Injection die casting relative to piston center

Abstract

A die casting system may employ a counter piston to enable central injection of large parts or multi-cavity parts. The die casting system may include a shot piston disposed on an injection side; and an opposing piston provided on the injector side. The opposed piston is movable between a sealed position for sealing the liquid in the shot cartridge during the pouring and slow injection phases and an open position for allowing the liquid to enter the casting cavity during the cavity injection phase.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to U.S. Provisional Patent Application No. 63 / 403,236, filed on September 1, 2022, the entire contents of which are incorporated herein by reference and for all purposes. Technical Field

[0003] The present application relates to a die casting machine and a die casting method using a counter piston. More specifically, the die casting machine or the die casting method uses a counter piston, which enables center injection die casting of large parts and / or multi-cavity parts. Background Art

[0004] Die casting is a manufacturing method that pours or forces molten metal into a mold (also called a die). The larger the die casting part, the larger the die casting machine required; the larger the die casting machine, the greater the clamping force required. In addition, as the die casting part becomes larger, the required molten metal flow length becomes longer. The castability of a given part is limited by the maximum allowable flow length.

[0005] Conventional die casting methods typically use a horizontal cold chamber machine with a billet and runner system, which requires a large clamping force and high material costs. The molten metal flows into the chamber or cavity mainly by pressure from one side. Therefore, the conventional die casting method has limited design control over the flow of molten metal during the filling process. Because the molten metal may overflow or flow into the cavity prematurely during the pouring and slow phases, the billet cannot be attached to the casting cavity. This conventional die casting method may result in a limited die casting process window, large energy losses due to low material yield, and low effectiveness of strengthening pressure. Regarding the casting of larger parts and / or multi-cavity parts, current die casting technology still has various limitations and unpredictability. Summary of the invention

[0006] The present disclosure generally relates to a die casting machine and die casting method with opposing pistons. More specifically, various embodiments of the present disclosure relate to a die casting machine or die casting method using opposing pistons that enable center injection of large castings and / or multi-cavity parts.

[0007] One aspect relates to a die casting machine having an ejector side and an injection side. The opposing piston die casting machine may include an opposing piston disposed on the ejector side, a shot piston disposed on the injection side, and a shot cartridge configured to receive the shot piston and a liquid.

[0008] A variation of the above aspect is as follows, wherein the opposing piston is movable between a first position and a second position.

[0009] A variation of the above aspect is as follows, wherein liquid is permitted to flow from the shot reservoir to the casting cavity when the relative piston is in the first position.

[0010] A variation of the above aspect is as follows, wherein liquid is prevented from flowing from the shot reservoir to the casting cavity when the relative piston is in the second position.

[0011] A variation of the above aspect is as follows, wherein the shot cartridge is sealed from the casting cavity by the opposing piston when the opposing piston is in the second position.

[0012] A variation of the above aspect is as follows, wherein the counter piston comprises a tapered edge on a side facing the shot cartridge, so as to create a compression seal with the tapered edge of the shot cartridge on a side facing the counter piston.

[0013] A variation of the above aspect is as follows, wherein the counter piston has a non-uniform surface facing the shot cartridge, the non-uniform surface being configured to form a corresponding non-uniform surface on the cast part.

[0014] A variation of the above aspect is as follows, wherein the relative piston is also movable to a third position.

[0015] A variation of the above aspect is as follows, wherein when the opposing piston is in the third position, the opposing piston is removed from the opposing piston cartridge for cleaning and lubrication.

[0016] A variation of the above aspect is as follows, wherein the shot cartridge includes a pouring hole configured to allow liquid to enter the shot cartridge.

[0017] A variation of the above aspect is as follows wherein the shot cartridge includes a vent configured to allow air to exit the shot cartridge.

[0018] A variation of the above aspect is as follows, wherein the opposing piston is connected to a drive cylinder configured to control the movement of the opposing piston.

[0019] Another aspect relates to a die casting method using an opposing piston. The method includes: moving the opposing piston to at least partially contact a shot cartridge to prevent liquid from flowing through the shot cartridge to a casting cavity. The method may also include: sliding the shot piston inside the shot cartridge to remove air from the inside of the shot cartridge; and moving the opposing piston away from the shot cartridge to allow liquid to enter the casting cavity.

[0020] A variation of the above aspect further includes removing the opposing piston from the opposing piston reservoir for cleaning and lubrication.

[0021] A variation of the above aspect further includes pouring the liquid into the shot cartridge through a pouring hole on the shot cartridge.

[0022] A variation of the above aspect is where removing air from the interior of the shot cartridge includes removing air from the shot cartridge through a vent on the shot cartridge.

[0023] Another aspect relates to a die casting machine configured to control the flow of molten metal into a casting cavity during a third phase. The die casting machine may include a housing, a shot cartridge, a shot piston, and a counter piston. The shot cartridge may be slidably disposed in the housing and form a container configured to receive molten metal and gas during a first phase. The shot piston may be configured to slide in the shot cartridge so that gas is removed from the container during a second phase, leaving molten metal. The counter piston may be slidably disposed in the housing so as to prevent molten metal from entering the casting cavity during the first and second phases, while allowing molten metal to enter the casting cavity during the third phase.

[0024] A variation of the above aspect is as follows, wherein the counter piston comprises a tapered edge on a side facing the shot cartridge, so as to create a compression seal with the tapered edge of the shot cartridge on a side facing the counter piston. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present disclosure is described with reference to the drawings, wherein like reference numerals refer to like elements throughout.

[0026] Figure 1A It is an illustrative front view of a conventional die casting full shot.

[0027] Figure 1B is an illustrative front view of a center injection die casting concept according to an embodiment of the present disclosure.

[0028] Figure 2A is a cross-sectional side view of an opposing piston die casting machine in a casting stage, taken along a central longitudinal axis of the opposing piston die casting machine according to a preferred embodiment of the present disclosure.

[0029] Figure 2B yes Figure 2A A cross-sectional side view of an opposing piston die casting machine during a slow injection phase, taken along the central longitudinal axis of the opposing piston die casting machine.

[0030] Figure 2C yes Figure 2A A cross-sectional side view of an opposing piston die casting machine in a filling phase, taken along a central longitudinal axis of the opposing piston die casting machine.

[0031] Figure 2D yes Figure 2AA cross-sectional side view of an opposing piston die casting machine in a solidification phase, taken along a central longitudinal axis of the opposing piston die casting machine.

[0032] Figure 3A is an illustrative cross-sectional view of another embodiment of an opposed piston die casting machine according to the present disclosure.

[0033] Figure 3B yes Figure 3A An illustrative top view of a relative piston die casting machine.

[0034] Figure 4A is a cross-sectional side view of an opposing piston die casting machine in a slow injection phase, taken along a central longitudinal axis of the opposing piston die casting machine according to another embodiment of the present disclosure.

[0035] Figure 4B yes Figure 4A A cross-sectional side view of an opposing piston die casting machine in a solidification phase, taken along a central longitudinal axis of the opposing piston die casting machine.

[0036] Figure 4C is a cross-sectional side view of an opposing piston die casting machine in a sealing stage, taken along a central longitudinal axis of the opposing piston die casting machine, according to another embodiment of the present disclosure.

[0037] Figure 4D yes Figure 4C A cross-sectional side view of an opposing piston die casting machine in a solidification phase, taken along a central longitudinal axis of the opposing piston die casting machine.

[0038] Figure 5 is a perspective view of an end surface of a shot cartridge of a piston die casting machine according to another embodiment of the present disclosure.

[0039] Fig. 6A is a perspective view of an end surface of a shot block of a piston die casting machine according to another embodiment of the present disclosure.

[0040] Figure 6B yes Fig. 6A A perspective view of the end face of the shot cartridge of a relative piston die casting machine.

[0041] Fig. 7A is a cross-sectional side view of an assembled opposing piston including an opposing piston cartridge and a shot cartridge in an extended position, taken along a central longitudinal axis of an opposing piston die casting machine according to the present disclosure.

[0042] Figure 7B yes Fig. 7A A perspective view of the end face of the shot cartridge of a relative piston die casting machine.

[0043] Figure 8is an illustration of an assembled opposing piston including an opposing piston cartridge and a shot cartridge, wherein the assembled opposing piston is connected to a motion control system.

[0044] Fig. 9 is a cross-sectional side view of the assembly of the injector main insert and the opposing piston with the blow air channel in the mold opening stage. DETAILED DESCRIPTION

[0045] In general, one or more aspects of the present disclosure relate to a die casting machine and die casting method using opposing pistons. In certain embodiments, the present disclosure relates to a die casting machine or die casting method using opposing pistons that enable center injection die casting of large parts and / or multi-cavity parts.

[0046] Die casting of large castings requires a long metal flow length. To shorten the metal flow length, there are two existing center injection methods. One method is center injection die casting through a three-plate mold configuration. The three-plate mold configuration can be complicated and costly, including an additional center plate, additional additional mold opening stroke, additional runner removal procedures, additional heat concentration in the middle plate, etc.

[0047] Another method is to use Figure 1A The illustrated horizontal cold die casting machine performs conventional die casting. The horizontal cold die casting machine 10 may have a blank 11, one or more runners 12, one or more ingates 13, one or more casting cavities (or cast parts) 14, one or more overflow holes 15, and one or more vents 16. Conventional methods require large openings and long runners 12 in the casting part 14. The runner 12 must be attached to the upper portion of the blank 11, resulting in inefficient runner systems and uneven flow distribution across the cavity, and limiting the die casting method operating window (e.g., the castable size of the cast part). The extra metal in the area of ​​the blank 11 and the runner 12 is generally not part of the casting part 14 and is scrapped. Therefore, in order to die cast large parts (e.g., vehicle chassis), simply expanding and / or combining existing die casting technologies is not an economical and practical solution.

[0048] The relative piston die casting system according to the present disclosure can solve one or more of the problems discussed above. For example, in some embodiments, the use of relative pistons to control the flow of molten metal allows the molten metal to be injected directly into the mold cavity. Figure 1BAs shown, the relative piston die casting system 20 can eliminate (or significantly reduce) the flow channel while also allowing the blank 24 to be part of the die casting product, reducing production costs. By using relative pistons, the relative piston die casting system can control the flow of molten metal and ensure uniform flow of molten metal, thereby making the casting of large parts predictable and repeatable. In some embodiments, the relative piston center injection die casting method disclosed herein can reduce the clamping tonnage required by the die casting machine (for example, by about 15% to 30%), increase the material yield (for example, compared to about 60% of the conventional die casting method, to about 90%), widen the die casting operation window due to the shortened molten metal filling distance, and achieve better die casting quality due to better enhanced pressure effectiveness compared to conventional die casting.

[0049] FIG. 2A to FIG. 2D An exemplary embodiment of a die casting machine 100 according to the present disclosure is shown. In some embodiments, the die casting machine 100 may include a shot piston 101 from an injection side A and a counter piston 106 from an ejector side B. In some embodiments, on the injection side A, the die casting machine 100 may include a machine platen 103 and a fixed die 104 attached to the machine platen 103. In some embodiments, the shot cartridge 102 may be positioned inside the fixed die 104 and / or the machine platen 103 and configured to receive molten metal 119. The shot piston 101 may be configured to be movable inside the shot cartridge 102 and between a first position and a second position. In some embodiments, the first position may be at an end of the shot cartridge 102 near the injection side A; and the second position of the shot piston 101 may be at an end of the shot cartridge 102 near the ejector side B. In some embodiments, the shot cartridge 102 may include a vent 117 to allow air to escape and a pouring hole 118 to allow molten metal 119 to enter. The space between the stationary die and the ejector main insert may define a casting cavity 116 configured to receive molten metal 119 and form a cast part.

[0050] In some embodiments, on the injector side B, the die casting machine 100 may include an injector main insert 105 (or an ejector die) and / or an injector retainer block 114 attached to the injector main insert 105. The injector main insert 105 may include a relative piston cartridge 115 configured to receive and retain a relative piston 106. The relative piston 106 may be configured to be movable between a sealing position and an open position. In some embodiments, the relative piston 106 may be configured to contact and seal the shot cartridge 102 on the injector side B of the shot cartridge 102 when in the sealing position. In other embodiments, the sealing position of the relative piston 106 may be further toward the injection side A than the open position of the relative piston 106. The relative piston 106 may be configured to not contact the shot cartridge 102 when in the open position, so that the shot cartridge 102 is not sealed by the relative piston 106, but is open to the casting cavity 116. In some embodiments, the opposing piston 106 can be fully received by the opposing piston cartridge 115 when in the open position. In other embodiments, the opposing piston 106 can be at least partially received by the opposing piston cartridge 115.

[0051] In some embodiments, the die casting machine 100 may further include an injector platen 110 and an injector back plate 111 attached to the injector platen 110 on the injector side B. In some embodiments, one or more injector control rods 109 may be positioned inside the injector platen 110 and / or the injector back plate 111. The injector control rod 109 may be attached to the injector plate 112 and configured to push or pull the injector plate 112. The die casting machine 100 may further include one or more relative piston support blocks 107, which are positioned between the injector main insert 105 (and / or the injector retainer block 114) and the injector platen 110 (and / or the injector back plate 111), as shown in FIG. Figure 2A The injector plate 112 may be configured to be movable relative to the opposing piston support block 107 within a space between the injector main insert 105 (and / or the injector retainer block 114) and the injector pressure plate 110 (and / or the injector back plate 111). One end of one or more ejector pins 113 may be attached to the ejector plate 112 and the other end may be positioned inside the injector main insert 105 (and / or the injector retainer block 114).

[0052] like Figure 2A As shown, during the pouring stage, molten metal 119 can be poured into the shot cartridge 102 through the pouring hole 118 with the shot piston 101 in the first position. In some embodiments, the first position of the shot piston 101 can be positioned further toward the injection side A than the pouring hole 118.

[0053] During the slow injection phase, Figure 2B As shown, the molten metal 119 can be gently pushed by the shot piston 101 toward the casting cavity 116 on the ejector side B. In some embodiments, the air in the shot barrel 102 can escape from the shot barrel 102 through the vent 117 during the slow injection stage and be removed. During the slow injection stage, the counter piston 106 can stay in the sealing position. Figure 2B As shown, when the relative piston 115 is in a sealing position (e.g., resting against the end surface of the shot cartridge 102), two separate air chambers can be created by sealing the opening of the shot cartridge 102 facing the casting cavity 116, one air chamber in the casting cavity 116 and the other air chamber in the shot cartridge. The two separate air chambers can help achieve a high vacuum level in the mold cavity without allowing the molten metal 119 to enter.

[0054] Figure 2C The die casting machine 100 is shown in a filling phase during which molten metal 119 is allowed to enter the casting cavity 116. During the filling phase, the opposing piston 106 can be in an open position and the casting cavity 116 is not obstructed by the opposing piston 106. In some embodiments, the filling phase can begin, and after the shot piston 101 moves toward the ejector side B and passes through the vent 117 to reach the second position of the shot piston 101, the opposing piston 106 can be moved to the open position so that substantially all of the air in the shot cartridge 102 has been removed through the vent 117.

[0055] Figure 2D The die casting machine 100 is shown in a solidification phase, in which the casting cavity 116 can be substantially filled with molten metal 119. In the solidification phase, the shot piston 101 can reach the second position of the shot piston 101, thereby pushing and maintaining the molten metal 119 in the casting cavity 116; and the relative piston 106 can stay in the open position. During the solidification phase, the molten metal 119 can cool in the casting cavity 116 and form a cast part.

[0056] During the die casting process, runners and billet segments are used to direct the flow of molten metal and achieve certain qualities or characteristics (e.g., temperature, flow rate, etc.) before entering the casting cavity. In some embodiments, runners and billet segments can be eliminated or reduced compared to conventional die casting methods by using a relative piston die casting method according to the present disclosure. With the help of the relative piston, the flow of the molten metal can be controlled by pressure from both sides (the injection piston and the relative piston). With the increase in control over the flow, the size of any runner and billet segment can be designed (e.g., reduced) without adversely affecting the desired quality and characteristics of the molten metal.

[0057] In some embodiments, the billet and runner shape can also be configured as part of the casting geometry to reduce waste in the runner and billet system. With the opposing piston, the opposing piston die casting method can allow the injection point to be placed at any desired position because the flow of the molten metal can be controlled by both the opposing piston and the injection piston. Therefore, the billet and runner can be configured as part of the casting geometry or at least reduce material waste by reducing the size of the billet and runner.

[0058] FIG. 3A to FIG. 3B An example of a relative piston die casting method having an injection piston 201 and a relative piston 206 is shown. Figure 3A As shown, the relative piston die casting method can be configured with a runner 213 and a blank 214 as part of a cast part 211 with a possible ingate location 212. In some embodiments, the minimum blank thickness can be equal to or greater than the desired cast part thickness at that location. In some embodiments, for example, a heavy structure having a thickness exceeding 5 mm and / or having reinforcing ribs can be cast using the relative piston die casting method without a runner.

[0059] The relative piston die casting method according to the present disclosure may also include a seal or vent slot design configured to seal the molten metal 119 in the shot cartridge 102 prior to the cavity filling stage. In some embodiments, the seal design may be as follows: FIG. 2A to FIG. 2B In some embodiments, the conical surface pressing seal 121 is disposed between the conical edges of the relative piston 106 and the injection cartridge 102. FIG. 4A to FIG. 4D As shown, the seal design can be a cylindrical face-fitting seal 321. In some embodiments, the cylindrical face-fitting seal 321 is disposed between the right-angle edge of the piston 306 and the inner surface of the shot cartridge 302 (see Figure 4A ).

[0060] Because the conical surface compression seal 121 can reach the sealing position of the relative piston 106 within a shorter distance from the open position of the relative piston 106, the relative piston 106 with the conical surface compression seal 121 has more advantages than the cylindrical surface matching seal 321 (see Figure 2A and Figure 4A). The counter piston 106 with the conical surface compression seal 121 can also be more tolerant to the mismatch between the center axis of the shot cartridge 102 and the center axis of the counter piston 106. The advantage of the counter piston 306 with the cylindrical surface fit seal 321 can be that the casting cavity 316 can have an injector side surface (e.g., the side of the casting cavity 416 facing the injector side B) that is not restricted by the conical edge of the conical surface compression seal 121. In some embodiments, as Figure 4B As shown, the ejector side surface of the casting cavity 316 can be configured to be flat using a cylindrical face fitting seal 321. Figure 4D As shown, the injector side surface of the casting cavity 316 can be configured to be uneven (e.g., angled) with the cylindrical surface of the seal. FIG. 4C to FIG. 4D As shown, the injection piston 401 may also have an uneven injector-side surface (eg, a side of the injection piston 401 facing the injector side B) and a blank having an uneven profile.

[0061] The relative piston die casting system can also include an ingrate design including an ingrate cutout or ridge disposed on an end face of the shot cartridge (e.g., the face of the shot cartridge facing the casting cavity). The ingrate cutout or ridge can be configured to form a desired pattern on the casting cavity / cast part. The ingrate cutout or ridge can have a size (e.g., width and thickness) and position around the blank. The size and position can be configured according to the desired casting design. Figure 5 The end face 51 of the shot cartridge 50 is shown with a plurality of ingate cutouts 52. The shot cartridge 50 may also include a face-fitting seal 53 (e.g., a compression seal face or leading face) disposed on the inner surface of the shot cartridge 50. Figure 5 As shown, a plurality of gate cutouts 52 may be distributed around the circular end surface 51 .

[0062] In some embodiments, the opposing piston die casting system may further include one or more cutouts or ridges disposed on an end face of the opposing piston (e.g., the face of the opposing piston facing the casting cavity). The one or more cutouts or ridges of the opposing piston may be configured to cooperate with one or more ingates of the shot cartridge to function as a conventional fixed shot distributor (e.g., a shot block or shot gate). The combination of the one or more cutouts or ridges of the opposing piston and the one or more ingates of the shot cartridge may be configured to adjust the molten metal flow to preferably flow in a certain manner (e.g., a certain direction or at a certain flow rate) and to form a desired pattern on the casting cavity / cast part, such as FIG. 6A to FIG. 6B shown. Figure 6BAn end face 61 of a shot cartridge 61 is shown having an ingate notch 62 and a face-fitting seal 63 (eg, a compression seal face or leading face). Fig. 6A An end face 67 of a counter piston 66 is shown having a ridge 65 disposed on the end face 67 and configured to cooperate with the ingrate slot 62. The counter piston 66 may also include a face-fitting seal 65 (e.g., a compression seal face or leading face) disposed on the end face and configured to cooperate with the face-fitting seal 63.

[0063] FIG. 7A to FIG. 7B An embodiment of an opposing piston die casting system is shown that employs a vent slot 716 to facilitate sealing between the shot cartridge 702 and the opposing piston 706. Figure 7B As shown, the shot cartridge 702 having an end face 721 and a plurality of ingate cutouts 722 may include a vent slot 716 disposed on the end face 721 . Fig. 7A It is shown that the shot cartridge 702 can be configured to contact the opposing piston 706 so that only the lower portion of the end face 721 of the shot cartridge 702 is sealed, and the shot cartridge 702 can be configured to be linked to the casting cavity or ambient air for ventilation purposes. When using a conventional ventilation process (e.g., FIG. 2A to FIG. 2D In the case where there is no vent in the shot cartridge (as shown), it may be advantageous to include a vent slot 716 in the seal design.

[0064] The structural design of the relative piston and / or relative piston cartridge for the relative piston die-casting system according to the present disclosure can be similar to the structural design of the traditional solid injection piston and / or injection cartridge. For example, the fitting clearance between the relative piston and the relative piston cartridge can be maintained within a range similar to the fitting clearance between the traditional solid injection piston and the injection cartridge. The relative piston die-casting system can also adopt a thermal control method similar to the thermal control method of the traditional die-casting system, but the control is more stringent to maintain the shape of the relative piston end face more uniform, thereby achieving the purpose of sealing. In some embodiments, the relative piston and its cartridge (for example, manufactured using 3D printing) can be used to achieve internal cooling. Since the relative piston may have a shorter moving stroke and a lower moving speed, the expected service life of the relative piston may be much longer than that of the traditional solid injection piston.

[0065] In some embodiments, FIG. 2A to FIG. 2DAs shown, the position of the relative piston can be controlled by a drive cylinder 108 in the ejector box. The drive cylinder 108 can apply pressure to properly seal the surface between the relative piston 106 and the shot cartridge 102. In some embodiments, the drive cylinder 108 can also control the movement of the relative piston 106 based on the timing requirements of the die casting process. In other embodiments, such as Figure 8 As shown, the relative movement of piston 806 can be controlled by circuit 800 (e.g., hydraulic circuit). In some embodiments, hydraulic circuit 800 can include a two-position servo valve, a pressure reducing valve, a drive motor, and an oil tank. In some embodiments, the die casting system can also include a die casting machine control system to send a signal for controlling the servo valve.

[0066] In some embodiments, the opposing piston die casting system may include a die opening phase during which the solidified cast part may be removed from the casting cavity. Fig. 9 As shown, the relative piston 906 can be moved out of the relative piston cartridge 915 toward the injection side A at the third position to push the solidified cast part out of the casting cavity 916 during the mold opening stage. In some embodiments, the relative piston die casting system may include one or more air blow-out channels 925, which are configured to blow air and cleaning debris (if any) out of the relative piston recess 926 arranged between the relative piston 906 and the relative piston cartridge 915. In some embodiments, the one or more air blow-out channels 925 can be provided on the surface of the ejector main insert 905 (e.g., the surface facing the relative piston). In other embodiments, the one or more air blow-out channels 925 can be provided on one or more damping plates 924, which are attached to the surface of the ejector main insert 905 (e.g., the surface facing the relative piston). In some embodiments, the one or more air blow-out channels 925 can be implemented on one or more damping plates 924 by one or more built-in air nozzles. During the mold opening phase, after cleaning the opposing piston (eg, air blow-out cleaning), an external oil spray may also be applied to the opposing piston for lubrication.

[0067] The foregoing disclosure is not intended to limit the disclosure to the precise form or specific field of use disclosed. Thus, it should be contemplated that various alternative embodiments and / or modifications of the disclosure are possible in view of the disclosure, whether or not explicitly described or implied herein. Having thus described the embodiments of the disclosure, it should be recognized by those of ordinary skill in the art that changes may be made in form and detail without departing from the scope of the disclosure. Therefore, the disclosure is limited only by the claims.

[0068] In the foregoing description, the present disclosure has been described with reference to specific embodiments. However, those skilled in the art will appreciate that, without departing from the spirit and scope of the present disclosure, the various embodiments disclosed herein may be modified or otherwise implemented in various other ways. Thus, this description is considered to be illustrative and is intended to teach those skilled in the art to make and use the various embodiments of the disclosed relative piston die casting system or method. It should be understood that the form of the disclosure shown and described herein should be considered as a representative embodiment. Equivalent elements, materials, processes or steps may replace the elements, materials, processes or steps illustrated and described in a representative manner herein. Moreover, certain features of the present disclosure may be utilized independently of the use of other features, all of which are obvious to those skilled in the art after benefiting from this specification of the present disclosure. Expressions such as "including", "comprising", "incorporating", "consisting of", "having", "is" and the like used to describe and claim the present disclosure are intended to be interpreted in a non-exclusive manner, that is, it is allowed that there are also items, parts or elements that are not explicitly described. References to the singular are also to be construed as relating to the plural.

[0069] Further, various embodiments disclosed herein should be understood with illustrative and explanatory meanings, and should never be interpreted as limitations to the present disclosure.All references in conjunction with (e.g., attach, adhere, couple, connect, etc.) are only used to help readers understand the present disclosure, and will not produce restrictions, specifically the position, orientation or use restrictions of the system and / or method disclosed herein.Therefore, the combined reference (if any) should be interpreted in a broad sense.And, this combined reference does not necessarily infer that two elements are directly connected to each other.Additionally, all numerical terms such as but not limited to "first", "second", "third", "primary", "minor", "primary" or any other common and / or numerical terms should also be regarded as identifiers only, to assist readers in understanding the various elements, embodiments, variations and / or modifications of the present disclosure, and will not produce any restrictions, specifically about any element, embodiment, variation and / or modification relative to or better than the order or preference of another element, embodiment, variation and / or modification.

[0070] It should also be appreciated that one or more of the elements depicted in the drawings may also be implemented in a more separate or integrated manner, or even removed or rendered inoperable in some cases, depending on the use of a specific application.

Claims

1. A die casting machine having an ejector side and an injection side, the die casting machine comprising: relative to the piston, disposed on the injector side; An injection piston is disposed on the injection side; as well as The shooting cartridge is configured to receive the shooting piston and liquid. 2 . The die casting machine according to claim 1 , wherein the opposing piston is movable between a first position and a second position.

3. The die casting machine of claim 2, wherein when the opposing piston is in the first position, the liquid is allowed to flow from the shot reservoir to the casting cavity.

4. The die casting machine of claim 2, wherein when the opposing piston is in the second position, the liquid is prevented from flowing from the shot reservoir to the casting cavity. 5 . The die casting machine according to claim 2 , wherein when the opposing piston is in the second position, the shot cartridge is sealed from the casting cavity by the opposing piston. 6 . The die casting machine according to claim 5 , wherein the counter piston comprises a tapered edge on a side facing the shot cartridge to create a compression seal with the tapered edge of the shot cartridge on a side facing the counter piston.

7. The die casting machine of claim 1, wherein the opposing piston has a non-uniform surface facing the shot cartridge, the non-uniform surface being configured to form a corresponding non-uniform surface on the cast part.

8. The die casting machine according to claim 2, wherein the opposing piston is further movable to a third position.

9. The die casting machine of claim 8, wherein when the opposing piston is in the third position, the opposing piston is removed from an opposing piston reservoir for cleaning and lubrication.

10. The die casting machine of claim 1, wherein the shot cassette includes a pouring hole configured to allow the liquid to enter the shot cassette.

11. The die casting machine of claim 1 , wherein the shot accumulator includes a vent configured to allow air to exit the shot accumulator.

12. The die casting machine of claim 1, wherein the opposing piston is connected to a drive cylinder configured to control movement of the opposing piston.

13. A die casting method using a relative piston, the method comprising: moving the opposing piston to at least partially contact a shot cartridge to prevent liquid from flowing from the shot cartridge to a casting cavity; Sliding a shot piston inside the shot barrel to remove air from inside the shot barrel; and The opposing piston is moved away from the shot cartridge to allow the liquid to enter the casting cavity.

14. The die casting machine according to claim 13, further comprising: The opposing pistons are removed from the opposing piston cartridges for cleaning and lubrication.

15. The die casting machine according to claim 13, further comprising: The liquid is poured into the shot cartridge through a pouring hole on the shot cartridge.

16. The die casting machine of claim 13, wherein removing air from the interior of the shot spool comprises: Air is removed from the shot cartridge from a vent on the shot cartridge.

17. A die casting machine configured to control the flow of molten metal into a casting cavity during a third stage, the die casting machine comprising: case; a shot cartridge slidably disposed in the housing and forming a container configured to receive the molten metal and gas during a first stage; a shot piston configured to slide in the shot cartridge to remove the gas from the vessel, leaving the molten metal, during a second stage; as well as A relative piston is slidably disposed in the housing to prevent the molten metal from entering the casting cavity during the first stage and the second stage, and to allow the molten metal to enter the casting cavity during the third stage.

18. The die casting machine of claim 17, wherein the counter piston comprises a tapered edge on a side facing the shot cartridge to create a compression seal with the tapered edge of the shot cartridge on a side facing the counter piston.

19. The die casting machine of claim 17, wherein the opposing piston has a non-uniform surface facing the shot cartridge, the non-uniform surface being configured to form a corresponding non-uniform surface on the cast part.

20. The die casting machine of claim 17, wherein the opposing piston is connected to a drive cylinder configured to control movement of the opposing piston.

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