A dosing device and method for a die-casting apparatus

Abstract

This invention discloses a quantitative dispensing device and method for a die-casting molding equipment, comprising: a material cylinder fixed in a fixed plate of the die-casting molding equipment, with a feed inlet on its side wall; a side sealing plate disposed on the side wall of the material cylinder and sliding along a direction parallel to the axis of the material cylinder to open or block the feed inlet; a feed pipe, one end connected to the feed inlet and the other end connected to an external holding furnace to guide the molten material from the holding furnace into the material cylinder; an upper sealing plate slidably disposed in the fixed mold of the die-casting molding equipment and having an opening adapted to the material cylinder, the upper sealing plate being located above the material cylinder and sliding along a direction perpendicular to the axis of the material cylinder, so that the opening is aligned with or offset from the inner cavity of the material cylinder, thereby opening or blocking the inner cavity; and an injection punch disposed inside the material cylinder and sliding along the axis of the material cylinder, which, together with the upper sealing plate, determines the practical length of the material cylinder during feeding, thereby changing the usable volume of the material cylinder and realizing quantitative dispensing. The entire operation is carried out in a closed environment to avoid the entrapment of gases and oxidation.

Description

Technical Field

[0001] This invention relates to the field of die casting, and more particularly to a quantitative broth feeding device and method for die casting molding equipment. Background Technology

[0002] Die casting equipment injects a certain volume of molten metal or non-metal (i.e., molten slurry) into a mold cavity under pressure to cool and solidify into a casting. The molten slurry feeding device is one of the important components of die casting equipment.

[0003] Common molten metal feeding devices use a ladle fixed to a linkage mechanism to scoop molten metal from the surface of the furnace, move it to the die-casting equipment's cylinder, and then pour the molten metal into the cylinder's inlet. However, the ladle agitates and shakes the molten metal and traps air during scooping, moving, and pouring, accelerating its oxidation. Furthermore, this simple scooping process makes it difficult to precisely control the amount of molten metal. Therefore, a metering cup has been used instead of a ladle, as seen in Chinese patent CN102935499A. However, during the pouring process, the molten metal still comes into contact with air, and oxidation occurs on the open surface of the molten metal in the furnace, ultimately reducing the quality of the casting. A metering furnace employs a fully sealed design, controlling the air pressure above the molten metal to directly deliver it to the die-casting machine's cylinder. Compared to the ladle-scooping and pouring process, this reduces the contact between the molten metal and air during extraction and injection, improving the quality of the molten metal entering the mold cavity to some extent. However, its quantitative accuracy depends on the stability of gas pressure control. Pressure fluctuations of compressed gas, pipeline unobstructedness, valve response speed, etc., will directly affect the actual output of molten liquid and product quality. Moreover, the production and maintenance costs of this type of holding furnace are high. Summary of the Invention

[0004] This invention addresses the shortcomings of existing technologies by providing a quantitative broth feeding device for a die-casting molding equipment, comprising: A material cylinder is fixed in the fixed plate of the die-casting molding equipment, and the side wall of the material cylinder is provided with a feed port; A side sealing plate is disposed on the side wall of the material cylinder and slides in a direction parallel to the axis of the material cylinder to open or block the feed inlet; A feed pipe, one end of which is connected to the feed inlet and the other end of which is used to connect to an external heat preservation furnace to introduce the soup material in the heat preservation furnace into the feed cylinder; An injection punch is disposed inside the material cylinder and slides along the axial direction of the material cylinder to change the available volume of the material cylinder and realize quantitative dispensing of soup. An upper sealing plate is slidably disposed in the fixed mold of the die-casting molding equipment. The upper sealing plate has an opening adapted to the material cylinder. The upper sealing plate is located above the material cylinder and slides along a direction perpendicular to the axis of the material cylinder, so that the opening is aligned with or misaligned with the inner cavity of the material cylinder, thereby opening or sealing the inner cavity.

[0005] Optionally, a sealing ring is provided at the upper end of the inner cavity, which is used to prevent the soup from being carried away from the feed cylinder during the sliding process of the upper sealing plate.

[0006] Optionally, the inner wall of the opening is provided with a flow guide ring, which is used to adjust the flow state of the soup during the injection process.

[0007] Optionally, the flow guide ring is a divergent flow guide ring, which includes a first contact surface, a second contact surface, and a third contact surface. The first contact surface is connected to the inner wall of the opening. The second contact surface is located vertically at the lower end of the first contact surface and extends radially toward the center of the opening. The upper and lower ends of the third contact surface are respectively connected to the first contact surface and the second contact surface. The first contact surface and the second contact surface are both planar, and the third contact surface is an arc surface.

[0008] Optionally, the flow guide ring is a nozzle-type flow guide ring, which includes a fourth contact surface and a fifth contact surface. The fourth contact surface is connected to the inner wall of the opening, and the upper and lower ends of the fifth contact surface are respectively connected to the upper and lower ends of the fourth contact surface. The fourth contact surface is a plane, and the fifth contact surface is an arc surface.

[0009] Optionally, it further includes a side plate drive and an upper plate drive, wherein the side plate drive is connected to the side sealing plate and drives the side sealing plate to move, and the upper plate drive is connected to the upper sealing plate and drives the upper sealing plate to move.

[0010] Optionally, when the heat preservation furnace is located below the material cylinder, the end of the feed pipe away from the feed inlet extends downward to be immersed below the liquid surface of the soup in the heat preservation furnace. Under the action of the negative pressure in the material cylinder and / or the gas pressure on the inner surface of the heat preservation furnace, the soup in the heat preservation furnace is injected into the material cylinder along the feed pipe.

[0011] Optionally, when the heat preservation furnace is located above the material cylinder, the end of the feed pipe away from the feed inlet extends upward, and the height of the connection between the feed pipe and the heat preservation furnace is not lower than the height of the top surface of the material cylinder. The soup flows into the material cylinder along the feed pipe under the action of gravity.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The opening and closing of the feed inlet is controlled by the sliding movement of the side sealing plate, thereby connecting or disconnecting the connection between the holding furnace and the feed cylinder, achieving soup feeding control. The entire soup feeding process is carried out in a closed environment, avoiding the scooping, moving, and tilting actions of traditional methods, and preventing oxidation problems caused by gas entrapment. Moreover, by changing the usable volume of the feed cylinder through the axial movement of the injection punch, the metering accuracy is unaffected by fluctuations in gas source pressure and pipeline conditions compared to existing technologies. The entire conveying and metering process is completed in a relatively closed or controllable feed cylinder, significantly reducing the contact between the molten soup and air. The structure is ingenious and reliable, and the cost is low.

[0013] 2. By sliding the upper sealing plate horizontally, the inner cavity of the barrel is separated from the sprue of the fixed mold, so that the slurry is in a closed environment before being injected into the barrel and before injection, preventing the surface of the slurry from contacting the air and causing oxidation; the channel is opened only during injection, ensuring that the slurry maintains high quality at the moment of injection into the mold cavity.

[0014] 3. The sealing ring at the upper end of the inner cavity can scrape off the adhering broth when the upper sealing plate slides, preventing the broth from being carried out of the barrel, thus avoiding waste and contamination, maintaining equipment cleanliness, and preventing the carried-out broth from cooling and solidifying to form a blockage. A guide ring is installed on the inner wall of the opening to regulate the flow of broth into the gating system during injection, resulting in smoother filling.

[0015] 4. The side sealing plate and side plate drive components work together, as do the upper sealing plate and upper plate drive components, enabling automated and programmed control. This results in fast response and accurate positioning, perfectly matching the cycle time of the die-casting machine. This ensures the repeatability of each injection and stamping process, thereby improving production efficiency and casting quality consistency. It also accelerates the production cycle, allowing for immediate venting of the mold cavity after mold closing, eliminating concerns about premature solidification due to molten material being sucked into the cavity.

[0016] 5. The gas above the broth in the heat preservation furnace only needs to maintain an appropriate pressure value. Unlike the traditional (low-pressure die casting) feeding method, which involves repeatedly increasing and decreasing the pressure in each die casting cycle to control the injection of broth, this method further saves energy.

[0017] In addition, the present invention provides a quantitative broth feeding method for a die-casting molding equipment, which is applied to the quantitative broth feeding device of the die-casting molding equipment as described above. The specific steps are as follows: Step S1: Start the mold closing action, move the upper sealing plate so that the opening of the upper sealing plate is misaligned with the inner cavity of the material cylinder, thereby cutting off the connection between the sprue of the fixed mold and the material cylinder. Step S2: Move the injection punch to the preset quantitative position to create a negative pressure in the material cylinder; move the side sealing plate to connect the feed pipe with the feed inlet of the material cylinder, so that the soup in the heat preservation furnace enters through the feed pipe and fills the material cylinder; Step S3: Move the side sealing plate to disconnect the feed pipe and the feed inlet, and the quantitative soup dispensing action is completed; Step S4: After completing the mold closing action, move the upper sealing plate so that the opening of the upper sealing plate is aligned with the inner cavity of the material cylinder, thereby connecting the sprue of the fixed mold with the material cylinder. Step S5: Begin the injection process; after cooling, open the mold and remove the casting. Step S6: Move the injection punch back to the initial position.

[0018] Optionally, in step S2, the injection punch moves to the preset quantitative position before or after the side sealing plate is opened.

[0019] Compared with the prior art, the quantitative broth feeding method of the die casting molding equipment described in this invention has the same advantages as the quantitative broth feeding device of the die casting molding equipment described above, which will not be repeated here. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be discussed below. Obviously, the technical solutions described in conjunction with the accompanying drawings are only some embodiments of the present invention. For those skilled in the art, other embodiments and their accompanying drawings can be obtained based on the embodiments shown in these drawings without creative effort.

[0021] Figure 1 This is a partial structural schematic diagram of the quantitative soup dispensing device of the present invention.

[0022] Figure 2 This is a schematic diagram of the quantitative soup dispensing device of the present invention.

[0023] Figure 3 This is a cross-sectional view of an embodiment of the quantitative soup dispensing device of the present invention. Figure 1 .

[0024] Figure 4 yes Figure 3 Enlarged view of part A in the middle.

[0025] Figure 5 This is a cross-sectional view of an embodiment of the quantitative soup dispensing device of the present invention. Figure 2 .

[0026] Figure 6 yes Figure 5 Enlarged view of section B in the middle.

[0027] Figure 7 This is a cross-sectional view of an embodiment of the quantitative soup dispensing device of the present invention. Figure 3 .

[0028] Figure 8This is a cross-sectional view of the quantitative soup dispensing device of the present invention using a divergent flow guide ring. Figure 4 .

[0029] Figure 9 yes Figure 8 Enlarged view of section C.

[0030] Figure 10 This is a cross-sectional view of the quantitative soup dispensing device of the present invention using a nozzle-type guide ring. Figure 5 .

[0031] Figure 11 yes Figure 10 Enlarged view of section D in the middle.

[0032] Figure 12 This is the process flow of the quantitative soup dispensing method of the present invention. Figure 1 .

[0033] Figure 13 This is the process flow of the quantitative soup dispensing method of the present invention. Figure 2 .

[0034] In the diagram: 1. Barrel; 11. Inlet; 12. Inner cavity; 13. Sealing ring; 2. Side sealing plate; 3. Feed pipe; 4. Injection punch; 5. Top sealing plate; 51. Opening; 52. Diverging guide ring; 521. First contact surface; 522. Second contact surface; 523. Third contact surface; 53. Nozzle-type guide ring; 531. Fourth contact surface; 532. Fifth contact surface; 6. Fixed plate; 7. Fixed mold; 71. Sprue; 8. Side plate drive component; 9. Top plate drive component. Detailed Implementation

[0035] The technical solutions of various embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments described in the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] like Figures 1 to 6 As shown, an embodiment of the present invention provides a quantitative dispensing device for a die-casting molding equipment, comprising: The material cylinder 1 is fixed in the fixed plate 6 of the die casting molding equipment, and the side wall of the material cylinder 1 is provided with a feed inlet 11; Side sealing plate 2, the side sealing plate 2 is disposed on the side wall of the material cylinder 1 and slides in a direction parallel to the axis of the material cylinder 1 to open or block the feed port 11; Feed pipe 3, one end of which is connected to the feed port 11, and the other end is used to connect to an external heat preservation furnace (not shown) to introduce the soup material in the heat preservation furnace into the feed cylinder 1; The injection punch 4 is disposed inside the material cylinder 1 and slides along the axial direction of the material cylinder 1 to change the available volume of the material cylinder 1 and realize quantitative soup dispensing. The upper sealing plate 5 is slidably disposed in the fixed mold 7 of the die-casting molding equipment. The upper sealing plate 5 is provided with an opening 51 that is adapted to the material cylinder 1. The upper sealing plate 5 is located above the material cylinder 1 and slides in a direction perpendicular to the axis of the material cylinder 1, so that the opening 51 is aligned with or misaligned with the inner cavity 12 of the material cylinder 1, thereby opening or blocking the inner cavity 12.

[0037] The size of the opening 51 is adapted to the cross-sectional size of the barrel 1. The amount of soup supplied is determined by the volume of the inner cavity 12 of the barrel 1. The barrel 1 is a cylinder. The amount of soup supplied can be controlled by adjusting the height position of the injection punch 4 in the barrel 1. Before the injection action occurs, the axial height of the injection punch 4 is not higher than the height of the feed inlet 11 to avoid clogging the feed inlet 11.

[0038] By setting the upper sealing plate 5, the cross-sectional dimensions of the upper sealing plate 5, the injection punch 4, and the material cylinder 1 define the effective volume of the inner cavity 12. When the upper sealing plate 5 blocks the top of the inner cavity 12, the inner cavity 12 is in a closed state, and the pressure inside the inner cavity 12 is not affected by the feeding pressure of the external holding furnace. In contrast, the prior art does not have an upper sealing plate 5, and the height of the broth in the material cylinder 1 is controlled by the gas pressure of the holding furnace.

[0039] Specifically, the vacuuming process is as follows: Both the upper sealing plate 5 and the side sealing plate 2 are in a closed state, meaning the opening of the upper sealing plate 5 is misaligned with the inner cavity 12 of the barrel 1, thus cutting off the connection between the sprue of the fixed mold and the barrel 1, and the side sealing plate 2 blocks the feed port 11. At this time, the injection punch 4 is in the position closest to the upper sealing plate 5, and the air at this time exists only in the narrow gap between the upper sealing plate 5 and the injection punch 4. When the injection punch 4 moves down to the final metering position, the volume of the sealed space increases and the pressure decreases, forming a near-vacuum state (the term "vacuuming" throughout this invention refers to this state). Unlike existing technologies, this invention does not require controlling the furnace pressure to allow the residual broth in the feed pipe 3 to flow back into the holding furnace. Instead, it can maintain the furnace pressure, keeping the broth in the feed pipe 3 constantly filled, and filling begins immediately when the side sealing plate 2 is opened.

[0040] like Figure 3As shown, the opening and closing of the feed inlet 11 is controlled by the sliding movement of the side sealing plate 2, thereby connecting or blocking the connection between the holding furnace and the feed cylinder 1, realizing soup feeding control. The entire soup feeding action is carried out in a closed environment, avoiding the scooping, moving, and tilting actions of the soup ladle used in traditional methods, and avoiding oxidation problems caused by gas entrapment. Moreover, the available volume of the feed cylinder 1 is changed by the axial movement of the injection punch 4. Compared with the existing technology, the quantitative accuracy is not affected by the fluctuation of gas source pressure and pipeline status. The entire conveying and quantitative process is completed in the relatively closed or controllable feed cylinder 1, which greatly reduces the contact between the soup melt and air. The structure is ingenious and reliable, and the cost is low.

[0041] Figure 4 The middle part shows the situation where the opening 51 is misaligned with the inner cavity 12 of the barrel 1, at which point the inner cavity 12 is blocked. Figure 6 With the opening 51 aligned with the inner cavity 12, the inner cavity 12 is open. The fixed mold 7 of the die-casting equipment is positioned above the fixed plate 6. The fixed mold 7 has a sprue 71, which connects to the inner cavity 12 of the barrel 1 through the opening 51. During injection, the injection punch 4 injects the molten material from the barrel 1 into the sprue 71. The upper sealing plate 5 slides horizontally, separating the inner cavity 12 from the sprue 71 of the fixed mold 7. This keeps the molten material in a closed environment before injection into the barrel 1 and before injection, preventing oxidation from contact with air. The channel is opened only during injection, ensuring that the molten material maintains high quality as it enters the mold cavity through the sprue 71.

[0042] like Figure 8 and Figure 9 As shown, optionally, a sealing ring 13 is provided at the upper end of the inner cavity 12. The sealing ring 13 is used to prevent the soup from being carried away from the feed cylinder 1 during the sliding process of the upper sealing plate 5.

[0043] The top of the feed cylinder 1 is recessed with an annular mounting groove, and the sealing ring 13 is installed in the mounting groove. The diameter of the sealing ring 13 is larger than the diameter of the inner cavity 12. The sealing ring 13 can scrape off the attached soup when the upper sealing plate 5 slides, preventing the soup from being carried out of the feed cylinder 1, thus avoiding waste and pollution, maintaining the cleanliness of the equipment, and preventing the carried-out soup from cooling and solidifying to form a blockage.

[0044] Optionally, the inner wall of the opening 51 is provided with a flow guide ring, which is used to adjust the flow state of the soup during the injection process.

[0045] Both the sealing ring 13 and the guide ring are made of high-temperature resistant and wear-resistant materials. The guide ring, located on the inner wall of the opening 51, allows for regulation of the flow of the broth entering the gating system 71 during injection, resulting in smoother filling and increased filling speed and holding pressure. In other embodiments, the flow state of the broth can also be adjusted and controlled by setting a specific shape for the opening 51 (i.e., setting the shape of the guide ring on the opening 51, eliminating the need for a separate guide ring).

[0046] like Figure 8 and Figure 9 As shown, optionally, the guide ring is a divergent guide ring 52, which includes a first contact surface 521, a second contact surface 522, and a third contact surface 523. The first contact surface 521 is connected to the inner wall of the opening 51. The second contact surface 522 is located vertically at the lower end of the first contact surface 521 and extends radially toward the center of the opening 51. The upper and lower ends of the third contact surface 523 are respectively connected to the first contact surface 521 and the second contact surface 522. The first contact surface 521 and the second contact surface 522 are both planar, and the third contact surface 523 is an arc surface.

[0047] The injection punch 4 can be fitted with the shape of the diverging guide ring 52 to reduce the front volume of the injection punch 4. The diverging guide ring 52 can help form laminar flow, making the filling process more stable. In addition, the second contact surface 522 can reduce the passage area of ​​the molten material when it enters the sprue 71 of the fixed mold 7, thereby increasing the pressure of the molten material during injection while keeping the injection force constant, and reducing the area of ​​the molten material cake.

[0048] like Figure 10 and Figure 11 As shown, optionally, the guide ring is a nozzle-type guide ring 53. The nozzle-type guide ring 53 includes a fourth contact surface 531 and a fifth contact surface 532. The fourth contact surface 531 is connected to the inner wall of the opening 51. The upper and lower ends of the fifth contact surface 532 are respectively connected to the upper and lower ends of the fourth contact surface 531. The fourth contact surface 531 is a plane, and the fifth contact surface 532 is an arc surface.

[0049] The nozzle-type guide ring 53 forms a converging channel through the arc surface of the fifth contact surface 532, which makes it easier to control the flow speed and injection method of the soup stock. It allows the soup stock to gather and accelerate through the opening 51 during injection, entering the runner 71 in a concentrated and rapid jet state.

[0050] like Figure 1 and Figure 3As shown, optionally, it also includes a side plate drive member 8 and an upper plate drive member 9. The side plate drive member 8 is connected to the side sealing plate 2 and drives the side sealing plate 2 to move, and the upper plate drive member 9 is connected to the upper sealing plate 5 and drives the upper sealing plate 5 to move.

[0051] The side sealing plate 2 and the side plate drive component 8 cooperate, and the upper sealing plate 5 and the upper plate drive component 9 cooperate, enabling automated and programmed control. This results in fast response and accurate positioning, and can be synchronized with the die-casting machine's cycle time, ensuring the repeatability of each injection and stamping process, thereby improving production efficiency and casting quality consistency. It can accelerate the production cycle, and after mold closing, venting of the mold cavity can begin immediately, eliminating concerns about the molten material being sucked into the mold cavity and solidifying prematurely.

[0052] like Figure 3 As shown, optionally, when the heat preservation furnace is located below the material cylinder 1, the end of the feed pipe 3 away from the feed inlet 11 extends downward to be immersed below the liquid surface of the soup in the heat preservation furnace. Under the action of the negative pressure in the material cylinder 1 and / or the gas pressure on the inner surface of the heat preservation furnace, the soup in the heat preservation furnace is injected into the material cylinder 1 along the feed pipe 3.

[0053] When the heat preservation furnace is located below the material cylinder 1, the feed pipe 3 is immersed below the surface of the soup. The pressure injection punch 4 moves downward to the quantitative position and evacuates the material cylinder 1, creating a negative pressure inside the material cylinder 1. After opening the side sealing plate 2, the soup is pressed into the material cylinder 1 along the feed pipe 3, realizing the conveying of the soup. This avoids the surface of the soup being exposed and reduces the surface agitation during material removal, thus inhibiting oxidation.

[0054] The gas above the broth in the heat-preserving furnace only needs to maintain an appropriate pressure value. Unlike the traditional (low-pressure die casting) feeding method, which involves repeatedly increasing and decreasing pressure in each die casting cycle to control the injection of broth, this method further saves energy.

[0055] like Figure 7 As shown, optionally, when the heat preservation furnace is located above the material cylinder 1, the end of the feed pipe 3 away from the feed inlet 11 extends upward, and the height of the connection between the feed pipe 3 and the heat preservation furnace is not lower than the height of the top surface of the material cylinder 1. The soup flows into the material cylinder 1 along the feed pipe 3 under the action of gravity, which is simpler.

[0056] like Figure 12 and Figure 13 As shown, another embodiment of the present invention provides a quantitative broth feeding method for a die-casting molding equipment, applied to the quantitative broth feeding device of the die-casting molding equipment as described above, and the specific steps are as follows: Step S1: Start the mold closing action, move the upper sealing plate 5, so that the opening 51 of the upper sealing plate 5 is misaligned with the inner cavity 12 of the material cylinder 1, thereby cutting off the connection between the sprue 71 of the fixed mold 7 and the material cylinder 1. Step S2: Move the injection punch 4 to the preset quantitative position to create a negative pressure in the material cylinder 1; move the side sealing plate 2 to connect the feed pipe 3 with the feed inlet 11 of the material cylinder 1, so that the soup in the heat preservation furnace enters through the feed pipe 3 and fills the material cylinder 1; Step S3: Move the side sealing plate 2 to disconnect the feed pipe 3 and the feed port 11, and the quantitative soup dispensing action is completed; Step S4: After completing the mold closing action, move the upper sealing plate 5 so that the opening 51 of the upper sealing plate 5 is aligned with the inner cavity 12 of the material cylinder 1, thereby connecting the sprue 71 of the fixed mold 7 with the material cylinder 1. Step S5: Begin the injection process; after cooling, open the mold and remove the casting. Step S6: Move the injection punch 4 back to the initial position.

[0057] Optionally, in step S2, the injection punch 4 moves to the preset quantitative position before or after the side sealing plate 2 is opened.

[0058] like Figure 8 and Figure 9 As shown, the position of the injection punch 4 is the initial position. When the injection punch 4 moves down to the quantitative position, the material cylinder 1 is evacuated, so that the inner cavity of the material cylinder 1 forms a negative pressure. Therefore, when the side sealing plate is opened, the soup in the heat preservation furnace can enter the inner cavity.

[0059] In step S2, as Figure 12 As shown, the quantitative process can be set before adding the soup ingredients, such as... Figure 13 As shown, preferably, the quantitative process can also be set after the molten material is fed. The injection punch 4 can first move to a position below the feed port 11, the side sealing plate 2 opens, and the molten material enters from the holding furnace along the feed pipe 3 and fills the volume of the barrel 1 at this time. Then the injection punch 4 moves to the quantitative position. During this process, the barrel 1 is always full. This can avoid the problem of air entrapment during the molten material descent caused by the height difference between the feed port 11 and the injection punch 4. In addition, mold closing is a major external operation of the die casting equipment, while quantitative molten material feeding (i.e., closing the upper sealing plate 5 to closing the side sealing plate 2, etc.) is a minor internal operation. These two do not affect each other. Quantitative molten material feeding can be carried out at the same time as mold closing, which is a common and efficient practice nowadays. Quantitative molten material feeding begins at the same time as the fixed mold and moving mold close, preparing for injection of molten material. Of course, quantitative molten material feeding can also be carried out after mold closing, which is an older process and has a longer waiting time.

[0060] This method isolates the gating channel 71 and retracts the injection punch 4 to create a vacuum before introducing the broth, thus forming a negative pressure environment. This ensures that the feed cylinder 1 remains sealed or isolated before and after feeding, preventing air from contacting the broth and preventing gas from being trapped. The metering is determined by the punch retracting to a preset position, ensuring good consistency and being unaffected by broth temperature, viscosity, or feeding pressure. Furthermore, it can be automated, significantly improving the quality of broth feeding, casting quality, and production efficiency. This method effectively overcomes problems such as oxidation caused by scooping, inaccurate metering, and high cost of pressure furnaces in the prior art.

[0061] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects. The scope of the invention is defined by the appended claims, not by the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0062] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A quantitative feeder for a die-casting molding equipment, characterized in that, include: The material cylinder (1) is fixed in the fixed plate (6) of the die casting molding equipment, and the side wall of the material cylinder (1) is provided with a feed inlet (11); Side sealing plate (2), the side sealing plate (2) is provided on the side wall of the material cylinder (1) and slides in a direction parallel to the axis of the material cylinder (1) to open or block the feed port (11); Feed pipe (3), one end of the feed pipe (3) is connected to the feed port (11), and the other end is used to connect to the external heat preservation furnace so as to introduce the soup in the heat preservation furnace into the feed cylinder (1); The injection punch (4) is disposed inside the material cylinder (1) and slides along the axial direction of the material cylinder (1) to change the available volume of the material cylinder (1) and realize quantitative soup dispensing; The upper sealing plate (5) is slidably disposed in the fixed mold (7) of the die-casting molding equipment. The upper sealing plate (5) is provided with an opening (51) adapted to the material cylinder (1). The upper sealing plate (5) is located above the material cylinder (1) and slides along a direction perpendicular to the axis of the material cylinder (1) so that the opening (51) is aligned or misaligned with the inner cavity (12) of the material cylinder (1), thereby opening or blocking the inner cavity (12).

2. The quantitative feeder for the die-casting equipment according to claim 1, characterized in that, The upper end of the inner cavity (12) is provided with a sealing ring (13), which is used to prevent the soup from being carried away from the feed cylinder (1) during the sliding process of the upper sealing plate (5).

3. The quantitative feeder for the die-casting equipment according to claim 1, characterized in that, The inner wall of the opening (51) is provided with a flow guide ring, which is used to adjust the flow state of the soup during the injection process.

4. The quantitative feeder for the die-casting equipment according to claim 3, characterized in that, The flow guide ring is a divergent flow guide ring (52). The divergent flow guide ring (52) includes a first contact surface (521), a second contact surface (522), and a third contact surface (523). The first contact surface (521) is connected to the inner wall of the opening (51). The second contact surface (522) is located vertically at the lower end of the first contact surface (521) and extends radially toward the center of the opening (51). The upper and lower ends of the third contact surface (523) are respectively connected to the first contact surface (521) and the second contact surface (522). The first contact surface (521) and the second contact surface (522) are both planes, and the third contact surface (523) is an arc surface.

5. The quantitative feeder for the die-casting equipment according to claim 3, characterized in that, The flow guide ring is a nozzle-type flow guide ring (53). The nozzle-type flow guide ring (53) includes a fourth contact surface (531) and a fifth contact surface (532). The fourth contact surface (531) is connected to the inner wall of the opening (51). The upper and lower ends of the fifth contact surface (532) are respectively connected to the upper and lower ends of the fourth contact surface (531). The fourth contact surface (531) is a plane, and the fifth contact surface (532) is an arc surface.

6. The quantitative feeder for the die-casting equipment according to claim 1, characterized in that, It also includes a side plate drive (8) and an upper plate drive (9), wherein the side plate drive (8) is connected to the side sealing plate (2) and drives the side sealing plate (2) to move, and the upper plate drive (9) is connected to the upper sealing plate (5) and drives the upper sealing plate (5) to move.

7. The quantitative feeder for the die-casting equipment according to claim 1, characterized in that, When the heat preservation furnace is located below the material cylinder (1), the end of the feed pipe (3) away from the feed port (11) extends downward to immerse itself below the liquid surface of the soup in the heat preservation furnace. Under the action of the negative pressure in the material cylinder (1) and / or the gas pressure on the inner surface of the heat preservation furnace, the soup in the heat preservation furnace is injected into the material cylinder (1) along the feed pipe (3).

8. The quantitative feeder for the die-casting equipment according to claim 1, characterized in that, When the heat preservation furnace is located above the material cylinder (1), the end of the feed pipe (3) away from the feed port (11) extends upward, and the height of the connection between the feed pipe (3) and the heat preservation furnace is not lower than the height of the top surface of the material cylinder (1). The soup flows into the material cylinder (1) along the feed pipe (3) under the action of gravity.

9. A quantitative feeding method for a die-casting molding equipment, characterized in that, The quantitative feeder for the die-casting equipment as described in any one of claims 1-8 comprises the following steps: Step S1: Start the mold closing action, move the upper sealing plate (5) so that the opening (51) of the upper sealing plate (5) is misaligned with the inner cavity (12) of the barrel (1), thereby cutting off the connection between the sprue (71) of the fixed mold (7) and the barrel (1). Step S2: Move the injection punch (4) to the preset quantitative position to create a negative pressure in the material cylinder (1); move the side sealing plate (2) to connect the feed pipe (3) with the feed inlet (11) of the material cylinder (1) so that the soup in the heat preservation furnace enters through the feed pipe (3) and fills the material cylinder (1); Step S3: Move the side sealing plate (2) to disconnect the feed pipe (3) and the feed port (11), and the quantitative soup dispensing action is completed; Step S4: After completing the mold closing action, move the upper sealing plate (5) so that the opening (51) of the upper sealing plate (5) is aligned with the inner cavity (12) of the material cylinder (1), thereby connecting the sprue (71) of the fixed mold (7) with the material cylinder (1). Step S5: Begin the injection process; after cooling, open the mold and remove the casting. Step S6: Move the injection punch (4) back to the initial position.

10. The quantitative feeding method for the die-casting molding equipment according to claim 9, characterized in that, In step S2, the injection punch (4) moves to the preset quantitative position before or after the side sealing plate (2) is opened.

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