed, in order to facilitate rapid heat dissipation of the device, an external pipe can be connected to inject coolant from the coolant interface 5 into the coolant tank 12 of the upper mold 2 and the lower mold 3, thereby fully dissipating heat from the internal injection molded parts. At the same time, the hydraulic cylinder 7 on the top of the movable metal frame 61 can be activated, and its piston end pulls the push rod 8. The push rod 8 pulls the outer metal folding frame 9 inward, and the air hole 10 opened on the top of the upper mold 2 is gradually exposed to the air. According to the principle of hot pressing, high-temperature steam can be discharged outward from the air hole 10, preventing steam from accumulating on the inner wall of the upper mold 2 and the lower mold 3 and causing mold corrosion.

[0034] It should be noted that the linear shaft 13 is distributed parallel to both sides of the lower die 3 and connected to the upper die 2, thereby improving the stability of the die casting process.

[0035] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A high speed precision forming die for wear resistant carbide valve parts, characterized by: The injection molding box (1), upper mold (2), lower mold (3), injection fluid connector (4), coolant interface (5), and adjustment part (6) are included. The upper mold (2) is slidably sleeved on the inner top of the injection molding box (1). The top of the lower mold (3) abuts against the bottom surface of the upper mold (2). The injection fluid connector (4) is fixedly connected to the outer side of the lower mold (3). The coolant interface (5) is provided on one side surface of the lower mold (3). The adjustment part (6) is installed on both sides inside the injection molding box (1). The injection box (1) provides structural support, houses the upper mold (2) and the lower mold (3) inside, and ensures the airtightness of the molding process. The upper mold (2) and the lower mold (3) cooperate to form a cavity. Vertical pressure is applied in the injection box (1) by sliding sleeve. The lower mold (3) and the upper mold (2) together constitute the molding cavity of the valve. The injection liquid connector (4) is used to inject hard alloy mixed molten material into the mold cavity under high pressure. The coolant interface (5) is used to accelerate the cooling and solidification of the molded valve. The adjustment part (6) is used to fine adjust the fitting gap between the upper mold (2) and the lower mold (3).

2. The high speed precision forming die for wear resistant carbide valve parts according to claim 1, characterized in that: The adjustment part (6) includes a movable metal frame (61), a stepper motor (62) and a threaded rod (63). The movable metal frame (61) is fixedly connected to the outside of the upper mold (2). The stepper motor (62) is threadedly connected to the top of the injection box (1). The top of the threaded rod (63) is fixedly connected to the motor shaft of the stepper motor (62) through a coupling.

3. The high speed precision forming die for wear resistant carbide valve parts according to claim 2, characterized in that: The top of the movable metal frame (61) is also provided with a hydraulic cylinder (7), a push rod (8) and a metal folding frame (9). The piston end of the hydraulic cylinder (7) is fixedly connected to one end of the push rod (8), and the outer side of the push rod (8) is fixedly connected to the top of the metal folding frame (9). The metal folding frame (9) is slidably engaged with the top of the upper mold (2).

4. The high speed precision forming die for wear resistant carbide valve parts according to claim 3, characterized in that: The upper mold (2) has several sets of air holes (10) on its inner top side.

5. The high speed precision forming die for wear resistant carbide valve parts according to claim 2, characterized in that: The movable metal frame (61) has a threaded groove (11) that is adapted to the size of the threaded rod (63) through it.

6. The high speed precision forming die for wear resistant carbide valve parts according to claim 1, characterized in that: The upper mold (2) and the lower mold (3) have coolant tanks (12) of equal size inside.

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