Self-sealing injection structure of negative pressure feeding ball valve of hot chamber die casting machine

Abstract

The utility model discloses a kind of self-sealing injection structure of negative pressure feed ball valve of hot chamber die casting machine, including material kettle and injection material driving device, material kettle includes material kettle body, boss cylinder, ball valve and injection nozzle;Material kettle body is equipped with boss cylinder, boss cylinder is equipped with pressure material cavity;Boss cylinder bottom is equipped with boss cylinder feed hole, boss cylinder side wall is opened with boss cylinder discharge hole in bottom position close;The bottom of material kettle body is equipped with material kettle feed hole, the inner of material kettle body is equipped with respectively intercommunication boss cylinder discharge hole and the inclined discharge channel of goose neck discharge port;Boss cylinder feed hole upper end is equipped with the embedded position of diameter greater than the diameter of other position of boss cylinder feed hole;Ball valve is embedded and top surface is lower than pressure material cavity bottom surface, ball valve can be used to block lower end port of embedded position;Injection nozzle is installed at goose neck discharge port;The pressure material hammer head of injection material driving device can be inserted into pressure material cavity and move up and down.The utility model makes pressure material hammer head high-speed downward movement not to press ball valve, and metal liquid is not easy to let ball valve be pushed.

Description

Technical Field

[0001] This utility model relates to the field of hot chamber die casting machine technology, specifically to a negative pressure feeding ball valve self-sealing injection structure for a hot chamber die casting machine. Background Technology

[0002] A hot chamber die casting machine is an industrial casting machine that injects molten metal into a mold under pressure to cool and solidify, resulting in a solid metal casting after the mold is opened. Its working principle is based on pressure and speed control, and the specific process is as follows: First, the metal (usually lead, zinc, tin, etc.) is heated to its melting point. Then, the molten metal is injected into the mold cavity under high pressure and high speed through an injection mechanism. The cooling water inside the mold rapidly cools and solidifies the metal, and finally, the mold is opened to remove the finished product for further processing.

[0003] For hot chamber die casting machines, a typical component includes an injection structure. For example, the injection mechanism of a high-speed die casting machine disclosed in patent publication number CN218192457U specifically discloses a material pot and an injection drive device. The pressure part of the injection drive device can move up and down within the material cavity of the material pot. The material pot includes a material pot body, a sleeve, a ball valve, and an injection nozzle. The sleeve is longitudinally installed inside the material pot body, and its interior has a pressure cavity for the pressure part of the injection drive device to insert into. The bottom of the sleeve is open... The device includes a feed inlet for the ejector sleeve, a discharge outlet for the ejector sleeve near its bottom, and a feed inlet for the container body connected to the feed inlet of the ejector sleeve at its bottom. An outlet channel is located inside the container body, with its lower end connected to the discharge outlet of the ejector sleeve and its upper end extending upwards to the discharge port at the neck of the container body. A nozzle is installed at the discharge port of the container body, and a ball valve is located at the bottom of the ejector sleeve, capable of falling into the upper recess of the discharge outlet of the ejector sleeve. The injection drive device includes an injection support frame, an injection drive cylinder, and a pressure hammer. The injection drive cylinder is mounted directly above the container via the injection support frame. The pressure hammer is connected to the output rod of the injection drive cylinder and is longitudinally inserted into the pressure chamber of the ejector sleeve, allowing it to move vertically relative to it.

[0004] However, in the aforementioned high-speed die-casting machine's injection mechanism, although the ball valve is located at the bottom of the ejector sleeve and can fall into the upper recess of the ejector sleeve's feed port, it is clear from the attached diagram that, in this design, only the lower end of the ball valve is actually embedded in the upper recess, while the upper end protrudes from it. This protrusion of the upper end of the ball valve can easily cause several problems, such as: 1. When the pressure hammer is pressing downwards and abnormal operations such as exceeding the preset stroke occur due to cylinder issues, the pressure hammer can easily press against the ball valve, potentially damaging the ball valve, the ejector sleeve's discharge port, and the side wall of the upper recess, thus causing equipment damage; 2. Because the ball valve protrudes from the upper recess and the ejector sleeve's discharge port is close to the ejector sleeve's feed port and the ball valve. Therefore, when the pressure hammer moves downward at high speed and pressure, the molten metal in the sleeve will rush to the sleeve discharge port instantly. The continuously flowing molten metal may push the ball valve located at the upper concave position, which may cause the ball valve to fail to completely block the sleeve feed port. This may result in the molten metal overflowing outward through the sleeve feed port and ultimately causing defective castings. In other words, the defective castings may experience a shortage of material due to the molten metal overflowing out of the sleeve feed port.

[0005] Therefore, improvements to existing technologies are necessary. Utility Model Content

[0006] To address the problems existing in the prior art, the purpose of this utility model is to provide a self-sealing injection structure for a negative pressure feed ball valve of a hot chamber die casting machine. By setting the ball valve to be fully embedded in the embedded position, the pressure hammer will not press the ball valve when moving downward at high speed, and the flowing molten metal will not easily push the ball valve and cause it to loosen. In other words, the molten metal will be prevented from overflowing out of the feed hole of the sleeve.

[0007] To achieve the above objectives, the technical solution of this utility model is as follows:

[0008] A negative pressure feeding ball valve self-sealing injection structure for a hot chamber die casting machine includes a material pot and an injection drive device. The material pot includes a material pot body, a sleeve, a ball valve, and an injection nozzle. The sleeve is installed in the inner cavity of the material pot body. The sleeve has a pressure chamber inside, a sleeve feed hole communicating with the pressure chamber is opened at the bottom of the sleeve, and a sleeve discharge hole communicating with the pressure chamber is opened on the side wall of the sleeve near the bottom. A material pot feed hole communicating with the sleeve feed hole is opened at the bottom of the material pot body. A discharge channel is opened inside the material pot body; the lower end of the discharge channel communicates with the sleeve discharge hole. The upper end of the channel extends upward at an angle to the gooseneck outlet of the material container body; the nozzle is installed at the gooseneck outlet; the diameter of the upper end of the feed hole of the ejector sleeve is larger than the diameter of the rest, so that the upper end forms an embedded position; the ball valve is fitted into the embedded position and the top surface of the ball valve is lower than the bottom surface of the pressing chamber, and the ball valve can be used to block the lower port of the embedded position; the pressing hammer of the injection drive device can be inserted into the pressing chamber vertically; this prevents the pressing hammer from pressing the ball valve when moving downward at high speed, and also prevents the flowing molten metal from pushing the ball valve and causing it to loosen.

[0009] Furthermore, the bottom surface of the embedding position is inclined downwards from the outside to the center on all four sides.

[0010] Furthermore, a gap is provided between the side of the ball valve and the side of the embedded position.

[0011] Furthermore, the bottom surface of the pressing chamber is inclined downwards from the outside to the center.

[0012] Furthermore, the injection drive device also includes a support frame and a pressing cylinder; the support frame is fixedly installed; the pressing cylinder is fixed on the support frame and the output shaft of the pressing cylinder is connected to the pressing hammer.

[0013] Furthermore, the ball valve is made of tungsten steel.

[0014] The beneficial effects of this utility model are as follows:

[0015] This invention, by setting the ball valve to be fully embedded in the embedded position, prevents the pressure hammer from pressing the ball valve when moving downwards at high speed, and also prevents the flowing molten metal from pushing the ball valve and causing it to loosen, thus avoiding the molten metal from overflowing out of the feed port of the sleeve. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2This is a partial structural diagram of the present invention. Figure 1 ;

[0018] Figure 3 This is a partial structural diagram of the present invention. Figure 2 ;

[0019] Figure 4 This is a partial structural diagram of the present invention. Figure 3 ;

[0020] Figure 5 yes Figure 4 Cross-sectional view along the middle AA;

[0021] Figure 6 yes Figure 5 Enlarged view of point B in the image;

[0022] Figure 7 This is a schematic diagram of the present invention in use.

[0023] Figure Labels

[0024] 1. Material container; 11. Material container body; 111. Material container inner cavity; 112. Material container inlet; 113. Material outlet channel; 114. Embedded position; 115. Gap; 12. Squeegee; 121. Pressing chamber; 122. Squeegee inlet; 123. Squeegee outlet; 13. Ball valve; 14. Nozzle;

[0025] 2. Material injection drive device; 21. Material clamping hammer; 22. Support frame; 23. Material clamping cylinder; 24. Hammer clamp; 25. Hammer handle;

[0026] 3. Mold. Detailed Implementation

[0027] The utility model will be further described below with reference to the accompanying drawings and specific embodiments. The following description is merely exemplary and does not limit the scope of protection of the utility model.

[0028] like Figures 1-7 As shown, a negative pressure feeding ball valve self-sealing injection structure for a hot chamber die casting machine includes a material pot 1 and an injection drive device 2.

[0029] The material container 1 includes a material container body 11, a sleeve 12, a ball valve 13, and a nozzle 14. The sleeve 12 is installed in the inner cavity 111 of the material container body 11, and the inside of the sleeve 12 is provided with a pressing chamber 121.

[0030] like Figure 5As shown, a feed hole 122 communicating with the pressing chamber 121 is provided at the bottom of the feed tube 12, and a discharge hole 123 communicating with the pressing chamber 121 is provided on the side wall of the feed tube 12 near the bottom. A feed hole 112 communicating with the feed hole 122 is provided at the bottom of the pot body 11. A discharge channel 113 is provided inside the pot body 11. The lower end of the discharge channel 113 is connected to the feed hole 123, and the upper end of the discharge channel 113 extends upward at an angle to the gooseneck discharge port of the pot body 11. The nozzle 14 is installed at the gooseneck discharge port. With the above arrangement, molten metal can enter the pressing chamber 121 through the pot feed hole 112 and the feed hole 122.

[0031] like Figure 5 As shown, the diameter at the upper end of the feed port 122 is larger than the diameter at other locations, forming an embedded position 114 at the upper end. The ball valve 13 is fitted into the embedded position 114, and the top surface of the ball valve 13 is lower than the bottom surface of the pressure chamber 121. The ball valve 13 can be used to block the lower port of the embedded position 114. By setting the ball valve 13 to be fully embedded in the embedded position 114, the pressure hammer 21 will not press against the ball valve 13 when moving downward at high speed, and the flowing molten metal will not easily push the ball valve 13 and cause it to loosen, thus preventing the molten metal from overflowing out of the feed port 122.

[0032] like Figure 5 As shown, the material injection drive device 2 includes a support frame 22 and a pressing cylinder 23. The support frame 22 is fixedly installed, and the pressing cylinder 23 is mounted directly above the material container 1 via the support frame 22. The output shaft of the pressing cylinder 23 is connected to the pressing hammer head 21, and the pressing hammer head 21 is longitudinally inserted into the pressing chamber 121 of the sleeve 12 and can move up and down relative to it. Specifically, the output shaft of the pressing cylinder 23 is connected to the upper end of a hammer clamp 24, the lower end of the hammer clamp 24 is connected to the upper end of a hammer handle 25, and the lower end of the hammer handle 25 is connected to the pressing hammer head 21. The pressing hammer head 21 can move up and down by being driven by the pressing cylinder 23, and the pressing hammer head 21 can move stably by being driven by the cylinder.

[0033] like Figure 5 , Figure 6 As shown, the bottom surface of the embedded position 114 is inclined downward from the outside to the center. Therefore, since the bottom surface of the embedded position 114 is inclined and has a guiding function, the ball valve 13 can quickly block the feed port when it falls.

[0034] like Figure 5 , Figure 6As shown, a gap 115 is provided between the side of the ball valve 13 and the side of the insertion position 114 to prevent the side of the ball valve 13 from getting stuck with the side of the insertion position 114, thereby allowing the ball valve 13 to move more smoothly.

[0035] like Figure 5 , Figure 6 As shown, the bottom surface of the pressing chamber 121 is sloped downwards from the outside to the center.

[0036] Similarly, since the bottom surface of the pressure chamber 121 is designed to be inclined and has a guiding function, the ball valve 13 can fall more accurately into the embedding position 114 of the feed hole 122 when it falls.

[0037] The following describes the specific working principle of this utility model in order to help you understand it:

[0038] like Figure 1 — Figure 7 As shown, during use, the nozzle 12 is used to cooperate with the mold 3. When the pressure cylinder 23 of the injection drive device 2 drives the pressure hammer 21 to rise, due to the suction, the ball valve 13 moves upward and disengages from the upper embedded position 114 of the ejector sleeve inlet hole 122, and opens the ejector sleeve outlet hole 123. At this time, liquid material (such as molten metal) will enter the pressure chamber 121 of the ejector sleeve 12 through the material pot inlet hole 112 and the ejector sleeve inlet hole 122 respectively. Before the pressure cylinder 23 drives the pressure hammer 21 to press down, due to gravity, the ball valve 13 will automatically fall back to the embedded position 114 to block the ejector sleeve inlet hole 122. At this time, the ejector sleeve inlet hole 122 is closed and the ejector sleeve outlet hole 123 is open, so that the molten metal will be injected into the cavity of the mold 3 through the ejector sleeve outlet hole 123, the discharge channel 113 and the nozzle 14.

[0039] This utility model is not limited to the above-described embodiments. If any modifications or variations to this utility model do not depart from the spirit and scope of this utility model, and if such modifications and variations fall within the scope of the claims and equivalent technologies of this utility model, then this utility model also intends to include such modifications and variations.

Claims

1. A self-sealing injection structure for a negative pressure feed ball valve in a hot chamber die-casting machine, characterized in that: Includes a material container and a material injection drive device; The material container includes a container body, a sleeve, a ball valve, and a nozzle. The sleeve is installed inside the container body. The sleeve has a pressing chamber inside, a sleeve inlet hole communicating with the pressing chamber is opened at the bottom of the sleeve, and a sleeve outlet hole communicating with the pressing chamber is opened on the side wall of the sleeve near the bottom. A material inlet hole communicating with the sleeve inlet hole is opened at the bottom of the container body. A discharge channel is opened inside the container body. The lower end of the discharge channel communicates with the sleeve outlet hole, and the upper end of the discharge channel extends upwards at an angle to the gooseneck outlet of the container body. The nozzle is installed at the gooseneck outlet. The diameter at the upper end of the feed port of the sleeve is larger than the diameter at the other positions, so that the upper end forms an embedded position; the ball valve is fitted into the embedded position and the top surface of the ball valve is lower than the bottom surface of the pressure chamber, and the ball valve can be used to block the lower port of the embedded position; The pressure hammer of the injection drive device can be inserted into the pressure chamber by moving up and down; By setting the ball valve to be fully embedded in the embedded position, the pressure hammer will not press on the ball valve when moving downward at high speed, and the flowing molten metal will not easily push the ball valve and cause it to loosen.

2. The self-sealing injection structure of the negative pressure feed ball valve of the hot chamber die-casting machine according to claim 1, characterized in that: The bottom surface of the embedding position is sloped downwards from the outside to the center.

3. The self-sealing injection structure of the negative pressure feed ball valve of the hot chamber die-casting machine according to claim 1, characterized in that: A gap is provided between the side of the ball valve and the side of the embedded position.

4. The self-sealing injection structure of the negative pressure feed ball valve of the hot chamber die-casting machine according to claim 1, characterized in that: The bottom surface of the pressing chamber is sloped downwards from the outside to the center.

5. The self-sealing injection structure of the negative pressure feed ball valve of the hot chamber die-casting machine according to claim 1, characterized in that: The material injection drive device also includes a support frame and a pressure cylinder; the support frame is fixedly installed; the pressure cylinder is fixed on the support frame and the output shaft of the pressure cylinder is connected to the pressure hammer.

6. The self-sealing injection structure of the negative pressure feed ball valve of the hot chamber die-casting machine according to claim 1, characterized in that: The ball valve is made of tungsten steel.

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